| /* ssl/s2_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) 1998-2001 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 "ssl_locl.h" |
| #ifndef OPENSSL_NO_SSL2 |
| #include <openssl/opensslconf.h> |
| #if !defined(OPENSSL_SYS_STARBOARD) |
| # include <stdio.h> |
| #endif // !defined(OPENSSL_SYS_STARBOARD) |
| # include <openssl/rand.h> |
| # include <openssl/buffer.h> |
| # include <openssl/objects.h> |
| # include <openssl/evp.h> |
| |
| static const SSL_METHOD *ssl2_get_client_method(int ver); |
| static int get_server_finished(SSL *s); |
| static int get_server_verify(SSL *s); |
| static int get_server_hello(SSL *s); |
| static int client_hello(SSL *s); |
| static int client_master_key(SSL *s); |
| static int client_finished(SSL *s); |
| static int client_certificate(SSL *s); |
| static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, |
| unsigned char *to, int padding); |
| # define BREAK break |
| |
| static const SSL_METHOD *ssl2_get_client_method(int ver) |
| { |
| if (ver == SSL2_VERSION) |
| return (SSLv2_client_method()); |
| else |
| return (NULL); |
| } |
| |
| IMPLEMENT_ssl2_meth_func(SSLv2_client_method, |
| ssl_undefined_function, |
| ssl2_connect, ssl2_get_client_method) |
| |
| int ssl2_connect(SSL *s) |
| { |
| unsigned long l = (unsigned long)OPENSSL_port_time(NULL); |
| BUF_MEM *buf = NULL; |
| int ret = -1; |
| void (*cb) (const SSL *ssl, int type, int val) = NULL; |
| int new_state, state; |
| |
| RAND_add(&l, sizeof(l), 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; |
| |
| /* init things to blank */ |
| 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: |
| |
| s->server = 0; |
| if (cb != NULL) |
| cb(s, SSL_CB_HANDSHAKE_START, 1); |
| |
| s->version = SSL2_VERSION; |
| s->type = SSL_ST_CONNECT; |
| |
| buf = s->init_buf; |
| if ((buf == NULL) && ((buf = BUF_MEM_new()) == NULL)) { |
| ret = -1; |
| goto end; |
| } |
| if (!BUF_MEM_grow(buf, SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { |
| if (buf == s->init_buf) |
| buf = NULL; |
| ret = -1; |
| goto end; |
| } |
| s->init_buf = buf; |
| buf = NULL; |
| s->init_num = 0; |
| s->state = SSL2_ST_SEND_CLIENT_HELLO_A; |
| s->ctx->stats.sess_connect++; |
| s->handshake_func = ssl2_connect; |
| BREAK; |
| |
| case SSL2_ST_SEND_CLIENT_HELLO_A: |
| case SSL2_ST_SEND_CLIENT_HELLO_B: |
| s->shutdown = 0; |
| ret = client_hello(s); |
| if (ret <= 0) |
| goto end; |
| s->init_num = 0; |
| s->state = SSL2_ST_GET_SERVER_HELLO_A; |
| BREAK; |
| |
| case SSL2_ST_GET_SERVER_HELLO_A: |
| case SSL2_ST_GET_SERVER_HELLO_B: |
| ret = get_server_hello(s); |
| if (ret <= 0) |
| goto end; |
| s->init_num = 0; |
| if (!s->hit) { /* new session */ |
| s->state = SSL2_ST_SEND_CLIENT_MASTER_KEY_A; |
| BREAK; |
| } else { |
| s->state = SSL2_ST_CLIENT_START_ENCRYPTION; |
| break; |
| } |
| |
| case SSL2_ST_SEND_CLIENT_MASTER_KEY_A: |
| case SSL2_ST_SEND_CLIENT_MASTER_KEY_B: |
| ret = client_master_key(s); |
| if (ret <= 0) |
| goto end; |
| s->init_num = 0; |
| s->state = SSL2_ST_CLIENT_START_ENCRYPTION; |
| break; |
| |
| case SSL2_ST_CLIENT_START_ENCRYPTION: |
| /* |
| * Ok, we now have all the stuff needed to start encrypting, so |
| * lets fire it up :-) |
| */ |
| if (!ssl2_enc_init(s, 1)) { |
| ret = -1; |
| goto end; |
| } |
| s->s2->clear_text = 0; |
| s->state = SSL2_ST_SEND_CLIENT_FINISHED_A; |
| break; |
| |
| case SSL2_ST_SEND_CLIENT_FINISHED_A: |
| case SSL2_ST_SEND_CLIENT_FINISHED_B: |
| ret = client_finished(s); |
| if (ret <= 0) |
| goto end; |
| s->init_num = 0; |
| s->state = SSL2_ST_GET_SERVER_VERIFY_A; |
| break; |
| |
| case SSL2_ST_GET_SERVER_VERIFY_A: |
| case SSL2_ST_GET_SERVER_VERIFY_B: |
| ret = get_server_verify(s); |
| if (ret <= 0) |
| goto end; |
| s->init_num = 0; |
| s->state = SSL2_ST_GET_SERVER_FINISHED_A; |
| break; |
| |
| case SSL2_ST_GET_SERVER_FINISHED_A: |
| case SSL2_ST_GET_SERVER_FINISHED_B: |
| ret = get_server_finished(s); |
| if (ret <= 0) |
| goto end; |
| break; |
| |
| case SSL2_ST_SEND_CLIENT_CERTIFICATE_A: |
| case SSL2_ST_SEND_CLIENT_CERTIFICATE_B: |
| case SSL2_ST_SEND_CLIENT_CERTIFICATE_C: |
| case SSL2_ST_SEND_CLIENT_CERTIFICATE_D: |
| case SSL2_ST_X509_GET_CLIENT_CERTIFICATE: |
| ret = client_certificate(s); |
| if (ret <= 0) |
| goto end; |
| s->init_num = 0; |
| s->state = SSL2_ST_GET_SERVER_FINISHED_A; |
| break; |
| |
| case SSL_ST_OK: |
| if (s->init_buf != NULL) { |
| BUF_MEM_free(s->init_buf); |
| s->init_buf = NULL; |
| } |
| s->init_num = 0; |
| /* ERR_clear_error(); */ |
| |
| /* |
| * If we want to cache session-ids in the client and we |
| * successfully add the session-id to the cache, and there is a |
| * callback, then pass it out. 26/11/96 - eay - only add if not a |
| * re-used session. |
| */ |
| |
| ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
| if (s->hit) |
| s->ctx->stats.sess_hit++; |
| |
| ret = 1; |
| /* s->server=0; */ |
| s->ctx->stats.sess_connect_good++; |
| |
| if (cb != NULL) |
| cb(s, SSL_CB_HANDSHAKE_DONE, 1); |
| |
| goto end; |
| /* break; */ |
| default: |
| SSLerr(SSL_F_SSL2_CONNECT, SSL_R_UNKNOWN_STATE); |
| return (-1); |
| /* break; */ |
| } |
| |
| 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 get_server_hello(SSL *s) |
| { |
| unsigned char *buf; |
| unsigned char *p; |
| int i, j; |
| unsigned long len; |
| STACK_OF(SSL_CIPHER) *sk = NULL, *cl, *prio, *allow; |
| |
| buf = (unsigned char *)s->init_buf->data; |
| p = buf; |
| if (s->state == SSL2_ST_GET_SERVER_HELLO_A) { |
| i = ssl2_read(s, (char *)&(buf[s->init_num]), 11 - s->init_num); |
| if (i < (11 - s->init_num)) |
| return (ssl2_part_read(s, SSL_F_GET_SERVER_HELLO, i)); |
| s->init_num = 11; |
| |
| if (*(p++) != SSL2_MT_SERVER_HELLO) { |
| if (p[-1] != SSL2_MT_ERROR) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_READ_WRONG_PACKET_TYPE); |
| } else |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_PEER_ERROR); |
| return (-1); |
| } |
| # if 0 |
| s->hit = (*(p++)) ? 1 : 0; |
| /* |
| * Some [PPC?] compilers fail to increment p in above statement, e.g. |
| * one provided with Rhapsody 5.5, but most recent example XL C 11.1 |
| * for AIX, even without optimization flag... |
| */ |
| # else |
| s->hit = (*p) ? 1 : 0; |
| p++; |
| # endif |
| s->s2->tmp.cert_type = *(p++); |
| n2s(p, i); |
| if (i < s->version) |
| s->version = i; |
| n2s(p, i); |
| s->s2->tmp.cert_length = i; |
| n2s(p, i); |
| s->s2->tmp.csl = i; |
| n2s(p, i); |
| s->s2->tmp.conn_id_length = i; |
| s->state = SSL2_ST_GET_SERVER_HELLO_B; |
| } |
| |
| /* SSL2_ST_GET_SERVER_HELLO_B */ |
| len = |
| 11 + (unsigned long)s->s2->tmp.cert_length + |
| (unsigned long)s->s2->tmp.csl + |
| (unsigned long)s->s2->tmp.conn_id_length; |
| if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_MESSAGE_TOO_LONG); |
| return -1; |
| } |
| j = (int)len - s->init_num; |
| i = ssl2_read(s, (char *)&(buf[s->init_num]), j); |
| if (i != j) |
| return (ssl2_part_read(s, SSL_F_GET_SERVER_HELLO, i)); |
| if (s->msg_callback) { |
| /* SERVER-HELLO */ |
| s->msg_callback(0, s->version, 0, buf, (size_t)len, s, |
| s->msg_callback_arg); |
| } |
| |
| /* things are looking good */ |
| |
| p = buf + 11; |
| if (s->hit) { |
| if (s->s2->tmp.cert_length != 0) { |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_REUSE_CERT_LENGTH_NOT_ZERO); |
| return (-1); |
| } |
| if (s->s2->tmp.cert_type != 0) { |
| if (!(s->options & SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) { |
| SSLerr(SSL_F_GET_SERVER_HELLO, |
| SSL_R_REUSE_CERT_TYPE_NOT_ZERO); |
| return (-1); |
| } |
| } |
| if (s->s2->tmp.csl != 0) { |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_REUSE_CIPHER_LIST_NOT_ZERO); |
| return (-1); |
| } |
| } else { |
| # ifdef undef |
| /* very bad */ |
| OPENSSL_port_memset(s->session->session_id, 0, |
| SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES); |
| s->session->session_id_length = 0; |
| */ |
| # endif |
| /* |
| * we need to do this in case we were trying to reuse a client |
| * session but others are already reusing it. If this was a new |
| * 'blank' session ID, the session-id length will still be 0 |
| */ |
| if (s->session->session_id_length > 0) { |
| if (!ssl_get_new_session(s, 0)) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| return (-1); |
| } |
| } |
| |
| if (ssl2_set_certificate(s, s->s2->tmp.cert_type, |
| s->s2->tmp.cert_length, p) <= 0) { |
| ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE); |
| return (-1); |
| } |
| p += s->s2->tmp.cert_length; |
| |
| if (s->s2->tmp.csl == 0) { |
| ssl2_return_error(s, SSL2_PE_NO_CIPHER); |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_NO_CIPHER_LIST); |
| return (-1); |
| } |
| |
| /* |
| * We have just received a list of ciphers back from the server. We |
| * need to get the ones that match, then select the one we want the |
| * most :-). |
| */ |
| |
| /* load the ciphers */ |
| sk = ssl_bytes_to_cipher_list(s, p, s->s2->tmp.csl, |
| &s->session->ciphers); |
| p += s->s2->tmp.csl; |
| if (sk == NULL) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_MALLOC_FAILURE); |
| return (-1); |
| } |
| |
| (void)sk_SSL_CIPHER_set_cmp_func(sk, ssl_cipher_ptr_id_cmp); |
| |
| /* get the array of ciphers we will accept */ |
| cl = SSL_get_ciphers(s); |
| (void)sk_SSL_CIPHER_set_cmp_func(cl, ssl_cipher_ptr_id_cmp); |
| |
| /* |
| * If server preference flag set, choose the first |
| * (highest priority) cipher the server sends, otherwise |
| * client preference has priority. |
| */ |
| if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { |
| prio = sk; |
| allow = cl; |
| } else { |
| prio = cl; |
| allow = sk; |
| } |
| /* |
| * In theory we could have ciphers sent back that we don't want to |
| * use but that does not matter since we will check against the list |
| * we originally sent and for performance reasons we should not |
| * bother to match the two lists up just to check. |
| */ |
| for (i = 0; i < sk_SSL_CIPHER_num(prio); i++) { |
| if (sk_SSL_CIPHER_find(allow, sk_SSL_CIPHER_value(prio, i)) >= 0) |
| break; |
| } |
| |
| if (i >= sk_SSL_CIPHER_num(prio)) { |
| ssl2_return_error(s, SSL2_PE_NO_CIPHER); |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_NO_CIPHER_MATCH); |
| return (-1); |
| } |
| s->session->cipher = sk_SSL_CIPHER_value(prio, i); |
| |
| if (s->session->peer != NULL) { /* can't happen */ |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
| return (-1); |
| } |
| |
| s->session->peer = s->session->sess_cert->peer_key->x509; |
| /* peer_key->x509 has been set by ssl2_set_certificate. */ |
| CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); |
| } |
| |
| if (s->session->sess_cert == NULL |
| || s->session->peer != s->session->sess_cert->peer_key->x509) |
| /* can't happen */ |
| { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
| return (-1); |
| } |
| |
| s->s2->conn_id_length = s->s2->tmp.conn_id_length; |
| if (s->s2->conn_id_length > sizeof s->s2->conn_id) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG); |
| return -1; |
| } |
| OPENSSL_port_memcpy(s->s2->conn_id, p, s->s2->tmp.conn_id_length); |
| return (1); |
| } |
| |
| static int client_hello(SSL *s) |
| { |
| unsigned char *buf; |
| unsigned char *p, *d; |
| /* CIPHER **cipher;*/ |
| int i, n, j; |
| |
| buf = (unsigned char *)s->init_buf->data; |
| if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) { |
| if ((s->session == NULL) || (s->session->ssl_version != s->version)) { |
| if (!ssl_get_new_session(s, 0)) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| return (-1); |
| } |
| } |
| /* else use the pre-loaded session */ |
| |
| p = buf; /* header */ |
| d = p + 9; /* data section */ |
| *(p++) = SSL2_MT_CLIENT_HELLO; /* type */ |
| s2n(SSL2_VERSION, p); /* version */ |
| n = j = 0; |
| |
| n = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), d, 0); |
| d += n; |
| |
| if (n == 0) { |
| SSLerr(SSL_F_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); |
| return (-1); |
| } |
| |
| s2n(n, p); /* cipher spec num bytes */ |
| |
| if ((s->session->session_id_length > 0) && |
| (s->session->session_id_length <= |
| SSL2_MAX_SSL_SESSION_ID_LENGTH)) { |
| i = s->session->session_id_length; |
| s2n(i, p); /* session id length */ |
| OPENSSL_port_memcpy(d, s->session->session_id, (unsigned int)i); |
| d += i; |
| } else { |
| s2n(0, p); |
| } |
| |
| s->s2->challenge_length = SSL2_CHALLENGE_LENGTH; |
| s2n(SSL2_CHALLENGE_LENGTH, p); /* challenge length */ |
| /* |
| * challenge id data |
| */ |
| if (RAND_pseudo_bytes(s->s2->challenge, SSL2_CHALLENGE_LENGTH) <= 0) |
| return -1; |
| OPENSSL_port_memcpy(d, s->s2->challenge, SSL2_CHALLENGE_LENGTH); |
| d += SSL2_CHALLENGE_LENGTH; |
| |
| s->state = SSL2_ST_SEND_CLIENT_HELLO_B; |
| s->init_num = d - buf; |
| s->init_off = 0; |
| } |
| /* SSL2_ST_SEND_CLIENT_HELLO_B */ |
| return (ssl2_do_write(s)); |
| } |
| |
| static int client_master_key(SSL *s) |
| { |
| unsigned char *buf; |
| unsigned char *p, *d; |
| int clear, enc, karg, i; |
| SSL_SESSION *sess; |
| const EVP_CIPHER *c; |
| const EVP_MD *md; |
| |
| buf = (unsigned char *)s->init_buf->data; |
| if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) { |
| |
| if (!ssl_cipher_get_evp(s->session, &c, &md, NULL, NULL, NULL)) { |
| ssl2_return_error(s, SSL2_PE_NO_CIPHER); |
| SSLerr(SSL_F_CLIENT_MASTER_KEY, |
| SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); |
| return (-1); |
| } |
| sess = s->session; |
| p = buf; |
| d = p + 10; |
| *(p++) = SSL2_MT_CLIENT_MASTER_KEY; /* type */ |
| |
| i = ssl_put_cipher_by_char(s, sess->cipher, p); |
| p += i; |
| |
| /* make key_arg data */ |
| i = EVP_CIPHER_iv_length(c); |
| sess->key_arg_length = i; |
| if (i > SSL_MAX_KEY_ARG_LENGTH) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); |
| return -1; |
| } |
| if (i > 0) |
| if (RAND_pseudo_bytes(sess->key_arg, i) <= 0) |
| return -1; |
| |
| /* make a master key */ |
| i = EVP_CIPHER_key_length(c); |
| sess->master_key_length = i; |
| if (i > 0) { |
| if (i > (int)sizeof(sess->master_key)) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); |
| return -1; |
| } |
| if (RAND_bytes(sess->master_key, i) <= 0) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| return (-1); |
| } |
| } |
| |
| if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) |
| enc = 8; |
| else if (SSL_C_IS_EXPORT(sess->cipher)) |
| enc = 5; |
| else |
| enc = i; |
| |
| if ((int)i < enc) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_CIPHER_TABLE_SRC_ERROR); |
| return (-1); |
| } |
| clear = i - enc; |
| s2n(clear, p); |
| OPENSSL_port_memcpy(d, sess->master_key, (unsigned int)clear); |
| d += clear; |
| |
| enc = ssl_rsa_public_encrypt(sess->sess_cert, enc, |
| &(sess->master_key[clear]), d, |
| (s-> |
| s2->ssl2_rollback) ? RSA_SSLV23_PADDING |
| : RSA_PKCS1_PADDING); |
| if (enc <= 0) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_PUBLIC_KEY_ENCRYPT_ERROR); |
| return (-1); |
| } |
| # ifdef PKCS1_CHECK |
| if (s->options & SSL_OP_PKCS1_CHECK_1) |
| d[1]++; |
| if (s->options & SSL_OP_PKCS1_CHECK_2) |
| sess->master_key[clear]++; |
| # endif |
| s2n(enc, p); |
| d += enc; |
| karg = sess->key_arg_length; |
| s2n(karg, p); /* key arg size */ |
| if (karg > (int)sizeof(sess->key_arg)) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); |
| return -1; |
| } |
| OPENSSL_port_memcpy(d, sess->key_arg, (unsigned int)karg); |
| d += karg; |
| |
| s->state = SSL2_ST_SEND_CLIENT_MASTER_KEY_B; |
| s->init_num = d - buf; |
| s->init_off = 0; |
| } |
| |
| /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */ |
| return (ssl2_do_write(s)); |
| } |
| |
| static int client_finished(SSL *s) |
| { |
| unsigned char *p; |
| |
| if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) { |
| p = (unsigned char *)s->init_buf->data; |
| *(p++) = SSL2_MT_CLIENT_FINISHED; |
| if (s->s2->conn_id_length > sizeof s->s2->conn_id) { |
| SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); |
| return -1; |
| } |
| OPENSSL_port_memcpy(p, s->s2->conn_id, (unsigned int)s->s2->conn_id_length); |
| |
| s->state = SSL2_ST_SEND_CLIENT_FINISHED_B; |
| s->init_num = s->s2->conn_id_length + 1; |
| s->init_off = 0; |
| } |
| return (ssl2_do_write(s)); |
| } |
| |
| /* read the data and then respond */ |
| static int client_certificate(SSL *s) |
| { |
| unsigned char *buf; |
| unsigned char *p, *d; |
| int i; |
| unsigned int n; |
| int cert_ch_len; |
| unsigned char *cert_ch; |
| |
| buf = (unsigned char *)s->init_buf->data; |
| |
| /* |
| * We have a cert associated with the SSL, so attach it to the session if |
| * it does not have one |
| */ |
| |
| if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) { |
| i = ssl2_read(s, (char *)&(buf[s->init_num]), |
| SSL2_MAX_CERT_CHALLENGE_LENGTH + 2 - s->init_num); |
| if (i < (SSL2_MIN_CERT_CHALLENGE_LENGTH + 2 - s->init_num)) |
| return (ssl2_part_read(s, SSL_F_CLIENT_CERTIFICATE, i)); |
| s->init_num += i; |
| if (s->msg_callback) { |
| /* REQUEST-CERTIFICATE */ |
| s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, |
| s->msg_callback_arg); |
| } |
| |
| /* type=buf[0]; */ |
| /* type eq x509 */ |
| if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) { |
| ssl2_return_error(s, SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); |
| SSLerr(SSL_F_CLIENT_CERTIFICATE, SSL_R_BAD_AUTHENTICATION_TYPE); |
| return (-1); |
| } |
| |
| if ((s->cert == NULL) || |
| (s->cert->key->x509 == NULL) || |
| (s->cert->key->privatekey == NULL)) { |
| s->state = SSL2_ST_X509_GET_CLIENT_CERTIFICATE; |
| } else |
| s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_C; |
| } |
| |
| cert_ch = buf + 2; |
| cert_ch_len = s->init_num - 2; |
| |
| if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) { |
| X509 *x509 = NULL; |
| EVP_PKEY *pkey = NULL; |
| |
| /* |
| * If we get an error we need to ssl->rwstate=SSL_X509_LOOKUP; |
| * return(error); We should then be retried when things are ok and we |
| * can get a cert or not |
| */ |
| |
| i = 0; |
| if (s->ctx->client_cert_cb != NULL) { |
| i = s->ctx->client_cert_cb(s, &(x509), &(pkey)); |
| } |
| |
| if (i < 0) { |
| s->rwstate = SSL_X509_LOOKUP; |
| return (-1); |
| } |
| s->rwstate = SSL_NOTHING; |
| |
| if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { |
| s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_C; |
| if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) { |
| i = 0; |
| } |
| X509_free(x509); |
| EVP_PKEY_free(pkey); |
| } else if (i == 1) { |
| if (x509 != NULL) |
| X509_free(x509); |
| if (pkey != NULL) |
| EVP_PKEY_free(pkey); |
| SSLerr(SSL_F_CLIENT_CERTIFICATE, |
| SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
| i = 0; |
| } |
| |
| if (i == 0) { |
| /* |
| * We have no client certificate to respond with so send the |
| * correct error message back |
| */ |
| s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_B; |
| p = buf; |
| *(p++) = SSL2_MT_ERROR; |
| s2n(SSL2_PE_NO_CERTIFICATE, p); |
| s->init_off = 0; |
| s->init_num = 3; |
| /* Write is done at the end */ |
| } |
| } |
| |
| if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) { |
| return (ssl2_do_write(s)); |
| } |
| |
| if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) { |
| EVP_MD_CTX ctx; |
| |
| /* |
| * ok, now we calculate the checksum do it first so we can reuse buf |
| * :-) |
| */ |
| p = buf; |
| EVP_MD_CTX_init(&ctx); |
| EVP_SignInit_ex(&ctx, s->ctx->rsa_md5, NULL); |
| EVP_SignUpdate(&ctx, s->s2->key_material, s->s2->key_material_length); |
| EVP_SignUpdate(&ctx, cert_ch, (unsigned int)cert_ch_len); |
| i = i2d_X509(s->session->sess_cert->peer_key->x509, &p); |
| /* |
| * Don't update the signature if it fails - FIXME: probably should |
| * handle this better |
| */ |
| if (i > 0) |
| EVP_SignUpdate(&ctx, buf, (unsigned int)i); |
| |
| p = buf; |
| d = p + 6; |
| *(p++) = SSL2_MT_CLIENT_CERTIFICATE; |
| *(p++) = SSL2_CT_X509_CERTIFICATE; |
| n = i2d_X509(s->cert->key->x509, &d); |
| s2n(n, p); |
| |
| if (!EVP_SignFinal(&ctx, d, &n, s->cert->key->privatekey)) { |
| /* |
| * this is not good. If things have failed it means there so |
| * something wrong with the key. We will continue with a 0 length |
| * signature |
| */ |
| } |
| EVP_MD_CTX_cleanup(&ctx); |
| s2n(n, p); |
| d += n; |
| |
| s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_D; |
| s->init_num = d - buf; |
| s->init_off = 0; |
| } |
| /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */ |
| return (ssl2_do_write(s)); |
| } |
| |
| static int get_server_verify(SSL *s) |
| { |
| unsigned char *p; |
| int i, n, len; |
| |
| p = (unsigned char *)s->init_buf->data; |
| if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) { |
| i = ssl2_read(s, (char *)&(p[s->init_num]), 1 - s->init_num); |
| if (i < (1 - s->init_num)) |
| return (ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i)); |
| s->init_num += i; |
| |
| s->state = SSL2_ST_GET_SERVER_VERIFY_B; |
| if (*p != SSL2_MT_SERVER_VERIFY) { |
| if (p[0] != SSL2_MT_ERROR) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_READ_WRONG_PACKET_TYPE); |
| } else { |
| SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_PEER_ERROR); |
| /* try to read the error message */ |
| i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num); |
| return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i); |
| } |
| return (-1); |
| } |
| } |
| |
| p = (unsigned char *)s->init_buf->data; |
| len = 1 + s->s2->challenge_length; |
| n = len - s->init_num; |
| i = ssl2_read(s, (char *)&(p[s->init_num]), n); |
| if (i < n) |
| return (ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i)); |
| if (s->msg_callback) { |
| /* SERVER-VERIFY */ |
| s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); |
| } |
| p += 1; |
| |
| if (CRYPTO_memcmp(p, s->s2->challenge, s->s2->challenge_length) != 0) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_CHALLENGE_IS_DIFFERENT); |
| return (-1); |
| } |
| return (1); |
| } |
| |
| static int get_server_finished(SSL *s) |
| { |
| unsigned char *buf; |
| unsigned char *p; |
| int i, n, len; |
| |
| buf = (unsigned char *)s->init_buf->data; |
| p = buf; |
| if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) { |
| i = ssl2_read(s, (char *)&(buf[s->init_num]), 1 - s->init_num); |
| if (i < (1 - s->init_num)) |
| return (ssl2_part_read(s, SSL_F_GET_SERVER_FINISHED, i)); |
| s->init_num += i; |
| |
| if (*p == SSL2_MT_REQUEST_CERTIFICATE) { |
| s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_A; |
| return (1); |
| } else if (*p != SSL2_MT_SERVER_FINISHED) { |
| if (p[0] != SSL2_MT_ERROR) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_FINISHED, |
| SSL_R_READ_WRONG_PACKET_TYPE); |
| } else { |
| SSLerr(SSL_F_GET_SERVER_FINISHED, SSL_R_PEER_ERROR); |
| /* try to read the error message */ |
| i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num); |
| return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i); |
| } |
| return (-1); |
| } |
| s->state = SSL2_ST_GET_SERVER_FINISHED_B; |
| } |
| |
| len = 1 + SSL2_SSL_SESSION_ID_LENGTH; |
| n = len - s->init_num; |
| i = ssl2_read(s, (char *)&(buf[s->init_num]), n); |
| if (i < n) { |
| /* |
| * XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, |
| * that's the maximum |
| */ |
| return (ssl2_part_read(s, SSL_F_GET_SERVER_FINISHED, i)); |
| } |
| s->init_num += i; |
| if (s->msg_callback) { |
| /* SERVER-FINISHED */ |
| s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, |
| s->msg_callback_arg); |
| } |
| |
| if (!s->hit) { /* new session */ |
| /* new session-id */ |
| /* |
| * Make sure we were not trying to re-use an old SSL_SESSION or bad |
| * things can happen |
| */ |
| /* ZZZZZZZZZZZZZ */ |
| s->session->session_id_length = SSL2_SSL_SESSION_ID_LENGTH; |
| OPENSSL_port_memcpy(s->session->session_id, p + 1, SSL2_SSL_SESSION_ID_LENGTH); |
| } else { |
| if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) { |
| if ((s->session->session_id_length > |
| sizeof s->session->session_id) |
| || (0 != |
| OPENSSL_port_memcmp(buf + 1, s->session->session_id, |
| (unsigned int)s->session->session_id_length))) { |
| ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); |
| SSLerr(SSL_F_GET_SERVER_FINISHED, |
| SSL_R_SSL_SESSION_ID_IS_DIFFERENT); |
| return (-1); |
| } |
| } |
| } |
| s->state = SSL_ST_OK; |
| return (1); |
| } |
| |
| /* loads in the certificate from the server */ |
| int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data) |
| { |
| STACK_OF(X509) *sk = NULL; |
| EVP_PKEY *pkey = NULL; |
| SESS_CERT *sc = NULL; |
| int i; |
| X509 *x509 = NULL; |
| int ret = 0; |
| |
| x509 = d2i_X509(NULL, &data, (long)len); |
| if (x509 == NULL) { |
| SSLerr(SSL_F_SSL2_SET_CERTIFICATE, ERR_R_X509_LIB); |
| goto err; |
| } |
| |
| if ((sk = sk_X509_new_null()) == NULL || !sk_X509_push(sk, x509)) { |
| SSLerr(SSL_F_SSL2_SET_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| i = ssl_verify_cert_chain(s, sk); |
| |
| if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)) { |
| SSLerr(SSL_F_SSL2_SET_CERTIFICATE, SSL_R_CERTIFICATE_VERIFY_FAILED); |
| goto err; |
| } |
| ERR_clear_error(); /* but we keep s->verify_result */ |
| s->session->verify_result = s->verify_result; |
| |
| /* server's cert for this session */ |
| sc = ssl_sess_cert_new(); |
| if (sc == NULL) { |
| ret = -1; |
| goto err; |
| } |
| if (s->session->sess_cert) |
| ssl_sess_cert_free(s->session->sess_cert); |
| s->session->sess_cert = sc; |
| |
| sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509 = x509; |
| sc->peer_key = &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]); |
| |
| pkey = X509_get_pubkey(x509); |
| x509 = NULL; |
| if (pkey == NULL) { |
| SSLerr(SSL_F_SSL2_SET_CERTIFICATE, |
| SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY); |
| goto err; |
| } |
| if (pkey->type != EVP_PKEY_RSA) { |
| SSLerr(SSL_F_SSL2_SET_CERTIFICATE, SSL_R_PUBLIC_KEY_NOT_RSA); |
| goto err; |
| } |
| |
| if (!ssl_set_peer_cert_type(sc, SSL2_CT_X509_CERTIFICATE)) |
| goto err; |
| ret = 1; |
| err: |
| sk_X509_free(sk); |
| X509_free(x509); |
| EVP_PKEY_free(pkey); |
| return (ret); |
| } |
| |
| static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, |
| unsigned char *to, int padding) |
| { |
| EVP_PKEY *pkey = NULL; |
| int i = -1; |
| |
| if ((sc == NULL) || (sc->peer_key->x509 == NULL) || |
| ((pkey = X509_get_pubkey(sc->peer_key->x509)) == NULL)) { |
| SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, SSL_R_NO_PUBLICKEY); |
| return (-1); |
| } |
| if (pkey->type != EVP_PKEY_RSA) { |
| SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, SSL_R_PUBLIC_KEY_IS_NOT_RSA); |
| goto end; |
| } |
| |
| /* we have the public key */ |
| i = RSA_public_encrypt(len, from, to, pkey->pkey.rsa, padding); |
| if (i < 0) |
| SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, ERR_R_RSA_LIB); |
| end: |
| EVP_PKEY_free(pkey); |
| return (i); |
| } |
| #else /* !OPENSSL_NO_SSL2 */ |
| |
| # if PEDANTIC |
| static void *dummy = &dummy; |
| # endif |
| |
| #endif |