diff options
Diffstat (limited to 'deps/openssl/openssl/ssl/s2_srvr.c')
| -rw-r--r-- | deps/openssl/openssl/ssl/s2_srvr.c | 1167 |
1 files changed, 0 insertions, 1167 deletions
diff --git a/deps/openssl/openssl/ssl/s2_srvr.c b/deps/openssl/openssl/ssl/s2_srvr.c deleted file mode 100644 index c30161109c..0000000000 --- a/deps/openssl/openssl/ssl/s2_srvr.c +++ /dev/null @@ -1,1167 +0,0 @@ -/* ssl/s2_srvr.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 "../crypto/constant_time_locl.h" -# include <stdio.h> -# include <openssl/bio.h> -# include <openssl/rand.h> -# include <openssl/objects.h> -# include <openssl/evp.h> - -static const SSL_METHOD *ssl2_get_server_method(int ver); -static int get_client_master_key(SSL *s); -static int get_client_hello(SSL *s); -static int server_hello(SSL *s); -static int get_client_finished(SSL *s); -static int server_verify(SSL *s); -static int server_finish(SSL *s); -static int request_certificate(SSL *s); -static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, - unsigned char *to, int padding); -# define BREAK break - -static const SSL_METHOD *ssl2_get_server_method(int ver) -{ - if (ver == SSL2_VERSION) - return (SSLv2_server_method()); - else - return (NULL); -} - -IMPLEMENT_ssl2_meth_func(SSLv2_server_method, - ssl2_accept, - ssl_undefined_function, ssl2_get_server_method) - -int ssl2_accept(SSL *s) -{ - unsigned long l = (unsigned long)time(NULL); - BUF_MEM *buf = NULL; - int ret = -1; - long num1; - 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); - - if (s->cert == NULL) { - SSLerr(SSL_F_SSL2_ACCEPT, SSL_R_NO_CERTIFICATE_SET); - return (-1); - } - - clear_sys_error(); - for (;;) { - state = s->state; - - switch (s->state) { - case SSL_ST_BEFORE: - case SSL_ST_ACCEPT: - case SSL_ST_BEFORE | SSL_ST_ACCEPT: - case SSL_ST_OK | SSL_ST_ACCEPT: - - s->server = 1; - if (cb != NULL) - cb(s, SSL_CB_HANDSHAKE_START, 1); - - s->version = SSL2_VERSION; - s->type = SSL_ST_ACCEPT; - - if (s->init_buf == NULL) { - if ((buf = BUF_MEM_new()) == NULL) { - ret = -1; - goto end; - } - if (!BUF_MEM_grow - (buf, (int)SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { - BUF_MEM_free(buf); - ret = -1; - goto end; - } - s->init_buf = buf; - } - s->init_num = 0; - s->ctx->stats.sess_accept++; - s->handshake_func = ssl2_accept; - s->state = SSL2_ST_GET_CLIENT_HELLO_A; - BREAK; - - case SSL2_ST_GET_CLIENT_HELLO_A: - case SSL2_ST_GET_CLIENT_HELLO_B: - case SSL2_ST_GET_CLIENT_HELLO_C: - s->shutdown = 0; - ret = get_client_hello(s); - if (ret <= 0) - goto end; - s->init_num = 0; - s->state = SSL2_ST_SEND_SERVER_HELLO_A; - BREAK; - - case SSL2_ST_SEND_SERVER_HELLO_A: - case SSL2_ST_SEND_SERVER_HELLO_B: - ret = server_hello(s); - if (ret <= 0) - goto end; - s->init_num = 0; - if (!s->hit) { - s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_A; - BREAK; - } else { - s->state = SSL2_ST_SERVER_START_ENCRYPTION; - BREAK; - } - case SSL2_ST_GET_CLIENT_MASTER_KEY_A: - case SSL2_ST_GET_CLIENT_MASTER_KEY_B: - ret = get_client_master_key(s); - if (ret <= 0) - goto end; - s->init_num = 0; - s->state = SSL2_ST_SERVER_START_ENCRYPTION; - BREAK; - - case SSL2_ST_SERVER_START_ENCRYPTION: - /* - * Ok we how have sent all the stuff needed to start encrypting, - * the next packet back will be encrypted. - */ - if (!ssl2_enc_init(s, 0)) { - ret = -1; - goto end; - } - s->s2->clear_text = 0; - s->state = SSL2_ST_SEND_SERVER_VERIFY_A; - BREAK; - - case SSL2_ST_SEND_SERVER_VERIFY_A: - case SSL2_ST_SEND_SERVER_VERIFY_B: - ret = server_verify(s); - if (ret <= 0) - goto end; - s->init_num = 0; - if (s->hit) { - /* - * If we are in here, we have been buffering the output, so - * we need to flush it and remove buffering from future - * traffic - */ - s->state = SSL2_ST_SEND_SERVER_VERIFY_C; - BREAK; - } else { - s->state = SSL2_ST_GET_CLIENT_FINISHED_A; - break; - } - - case SSL2_ST_SEND_SERVER_VERIFY_C: - /* get the number of bytes to write */ - num1 = BIO_ctrl(s->wbio, BIO_CTRL_INFO, 0, NULL); - if (num1 > 0) { - s->rwstate = SSL_WRITING; - num1 = BIO_flush(s->wbio); - if (num1 <= 0) { - ret = -1; - goto end; - } - s->rwstate = SSL_NOTHING; - } - - /* flushed and now remove buffering */ - s->wbio = BIO_pop(s->wbio); - - s->state = SSL2_ST_GET_CLIENT_FINISHED_A; - BREAK; - - case SSL2_ST_GET_CLIENT_FINISHED_A: - case SSL2_ST_GET_CLIENT_FINISHED_B: - ret = get_client_finished(s); - if (ret <= 0) - goto end; - s->init_num = 0; - s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_A; - BREAK; - - case SSL2_ST_SEND_REQUEST_CERTIFICATE_A: - case SSL2_ST_SEND_REQUEST_CERTIFICATE_B: - case SSL2_ST_SEND_REQUEST_CERTIFICATE_C: - case SSL2_ST_SEND_REQUEST_CERTIFICATE_D: - /* - * don't do a 'request certificate' if we don't want to, or we - * already have one, and we only want to do it once. - */ - if (!(s->verify_mode & SSL_VERIFY_PEER) || - ((s->session->peer != NULL) && - (s->verify_mode & SSL_VERIFY_CLIENT_ONCE))) { - s->state = SSL2_ST_SEND_SERVER_FINISHED_A; - break; - } else { - ret = request_certificate(s); - if (ret <= 0) - goto end; - s->init_num = 0; - s->state = SSL2_ST_SEND_SERVER_FINISHED_A; - } - BREAK; - - case SSL2_ST_SEND_SERVER_FINISHED_A: - case SSL2_ST_SEND_SERVER_FINISHED_B: - ret = server_finish(s); - if (ret <= 0) - goto end; - s->init_num = 0; - s->state = SSL_ST_OK; - break; - - case SSL_ST_OK: - BUF_MEM_free(s->init_buf); - ssl_free_wbio_buffer(s); - s->init_buf = NULL; - s->init_num = 0; - /* ERR_clear_error(); */ - - ssl_update_cache(s, SSL_SESS_CACHE_SERVER); - - s->ctx->stats.sess_accept_good++; - /* s->server=1; */ - ret = 1; - - if (cb != NULL) - cb(s, SSL_CB_HANDSHAKE_DONE, 1); - - goto end; - /* BREAK; */ - - default: - SSLerr(SSL_F_SSL2_ACCEPT, SSL_R_UNKNOWN_STATE); - ret = -1; - goto end; - /* BREAK; */ - } - - if ((cb != NULL) && (s->state != state)) { - new_state = s->state; - s->state = state; - cb(s, SSL_CB_ACCEPT_LOOP, 1); - s->state = new_state; - } - } - end: - s->in_handshake--; - if (cb != NULL) - cb(s, SSL_CB_ACCEPT_EXIT, ret); - return (ret); -} - -static int get_client_master_key(SSL *s) -{ - int is_export, i, n, keya; - unsigned int num_encrypted_key_bytes, key_length; - unsigned long len; - unsigned char *p; - const SSL_CIPHER *cp; - const EVP_CIPHER *c; - const EVP_MD *md; - unsigned char rand_premaster_secret[SSL_MAX_MASTER_KEY_LENGTH]; - unsigned char decrypt_good; - size_t j; - - p = (unsigned char *)s->init_buf->data; - if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A) { - i = ssl2_read(s, (char *)&(p[s->init_num]), 10 - s->init_num); - - if (i < (10 - s->init_num)) - return (ssl2_part_read(s, SSL_F_GET_CLIENT_MASTER_KEY, i)); - s->init_num = 10; - - if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY) { - if (p[-1] != SSL2_MT_ERROR) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, - SSL_R_READ_WRONG_PACKET_TYPE); - } else - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR); - return (-1); - } - - cp = ssl2_get_cipher_by_char(p); - if (cp == NULL || sk_SSL_CIPHER_find(s->session->ciphers, cp) < 0) { - ssl2_return_error(s, SSL2_PE_NO_CIPHER); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH); - return (-1); - } - s->session->cipher = cp; - - p += 3; - n2s(p, i); - s->s2->tmp.clear = i; - n2s(p, i); - s->s2->tmp.enc = i; - n2s(p, i); - if (i > SSL_MAX_KEY_ARG_LENGTH) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG); - return -1; - } - s->session->key_arg_length = i; - s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_B; - } - - /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */ - p = (unsigned char *)s->init_buf->data; - if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); - return -1; - } - keya = s->session->key_arg_length; - len = - 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + - (unsigned long)keya; - if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_MESSAGE_TOO_LONG); - return -1; - } - n = (int)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_CLIENT_MASTER_KEY, i)); - if (s->msg_callback) { - /* CLIENT-MASTER-KEY */ - s->msg_callback(0, s->version, 0, p, (size_t)len, s, - s->msg_callback_arg); - } - p += 10; - - memcpy(s->session->key_arg, &(p[s->s2->tmp.clear + s->s2->tmp.enc]), - (unsigned int)keya); - - if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_PRIVATEKEY); - return (-1); - } - - is_export = SSL_C_IS_EXPORT(s->session->cipher); - - if (!ssl_cipher_get_evp(s->session, &c, &md, NULL, NULL, NULL)) { - ssl2_return_error(s, SSL2_PE_NO_CIPHER); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, - SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); - return (0); - } - - /* - * The format of the CLIENT-MASTER-KEY message is - * 1 byte message type - * 3 bytes cipher - * 2-byte clear key length (stored in s->s2->tmp.clear) - * 2-byte encrypted key length (stored in s->s2->tmp.enc) - * 2-byte key args length (IV etc) - * clear key - * encrypted key - * key args - * - * If the cipher is an export cipher, then the encrypted key bytes - * are a fixed portion of the total key (5 or 8 bytes). The size of - * this portion is in |num_encrypted_key_bytes|. If the cipher is not an - * export cipher, then the entire key material is encrypted (i.e., clear - * key length must be zero). - */ - key_length = (unsigned int)EVP_CIPHER_key_length(c); - if (key_length > SSL_MAX_MASTER_KEY_LENGTH) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); - return -1; - } - - if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) { - is_export = 1; - num_encrypted_key_bytes = 8; - } else if (is_export) { - num_encrypted_key_bytes = 5; - } else { - num_encrypted_key_bytes = key_length; - } - - if (s->s2->tmp.clear + num_encrypted_key_bytes != key_length) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_LENGTH); - return -1; - } - /* - * The encrypted blob must decrypt to the encrypted portion of the key. - * Decryption can't be expanding, so if we don't have enough encrypted - * bytes to fit the key in the buffer, stop now. - */ - if (s->s2->tmp.enc < num_encrypted_key_bytes) { - ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_LENGTH_TOO_SHORT); - return -1; - } - - /* - * We must not leak whether a decryption failure occurs because of - * Bleichenbacher's attack on PKCS #1 v1.5 RSA padding (see RFC 2246, - * section 7.4.7.1). The code follows that advice of the TLS RFC and - * generates a random premaster secret for the case that the decrypt - * fails. See https://tools.ietf.org/html/rfc5246#section-7.4.7.1 - */ - - if (RAND_bytes(rand_premaster_secret, - (int)num_encrypted_key_bytes) <= 0) - return 0; - - i = ssl_rsa_private_decrypt(s->cert, s->s2->tmp.enc, - &(p[s->s2->tmp.clear]), - &(p[s->s2->tmp.clear]), - (s->s2->ssl2_rollback) ? RSA_SSLV23_PADDING : - RSA_PKCS1_PADDING); - ERR_clear_error(); - /* - * If a bad decrypt, continue with protocol but with a random master - * secret (Bleichenbacher attack) - */ - decrypt_good = constant_time_eq_int_8(i, (int)num_encrypted_key_bytes); - for (j = 0; j < num_encrypted_key_bytes; j++) { - p[s->s2->tmp.clear + j] = - constant_time_select_8(decrypt_good, p[s->s2->tmp.clear + j], - rand_premaster_secret[j]); - } - - s->session->master_key_length = (int)key_length; - memcpy(s->session->master_key, p, key_length); - OPENSSL_cleanse(p, key_length); - - return 1; -} - -static int get_client_hello(SSL *s) -{ - int i, n; - unsigned long len; - unsigned char *p; - STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */ - STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */ - STACK_OF(SSL_CIPHER) *prio, *allow; - int z; - - /* - * This is a bit of a hack to check for the correct packet type the first - * time round. - */ - if (s->state == SSL2_ST_GET_CLIENT_HELLO_A) { - s->first_packet = 1; - s->state = SSL2_ST_GET_CLIENT_HELLO_B; - } - - p = (unsigned char *)s->init_buf->data; - if (s->state == SSL2_ST_GET_CLIENT_HELLO_B) { - i = ssl2_read(s, (char *)&(p[s->init_num]), 9 - s->init_num); - if (i < (9 - s->init_num)) - return (ssl2_part_read(s, SSL_F_GET_CLIENT_HELLO, i)); - s->init_num = 9; - - if (*(p++) != SSL2_MT_CLIENT_HELLO) { - if (p[-1] != SSL2_MT_ERROR) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_READ_WRONG_PACKET_TYPE); - } else - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_PEER_ERROR); - return (-1); - } - n2s(p, i); - if (i < s->version) - s->version = i; - n2s(p, i); - s->s2->tmp.cipher_spec_length = i; - n2s(p, i); - s->s2->tmp.session_id_length = i; - if ((i < 0) || (i > SSL_MAX_SSL_SESSION_ID_LENGTH)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - return -1; - } - n2s(p, i); - s->s2->challenge_length = i; - if ((i < SSL2_MIN_CHALLENGE_LENGTH) || - (i > SSL2_MAX_CHALLENGE_LENGTH)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_INVALID_CHALLENGE_LENGTH); - return (-1); - } - s->state = SSL2_ST_GET_CLIENT_HELLO_C; - } - - /* SSL2_ST_GET_CLIENT_HELLO_C */ - p = (unsigned char *)s->init_buf->data; - len = - 9 + (unsigned long)s->s2->tmp.cipher_spec_length + - (unsigned long)s->s2->challenge_length + - (unsigned long)s->s2->tmp.session_id_length; - if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_MESSAGE_TOO_LONG); - return -1; - } - n = (int)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_CLIENT_HELLO, i)); - if (s->msg_callback) { - /* CLIENT-HELLO */ - s->msg_callback(0, s->version, 0, p, (size_t)len, s, - s->msg_callback_arg); - } - p += 9; - - /* - * get session-id before cipher stuff so we can get out session structure - * if it is cached - */ - /* session-id */ - if ((s->s2->tmp.session_id_length != 0) && - (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_BAD_SSL_SESSION_ID_LENGTH); - return (-1); - } - - if (s->s2->tmp.session_id_length == 0) { - if (!ssl_get_new_session(s, 1)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - return (-1); - } - } else { - i = ssl_get_prev_session(s, &(p[s->s2->tmp.cipher_spec_length]), - s->s2->tmp.session_id_length, NULL); - if (i == 1) { /* previous session */ - s->hit = 1; - } else if (i == -1) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - return (-1); - } else { - if (s->cert == NULL) { - ssl2_return_error(s, SSL2_PE_NO_CERTIFICATE); - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_NO_CERTIFICATE_SET); - return (-1); - } - - if (!ssl_get_new_session(s, 1)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - return (-1); - } - } - } - - if (!s->hit) { - cs = ssl_bytes_to_cipher_list(s, p, s->s2->tmp.cipher_spec_length, - &s->session->ciphers); - if (cs == NULL) - goto mem_err; - - cl = SSL_get_ciphers(s); - - if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { - prio = sk_SSL_CIPHER_dup(cl); - if (prio == NULL) - goto mem_err; - allow = cs; - } else { - prio = cs; - allow = cl; - } - - /* Generate list of SSLv2 ciphers shared between client and server */ - for (z = 0; z < sk_SSL_CIPHER_num(prio); z++) { - const SSL_CIPHER *cp = sk_SSL_CIPHER_value(prio, z); - if ((cp->algorithm_ssl & SSL_SSLV2) == 0 || - sk_SSL_CIPHER_find(allow, cp) < 0) { - (void)sk_SSL_CIPHER_delete(prio, z); - z--; - } - } - if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { - sk_SSL_CIPHER_free(s->session->ciphers); - s->session->ciphers = prio; - } - - /* Make sure we have at least one cipher in common */ - if (sk_SSL_CIPHER_num(s->session->ciphers) == 0) { - ssl2_return_error(s, SSL2_PE_NO_CIPHER); - SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_NO_CIPHER_MATCH); - return -1; - } - /* - * s->session->ciphers should now have a list of ciphers that are on - * both the client and server. This list is ordered by the order the - * client sent the ciphers or in the order of the server's preference - * if SSL_OP_CIPHER_SERVER_PREFERENCE was set. - */ - } - p += s->s2->tmp.cipher_spec_length; - /* done cipher selection */ - - /* session id extracted already */ - p += s->s2->tmp.session_id_length; - - /* challenge */ - if (s->s2->challenge_length > sizeof(s->s2->challenge)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - return -1; - } - memcpy(s->s2->challenge, p, (unsigned int)s->s2->challenge_length); - return (1); - mem_err: - SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_MALLOC_FAILURE); - return (0); -} - -static int server_hello(SSL *s) -{ - unsigned char *p, *d; - int n, hit; - - p = (unsigned char *)s->init_buf->data; - if (s->state == SSL2_ST_SEND_SERVER_HELLO_A) { - d = p + 11; - *(p++) = SSL2_MT_SERVER_HELLO; /* type */ - hit = s->hit; - *(p++) = (unsigned char)hit; -# if 1 - if (!hit) { - if (s->session->sess_cert != NULL) - /* - * This can't really happen because get_client_hello has - * called ssl_get_new_session, which does not set sess_cert. - */ - ssl_sess_cert_free(s->session->sess_cert); - s->session->sess_cert = ssl_sess_cert_new(); - if (s->session->sess_cert == NULL) { - SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE); - return (-1); - } - } - /* - * If 'hit' is set, then s->sess_cert may be non-NULL or NULL, - * depending on whether it survived in the internal cache or was - * retrieved from an external cache. If it is NULL, we cannot put any - * useful data in it anyway, so we don't touch it. - */ - -# else /* That's what used to be done when cert_st - * and sess_cert_st were * the same. */ - if (!hit) { /* else add cert to session */ - CRYPTO_add(&s->cert->references, 1, CRYPTO_LOCK_SSL_CERT); - if (s->session->sess_cert != NULL) - ssl_cert_free(s->session->sess_cert); - s->session->sess_cert = s->cert; - } else { /* We have a session id-cache hit, if the * - * session-id has no certificate listed - * against * the 'cert' structure, grab the - * 'old' one * listed against the SSL - * connection */ - if (s->session->sess_cert == NULL) { - CRYPTO_add(&s->cert->references, 1, CRYPTO_LOCK_SSL_CERT); - s->session->sess_cert = s->cert; - } - } -# endif - - if (s->cert == NULL) { - ssl2_return_error(s, SSL2_PE_NO_CERTIFICATE); - SSLerr(SSL_F_SERVER_HELLO, SSL_R_NO_CERTIFICATE_SPECIFIED); - return (-1); - } - - if (hit) { - *(p++) = 0; /* no certificate type */ - s2n(s->version, p); /* version */ - s2n(0, p); /* cert len */ - s2n(0, p); /* ciphers len */ - } else { - /* EAY EAY */ - /* put certificate type */ - *(p++) = SSL2_CT_X509_CERTIFICATE; - s2n(s->version, p); /* version */ - n = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, NULL); - s2n(n, p); /* certificate length */ - i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, &d); - n = 0; - - /* - * lets send out the ciphers we like in the prefered order - */ - n = ssl_cipher_list_to_bytes(s, s->session->ciphers, d, 0); - d += n; - s2n(n, p); /* add cipher length */ - } - - /* make and send conn_id */ - s2n(SSL2_CONNECTION_ID_LENGTH, p); /* add conn_id length */ - s->s2->conn_id_length = SSL2_CONNECTION_ID_LENGTH; - if (RAND_bytes(s->s2->conn_id, (int)s->s2->conn_id_length) <= 0) - return -1; - memcpy(d, s->s2->conn_id, SSL2_CONNECTION_ID_LENGTH); - d += SSL2_CONNECTION_ID_LENGTH; - - s->state = SSL2_ST_SEND_SERVER_HELLO_B; - s->init_num = d - (unsigned char *)s->init_buf->data; - s->init_off = 0; - } - /* SSL2_ST_SEND_SERVER_HELLO_B */ - /* - * If we are using TCP/IP, the performance is bad if we do 2 writes - * without a read between them. This occurs when Session-id reuse is - * used, so I will put in a buffering module - */ - if (s->hit) { - if (!ssl_init_wbio_buffer(s, 1)) - return (-1); - } - - return (ssl2_do_write(s)); -} - -static int get_client_finished(SSL *s) -{ - unsigned char *p; - int i, n; - unsigned long len; - - p = (unsigned char *)s->init_buf->data; - if (s->state == SSL2_ST_GET_CLIENT_FINISHED_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_CLIENT_FINISHED, i)); - s->init_num += i; - - if (*p != SSL2_MT_CLIENT_FINISHED) { - if (*p != SSL2_MT_ERROR) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_FINISHED, - SSL_R_READ_WRONG_PACKET_TYPE); - } else { - SSLerr(SSL_F_GET_CLIENT_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_CLIENT_FINISHED_B; - } - - /* SSL2_ST_GET_CLIENT_FINISHED_B */ - if (s->s2->conn_id_length > sizeof(s->s2->conn_id)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); - return -1; - } - len = 1 + (unsigned long)s->s2->conn_id_length; - n = (int)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_CLIENT_FINISHED, i)); - } - if (s->msg_callback) { - /* CLIENT-FINISHED */ - s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); - } - p += 1; - if (memcmp(p, s->s2->conn_id, s->s2->conn_id_length) != 0) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_GET_CLIENT_FINISHED, SSL_R_CONNECTION_ID_IS_DIFFERENT); - return (-1); - } - return (1); -} - -static int server_verify(SSL *s) -{ - unsigned char *p; - - if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A) { - p = (unsigned char *)s->init_buf->data; - *(p++) = SSL2_MT_SERVER_VERIFY; - if (s->s2->challenge_length > sizeof(s->s2->challenge)) { - SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR); - return -1; - } - memcpy(p, s->s2->challenge, (unsigned int)s->s2->challenge_length); - /* p+=s->s2->challenge_length; */ - - s->state = SSL2_ST_SEND_SERVER_VERIFY_B; - s->init_num = s->s2->challenge_length + 1; - s->init_off = 0; - } - return (ssl2_do_write(s)); -} - -static int server_finish(SSL *s) -{ - unsigned char *p; - - if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A) { - p = (unsigned char *)s->init_buf->data; - *(p++) = SSL2_MT_SERVER_FINISHED; - - if (s->session->session_id_length > sizeof(s->session->session_id)) { - SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR); - return -1; - } - memcpy(p, s->session->session_id, - (unsigned int)s->session->session_id_length); - /* p+=s->session->session_id_length; */ - - s->state = SSL2_ST_SEND_SERVER_FINISHED_B; - s->init_num = s->session->session_id_length + 1; - s->init_off = 0; - } - - /* SSL2_ST_SEND_SERVER_FINISHED_B */ - return (ssl2_do_write(s)); -} - -/* send the request and check the response */ -static int request_certificate(SSL *s) -{ - const unsigned char *cp; - unsigned char *p, *p2, *buf2; - unsigned char *ccd; - int i, j, ctype, ret = -1; - unsigned long len; - X509 *x509 = NULL; - STACK_OF(X509) *sk = NULL; - - ccd = s->s2->tmp.ccl; - if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A) { - p = (unsigned char *)s->init_buf->data; - *(p++) = SSL2_MT_REQUEST_CERTIFICATE; - *(p++) = SSL2_AT_MD5_WITH_RSA_ENCRYPTION; - if (RAND_bytes(ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0) - return -1; - memcpy(p, ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH); - - s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_B; - s->init_num = SSL2_MIN_CERT_CHALLENGE_LENGTH + 2; - s->init_off = 0; - } - - if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B) { - i = ssl2_do_write(s); - if (i <= 0) { - ret = i; - goto end; - } - - s->init_num = 0; - s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_C; - } - - if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C) { - p = (unsigned char *)s->init_buf->data; - /* try to read 6 octets ... */ - i = ssl2_read(s, (char *)&(p[s->init_num]), 6 - s->init_num); - /* - * ... but don't call ssl2_part_read now if we got at least 3 - * (probably NO-CERTIFICATE-ERROR) - */ - if (i < 3 - s->init_num) { - ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, i); - goto end; - } - s->init_num += i; - - if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR)) { - n2s(p, i); - if (i != SSL2_PE_NO_CERTIFICATE) { - /* - * not the error message we expected -- let ssl2_part_read - * handle it - */ - s->init_num -= 3; - ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, 3); - goto end; - } - - if (s->msg_callback) { - /* ERROR */ - s->msg_callback(0, s->version, 0, p, 3, s, - s->msg_callback_arg); - } - - /* - * this is the one place where we can recover from an SSL 2.0 - * error - */ - - if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) { - ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE); - SSLerr(SSL_F_REQUEST_CERTIFICATE, - SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); - goto end; - } - ret = 1; - goto end; - } - if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6)) { - ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); - SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_SHORT_READ); - goto end; - } - if (s->init_num != 6) { - SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR); - goto end; - } - - /* ok we have a response */ - /* certificate type, there is only one right now. */ - ctype = *(p++); - if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) { - ssl2_return_error(s, SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); - SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_BAD_RESPONSE_ARGUMENT); - goto end; - } - n2s(p, i); - s->s2->tmp.clen = i; - n2s(p, i); - s->s2->tmp.rlen = i; - s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_D; - } - - /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */ - p = (unsigned char *)s->init_buf->data; - len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen; - if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { - SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_MESSAGE_TOO_LONG); - goto end; - } - j = (int)len - s->init_num; - i = ssl2_read(s, (char *)&(p[s->init_num]), j); - if (i < j) { - ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, i); - goto end; - } - if (s->msg_callback) { - /* CLIENT-CERTIFICATE */ - s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); - } - p += 6; - - cp = p; - x509 = (X509 *)d2i_X509(NULL, &cp, (long)s->s2->tmp.clen); - if (x509 == NULL) { - SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_X509_LIB); - goto msg_end; - } - - if (((sk = sk_X509_new_null()) == NULL) || (!sk_X509_push(sk, x509))) { - SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_MALLOC_FAILURE); - goto msg_end; - } - - i = ssl_verify_cert_chain(s, sk); - - if (i > 0) { /* we like the packet, now check the chksum */ - EVP_MD_CTX ctx; - EVP_PKEY *pkey = NULL; - - EVP_MD_CTX_init(&ctx); - if (!EVP_VerifyInit_ex(&ctx, s->ctx->rsa_md5, NULL) - || !EVP_VerifyUpdate(&ctx, s->s2->key_material, - s->s2->key_material_length) - || !EVP_VerifyUpdate(&ctx, ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH)) - goto msg_end; - - i = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, NULL); - buf2 = OPENSSL_malloc((unsigned int)i); - if (buf2 == NULL) { - SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_MALLOC_FAILURE); - goto msg_end; - } - p2 = buf2; - i = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, &p2); - if (!EVP_VerifyUpdate(&ctx, buf2, (unsigned int)i)) { - OPENSSL_free(buf2); - goto msg_end; - } - OPENSSL_free(buf2); - - pkey = X509_get_pubkey(x509); - if (pkey == NULL) - goto end; - i = EVP_VerifyFinal(&ctx, cp, s->s2->tmp.rlen, pkey); - EVP_PKEY_free(pkey); - EVP_MD_CTX_cleanup(&ctx); - - if (i > 0) { - if (s->session->peer != NULL) - X509_free(s->session->peer); - s->session->peer = x509; - CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509); - s->session->verify_result = s->verify_result; - ret = 1; - goto end; - } else { - SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_BAD_CHECKSUM); - goto msg_end; - } - } else { - msg_end: - ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE); - } - end: - sk_X509_free(sk); - X509_free(x509); - return (ret); -} - -static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, - unsigned char *to, int padding) -{ - RSA *rsa; - int i; - - if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)) { - SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, SSL_R_NO_PRIVATEKEY); - return (-1); - } - if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA) { - SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, SSL_R_PUBLIC_KEY_IS_NOT_RSA); - return (-1); - } - rsa = c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa; - - /* we have the public key */ - i = RSA_private_decrypt(len, from, to, rsa, padding); - if (i < 0) - SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, ERR_R_RSA_LIB); - return (i); -} -#else /* !OPENSSL_NO_SSL2 */ - -# if PEDANTIC -static void *dummy = &dummy; -# endif - -#endif |