X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fstatem%2Fstatem_clnt.c;h=60aecdbb3cc3f4d7bc0c289f26cb05ae9b123d45;hp=8da3e9b622c53830c607d2c999d8c4329971836b;hb=05ec6a25f80ac8edfb7d7cb764d2dd68156a6965;hpb=c45d6b2b0dc9a0b191fc3dcaad8035addd1589e6 diff --git a/ssl/statem/statem_clnt.c b/ssl/statem/statem_clnt.c index 8da3e9b622..60aecdbb3c 100644 --- a/ssl/statem/statem_clnt.c +++ b/ssl/statem/statem_clnt.c @@ -1,112 +1,12 @@ -/* 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. * @@ -190,7 +90,6 @@ static ossl_inline int cert_req_allowed(SSL *s) * Return values are: * 1: Yes * 0: No - * -1: Error */ static int key_exchange_expected(SSL *s) { @@ -274,8 +173,6 @@ int ossl_statem_client_read_transition(SSL *s, int mt) } } 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) @@ -309,8 +206,6 @@ int ossl_statem_client_read_transition(SSL *s, int mt) 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) @@ -319,7 +214,7 @@ int ossl_statem_client_read_transition(SSL *s, int mt) st->hand_state = TLS_ST_CR_KEY_EXCH; return 1; } - return 0; + goto err; } /* Fall through */ @@ -329,7 +224,7 @@ int ossl_statem_client_read_transition(SSL *s, int mt) st->hand_state = TLS_ST_CR_CERT_REQ; return 1; } - return 0; + goto err; } /* Fall through */ @@ -370,7 +265,10 @@ int ossl_statem_client_read_transition(SSL *s, int mt) break; } + err: /* No valid transition found */ + ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); + SSLerr(SSL_F_READ_STATE_MACHINE, SSL_R_UNEXPECTED_MESSAGE); return 0; } @@ -491,13 +389,13 @@ WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) 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) { @@ -537,20 +435,9 @@ WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) switch(st->hand_state) { 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; @@ -773,6 +660,9 @@ WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) OSSL_STATEM *st = &s->statem; switch(st->hand_state) { + 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 */ @@ -1124,6 +1014,7 @@ MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) * overwritten if the server refuses resumption. */ if (s->session->session_id_length > 0) { + s->ctx->stats.sess_miss++; if (!ssl_get_new_session(s, 0)) { goto f_err; } @@ -1352,7 +1243,7 @@ MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) s->session->peer_chain = sk; /* * Inconsistency alert: cert_chain does include the peer's certificate, - * which we don't include in s3_srvr.c + * which we don't include in statem_srvr.c */ x = sk_X509_value(sk, 0); sk = NULL; @@ -1568,12 +1459,14 @@ MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); goto dherr; } + p = g = 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; } + bnpub_key = NULL; if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { al = SSL_AD_HANDSHAKE_FAILURE; @@ -1904,7 +1797,7 @@ MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) s->s3->tmp.ca_names = ca_sk; ca_sk = NULL; - ret = MSG_PROCESS_CONTINUE_READING; + ret = MSG_PROCESS_CONTINUE_PROCESSING; goto done; err: ossl_statem_set_error(s); @@ -1995,9 +1888,12 @@ MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) * 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); + if (!EVP_Digest(s->session->tlsext_tick, ticklen, + s->session->session_id, &s->session->session_id_length, + EVP_sha256(), NULL)) { + SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB); + goto err; + } return MSG_PROCESS_CONTINUE_READING; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); @@ -2116,426 +2012,483 @@ MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) return MSG_PROCESS_FINISHED_READING; } -int tls_construct_client_key_exchange(SSL *s) +static int tls_construct_cke_psk_preamble(SSL *s, unsigned char **p, + size_t *pskhdrlen, 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; + s2n(identitylen, *p); + memcpy(*p, identity, identitylen); + *pskhdrlen = 2 + identitylen; + *p += identitylen; + + 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, unsigned char **p, int *len, int *al) +{ #ifndef OPENSSL_NO_RSA unsigned char *q; 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)); - - 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_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); - - if (s->s3->tmp.psk == NULL) { - OPENSSL_cleanse(identity, sizeof(identity)); - goto memerr; - } - - 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; - } + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); + return 0; } - if (alg_k & SSL_kPSK) { - n = 0; - } else -#endif - /* Fool emacs indentation */ - if (0) { + 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; } -#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; - } + 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; + } - pms[0] = s->client_version >> 8; - pms[1] = s->client_version & 0xff; - if (RAND_bytes(pms + 2, pmslen - 2) <= 0) - goto err; + pms[0] = s->client_version >> 8; + pms[1] = s->client_version & 0xff; + if (RAND_bytes(pms + 2, pmslen - 2) <= 0) { + goto err; + } - 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; + 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_CKE_RSA, ERR_R_EVP_LIB); + goto err; + } + if (EVP_PKEY_encrypt(pctx, *p, &enclen, pms, pmslen) <= 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT); + goto err; + } + *len = 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; + if (s->options & SSL_OP_PKCS1_CHECK_1) + (*p)[1]++; + if (s->options & SSL_OP_PKCS1_CHECK_2) + tmp_buf[0] = 0x70; # endif - /* Fix buf for TLS and beyond */ - if (s->version > SSL3_VERSION) { - s2n(n, q); - n += 2; - } + /* Fix buf for TLS and beyond */ + if (s->version > SSL3_VERSION) { + s2n(*len, q); + *len += 2; } + + s->s3->tmp.pms = pms; + s->s3->tmp.pmslen = pmslen; + + return 1; + err: + OPENSSL_clear_free(pms, pmslen); + EVP_PKEY_CTX_free(pctx); + + return 0; +#else + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR); + *al = SSL_AD_INTERNAL_ERROR; + return 0; #endif -#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); +} - if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) { - SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; - } +static int tls_construct_cke_dhe(SSL *s, unsigned char **p, int *len, int *al) +{ +#ifndef OPENSSL_NO_DH + DH *dh_clnt = NULL; + const BIGNUM *pub_key; + EVP_PKEY *ckey = NULL, *skey = NULL; + skey = s->s3->peer_tmp; + if (skey == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); + return 0; + } + ckey = ssl_generate_pkey(skey, NID_undef); + dh_clnt = EVP_PKEY_get0_DH(ckey); - /* 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; + if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); EVP_PKEY_free(ckey); - ckey = NULL; + return 0; } + + /* send off the data */ + DH_get0_key(dh_clnt, &pub_key, NULL); + *len = BN_num_bytes(pub_key); + s2n(*len, *p); + BN_bn2bin(pub_key, *p); + *len += 2; + EVP_PKEY_free(ckey); + + return 1; +#else + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR); + *al = SSL_AD_INTERNAL_ERROR; + return 0; #endif +} +static int tls_construct_cke_ecdhe(SSL *s, unsigned char **p, int *len, int *al) +{ #ifndef OPENSSL_NO_EC - else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { + unsigned char *encodedPoint = NULL; + int encoded_pt_len = 0; + EVP_PKEY *ckey = NULL, *skey = NULL; - 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; - } + skey = s->s3->peer_tmp; + if ((skey == NULL) || EVP_PKEY_get0_EC_KEY(skey) == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); + return 0; + } - ckey = ssl_generate_pkey(skey, NID_undef); + ckey = ssl_generate_pkey(skey, NID_undef); - if (ssl_derive(s, ckey, skey) == 0) { - SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB); - goto err; - } + if (ssl_derive(s, ckey, skey) == 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_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); + /* Generate encoding of client key */ + encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey), + POINT_CONVERSION_UNCOMPRESSED, + &encodedPoint, NULL); - if (encoded_pt_len == 0) { - SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); - goto err; - } + if (encoded_pt_len == 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB); + goto err; + } - EVP_PKEY_free(ckey); - ckey = NULL; + EVP_PKEY_free(ckey); + ckey = NULL; - n = encoded_pt_len; + *len = encoded_pt_len; - *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; + /* length of encoded point */ + **p = *len; + *p += 1; + /* copy the point */ + memcpy(*p, encodedPoint, *len); + /* increment len to account for length field */ + *len += 1; - /* Free allocated memory */ - OPENSSL_free(encodedPoint); - } -#endif /* !OPENSSL_NO_EC */ + OPENSSL_free(encodedPoint); + + return 1; + err: + EVP_PKEY_free(ckey); + return 0; +#else + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR); + *al = SSL_AD_INTERNAL_ERROR; + return 0; +#endif +} + +static int tls_construct_cke_gost(SSL *s, unsigned char **p, int *len, int *al) +{ #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; + /* 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; - /* - * 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; - } + if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) + dgst_nid = NID_id_GostR3411_2012_256; - 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 - */ + /* + * Get server sertificate 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; + } - /* Otherwise, generate ephemeral key pair */ + 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; + } + /* + * If we have send a certificate, and certificate key + * parameters match those of server certificate, use + * certificate key for key exchange + */ - 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; + /* 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); + return 0; + } + + if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0 + /* Generate session key */ + || RAND_bytes(pms, pmslen) <= 0) { + *al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, 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(); } - EVP_PKEY_CTX_free(pkey_ctx); + } + /* + * 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 + */ + *((*p)++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; + 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; + } + if (msglen >= 0x80) { + *((*p)++) = 0x81; + *((*p)++) = msglen & 0xff; + *len = msglen + 3; + } else { + *((*p)++) = msglen & 0xff; + *len = 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); + 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, unsigned char **p, int *len, int *al) +{ +#ifndef OPENSSL_NO_SRT + if (s->srp_ctx.A != NULL) { + /* send off the data */ + *len = BN_num_bytes(s->srp_ctx.A); + s2n(*len, *p); + BN_bn2bin(s->srp_ctx.A, *p); + *len += 2; + } else { + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); + return 0; } + 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; + } + + return 1; +#else + SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR); + *al = SSL_AD_INTERNAL_ERROR; + return 0; #endif -#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); +} + +int tls_construct_client_key_exchange(SSL *s) +{ + unsigned char *p; + int len; + size_t pskhdrlen = 0; + unsigned long alg_k; + int al = -1; + + alg_k = s->s3->tmp.new_cipher->algorithm_mkey; + + p = ssl_handshake_start(s); + + if ((alg_k & SSL_PSK) + && !tls_construct_cke_psk_preamble(s, &p, &pskhdrlen, &al)) + goto err; + + if (alg_k & SSL_kPSK) { + len = 0; + } else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { + if (!tls_construct_cke_rsa(s, &p, &len, &al)) 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); + } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { + if (!tls_construct_cke_dhe(s, &p, &len, &al)) goto err; - } - } -#endif - else { + } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { + if (!tls_construct_cke_ecdhe(s, &p, &len, &al)) + goto err; + } else if (alg_k & SSL_kGOST) { + if (!tls_construct_cke_gost(s, &p, &len, &al)) + goto err; + } else if (alg_k & SSL_kSRP) { + if (!tls_construct_cke_srp(s, &p, &len, &al)) + goto err; + } 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; } -#ifndef OPENSSL_NO_PSK - n += pskhdrlen; -#endif + len += pskhdrlen; - if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { + if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, len)) { 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;