diff options
Diffstat (limited to 'thirdparty/openssl/ssl/s23_clnt.c')
| -rw-r--r-- | thirdparty/openssl/ssl/s23_clnt.c | 802 |
1 files changed, 802 insertions, 0 deletions
diff --git a/thirdparty/openssl/ssl/s23_clnt.c b/thirdparty/openssl/ssl/s23_clnt.c new file mode 100644 index 0000000000..f782010c47 --- /dev/null +++ b/thirdparty/openssl/ssl/s23_clnt.c @@ -0,0 +1,802 @@ +/* ssl/s23_clnt.c */ +/* 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) 1998-2006 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). + * + */ + +#include <stdio.h> +#include "ssl_locl.h" +#include <openssl/buffer.h> +#include <openssl/rand.h> +#include <openssl/objects.h> +#include <openssl/evp.h> + +static const SSL_METHOD *ssl23_get_client_method(int ver); +static int ssl23_client_hello(SSL *s); +static int ssl23_get_server_hello(SSL *s); +static const SSL_METHOD *ssl23_get_client_method(int ver) +{ +#ifndef OPENSSL_NO_SSL2 + if (ver == SSL2_VERSION) + return (SSLv2_client_method()); +#endif +#ifndef OPENSSL_NO_SSL3 + if (ver == SSL3_VERSION) + return (SSLv3_client_method()); +#endif + if (ver == TLS1_VERSION) + return (TLSv1_client_method()); + else if (ver == TLS1_1_VERSION) + return (TLSv1_1_client_method()); + else if (ver == TLS1_2_VERSION) + return (TLSv1_2_client_method()); + else + return (NULL); +} + +IMPLEMENT_ssl23_meth_func(SSLv23_client_method, + ssl_undefined_function, + ssl23_connect, ssl23_get_client_method) + +int ssl23_connect(SSL *s) +{ + BUF_MEM *buf = NULL; + unsigned long Time = (unsigned long)time(NULL); + void (*cb) (const SSL *ssl, int type, int val) = NULL; + int ret = -1; + int new_state, state; + + RAND_add(&Time, sizeof(Time), 0); + ERR_clear_error(); + clear_sys_error(); + + if (s->info_callback != NULL) + cb = s->info_callback; + else if (s->ctx->info_callback != NULL) + cb = s->ctx->info_callback; + + s->in_handshake++; + if (!SSL_in_init(s) || SSL_in_before(s)) + SSL_clear(s); + + for (;;) { + state = s->state; + + switch (s->state) { + case SSL_ST_BEFORE: + case SSL_ST_CONNECT: + case SSL_ST_BEFORE | SSL_ST_CONNECT: + case SSL_ST_OK | SSL_ST_CONNECT: + + if (s->session != NULL) { + SSLerr(SSL_F_SSL23_CONNECT, + SSL_R_SSL23_DOING_SESSION_ID_REUSE); + ret = -1; + goto end; + } + s->server = 0; + if (cb != NULL) + cb(s, SSL_CB_HANDSHAKE_START, 1); + + /* s->version=TLS1_VERSION; */ + s->type = SSL_ST_CONNECT; + + if (s->init_buf == NULL) { + if ((buf = BUF_MEM_new()) == NULL) { + ret = -1; + goto end; + } + if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { + ret = -1; + goto end; + } + s->init_buf = buf; + buf = NULL; + } + + if (!ssl3_setup_buffers(s)) { + ret = -1; + goto end; + } + + ssl3_init_finished_mac(s); + + s->state = SSL23_ST_CW_CLNT_HELLO_A; + s->ctx->stats.sess_connect++; + s->init_num = 0; + break; + + case SSL23_ST_CW_CLNT_HELLO_A: + case SSL23_ST_CW_CLNT_HELLO_B: + + s->shutdown = 0; + ret = ssl23_client_hello(s); + if (ret <= 0) + goto end; + s->state = SSL23_ST_CR_SRVR_HELLO_A; + s->init_num = 0; + + break; + + case SSL23_ST_CR_SRVR_HELLO_A: + case SSL23_ST_CR_SRVR_HELLO_B: + ret = ssl23_get_server_hello(s); + if (ret >= 0) + cb = NULL; + goto end; + /* break; */ + + default: + SSLerr(SSL_F_SSL23_CONNECT, SSL_R_UNKNOWN_STATE); + ret = -1; + goto end; + /* break; */ + } + + if (s->debug) { + (void)BIO_flush(s->wbio); + } + + if ((cb != NULL) && (s->state != state)) { + new_state = s->state; + s->state = state; + cb(s, SSL_CB_CONNECT_LOOP, 1); + s->state = new_state; + } + } + end: + s->in_handshake--; + if (buf != NULL) + BUF_MEM_free(buf); + if (cb != NULL) + cb(s, SSL_CB_CONNECT_EXIT, ret); + return (ret); +} + +static int ssl23_no_ssl2_ciphers(SSL *s) +{ + SSL_CIPHER *cipher; + STACK_OF(SSL_CIPHER) *ciphers; + int i; + ciphers = SSL_get_ciphers(s); + for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) { + cipher = sk_SSL_CIPHER_value(ciphers, i); + if (cipher->algorithm_ssl == SSL_SSLV2) + return 0; + } + return 1; +} + +/* + * Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on + * failure, 1 on success. + */ +int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len) +{ + int send_time = 0; + if (len < 4) + return 0; + if (server) + send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0; + else + send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0; + if (send_time) { + unsigned long Time = (unsigned long)time(NULL); + unsigned char *p = result; + l2n(Time, p); + return RAND_pseudo_bytes(p, len - 4); + } else + return RAND_pseudo_bytes(result, len); +} + +static int ssl23_client_hello(SSL *s) +{ + unsigned char *buf; + unsigned char *p, *d; + int i, ch_len; + unsigned long l; + int ssl2_compat; + int version = 0, version_major, version_minor; + int al = 0; +#ifndef OPENSSL_NO_COMP + int j; + SSL_COMP *comp; +#endif + int ret; + unsigned long mask, options = s->options; + + ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1; + + if (ssl2_compat && ssl23_no_ssl2_ciphers(s)) + ssl2_compat = 0; + + /* + * SSL_OP_NO_X disables all protocols above X *if* there are + * some protocols below X enabled. This is required in order + * to maintain "version capability" vector contiguous. So + * that if application wants to disable TLS1.0 in favour of + * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the + * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. + */ + mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1 +#if !defined(OPENSSL_NO_SSL3) + | SSL_OP_NO_SSLv3 +#endif +#if !defined(OPENSSL_NO_SSL2) + | (ssl2_compat ? SSL_OP_NO_SSLv2 : 0) +#endif + ; +#if !defined(OPENSSL_NO_TLS1_2_CLIENT) + version = TLS1_2_VERSION; + + if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) + version = TLS1_1_VERSION; +#else + version = TLS1_1_VERSION; +#endif + mask &= ~SSL_OP_NO_TLSv1_1; + if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) + version = TLS1_VERSION; + mask &= ~SSL_OP_NO_TLSv1; +#if !defined(OPENSSL_NO_SSL3) + if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) + version = SSL3_VERSION; + mask &= ~SSL_OP_NO_SSLv3; +#endif +#if !defined(OPENSSL_NO_SSL2) + if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask) + version = SSL2_VERSION; +#endif + +#ifndef OPENSSL_NO_TLSEXT + if (version != SSL2_VERSION) { + /* + * have to disable SSL 2.0 compatibility if we need TLS extensions + */ + + if (s->tlsext_hostname != NULL) + ssl2_compat = 0; + if (s->tlsext_status_type != -1) + ssl2_compat = 0; +# ifdef TLSEXT_TYPE_opaque_prf_input + if (s->ctx->tlsext_opaque_prf_input_callback != 0 + || s->tlsext_opaque_prf_input != NULL) + ssl2_compat = 0; +# endif + if (s->cert->cli_ext.meths_count != 0) + ssl2_compat = 0; + } +#endif + + buf = (unsigned char *)s->init_buf->data; + if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { + /* + * Since we're sending s23 client hello, we're not reusing a session, as + * we'd be using the method from the saved session instead + */ + if (!ssl_get_new_session(s, 0)) { + return -1; + } + + p = s->s3->client_random; + if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) + return -1; + + if (version == TLS1_2_VERSION) { + version_major = TLS1_2_VERSION_MAJOR; + version_minor = TLS1_2_VERSION_MINOR; + } else if (tls1_suiteb(s)) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, + SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); + return -1; + } else if (version == TLS1_1_VERSION) { + version_major = TLS1_1_VERSION_MAJOR; + version_minor = TLS1_1_VERSION_MINOR; + } else if (version == TLS1_VERSION) { + version_major = TLS1_VERSION_MAJOR; + version_minor = TLS1_VERSION_MINOR; + } +#ifdef OPENSSL_FIPS + else if (FIPS_mode()) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, + SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); + return -1; + } +#endif + else if (version == SSL3_VERSION) { + version_major = SSL3_VERSION_MAJOR; + version_minor = SSL3_VERSION_MINOR; + } else if (version == SSL2_VERSION) { + version_major = SSL2_VERSION_MAJOR; + version_minor = SSL2_VERSION_MINOR; + } else { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE); + return (-1); + } + + s->client_version = version; + + if (ssl2_compat) { + /* create SSL 2.0 compatible Client Hello */ + + /* two byte record header will be written last */ + d = &(buf[2]); + p = d + 9; /* leave space for message type, version, + * individual length fields */ + + *(d++) = SSL2_MT_CLIENT_HELLO; + *(d++) = version_major; + *(d++) = version_minor; + + /* Ciphers supported */ + i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), p, 0); + if (i == 0) { + /* no ciphers */ + SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); + return -1; + } + s2n(i, d); + p += i; + + /* + * put in the session-id length (zero since there is no reuse) + */ + s2n(0, d); + + if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) + ch_len = SSL2_CHALLENGE_LENGTH; + else + ch_len = SSL2_MAX_CHALLENGE_LENGTH; + + /* write out sslv2 challenge */ + /* + * Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it + * is one of SSL2_MAX_CHALLENGE_LENGTH (32) or + * SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for + * futurproofing + */ + if (SSL3_RANDOM_SIZE < ch_len) + i = SSL3_RANDOM_SIZE; + else + i = ch_len; + s2n(i, d); + memset(&(s->s3->client_random[0]), 0, SSL3_RANDOM_SIZE); + if (RAND_pseudo_bytes + (&(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i) <= 0) + return -1; + + memcpy(p, &(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i); + p += i; + + i = p - &(buf[2]); + buf[0] = ((i >> 8) & 0xff) | 0x80; + buf[1] = (i & 0xff); + + /* number of bytes to write */ + s->init_num = i + 2; + s->init_off = 0; + + ssl3_finish_mac(s, &(buf[2]), i); + } else { + /* create Client Hello in SSL 3.0/TLS 1.0 format */ + + /* + * do the record header (5 bytes) and handshake message header (4 + * bytes) last + */ + d = p = &(buf[9]); + + *(p++) = version_major; + *(p++) = version_minor; + + /* Random stuff */ + memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); + p += SSL3_RANDOM_SIZE; + + /* Session ID (zero since there is no reuse) */ + *(p++) = 0; + + /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ + i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), + ssl3_put_cipher_by_char); + if (i == 0) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); + return -1; + } +#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH + /* + * Some servers hang if client hello > 256 bytes as hack + * workaround chop number of supported ciphers to keep it well + * below this if we use TLS v1.2 + */ + if (TLS1_get_version(s) >= TLS1_2_VERSION + && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) + i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; +#endif + s2n(i, p); + p += i; + + /* COMPRESSION */ +#ifdef OPENSSL_NO_COMP + *(p++) = 1; +#else + if ((s->options & SSL_OP_NO_COMPRESSION) + || !s->ctx->comp_methods) + j = 0; + else + j = sk_SSL_COMP_num(s->ctx->comp_methods); + *(p++) = 1 + j; + for (i = 0; i < j; i++) { + comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); + *(p++) = comp->id; + } +#endif + *(p++) = 0; /* Add the NULL method */ + +#ifndef OPENSSL_NO_TLSEXT + /* TLS extensions */ + if (ssl_prepare_clienthello_tlsext(s) <= 0) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); + return -1; + } + if ((p = + ssl_add_clienthello_tlsext(s, p, + buf + SSL3_RT_MAX_PLAIN_LENGTH, + &al)) == NULL) { + ssl3_send_alert(s, SSL3_AL_FATAL, al); + SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + return -1; + } +#endif + + l = p - d; + + /* fill in 4-byte handshake header */ + d = &(buf[5]); + *(d++) = SSL3_MT_CLIENT_HELLO; + l2n3(l, d); + + l += 4; + + if (l > SSL3_RT_MAX_PLAIN_LENGTH) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + return -1; + } + + /* fill in 5-byte record header */ + d = buf; + *(d++) = SSL3_RT_HANDSHAKE; + *(d++) = version_major; + /* + * Some servers hang if we use long client hellos and a record + * number > TLS 1.0. + */ + if (TLS1_get_client_version(s) > TLS1_VERSION) + *(d++) = 1; + else + *(d++) = version_minor; + s2n((int)l, d); + + /* number of bytes to write */ + s->init_num = p - buf; + s->init_off = 0; + + ssl3_finish_mac(s, &(buf[5]), s->init_num - 5); + } + + s->state = SSL23_ST_CW_CLNT_HELLO_B; + s->init_off = 0; + } + + /* SSL3_ST_CW_CLNT_HELLO_B */ + ret = ssl23_write_bytes(s); + + if ((ret >= 2) && s->msg_callback) { + /* Client Hello has been sent; tell msg_callback */ + + if (ssl2_compat) + s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data + 2, + ret - 2, s, s->msg_callback_arg); + else { + s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, + s, s->msg_callback_arg); + s->msg_callback(1, version, SSL3_RT_HANDSHAKE, + s->init_buf->data + 5, ret - 5, s, + s->msg_callback_arg); + } + } + + return ret; +} + +static int ssl23_get_server_hello(SSL *s) +{ + char buf[8]; + unsigned char *p; + int i; + int n; + + n = ssl23_read_bytes(s, 7); + + if (n != 7) + return (n); + p = s->packet; + + memcpy(buf, p, n); + + if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && + (p[5] == 0x00) && (p[6] == 0x02)) { +#ifdef OPENSSL_NO_SSL2 + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); + goto err; +#else + /* we are talking sslv2 */ + /* + * we need to clean up the SSLv3 setup and put in the sslv2 stuff. + */ + int ch_len; + + if (s->options & SSL_OP_NO_SSLv2) { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); + goto err; + } + if (s->s2 == NULL) { + if (!ssl2_new(s)) + goto err; + } else + ssl2_clear(s); + + if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) + ch_len = SSL2_CHALLENGE_LENGTH; + else + ch_len = SSL2_MAX_CHALLENGE_LENGTH; + + /* write out sslv2 challenge */ + /* + * Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it is + * one of SSL2_MAX_CHALLENGE_LENGTH (32) or SSL2_MAX_CHALLENGE_LENGTH + * (16), but leave the check in for futurproofing + */ + i = (SSL3_RANDOM_SIZE < ch_len) + ? SSL3_RANDOM_SIZE : ch_len; + s->s2->challenge_length = i; + memcpy(s->s2->challenge, + &(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i); + + if (s->s3 != NULL) + ssl3_free(s); + + if (!BUF_MEM_grow_clean(s->init_buf, + SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, ERR_R_BUF_LIB); + goto err; + } + + s->state = SSL2_ST_GET_SERVER_HELLO_A; + if (!(s->client_version == SSL2_VERSION)) + /* + * use special padding (SSL 3.0 draft/RFC 2246, App. E.2) + */ + s->s2->ssl2_rollback = 1; + + /* + * setup the 7 bytes we have read so we get them from the sslv2 + * buffer + */ + s->rstate = SSL_ST_READ_HEADER; + s->packet_length = n; + s->packet = &(s->s2->rbuf[0]); + memcpy(s->packet, buf, n); + s->s2->rbuf_left = n; + s->s2->rbuf_offs = 0; + + /* we have already written one */ + s->s2->write_sequence = 1; + + s->method = SSLv2_client_method(); + s->handshake_func = s->method->ssl_connect; +#endif + } else if (p[1] == SSL3_VERSION_MAJOR && + p[2] <= TLS1_2_VERSION_MINOR && + ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) || + (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) { + /* we have sslv3 or tls1 (server hello or alert) */ + +#ifndef OPENSSL_NO_SSL3 + if ((p[2] == SSL3_VERSION_MINOR) && !(s->options & SSL_OP_NO_SSLv3)) { +# ifdef OPENSSL_FIPS + if (FIPS_mode()) { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, + SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); + goto err; + } +# endif + s->version = SSL3_VERSION; + s->method = SSLv3_client_method(); + } else +#endif + if ((p[2] == TLS1_VERSION_MINOR) && !(s->options & SSL_OP_NO_TLSv1)) { + s->version = TLS1_VERSION; + s->method = TLSv1_client_method(); + } else if ((p[2] == TLS1_1_VERSION_MINOR) && + !(s->options & SSL_OP_NO_TLSv1_1)) { + s->version = TLS1_1_VERSION; + s->method = TLSv1_1_client_method(); + } else if ((p[2] == TLS1_2_VERSION_MINOR) && + !(s->options & SSL_OP_NO_TLSv1_2)) { + s->version = TLS1_2_VERSION; + s->method = TLSv1_2_client_method(); + } else { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); + goto err; + } + + s->session->ssl_version = s->version; + + /* ensure that TLS_MAX_VERSION is up-to-date */ + OPENSSL_assert(s->version <= TLS_MAX_VERSION); + + if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) { + /* fatal alert */ + + void (*cb) (const SSL *ssl, int type, int val) = NULL; + int j; + + if (s->info_callback != NULL) + cb = s->info_callback; + else if (s->ctx->info_callback != NULL) + cb = s->ctx->info_callback; + + i = p[5]; + if (cb != NULL) { + j = (i << 8) | p[6]; + cb(s, SSL_CB_READ_ALERT, j); + } + + if (s->msg_callback) { + s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, + s->msg_callback_arg); + s->msg_callback(0, s->version, SSL3_RT_ALERT, p + 5, 2, s, + s->msg_callback_arg); + } + + s->rwstate = SSL_NOTHING; + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_AD_REASON_OFFSET + p[6]); + goto err; + } + + if (!ssl_init_wbio_buffer(s, 1)) + goto err; + + /* we are in this state */ + s->state = SSL3_ST_CR_SRVR_HELLO_A; + + /* + * put the 7 bytes we have read into the input buffer for SSLv3 + */ + s->rstate = SSL_ST_READ_HEADER; + s->packet_length = n; + if (s->s3->rbuf.buf == NULL) + if (!ssl3_setup_read_buffer(s)) + goto err; + s->packet = &(s->s3->rbuf.buf[0]); + memcpy(s->packet, buf, n); + s->s3->rbuf.left = n; + s->s3->rbuf.offset = 0; + + s->handshake_func = s->method->ssl_connect; + } else { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNKNOWN_PROTOCOL); + goto err; + } + s->init_num = 0; + + return (SSL_connect(s)); + err: + return (-1); +} |