/*
* Copyright 1995-2016 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
* this file except in compliance with the License. You can obtain a copy
* https://www.openssl.org/source/license.html
*/
-/* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- * ECC cipher suite support in OpenSSL originally developed by
- * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
- */
-
#include <limits.h>
#include <string.h>
#include <stdio.h>
return 1;
}
+int tls_setup_handshake(SSL *s)
+{
+ if (!ssl3_init_finished_mac(s))
+ return 0;
+
+ /* Reset any extension flags */
+ memset(s->ext.extflags, 0, sizeof(s->ext.extflags));
+
+ if (s->server) {
+ STACK_OF(SSL_CIPHER) *ciphers = SSL_get_ciphers(s);
+ int i, ver_min, ver_max, ok = 0;
+
+ /*
+ * Sanity check that the maximum version we accept has ciphers
+ * enabled. For clients we do this check during construction of the
+ * ClientHello.
+ */
+ if (ssl_get_min_max_version(s, &ver_min, &ver_max) != 0) {
+ SSLerr(SSL_F_TLS_SETUP_HANDSHAKE, ERR_R_INTERNAL_ERROR);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ return 0;
+ }
+ for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
+ const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
+
+ if (SSL_IS_DTLS(s)) {
+ if (DTLS_VERSION_GE(ver_max, c->min_dtls) &&
+ DTLS_VERSION_LE(ver_max, c->max_dtls))
+ ok = 1;
+ } else if (ver_max >= c->min_tls && ver_max <= c->max_tls) {
+ ok = 1;
+ }
+ if (ok)
+ break;
+ }
+ if (!ok) {
+ SSLerr(SSL_F_TLS_SETUP_HANDSHAKE, SSL_R_NO_CIPHERS_AVAILABLE);
+ ERR_add_error_data(1, "No ciphers enabled for max supported "
+ "SSL/TLS version");
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ return 0;
+ }
+ if (SSL_IS_FIRST_HANDSHAKE(s)) {
+ s->ctx->stats.sess_accept++;
+ } 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.
+ */
+ SSLerr(SSL_F_TLS_SETUP_HANDSHAKE,
+ SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ return 0;
+ } else {
+ s->ctx->stats.sess_accept_renegotiate++;
+
+ s->s3->tmp.cert_request = 0;
+ }
+ } else {
+ if (SSL_IS_FIRST_HANDSHAKE(s))
+ s->ctx->stats.sess_connect++;
+ else
+ s->ctx->stats.sess_connect_renegotiate++;
+
+ /* mark client_random uninitialized */
+ memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
+ s->hit = 0;
+
+ s->s3->tmp.cert_req = 0;
+
+ if (SSL_IS_DTLS(s))
+ s->statem.use_timer = 1;
+ }
+
+ return 1;
+}
+
+/*
+ * Size of the to-be-signed TLS13 data, without the hash size itself:
+ * 64 bytes of value 32, 33 context bytes, 1 byte separator
+ */
+#define TLS13_TBS_START_SIZE 64
+#define TLS13_TBS_PREAMBLE_SIZE (TLS13_TBS_START_SIZE + 33 + 1)
+
+static int get_cert_verify_tbs_data(SSL *s, unsigned char *tls13tbs,
+ void **hdata, size_t *hdatalen)
+{
+ static const char *servercontext = "TLS 1.3, server CertificateVerify";
+ static const char *clientcontext = "TLS 1.3, client CertificateVerify";
+
+ if (SSL_IS_TLS13(s)) {
+ size_t hashlen;
+
+ /* Set the first 64 bytes of to-be-signed data to octet 32 */
+ memset(tls13tbs, 32, TLS13_TBS_START_SIZE);
+ /* This copies the 33 bytes of context plus the 0 separator byte */
+ if (s->statem.hand_state == TLS_ST_CR_CERT_VRFY
+ || s->statem.hand_state == TLS_ST_SW_CERT_VRFY)
+ strcpy((char *)tls13tbs + TLS13_TBS_START_SIZE, servercontext);
+ else
+ strcpy((char *)tls13tbs + TLS13_TBS_START_SIZE, clientcontext);
+
+ /*
+ * If we're currently reading then we need to use the saved handshake
+ * hash value. We can't use the current handshake hash state because
+ * that includes the CertVerify itself.
+ */
+ if (s->statem.hand_state == TLS_ST_CR_CERT_VRFY
+ || s->statem.hand_state == TLS_ST_SR_CERT_VRFY) {
+ memcpy(tls13tbs + TLS13_TBS_PREAMBLE_SIZE, s->cert_verify_hash,
+ s->cert_verify_hash_len);
+ hashlen = s->cert_verify_hash_len;
+ } else if (!ssl_handshake_hash(s, tls13tbs + TLS13_TBS_PREAMBLE_SIZE,
+ EVP_MAX_MD_SIZE, &hashlen)) {
+ return 0;
+ }
+
+ *hdata = tls13tbs;
+ *hdatalen = TLS13_TBS_PREAMBLE_SIZE + hashlen;
+ } else {
+ size_t retlen;
+
+ retlen = BIO_get_mem_data(s->s3->handshake_buffer, hdata);
+ if (retlen <= 0)
+ return 0;
+ *hdatalen = retlen;
+ }
+
+ return 1;
+}
+
+int tls_construct_cert_verify(SSL *s, WPACKET *pkt)
+{
+ EVP_PKEY *pkey = NULL;
+ const EVP_MD *md = NULL;
+ EVP_MD_CTX *mctx = NULL;
+ EVP_PKEY_CTX *pctx = NULL;
+ size_t hdatalen = 0, siglen = 0;
+ void *hdata;
+ unsigned char *sig = NULL;
+ unsigned char tls13tbs[TLS13_TBS_PREAMBLE_SIZE + EVP_MAX_MD_SIZE];
+ const SIGALG_LOOKUP *lu = s->s3->tmp.sigalg;
+
+ if (lu == NULL || s->s3->tmp.cert == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ pkey = s->s3->tmp.cert->privatekey;
+
+ if (pkey == NULL || !tls1_lookup_md(lu, &md)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ mctx = EVP_MD_CTX_new();
+ if (mctx == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* Get the data to be signed */
+ if (!get_cert_verify_tbs_data(s, tls13tbs, &hdata, &hdatalen)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (SSL_USE_SIGALGS(s) && !WPACKET_put_bytes_u16(pkt, lu->sigalg)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ siglen = EVP_PKEY_size(pkey);
+ sig = OPENSSL_malloc(siglen);
+ if (sig == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (EVP_DigestSignInit(mctx, &pctx, md, NULL, pkey) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_EVP_LIB);
+ goto err;
+ }
+
+ if (lu->sig == EVP_PKEY_RSA_PSS) {
+ 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) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_EVP_LIB);
+ goto err;
+ }
+ }
+ if (s->version == SSL3_VERSION) {
+ if (EVP_DigestSignUpdate(mctx, hdata, hdatalen) <= 0
+ || !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
+ (int)s->session->master_key_length,
+ s->session->master_key)
+ || EVP_DigestSignFinal(mctx, sig, &siglen) <= 0) {
+
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_EVP_LIB);
+ goto err;
+ }
+ } else if (EVP_DigestSign(mctx, sig, &siglen, hdata, hdatalen) <= 0) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_EVP_LIB);
+ goto err;
+ }
+
+#ifndef OPENSSL_NO_GOST
+ {
+ int pktype = lu->sig;
+
+ if (pktype == NID_id_GostR3410_2001
+ || pktype == NID_id_GostR3410_2012_256
+ || pktype == NID_id_GostR3410_2012_512)
+ BUF_reverse(sig, NULL, siglen);
+ }
+#endif
+
+ if (!WPACKET_sub_memcpy_u16(pkt, sig, siglen)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ /* Digest cached records and discard handshake buffer */
+ if (!ssl3_digest_cached_records(s, 0))
+ goto err;
+
+ OPENSSL_free(sig);
+ EVP_MD_CTX_free(mctx);
+ return 1;
+ err:
+ OPENSSL_free(sig);
+ EVP_MD_CTX_free(mctx);
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ return 0;
+}
+
+MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)
+{
+ EVP_PKEY *pkey = NULL;
+ const unsigned char *data;
+#ifndef OPENSSL_NO_GOST
+ unsigned char *gost_data = NULL;
+#endif
+ int al = SSL_AD_INTERNAL_ERROR, ret = MSG_PROCESS_ERROR;
+ int type = 0, j;
+ unsigned int len;
+ X509 *peer;
+ const EVP_MD *md = NULL;
+ size_t hdatalen = 0;
+ void *hdata;
+ unsigned char tls13tbs[TLS13_TBS_PREAMBLE_SIZE + EVP_MAX_MD_SIZE];
+ EVP_MD_CTX *mctx = EVP_MD_CTX_new();
+ EVP_PKEY_CTX *pctx = NULL;
+
+ if (mctx == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+
+ peer = s->session->peer;
+ pkey = X509_get0_pubkey(peer);
+ if (pkey == NULL)
+ goto f_err;
+
+ type = X509_certificate_type(peer, pkey);
+
+ if (!(type & EVP_PKT_SIGN)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY,
+ SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ goto f_err;
+ }
+
+ if (SSL_USE_SIGALGS(s)) {
+ int rv;
+ unsigned int sigalg;
+
+ if (!PACKET_get_net_2(pkt, &sigalg)) {
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+ rv = tls12_check_peer_sigalg(s, sigalg, pkey);
+ if (rv == -1) {
+ goto f_err;
+ } else if (rv == 0) {
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+#ifdef SSL_DEBUG
+ fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
+#endif
+ } else if (!tls1_set_peer_legacy_sigalg(s, pkey)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+
+ if (!tls1_lookup_md(s->s3->tmp.peer_sigalg, &md)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ al = SSL_AD_INTERNAL_ERROR;
+ goto f_err;
+ }
+
+ /* Check for broken implementations of GOST ciphersuites */
+ /*
+ * If key is GOST and len is exactly 64 or 128, it is signature without
+ * length field (CryptoPro implementations at least till TLS 1.2)
+ */
+#ifndef OPENSSL_NO_GOST
+ if (!SSL_USE_SIGALGS(s)
+ && ((PACKET_remaining(pkt) == 64
+ && (EVP_PKEY_id(pkey) == NID_id_GostR3410_2001
+ || EVP_PKEY_id(pkey) == NID_id_GostR3410_2012_256))
+ || (PACKET_remaining(pkt) == 128
+ && EVP_PKEY_id(pkey) == NID_id_GostR3410_2012_512))) {
+ len = PACKET_remaining(pkt);
+ } else
+#endif
+ if (!PACKET_get_net_2(pkt, &len)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ j = EVP_PKEY_size(pkey);
+ if (((int)len > j) || ((int)PACKET_remaining(pkt) > j)
+ || (PACKET_remaining(pkt) == 0)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_WRONG_SIGNATURE_SIZE);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+ if (!PACKET_get_bytes(pkt, &data, len)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
+ al = SSL_AD_DECODE_ERROR;
+ goto f_err;
+ }
+
+ if (!get_cert_verify_tbs_data(s, tls13tbs, &hdata, &hdatalen)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
+
+#ifdef SSL_DEBUG
+ fprintf(stderr, "Using client verify alg %s\n", EVP_MD_name(md));
+#endif
+ if (EVP_DigestVerifyInit(mctx, &pctx, md, NULL, pkey) <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
+ goto f_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) {
+ if ((gost_data = OPENSSL_malloc(len)) == NULL) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto f_err;
+ }
+ BUF_reverse(gost_data, data, len);
+ data = gost_data;
+ }
+ }
+#endif
+
+ 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) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
+ goto f_err;
+ }
+ }
+ if (s->version == SSL3_VERSION) {
+ if (EVP_DigestVerifyUpdate(mctx, hdata, hdatalen) <= 0
+ || !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
+ (int)s->session->master_key_length,
+ s->session->master_key)) {
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
+ goto f_err;
+ }
+ if (EVP_DigestVerifyFinal(mctx, data, len) <= 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_SIGNATURE);
+ goto f_err;
+ }
+ } else {
+ j = EVP_DigestVerify(mctx, data, len, hdata, hdatalen);
+ if (j <= 0) {
+ al = SSL_AD_DECRYPT_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_SIGNATURE);
+ goto f_err;
+ }
+ }
+
+ ret = MSG_PROCESS_CONTINUE_READING;
+ if (0) {
+ f_err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ ossl_statem_set_error(s);
+ }
+ BIO_free(s->s3->handshake_buffer);
+ s->s3->handshake_buffer = NULL;
+ EVP_MD_CTX_free(mctx);
+#ifndef OPENSSL_NO_GOST
+ OPENSSL_free(gost_data);
+#endif
+ return ret;
+}
+
int tls_construct_finished(SSL *s, WPACKET *pkt)
{
size_t finish_md_len;
const char *sender;
size_t slen;
+ /* This is a real handshake so make sure we clean it up at the end */
+ if (!s->server)
+ s->statem.cleanuphand = 1;
+
+ /*
+ * We only change the keys if we didn't already do this when we sent the
+ * client certificate
+ */
+ if (SSL_IS_TLS13(s)
+ && !s->server
+ && s->s3->tmp.cert_req == 0
+ && (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, SSL_R_CANNOT_CHANGE_CIPHER);
+ goto err;
+ }
+
if (s->server) {
sender = s->method->ssl3_enc->server_finished_label;
slen = s->method->ssl3_enc->server_finished_label_len;
goto err;
}
+ /*
+ * Log the master secret, if logging is enabled. We don't log it for
+ * TLSv1.3: there's a different key schedule for that.
+ */
+ if (!SSL_IS_TLS13(s) && !ssl_log_secret(s, MASTER_SECRET_LABEL,
+ s->session->master_key,
+ s->session->master_key_length)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
/*
* Copy the finished so we can use it for renegotiation checks
*/
+ if (!ossl_assert(finish_md_len <= EVP_MAX_MD_SIZE)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
if (!s->server) {
- OPENSSL_assert(finish_md_len <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md,
finish_md_len);
s->s3->previous_client_finished_len = finish_md_len;
} else {
- OPENSSL_assert(finish_md_len <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md,
finish_md_len);
s->s3->previous_server_finished_len = finish_md_len;
return 0;
}
+int tls_construct_key_update(SSL *s, WPACKET *pkt)
+{
+ if (!WPACKET_put_bytes_u8(pkt, s->key_update)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_KEY_UPDATE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ s->key_update = SSL_KEY_UPDATE_NONE;
+ return 1;
+
+ err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
+ return 0;
+}
+
+MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt)
+{
+ int al;
+ unsigned int updatetype;
+
+ s->key_update_count++;
+ if (s->key_update_count > MAX_KEY_UPDATE_MESSAGES) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_UPDATE, SSL_R_TOO_MANY_KEY_UPDATES);
+ goto err;
+ }
+
+ /*
+ * A KeyUpdate message signals a key change so the end of the message must
+ * be on a record boundary.
+ */
+ if (RECORD_LAYER_processed_read_pending(&s->rlayer)) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_UPDATE, SSL_R_NOT_ON_RECORD_BOUNDARY);
+ goto err;
+ }
+
+ if (!PACKET_get_1(pkt, &updatetype)
+ || PACKET_remaining(pkt) != 0) {
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_UPDATE, SSL_R_BAD_KEY_UPDATE);
+ goto err;
+ }
+
+ /*
+ * There are only two defined key update types. Fail if we get a value we
+ * didn't recognise.
+ */
+ if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
+ && updatetype != SSL_KEY_UPDATE_REQUESTED) {
+ al = SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_UPDATE, SSL_R_BAD_KEY_UPDATE);
+ goto err;
+ }
+
+ /*
+ * If we get a request for us to update our sending keys too then, we need
+ * to additionally send a KeyUpdate message. However that message should
+ * not also request an update (otherwise we get into an infinite loop).
+ */
+ if (updatetype == SSL_KEY_UPDATE_REQUESTED)
+ s->key_update = SSL_KEY_UPDATE_NOT_REQUESTED;
+
+ if (!tls13_update_key(s, 0)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_KEY_UPDATE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ return MSG_PROCESS_FINISHED_READING;
+ err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ ossl_statem_set_error(s);
+ return MSG_PROCESS_ERROR;
+}
+
#ifndef OPENSSL_NO_NEXTPROTONEG
/*
* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
}
#endif
-static int compare_extensions(const void *p1, const void *p2)
-{
- const RAW_EXTENSION *e1 = (const RAW_EXTENSION *)p1;
- const RAW_EXTENSION *e2 = (const RAW_EXTENSION *)p2;
- if (e1->type < e2->type)
- return -1;
- else if (e1->type > e2->type)
- return 1;
- else
- return 0;
-}
-
-/*
- * Gather a list of all the extensions. We don't actually process the content
- * of the extensions yet, except to check their types.
- *
- * Per http://tools.ietf.org/html/rfc5246#section-7.4.1.4, there may not be
- * more than one extension of the same type in a ClientHello or ServerHello.
- * This function returns 1 if all extensions are unique and we have parsed their
- * types, and 0 if the extensions contain duplicates, could not be successfully
- * parsed, or an internal error occurred.
- */
-int tls_parse_raw_extensions(PACKET *packet, RAW_EXTENSION **res,
- size_t *numfound, int *ad)
-{
- PACKET extensions = *packet;
- size_t num_extensions = 0, i = 0;
- RAW_EXTENSION *raw_extensions = NULL;
-
- /* First pass: count the extensions. */
- while (PACKET_remaining(&extensions) > 0) {
- unsigned int type;
- PACKET extension;
- if (!PACKET_get_net_2(&extensions, &type) ||
- !PACKET_get_length_prefixed_2(&extensions, &extension)) {
- *ad = SSL_AD_DECODE_ERROR;
- goto done;
- }
- num_extensions++;
- }
-
- if (num_extensions > 0) {
- raw_extensions = OPENSSL_malloc(sizeof(RAW_EXTENSION) * num_extensions);
- if (raw_extensions == NULL) {
- *ad = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PARSE_RAW_EXTENSIONS, ERR_R_MALLOC_FAILURE);
- goto done;
- }
-
- /* Second pass: gather the extension types. */
- for (i = 0; i < num_extensions; i++) {
- if (!PACKET_get_net_2(packet, &raw_extensions[i].type) ||
- !PACKET_get_length_prefixed_2(packet,
- &raw_extensions[i].data)) {
- /* This should not happen. */
- *ad = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PARSE_RAW_EXTENSIONS, ERR_R_INTERNAL_ERROR);
- goto done;
- }
- }
-
- if (PACKET_remaining(packet) != 0) {
- *ad = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PARSE_RAW_EXTENSIONS, SSL_R_LENGTH_MISMATCH);
- goto done;
- }
- /* Sort the extensions and make sure there are no duplicates. */
- qsort(raw_extensions, num_extensions, sizeof(RAW_EXTENSION),
- compare_extensions);
- for (i = 1; i < num_extensions; i++) {
- if (raw_extensions[i - 1].type == raw_extensions[i].type) {
- *ad = SSL_AD_DECODE_ERROR;
- goto done;
- }
- }
- }
-
- *res = raw_extensions;
- *numfound = num_extensions;
- return 1;
-
- done:
- OPENSSL_free(raw_extensions);
- return 0;
-}
-
-
-
MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
{
int al;
&& remain != DTLS1_CCS_HEADER_LENGTH + 1)
|| (s->version != DTLS1_BAD_VER
&& remain != DTLS1_CCS_HEADER_LENGTH - 1)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
+ al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
SSL_R_BAD_CHANGE_CIPHER_SPEC);
goto f_err;
}
} else {
if (remain != 0) {
- al = SSL_AD_ILLEGAL_PARAMETER;
+ al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
SSL_R_BAD_CHANGE_CIPHER_SPEC);
goto f_err;
MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt)
{
- int al;
+ int al = SSL_AD_INTERNAL_ERROR;
size_t md_len;
+
+ /* This is a real handshake so make sure we clean it up at the end */
+ if (s->server)
+ s->statem.cleanuphand = 1;
+
+ /*
+ * In TLSv1.3 a Finished 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_FINISHED, SSL_R_NOT_ON_RECORD_BOUNDARY);
+ goto f_err;
+ }
+
/* If this occurs, we have missed a message */
- if (!s->s3->change_cipher_spec) {
+ if (!SSL_IS_TLS13(s) && !s->s3->change_cipher_spec) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
goto f_err;
/*
* Copy the finished so we can use it for renegotiation checks
*/
+ if (!ossl_assert(md_len <= EVP_MAX_MD_SIZE)) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_FINISHED, ERR_R_INTERNAL_ERROR);
+ goto f_err;
+ }
if (s->server) {
- OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md,
md_len);
s->s3->previous_client_finished_len = md_len;
} else {
- OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md,
md_len);
s->s3->previous_server_finished_len = md_len;
}
+ /*
+ * In TLS1.3 we also have to change cipher state and do any final processing
+ * of the initial server flight (if we are a client)
+ */
+ if (SSL_IS_TLS13(s)) {
+ if (s->server) {
+ if (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_SERVER_READ)) {
+ SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_CANNOT_CHANGE_CIPHER);
+ goto f_err;
+ }
+ } else {
+ if (!s->method->ssl3_enc->generate_master_secret(s,
+ s->master_secret, s->handshake_secret, 0,
+ &s->session->master_key_length)) {
+ SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_CANNOT_CHANGE_CIPHER);
+ goto f_err;
+ }
+ if (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_READ)) {
+ SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_CANNOT_CHANGE_CIPHER);
+ goto f_err;
+ }
+ if (!tls_process_initial_server_flight(s, &al))
+ goto f_err;
+ }
+ }
+
return MSG_PROCESS_FINISHED_READING;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
return 1;
}
-unsigned long ssl3_output_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk)
+/* Add a certificate to the WPACKET */
+static int ssl_add_cert_to_wpacket(SSL *s, WPACKET *pkt, X509 *x, int chain,
+ int *al)
+{
+ int len;
+ unsigned char *outbytes;
+
+ len = i2d_X509(x, NULL);
+ if (len < 0) {
+ SSLerr(SSL_F_SSL_ADD_CERT_TO_WPACKET, ERR_R_BUF_LIB);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+ }
+ if (!WPACKET_sub_allocate_bytes_u24(pkt, len, &outbytes)
+ || i2d_X509(x, &outbytes) != len) {
+ SSLerr(SSL_F_SSL_ADD_CERT_TO_WPACKET, ERR_R_INTERNAL_ERROR);
+ *al = SSL_AD_INTERNAL_ERROR;
+ return 0;
+ }
+
+ if (SSL_IS_TLS13(s)
+ && !tls_construct_extensions(s, pkt, SSL_EXT_TLS1_3_CERTIFICATE, x,
+ chain, al))
+ return 0;
+
+ return 1;
+}
+
+/* Add certificate chain to provided WPACKET */
+static int ssl_add_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk, int *al)
{
+ int i, chain_count;
+ X509 *x;
+ STACK_OF(X509) *extra_certs;
+ STACK_OF(X509) *chain = NULL;
+ X509_STORE *chain_store;
+ int tmpal = SSL_AD_INTERNAL_ERROR;
+
+ if (cpk == NULL || cpk->x509 == NULL)
+ return 1;
+
+ x = cpk->x509;
+
+ /*
+ * If we have a certificate specific chain use it, else use parent ctx.
+ */
+ if (cpk->chain != NULL)
+ extra_certs = cpk->chain;
+ else
+ extra_certs = s->ctx->extra_certs;
+
+ if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
+ chain_store = NULL;
+ else if (s->cert->chain_store)
+ chain_store = s->cert->chain_store;
+ else
+ chain_store = s->ctx->cert_store;
+
+ if (chain_store != NULL) {
+ X509_STORE_CTX *xs_ctx = X509_STORE_CTX_new();
+
+ if (xs_ctx == NULL) {
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!X509_STORE_CTX_init(xs_ctx, chain_store, x, NULL)) {
+ X509_STORE_CTX_free(xs_ctx);
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
+ goto err;
+ }
+ /*
+ * It is valid for the chain not to be complete (because normally we
+ * don't include the root cert in the chain). Therefore we deliberately
+ * ignore the error return from this call. We're not actually verifying
+ * the cert - we're just building as much of the chain as we can
+ */
+ (void)X509_verify_cert(xs_ctx);
+ /* Don't leave errors in the queue */
+ ERR_clear_error();
+ chain = X509_STORE_CTX_get0_chain(xs_ctx);
+ i = ssl_security_cert_chain(s, chain, NULL, 0);
+ if (i != 1) {
+#if 0
+ /* Dummy error calls so mkerr generates them */
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
+#endif
+ X509_STORE_CTX_free(xs_ctx);
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
+ goto err;
+ }
+ chain_count = sk_X509_num(chain);
+ for (i = 0; i < chain_count; i++) {
+ x = sk_X509_value(chain, i);
+
+ if (!ssl_add_cert_to_wpacket(s, pkt, x, i, &tmpal)) {
+ X509_STORE_CTX_free(xs_ctx);
+ goto err;
+ }
+ }
+ X509_STORE_CTX_free(xs_ctx);
+ } else {
+ i = ssl_security_cert_chain(s, extra_certs, x, 0);
+ if (i != 1) {
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
+ goto err;
+ }
+ if (!ssl_add_cert_to_wpacket(s, pkt, x, 0, &tmpal))
+ goto err;
+ for (i = 0; i < sk_X509_num(extra_certs); i++) {
+ x = sk_X509_value(extra_certs, i);
+ if (!ssl_add_cert_to_wpacket(s, pkt, x, i + 1, &tmpal))
+ goto err;
+ }
+ }
+ return 1;
+
+ err:
+ *al = tmpal;
+ return 0;
+}
+
+unsigned long ssl3_output_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk,
+ int *al)
+{
+ int tmpal = SSL_AD_INTERNAL_ERROR;
+
if (!WPACKET_start_sub_packet_u24(pkt)
- || !ssl_add_cert_chain(s, pkt, cpk)
+ || !ssl_add_cert_chain(s, pkt, cpk, &tmpal)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR);
+ *al = tmpal;
return 0;
}
return 1;
}
-WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst)
+/*
+ * Tidy up after the end of a handshake. In the case of SCTP this may result
+ * 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)
{
void (*cb) (const SSL *ssl, int type, int val) = NULL;
}
#endif
- /* clean a few things up */
- ssl3_cleanup_key_block(s);
-
- if (!SSL_IS_DTLS(s)) {
- /*
- * We don't do this in DTLS because we may still need the init_buf
- * in case there are any unexpected retransmits
- */
- BUF_MEM_free(s->init_buf);
- s->init_buf = NULL;
+ if (clearbufs) {
+ if (!SSL_IS_DTLS(s)) {
+ /*
+ * We don't do this in DTLS because we may still need the init_buf
+ * in case there are any unexpected retransmits
+ */
+ BUF_MEM_free(s->init_buf);
+ s->init_buf = NULL;
+ }
+ if (!ssl_free_wbio_buffer(s))
+ return WORK_ERROR;
+ s->init_num = 0;
}
- ssl_free_wbio_buffer(s);
-
- s->init_num = 0;
-
- if (!s->server || s->renegotiate == 2) {
+ if (s->statem.cleanuphand) {
/* skipped if we just sent a HelloRequest */
s->renegotiate = 0;
s->new_session = 0;
+ s->statem.cleanuphand = 0;
+
+ ssl3_cleanup_key_block(s);
if (s->server) {
ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
}
}
+ /*
+ * If we've not cleared the buffers its because we've got more work to do,
+ * so continue.
+ */
+ if (!clearbufs)
+ return WORK_FINISHED_CONTINUE;
+
+ ossl_statem_set_in_init(s, 0);
return WORK_FINISHED_STOP;
}
skip_message = 0;
if (!s->server)
- if (p[0] == SSL3_MT_HELLO_REQUEST)
+ if (s->statem.hand_state != TLS_ST_OK
+ && p[0] == SSL3_MT_HELLO_REQUEST)
/*
* The server may always send 'Hello Request' messages --
* we are doing a handshake anyway now, so ignore them if
s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data,
(size_t)s->init_num, s, s->msg_callback_arg);
} else {
- if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
- s->init_num + SSL3_HM_HEADER_LENGTH)) {
+ /*
+ * We defer feeding in the HRR until later. We'll do it as part of
+ * processing the 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)) {
SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_EVP_LIB);
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
*len = 0;
default:
return -1;
case EVP_PKEY_RSA:
- return SSL_PKEY_RSA_ENC;
+ return SSL_PKEY_RSA;
case EVP_PKEY_DSA:
return SSL_PKEY_DSA_SIGN;
#ifndef OPENSSL_NO_EC
case EVP_PKEY_EC:
return SSL_PKEY_ECC;
+ case EVP_PKEY_ED25519:
+ return SSL_PKEY_ED25519;
#endif
#ifndef OPENSSL_NO_GOST
case NID_id_GostR3410_2001:
# error Code needs update for TLS_method() support beyond TLS1_3_VERSION.
#endif
+/* Must be in order high to low */
static const version_info tls_version_table[] = {
#ifndef OPENSSL_NO_TLS1_3
{TLS1_3_VERSION, tlsv1_3_client_method, tlsv1_3_server_method},
# error Code needs update for DTLS_method() support beyond DTLS1_2_VERSION.
#endif
+/* Must be in order high to low */
static const version_info dtls_version_table[] = {
#ifndef OPENSSL_NO_DTLS1_2
{DTLS1_2_VERSION, dtlsv1_2_client_method, dtlsv1_2_server_method},
return SSL_R_UNSUPPORTED_PROTOCOL;
if ((method->flags & SSL_METHOD_NO_SUITEB) != 0 && tls1_suiteb(s))
return SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE;
- else if ((method->flags & SSL_METHOD_NO_FIPS) != 0 && FIPS_mode())
- return SSL_R_AT_LEAST_TLS_1_0_NEEDED_IN_FIPS_MODE;
return 0;
}
return 1;
}
+static void check_for_downgrade(SSL *s, int vers, DOWNGRADE *dgrd)
+{
+ if (vers == TLS1_2_VERSION
+ && ssl_version_supported(s, TLS1_3_VERSION)) {
+ *dgrd = DOWNGRADE_TO_1_2;
+ } else if (!SSL_IS_DTLS(s) && vers < TLS1_2_VERSION
+ && (ssl_version_supported(s, TLS1_2_VERSION)
+ || ssl_version_supported(s, TLS1_3_VERSION))) {
+ *dgrd = DOWNGRADE_TO_1_1;
+ } else {
+ *dgrd = DOWNGRADE_NONE;
+ }
+}
+
/*
* ssl_choose_server_version - Choose server (D)TLS version. Called when the
* client HELLO is received to select the final server protocol version and
*
* Returns 0 on success or an SSL error reason number on failure.
*/
-int ssl_choose_server_version(SSL *s, CLIENTHELLO_MSG *hello)
+int ssl_choose_server_version(SSL *s, CLIENTHELLO_MSG *hello, DOWNGRADE *dgrd)
{
/*-
* With version-flexible methods we have an initial state with:
* handle version.
*/
int server_version = s->method->version;
- int client_version = hello->version;
+ int client_version = hello->legacy_version;
const version_info *vent;
const version_info *table;
int disabled = 0;
+ RAW_EXTENSION *suppversions;
s->client_version = client_version;
switch (server_version) {
default:
- if (version_cmp(s, client_version, s->version) < 0)
- return SSL_R_WRONG_SSL_VERSION;
+ if (!SSL_IS_TLS13(s)) {
+ if (version_cmp(s, client_version, s->version) < 0)
+ return SSL_R_WRONG_SSL_VERSION;
+ *dgrd = DOWNGRADE_NONE;
+ /*
+ * If this SSL handle is not from a version flexible method we don't
+ * (and never did) check min/max FIPS or Suite B constraints. Hope
+ * that's OK. It is up to the caller to not choose fixed protocol
+ * versions they don't want. If not, then easy to fix, just return
+ * ssl_method_error(s, s->method)
+ */
+ return 0;
+ }
/*
- * If this SSL handle is not from a version flexible method we don't
- * (and never did) check min/max FIPS or Suite B constraints. Hope
- * that's OK. It is up to the caller to not choose fixed protocol
- * versions they don't want. If not, then easy to fix, just return
- * ssl_method_error(s, s->method)
+ * Fall through if we are TLSv1.3 already (this means we must be after
+ * a HelloRetryRequest
*/
- return 0;
+ /* fall thru */
case TLS_ANY_VERSION:
table = tls_version_table;
break;
break;
}
+ suppversions = &hello->pre_proc_exts[TLSEXT_IDX_supported_versions];
+
+ if (suppversions->present && !SSL_IS_DTLS(s)) {
+ unsigned int candidate_vers = 0;
+ unsigned int best_vers = 0;
+ const SSL_METHOD *best_method = NULL;
+ PACKET versionslist;
+
+ suppversions->parsed = 1;
+
+ if (!PACKET_as_length_prefixed_1(&suppversions->data, &versionslist)) {
+ /* Trailing or invalid data? */
+ return SSL_R_LENGTH_MISMATCH;
+ }
+
+ while (PACKET_get_net_2(&versionslist, &candidate_vers)) {
+ /* TODO(TLS1.3): Remove this before release */
+ if (candidate_vers == TLS1_3_VERSION_DRAFT)
+ candidate_vers = TLS1_3_VERSION;
+ /*
+ * TODO(TLS1.3): There is some discussion on the TLS list about
+ * whether to ignore versions <TLS1.2 in supported_versions. At the
+ * moment we honour them if present. To be reviewed later
+ */
+ if (version_cmp(s, candidate_vers, best_vers) <= 0)
+ continue;
+ for (vent = table;
+ vent->version != 0 && vent->version != (int)candidate_vers;
+ ++vent)
+ continue;
+ if (vent->version != 0 && vent->smeth != NULL) {
+ const SSL_METHOD *method;
+
+ method = vent->smeth();
+ if (ssl_method_error(s, method) == 0) {
+ best_vers = candidate_vers;
+ best_method = method;
+ }
+ }
+ }
+ if (PACKET_remaining(&versionslist) != 0) {
+ /* Trailing data? */
+ return SSL_R_LENGTH_MISMATCH;
+ }
+
+ if (best_vers > 0) {
+ if (SSL_IS_TLS13(s)) {
+ /*
+ * We get here if this is after a HelloRetryRequest. In this
+ * case we just check that we still negotiated TLSv1.3
+ */
+ if (best_vers != TLS1_3_VERSION)
+ return SSL_R_UNSUPPORTED_PROTOCOL;
+ return 0;
+ }
+ check_for_downgrade(s, best_vers, dgrd);
+ s->version = best_vers;
+ s->method = best_method;
+ return 0;
+ }
+ return SSL_R_UNSUPPORTED_PROTOCOL;
+ }
+
+ /*
+ * If the supported versions extension isn't present, then the highest
+ * version we can negotiate is TLSv1.2
+ */
+ if (version_cmp(s, client_version, TLS1_3_VERSION) >= 0)
+ client_version = TLS1_2_VERSION;
+
+ /*
+ * No supported versions extension, so we just use the version supplied in
+ * the ClientHello.
+ */
for (vent = table; vent->version != 0; ++vent) {
const SSL_METHOD *method;
continue;
method = vent->smeth();
if (ssl_method_error(s, method) == 0) {
+ check_for_downgrade(s, vent->version, dgrd);
s->version = vent->version;
s->method = method;
return 0;
*
* @s: client SSL handle.
* @version: The proposed version from the server's HELLO.
+ * @checkdgrd: Whether to check the downgrade sentinels in the server_random
+ * @al: Where to store any alert value that may be generated
*
* Returns 0 on success or an SSL error reason number on failure.
*/
-int ssl_choose_client_version(SSL *s, int version)
+int ssl_choose_client_version(SSL *s, int version, int checkdgrd, int *al)
{
const version_info *vent;
const version_info *table;
+ int highver = 0;
+
+ /* TODO(TLS1.3): Remove this before release */
+ if (version == TLS1_3_VERSION_DRAFT)
+ version = TLS1_3_VERSION;
+
+ if (s->hello_retry_request && version != TLS1_3_VERSION) {
+ *al = SSL_AD_PROTOCOL_VERSION;
+ return SSL_R_WRONG_SSL_VERSION;
+ }
switch (s->method->version) {
default:
- if (version != s->version)
+ if (version != s->version) {
+ *al = SSL_AD_PROTOCOL_VERSION;
return SSL_R_WRONG_SSL_VERSION;
+ }
/*
* If this SSL handle is not from a version flexible method we don't
* (and never did) check min/max, FIPS or Suite B constraints. Hope
const SSL_METHOD *method;
int err;
- if (version != vent->version)
- continue;
if (vent->cmeth == NULL)
- break;
+ continue;
+
+ if (highver != 0 && version != vent->version)
+ continue;
+
method = vent->cmeth();
err = ssl_method_error(s, method);
- if (err != 0)
- return err;
+ if (err != 0) {
+ if (version == vent->version) {
+ *al = SSL_AD_PROTOCOL_VERSION;
+ return err;
+ }
+
+ continue;
+ }
+ if (highver == 0)
+ highver = vent->version;
+
+ if (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) {
+ *al = SSL_AD_ILLEGAL_PARAMETER;
+ return SSL_R_INAPPROPRIATE_FALLBACK;
+ }
+ } 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) {
+ *al = SSL_AD_ILLEGAL_PARAMETER;
+ return SSL_R_INAPPROPRIATE_FALLBACK;
+ }
+ }
+ }
+#endif
+
s->method = method;
s->version = version;
return 0;
}
+ *al = SSL_AD_PROTOCOL_VERSION;
return SSL_R_UNSUPPORTED_PROTOCOL;
}
/*
- * ssl_get_client_min_max_version - get minimum and maximum client version
+ * ssl_get_min_max_version - get minimum and maximum protocol version
* @s: The SSL connection
* @min_version: The minimum supported version
* @max_version: The maximum supported version
* Work out what version we should be using for the initial ClientHello if the
* version is initially (D)TLS_ANY_VERSION. We apply any explicit SSL_OP_NO_xxx
* options, the MinProtocol and MaxProtocol configuration commands, any Suite B
- * or FIPS_mode() constraints and any floor imposed by the security level here,
+ * constraints and any floor imposed by the security level here,
* so we don't advertise the wrong protocol version to only reject the outcome later.
*
* Computing the right floor matters. If, e.g., TLS 1.0 and 1.2 are enabled,
* Returns 0 on success or an SSL error reason number on failure. On failure
* min_version and max_version will also be set to 0.
*/
-int ssl_get_client_min_max_version(const SSL *s, int *min_version,
- int *max_version)
+int ssl_get_min_max_version(const SSL *s, int *min_version, int *max_version)
{
int version;
int hole;
/*
* ssl_set_client_hello_version - Work out what version we should be using for
- * the initial ClientHello.
+ * the initial ClientHello.legacy_version field.
*
* @s: client SSL handle.
*
{
int ver_min, ver_max, ret;
- ret = ssl_get_client_min_max_version(s, &ver_min, &ver_max);
+ ret = ssl_get_min_max_version(s, &ver_min, &ver_max);
if (ret != 0)
return ret;
- s->client_version = s->version = ver_max;
+ s->version = ver_max;
+
+ /* TLS1.3 always uses TLS1.2 in the legacy_version field */
+ if (!SSL_IS_DTLS(s) && ver_max > TLS1_2_VERSION)
+ ver_max = TLS1_2_VERSION;
+
+ s->client_version = ver_max;
+ return 0;
+}
+
+/*
+ * Checks a list of |groups| to determine if the |group_id| is in it. If it is
+ * and |checkallow| is 1 then additionally check if the group is allowed to be
+ * used. Returns 1 if the group is in the list (and allowed if |checkallow| is
+ * 1) or 0 otherwise.
+ */
+#ifndef OPENSSL_NO_EC
+int check_in_list(SSL *s, unsigned int group_id, const unsigned char *groups,
+ size_t num_groups, int checkallow)
+{
+ size_t i;
+
+ if (groups == NULL || num_groups == 0)
+ return 0;
+
+ for (i = 0; i < num_groups; i++, groups += 2) {
+ if (group_id == GET_GROUP_ID(groups, 0)
+ && (!checkallow
+ || tls_curve_allowed(s, groups, SSL_SECOP_CURVE_CHECK))) {
+ return 1;
+ }
+ }
+
return 0;
}
+#endif
+
+/* Replace ClientHello1 in the transcript hash with a synthetic message */
+int create_synthetic_message_hash(SSL *s)
+{
+ unsigned char hashval[EVP_MAX_MD_SIZE];
+ size_t hashlen = 0;
+ 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)) {
+ SSLerr(SSL_F_CREATE_SYNTHETIC_MESSAGE_HASH, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ /* Reinitialise the transcript hash */
+ if (!ssl3_init_finished_mac(s))
+ return 0;
+
+ /* Inject the synthetic message_hash message */
+ msghdr[0] = SSL3_MT_MESSAGE_HASH;
+ msghdr[SSL3_HM_HEADER_LENGTH - 1] = hashlen;
+ if (!ssl3_finish_mac(s, msghdr, SSL3_HM_HEADER_LENGTH)
+ || !ssl3_finish_mac(s, hashval, hashlen)) {
+ SSLerr(SSL_F_CREATE_SYNTHETIC_MESSAGE_HASH, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
+{
+ return X509_NAME_cmp(*a, *b);
+}
+
+int parse_ca_names(SSL *s, PACKET *pkt, int *al)
+{
+ STACK_OF(X509_NAME) *ca_sk = sk_X509_NAME_new(ca_dn_cmp);
+ X509_NAME *xn = NULL;
+ PACKET cadns;
+
+ if (ca_sk == NULL) {
+ SSLerr(SSL_F_PARSE_CA_NAMES, ERR_R_MALLOC_FAILURE);
+ goto decerr;
+ }
+ /* get the CA RDNs */
+ if (!PACKET_get_length_prefixed_2(pkt, &cadns)) {
+ *al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_PARSE_CA_NAMES, SSL_R_LENGTH_MISMATCH);
+ goto decerr;
+ }
+
+ while (PACKET_remaining(&cadns)) {
+ const unsigned char *namestart, *namebytes;
+ unsigned int name_len;
+
+ if (!PACKET_get_net_2(&cadns, &name_len)
+ || !PACKET_get_bytes(&cadns, &namebytes, name_len)) {
+ SSLerr(SSL_F_PARSE_CA_NAMES, SSL_R_LENGTH_MISMATCH);
+ goto decerr;
+ }
+
+ namestart = namebytes;
+ if ((xn = d2i_X509_NAME(NULL, &namebytes, name_len)) == NULL) {
+ SSLerr(SSL_F_PARSE_CA_NAMES, ERR_R_ASN1_LIB);
+ goto decerr;
+ }
+ if (namebytes != (namestart + name_len)) {
+ SSLerr(SSL_F_PARSE_CA_NAMES, SSL_R_CA_DN_LENGTH_MISMATCH);
+ goto decerr;
+ }
+
+ if (!sk_X509_NAME_push(ca_sk, xn)) {
+ SSLerr(SSL_F_PARSE_CA_NAMES, ERR_R_MALLOC_FAILURE);
+ *al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ }
+ xn = NULL;
+ }
+
+ sk_X509_NAME_pop_free(s->s3->tmp.peer_ca_names, X509_NAME_free);
+ s->s3->tmp.peer_ca_names = ca_sk;
+
+ return 1;
+
+ decerr:
+ *al = SSL_AD_DECODE_ERROR;
+ err:
+ sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
+ X509_NAME_free(xn);
+ return 0;
+}
+
+int construct_ca_names(SSL *s, WPACKET *pkt)
+{
+ const STACK_OF(X509_NAME) *ca_sk = SSL_get0_CA_list(s);
+
+ /* Start sub-packet for client CA list */
+ if (!WPACKET_start_sub_packet_u16(pkt))
+ return 0;
+
+ if (ca_sk != NULL) {
+ int i;
+
+ for (i = 0; i < sk_X509_NAME_num(ca_sk); i++) {
+ unsigned char *namebytes;
+ X509_NAME *name = sk_X509_NAME_value(ca_sk, i);
+ int namelen;
+
+ if (name == NULL
+ || (namelen = i2d_X509_NAME(name, NULL)) < 0
+ || !WPACKET_sub_allocate_bytes_u16(pkt, namelen,
+ &namebytes)
+ || i2d_X509_NAME(name, &namebytes) != namelen) {
+ return 0;
+ }
+ }
+ }
+
+ if (!WPACKET_close(pkt))
+ return 0;
+
+ return 1;
+}
+
+/* Create a buffer containing data to be signed for server key exchange */
+size_t construct_key_exchange_tbs(const SSL *s, unsigned char **ptbs,
+ const void *param, size_t paramlen)
+{
+ size_t tbslen = 2 * SSL3_RANDOM_SIZE + paramlen;
+ unsigned char *tbs = OPENSSL_malloc(tbslen);
+
+ if (tbs == NULL)
+ return 0;
+ memcpy(tbs, s->s3->client_random, SSL3_RANDOM_SIZE);
+ memcpy(tbs + SSL3_RANDOM_SIZE, s->s3->server_random, SSL3_RANDOM_SIZE);
+
+ memcpy(tbs + SSL3_RANDOM_SIZE * 2, param, paramlen);
+
+ *ptbs = tbs;
+ return tbslen;
+}
projects / openssl.git / blobdiff