/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
*
* Licensed under the OpenSSL license (the "License"). You may not use
#include <openssl/evp.h>
#include <openssl/x509.h>
+/*
+ * Map error codes to TLS/SSL alart types.
+ */
+typedef struct x509err2alert_st {
+ int x509err;
+ int alert;
+} X509ERR2ALERT;
+
+/* Fixed value used in the ServerHello random field to identify an HRR */
+const unsigned char hrrrandom[] = {
+ 0xcf, 0x21, 0xad, 0x74, 0xe5, 0x9a, 0x61, 0x11, 0xbe, 0x1d, 0x8c, 0x02,
+ 0x1e, 0x65, 0xb8, 0x91, 0xc2, 0xa2, 0x11, 0x16, 0x7a, 0xbb, 0x8c, 0x5e,
+ 0x07, 0x9e, 0x09, 0xe2, 0xc8, 0xa8, 0x33, 0x9c
+};
+
/*
* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
* SSL3_RT_CHANGE_CIPHER_SPEC)
/*
* should not be done for 'Hello Request's, but in that case we'll
* ignore the result anyway
+ * TLS1.3 KeyUpdate and NewSessionTicket do not need to be added
*/
- if (!ssl3_finish_mac(s,
- (unsigned char *)&s->init_buf->data[s->init_off],
- written))
- return -1;
-
+ if (!SSL_IS_TLS13(s) || (s->statem.hand_state != TLS_ST_SW_SESSION_TICKET
+ && s->statem.hand_state != TLS_ST_CW_KEY_UPDATE
+ && s->statem.hand_state != TLS_ST_SW_KEY_UPDATE))
+ if (!ssl3_finish_mac(s,
+ (unsigned char *)&s->init_buf->data[s->init_off],
+ written))
+ return -1;
if (written == s->init_num) {
if (s->msg_callback)
s->msg_callback(1, s->version, type, s->init_buf->data,
/* N.B. s->session_ctx == s->ctx here */
CRYPTO_atomic_add(&s->session_ctx->stats.sess_accept, 1, &i,
s->session_ctx->lock);
- } else if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
- /* Renegotiation is disabled */
- ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION);
- return 0;
- } else if (!s->s3->send_connection_binding &&
- !(s->options &
- SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
- /*
- * Server attempting to renegotiate with client that doesn't
- * support secure renegotiation.
- */
- SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_SETUP_HANDSHAKE,
- SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
- return 0;
} else {
/* N.B. s->ctx may not equal s->session_ctx */
CRYPTO_atomic_add(&s->ctx->stats.sess_accept_renegotiate, 1, &i,
size_t slen;
/* This is a real handshake so make sure we clean it up at the end */
- if (!s->server)
+ if (!s->server && s->post_handshake_auth != SSL_PHA_REQUESTED)
s->statem.cleanuphand = 1;
/*
return MSG_PROCESS_FINISHED_READING;
}
-#ifndef OPENSSL_NO_NEXTPROTONEG
/*
* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
* to far.
*/
-static void ssl3_take_mac(SSL *s)
+int ssl3_take_mac(SSL *s)
{
const char *sender;
size_t slen;
- /*
- * If no new cipher setup return immediately: other functions will set
- * the appropriate error.
- */
- if (s->s3->tmp.new_cipher == NULL)
- return;
+
if (!s->server) {
sender = s->method->ssl3_enc->server_finished_label;
slen = s->method->ssl3_enc->server_finished_label_len;
slen = s->method->ssl3_enc->client_finished_label_len;
}
- s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
- sender,
- slen,
- s->s3->tmp.peer_finish_md);
+ s->s3->tmp.peer_finish_md_len =
+ s->method->ssl3_enc->final_finish_mac(s, sender, slen,
+ s->s3->tmp.peer_finish_md);
+
+ if (s->s3->tmp.peer_finish_md_len == 0) {
+ /* SSLfatal() already called */
+ return 0;
+ }
+
+ return 1;
}
-#endif
MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
{
/* This is a real handshake so make sure we clean it up at the end */
- if (s->server)
- s->statem.cleanuphand = 1;
+ if (s->server) {
+ if (s->post_handshake_auth != SSL_PHA_REQUESTED)
+ s->statem.cleanuphand = 1;
+ if (SSL_IS_TLS13(s) && !tls13_save_handshake_digest_for_pha(s)) {
+ /* SSLfatal() already called */
+ return MSG_PROCESS_ERROR;
+ }
+ }
/*
* In TLSv1.3 a Finished message signals a key change so the end of the
*/
if (SSL_IS_TLS13(s)) {
if (s->server) {
- if (!s->method->ssl3_enc->change_cipher_state(s,
+ if (s->post_handshake_auth != SSL_PHA_REQUESTED &&
+ !s->method->ssl3_enc->change_cipher_state(s,
SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_SERVER_READ)) {
/* SSLfatal() already called */
return MSG_PROCESS_ERROR;
* in NBIO events. If |clearbufs| is set then init_buf and the wbio buffer is
* freed up as well.
*/
-WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs)
+WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs, int stop)
{
int discard;
void (*cb) (const SSL *ssl, int type, int val) = NULL;
-#ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- WORK_STATE ret;
- ret = dtls_wait_for_dry(s);
- if (ret != WORK_FINISHED_CONTINUE)
- return ret;
- }
-#endif
-
if (clearbufs) {
if (!SSL_IS_DTLS(s)) {
/*
s->init_num = 0;
}
+ if (SSL_IS_TLS13(s) && !s->server
+ && s->post_handshake_auth == SSL_PHA_REQUESTED)
+ s->post_handshake_auth = SSL_PHA_EXT_SENT;
+
+ /*
+ * Only set if there was a Finished message and this isn't after a TLSv1.3
+ * post handshake exchange
+ */
if (s->statem.cleanuphand) {
/* skipped if we just sent a HelloRequest */
s->renegotiate = 0;
s->new_session = 0;
s->statem.cleanuphand = 0;
+ s->ext.ticket_expected = 0;
ssl3_cleanup_key_block(s);
if (s->server) {
- ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
+ /*
+ * In TLSv1.3 we update the cache as part of constructing the
+ * NewSessionTicket
+ */
+ if (!SSL_IS_TLS13(s))
+ ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
/* N.B. s->ctx may not equal s->session_ctx */
CRYPTO_atomic_add(&s->ctx->stats.sess_accept_good, 1, &discard,
s->ctx->lock);
s->handshake_func = ossl_statem_accept;
+
+ if (SSL_IS_DTLS(s) && !s->hit) {
+ /*
+ * We are finishing after the client. We start the timer going
+ * in case there are any retransmits of our final flight
+ * required.
+ */
+ dtls1_start_timer(s);
+ }
} else {
/*
* In TLSv1.3 we update the cache as part of processing the
s->handshake_func = ossl_statem_connect;
CRYPTO_atomic_add(&s->session_ctx->stats.sess_connect_good, 1,
&discard, s->session_ctx->lock);
- }
-
- if (s->info_callback != NULL)
- cb = s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb = s->ctx->info_callback;
- if (cb != NULL)
- cb(s, SSL_CB_HANDSHAKE_DONE, 1);
+ if (SSL_IS_DTLS(s) && s->hit) {
+ /*
+ * We are finishing after the server. We start the timer going
+ * in case there are any retransmits of our final flight
+ * required.
+ */
+ dtls1_start_timer(s);
+ }
+ }
if (SSL_IS_DTLS(s)) {
/* done with handshaking */
}
}
- /*
- * If we've not cleared the buffers its because we've got more work to do,
- * so continue.
- */
- if (!clearbufs)
- return WORK_FINISHED_CONTINUE;
+ if (s->info_callback != NULL)
+ cb = s->info_callback;
+ else if (s->ctx->info_callback != NULL)
+ cb = s->ctx->info_callback;
+ /* The callback may expect us to not be in init at handshake done */
ossl_statem_set_in_init(s, 0);
+
+ if (cb != NULL)
+ cb(s, SSL_CB_HANDSHAKE_DONE, 1);
+
+ if (!stop) {
+ /* If we've got more work to do we go back into init */
+ ossl_statem_set_in_init(s, 1);
+ return WORK_FINISHED_CONTINUE;
+ }
+
return WORK_FINISHED_STOP;
}
SSL_R_BAD_CHANGE_CIPHER_SPEC);
return 0;
}
+ if (s->statem.hand_state == TLS_ST_BEFORE
+ && (s->s3->flags & TLS1_FLAGS_STATELESS) != 0) {
+ /*
+ * We are stateless and we received a CCS. Probably this is
+ * from a client between the first and second ClientHellos.
+ * We should ignore this, but return an error because we do
+ * not return success until we see the second ClientHello
+ * with a valid cookie.
+ */
+ return 0;
+ }
s->s3->tmp.message_type = *mt = SSL3_MT_CHANGE_CIPHER_SPEC;
s->init_num = readbytes - 1;
s->init_msg = s->init_buf->data;
n -= readbytes;
}
-#ifndef OPENSSL_NO_NEXTPROTONEG
/*
* If receiving Finished, record MAC of prior handshake messages for
* Finished verification.
*/
- if (*s->init_buf->data == SSL3_MT_FINISHED)
- ssl3_take_mac(s);
-#endif
+ if (*(s->init_buf->data) == SSL3_MT_FINISHED && !ssl3_take_mac(s)) {
+ /* SSLfatal() already called */
+ *len = 0;
+ return 0;
+ }
/* Feed this message into MAC computation. */
if (RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
/*
* We defer feeding in the HRR until later. We'll do it as part of
* processing the message
+ * The TLsv1.3 handshake transcript stops at the ClientFinished
+ * message.
*/
- if (s->s3->tmp.message_type != SSL3_MT_HELLO_RETRY_REQUEST
- && !ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
- s->init_num + SSL3_HM_HEADER_LENGTH)) {
- /* SSLfatal() already called */
- *len = 0;
- return 0;
+#define SERVER_HELLO_RANDOM_OFFSET (SSL3_HM_HEADER_LENGTH + 2)
+ /* KeyUpdate and NewSessionTicket do not need to be added */
+ if (!SSL_IS_TLS13(s) || (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET
+ && s->s3->tmp.message_type != SSL3_MT_KEY_UPDATE)) {
+ if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO
+ || s->init_num < SERVER_HELLO_RANDOM_OFFSET + SSL3_RANDOM_SIZE
+ || memcmp(hrrrandom,
+ s->init_buf->data + SERVER_HELLO_RANDOM_OFFSET,
+ SSL3_RANDOM_SIZE) != 0) {
+ if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
+ s->init_num + SSL3_HM_HEADER_LENGTH)) {
+ /* SSLfatal() already called */
+ *len = 0;
+ return 0;
+ }
+ }
}
if (s->msg_callback)
s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
return 1;
}
-int ssl_verify_alarm_type(long type)
+static const X509ERR2ALERT x509table[] = {
+ {X509_V_ERR_APPLICATION_VERIFICATION, SSL_AD_HANDSHAKE_FAILURE},
+ {X509_V_ERR_CA_KEY_TOO_SMALL, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_CA_MD_TOO_WEAK, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_CERT_CHAIN_TOO_LONG, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_CERT_HAS_EXPIRED, SSL_AD_CERTIFICATE_EXPIRED},
+ {X509_V_ERR_CERT_NOT_YET_VALID, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_CERT_REJECTED, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_CERT_REVOKED, SSL_AD_CERTIFICATE_REVOKED},
+ {X509_V_ERR_CERT_SIGNATURE_FAILURE, SSL_AD_DECRYPT_ERROR},
+ {X509_V_ERR_CERT_UNTRUSTED, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_CRL_HAS_EXPIRED, SSL_AD_CERTIFICATE_EXPIRED},
+ {X509_V_ERR_CRL_NOT_YET_VALID, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_CRL_SIGNATURE_FAILURE, SSL_AD_DECRYPT_ERROR},
+ {X509_V_ERR_DANE_NO_MATCH, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_EE_KEY_TOO_SMALL, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_EMAIL_MISMATCH, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_HOSTNAME_MISMATCH, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_INVALID_CA, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_INVALID_CALL, SSL_AD_INTERNAL_ERROR},
+ {X509_V_ERR_INVALID_PURPOSE, SSL_AD_UNSUPPORTED_CERTIFICATE},
+ {X509_V_ERR_IP_ADDRESS_MISMATCH, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_OUT_OF_MEM, SSL_AD_INTERNAL_ERROR},
+ {X509_V_ERR_PATH_LENGTH_EXCEEDED, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_STORE_LOOKUP, SSL_AD_INTERNAL_ERROR},
+ {X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE, SSL_AD_BAD_CERTIFICATE},
+ {X509_V_ERR_UNABLE_TO_GET_CRL, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE, SSL_AD_UNKNOWN_CA},
+ {X509_V_ERR_UNSPECIFIED, SSL_AD_INTERNAL_ERROR},
+
+ /* Last entry; return this if we don't find the value above. */
+ {X509_V_OK, SSL_AD_CERTIFICATE_UNKNOWN}
+};
+
+int ssl_x509err2alert(int x509err)
{
- int al;
+ const X509ERR2ALERT *tp;
- switch (type) {
- case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
- case X509_V_ERR_UNABLE_TO_GET_CRL:
- case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
- al = SSL_AD_UNKNOWN_CA;
- break;
- case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
- case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
- case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
- case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
- case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
- case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
- case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
- case X509_V_ERR_CERT_NOT_YET_VALID:
- case X509_V_ERR_CRL_NOT_YET_VALID:
- case X509_V_ERR_CERT_UNTRUSTED:
- case X509_V_ERR_CERT_REJECTED:
- case X509_V_ERR_HOSTNAME_MISMATCH:
- case X509_V_ERR_EMAIL_MISMATCH:
- case X509_V_ERR_IP_ADDRESS_MISMATCH:
- case X509_V_ERR_DANE_NO_MATCH:
- case X509_V_ERR_EE_KEY_TOO_SMALL:
- case X509_V_ERR_CA_KEY_TOO_SMALL:
- case X509_V_ERR_CA_MD_TOO_WEAK:
- al = SSL_AD_BAD_CERTIFICATE;
- break;
- case X509_V_ERR_CERT_SIGNATURE_FAILURE:
- case X509_V_ERR_CRL_SIGNATURE_FAILURE:
- al = SSL_AD_DECRYPT_ERROR;
- break;
- case X509_V_ERR_CERT_HAS_EXPIRED:
- case X509_V_ERR_CRL_HAS_EXPIRED:
- al = SSL_AD_CERTIFICATE_EXPIRED;
- break;
- case X509_V_ERR_CERT_REVOKED:
- al = SSL_AD_CERTIFICATE_REVOKED;
- break;
- case X509_V_ERR_UNSPECIFIED:
- case X509_V_ERR_OUT_OF_MEM:
- case X509_V_ERR_INVALID_CALL:
- case X509_V_ERR_STORE_LOOKUP:
- al = SSL_AD_INTERNAL_ERROR;
- break;
- case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
- case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
- case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
- case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
- case X509_V_ERR_CERT_CHAIN_TOO_LONG:
- case X509_V_ERR_PATH_LENGTH_EXCEEDED:
- case X509_V_ERR_INVALID_CA:
- al = SSL_AD_UNKNOWN_CA;
- break;
- case X509_V_ERR_APPLICATION_VERIFICATION:
- al = SSL_AD_HANDSHAKE_FAILURE;
- break;
- case X509_V_ERR_INVALID_PURPOSE:
- al = SSL_AD_UNSUPPORTED_CERTIFICATE;
- break;
- default:
- al = SSL_AD_CERTIFICATE_UNKNOWN;
- break;
- }
- return al;
+ for (tp = x509table; tp->x509err != X509_V_OK; ++tp)
+ if (tp->x509err == x509err)
+ break;
+ return tp->alert;
}
int ssl_allow_compression(SSL *s)
suppversions = &hello->pre_proc_exts[TLSEXT_IDX_supported_versions];
+ /* If we did an HRR then supported versions is mandatory */
+ if (!suppversions->present && s->hello_retry_request != SSL_HRR_NONE)
+ return SSL_R_UNSUPPORTED_PROTOCOL;
+
if (suppversions->present && !SSL_IS_DTLS(s)) {
unsigned int candidate_vers = 0;
unsigned int best_vers = 0;
}
if (best_vers > 0) {
- if (SSL_IS_TLS13(s)) {
+ if (s->hello_retry_request != SSL_HRR_NONE) {
/*
- * We get here if this is after a HelloRetryRequest. In this
- * case we just check that we still negotiated TLSv1.3
+ * This is after a HelloRetryRequest so we better check that we
+ * negotiated TLSv1.3
*/
if (best_vers != TLS1_3_VERSION)
return SSL_R_UNSUPPORTED_PROTOCOL;
*
* @s: client SSL handle.
* @version: The proposed version from the server's HELLO.
- * @checkdgrd: Whether to check the downgrade sentinels in the server_random
+ * @extensions: The extensions received
*
* Returns 1 on success or 0 on error.
*/
-int ssl_choose_client_version(SSL *s, int version, int checkdgrd)
+int ssl_choose_client_version(SSL *s, int version, RAW_EXTENSION *extensions)
{
const version_info *vent;
const version_info *table;
int highver = 0;
+ int origv;
- /* TODO(TLS1.3): Remove this before release */
- if (version == TLS1_3_VERSION_DRAFT)
- version = TLS1_3_VERSION;
+ origv = s->version;
+ s->version = version;
- if (s->hello_retry_request && version != TLS1_3_VERSION) {
+ /* This will overwrite s->version if the extension is present */
+ if (!tls_parse_extension(s, TLSEXT_IDX_supported_versions,
+ SSL_EXT_TLS1_2_SERVER_HELLO
+ | SSL_EXT_TLS1_3_SERVER_HELLO, extensions,
+ NULL, 0)) {
+ s->version = origv;
+ return 0;
+ }
+
+ if (s->hello_retry_request != SSL_HRR_NONE
+ && s->version != TLS1_3_VERSION) {
+ s->version = origv;
SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_SSL_CHOOSE_CLIENT_VERSION,
SSL_R_WRONG_SSL_VERSION);
return 0;
switch (s->method->version) {
default:
- if (version != s->version) {
+ if (s->version != s->method->version) {
+ s->version = origv;
SSLfatal(s, SSL_AD_PROTOCOL_VERSION,
SSL_F_SSL_CHOOSE_CLIENT_VERSION,
SSL_R_WRONG_SSL_VERSION);
if (vent->cmeth == NULL)
continue;
- if (highver != 0 && version != vent->version)
+ if (highver != 0 && s->version != vent->version)
continue;
method = vent->cmeth();
err = ssl_method_error(s, method);
if (err != 0) {
- if (version == vent->version) {
+ if (s->version == vent->version) {
+ s->version = origv;
SSLfatal(s, SSL_AD_PROTOCOL_VERSION,
SSL_F_SSL_CHOOSE_CLIENT_VERSION, err);
return 0;
if (highver == 0)
highver = vent->version;
- if (version != vent->version)
+ if (s->version != vent->version)
continue;
#ifndef OPENSSL_NO_TLS13DOWNGRADE
/* Check for downgrades */
- if (checkdgrd) {
- if (version == TLS1_2_VERSION && highver > version) {
- if (memcmp(tls12downgrade,
- s->s3->server_random + SSL3_RANDOM_SIZE
- - sizeof(tls12downgrade),
- sizeof(tls12downgrade)) == 0) {
- SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
- SSL_F_SSL_CHOOSE_CLIENT_VERSION,
- SSL_R_INAPPROPRIATE_FALLBACK);
- return 0;
- }
- } else if (!SSL_IS_DTLS(s)
- && version < TLS1_2_VERSION
- && highver > version) {
- if (memcmp(tls11downgrade,
- s->s3->server_random + SSL3_RANDOM_SIZE
- - sizeof(tls11downgrade),
- sizeof(tls11downgrade)) == 0) {
- SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
- SSL_F_SSL_CHOOSE_CLIENT_VERSION,
- SSL_R_INAPPROPRIATE_FALLBACK);
- return 0;
- }
+ if (s->version == TLS1_2_VERSION && highver > s->version) {
+ if (memcmp(tls12downgrade,
+ s->s3->server_random + SSL3_RANDOM_SIZE
+ - sizeof(tls12downgrade),
+ sizeof(tls12downgrade)) == 0) {
+ s->version = origv;
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+ SSL_F_SSL_CHOOSE_CLIENT_VERSION,
+ SSL_R_INAPPROPRIATE_FALLBACK);
+ return 0;
+ }
+ } else if (!SSL_IS_DTLS(s)
+ && s->version < TLS1_2_VERSION
+ && highver > s->version) {
+ if (memcmp(tls11downgrade,
+ s->s3->server_random + SSL3_RANDOM_SIZE
+ - sizeof(tls11downgrade),
+ sizeof(tls11downgrade)) == 0) {
+ s->version = origv;
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+ SSL_F_SSL_CHOOSE_CLIENT_VERSION,
+ SSL_R_INAPPROPRIATE_FALLBACK);
+ return 0;
}
}
#endif
s->method = method;
- s->version = version;
return 1;
}
+ s->version = origv;
SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_SSL_CHOOSE_CLIENT_VERSION,
SSL_R_UNSUPPORTED_PROTOCOL);
return 0;
{
int ver_min, ver_max, ret;
+ /*
+ * In a renegotiation we always send the same client_version that we sent
+ * last time, regardless of which version we eventually negotiated.
+ */
+ if (!SSL_IS_FIRST_HANDSHAKE(s))
+ return 0;
+
ret = ssl_get_min_max_version(s, &ver_min, &ver_max);
if (ret != 0)
#endif
/* Replace ClientHello1 in the transcript hash with a synthetic message */
-int create_synthetic_message_hash(SSL *s)
+int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
+ size_t hashlen, const unsigned char *hrr,
+ size_t hrrlen)
{
- unsigned char hashval[EVP_MAX_MD_SIZE];
- size_t hashlen = 0;
+ unsigned char hashvaltmp[EVP_MAX_MD_SIZE];
unsigned char msghdr[SSL3_HM_HEADER_LENGTH];
memset(msghdr, 0, sizeof(msghdr));
- /* Get the hash of the initial ClientHello */
- if (!ssl3_digest_cached_records(s, 0)
- || !ssl_handshake_hash(s, hashval, sizeof(hashval), &hashlen)) {
- /* SSLfatal() already called */
- return 0;
+ if (hashval == NULL) {
+ hashval = hashvaltmp;
+ hashlen = 0;
+ /* Get the hash of the initial ClientHello */
+ if (!ssl3_digest_cached_records(s, 0)
+ || !ssl_handshake_hash(s, hashvaltmp, sizeof(hashvaltmp),
+ &hashlen)) {
+ /* SSLfatal() already called */
+ return 0;
+ }
}
/* Reinitialise the transcript hash */
return 0;
}
+ /*
+ * Now re-inject the HRR and current message if appropriate (we just deleted
+ * it when we reinitialised the transcript hash above). Only necessary after
+ * receiving a ClientHello2 with a cookie.
+ */
+ if (hrr != NULL
+ && (!ssl3_finish_mac(s, hrr, hrrlen)
+ || !ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
+ s->s3->tmp.message_size
+ + SSL3_HM_HEADER_LENGTH))) {
+ /* SSLfatal() already called */
+ return 0;
+ }
+
return 1;
}
*ptbs = tbs;
return tbslen;
}
+
+/*
+ * Saves the current handshake digest for Post-Handshake Auth,
+ * Done after ClientFinished is processed, done exactly once
+ */
+int tls13_save_handshake_digest_for_pha(SSL *s)
+{
+ if (s->pha_dgst == NULL) {
+ if (!ssl3_digest_cached_records(s, 1))
+ /* SSLfatal() already called */
+ return 0;
+
+ s->pha_dgst = EVP_MD_CTX_new();
+ if (s->pha_dgst == NULL) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS13_SAVE_HANDSHAKE_DIGEST_FOR_PHA,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ if (!EVP_MD_CTX_copy_ex(s->pha_dgst,
+ s->s3->handshake_dgst)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS13_SAVE_HANDSHAKE_DIGEST_FOR_PHA,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/*
+ * Restores the Post-Handshake Auth handshake digest
+ * Done just before sending/processing the Cert Request
+ */
+int tls13_restore_handshake_digest_for_pha(SSL *s)
+{
+ if (s->pha_dgst == NULL) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS13_RESTORE_HANDSHAKE_DIGEST_FOR_PHA,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ if (!EVP_MD_CTX_copy_ex(s->s3->handshake_dgst,
+ s->pha_dgst)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS13_RESTORE_HANDSHAKE_DIGEST_FOR_PHA,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ return 1;
+}
projects / openssl.git / blobdiff