diff options
Diffstat (limited to 'freebsd/crypto/openssl/ssl/s2_clnt.c')
| -rw-r--r-- | freebsd/crypto/openssl/ssl/s2_clnt.c | 1096 |
1 files changed, 1096 insertions, 0 deletions
diff --git a/freebsd/crypto/openssl/ssl/s2_clnt.c b/freebsd/crypto/openssl/ssl/s2_clnt.c new file mode 100644 index 00000000..5291742e --- /dev/null +++ b/freebsd/crypto/openssl/ssl/s2_clnt.c @@ -0,0 +1,1096 @@ +#include <machine/rtems-bsd-user-space.h> + +/* 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 <stdio.h> +# 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)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 { +# if 0 + /* very bad */ + 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; + } + 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 */ + 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_bytes(s->s2->challenge, SSL2_CHALLENGE_LENGTH) <= 0) + return -1; + 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_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); + 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; + } + 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; + } + 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; + 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 != + 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 |