-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
+
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
*
*/
#include <stdio.h>
+#include <time.h>
#include "../ssl_locl.h"
#include "statem_locl.h"
#include <openssl/buffer.h>
#include <openssl/bn.h>
#include <openssl/engine.h>
+static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt);
+static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt);
+
static ossl_inline int cert_req_allowed(SSL *s);
static int key_exchange_expected(SSL *s);
-static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
- unsigned char *p);
-
+ WPACKET *pkt);
/*
* Is a CertificateRequest message allowed at the moment or not?
{
/* TLS does not like anon-DH with client cert */
if ((s->version > SSL3_VERSION
- && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
- || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
+ && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
+ || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
return 0;
return 1;
* Return values are:
* 1: Yes
* 0: No
- * -1: Error
*/
static int key_exchange_expected(SSL *s)
{
return 0;
}
+/*
+ * ossl_statem_client_read_transition() encapsulates the logic for the allowed
+ * handshake state transitions when a TLS1.3 client is reading messages from the
+ * server. The message type that the server has sent is provided in |mt|. The
+ * current state is in |s->statem.hand_state|.
+ *
+ * Return values are 1 for success (transition allowed) and 0 on error
+ * (transition not allowed)
+ */
+static int ossl_statem_client13_read_transition(SSL *s, int mt)
+{
+ OSSL_STATEM *st = &s->statem;
+
+ /*
+ * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't
+ * yet negotiated TLSv1.3 at that point so that is handled by
+ * ossl_statem_client_read_transition()
+ */
+
+ switch (st->hand_state) {
+ default:
+ break;
+
+ case TLS_ST_CW_CLNT_HELLO:
+ /*
+ * This must a ClientHello following a HelloRetryRequest, so the only
+ * thing we can get now is a ServerHello.
+ */
+ if (mt == SSL3_MT_SERVER_HELLO) {
+ st->hand_state = TLS_ST_CR_SRVR_HELLO;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_SRVR_HELLO:
+ if (mt == SSL3_MT_ENCRYPTED_EXTENSIONS) {
+ st->hand_state = TLS_ST_CR_ENCRYPTED_EXTENSIONS;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_ENCRYPTED_EXTENSIONS:
+ if (s->hit) {
+ if (mt == SSL3_MT_FINISHED) {
+ st->hand_state = TLS_ST_CR_FINISHED;
+ return 1;
+ }
+ } else {
+ if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
+ st->hand_state = TLS_ST_CR_CERT_REQ;
+ return 1;
+ }
+ if (mt == SSL3_MT_CERTIFICATE) {
+ st->hand_state = TLS_ST_CR_CERT;
+ return 1;
+ }
+ }
+ break;
+
+ case TLS_ST_CR_CERT_REQ:
+ if (mt == SSL3_MT_CERTIFICATE) {
+ st->hand_state = TLS_ST_CR_CERT;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_CERT:
+ if (mt == SSL3_MT_CERTIFICATE_VERIFY) {
+ st->hand_state = TLS_ST_CR_CERT_VRFY;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_CERT_VRFY:
+ if (mt == SSL3_MT_FINISHED) {
+ st->hand_state = TLS_ST_CR_FINISHED;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_OK:
+ if (mt == SSL3_MT_NEWSESSION_TICKET) {
+ st->hand_state = TLS_ST_CR_SESSION_TICKET;
+ return 1;
+ }
+ if (mt == SSL3_MT_KEY_UPDATE) {
+ st->hand_state = TLS_ST_CR_KEY_UPDATE;
+ return 1;
+ }
+ break;
+ }
+
+ /* No valid transition found */
+ return 0;
+}
+
/*
* ossl_statem_client_read_transition() encapsulates the logic for the allowed
* handshake state transitions when the client is reading messages from the
* server. The message type that the server has sent is provided in |mt|. The
* current state is in |s->statem.hand_state|.
*
- * Return values are:
- * 1: Success (transition allowed)
- * 0: Error (transition not allowed)
+ * Return values are 1 for success (transition allowed) and 0 on error
+ * (transition not allowed)
*/
int ossl_statem_client_read_transition(SSL *s, int mt)
{
OSSL_STATEM *st = &s->statem;
int ske_expected;
- switch(st->hand_state) {
+ /*
+ * Note that after writing the first ClientHello we don't know what version
+ * we are going to negotiate yet, so we don't take this branch until later.
+ */
+ if (SSL_IS_TLS13(s)) {
+ if (!ossl_statem_client13_read_transition(s, mt))
+ goto err;
+ return 1;
+ }
+
+ switch (st->hand_state) {
+ default:
+ break;
+
case TLS_ST_CW_CLNT_HELLO:
if (mt == SSL3_MT_SERVER_HELLO) {
st->hand_state = TLS_ST_CR_SRVR_HELLO;
st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
return 1;
}
+ } else {
+ if (mt == SSL3_MT_HELLO_RETRY_REQUEST) {
+ st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST;
+ return 1;
+ }
+ }
+ break;
+
+ case TLS_ST_EARLY_DATA:
+ /*
+ * We've not actually selected TLSv1.3 yet, but we have sent early
+ * data. The only thing allowed now is a ServerHello or a
+ * HelloRetryRequest.
+ */
+ if (mt == SSL3_MT_SERVER_HELLO) {
+ st->hand_state = TLS_ST_CR_SRVR_HELLO;
+ return 1;
+ }
+ if (mt == SSL3_MT_HELLO_RETRY_REQUEST) {
+ st->hand_state = TLS_ST_CR_HELLO_RETRY_REQUEST;
+ return 1;
}
break;
case TLS_ST_CR_SRVR_HELLO:
if (s->hit) {
- if (s->tlsext_ticket_expected) {
+ if (s->ext.ticket_expected) {
if (mt == SSL3_MT_NEWSESSION_TICKET) {
st->hand_state = TLS_ST_CR_SESSION_TICKET;
return 1;
st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
return 1;
} else if (s->version >= TLS1_VERSION
- && s->tls_session_secret_cb != NULL
- && s->session->tlsext_tick != NULL
- && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
+ && s->ext.session_secret_cb != NULL
+ && s->session->ext.tick != NULL
+ && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
/*
* Normally, we can tell if the server is resuming the session
* from the session ID. EAP-FAST (RFC 4851), however, relies on
st->hand_state = TLS_ST_CR_CHANGE;
return 1;
} else if (!(s->s3->tmp.new_cipher->algorithm_auth
- & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
+ & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
if (mt == SSL3_MT_CERTIFICATE) {
st->hand_state = TLS_ST_CR_CERT;
return 1;
}
} else {
ske_expected = key_exchange_expected(s);
- if (ske_expected < 0)
- return 0;
/* SKE is optional for some PSK ciphersuites */
if (ske_expected
- || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
- && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
+ || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
+ && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
st->hand_state = TLS_ST_CR_KEY_EXCH;
return 1;
}
} else if (mt == SSL3_MT_CERTIFICATE_REQUEST
- && cert_req_allowed(s)) {
- st->hand_state = TLS_ST_CR_CERT_REQ;
- return 1;
+ && cert_req_allowed(s)) {
+ st->hand_state = TLS_ST_CR_CERT_REQ;
+ return 1;
} else if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
+ st->hand_state = TLS_ST_CR_SRVR_DONE;
+ return 1;
}
}
}
case TLS_ST_CR_CERT:
/*
* The CertificateStatus message is optional even if
- * |tlsext_status_expected| is set
+ * |ext.status_expected| is set
*/
- if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
+ if (s->ext.status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
st->hand_state = TLS_ST_CR_CERT_STATUS;
return 1;
}
case TLS_ST_CR_CERT_STATUS:
ske_expected = key_exchange_expected(s);
- if (ske_expected < 0)
- return 0;
/* SKE is optional for some PSK ciphersuites */
- if (ske_expected
- || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
- && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
+ if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
+ && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
st->hand_state = TLS_ST_CR_KEY_EXCH;
return 1;
}
- return 0;
+ goto err;
}
/* Fall through */
st->hand_state = TLS_ST_CR_CERT_REQ;
return 1;
}
- return 0;
+ goto err;
}
/* Fall through */
break;
case TLS_ST_CW_FINISHED:
- if (s->tlsext_ticket_expected) {
+ if (s->ext.ticket_expected) {
if (mt == SSL3_MT_NEWSESSION_TICKET) {
st->hand_state = TLS_ST_CR_SESSION_TICKET;
return 1;
}
break;
- default:
+ case TLS_ST_OK:
+ if (mt == SSL3_MT_HELLO_REQUEST) {
+ st->hand_state = TLS_ST_CR_HELLO_REQ;
+ return 1;
+ }
break;
}
+ err:
/* No valid transition found */
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE);
+ SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE);
return 0;
}
/*
- * client_write_transition() works out what handshake state to move to next
- * when the client is writing messages to be sent to the server.
+ * ossl_statem_client13_write_transition() works out what handshake state to
+ * move to next when the TLSv1.3 client is writing messages to be sent to the
+ * server.
*/
-WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
+static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s)
{
OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_OK:
- /* Renegotiation - fall through */
- case TLS_ST_BEFORE:
- st->hand_state = TLS_ST_CW_CLNT_HELLO;
- return WRITE_TRAN_CONTINUE;
+ /*
+ * Note: There are no cases for TLS_ST_BEFORE because we haven't negotiated
+ * TLSv1.3 yet at that point. They are handled by
+ * ossl_statem_client_write_transition().
+ */
+ switch (st->hand_state) {
+ default:
+ /* Shouldn't happen */
+ return WRITE_TRAN_ERROR;
- case TLS_ST_CW_CLNT_HELLO:
- /*
- * No transition at the end of writing because we don't know what
- * we will be sent
- */
- return WRITE_TRAN_FINISHED;
+ case TLS_ST_CW_CLNT_HELLO:
+ /* We only hit this in the case of HelloRetryRequest */
+ return WRITE_TRAN_FINISHED;
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- st->hand_state = TLS_ST_CW_CLNT_HELLO;
+ case TLS_ST_CR_HELLO_RETRY_REQUEST:
+ st->hand_state = TLS_ST_CW_CLNT_HELLO;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CR_FINISHED:
+ if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY
+ || s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING)
+ st->hand_state = TLS_ST_PENDING_EARLY_DATA_END;
+ else
+ st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT
+ : TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_PENDING_EARLY_DATA_END:
+ if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
+ st->hand_state = TLS_ST_CW_END_OF_EARLY_DATA;
return WRITE_TRAN_CONTINUE;
+ }
+ /* Fall through */
+
+ case TLS_ST_CW_END_OF_EARLY_DATA:
+ st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT
+ : TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CERT:
+ /* If a non-empty Certificate we also send CertificateVerify */
+ st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY
+ : TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
- case TLS_ST_CR_SRVR_DONE:
- if (s->s3->tmp.cert_req)
- st->hand_state = TLS_ST_CW_CERT;
- else
- st->hand_state = TLS_ST_CW_KEY_EXCH;
+ case TLS_ST_CW_CERT_VRFY:
+ st->hand_state = TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CR_KEY_UPDATE:
+ if (s->key_update != SSL_KEY_UPDATE_NONE) {
+ st->hand_state = TLS_ST_CW_KEY_UPDATE;
return WRITE_TRAN_CONTINUE;
+ }
+ /* Fall through */
- case TLS_ST_CW_CERT:
- st->hand_state = TLS_ST_CW_KEY_EXCH;
+ case TLS_ST_CW_KEY_UPDATE:
+ case TLS_ST_CR_SESSION_TICKET:
+ case TLS_ST_CW_FINISHED:
+ st->hand_state = TLS_ST_OK;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_OK:
+ if (s->key_update != SSL_KEY_UPDATE_NONE) {
+ st->hand_state = TLS_ST_CW_KEY_UPDATE;
return WRITE_TRAN_CONTINUE;
+ }
+
+ /* Try to read from the server instead */
+ return WRITE_TRAN_FINISHED;
+ }
+}
+
+/*
+ * ossl_statem_client_write_transition() works out what handshake state to
+ * move to next when the client is writing messages to be sent to the server.
+ */
+WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
+{
+ OSSL_STATEM *st = &s->statem;
+
+ /*
+ * Note that immediately before/after a ClientHello we don't know what
+ * version we are going to negotiate yet, so we don't take this branch until
+ * later
+ */
+ if (SSL_IS_TLS13(s))
+ return ossl_statem_client13_write_transition(s);
+
+ switch (st->hand_state) {
+ default:
+ /* Shouldn't happen */
+ return WRITE_TRAN_ERROR;
- case TLS_ST_CW_KEY_EXCH:
+ case TLS_ST_OK:
+ if (!s->renegotiate) {
/*
- * For TLS, cert_req is set to 2, so a cert chain of nothing is
- * sent, but no verify packet is sent
+ * We haven't requested a renegotiation ourselves so we must have
+ * received a message from the server. Better read it.
*/
+ return WRITE_TRAN_FINISHED;
+ }
+ /* Renegotiation - fall through */
+ case TLS_ST_BEFORE:
+ st->hand_state = TLS_ST_CW_CLNT_HELLO;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CLNT_HELLO:
+ if (s->early_data_state == SSL_EARLY_DATA_CONNECTING) {
/*
- * XXX: For now, we do not support client authentication in ECDH
- * cipher suites with ECDH (rather than ECDSA) certificates. We
- * need to skip the certificate verify message when client's
- * ECDH public key is sent inside the client certificate.
+ * We are assuming this is a TLSv1.3 connection, although we haven't
+ * actually selected a version yet.
*/
- if (s->s3->tmp.cert_req == 1) {
- st->hand_state = TLS_ST_CW_CERT_VRFY;
- } else {
- st->hand_state = TLS_ST_CW_CHANGE;
- }
- if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
- st->hand_state = TLS_ST_CW_CHANGE;
- }
+ st->hand_state = TLS_ST_EARLY_DATA;
return WRITE_TRAN_CONTINUE;
+ }
+ /*
+ * No transition at the end of writing because we don't know what
+ * we will be sent
+ */
+ return WRITE_TRAN_FINISHED;
+
+ case TLS_ST_EARLY_DATA:
+ return WRITE_TRAN_FINISHED;
+
+ case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
+ st->hand_state = TLS_ST_CW_CLNT_HELLO;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CR_SRVR_DONE:
+ if (s->s3->tmp.cert_req)
+ st->hand_state = TLS_ST_CW_CERT;
+ else
+ st->hand_state = TLS_ST_CW_KEY_EXCH;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CERT:
+ st->hand_state = TLS_ST_CW_KEY_EXCH;
+ return WRITE_TRAN_CONTINUE;
- case TLS_ST_CW_CERT_VRFY:
+ case TLS_ST_CW_KEY_EXCH:
+ /*
+ * For TLS, cert_req is set to 2, so a cert chain of nothing is
+ * sent, but no verify packet is sent
+ */
+ /*
+ * XXX: For now, we do not support client authentication in ECDH
+ * cipher suites with ECDH (rather than ECDSA) certificates. We
+ * need to skip the certificate verify message when client's
+ * ECDH public key is sent inside the client certificate.
+ */
+ if (s->s3->tmp.cert_req == 1) {
+ st->hand_state = TLS_ST_CW_CERT_VRFY;
+ } else {
st->hand_state = TLS_ST_CW_CHANGE;
- return WRITE_TRAN_CONTINUE;
+ }
+ if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
+ st->hand_state = TLS_ST_CW_CHANGE;
+ }
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CERT_VRFY:
+ st->hand_state = TLS_ST_CW_CHANGE;
+ return WRITE_TRAN_CONTINUE;
- case TLS_ST_CW_CHANGE:
+ case TLS_ST_CW_CHANGE:
#if defined(OPENSSL_NO_NEXTPROTONEG)
- st->hand_state = TLS_ST_CW_FINISHED;
+ st->
+ hand_state = TLS_ST_CW_FINISHED;
#else
- if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
- st->hand_state = TLS_ST_CW_NEXT_PROTO;
- else
- st->hand_state = TLS_ST_CW_FINISHED;
+ if (!SSL_IS_DTLS(s) && s->s3->npn_seen)
+ st->hand_state = TLS_ST_CW_NEXT_PROTO;
+ else
+ st->hand_state = TLS_ST_CW_FINISHED;
#endif
- return WRITE_TRAN_CONTINUE;
+ return WRITE_TRAN_CONTINUE;
#if !defined(OPENSSL_NO_NEXTPROTONEG)
- case TLS_ST_CW_NEXT_PROTO:
- st->hand_state = TLS_ST_CW_FINISHED;
- return WRITE_TRAN_CONTINUE;
+ case TLS_ST_CW_NEXT_PROTO:
+ st->hand_state = TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
#endif
- case TLS_ST_CW_FINISHED:
- if (s->hit) {
- st->hand_state = TLS_ST_OK;
- ossl_statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
- } else {
- return WRITE_TRAN_FINISHED;
- }
+ case TLS_ST_CW_FINISHED:
+ if (s->hit) {
+ st->hand_state = TLS_ST_OK;
+ return WRITE_TRAN_CONTINUE;
+ } else {
+ return WRITE_TRAN_FINISHED;
+ }
- case TLS_ST_CR_FINISHED:
- if (s->hit) {
- st->hand_state = TLS_ST_CW_CHANGE;
- return WRITE_TRAN_CONTINUE;
- } else {
- st->hand_state = TLS_ST_OK;
- ossl_statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
- }
+ case TLS_ST_CR_FINISHED:
+ if (s->hit) {
+ st->hand_state = TLS_ST_CW_CHANGE;
+ return WRITE_TRAN_CONTINUE;
+ } else {
+ st->hand_state = TLS_ST_OK;
+ return WRITE_TRAN_CONTINUE;
+ }
- default:
- /* Shouldn't happen */
- return WRITE_TRAN_ERROR;
+ case TLS_ST_CR_HELLO_REQ:
+ /*
+ * If we can renegotiate now then do so, otherwise wait for a more
+ * convenient time.
+ */
+ if (ssl3_renegotiate_check(s, 1)) {
+ if (!tls_setup_handshake(s)) {
+ ossl_statem_set_error(s);
+ return WRITE_TRAN_ERROR;
+ }
+ st->hand_state = TLS_ST_CW_CLNT_HELLO;
+ return WRITE_TRAN_CONTINUE;
+ }
+ st->hand_state = TLS_ST_OK;
+ return WRITE_TRAN_CONTINUE;
}
}
{
OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
+ switch (st->hand_state) {
+ default:
+ /* No pre work to be done */
+ break;
+
case TLS_ST_CW_CLNT_HELLO:
s->shutdown = 0;
if (SSL_IS_DTLS(s)) {
/* every DTLS ClientHello resets Finished MAC */
- ssl3_init_finished_mac(s);
+ if (!ssl3_init_finished_mac(s)) {
+ ossl_statem_set_error(s);
+ return WORK_ERROR;
+ }
}
break;
- case TLS_ST_CW_CERT:
- return tls_prepare_client_certificate(s, wst);
-
case TLS_ST_CW_CHANGE:
if (SSL_IS_DTLS(s)) {
if (s->hit) {
return dtls_wait_for_dry(s);
#endif
}
- return WORK_FINISHED_CONTINUE;
+ break;
+ case TLS_ST_PENDING_EARLY_DATA_END:
+ /*
+ * If we've been called by SSL_do_handshake()/SSL_write(), or we did not
+ * attempt to write early data before calling SSL_read() then we press
+ * on with the handshake. Otherwise we pause here.
+ */
+ if (s->early_data_state == SSL_EARLY_DATA_FINISHED_WRITING
+ || s->early_data_state == SSL_EARLY_DATA_NONE)
+ return WORK_FINISHED_CONTINUE;
+ /* Fall through */
+
+ case TLS_ST_EARLY_DATA:
case TLS_ST_OK:
- return tls_finish_handshake(s, wst);
-
- default:
- /* No pre work to be done */
- break;
- }
+ return tls_finish_handshake(s, wst, 1);
+ }
return WORK_FINISHED_CONTINUE;
}
s->init_num = 0;
- switch(st->hand_state) {
+ switch (st->hand_state) {
+ default:
+ /* No post work to be done */
+ break;
+
case TLS_ST_CW_CLNT_HELLO:
- if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1)
+ if (wst == WORK_MORE_A && statem_flush(s) != 1)
return WORK_MORE_A;
-#ifndef OPENSSL_NO_SCTP
- /* Disable buffering for SCTP */
- if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) {
-#endif
- /*
- * turn on buffering for the next lot of output
- */
- if (s->bbio != s->wbio)
- s->wbio = BIO_push(s->bbio, s->wbio);
-#ifndef OPENSSL_NO_SCTP
- }
-#endif
+
if (SSL_IS_DTLS(s)) {
/* Treat the next message as the first packet */
s->first_packet = 1;
}
+
+ if (s->early_data_state == SSL_EARLY_DATA_CONNECTING
+ && s->max_early_data > 0) {
+ /*
+ * We haven't selected TLSv1.3 yet so we don't call the change
+ * cipher state function associated with the SSL_METHOD. Instead
+ * we call tls13_change_cipher_state() directly.
+ */
+ if (!tls13_change_cipher_state(s,
+ SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE))
+ return WORK_ERROR;
+ }
+ break;
+
+ case TLS_ST_CW_END_OF_EARLY_DATA:
+ /*
+ * We set the enc_write_ctx back to NULL because we may end up writing
+ * in cleartext again if we get a HelloRetryRequest from the server.
+ */
+ EVP_CIPHER_CTX_free(s->enc_write_ctx);
+ s->enc_write_ctx = NULL;
break;
case TLS_ST_CW_KEY_EXCH:
#endif
if (statem_flush(s) != 1)
return WORK_MORE_B;
+
+ if (SSL_IS_TLS13(s)) {
+ if (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE))
+ return WORK_ERROR;
+ }
break;
- default:
- /* No post work to be done */
+ case TLS_ST_CW_KEY_UPDATE:
+ if (statem_flush(s) != 1)
+ return WORK_MORE_A;
+ if (!tls13_update_key(s, 1))
+ return WORK_ERROR;
break;
}
}
/*
- * Construct a message to be sent from the client to the server.
+ * Get the message construction function and message type for sending from the
+ * client
*
* Valid return values are:
* 1: Success
* 0: Error
*/
-int ossl_statem_client_construct_message(SSL *s)
+int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
+ confunc_f *confunc, int *mt)
{
OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
+ switch (st->hand_state) {
+ default:
+ /* Shouldn't happen */
+ return 0;
+
+ case TLS_ST_CW_CHANGE:
+ if (SSL_IS_DTLS(s))
+ *confunc = dtls_construct_change_cipher_spec;
+ else
+ *confunc = tls_construct_change_cipher_spec;
+ *mt = SSL3_MT_CHANGE_CIPHER_SPEC;
+ break;
+
case TLS_ST_CW_CLNT_HELLO:
- return tls_construct_client_hello(s);
+ *confunc = tls_construct_client_hello;
+ *mt = SSL3_MT_CLIENT_HELLO;
+ break;
+
+ case TLS_ST_CW_END_OF_EARLY_DATA:
+ *confunc = tls_construct_end_of_early_data;
+ *mt = SSL3_MT_END_OF_EARLY_DATA;
+ break;
+
+ case TLS_ST_PENDING_EARLY_DATA_END:
+ *confunc = NULL;
+ *mt = SSL3_MT_DUMMY;
+ break;
case TLS_ST_CW_CERT:
- return tls_construct_client_certificate(s);
+ *confunc = tls_construct_client_certificate;
+ *mt = SSL3_MT_CERTIFICATE;
+ break;
case TLS_ST_CW_KEY_EXCH:
- return tls_construct_client_key_exchange(s);
+ *confunc = tls_construct_client_key_exchange;
+ *mt = SSL3_MT_CLIENT_KEY_EXCHANGE;
+ break;
case TLS_ST_CW_CERT_VRFY:
- return tls_construct_client_verify(s);
-
- case TLS_ST_CW_CHANGE:
- if (SSL_IS_DTLS(s))
- return dtls_construct_change_cipher_spec(s);
- else
- return tls_construct_change_cipher_spec(s);
+ *confunc = tls_construct_cert_verify;
+ *mt = SSL3_MT_CERTIFICATE_VERIFY;
+ break;
#if !defined(OPENSSL_NO_NEXTPROTONEG)
case TLS_ST_CW_NEXT_PROTO:
- return tls_construct_next_proto(s);
+ *confunc = tls_construct_next_proto;
+ *mt = SSL3_MT_NEXT_PROTO;
+ break;
#endif
case TLS_ST_CW_FINISHED:
- return tls_construct_finished(s,
- s->method->
- ssl3_enc->client_finished_label,
- s->method->
- ssl3_enc->client_finished_label_len);
+ *confunc = tls_construct_finished;
+ *mt = SSL3_MT_FINISHED;
+ break;
- default:
- /* Shouldn't happen */
+ case TLS_ST_CW_KEY_UPDATE:
+ *confunc = tls_construct_key_update;
+ *mt = SSL3_MT_KEY_UPDATE;
break;
}
- return 0;
+ return 1;
}
/*
* Returns the maximum allowed length for the current message that we are
* reading. Excludes the message header.
*/
-unsigned long ossl_statem_client_max_message_size(SSL *s)
+size_t ossl_statem_client_max_message_size(SSL *s)
{
OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_CR_SRVR_HELLO:
- return SERVER_HELLO_MAX_LENGTH;
+ switch (st->hand_state) {
+ default:
+ /* Shouldn't happen */
+ return 0;
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- return HELLO_VERIFY_REQUEST_MAX_LENGTH;
+ case TLS_ST_CR_SRVR_HELLO:
+ return SERVER_HELLO_MAX_LENGTH;
- case TLS_ST_CR_CERT:
- return s->max_cert_list;
+ case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
+ return HELLO_VERIFY_REQUEST_MAX_LENGTH;
- case TLS_ST_CR_CERT_STATUS:
- return SSL3_RT_MAX_PLAIN_LENGTH;
+ case TLS_ST_CR_HELLO_RETRY_REQUEST:
+ return HELLO_RETRY_REQUEST_MAX_LENGTH;
- case TLS_ST_CR_KEY_EXCH:
- return SERVER_KEY_EXCH_MAX_LENGTH;
+ case TLS_ST_CR_CERT:
+ return s->max_cert_list;
- case TLS_ST_CR_CERT_REQ:
- /* Set to s->max_cert_list for compatibility with previous releases.
- * In practice these messages can get quite long if servers are
- * configured to provide a long list of acceptable CAs
- */
- return s->max_cert_list;
+ case TLS_ST_CR_CERT_VRFY:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
- case TLS_ST_CR_SRVR_DONE:
- return SERVER_HELLO_DONE_MAX_LENGTH;
+ case TLS_ST_CR_CERT_STATUS:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
- case TLS_ST_CR_CHANGE:
- return CCS_MAX_LENGTH;
+ case TLS_ST_CR_KEY_EXCH:
+ return SERVER_KEY_EXCH_MAX_LENGTH;
- case TLS_ST_CR_SESSION_TICKET:
- return SSL3_RT_MAX_PLAIN_LENGTH;
+ case TLS_ST_CR_CERT_REQ:
+ /*
+ * Set to s->max_cert_list for compatibility with previous releases. In
+ * practice these messages can get quite long if servers are configured
+ * to provide a long list of acceptable CAs
+ */
+ return s->max_cert_list;
- case TLS_ST_CR_FINISHED:
- return FINISHED_MAX_LENGTH;
+ case TLS_ST_CR_SRVR_DONE:
+ return SERVER_HELLO_DONE_MAX_LENGTH;
- default:
- /* Shouldn't happen */
- break;
- }
+ case TLS_ST_CR_CHANGE:
+ if (s->version == DTLS1_BAD_VER)
+ return 3;
+ return CCS_MAX_LENGTH;
- return 0;
+ case TLS_ST_CR_SESSION_TICKET:
+ return SSL3_RT_MAX_PLAIN_LENGTH;
+
+ case TLS_ST_CR_FINISHED:
+ return FINISHED_MAX_LENGTH;
+
+ case TLS_ST_CR_ENCRYPTED_EXTENSIONS:
+ return ENCRYPTED_EXTENSIONS_MAX_LENGTH;
+
+ case TLS_ST_CR_KEY_UPDATE:
+ return KEY_UPDATE_MAX_LENGTH;
+ }
}
/*
{
OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_CR_SRVR_HELLO:
- return tls_process_server_hello(s, pkt);
+ switch (st->hand_state) {
+ default:
+ /* Shouldn't happen */
+ return MSG_PROCESS_ERROR;
+
+ case TLS_ST_CR_SRVR_HELLO:
+ return tls_process_server_hello(s, pkt);
+
+ case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
+ return dtls_process_hello_verify(s, pkt);
+
+ case TLS_ST_CR_HELLO_RETRY_REQUEST:
+ return tls_process_hello_retry_request(s, pkt);
+
+ case TLS_ST_CR_CERT:
+ return tls_process_server_certificate(s, pkt);
+
+ case TLS_ST_CR_CERT_VRFY:
+ return tls_process_cert_verify(s, pkt);
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- return dtls_process_hello_verify(s, pkt);
+ case TLS_ST_CR_CERT_STATUS:
+ return tls_process_cert_status(s, pkt);
- case TLS_ST_CR_CERT:
- return tls_process_server_certificate(s, pkt);
+ case TLS_ST_CR_KEY_EXCH:
+ return tls_process_key_exchange(s, pkt);
- case TLS_ST_CR_CERT_STATUS:
- return tls_process_cert_status(s, pkt);
+ case TLS_ST_CR_CERT_REQ:
+ return tls_process_certificate_request(s, pkt);
- case TLS_ST_CR_KEY_EXCH:
- return tls_process_key_exchange(s, pkt);
+ case TLS_ST_CR_SRVR_DONE:
+ return tls_process_server_done(s, pkt);
- case TLS_ST_CR_CERT_REQ:
- return tls_process_certificate_request(s, pkt);
+ case TLS_ST_CR_CHANGE:
+ return tls_process_change_cipher_spec(s, pkt);
- case TLS_ST_CR_SRVR_DONE:
- return tls_process_server_done(s, pkt);
+ case TLS_ST_CR_SESSION_TICKET:
+ return tls_process_new_session_ticket(s, pkt);
- case TLS_ST_CR_CHANGE:
- return tls_process_change_cipher_spec(s, pkt);
+ case TLS_ST_CR_FINISHED:
+ return tls_process_finished(s, pkt);
- case TLS_ST_CR_SESSION_TICKET:
- return tls_process_new_session_ticket(s, pkt);
+ case TLS_ST_CR_HELLO_REQ:
+ return tls_process_hello_req(s, pkt);
- case TLS_ST_CR_FINISHED:
- return tls_process_finished(s, pkt);
+ case TLS_ST_CR_ENCRYPTED_EXTENSIONS:
+ return tls_process_encrypted_extensions(s, pkt);
- default:
- /* Shouldn't happen */
- break;
+ case TLS_ST_CR_KEY_UPDATE:
+ return tls_process_key_update(s, pkt);
}
-
- return MSG_PROCESS_ERROR;
}
/*
{
OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
+ switch (st->hand_state) {
+ default:
+ /* Shouldn't happen */
+ return WORK_ERROR;
+
+ case TLS_ST_CR_CERT_REQ:
+ return tls_prepare_client_certificate(s, wst);
+
#ifndef OPENSSL_NO_SCTP
case TLS_ST_CR_SRVR_DONE:
/* We only get here if we are using SCTP and we are renegotiating */
ossl_statem_set_sctp_read_sock(s, 0);
return WORK_FINISHED_STOP;
#endif
-
- default:
- break;
}
-
- /* Shouldn't happen */
- return WORK_ERROR;
}
-int tls_construct_client_hello(SSL *s)
+int tls_construct_client_hello(SSL *s, WPACKET *pkt)
{
- unsigned char *buf;
- unsigned char *p, *d;
- int i;
- int protverr;
- unsigned long l;
- int al = 0;
+ unsigned char *p;
+ size_t sess_id_len;
+ int i, protverr;
+ int al = SSL_AD_HANDSHAKE_FAILURE;
#ifndef OPENSSL_NO_COMP
- int j;
SSL_COMP *comp;
#endif
SSL_SESSION *sess = s->session;
- buf = (unsigned char *)s->init_buf->data;
+ if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) {
+ /* Should not happen */
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
/* Work out what SSL/TLS/DTLS version to use */
protverr = ssl_set_client_hello_version(s);
if (protverr != 0) {
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
- goto err;
+ return 0;
}
- if ((sess == NULL) ||
- !ssl_version_supported(s, sess->ssl_version) ||
+ if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) ||
/*
* In the case of EAP-FAST, we can have a pre-shared
* "ticket" without a session ID.
*/
- (!sess->session_id_length && !sess->tlsext_tick) ||
+ (!sess->session_id_length && !sess->ext.tick) ||
(sess->not_resumable)) {
if (!ssl_get_new_session(s, 0))
- goto err;
+ return 0;
}
/* else use the pre-loaded session */
} else
i = 1;
- if (i && ssl_fill_hello_random(s, 0, p,
- sizeof(s->s3->client_random)) <= 0)
- goto err;
-
- /* Do the message type and length last */
- d = p = ssl_handshake_start(s);
+ if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random),
+ DOWNGRADE_NONE) <= 0)
+ return 0;
/*-
* version indicates the negotiated version: for example from
* TLS 1.0 and renegotiating with TLS 1.2. We do this by using
* client_version in client hello and not resetting it to
* the negotiated version.
+ *
+ * For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the
+ * supported_versions extension for the real supported versions.
*/
- *(p++) = s->client_version >> 8;
- *(p++) = s->client_version & 0xff;
-
- /* Random stuff */
- memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
- p += SSL3_RANDOM_SIZE;
+ if (!WPACKET_put_bytes_u16(pkt, s->client_version)
+ || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
/* Session ID */
- if (s->new_session)
- i = 0;
+ if (s->new_session || s->session->ssl_version == TLS1_3_VERSION)
+ sess_id_len = 0;
else
- i = s->session->session_id_length;
- *(p++) = i;
- if (i != 0) {
- if (i > (int)sizeof(s->session->session_id)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- memcpy(p, s->session->session_id, i);
- p += i;
+ sess_id_len = s->session->session_id_length;
+ if (sess_id_len > sizeof(s->session->session_id)
+ || !WPACKET_start_sub_packet_u8(pkt)
+ || (sess_id_len != 0 && !WPACKET_memcpy(pkt, s->session->session_id,
+ sess_id_len))
+ || !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return 0;
}
/* cookie stuff for DTLS */
if (SSL_IS_DTLS(s)) {
- if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
+ if (s->d1->cookie_len > sizeof(s->d1->cookie)
+ || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie,
+ s->d1->cookie_len)) {
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
+ return 0;
}
- *(p++) = s->d1->cookie_len;
- memcpy(p, s->d1->cookie, s->d1->cookie_len);
- p += s->d1->cookie_len;
}
/* Ciphers supported */
- i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
- if (i == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
- goto err;
+ if (!WPACKET_start_sub_packet_u16(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */
+ if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt))
+ return 0;
+ if (!WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return 0;
}
-#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
- /*
- * Some servers hang if client hello > 256 bytes as hack workaround
- * chop number of supported ciphers to keep it well below this if we
- * use TLS v1.2
- */
- if (TLS1_get_version(s) >= TLS1_2_VERSION
- && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
- i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
-#endif
- s2n(i, p);
- p += i;
/* COMPRESSION */
-#ifdef OPENSSL_NO_COMP
- *(p++) = 1;
-#else
-
- if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
- j = 0;
- else
- j = sk_SSL_COMP_num(s->ctx->comp_methods);
- *(p++) = 1 + j;
- for (i = 0; i < j; i++) {
- comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
- *(p++) = comp->id;
+ if (!WPACKET_start_sub_packet_u8(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return 0;
}
-#endif
- *(p++) = 0; /* Add the NULL method */
-
- /* TLS extensions */
- if (ssl_prepare_clienthello_tlsext(s) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
- goto err;
+#ifndef OPENSSL_NO_COMP
+ if (ssl_allow_compression(s)
+ && s->ctx->comp_methods
+ && (SSL_IS_DTLS(s) || s->s3->tmp.max_ver < TLS1_3_VERSION)) {
+ int compnum = sk_SSL_COMP_num(s->ctx->comp_methods);
+ for (i = 0; i < compnum; i++) {
+ comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
+ if (!WPACKET_put_bytes_u8(pkt, comp->id)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
}
- if ((p =
- ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
- &al)) == NULL) {
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
+#endif
+ /* Add the NULL method */
+ if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
+ return 0;
}
- l = p - d;
- if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ /* TLS extensions */
+ if (!tls_construct_extensions(s, pkt, SSL_EXT_CLIENT_HELLO, NULL, 0, &al)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
+ return 0;
}
return 1;
- err:
- ossl_statem_set_error(s);
- return 0;
}
MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
{
int al;
- unsigned int cookie_len;
+ size_t cookie_len;
PACKET cookiepkt;
if (!PACKET_forward(pkt, 2)
- || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
+ || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
goto f_err;
return MSG_PROCESS_ERROR;
}
-MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
+static int set_client_ciphersuite(SSL *s, const unsigned char *cipherchars)
{
STACK_OF(SSL_CIPHER) *sk;
const SSL_CIPHER *c;
- PACKET session_id;
+ int i;
+
+ c = ssl_get_cipher_by_char(s, cipherchars, 0);
+ if (c == NULL) {
+ /* unknown cipher */
+ SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_UNKNOWN_CIPHER_RETURNED);
+ return 0;
+ }
+ /*
+ * If it is a disabled cipher we either didn't send it in client hello,
+ * or it's not allowed for the selected protocol. So we return an error.
+ */
+ if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
+ SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED);
+ return 0;
+ }
+
+ sk = ssl_get_ciphers_by_id(s);
+ i = sk_SSL_CIPHER_find(sk, c);
+ if (i < 0) {
+ /* we did not say we would use this cipher */
+ SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED);
+ return 0;
+ }
+
+ if (SSL_IS_TLS13(s) && s->s3->tmp.new_cipher != NULL
+ && s->s3->tmp.new_cipher->id != c->id) {
+ /* ServerHello selected a different ciphersuite to that in the HRR */
+ SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE, SSL_R_WRONG_CIPHER_RETURNED);
+ return 0;
+ }
+
+ /*
+ * Depending on the session caching (internal/external), the cipher
+ * and/or cipher_id values may not be set. Make sure that cipher_id is
+ * set and use it for comparison.
+ */
+ if (s->session->cipher != NULL)
+ s->session->cipher_id = s->session->cipher->id;
+ if (s->hit && (s->session->cipher_id != c->id)) {
+ SSLerr(SSL_F_SET_CLIENT_CIPHERSUITE,
+ SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
+ return 0;
+ }
+ s->s3->tmp.new_cipher = c;
+
+ return 1;
+}
+
+MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
+{
+ PACKET session_id, extpkt;
size_t session_id_len;
const unsigned char *cipherchars;
- int i, al = SSL_AD_INTERNAL_ERROR;
+ int al = SSL_AD_INTERNAL_ERROR;
unsigned int compression;
unsigned int sversion;
+ unsigned int context;
int protverr;
+ RAW_EXTENSION *extensions = NULL;
#ifndef OPENSSL_NO_COMP
SSL_COMP *comp;
#endif
goto f_err;
}
- protverr = ssl_choose_client_version(s, sversion);
- if (protverr != 0) {
- al = SSL_AD_PROTOCOL_VERSION;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
- goto f_err;
- }
-
- /* load the server hello data */
/* load the server random */
if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
al = SSL_AD_DECODE_ERROR;
goto f_err;
}
- s->hit = 0;
-
- /* Get the session-id. */
- if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ /*
+ * We do this immediately so we know what format the ServerHello is in.
+ * Must be done after reading the random data so we can check for the
+ * TLSv1.3 downgrade sentinels
+ */
+ protverr = ssl_choose_client_version(s, sversion, 1, &al);
+ if (protverr != 0) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
goto f_err;
}
- session_id_len = PACKET_remaining(&session_id);
- if (session_id_len > sizeof s->session->session_id
- || session_id_len > SSL3_SESSION_ID_SIZE) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
+
+ /*
+ * In TLSv1.3 a ServerHello message signals a key change so the end of the
+ * message must be on a record boundary.
+ */
+ if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_NOT_ON_RECORD_BOUNDARY);
goto f_err;
}
+ /* Get the session-id. */
+ if (!SSL_IS_TLS13(s)) {
+ if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+ session_id_len = PACKET_remaining(&session_id);
+ if (session_id_len > sizeof s->session->session_id
+ || session_id_len > SSL3_SESSION_ID_SIZE) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ SSL_R_SSL3_SESSION_ID_TOO_LONG);
+ goto f_err;
+ }
+ } else {
+ PACKET_null_init(&session_id);
+ session_id_len = 0;
+ }
+
if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
al = SSL_AD_DECODE_ERROR;
goto f_err;
}
- /*
- * Check if we can resume the session based on external pre-shared secret.
- * EAP-FAST (RFC 4851) supports two types of session resumption.
- * Resumption based on server-side state works with session IDs.
- * Resumption based on pre-shared Protected Access Credentials (PACs)
- * works by overriding the SessionTicket extension at the application
- * layer, and does not send a session ID. (We do not know whether EAP-FAST
- * servers would honour the session ID.) Therefore, the session ID alone
- * is not a reliable indicator of session resumption, so we first check if
- * we can resume, and later peek at the next handshake message to see if the
- * server wants to resume.
- */
- if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
- s->session->tlsext_tick) {
- const SSL_CIPHER *pref_cipher = NULL;
- s->session->master_key_length = sizeof(s->session->master_key);
- if (s->tls_session_secret_cb(s, s->session->master_key,
- &s->session->master_key_length,
- NULL, &pref_cipher,
- s->tls_session_secret_cb_arg)) {
- s->session->cipher = pref_cipher ?
- pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
- } else {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
- al = SSL_AD_INTERNAL_ERROR;
+ if (!SSL_IS_TLS13(s)) {
+ if (!PACKET_get_1(pkt, &compression)) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
goto f_err;
}
+ } else {
+ compression = 0;
}
- if (session_id_len != 0 && session_id_len == s->session->session_id_length
- && memcmp(PACKET_data(&session_id), s->session->session_id,
- session_id_len) == 0) {
- if (s->sid_ctx_length != s->session->sid_ctx_length
- || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
- /* actually a client application bug */
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
+ /* TLS extensions */
+ if (PACKET_remaining(pkt) == 0) {
+ PACKET_null_init(&extpkt);
+ } else if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_LENGTH);
+ goto f_err;
+ }
+
+ context = SSL_IS_TLS13(s) ? SSL_EXT_TLS1_3_SERVER_HELLO
+ : SSL_EXT_TLS1_2_SERVER_HELLO;
+ if (!tls_collect_extensions(s, &extpkt, context, &extensions, &al, NULL))
+ goto f_err;
+
+ s->hit = 0;
+
+ if (SSL_IS_TLS13(s)) {
+ /* This will set s->hit if we are resuming */
+ if (!tls_parse_extension(s, TLSEXT_IDX_psk,
+ SSL_EXT_TLS1_3_SERVER_HELLO,
+ extensions, NULL, 0, &al))
+ goto f_err;
+ } else {
+ /*
+ * Check if we can resume the session based on external pre-shared
+ * secret. EAP-FAST (RFC 4851) supports two types of session resumption.
+ * Resumption based on server-side state works with session IDs.
+ * Resumption based on pre-shared Protected Access Credentials (PACs)
+ * works by overriding the SessionTicket extension at the application
+ * layer, and does not send a session ID. (We do not know whether
+ * EAP-FAST servers would honour the session ID.) Therefore, the session
+ * ID alone is not a reliable indicator of session resumption, so we
+ * first check if we can resume, and later peek at the next handshake
+ * message to see if the server wants to resume.
+ */
+ if (s->version >= TLS1_VERSION
+ && s->ext.session_secret_cb != NULL && s->session->ext.tick) {
+ const SSL_CIPHER *pref_cipher = NULL;
+ /*
+ * s->session->master_key_length is a size_t, but this is an int for
+ * backwards compat reasons
+ */
+ int master_key_length;
+ master_key_length = sizeof(s->session->master_key);
+ if (s->ext.session_secret_cb(s, s->session->master_key,
+ &master_key_length,
+ NULL, &pref_cipher,
+ s->ext.session_secret_cb_arg)
+ && master_key_length > 0) {
+ s->session->master_key_length = master_key_length;
+ s->session->cipher = pref_cipher ?
+ pref_cipher : ssl_get_cipher_by_char(s, cipherchars, 0);
+ } else {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+ }
+
+ if (session_id_len != 0
+ && session_id_len == s->session->session_id_length
+ && memcmp(PACKET_data(&session_id), s->session->session_id,
+ session_id_len) == 0)
+ s->hit = 1;
+ }
+
+ if (s->hit) {
+ if (s->sid_ctx_length != s->session->sid_ctx_length
+ || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
+ /* actually a client application bug */
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
goto f_err;
}
- s->hit = 1;
} else {
/*
* If we were trying for session-id reuse but the server
- * didn't echo the ID, make a new SSL_SESSION.
+ * didn't resume, make a new SSL_SESSION.
* In the case of EAP-FAST and PAC, we do not send a session ID,
* so the PAC-based session secret is always preserved. It'll be
* overwritten if the server refuses resumption.
*/
- if (s->session->session_id_length > 0) {
+ if (s->session->session_id_length > 0
+ || (SSL_IS_TLS13(s)
+ && s->session->ext.tick_identity
+ != TLSEXT_PSK_BAD_IDENTITY)) {
+ s->ctx->stats.sess_miss++;
if (!ssl_get_new_session(s, 0)) {
goto f_err;
}
s->session->ssl_version = s->version;
s->session->session_id_length = session_id_len;
/* session_id_len could be 0 */
- memcpy(s->session->session_id, PACKET_data(&session_id),
- session_id_len);
+ if (session_id_len > 0)
+ memcpy(s->session->session_id, PACKET_data(&session_id),
+ session_id_len);
}
/* Session version and negotiated protocol version should match */
SSL_R_SSL_SESSION_VERSION_MISMATCH);
goto f_err;
}
-
- c = ssl_get_cipher_by_char(s, cipherchars);
- if (c == NULL) {
- /* unknown cipher */
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
- goto f_err;
- }
/*
* Now that we know the version, update the check to see if it's an allowed
* version.
*/
s->s3->tmp.min_ver = s->version;
s->s3->tmp.max_ver = s->version;
- /*
- * If it is a disabled cipher we either didn't send it in client hello,
- * or it's not allowed for the selected protocol. So we return an error.
- */
- if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
- goto f_err;
- }
- sk = ssl_get_ciphers_by_id(s);
- i = sk_SSL_CIPHER_find(sk, c);
- if (i < 0) {
- /* we did not say we would use this cipher */
+ if (!set_client_ciphersuite(s, cipherchars)) {
al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
goto f_err;
}
- /*
- * Depending on the session caching (internal/external), the cipher
- * and/or cipher_id values may not be set. Make sure that cipher_id is
- * set and use it for comparison.
- */
- if (s->session->cipher)
- s->session->cipher_id = s->session->cipher->id;
- if (s->hit && (s->session->cipher_id != c->id)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
- goto f_err;
- }
- s->s3->tmp.new_cipher = c;
- /* lets get the compression algorithm */
- /* COMPRESSION */
- if (!PACKET_get_1(pkt, &compression)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
#ifdef OPENSSL_NO_COMP
if (compression != 0) {
al = SSL_AD_ILLEGAL_PARAMETER;
}
#endif
- /* TLS extensions */
- if (!ssl_parse_serverhello_tlsext(s, pkt)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
- goto err;
- }
-
- if (PACKET_remaining(pkt) != 0) {
- /* wrong packet length */
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
+ if (!tls_parse_all_extensions(s, context, extensions, NULL, 0, &al))
goto f_err;
- }
#ifndef OPENSSL_NO_SCTP
if (SSL_IS_DTLS(s) && s->hit) {
sizeof(DTLS1_SCTP_AUTH_LABEL));
if (SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey),
- labelbuffer,
- sizeof(labelbuffer), NULL, 0,
- 0) <= 0)
- goto err;
+ sizeof(sctpauthkey),
+ labelbuffer,
+ sizeof(labelbuffer), NULL, 0, 0) <= 0)
+ goto f_err;
BIO_ctrl(SSL_get_wbio(s),
BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
}
#endif
+ /*
+ * In TLSv1.3 we have some post-processing to change cipher state, otherwise
+ * we're done with this message
+ */
+ if (SSL_IS_TLS13(s)
+ && (!s->method->ssl3_enc->setup_key_block(s)
+ || !s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER);
+ goto f_err;
+ }
+
+ OPENSSL_free(extensions);
return MSG_PROCESS_CONTINUE_READING;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
ossl_statem_set_error(s);
+ OPENSSL_free(extensions);
+ return MSG_PROCESS_ERROR;
+}
+
+static MSG_PROCESS_RETURN tls_process_hello_retry_request(SSL *s, PACKET *pkt)
+{
+ unsigned int sversion;
+ int errorcode;
+ const unsigned char *cipherchars;
+ RAW_EXTENSION *extensions = NULL;
+ int al;
+ PACKET extpkt;
+
+ if (!PACKET_get_net_2(pkt, &sversion)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH);
+ goto f_err;
+ }
+
+ s->hello_retry_request = 1;
+
+ /* This will fail if it doesn't choose TLSv1.3+ */
+ errorcode = ssl_choose_client_version(s, sversion, 0, &al);
+ if (errorcode != 0) {
+ SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, errorcode);
+ goto f_err;
+ }
+
+ if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
+ SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ if (!set_client_ciphersuite(s, cipherchars)) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ goto f_err;
+ }
+
+ if (!PACKET_as_length_prefixed_2(pkt, &extpkt)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, SSL_R_BAD_LENGTH);
+ goto f_err;
+ }
+
+ if (!tls_collect_extensions(s, &extpkt, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST,
+ &extensions, &al, NULL)
+ || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST,
+ extensions, NULL, 0, &al))
+ goto f_err;
+
+ OPENSSL_free(extensions);
+
+ /*
+ * Re-initialise the Transcript Hash. We're going to prepopulate it with
+ * a synthetic message_hash in place of ClientHello1.
+ */
+ if (!create_synthetic_message_hash(s)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+
+ /*
+ * Add this message to the Transcript Hash. Normally this is done
+ * automatically prior to the message processing stage. However due to the
+ * need to create the synthetic message hash, we defer that step until now
+ * for HRR messages.
+ */
+ if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
+ s->init_num + SSL3_HM_HEADER_LENGTH)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_HELLO_RETRY_REQUEST, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+
+ return MSG_PROCESS_FINISHED_READING;
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ ossl_statem_set_error(s);
+ OPENSSL_free(extensions);
return MSG_PROCESS_ERROR;
}
const unsigned char *certstart, *certbytes;
STACK_OF(X509) *sk = NULL;
EVP_PKEY *pkey = NULL;
+ size_t chainidx;
+ unsigned int context = 0;
if ((sk = sk_X509_new_null()) == NULL) {
SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
goto err;
}
- if (!PACKET_get_net_3(pkt, &cert_list_len)
+ if ((SSL_IS_TLS13(s) && !PACKET_get_1(pkt, &context))
+ || context != 0
+ || !PACKET_get_net_3(pkt, &cert_list_len)
|| PACKET_remaining(pkt) != cert_list_len) {
al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
goto f_err;
}
- while (PACKET_remaining(pkt)) {
+ for (chainidx = 0; PACKET_remaining(pkt); chainidx++) {
if (!PACKET_get_net_3(pkt, &cert_len)
- || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
+ || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
SSL_R_CERT_LENGTH_MISMATCH);
SSL_R_CERT_LENGTH_MISMATCH);
goto f_err;
}
+
+ if (SSL_IS_TLS13(s)) {
+ RAW_EXTENSION *rawexts = NULL;
+ PACKET extensions;
+
+ if (!PACKET_get_length_prefixed_2(pkt, &extensions)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_BAD_LENGTH);
+ goto f_err;
+ }
+ if (!tls_collect_extensions(s, &extensions,
+ SSL_EXT_TLS1_3_CERTIFICATE, &rawexts,
+ &al, NULL)
+ || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE,
+ rawexts, x, chainidx, &al)) {
+ OPENSSL_free(rawexts);
+ goto f_err;
+ }
+ OPENSSL_free(rawexts);
+ }
+
if (!sk_X509_push(sk, x)) {
SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
goto err;
}
i = ssl_verify_cert_chain(s, sk);
- if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) {
+ /*
+ * The documented interface is that SSL_VERIFY_PEER should be set in order
+ * for client side verification of the server certificate to take place.
+ * However, historically the code has only checked that *any* flag is set
+ * to cause server verification to take place. Use of the other flags makes
+ * no sense in client mode. An attempt to clean up the semantics was
+ * reverted because at least one application *only* set
+ * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused
+ * server verification to take place, after the clean up it silently did
+ * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags
+ * sent to them because they are void functions. Therefore, we now use the
+ * (less clean) historic behaviour of performing validation if any flag is
+ * set. The *documented* interface remains the same.
+ */
+ if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
al = ssl_verify_alarm_type(s->verify_result);
SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
SSL_R_CERTIFICATE_VERIFY_FAILED);
SSL_R_UNKNOWN_CERTIFICATE_TYPE);
goto f_err;
}
-
- exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
- if (exp_idx >= 0 && i != exp_idx
+ /*
+ * Check certificate type is consistent with ciphersuite. For TLS 1.3
+ * skip check since TLS 1.3 ciphersuites can be used with any certificate
+ * type.
+ */
+ if (!SSL_IS_TLS13(s)) {
+ exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
+ if (exp_idx >= 0 && i != exp_idx
&& (exp_idx != SSL_PKEY_GOST_EC ||
(i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
&& i != SSL_PKEY_GOST01))) {
- x = NULL;
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_WRONG_CERTIFICATE_TYPE);
- goto f_err;
+ x = NULL;
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
+ SSL_R_WRONG_CERTIFICATE_TYPE);
+ goto f_err;
+ }
}
s->session->peer_type = i;
X509_up_ref(x);
s->session->peer = x;
s->session->verify_result = s->verify_result;
-
x = NULL;
+
+ /* Save the current hash state for when we receive the CertificateVerify */
+ if (SSL_IS_TLS13(s)
+ && !ssl_handshake_hash(s, s->cert_verify_hash,
+ sizeof(s->cert_verify_hash),
+ &s->cert_verify_hash_len)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+
ret = MSG_PROCESS_CONTINUE_READING;
goto done;
return ret;
}
-MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
+static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
{
- EVP_MD_CTX *md_ctx;
- int al, j;
- long alg_k, alg_a;
- EVP_PKEY *pkey = NULL;
- const EVP_MD *md = NULL;
-#ifndef OPENSSL_NO_RSA
- RSA *rsa = NULL;
-#endif
-#ifndef OPENSSL_NO_EC
- EVP_PKEY_CTX *pctx = NULL;
-#endif
- PACKET save_param_start, signature;
-
- md_ctx = EVP_MD_CTX_new();
- if (md_ctx == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
-
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-
- save_param_start = *pkt;
-
-#if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
- EVP_PKEY_free(s->s3->peer_tmp);
- s->s3->peer_tmp = NULL;
-#endif
-
- alg_a = s->s3->tmp.new_cipher->algorithm_auth;
-
- al = SSL_AD_DECODE_ERROR;
-
#ifndef OPENSSL_NO_PSK
- /* PSK ciphersuites are preceded by an identity hint */
- if (alg_k & SSL_PSK) {
- PACKET psk_identity_hint;
- if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
+ PACKET psk_identity_hint;
- /*
- * Store PSK identity hint for later use, hint is used in
- * ssl3_send_client_key_exchange. Assume that the maximum length of
- * a PSK identity hint can be as long as the maximum length of a PSK
- * identity.
- */
- if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
- goto f_err;
- }
+ /* PSK ciphersuites are preceded by an identity hint */
- if (PACKET_remaining(&psk_identity_hint) == 0) {
- OPENSSL_free(s->session->psk_identity_hint);
- s->session->psk_identity_hint = NULL;
- } else if (!PACKET_strndup(&psk_identity_hint,
- &s->session->psk_identity_hint)) {
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
+ if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
+ return 0;
}
- /* Nothing else to do for plain PSK or RSAPSK */
- if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
- } else
-#endif /* !OPENSSL_NO_PSK */
/*
- * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_*
- * options
+ * Store PSK identity hint for later use, hint is used in
+ * tls_construct_client_key_exchange. Assume that the maximum length of
+ * a PSK identity hint can be as long as the maximum length of a PSK
+ * identity.
*/
- if (0) {
+ if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
+ return 0;
}
-#ifndef OPENSSL_NO_SRP
- else if (alg_k & SSL_kSRP) {
- PACKET prime, generator, salt, server_pub;
- if (!PACKET_get_length_prefixed_2(pkt, &prime)
- || !PACKET_get_length_prefixed_2(pkt, &generator)
- || !PACKET_get_length_prefixed_1(pkt, &salt)
- || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- if ((s->srp_ctx.N =
- BN_bin2bn(PACKET_data(&prime),
- PACKET_remaining(&prime), NULL)) == NULL
- || (s->srp_ctx.g =
- BN_bin2bn(PACKET_data(&generator),
- PACKET_remaining(&generator), NULL)) == NULL
- || (s->srp_ctx.s =
- BN_bin2bn(PACKET_data(&salt),
- PACKET_remaining(&salt), NULL)) == NULL
- || (s->srp_ctx.B =
- BN_bin2bn(PACKET_data(&server_pub),
- PACKET_remaining(&server_pub), NULL)) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto err;
- }
+ if (PACKET_remaining(&psk_identity_hint) == 0) {
+ OPENSSL_free(s->session->psk_identity_hint);
+ s->session->psk_identity_hint = NULL;
+ } else if (!PACKET_strndup(&psk_identity_hint,
+ &s->session->psk_identity_hint)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+ }
- if (!srp_verify_server_param(s, &al)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
- goto f_err;
- }
+ return 1;
+#else
+ SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+#endif
+}
-/* We must check if there is a certificate */
- if (alg_a & (SSL_aRSA|SSL_aDSS))
- pkey = X509_get0_pubkey(s->session->peer);
+static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
+{
+#ifndef OPENSSL_NO_SRP
+ PACKET prime, generator, salt, server_pub;
+
+ if (!PACKET_get_length_prefixed_2(pkt, &prime)
+ || !PACKET_get_length_prefixed_2(pkt, &generator)
+ || !PACKET_get_length_prefixed_1(pkt, &salt)
+ || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
+ return 0;
}
-#endif /* !OPENSSL_NO_SRP */
-#ifndef OPENSSL_NO_DH
- else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
- PACKET prime, generator, pub_key;
- EVP_PKEY *peer_tmp = NULL;
-
- DH *dh = NULL;
- BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
- if (!PACKET_get_length_prefixed_2(pkt, &prime)
- || !PACKET_get_length_prefixed_2(pkt, &generator)
- || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
+ /* TODO(size_t): Convert BN_bin2bn() calls */
+ if ((s->srp_ctx.N =
+ BN_bin2bn(PACKET_data(&prime),
+ (int)PACKET_remaining(&prime), NULL)) == NULL
+ || (s->srp_ctx.g =
+ BN_bin2bn(PACKET_data(&generator),
+ (int)PACKET_remaining(&generator), NULL)) == NULL
+ || (s->srp_ctx.s =
+ BN_bin2bn(PACKET_data(&salt),
+ (int)PACKET_remaining(&salt), NULL)) == NULL
+ || (s->srp_ctx.B =
+ BN_bin2bn(PACKET_data(&server_pub),
+ (int)PACKET_remaining(&server_pub), NULL)) == NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
+ return 0;
+ }
- peer_tmp = EVP_PKEY_new();
- dh = DH_new();
+ if (!srp_verify_server_param(s, al)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
+ return 0;
+ }
- if (peer_tmp == NULL || dh == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto dherr;
- }
+ /* We must check if there is a certificate */
+ if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
+ *pkey = X509_get0_pubkey(s->session->peer);
- p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
- g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator),
- NULL);
- bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
- NULL);
- if (p == NULL || g == NULL || bnpub_key == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto dherr;
- }
+ return 1;
+#else
+ SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+#endif
+}
- if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
- goto dherr;
- }
+static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
+{
+#ifndef OPENSSL_NO_DH
+ PACKET prime, generator, pub_key;
+ EVP_PKEY *peer_tmp = NULL;
- if (!DH_set0_pqg(dh, p, NULL, g)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto dherr;
- }
+ DH *dh = NULL;
+ BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
- if (!DH_set0_key(dh, bnpub_key, NULL)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto dherr;
- }
+ int check_bits = 0;
- if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
- goto dherr;
- }
+ if (!PACKET_get_length_prefixed_2(pkt, &prime)
+ || !PACKET_get_length_prefixed_2(pkt, &generator)
+ || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
+ return 0;
+ }
- if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
- goto dherr;
- }
+ peer_tmp = EVP_PKEY_new();
+ dh = DH_new();
- s->s3->peer_tmp = peer_tmp;
+ if (peer_tmp == NULL || dh == NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
- goto dhend;
- dherr:
- BN_free(p);
- BN_free(g);
- BN_free(bnpub_key);
- DH_free(dh);
- EVP_PKEY_free(peer_tmp);
- goto f_err;
- dhend:
- /*
- * FIXME: This makes assumptions about which ciphersuites come with
- * public keys. We should have a less ad-hoc way of doing this
- */
- if (alg_a & (SSL_aRSA|SSL_aDSS))
- pkey = X509_get0_pubkey(s->session->peer);
- /* else anonymous DH, so no certificate or pkey. */
+ /* TODO(size_t): Convert these calls */
+ p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL);
+ g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator),
+ NULL);
+ bnpub_key = BN_bin2bn(PACKET_data(&pub_key),
+ (int)PACKET_remaining(&pub_key), NULL);
+ if (p == NULL || g == NULL || bnpub_key == NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
+ goto err;
}
-#endif /* !OPENSSL_NO_DH */
-#ifndef OPENSSL_NO_EC
- else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
- PACKET encoded_pt;
- const unsigned char *ecparams;
- int curve_nid;
+ /* test non-zero pubkey */
+ if (BN_is_zero(bnpub_key)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
+ goto err;
+ }
- /*
- * Extract elliptic curve parameters and the server's ephemeral ECDH
- * public key. For now we only support named (not generic) curves and
- * ECParameters in this case is just three bytes.
- */
- if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
- }
- /*
- * Check curve is one of our preferences, if not server has sent an
- * invalid curve. ECParameters is 3 bytes.
- */
- if (!tls1_check_curve(s, ecparams, 3)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
- goto f_err;
- }
+ if (!DH_set0_pqg(dh, p, NULL, g)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
+ goto err;
+ }
+ p = g = NULL;
- curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2));
- if (curve_nid == 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
- SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
- goto f_err;
- }
+ if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
+ goto err;
+ }
+
+ if (!DH_set0_key(dh, bnpub_key, NULL)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
+ goto err;
+ }
+ bnpub_key = NULL;
+
+ if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
+ goto err;
+ }
+
+ if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
+ goto err;
+ }
+
+ s->s3->peer_tmp = peer_tmp;
+
+ /*
+ * FIXME: This makes assumptions about which ciphersuites come with
+ * public keys. We should have a less ad-hoc way of doing this
+ */
+ if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
+ *pkey = X509_get0_pubkey(s->session->peer);
+ /* else anonymous DH, so no certificate or pkey. */
+
+ return 1;
+
+ err:
+ BN_free(p);
+ BN_free(g);
+ BN_free(bnpub_key);
+ DH_free(dh);
+ EVP_PKEY_free(peer_tmp);
+
+ return 0;
+#else
+ SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+#endif
+}
+
+static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
+{
+#ifndef OPENSSL_NO_EC
+ PACKET encoded_pt;
+ const unsigned char *ecparams;
+ int curve_nid;
+ unsigned int curve_flags;
+ EVP_PKEY_CTX *pctx = NULL;
+
+ /*
+ * Extract elliptic curve parameters and the server's ephemeral ECDH
+ * public key. For now we only support named (not generic) curves and
+ * ECParameters in this case is just three bytes.
+ */
+ if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
+ return 0;
+ }
+ /*
+ * Check curve is one of our preferences, if not server has sent an
+ * invalid curve. ECParameters is 3 bytes.
+ */
+ if (!tls1_check_curve(s, ecparams, 3)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
+ return 0;
+ }
+
+ curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
+
+ if (curve_nid == 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
+ SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
+ return 0;
+ }
+
+ if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
+ EVP_PKEY *key = EVP_PKEY_new();
+ if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
+ EVP_PKEY_free(key);
+ return 0;
+ }
+ s->s3->peer_tmp = key;
+ } else {
/* Set up EVP_PKEY with named curve as parameters */
pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
if (pctx == NULL
|| EVP_PKEY_paramgen_init(pctx) <= 0
|| EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
|| EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
- goto f_err;
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
+ EVP_PKEY_CTX_free(pctx);
+ return 0;
}
EVP_PKEY_CTX_free(pctx);
pctx = NULL;
+ }
- if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
+ if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
+ return 0;
+ }
- if (EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(s->s3->peer_tmp),
- PACKET_data(&encoded_pt),
- PACKET_remaining(&encoded_pt), NULL) == 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
- goto f_err;
- }
+ if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
+ PACKET_data(&encoded_pt),
+ PACKET_remaining(&encoded_pt))) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
+ return 0;
+ }
- /*
- * The ECC/TLS specification does not mention the use of DSA to sign
- * ECParameters in the server key exchange message. We do support RSA
- * and ECDSA.
- */
- if (0) ;
-# ifndef OPENSSL_NO_RSA
- else if (alg_a & SSL_aRSA)
- pkey = X509_get0_pubkey(s->session->peer);
-# endif
-# ifndef OPENSSL_NO_EC
- else if (alg_a & SSL_aECDSA)
- pkey = X509_get0_pubkey(s->session->peer);
-# endif
- /* else anonymous ECDH, so no certificate or pkey. */
+ /*
+ * The ECC/TLS specification does not mention the use of DSA to sign
+ * ECParameters in the server key exchange message. We do support RSA
+ * and ECDSA.
+ */
+ if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
+ *pkey = X509_get0_pubkey(s->session->peer);
+ else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
+ *pkey = X509_get0_pubkey(s->session->peer);
+ /* else anonymous ECDH, so no certificate or pkey. */
+
+ return 1;
+#else
+ SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+#endif
+}
+
+MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
+{
+ int al = -1;
+ long alg_k;
+ EVP_PKEY *pkey = NULL;
+ EVP_MD_CTX *md_ctx = NULL;
+ EVP_PKEY_CTX *pctx = NULL;
+ PACKET save_param_start, signature;
+
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+
+ save_param_start = *pkt;
+
+#if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
+ EVP_PKEY_free(s->s3->peer_tmp);
+ s->s3->peer_tmp = NULL;
+#endif
+
+ if (alg_k & SSL_PSK) {
+ if (!tls_process_ske_psk_preamble(s, pkt, &al))
+ goto err;
+ }
+
+ /* Nothing else to do for plain PSK or RSAPSK */
+ if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
+ } else if (alg_k & SSL_kSRP) {
+ if (!tls_process_ske_srp(s, pkt, &pkey, &al))
+ goto err;
+ } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
+ if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
+ goto err;
+ } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
+ if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
+ goto err;
} else if (alg_k) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
+ goto err;
}
-#endif /* !OPENSSL_NO_EC */
/* if it was signed, check the signature */
if (pkey != NULL) {
PACKET params;
+ int maxsig;
+ const EVP_MD *md = NULL;
+
/*
* |pkt| now points to the beginning of the signature, so the difference
* equals the length of the parameters.
PACKET_remaining(pkt))) {
al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
+ goto err;
}
if (SSL_USE_SIGALGS(s)) {
- const unsigned char *sigalgs;
+ unsigned int sigalg;
int rv;
- if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
+
+ if (!PACKET_get_net_2(pkt, &sigalg)) {
+ al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
+ goto err;
}
- rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
- if (rv == -1)
+ rv = tls12_check_peer_sigalg(s, sigalg, pkey);
+ if (rv == -1) {
+ al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ } else if (rv == 0) {
+ al = SSL_AD_DECODE_ERROR;
goto err;
- else if (rv == 0) {
- goto f_err;
}
#ifdef SSL_DEBUG
fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
#endif
- } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
- md = EVP_md5_sha1();
- } else {
- md = EVP_sha1();
+ } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ goto err;
}
+ md = ssl_md(s->s3->tmp.peer_sigalg->hash_idx);
+
if (!PACKET_get_length_prefixed_2(pkt, &signature)
|| PACKET_remaining(pkt) != 0) {
+ al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
+ goto err;
}
- j = EVP_PKEY_size(pkey);
- if (j < 0) {
+ maxsig = EVP_PKEY_size(pkey);
+ if (maxsig < 0) {
+ al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
+ goto err;
}
/*
* Check signature length
*/
- if (PACKET_remaining(&signature) > (size_t)j) {
+ if (PACKET_remaining(&signature) > (size_t)maxsig) {
/* wrong packet length */
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
- goto f_err;
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
+ SSL_R_WRONG_SIGNATURE_LENGTH);
+ goto err;
}
- if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
- || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
- SSL3_RANDOM_SIZE) <= 0
- || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
- SSL3_RANDOM_SIZE) <= 0
- || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
- PACKET_remaining(¶ms)) <= 0) {
+
+ md_ctx = EVP_MD_CTX_new();
+ if (md_ctx == NULL) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (EVP_DigestVerifyInit(md_ctx, &pctx, md, NULL, pkey) <= 0) {
al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
- goto f_err;
+ goto err;
+ }
+ if (SSL_USE_PSS(s)) {
+ if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0
+ || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx,
+ RSA_PSS_SALTLEN_DIGEST) <= 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
+ goto err;
+ }
+ }
+ if (EVP_DigestVerifyUpdate(md_ctx, &(s->s3->client_random[0]),
+ SSL3_RANDOM_SIZE) <= 0
+ || EVP_DigestVerifyUpdate(md_ctx, &(s->s3->server_random[0]),
+ SSL3_RANDOM_SIZE) <= 0
+ || EVP_DigestVerifyUpdate(md_ctx, PACKET_data(¶ms),
+ PACKET_remaining(¶ms)) <= 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
+ goto err;
}
- if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
- PACKET_remaining(&signature), pkey) <= 0) {
+ if (EVP_DigestVerifyFinal(md_ctx, PACKET_data(&signature),
+ PACKET_remaining(&signature)) <= 0) {
/* bad signature */
al = SSL_AD_DECRYPT_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
- goto f_err;
+ goto err;
}
+ EVP_MD_CTX_free(md_ctx);
+ md_ctx = NULL;
} else {
/* aNULL, aSRP or PSK do not need public keys */
- if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
+ if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
+ && !(alg_k & SSL_PSK)) {
/* Might be wrong key type, check it */
- if (ssl3_check_cert_and_algorithm(s))
+ if (ssl3_check_cert_and_algorithm(s)) {
/* Otherwise this shouldn't happen */
+ al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ } else {
+ al = SSL_AD_DECODE_ERROR;
+ }
goto err;
}
/* still data left over */
if (PACKET_remaining(pkt) != 0) {
+ al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
- goto f_err;
+ goto err;
}
}
- EVP_MD_CTX_free(md_ctx);
+
return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
err:
-#ifndef OPENSSL_NO_RSA
- RSA_free(rsa);
-#endif
-#ifndef OPENSSL_NO_EC
- EVP_PKEY_CTX_free(pctx);
-#endif
- EVP_MD_CTX_free(md_ctx);
+ if (al != -1)
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
ossl_statem_set_error(s);
+ EVP_MD_CTX_free(md_ctx);
return MSG_PROCESS_ERROR;
}
MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
{
int ret = MSG_PROCESS_ERROR;
- unsigned int list_len, ctype_num, i, name_len;
- X509_NAME *xn = NULL;
- const unsigned char *data;
- const unsigned char *namestart, *namebytes;
- STACK_OF(X509_NAME) *ca_sk = NULL;
-
- if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
+ int al = SSL_AD_DECODE_ERROR;
+ size_t i;
- /* get the certificate types */
- if (!PACKET_get_1(pkt, &ctype_num)
- || !PACKET_get_bytes(pkt, &data, ctype_num)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
- goto err;
- }
- OPENSSL_free(s->cert->ctypes);
- s->cert->ctypes = NULL;
- if (ctype_num > SSL3_CT_NUMBER) {
- /* If we exceed static buffer copy all to cert structure */
- s->cert->ctypes = OPENSSL_malloc(ctype_num);
- if (s->cert->ctypes == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- memcpy(s->cert->ctypes, data, ctype_num);
- s->cert->ctype_num = (size_t)ctype_num;
- ctype_num = SSL3_CT_NUMBER;
- }
- for (i = 0; i < ctype_num; i++)
- s->s3->tmp.ctype[i] = data[i];
+ /* Clear certificate validity flags */
+ for (i = 0; i < SSL_PKEY_NUM; i++)
+ s->s3->tmp.valid_flags[i] = 0;
+
+ if (SSL_IS_TLS13(s)) {
+ PACKET reqctx, extensions;
+ RAW_EXTENSION *rawexts = NULL;
+
+ /* Free and zero certificate types: it is not present in TLS 1.3 */
+ OPENSSL_free(s->s3->tmp.ctype);
+ s->s3->tmp.ctype = NULL;
+ s->s3->tmp.ctype_len = 0;
- if (SSL_USE_SIGALGS(s)) {
- if (!PACKET_get_net_2(pkt, &list_len)
- || !PACKET_get_bytes(pkt, &data, list_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ /* TODO(TLS1.3) need to process request context, for now ignore */
+ if (!PACKET_get_length_prefixed_1(pkt, &reqctx)) {
SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
SSL_R_LENGTH_MISMATCH);
goto err;
}
- /* Clear certificate digests and validity flags */
- for (i = 0; i < SSL_PKEY_NUM; i++) {
- s->s3->tmp.md[i] = NULL;
- s->s3->tmp.valid_flags[i] = 0;
+ if (!PACKET_get_length_prefixed_2(pkt, &extensions)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_BAD_LENGTH);
+ goto err;
}
- if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
- SSL_R_SIGNATURE_ALGORITHMS_ERROR);
+ if (!tls_collect_extensions(s, &extensions,
+ SSL_EXT_TLS1_3_CERTIFICATE_REQUEST,
+ &rawexts, &al, NULL)
+ || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE_REQUEST,
+ rawexts, NULL, 0, &al)) {
+ OPENSSL_free(rawexts);
goto err;
}
+ OPENSSL_free(rawexts);
if (!tls1_process_sigalgs(s)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
goto err;
}
} else {
- ssl_set_default_md(s);
- }
+ PACKET ctypes;
- /* get the CA RDNs */
- if (!PACKET_get_net_2(pkt, &list_len)
- || PACKET_remaining(pkt) != list_len) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
- goto err;
- }
-
- while (PACKET_remaining(pkt)) {
- if (!PACKET_get_net_2(pkt, &name_len)
- || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ /* get the certificate types */
+ if (!PACKET_get_length_prefixed_1(pkt, &ctypes)) {
SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
SSL_R_LENGTH_MISMATCH);
goto err;
}
- namestart = namebytes;
-
- if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
- name_len)) == NULL) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
+ if (!PACKET_memdup(&ctypes, &s->s3->tmp.ctype, &s->s3->tmp.ctype_len)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR);
goto err;
}
- if (namebytes != (namestart + name_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
- SSL_R_CA_DN_LENGTH_MISMATCH);
- goto err;
+ if (SSL_USE_SIGALGS(s)) {
+ PACKET sigalgs;
+
+ if (!PACKET_get_length_prefixed_2(pkt, &sigalgs)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
+ SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+
+ if (!tls1_save_sigalgs(s, &sigalgs)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
+ SSL_R_SIGNATURE_ALGORITHMS_ERROR);
+ goto err;
+ }
+ if (!tls1_process_sigalgs(s)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
}
- if (!sk_X509_NAME_push(ca_sk, xn)) {
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
+
+ /* get the CA RDNs */
+ if (!parse_ca_names(s, pkt, &al))
goto err;
- }
- xn = NULL;
+ }
+
+ if (PACKET_remaining(pkt) != 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
+ goto err;
}
/* we should setup a certificate to return.... */
s->s3->tmp.cert_req = 1;
- s->s3->tmp.ctype_num = ctype_num;
- sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
- s->s3->tmp.ca_names = ca_sk;
- ca_sk = NULL;
- ret = MSG_PROCESS_CONTINUE_READING;
+ ret = MSG_PROCESS_CONTINUE_PROCESSING;
goto done;
err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
ossl_statem_set_error(s);
done:
- X509_NAME_free(xn);
- sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
return ret;
}
-static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
-{
- return (X509_NAME_cmp(*a, *b));
-}
-
MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
{
- int al;
+ int al = SSL_AD_DECODE_ERROR;
unsigned int ticklen;
- unsigned long ticket_lifetime_hint;
+ unsigned long ticket_lifetime_hint, age_add = 0;
+ unsigned int sess_len;
+ RAW_EXTENSION *exts = NULL;
if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
- || !PACKET_get_net_2(pkt, &ticklen)
- || PACKET_remaining(pkt) != ticklen) {
- al = SSL_AD_DECODE_ERROR;
+ || (SSL_IS_TLS13(s) && !PACKET_get_net_4(pkt, &age_add))
+ || !PACKET_get_net_2(pkt, &ticklen)
+ || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) != ticklen)
+ || (SSL_IS_TLS13(s)
+ && (ticklen == 0 || PACKET_remaining(pkt) < ticklen))) {
SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
goto f_err;
}
- /* Server is allowed to change its mind and send an empty ticket. */
+ /*
+ * Server is allowed to change its mind (in <=TLSv1.2) and send an empty
+ * ticket. We already checked this TLSv1.3 case above, so it should never
+ * be 0 here in that instance
+ */
if (ticklen == 0)
return MSG_PROCESS_CONTINUE_READING;
+ /* TODO(TLS1.3): Is this a suitable test for TLS1.3? */
if (s->session->session_id_length > 0) {
int i = s->session_ctx->session_cache_mode;
SSL_SESSION *new_sess;
*/
if (i & SSL_SESS_CACHE_CLIENT) {
/*
- * Remove the old session from the cache
+ * Remove the old session from the cache. We carry on if this fails
*/
- if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
- if (s->session_ctx->remove_session_cb != NULL)
- s->session_ctx->remove_session_cb(s->session_ctx,
- s->session);
- } else {
- /* We carry on if this fails */
- SSL_CTX_remove_session(s->session_ctx, s->session);
- }
+ SSL_CTX_remove_session(s->session_ctx, s->session);
}
if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
s->session = new_sess;
}
- OPENSSL_free(s->session->tlsext_tick);
- s->session->tlsext_ticklen = 0;
+ /*
+ * Technically the cast to long here is not guaranteed by the C standard -
+ * but we use it elsewhere, so this should be ok.
+ */
+ s->session->time = (long)time(NULL);
+
+ OPENSSL_free(s->session->ext.tick);
+ s->session->ext.tick = NULL;
+ s->session->ext.ticklen = 0;
- s->session->tlsext_tick = OPENSSL_malloc(ticklen);
- if (s->session->tlsext_tick == NULL) {
+ s->session->ext.tick = OPENSSL_malloc(ticklen);
+ if (s->session->ext.tick == NULL) {
SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
goto err;
}
- if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
+ if (!PACKET_copy_bytes(pkt, s->session->ext.tick, ticklen)) {
al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
goto f_err;
}
- s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
- s->session->tlsext_ticklen = ticklen;
+ s->session->ext.tick_lifetime_hint = ticket_lifetime_hint;
+ s->session->ext.tick_age_add = age_add;
+ s->session->ext.ticklen = ticklen;
+
+ if (SSL_IS_TLS13(s)) {
+ PACKET extpkt;
+
+ if (!PACKET_as_length_prefixed_2(pkt, &extpkt)
+ || !tls_collect_extensions(s, &extpkt,
+ SSL_EXT_TLS1_3_NEW_SESSION_TICKET,
+ &exts, &al, NULL)
+ || !tls_parse_all_extensions(s,
+ SSL_EXT_TLS1_3_NEW_SESSION_TICKET,
+ exts, NULL, 0, &al)) {
+ SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_BAD_EXTENSION);
+ goto f_err;
+ }
+ }
+
/*
* There are two ways to detect a resumed ticket session. One is to set
* an appropriate session ID and then the server must return a match in
* elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
* SHA256 is disabled) hash of the ticket.
*/
- EVP_Digest(s->session->tlsext_tick, ticklen,
- s->session->session_id, &s->session->session_id_length,
- EVP_sha256(), NULL);
+ /*
+ * TODO(size_t): we use sess_len here because EVP_Digest expects an int
+ * but s->session->session_id_length is a size_t
+ */
+ if (!EVP_Digest(s->session->ext.tick, ticklen,
+ s->session->session_id, &sess_len,
+ EVP_sha256(), NULL)) {
+ SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
+ goto err;
+ }
+ s->session->session_id_length = sess_len;
+
+ /* This is a standalone message in TLSv1.3, so there is no more to read */
+ if (SSL_IS_TLS13(s)) {
+ OPENSSL_free(exts);
+ ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
+ return MSG_PROCESS_FINISHED_READING;
+ }
+
return MSG_PROCESS_CONTINUE_READING;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
err:
ossl_statem_set_error(s);
+ OPENSSL_free(exts);
return MSG_PROCESS_ERROR;
}
-MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
+/*
+ * In TLSv1.3 this is called from the extensions code, otherwise it is used to
+ * parse a separate message. Returns 1 on success or 0 on failure. On failure
+ * |*al| is populated with a suitable alert code.
+ */
+int tls_process_cert_status_body(SSL *s, PACKET *pkt, int *al)
{
- int al;
- unsigned long resplen;
+ size_t resplen;
unsigned int type;
if (!PACKET_get_1(pkt, &type)
- || type != TLSEXT_STATUSTYPE_ocsp) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
- goto f_err;
+ || type != TLSEXT_STATUSTYPE_ocsp) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY,
+ SSL_R_UNSUPPORTED_STATUS_TYPE);
+ return 0;
}
- if (!PACKET_get_net_3(pkt, &resplen)
- || PACKET_remaining(pkt) != resplen) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
- goto f_err;
+ if (!PACKET_get_net_3_len(pkt, &resplen)
+ || PACKET_remaining(pkt) != resplen) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH);
+ return 0;
}
- s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
- if (s->tlsext_ocsp_resp == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
- goto f_err;
+ s->ext.ocsp.resp = OPENSSL_malloc(resplen);
+ if (s->ext.ocsp.resp == NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, ERR_R_MALLOC_FAILURE);
+ return 0;
}
- if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
- goto f_err;
+ if (!PACKET_copy_bytes(pkt, s->ext.ocsp.resp, resplen)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS_BODY, SSL_R_LENGTH_MISMATCH);
+ return 0;
}
- s->tlsext_ocsp_resplen = resplen;
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
+ s->ext.ocsp.resp_len = resplen;
+
+ return 1;
}
-MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
+
+MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
{
- if (PACKET_remaining(pkt) > 0) {
- /* should contain no data */
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
+ int al;
+
+ if (!tls_process_cert_status_body(s, pkt, &al)) {
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
ossl_statem_set_error(s);
return MSG_PROCESS_ERROR;
}
-#ifndef OPENSSL_NO_SRP
- if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
- if (SRP_Calc_A_param(s) <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- }
-#endif
+ return MSG_PROCESS_CONTINUE_READING;
+}
+/*
+ * Perform miscellaneous checks and processing after we have received the
+ * server's initial flight. In TLS1.3 this is after the Server Finished message.
+ * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0
+ * on failure.
+ */
+int tls_process_initial_server_flight(SSL *s, int *al)
+{
/*
* at this point we check that we have the required stuff from
* the server
*/
if (!ssl3_check_cert_and_algorithm(s)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ return 0;
}
/*
- * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
- * |tlsext_ocsp_resplen| values will be set if we actually received a status
+ * Call the ocsp status callback if needed. The |ext.ocsp.resp| and
+ * |ext.ocsp.resp_len| values will be set if we actually received a status
* message, or NULL and -1 otherwise
*/
- if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
- int ret;
- ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
+ if (s->ext.status_type != TLSEXT_STATUSTYPE_nothing
+ && s->ctx->ext.status_cb != NULL) {
+ int ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg);
+
if (ret == 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL,
- SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
+ *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
+ SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT,
SSL_R_INVALID_STATUS_RESPONSE);
- return MSG_PROCESS_ERROR;
+ return 0;
}
if (ret < 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
- return MSG_PROCESS_ERROR;
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT,
+ ERR_R_MALLOC_FAILURE);
+ return 0;
}
}
-
#ifndef OPENSSL_NO_CT
if (s->ct_validation_callback != NULL) {
/* Note we validate the SCTs whether or not we abort on error */
if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- return MSG_PROCESS_ERROR;
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ return 0;
+ }
+ }
+#endif
+
+ return 1;
+}
+
+MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
+{
+ int al = SSL_AD_INTERNAL_ERROR;
+
+ if (PACKET_remaining(pkt) > 0) {
+ /* should contain no data */
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+#ifndef OPENSSL_NO_SRP
+ if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
+ if (SRP_Calc_A_param(s) <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
+ goto err;
}
}
#endif
+ /*
+ * Error queue messages are generated directly by this function
+ */
+ if (!tls_process_initial_server_flight(s, &al))
+ goto err;
+
#ifndef OPENSSL_NO_SCTP
/* Only applies to renegotiation */
if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
- && s->renegotiate != 0)
+ && s->renegotiate != 0)
return MSG_PROCESS_CONTINUE_PROCESSING;
else
#endif
return MSG_PROCESS_FINISHED_READING;
+
+ err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ ossl_statem_set_error(s);
+ return MSG_PROCESS_ERROR;
}
-int tls_construct_client_key_exchange(SSL *s)
+static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al)
{
- unsigned char *p;
- int n;
#ifndef OPENSSL_NO_PSK
- size_t pskhdrlen = 0;
+ int ret = 0;
+ /*
+ * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
+ * \0-terminated identity. The last byte is for us for simulating
+ * strnlen.
+ */
+ char identity[PSK_MAX_IDENTITY_LEN + 1];
+ size_t identitylen = 0;
+ unsigned char psk[PSK_MAX_PSK_LEN];
+ unsigned char *tmppsk = NULL;
+ char *tmpidentity = NULL;
+ size_t psklen = 0;
+
+ if (s->psk_client_callback == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
+ *al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ }
+
+ memset(identity, 0, sizeof(identity));
+
+ psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
+ identity, sizeof(identity) - 1,
+ psk, sizeof(psk));
+
+ if (psklen > PSK_MAX_PSK_LEN) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ goto err;
+ } else if (psklen == 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
+ SSL_R_PSK_IDENTITY_NOT_FOUND);
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ goto err;
+ }
+
+ identitylen = strlen(identity);
+ if (identitylen > PSK_MAX_IDENTITY_LEN) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ goto err;
+ }
+
+ tmppsk = OPENSSL_memdup(psk, psklen);
+ tmpidentity = OPENSSL_strdup(identity);
+ if (tmppsk == NULL || tmpidentity == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
+ *al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ }
+
+ OPENSSL_free(s->s3->tmp.psk);
+ s->s3->tmp.psk = tmppsk;
+ s->s3->tmp.psklen = psklen;
+ tmppsk = NULL;
+ OPENSSL_free(s->session->psk_identity);
+ s->session->psk_identity = tmpidentity;
+ tmpidentity = NULL;
+
+ if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ }
+
+ ret = 1;
+
+ err:
+ OPENSSL_cleanse(psk, psklen);
+ OPENSSL_cleanse(identity, sizeof(identity));
+ OPENSSL_clear_free(tmppsk, psklen);
+ OPENSSL_clear_free(tmpidentity, identitylen);
+
+ return ret;
+#else
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
#endif
- unsigned long alg_k;
+}
+
+static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al)
+{
#ifndef OPENSSL_NO_RSA
- unsigned char *q;
+ unsigned char *encdata = NULL;
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *pctx = NULL;
-#endif
-#if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
- EVP_PKEY *ckey = NULL, *skey = NULL;
-#endif
-#ifndef OPENSSL_NO_EC
- unsigned char *encodedPoint = NULL;
- int encoded_pt_len = 0;
-#endif
+ size_t enclen;
unsigned char *pms = NULL;
size_t pmslen = 0;
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-
- p = ssl_handshake_start(s);
-
-#ifndef OPENSSL_NO_PSK
- if (alg_k & SSL_PSK) {
- int psk_err = 1;
+ if (s->session->peer == NULL) {
/*
- * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
- * \0-terminated identity. The last byte is for us for simulating
- * strnlen.
+ * We should always have a server certificate with SSL_kRSA.
*/
- char identity[PSK_MAX_IDENTITY_LEN + 1];
- size_t identitylen;
- unsigned char psk[PSK_MAX_PSK_LEN];
- size_t psklen;
-
- if (s->psk_client_callback == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_PSK_NO_CLIENT_CB);
- goto err;
- }
-
- memset(identity, 0, sizeof(identity));
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
- psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
- identity, sizeof(identity) - 1,
- psk, sizeof(psk));
+ pkey = X509_get0_pubkey(s->session->peer);
+ if (EVP_PKEY_get0_RSA(pkey) == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
- if (psklen > PSK_MAX_PSK_LEN) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto psk_err;
- } else if (psklen == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_PSK_IDENTITY_NOT_FOUND);
- goto psk_err;
- }
- OPENSSL_free(s->s3->tmp.psk);
- s->s3->tmp.psk = OPENSSL_memdup(psk, psklen);
- OPENSSL_cleanse(psk, psklen);
+ pmslen = SSL_MAX_MASTER_KEY_LENGTH;
+ pms = OPENSSL_malloc(pmslen);
+ if (pms == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+ }
- if (s->s3->tmp.psk == NULL) {
- OPENSSL_cleanse(identity, sizeof(identity));
- goto memerr;
- }
+ pms[0] = s->client_version >> 8;
+ pms[1] = s->client_version & 0xff;
+ /* TODO(size_t): Convert this function */
+ if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) {
+ goto err;
+ }
- s->s3->tmp.psklen = psklen;
- identitylen = strlen(identity);
- if (identitylen > PSK_MAX_IDENTITY_LEN) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto psk_err;
- }
- OPENSSL_free(s->session->psk_identity);
- s->session->psk_identity = OPENSSL_strdup(identity);
- if (s->session->psk_identity == NULL) {
- OPENSSL_cleanse(identity, sizeof(identity));
- goto memerr;
- }
-
- s2n(identitylen, p);
- memcpy(p, identity, identitylen);
- pskhdrlen = 2 + identitylen;
- p += identitylen;
- psk_err = 0;
-psk_err:
- OPENSSL_cleanse(identity, sizeof(identity));
- if (psk_err != 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- goto err;
- }
+ /* Fix buf for TLS and beyond */
+ if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
+ goto err;
}
- if (alg_k & SSL_kPSK) {
- n = 0;
- } else
-#endif
+ pctx = EVP_PKEY_CTX_new(pkey, NULL);
+ if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
+ || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
+ goto err;
+ }
+ if (!WPACKET_allocate_bytes(pkt, enclen, &encdata)
+ || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
+ goto err;
+ }
+ EVP_PKEY_CTX_free(pctx);
+ pctx = NULL;
- /* Fool emacs indentation */
- if (0) {
+ /* Fix buf for TLS and beyond */
+ if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
+ goto err;
}
-#ifndef OPENSSL_NO_RSA
- else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
- size_t enclen;
- pmslen = SSL_MAX_MASTER_KEY_LENGTH;
- pms = OPENSSL_malloc(pmslen);
- if (pms == NULL)
- goto memerr;
-
- if (s->session->peer == NULL) {
- /*
- * We should always have a server certificate with SSL_kRSA.
- */
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- pkey = X509_get0_pubkey(s->session->peer);
- if (EVP_PKEY_get0_RSA(pkey) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
+ /* Log the premaster secret, if logging is enabled. */
+ if (!ssl_log_rsa_client_key_exchange(s, encdata, enclen, pms, pmslen))
+ goto err;
- pms[0] = s->client_version >> 8;
- pms[1] = s->client_version & 0xff;
- if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
- goto err;
+ s->s3->tmp.pms = pms;
+ s->s3->tmp.pmslen = pmslen;
- q = p;
- /* Fix buf for TLS and beyond */
- if (s->version > SSL3_VERSION)
- p += 2;
- pctx = EVP_PKEY_CTX_new(pkey, NULL);
- if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
- || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_EVP_LIB);
- goto err;
- }
- if (EVP_PKEY_encrypt(pctx, p, &enclen, pms, pmslen) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_BAD_RSA_ENCRYPT);
- goto err;
- }
- n = enclen;
- EVP_PKEY_CTX_free(pctx);
- pctx = NULL;
-# ifdef PKCS1_CHECK
- if (s->options & SSL_OP_PKCS1_CHECK_1)
- p[1]++;
- if (s->options & SSL_OP_PKCS1_CHECK_2)
- tmp_buf[0] = 0x70;
-# endif
+ return 1;
+ err:
+ OPENSSL_clear_free(pms, pmslen);
+ EVP_PKEY_CTX_free(pctx);
- /* Fix buf for TLS and beyond */
- if (s->version > SSL3_VERSION) {
- s2n(n, q);
- n += 2;
- }
- }
+ return 0;
+#else
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
#endif
+}
+
+static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al)
+{
#ifndef OPENSSL_NO_DH
- else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
- DH *dh_clnt = NULL;
- BIGNUM *pub_key;
- skey = s->s3->peer_tmp;
- if (skey == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- ckey = ssl_generate_pkey(skey, NID_undef);
- dh_clnt = EVP_PKEY_get0_DH(ckey);
+ DH *dh_clnt = NULL;
+ const BIGNUM *pub_key;
+ EVP_PKEY *ckey = NULL, *skey = NULL;
+ unsigned char *keybytes = NULL;
- if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
+ skey = s->s3->peer_tmp;
+ if (skey == NULL)
+ goto err;
+
+ ckey = ssl_generate_pkey(skey);
+ if (ckey == NULL)
+ goto err;
+
+ dh_clnt = EVP_PKEY_get0_DH(ckey);
+
+ if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0)
+ goto err;
+ /* send off the data */
+ DH_get0_key(dh_clnt, &pub_key, NULL);
+ if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes))
+ goto err;
+
+ BN_bn2bin(pub_key, keybytes);
+ EVP_PKEY_free(ckey);
+
+ return 1;
+ err:
+ EVP_PKEY_free(ckey);
+#endif
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+}
+
+static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al)
+{
+#ifndef OPENSSL_NO_EC
+ unsigned char *encodedPoint = NULL;
+ size_t encoded_pt_len = 0;
+ EVP_PKEY *ckey = NULL, *skey = NULL;
+ int ret = 0;
- /* send off the data */
- DH_get0_key(dh_clnt, &pub_key, NULL);
- n = BN_num_bytes(pub_key);
- s2n(n, p);
- BN_bn2bin(pub_key, p);
- n += 2;
- EVP_PKEY_free(ckey);
- ckey = NULL;
+ skey = s->s3->peer_tmp;
+ if (skey == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
+ return 0;
}
-#endif
-#ifndef OPENSSL_NO_EC
- else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
+ ckey = ssl_generate_pkey(skey);
+ if (ckey == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
- skey = s->s3->peer_tmp;
- if ((skey == NULL) || EVP_PKEY_get0_EC_KEY(skey) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
+ if (ssl_derive(s, ckey, skey, 0) == 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
+ goto err;
+ }
- ckey = ssl_generate_pkey(skey, NID_undef);
+ /* Generate encoding of client key */
+ encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
- if (ssl_derive(s, ckey, skey) == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB);
- goto err;
- }
+ if (encoded_pt_len == 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
+ goto err;
+ }
- /* Generate encoding of client key */
- encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey),
- POINT_CONVERSION_UNCOMPRESSED,
- &encodedPoint, NULL);
+ if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
- if (encoded_pt_len == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
+ ret = 1;
+ err:
+ OPENSSL_free(encodedPoint);
+ EVP_PKEY_free(ckey);
+ return ret;
+#else
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+#endif
+}
- EVP_PKEY_free(ckey);
- ckey = NULL;
+static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al)
+{
+#ifndef OPENSSL_NO_GOST
+ /* GOST key exchange message creation */
+ EVP_PKEY_CTX *pkey_ctx = NULL;
+ X509 *peer_cert;
+ size_t msglen;
+ unsigned int md_len;
+ unsigned char shared_ukm[32], tmp[256];
+ EVP_MD_CTX *ukm_hash = NULL;
+ int dgst_nid = NID_id_GostR3411_94;
+ unsigned char *pms = NULL;
+ size_t pmslen = 0;
- n = encoded_pt_len;
+ if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
+ dgst_nid = NID_id_GostR3411_2012_256;
- *p = n; /* length of encoded point */
- /* Encoded point will be copied here */
- p += 1;
- /* copy the point */
- memcpy(p, encodedPoint, n);
- /* increment n to account for length field */
- n += 1;
+ /*
+ * Get server certificate PKEY and create ctx from it
+ */
+ peer_cert = s->session->peer;
+ if (!peer_cert) {
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
+ SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
+ return 0;
+ }
- /* Free allocated memory */
- OPENSSL_free(encodedPoint);
+ pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
+ if (pkey_ctx == NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
+ return 0;
}
-#endif /* !OPENSSL_NO_EC */
-#ifndef OPENSSL_NO_GOST
- else if (alg_k & SSL_kGOST) {
- /* GOST key exchange message creation */
- EVP_PKEY_CTX *pkey_ctx;
- X509 *peer_cert;
- size_t msglen;
- unsigned int md_len;
- unsigned char shared_ukm[32], tmp[256];
- EVP_MD_CTX *ukm_hash;
- int dgst_nid = NID_id_GostR3411_94;
- if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
- dgst_nid = NID_id_GostR3411_2012_256;
-
-
- pmslen = 32;
- pms = OPENSSL_malloc(pmslen);
- if (pms == NULL)
- goto memerr;
+ /*
+ * If we have send a certificate, and certificate key
+ * parameters match those of server certificate, use
+ * certificate key for key exchange
+ */
- /*
- * Get server sertificate PKEY and create ctx from it
- */
- peer_cert = s->session->peer;
- if (!peer_cert) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
- goto err;
- }
+ /* Otherwise, generate ephemeral key pair */
+ pmslen = 32;
+ pms = OPENSSL_malloc(pmslen);
+ if (pms == NULL) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
- pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
- if (pkey_ctx == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
- /*
- * If we have send a certificate, and certificate key
- * parameters match those of server certificate, use
- * certificate key for key exchange
+ if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
+ /* Generate session key
+ * TODO(size_t): Convert this function
*/
+ || RAND_bytes(pms, (int)pmslen) <= 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
+ goto err;
+ };
+ /*
+ * Compute shared IV and store it in algorithm-specific context
+ * data
+ */
+ ukm_hash = EVP_MD_CTX_new();
+ if (ukm_hash == NULL
+ || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
+ || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
+ SSL3_RANDOM_SIZE) <= 0
+ || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
+ SSL3_RANDOM_SIZE) <= 0
+ || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ EVP_MD_CTX_free(ukm_hash);
+ ukm_hash = NULL;
+ if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
+ EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
+ goto err;
+ }
+ /* Make GOST keytransport blob message */
+ /*
+ * Encapsulate it into sequence
+ */
+ msglen = 255;
+ if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
+ goto err;
+ }
- /* Otherwise, generate ephemeral key pair */
+ if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)
+ || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81))
+ || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) {
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
- if (pkey_ctx == NULL
- || EVP_PKEY_encrypt_init(pkey_ctx) <= 0
- /* Generate session key */
- || RAND_bytes(pms, pmslen) <= 0) {
- EVP_PKEY_CTX_free(pkey_ctx);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- };
- /*
- * If we have client certificate, use its secret as peer key
- */
- if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
- if (EVP_PKEY_derive_set_peer
- (pkey_ctx, s->cert->key->privatekey) <= 0) {
- /*
- * If there was an error - just ignore it. Ephemeral key
- * * would be used
- */
- ERR_clear_error();
- }
- }
- /*
- * Compute shared IV and store it in algorithm-specific context
- * data
- */
- ukm_hash = EVP_MD_CTX_new();
- if (EVP_DigestInit(ukm_hash,
- EVP_get_digestbynid(dgst_nid)) <= 0
- || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
- SSL3_RANDOM_SIZE) <= 0
- || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
- SSL3_RANDOM_SIZE) <= 0
- || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
- EVP_MD_CTX_free(ukm_hash);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- EVP_MD_CTX_free(ukm_hash);
- if (EVP_PKEY_CTX_ctrl
- (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
- shared_ukm) < 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_LIBRARY_BUG);
- goto err;
- }
- /* Make GOST keytransport blob message */
- /*
- * Encapsulate it into sequence
- */
- *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
- msglen = 255;
- if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_LIBRARY_BUG);
- goto err;
- }
- if (msglen >= 0x80) {
- *(p++) = 0x81;
- *(p++) = msglen & 0xff;
- n = msglen + 3;
- } else {
- *(p++) = msglen & 0xff;
- n = msglen + 2;
- }
- memcpy(p, tmp, msglen);
- /* Check if pubkey from client certificate was used */
- if (EVP_PKEY_CTX_ctrl
- (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
- /* Set flag "skip certificate verify" */
- s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
- }
- EVP_PKEY_CTX_free(pkey_ctx);
+ EVP_PKEY_CTX_free(pkey_ctx);
+ s->s3->tmp.pms = pms;
+ s->s3->tmp.pmslen = pmslen;
- }
+ return 1;
+ err:
+ EVP_PKEY_CTX_free(pkey_ctx);
+ OPENSSL_clear_free(pms, pmslen);
+ EVP_MD_CTX_free(ukm_hash);
+ return 0;
+#else
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
#endif
+}
+
+static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al)
+{
#ifndef OPENSSL_NO_SRP
- else if (alg_k & SSL_kSRP) {
- if (s->srp_ctx.A != NULL) {
- /* send off the data */
- n = BN_num_bytes(s->srp_ctx.A);
- s2n(n, p);
- BN_bn2bin(s->srp_ctx.A, p);
- n += 2;
- } else {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- OPENSSL_free(s->session->srp_username);
- s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
- if (s->session->srp_username == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
+ unsigned char *abytes = NULL;
+
+ if (s->srp_ctx.A == NULL
+ || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A),
+ &abytes)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
+ return 0;
}
-#endif
- else {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto err;
+ BN_bn2bin(s->srp_ctx.A, abytes);
+
+ OPENSSL_free(s->session->srp_username);
+ s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
+ if (s->session->srp_username == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
+ return 0;
}
-#ifndef OPENSSL_NO_PSK
- n += pskhdrlen;
+ return 1;
+#else
+ SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
#endif
+}
+
+int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt)
+{
+ unsigned long alg_k;
+ int al = -1;
+
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
+
+ if ((alg_k & SSL_PSK)
+ && !tls_construct_cke_psk_preamble(s, pkt, &al))
+ goto err;
- if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
+ if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
+ if (!tls_construct_cke_rsa(s, pkt, &al))
+ goto err;
+ } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
+ if (!tls_construct_cke_dhe(s, pkt, &al))
+ goto err;
+ } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
+ if (!tls_construct_cke_ecdhe(s, pkt, &al))
+ goto err;
+ } else if (alg_k & SSL_kGOST) {
+ if (!tls_construct_cke_gost(s, pkt, &al))
+ goto err;
+ } else if (alg_k & SSL_kSRP) {
+ if (!tls_construct_cke_srp(s, pkt, &al))
+ goto err;
+ } else if (!(alg_k & SSL_kPSK)) {
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
goto err;
}
- if (pms != NULL) {
- s->s3->tmp.pms = pms;
- s->s3->tmp.pmslen = pmslen;
- }
-
return 1;
- memerr:
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
err:
- OPENSSL_clear_free(pms, pmslen);
+ if (al != -1)
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
s->s3->tmp.pms = NULL;
-#ifndef OPENSSL_NO_RSA
- EVP_PKEY_CTX_free(pctx);
-#endif
-#ifndef OPENSSL_NO_EC
- OPENSSL_free(encodedPoint);
-#endif
-#if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
- EVP_PKEY_free(ckey);
-#endif
#ifndef OPENSSL_NO_PSK
OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
s->s3->tmp.psk = NULL;
#endif
- ossl_statem_set_error(s);
return 0;
}
sizeof(DTLS1_SCTP_AUTH_LABEL));
if (SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey), labelbuffer,
- sizeof(labelbuffer), NULL, 0, 0) <= 0)
+ sizeof(sctpauthkey), labelbuffer,
+ sizeof(labelbuffer), NULL, 0, 0) <= 0)
goto err;
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
return 0;
}
-int tls_construct_client_verify(SSL *s)
-{
- unsigned char *p;
- EVP_PKEY *pkey;
- const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
- EVP_MD_CTX *mctx;
- unsigned u = 0;
- unsigned long n = 0;
- long hdatalen = 0;
- void *hdata;
-
- mctx = EVP_MD_CTX_new();
- if (mctx == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- p = ssl_handshake_start(s);
- pkey = s->cert->key->privatekey;
-
- hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
- if (hdatalen <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- if (SSL_USE_SIGALGS(s)) {
- if (!tls12_get_sigandhash(p, pkey, md)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- p += 2;
- n = 2;
- }
-#ifdef SSL_DEBUG
- fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
-#endif
- if (!EVP_SignInit_ex(mctx, md, NULL)
- || !EVP_SignUpdate(mctx, hdata, hdatalen)
- || (s->version == SSL3_VERSION
- && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
- s->session->master_key_length,
- s->session->master_key))
- || !EVP_SignFinal(mctx, p + 2, &u, pkey)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
- goto err;
- }
-#ifndef OPENSSL_NO_GOST
- {
- int pktype = EVP_PKEY_id(pkey);
- if (pktype == NID_id_GostR3410_2001
- || pktype == NID_id_GostR3410_2012_256
- || pktype == NID_id_GostR3410_2012_512)
- BUF_reverse(p + 2, NULL, u);
- }
-#endif
-
- s2n(u, p);
- n += u + 2;
- /* Digest cached records and discard handshake buffer */
- if (!ssl3_digest_cached_records(s, 0))
- goto err;
- if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- EVP_MD_CTX_free(mctx);
- return 1;
- err:
- EVP_MD_CTX_free(mctx);
- return 0;
-}
-
/*
* Check a certificate can be used for client authentication. Currently check
* cert exists, if we have a suitable digest for TLS 1.2 if static DH client
*/
static int ssl3_check_client_certificate(SSL *s)
{
- if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
- return 0;
/* If no suitable signature algorithm can't use certificate */
- if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
+ if (!tls_choose_sigalg(s, NULL) || s->s3->tmp.sigalg == NULL)
return 0;
/*
* If strict mode check suitability of chain before using it. This also
return WORK_ERROR;
}
-int tls_construct_client_certificate(SSL *s)
+int tls_construct_client_certificate(SSL *s, WPACKET *pkt)
{
- if (!ssl3_output_cert_chain(s,
- (s->s3->tmp.cert_req ==
- 2) ? NULL : s->cert->key)) {
+ int al = SSL_AD_INTERNAL_ERROR;
+
+ /*
+ * TODO(TLS1.3): For now we must put an empty context. Needs to be filled in
+ * later
+ */
+ if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0))
+ || !ssl3_output_cert_chain(s, pkt,
+ (s->s3->tmp.cert_req == 2) ? NULL
+ : s->cert->key,
+ &al)) {
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- ossl_statem_set_error(s);
- return 0;
+ goto err;
+ }
+
+ if (SSL_IS_TLS13(s)
+ && SSL_IS_FIRST_HANDSHAKE(s)
+ && (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE,
+ SSL_R_CANNOT_CHANGE_CIPHER);
+ goto err;
}
return 1;
+ err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ return 0;
}
#define has_bits(i,m) (((i)&(m)) == (m))
}
#ifndef OPENSSL_NO_NEXTPROTONEG
-int tls_construct_next_proto(SSL *s)
+int tls_construct_next_proto(SSL *s, WPACKET *pkt)
{
- unsigned int len, padding_len;
- unsigned char *d;
+ size_t len, padding_len;
+ unsigned char *padding = NULL;
- len = s->next_proto_negotiated_len;
+ len = s->ext.npn_len;
padding_len = 32 - ((len + 2) % 32);
- d = (unsigned char *)s->init_buf->data;
- d[4] = len;
- memcpy(d + 5, s->next_proto_negotiated, len);
- d[5 + len] = padding_len;
- memset(d + 6 + len, 0, padding_len);
- *(d++) = SSL3_MT_NEXT_PROTO;
- l2n3(2 + len + padding_len, d);
- s->init_num = 4 + 2 + len + padding_len;
- s->init_off = 0;
+
+ if (!WPACKET_sub_memcpy_u8(pkt, s->ext.npn, len)
+ || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ memset(padding, 0, padding_len);
return 1;
+ err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ return 0;
}
#endif
+MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt)
+{
+ if (PACKET_remaining(pkt) > 0) {
+ /* should contain no data */
+ SSLerr(SSL_F_TLS_PROCESS_HELLO_REQ, SSL_R_LENGTH_MISMATCH);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
+ ossl_statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+ }
+
+ /*
+ * This is a historical discrepancy (not in the RFC) maintained for
+ * compatibility reasons. If a TLS client receives a HelloRequest it will
+ * attempt an abbreviated handshake. However if a DTLS client receives a
+ * HelloRequest it will do a full handshake. Either behaviour is reasonable
+ * but doing one for TLS and another for DTLS is odd.
+ */
+ if (SSL_IS_DTLS(s))
+ SSL_renegotiate(s);
+ else
+ SSL_renegotiate_abbreviated(s);
+
+ return MSG_PROCESS_FINISHED_READING;
+}
+
+static MSG_PROCESS_RETURN tls_process_encrypted_extensions(SSL *s, PACKET *pkt)
+{
+ int al = SSL_AD_INTERNAL_ERROR;
+ PACKET extensions;
+ RAW_EXTENSION *rawexts = NULL;
+
+ if (!PACKET_as_length_prefixed_2(pkt, &extensions)) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_ENCRYPTED_EXTENSIONS, SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+
+ if (!tls_collect_extensions(s, &extensions,
+ SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, &rawexts,
+ &al, NULL)
+ || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
+ rawexts, NULL, 0, &al))
+ goto err;
+
+ OPENSSL_free(rawexts);
+ return MSG_PROCESS_CONTINUE_READING;
+
+ err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ ossl_statem_set_error(s);
+ OPENSSL_free(rawexts);
+ return MSG_PROCESS_ERROR;
+}
+
int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
{
int i = 0;
return i;
}
-int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
- unsigned char *p)
+int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt)
{
- int i, j = 0;
- const SSL_CIPHER *c;
- unsigned char *q;
+ int i;
+ size_t totlen = 0, len, maxlen;
int empty_reneg_info_scsv = !s->renegotiate;
/* Set disabled masks for this session */
ssl_set_client_disabled(s);
if (sk == NULL)
return (0);
- q = p;
- for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
+#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
+# if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
+# error Max cipher length too short
+# endif
+ /*
+ * Some servers hang if client hello > 256 bytes as hack workaround
+ * chop number of supported ciphers to keep it well below this if we
+ * use TLS v1.2
+ */
+ if (TLS1_get_version(s) >= TLS1_2_VERSION)
+ maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
+ else
+#endif
+ /* Maximum length that can be stored in 2 bytes. Length must be even */
+ maxlen = 0xfffe;
+
+ if (empty_reneg_info_scsv)
+ maxlen -= 2;
+ if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
+ maxlen -= 2;
+
+ for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) {
+ const SSL_CIPHER *c;
+
c = sk_SSL_CIPHER_value(sk, i);
/* Skip disabled ciphers */
if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
continue;
- j = s->method->put_cipher_by_char(c, p);
- p += j;
+
+ if (!s->method->put_cipher_by_char(c, pkt, &len)) {
+ SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ totlen += len;
}
- /*
- * If p == q, no ciphers; caller indicates an error. Otherwise, add
- * applicable SCSVs.
- */
- if (p != q) {
+
+ if (totlen == 0) {
+ SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE);
+ return 0;
+ }
+
+ if (totlen != 0) {
if (empty_reneg_info_scsv) {
static SSL_CIPHER scsv = {
0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
- j = s->method->put_cipher_by_char(&scsv, p);
- p += j;
+ if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
+ SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
}
if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
static SSL_CIPHER scsv = {
0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
- j = s->method->put_cipher_by_char(&scsv, p);
- p += j;
+ if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
+ SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
}
}
- return (p - q);
+ return 1;
+}
+
+int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt)
+{
+ if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY
+ && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_END_OF_EARLY_DATA,
+ ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+
+ s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING;
+ return 1;
}
projects / openssl.git / blobdiff