155714Skris/* ssl/s2_srvr.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8296465Sdelphij * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15296465Sdelphij * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22296465Sdelphij * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37296465Sdelphij * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40296465Sdelphij * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52296465Sdelphij * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5889840Skris/* ==================================================================== 5989840Skris * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. 6089840Skris * 6189840Skris * Redistribution and use in source and binary forms, with or without 6289840Skris * modification, are permitted provided that the following conditions 6389840Skris * are met: 6489840Skris * 6589840Skris * 1. Redistributions of source code must retain the above copyright 66296465Sdelphij * notice, this list of conditions and the following disclaimer. 6789840Skris * 6889840Skris * 2. Redistributions in binary form must reproduce the above copyright 6989840Skris * notice, this list of conditions and the following disclaimer in 7089840Skris * the documentation and/or other materials provided with the 7189840Skris * distribution. 7289840Skris * 7389840Skris * 3. All advertising materials mentioning features or use of this 7489840Skris * software must display the following acknowledgment: 7589840Skris * "This product includes software developed by the OpenSSL Project 7689840Skris * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 7789840Skris * 7889840Skris * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 7989840Skris * endorse or promote products derived from this software without 8089840Skris * prior written permission. For written permission, please contact 8189840Skris * openssl-core@openssl.org. 8289840Skris * 8389840Skris * 5. Products derived from this software may not be called "OpenSSL" 8489840Skris * nor may "OpenSSL" appear in their names without prior written 8589840Skris * permission of the OpenSSL Project. 8689840Skris * 8789840Skris * 6. Redistributions of any form whatsoever must retain the following 8889840Skris * acknowledgment: 8989840Skris * "This product includes software developed by the OpenSSL Project 9089840Skris * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 9189840Skris * 9289840Skris * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 9389840Skris * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 9489840Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 9589840Skris * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 9689840Skris * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 9789840Skris * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 9889840Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 9989840Skris * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 10089840Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 10189840Skris * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 10289840Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 10389840Skris * OF THE POSSIBILITY OF SUCH DAMAGE. 10489840Skris * ==================================================================== 10589840Skris * 10689840Skris * This product includes cryptographic software written by Eric Young 10789840Skris * (eay@cryptsoft.com). This product includes software written by Tim 10889840Skris * Hudson (tjh@cryptsoft.com). 10989840Skris * 11089840Skris */ 11155714Skris 11259194Skris#include "ssl_locl.h" 113110007Smarkm#ifndef OPENSSL_NO_SSL2 114296465Sdelphij# include <stdio.h> 115296465Sdelphij# include <openssl/bio.h> 116296465Sdelphij# include <openssl/rand.h> 117296465Sdelphij# include <openssl/objects.h> 118296465Sdelphij# include <openssl/evp.h> 11955714Skris 12055714Skrisstatic SSL_METHOD *ssl2_get_server_method(int ver); 12155714Skrisstatic int get_client_master_key(SSL *s); 12255714Skrisstatic int get_client_hello(SSL *s); 123296465Sdelphijstatic int server_hello(SSL *s); 12455714Skrisstatic int get_client_finished(SSL *s); 12555714Skrisstatic int server_verify(SSL *s); 12655714Skrisstatic int server_finish(SSL *s); 12755714Skrisstatic int request_certificate(SSL *s); 12855714Skrisstatic int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, 129296465Sdelphij unsigned char *to, int padding); 130296465Sdelphij# define BREAK break 13155714Skris 13255714Skrisstatic SSL_METHOD *ssl2_get_server_method(int ver) 133296465Sdelphij{ 134296465Sdelphij if (ver == SSL2_VERSION) 135296465Sdelphij return (SSLv2_server_method()); 136296465Sdelphij else 137296465Sdelphij return (NULL); 138296465Sdelphij} 13955714Skris 140160817SsimonIMPLEMENT_ssl2_meth_func(SSLv2_server_method, 141296465Sdelphij ssl2_accept, 142296465Sdelphij ssl_undefined_function, ssl2_get_server_method) 14355714Skris 14455714Skrisint ssl2_accept(SSL *s) 145296465Sdelphij{ 146296465Sdelphij unsigned long l = (unsigned long)time(NULL); 147296465Sdelphij BUF_MEM *buf = NULL; 148296465Sdelphij int ret = -1; 149296465Sdelphij long num1; 150296465Sdelphij void (*cb) (const SSL *ssl, int type, int val) = NULL; 151296465Sdelphij int new_state, state; 15255714Skris 153296465Sdelphij RAND_add(&l, sizeof(l), 0); 154296465Sdelphij ERR_clear_error(); 155296465Sdelphij clear_sys_error(); 15655714Skris 157296465Sdelphij if (s->info_callback != NULL) 158296465Sdelphij cb = s->info_callback; 159296465Sdelphij else if (s->ctx->info_callback != NULL) 160296465Sdelphij cb = s->ctx->info_callback; 16155714Skris 162296465Sdelphij /* init things to blank */ 163296465Sdelphij s->in_handshake++; 164296465Sdelphij if (!SSL_in_init(s) || SSL_in_before(s)) 165296465Sdelphij SSL_clear(s); 16655714Skris 167296465Sdelphij if (s->cert == NULL) { 168296465Sdelphij SSLerr(SSL_F_SSL2_ACCEPT, SSL_R_NO_CERTIFICATE_SET); 169296465Sdelphij return (-1); 170296465Sdelphij } 17155714Skris 172296465Sdelphij clear_sys_error(); 173296465Sdelphij for (;;) { 174296465Sdelphij state = s->state; 17555714Skris 176296465Sdelphij switch (s->state) { 177296465Sdelphij case SSL_ST_BEFORE: 178296465Sdelphij case SSL_ST_ACCEPT: 179296465Sdelphij case SSL_ST_BEFORE | SSL_ST_ACCEPT: 180296465Sdelphij case SSL_ST_OK | SSL_ST_ACCEPT: 18155714Skris 182296465Sdelphij s->server = 1; 183296465Sdelphij if (cb != NULL) 184296465Sdelphij cb(s, SSL_CB_HANDSHAKE_START, 1); 18555714Skris 186296465Sdelphij s->version = SSL2_VERSION; 187296465Sdelphij s->type = SSL_ST_ACCEPT; 18855714Skris 189296465Sdelphij buf = s->init_buf; 190296465Sdelphij if ((buf == NULL) && ((buf = BUF_MEM_new()) == NULL)) { 191296465Sdelphij ret = -1; 192296465Sdelphij goto end; 193296465Sdelphij } 194296465Sdelphij if (!BUF_MEM_grow(buf, (int) 195296465Sdelphij SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { 196296465Sdelphij ret = -1; 197296465Sdelphij goto end; 198296465Sdelphij } 199296465Sdelphij s->init_buf = buf; 200296465Sdelphij s->init_num = 0; 201296465Sdelphij s->ctx->stats.sess_accept++; 202296465Sdelphij s->handshake_func = ssl2_accept; 203296465Sdelphij s->state = SSL2_ST_GET_CLIENT_HELLO_A; 204296465Sdelphij BREAK; 20555714Skris 206296465Sdelphij case SSL2_ST_GET_CLIENT_HELLO_A: 207296465Sdelphij case SSL2_ST_GET_CLIENT_HELLO_B: 208296465Sdelphij case SSL2_ST_GET_CLIENT_HELLO_C: 209296465Sdelphij s->shutdown = 0; 210296465Sdelphij ret = get_client_hello(s); 211296465Sdelphij if (ret <= 0) 212296465Sdelphij goto end; 213296465Sdelphij s->init_num = 0; 214296465Sdelphij s->state = SSL2_ST_SEND_SERVER_HELLO_A; 215296465Sdelphij BREAK; 21655714Skris 217296465Sdelphij case SSL2_ST_SEND_SERVER_HELLO_A: 218296465Sdelphij case SSL2_ST_SEND_SERVER_HELLO_B: 219296465Sdelphij ret = server_hello(s); 220296465Sdelphij if (ret <= 0) 221296465Sdelphij goto end; 222296465Sdelphij s->init_num = 0; 223296465Sdelphij if (!s->hit) { 224296465Sdelphij s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_A; 225296465Sdelphij BREAK; 226296465Sdelphij } else { 227296465Sdelphij s->state = SSL2_ST_SERVER_START_ENCRYPTION; 228296465Sdelphij BREAK; 229296465Sdelphij } 230296465Sdelphij case SSL2_ST_GET_CLIENT_MASTER_KEY_A: 231296465Sdelphij case SSL2_ST_GET_CLIENT_MASTER_KEY_B: 232296465Sdelphij ret = get_client_master_key(s); 233296465Sdelphij if (ret <= 0) 234296465Sdelphij goto end; 235296465Sdelphij s->init_num = 0; 236296465Sdelphij s->state = SSL2_ST_SERVER_START_ENCRYPTION; 237296465Sdelphij BREAK; 23855714Skris 239296465Sdelphij case SSL2_ST_SERVER_START_ENCRYPTION: 240296465Sdelphij /* 241296465Sdelphij * Ok we how have sent all the stuff needed to start encrypting, 242296465Sdelphij * the next packet back will be encrypted. 243296465Sdelphij */ 244296465Sdelphij if (!ssl2_enc_init(s, 0)) { 245296465Sdelphij ret = -1; 246296465Sdelphij goto end; 247296465Sdelphij } 248296465Sdelphij s->s2->clear_text = 0; 249296465Sdelphij s->state = SSL2_ST_SEND_SERVER_VERIFY_A; 250296465Sdelphij BREAK; 25155714Skris 252296465Sdelphij case SSL2_ST_SEND_SERVER_VERIFY_A: 253296465Sdelphij case SSL2_ST_SEND_SERVER_VERIFY_B: 254296465Sdelphij ret = server_verify(s); 255296465Sdelphij if (ret <= 0) 256296465Sdelphij goto end; 257296465Sdelphij s->init_num = 0; 258296465Sdelphij if (s->hit) { 259296465Sdelphij /* 260296465Sdelphij * If we are in here, we have been buffering the output, so 261296465Sdelphij * we need to flush it and remove buffering from future 262296465Sdelphij * traffic 263296465Sdelphij */ 264296465Sdelphij s->state = SSL2_ST_SEND_SERVER_VERIFY_C; 265296465Sdelphij BREAK; 266296465Sdelphij } else { 267296465Sdelphij s->state = SSL2_ST_GET_CLIENT_FINISHED_A; 268296465Sdelphij break; 269296465Sdelphij } 27055714Skris 271296465Sdelphij case SSL2_ST_SEND_SERVER_VERIFY_C: 272296465Sdelphij /* get the number of bytes to write */ 273296465Sdelphij num1 = BIO_ctrl(s->wbio, BIO_CTRL_INFO, 0, NULL); 274296465Sdelphij if (num1 > 0) { 275296465Sdelphij s->rwstate = SSL_WRITING; 276296465Sdelphij num1 = BIO_flush(s->wbio); 277296465Sdelphij if (num1 <= 0) { 278296465Sdelphij ret = -1; 279296465Sdelphij goto end; 280296465Sdelphij } 281296465Sdelphij s->rwstate = SSL_NOTHING; 282296465Sdelphij } 28355714Skris 284296465Sdelphij /* flushed and now remove buffering */ 285296465Sdelphij s->wbio = BIO_pop(s->wbio); 28655714Skris 287296465Sdelphij s->state = SSL2_ST_GET_CLIENT_FINISHED_A; 288296465Sdelphij BREAK; 28955714Skris 290296465Sdelphij case SSL2_ST_GET_CLIENT_FINISHED_A: 291296465Sdelphij case SSL2_ST_GET_CLIENT_FINISHED_B: 292296465Sdelphij ret = get_client_finished(s); 293296465Sdelphij if (ret <= 0) 294296465Sdelphij goto end; 295296465Sdelphij s->init_num = 0; 296296465Sdelphij s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_A; 297296465Sdelphij BREAK; 29855714Skris 299296465Sdelphij case SSL2_ST_SEND_REQUEST_CERTIFICATE_A: 300296465Sdelphij case SSL2_ST_SEND_REQUEST_CERTIFICATE_B: 301296465Sdelphij case SSL2_ST_SEND_REQUEST_CERTIFICATE_C: 302296465Sdelphij case SSL2_ST_SEND_REQUEST_CERTIFICATE_D: 303296465Sdelphij /* 304296465Sdelphij * don't do a 'request certificate' if we don't want to, or we 305296465Sdelphij * already have one, and we only want to do it once. 306296465Sdelphij */ 307296465Sdelphij if (!(s->verify_mode & SSL_VERIFY_PEER) || 308296465Sdelphij ((s->session->peer != NULL) && 309296465Sdelphij (s->verify_mode & SSL_VERIFY_CLIENT_ONCE))) { 310296465Sdelphij s->state = SSL2_ST_SEND_SERVER_FINISHED_A; 311296465Sdelphij break; 312296465Sdelphij } else { 313296465Sdelphij ret = request_certificate(s); 314296465Sdelphij if (ret <= 0) 315296465Sdelphij goto end; 316296465Sdelphij s->init_num = 0; 317296465Sdelphij s->state = SSL2_ST_SEND_SERVER_FINISHED_A; 318296465Sdelphij } 319296465Sdelphij BREAK; 32055714Skris 321296465Sdelphij case SSL2_ST_SEND_SERVER_FINISHED_A: 322296465Sdelphij case SSL2_ST_SEND_SERVER_FINISHED_B: 323296465Sdelphij ret = server_finish(s); 324296465Sdelphij if (ret <= 0) 325296465Sdelphij goto end; 326296465Sdelphij s->init_num = 0; 327296465Sdelphij s->state = SSL_ST_OK; 328296465Sdelphij break; 32955714Skris 330296465Sdelphij case SSL_ST_OK: 331296465Sdelphij BUF_MEM_free(s->init_buf); 332296465Sdelphij ssl_free_wbio_buffer(s); 333296465Sdelphij s->init_buf = NULL; 334296465Sdelphij s->init_num = 0; 335296465Sdelphij /* ERR_clear_error(); */ 33655714Skris 337296465Sdelphij ssl_update_cache(s, SSL_SESS_CACHE_SERVER); 33855714Skris 339296465Sdelphij s->ctx->stats.sess_accept_good++; 340296465Sdelphij /* s->server=1; */ 341296465Sdelphij ret = 1; 34255714Skris 343296465Sdelphij if (cb != NULL) 344296465Sdelphij cb(s, SSL_CB_HANDSHAKE_DONE, 1); 34555714Skris 346296465Sdelphij goto end; 347296465Sdelphij /* BREAK; */ 34855714Skris 349296465Sdelphij default: 350296465Sdelphij SSLerr(SSL_F_SSL2_ACCEPT, SSL_R_UNKNOWN_STATE); 351296465Sdelphij ret = -1; 352296465Sdelphij goto end; 353296465Sdelphij /* BREAK; */ 354296465Sdelphij } 35555714Skris 356296465Sdelphij if ((cb != NULL) && (s->state != state)) { 357296465Sdelphij new_state = s->state; 358296465Sdelphij s->state = state; 359296465Sdelphij cb(s, SSL_CB_ACCEPT_LOOP, 1); 360296465Sdelphij s->state = new_state; 361296465Sdelphij } 362296465Sdelphij } 363296465Sdelphij end: 364296465Sdelphij s->in_handshake--; 365296465Sdelphij if (cb != NULL) 366296465Sdelphij cb(s, SSL_CB_ACCEPT_EXIT, ret); 367296465Sdelphij return (ret); 368296465Sdelphij} 369296465Sdelphij 37055714Skrisstatic int get_client_master_key(SSL *s) 371296465Sdelphij{ 372296465Sdelphij int is_export, i, n, keya; 373296465Sdelphij unsigned int ek; 374296465Sdelphij unsigned long len; 375296465Sdelphij unsigned char *p; 376296465Sdelphij SSL_CIPHER *cp; 377296465Sdelphij const EVP_CIPHER *c; 378296465Sdelphij const EVP_MD *md; 37955714Skris 380296465Sdelphij p = (unsigned char *)s->init_buf->data; 381296465Sdelphij if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A) { 382296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), 10 - s->init_num); 38355714Skris 384296465Sdelphij if (i < (10 - s->init_num)) 385296465Sdelphij return (ssl2_part_read(s, SSL_F_GET_CLIENT_MASTER_KEY, i)); 386296465Sdelphij s->init_num = 10; 38789840Skris 388296465Sdelphij if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY) { 389296465Sdelphij if (p[-1] != SSL2_MT_ERROR) { 390296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 391296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, 392296465Sdelphij SSL_R_READ_WRONG_PACKET_TYPE); 393296465Sdelphij } else 394296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR); 395296465Sdelphij return (-1); 396296465Sdelphij } 39755714Skris 398296465Sdelphij cp = ssl2_get_cipher_by_char(p); 399296465Sdelphij if (cp == NULL || sk_SSL_CIPHER_find(s->session->ciphers, cp) < 0) { 400296465Sdelphij ssl2_return_error(s, SSL2_PE_NO_CIPHER); 401296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH); 402296465Sdelphij return (-1); 403296465Sdelphij } 404296465Sdelphij s->session->cipher = cp; 40555714Skris 406296465Sdelphij p += 3; 407296465Sdelphij n2s(p, i); 408296465Sdelphij s->s2->tmp.clear = i; 409296465Sdelphij n2s(p, i); 410296465Sdelphij s->s2->tmp.enc = i; 411296465Sdelphij n2s(p, i); 412296465Sdelphij if (i > SSL_MAX_KEY_ARG_LENGTH) { 413296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 414296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG); 415296465Sdelphij return -1; 416296465Sdelphij } 417296465Sdelphij s->session->key_arg_length = i; 418296465Sdelphij s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_B; 419296465Sdelphij } 42055714Skris 421296465Sdelphij /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */ 422296465Sdelphij p = (unsigned char *)s->init_buf->data; 423296465Sdelphij if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 424296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 425296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 426296465Sdelphij return -1; 427296465Sdelphij } 428296465Sdelphij keya = s->session->key_arg_length; 429296465Sdelphij len = 430296465Sdelphij 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + 431296465Sdelphij (unsigned long)keya; 432296465Sdelphij if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 433296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 434296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_MESSAGE_TOO_LONG); 435296465Sdelphij return -1; 436296465Sdelphij } 437296465Sdelphij n = (int)len - s->init_num; 438296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), n); 439296465Sdelphij if (i != n) 440296465Sdelphij return (ssl2_part_read(s, SSL_F_GET_CLIENT_MASTER_KEY, i)); 441296465Sdelphij if (s->msg_callback) { 442296465Sdelphij /* CLIENT-MASTER-KEY */ 443296465Sdelphij s->msg_callback(0, s->version, 0, p, (size_t)len, s, 444296465Sdelphij s->msg_callback_arg); 445296465Sdelphij } 446296465Sdelphij p += 10; 44755714Skris 448296465Sdelphij memcpy(s->session->key_arg, &(p[s->s2->tmp.clear + s->s2->tmp.enc]), 449296465Sdelphij (unsigned int)keya); 45055714Skris 451296465Sdelphij if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) { 452296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 453296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_PRIVATEKEY); 454296465Sdelphij return (-1); 455296465Sdelphij } 45655714Skris 457296465Sdelphij is_export = SSL_C_IS_EXPORT(s->session->cipher); 45855714Skris 459296465Sdelphij if (!ssl_cipher_get_evp(s->session, &c, &md, NULL)) { 460296465Sdelphij ssl2_return_error(s, SSL2_PE_NO_CIPHER); 461296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, 462296465Sdelphij SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); 463296465Sdelphij return (0); 464296465Sdelphij } 46555714Skris 466296465Sdelphij if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) { 467296465Sdelphij is_export = 1; 468296465Sdelphij ek = 8; 469296465Sdelphij } else 470296465Sdelphij ek = 5; 471280268Sdelphij 472296465Sdelphij /* 473296465Sdelphij * The format of the CLIENT-MASTER-KEY message is 474296465Sdelphij * 1 byte message type 475296465Sdelphij * 3 bytes cipher 476296465Sdelphij * 2-byte clear key length (stored in s->s2->tmp.clear) 477296465Sdelphij * 2-byte encrypted key length (stored in s->s2->tmp.enc) 478296465Sdelphij * 2-byte key args length (IV etc) 479296465Sdelphij * clear key 480296465Sdelphij * encrypted key 481296465Sdelphij * key args 482296465Sdelphij * 483296465Sdelphij * If the cipher is an export cipher, then the encrypted key bytes 484296465Sdelphij * are a fixed portion of the total key (5 or 8 bytes). The size of 485296465Sdelphij * this portion is in |ek|. If the cipher is not an export cipher, 486296465Sdelphij * then the entire key material is encrypted (i.e., clear key length 487296465Sdelphij * must be zero). 488296465Sdelphij */ 489296465Sdelphij if ((!is_export && s->s2->tmp.clear != 0) || 490296465Sdelphij (is_export && s->s2->tmp.clear + ek != (unsigned int)EVP_CIPHER_key_length(c))) { 491296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 492296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_LENGTH); 493296465Sdelphij return -1; 494296465Sdelphij } 495296465Sdelphij /* 496296465Sdelphij * The encrypted blob must decrypt to the encrypted portion of the key. 497296465Sdelphij * Decryption can't be expanding, so if we don't have enough encrypted 498296465Sdelphij * bytes to fit the key in the buffer, stop now. 499296465Sdelphij */ 500296465Sdelphij if ((is_export && s->s2->tmp.enc < ek) || 501296465Sdelphij (!is_export && s->s2->tmp.enc < (unsigned int)EVP_CIPHER_key_length(c))) { 502296465Sdelphij ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 503296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_LENGTH_TOO_SHORT); 504296465Sdelphij return -1; 505296465Sdelphij } 506296465Sdelphij 507296465Sdelphij i = ssl_rsa_private_decrypt(s->cert, s->s2->tmp.enc, 508280268Sdelphij &(p[s->s2->tmp.clear]), 509280268Sdelphij &(p[s->s2->tmp.clear]), 510280268Sdelphij (s->s2->ssl2_rollback) ? RSA_SSLV23_PADDING : 511280268Sdelphij RSA_PKCS1_PADDING); 512280268Sdelphij 513296465Sdelphij /* bad decrypt */ 514296465Sdelphij# if 1 515296465Sdelphij /* 516296465Sdelphij * If a bad decrypt, continue with protocol but with a random master 517296465Sdelphij * secret (Bleichenbacher attack) 518296465Sdelphij */ 519296465Sdelphij if ((i < 0) || ((!is_export && i != EVP_CIPHER_key_length(c)) 520296465Sdelphij || (is_export && i != (int)ek))) { 521296465Sdelphij ERR_clear_error(); 522296465Sdelphij if (is_export) 523296465Sdelphij i = ek; 524296465Sdelphij else 525296465Sdelphij i = EVP_CIPHER_key_length(c); 526296465Sdelphij if (RAND_pseudo_bytes(&p[s->s2->tmp.clear], i) <= 0) 527296465Sdelphij return 0; 528296465Sdelphij } 529296465Sdelphij# else 530296465Sdelphij if (i < 0) { 531296465Sdelphij error = 1; 532296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_BAD_RSA_DECRYPT); 533296465Sdelphij } 534296465Sdelphij /* incorrect number of key bytes for non export cipher */ 535296465Sdelphij else if ((!is_export && (i != EVP_CIPHER_key_length(c))) 536296465Sdelphij || (is_export && ((i != ek) || (s->s2->tmp.clear + i != 537296465Sdelphij EVP_CIPHER_key_length(c))))) { 538296465Sdelphij error = 1; 539296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_WRONG_NUMBER_OF_KEY_BITS); 540296465Sdelphij } 541296465Sdelphij if (error) { 542296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 543296465Sdelphij return (-1); 544296465Sdelphij } 545296465Sdelphij# endif 54655714Skris 547296465Sdelphij if (is_export) 548296465Sdelphij i = EVP_CIPHER_key_length(c); 549101621Snectar 550296465Sdelphij if (i > SSL_MAX_MASTER_KEY_LENGTH) { 551296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 552296465Sdelphij SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 553296465Sdelphij return -1; 554296465Sdelphij } 555296465Sdelphij s->session->master_key_length = i; 556296465Sdelphij memcpy(s->session->master_key, p, (unsigned int)i); 557296465Sdelphij return (1); 558296465Sdelphij} 55955714Skris 56055714Skrisstatic int get_client_hello(SSL *s) 561296465Sdelphij{ 562296465Sdelphij int i, n; 563296465Sdelphij unsigned long len; 564296465Sdelphij unsigned char *p; 565296465Sdelphij STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */ 566296465Sdelphij STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */ 567296465Sdelphij STACK_OF(SSL_CIPHER) *prio, *allow; 568296465Sdelphij int z; 56955714Skris 570296465Sdelphij /* 571296465Sdelphij * This is a bit of a hack to check for the correct packet type the first 572296465Sdelphij * time round. 573296465Sdelphij */ 574296465Sdelphij if (s->state == SSL2_ST_GET_CLIENT_HELLO_A) { 575296465Sdelphij s->first_packet = 1; 576296465Sdelphij s->state = SSL2_ST_GET_CLIENT_HELLO_B; 577296465Sdelphij } 57855714Skris 579296465Sdelphij p = (unsigned char *)s->init_buf->data; 580296465Sdelphij if (s->state == SSL2_ST_GET_CLIENT_HELLO_B) { 581296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), 9 - s->init_num); 582296465Sdelphij if (i < (9 - s->init_num)) 583296465Sdelphij return (ssl2_part_read(s, SSL_F_GET_CLIENT_HELLO, i)); 584296465Sdelphij s->init_num = 9; 58555714Skris 586296465Sdelphij if (*(p++) != SSL2_MT_CLIENT_HELLO) { 587296465Sdelphij if (p[-1] != SSL2_MT_ERROR) { 588296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 589296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_READ_WRONG_PACKET_TYPE); 590296465Sdelphij } else 591296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_PEER_ERROR); 592296465Sdelphij return (-1); 593296465Sdelphij } 594296465Sdelphij n2s(p, i); 595296465Sdelphij if (i < s->version) 596296465Sdelphij s->version = i; 597296465Sdelphij n2s(p, i); 598296465Sdelphij s->s2->tmp.cipher_spec_length = i; 599296465Sdelphij n2s(p, i); 600296465Sdelphij s->s2->tmp.session_id_length = i; 601296465Sdelphij n2s(p, i); 602296465Sdelphij s->s2->challenge_length = i; 603296465Sdelphij if ((i < SSL2_MIN_CHALLENGE_LENGTH) || 604296465Sdelphij (i > SSL2_MAX_CHALLENGE_LENGTH)) { 605296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 606296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_INVALID_CHALLENGE_LENGTH); 607296465Sdelphij return (-1); 608296465Sdelphij } 609296465Sdelphij s->state = SSL2_ST_GET_CLIENT_HELLO_C; 610296465Sdelphij } 61155714Skris 612296465Sdelphij /* SSL2_ST_GET_CLIENT_HELLO_C */ 613296465Sdelphij p = (unsigned char *)s->init_buf->data; 614296465Sdelphij len = 615296465Sdelphij 9 + (unsigned long)s->s2->tmp.cipher_spec_length + 616296465Sdelphij (unsigned long)s->s2->challenge_length + 617296465Sdelphij (unsigned long)s->s2->tmp.session_id_length; 618296465Sdelphij if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 619296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 620296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_MESSAGE_TOO_LONG); 621296465Sdelphij return -1; 622296465Sdelphij } 623296465Sdelphij n = (int)len - s->init_num; 624296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), n); 625296465Sdelphij if (i != n) 626296465Sdelphij return (ssl2_part_read(s, SSL_F_GET_CLIENT_HELLO, i)); 627296465Sdelphij if (s->msg_callback) { 628296465Sdelphij /* CLIENT-HELLO */ 629296465Sdelphij s->msg_callback(0, s->version, 0, p, (size_t)len, s, 630296465Sdelphij s->msg_callback_arg); 631296465Sdelphij } 632296465Sdelphij p += 9; 63355714Skris 634296465Sdelphij /* 635296465Sdelphij * get session-id before cipher stuff so we can get out session structure 636296465Sdelphij * if it is cached 637296465Sdelphij */ 638296465Sdelphij /* session-id */ 639296465Sdelphij if ((s->s2->tmp.session_id_length != 0) && 640296465Sdelphij (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH)) { 641296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 642296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_BAD_SSL_SESSION_ID_LENGTH); 643296465Sdelphij return (-1); 644296465Sdelphij } 64555714Skris 646296465Sdelphij if (s->s2->tmp.session_id_length == 0) { 647296465Sdelphij if (!ssl_get_new_session(s, 1)) { 648296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 649296465Sdelphij return (-1); 650296465Sdelphij } 651296465Sdelphij } else { 652296465Sdelphij i = ssl_get_prev_session(s, &(p[s->s2->tmp.cipher_spec_length]), 653296465Sdelphij s->s2->tmp.session_id_length, NULL); 654296465Sdelphij if (i == 1) { /* previous session */ 655296465Sdelphij s->hit = 1; 656296465Sdelphij } else if (i == -1) { 657296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 658296465Sdelphij return (-1); 659296465Sdelphij } else { 660296465Sdelphij if (s->cert == NULL) { 661296465Sdelphij ssl2_return_error(s, SSL2_PE_NO_CERTIFICATE); 662296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_NO_CERTIFICATE_SET); 663296465Sdelphij return (-1); 664296465Sdelphij } 66555714Skris 666296465Sdelphij if (!ssl_get_new_session(s, 1)) { 667296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 668296465Sdelphij return (-1); 669296465Sdelphij } 670296465Sdelphij } 671296465Sdelphij } 67255714Skris 673296465Sdelphij if (!s->hit) { 674296465Sdelphij cs = ssl_bytes_to_cipher_list(s, p, s->s2->tmp.cipher_spec_length, 675296465Sdelphij &s->session->ciphers); 676296465Sdelphij if (cs == NULL) 677296465Sdelphij goto mem_err; 67855714Skris 679296465Sdelphij cl = SSL_get_ciphers(s); 680295061Sdelphij 681296465Sdelphij if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { 682296465Sdelphij prio = sk_SSL_CIPHER_dup(cl); 683296465Sdelphij if (prio == NULL) 684296465Sdelphij goto mem_err; 685296465Sdelphij allow = cs; 686296465Sdelphij } else { 687296465Sdelphij prio = cs; 688296465Sdelphij allow = cl; 689296465Sdelphij } 69055714Skris 691296465Sdelphij /* Generate list of SSLv2 ciphers shared between client and server */ 692296465Sdelphij for (z = 0; z < sk_SSL_CIPHER_num(prio); z++) { 693296465Sdelphij const SSL_CIPHER *cp = sk_SSL_CIPHER_value(prio, z); 694296465Sdelphij if ((cp->algorithms & SSL_SSLV2) == 0 || 695296465Sdelphij sk_SSL_CIPHER_find(allow, cp) < 0) { 696296465Sdelphij (void)sk_SSL_CIPHER_delete(prio, z); 697296465Sdelphij z--; 698296465Sdelphij } 699296465Sdelphij } 700296465Sdelphij if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { 701296465Sdelphij sk_SSL_CIPHER_free(s->session->ciphers); 702296465Sdelphij s->session->ciphers = prio; 703296465Sdelphij } 70455714Skris 705296465Sdelphij /* Make sure we have at least one cipher in common */ 706296465Sdelphij if (sk_SSL_CIPHER_num(s->session->ciphers) == 0) { 707296465Sdelphij ssl2_return_error(s, SSL2_PE_NO_CIPHER); 708296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_NO_CIPHER_MATCH); 709296465Sdelphij return -1; 710296465Sdelphij } 711296465Sdelphij /* 712296465Sdelphij * s->session->ciphers should now have a list of ciphers that are on 713296465Sdelphij * both the client and server. This list is ordered by the order the 714296465Sdelphij * client sent the ciphers or in the order of the server's preference 715296465Sdelphij * if SSL_OP_CIPHER_SERVER_PREFERENCE was set. 716296465Sdelphij */ 717296465Sdelphij } 718296465Sdelphij p += s->s2->tmp.cipher_spec_length; 719296465Sdelphij /* done cipher selection */ 72055714Skris 721296465Sdelphij /* session id extracted already */ 722296465Sdelphij p += s->s2->tmp.session_id_length; 723296465Sdelphij 724296465Sdelphij /* challenge */ 725296465Sdelphij if (s->s2->challenge_length > sizeof s->s2->challenge) { 726296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 727296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 728296465Sdelphij return -1; 729296465Sdelphij } 730296465Sdelphij memcpy(s->s2->challenge, p, (unsigned int)s->s2->challenge_length); 731296465Sdelphij return (1); 732296465Sdelphij mem_err: 733296465Sdelphij SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_MALLOC_FAILURE); 734296465Sdelphij return (0); 735296465Sdelphij} 736296465Sdelphij 73755714Skrisstatic int server_hello(SSL *s) 738296465Sdelphij{ 739296465Sdelphij unsigned char *p, *d; 740296465Sdelphij int n, hit; 74155714Skris 742296465Sdelphij p = (unsigned char *)s->init_buf->data; 743296465Sdelphij if (s->state == SSL2_ST_SEND_SERVER_HELLO_A) { 744296465Sdelphij d = p + 11; 745296465Sdelphij *(p++) = SSL2_MT_SERVER_HELLO; /* type */ 746296465Sdelphij hit = s->hit; 747296465Sdelphij *(p++) = (unsigned char)hit; 748296465Sdelphij# if 1 749296465Sdelphij if (!hit) { 750296465Sdelphij if (s->session->sess_cert != NULL) 751296465Sdelphij /* 752296465Sdelphij * This can't really happen because get_client_hello has 753296465Sdelphij * called ssl_get_new_session, which does not set sess_cert. 754296465Sdelphij */ 755296465Sdelphij ssl_sess_cert_free(s->session->sess_cert); 756296465Sdelphij s->session->sess_cert = ssl_sess_cert_new(); 757296465Sdelphij if (s->session->sess_cert == NULL) { 758296465Sdelphij SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE); 759296465Sdelphij return (-1); 760296465Sdelphij } 761296465Sdelphij } 762296465Sdelphij /* 763296465Sdelphij * If 'hit' is set, then s->sess_cert may be non-NULL or NULL, 764296465Sdelphij * depending on whether it survived in the internal cache or was 765296465Sdelphij * retrieved from an external cache. If it is NULL, we cannot put any 766296465Sdelphij * useful data in it anyway, so we don't touch it. 767296465Sdelphij */ 76855714Skris 769296465Sdelphij# else /* That's what used to be done when cert_st 770296465Sdelphij * and sess_cert_st were * the same. */ 771296465Sdelphij if (!hit) { /* else add cert to session */ 772296465Sdelphij CRYPTO_add(&s->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 773296465Sdelphij if (s->session->sess_cert != NULL) 774296465Sdelphij ssl_cert_free(s->session->sess_cert); 775296465Sdelphij s->session->sess_cert = s->cert; 776296465Sdelphij } else { /* We have a session id-cache hit, if the * 777296465Sdelphij * session-id has no certificate listed 778296465Sdelphij * against * the 'cert' structure, grab the 779296465Sdelphij * 'old' one * listed against the SSL 780296465Sdelphij * connection */ 781296465Sdelphij if (s->session->sess_cert == NULL) { 782296465Sdelphij CRYPTO_add(&s->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 783296465Sdelphij s->session->sess_cert = s->cert; 784296465Sdelphij } 785296465Sdelphij } 786296465Sdelphij# endif 78755714Skris 788296465Sdelphij if (s->cert == NULL) { 789296465Sdelphij ssl2_return_error(s, SSL2_PE_NO_CERTIFICATE); 790296465Sdelphij SSLerr(SSL_F_SERVER_HELLO, SSL_R_NO_CERTIFICATE_SPECIFIED); 791296465Sdelphij return (-1); 792296465Sdelphij } 79355714Skris 794296465Sdelphij if (hit) { 795296465Sdelphij *(p++) = 0; /* no certificate type */ 796296465Sdelphij s2n(s->version, p); /* version */ 797296465Sdelphij s2n(0, p); /* cert len */ 798296465Sdelphij s2n(0, p); /* ciphers len */ 799296465Sdelphij } else { 800296465Sdelphij /* EAY EAY */ 801296465Sdelphij /* put certificate type */ 802296465Sdelphij *(p++) = SSL2_CT_X509_CERTIFICATE; 803296465Sdelphij s2n(s->version, p); /* version */ 804296465Sdelphij n = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, NULL); 805296465Sdelphij s2n(n, p); /* certificate length */ 806296465Sdelphij i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, &d); 807296465Sdelphij n = 0; 80855714Skris 809296465Sdelphij /* 810296465Sdelphij * lets send out the ciphers we like in the prefered order 811296465Sdelphij */ 812296465Sdelphij n = ssl_cipher_list_to_bytes(s, s->session->ciphers, d, 0); 813296465Sdelphij d += n; 814296465Sdelphij s2n(n, p); /* add cipher length */ 815296465Sdelphij } 81655714Skris 817296465Sdelphij /* make and send conn_id */ 818296465Sdelphij s2n(SSL2_CONNECTION_ID_LENGTH, p); /* add conn_id length */ 819296465Sdelphij s->s2->conn_id_length = SSL2_CONNECTION_ID_LENGTH; 820296465Sdelphij if (RAND_pseudo_bytes(s->s2->conn_id, (int)s->s2->conn_id_length) <= 821296465Sdelphij 0) 822296465Sdelphij return -1; 823296465Sdelphij memcpy(d, s->s2->conn_id, SSL2_CONNECTION_ID_LENGTH); 824296465Sdelphij d += SSL2_CONNECTION_ID_LENGTH; 82555714Skris 826296465Sdelphij s->state = SSL2_ST_SEND_SERVER_HELLO_B; 827296465Sdelphij s->init_num = d - (unsigned char *)s->init_buf->data; 828296465Sdelphij s->init_off = 0; 829296465Sdelphij } 830296465Sdelphij /* SSL2_ST_SEND_SERVER_HELLO_B */ 831296465Sdelphij /* 832296465Sdelphij * If we are using TCP/IP, the performance is bad if we do 2 writes 833296465Sdelphij * without a read between them. This occurs when Session-id reuse is 834296465Sdelphij * used, so I will put in a buffering module 835296465Sdelphij */ 836296465Sdelphij if (s->hit) { 837296465Sdelphij if (!ssl_init_wbio_buffer(s, 1)) 838296465Sdelphij return (-1); 839296465Sdelphij } 840296465Sdelphij 841296465Sdelphij return (ssl2_do_write(s)); 842296465Sdelphij} 843296465Sdelphij 84455714Skrisstatic int get_client_finished(SSL *s) 845296465Sdelphij{ 846296465Sdelphij unsigned char *p; 847296465Sdelphij int i, n; 848296465Sdelphij unsigned long len; 84955714Skris 850296465Sdelphij p = (unsigned char *)s->init_buf->data; 851296465Sdelphij if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A) { 852296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), 1 - s->init_num); 853296465Sdelphij if (i < 1 - s->init_num) 854296465Sdelphij return (ssl2_part_read(s, SSL_F_GET_CLIENT_FINISHED, i)); 855296465Sdelphij s->init_num += i; 85655714Skris 857296465Sdelphij if (*p != SSL2_MT_CLIENT_FINISHED) { 858296465Sdelphij if (*p != SSL2_MT_ERROR) { 859296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 860296465Sdelphij SSLerr(SSL_F_GET_CLIENT_FINISHED, 861296465Sdelphij SSL_R_READ_WRONG_PACKET_TYPE); 862296465Sdelphij } else { 863296465Sdelphij SSLerr(SSL_F_GET_CLIENT_FINISHED, SSL_R_PEER_ERROR); 864296465Sdelphij /* try to read the error message */ 865296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num); 866296465Sdelphij return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i); 867296465Sdelphij } 868296465Sdelphij return (-1); 869296465Sdelphij } 870296465Sdelphij s->state = SSL2_ST_GET_CLIENT_FINISHED_B; 871296465Sdelphij } 87255714Skris 873296465Sdelphij /* SSL2_ST_GET_CLIENT_FINISHED_B */ 874296465Sdelphij if (s->s2->conn_id_length > sizeof s->s2->conn_id) { 875296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 876296465Sdelphij SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); 877296465Sdelphij return -1; 878296465Sdelphij } 879296465Sdelphij len = 1 + (unsigned long)s->s2->conn_id_length; 880296465Sdelphij n = (int)len - s->init_num; 881296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), n); 882296465Sdelphij if (i < n) { 883296465Sdelphij return (ssl2_part_read(s, SSL_F_GET_CLIENT_FINISHED, i)); 884296465Sdelphij } 885296465Sdelphij if (s->msg_callback) { 886296465Sdelphij /* CLIENT-FINISHED */ 887296465Sdelphij s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); 888296465Sdelphij } 889296465Sdelphij p += 1; 890296465Sdelphij if (memcmp(p, s->s2->conn_id, s->s2->conn_id_length) != 0) { 891296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 892296465Sdelphij SSLerr(SSL_F_GET_CLIENT_FINISHED, SSL_R_CONNECTION_ID_IS_DIFFERENT); 893296465Sdelphij return (-1); 894296465Sdelphij } 895296465Sdelphij return (1); 896296465Sdelphij} 89755714Skris 89855714Skrisstatic int server_verify(SSL *s) 899296465Sdelphij{ 900296465Sdelphij unsigned char *p; 90155714Skris 902296465Sdelphij if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A) { 903296465Sdelphij p = (unsigned char *)s->init_buf->data; 904296465Sdelphij *(p++) = SSL2_MT_SERVER_VERIFY; 905296465Sdelphij if (s->s2->challenge_length > sizeof s->s2->challenge) { 906296465Sdelphij SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR); 907296465Sdelphij return -1; 908296465Sdelphij } 909296465Sdelphij memcpy(p, s->s2->challenge, (unsigned int)s->s2->challenge_length); 910296465Sdelphij /* p+=s->s2->challenge_length; */ 91155714Skris 912296465Sdelphij s->state = SSL2_ST_SEND_SERVER_VERIFY_B; 913296465Sdelphij s->init_num = s->s2->challenge_length + 1; 914296465Sdelphij s->init_off = 0; 915296465Sdelphij } 916296465Sdelphij return (ssl2_do_write(s)); 917296465Sdelphij} 91855714Skris 91955714Skrisstatic int server_finish(SSL *s) 920296465Sdelphij{ 921296465Sdelphij unsigned char *p; 92255714Skris 923296465Sdelphij if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A) { 924296465Sdelphij p = (unsigned char *)s->init_buf->data; 925296465Sdelphij *(p++) = SSL2_MT_SERVER_FINISHED; 92655714Skris 927296465Sdelphij if (s->session->session_id_length > sizeof s->session->session_id) { 928296465Sdelphij SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR); 929296465Sdelphij return -1; 930296465Sdelphij } 931296465Sdelphij memcpy(p, s->session->session_id, 932296465Sdelphij (unsigned int)s->session->session_id_length); 933296465Sdelphij /* p+=s->session->session_id_length; */ 93455714Skris 935296465Sdelphij s->state = SSL2_ST_SEND_SERVER_FINISHED_B; 936296465Sdelphij s->init_num = s->session->session_id_length + 1; 937296465Sdelphij s->init_off = 0; 938296465Sdelphij } 93955714Skris 940296465Sdelphij /* SSL2_ST_SEND_SERVER_FINISHED_B */ 941296465Sdelphij return (ssl2_do_write(s)); 942296465Sdelphij} 94355714Skris 94455714Skris/* send the request and check the response */ 94555714Skrisstatic int request_certificate(SSL *s) 946296465Sdelphij{ 947296465Sdelphij const unsigned char *cp; 948296465Sdelphij unsigned char *p, *p2, *buf2; 949296465Sdelphij unsigned char *ccd; 950296465Sdelphij int i, j, ctype, ret = -1; 951296465Sdelphij unsigned long len; 952296465Sdelphij X509 *x509 = NULL; 953296465Sdelphij STACK_OF(X509) *sk = NULL; 95455714Skris 955296465Sdelphij ccd = s->s2->tmp.ccl; 956296465Sdelphij if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A) { 957296465Sdelphij p = (unsigned char *)s->init_buf->data; 958296465Sdelphij *(p++) = SSL2_MT_REQUEST_CERTIFICATE; 959296465Sdelphij *(p++) = SSL2_AT_MD5_WITH_RSA_ENCRYPTION; 960296465Sdelphij if (RAND_pseudo_bytes(ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0) 961296465Sdelphij return -1; 962296465Sdelphij memcpy(p, ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH); 96355714Skris 964296465Sdelphij s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_B; 965296465Sdelphij s->init_num = SSL2_MIN_CERT_CHALLENGE_LENGTH + 2; 966296465Sdelphij s->init_off = 0; 967296465Sdelphij } 96855714Skris 969296465Sdelphij if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B) { 970296465Sdelphij i = ssl2_do_write(s); 971296465Sdelphij if (i <= 0) { 972296465Sdelphij ret = i; 973296465Sdelphij goto end; 974296465Sdelphij } 97555714Skris 976296465Sdelphij s->init_num = 0; 977296465Sdelphij s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_C; 978296465Sdelphij } 97955714Skris 980296465Sdelphij if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C) { 981296465Sdelphij p = (unsigned char *)s->init_buf->data; 982296465Sdelphij /* try to read 6 octets ... */ 983296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), 6 - s->init_num); 984296465Sdelphij /* 985296465Sdelphij * ... but don't call ssl2_part_read now if we got at least 3 986296465Sdelphij * (probably NO-CERTIFICATE-ERROR) 987296465Sdelphij */ 988296465Sdelphij if (i < 3 - s->init_num) { 989296465Sdelphij ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, i); 990296465Sdelphij goto end; 991296465Sdelphij } 992296465Sdelphij s->init_num += i; 99355714Skris 994296465Sdelphij if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR)) { 995296465Sdelphij n2s(p, i); 996296465Sdelphij if (i != SSL2_PE_NO_CERTIFICATE) { 997296465Sdelphij /* 998296465Sdelphij * not the error message we expected -- let ssl2_part_read 999296465Sdelphij * handle it 1000296465Sdelphij */ 1001296465Sdelphij s->init_num -= 3; 1002296465Sdelphij ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, 3); 1003296465Sdelphij goto end; 1004296465Sdelphij } 100589840Skris 1006296465Sdelphij if (s->msg_callback) { 1007296465Sdelphij /* ERROR */ 1008296465Sdelphij s->msg_callback(0, s->version, 0, p, 3, s, 1009296465Sdelphij s->msg_callback_arg); 1010296465Sdelphij } 1011110007Smarkm 1012296465Sdelphij /* 1013296465Sdelphij * this is the one place where we can recover from an SSL 2.0 1014296465Sdelphij * error 1015296465Sdelphij */ 101689840Skris 1017296465Sdelphij if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) { 1018296465Sdelphij ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE); 1019296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, 1020296465Sdelphij SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); 1021296465Sdelphij goto end; 1022296465Sdelphij } 1023296465Sdelphij ret = 1; 1024296465Sdelphij goto end; 1025296465Sdelphij } 1026296465Sdelphij if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6)) { 1027296465Sdelphij ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 1028296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_SHORT_READ); 1029296465Sdelphij goto end; 1030296465Sdelphij } 1031296465Sdelphij if (s->init_num != 6) { 1032296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR); 1033296465Sdelphij goto end; 1034296465Sdelphij } 103555714Skris 1036296465Sdelphij /* ok we have a response */ 1037296465Sdelphij /* certificate type, there is only one right now. */ 1038296465Sdelphij ctype = *(p++); 1039296465Sdelphij if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) { 1040296465Sdelphij ssl2_return_error(s, SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); 1041296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_BAD_RESPONSE_ARGUMENT); 1042296465Sdelphij goto end; 1043296465Sdelphij } 1044296465Sdelphij n2s(p, i); 1045296465Sdelphij s->s2->tmp.clen = i; 1046296465Sdelphij n2s(p, i); 1047296465Sdelphij s->s2->tmp.rlen = i; 1048296465Sdelphij s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_D; 1049296465Sdelphij } 105055714Skris 1051296465Sdelphij /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */ 1052296465Sdelphij p = (unsigned char *)s->init_buf->data; 1053296465Sdelphij len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen; 1054296465Sdelphij if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 1055296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_MESSAGE_TOO_LONG); 1056296465Sdelphij goto end; 1057296465Sdelphij } 1058296465Sdelphij j = (int)len - s->init_num; 1059296465Sdelphij i = ssl2_read(s, (char *)&(p[s->init_num]), j); 1060296465Sdelphij if (i < j) { 1061296465Sdelphij ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, i); 1062296465Sdelphij goto end; 1063296465Sdelphij } 1064296465Sdelphij if (s->msg_callback) { 1065296465Sdelphij /* CLIENT-CERTIFICATE */ 1066296465Sdelphij s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); 1067296465Sdelphij } 1068296465Sdelphij p += 6; 106955714Skris 1070296465Sdelphij cp = p; 1071296465Sdelphij x509 = (X509 *)d2i_X509(NULL, &cp, (long)s->s2->tmp.clen); 1072296465Sdelphij if (x509 == NULL) { 1073296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_X509_LIB); 1074296465Sdelphij goto msg_end; 1075296465Sdelphij } 107655714Skris 1077296465Sdelphij if (((sk = sk_X509_new_null()) == NULL) || (!sk_X509_push(sk, x509))) { 1078296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1079296465Sdelphij goto msg_end; 1080296465Sdelphij } 108155714Skris 1082296465Sdelphij i = ssl_verify_cert_chain(s, sk); 108355714Skris 1084296465Sdelphij if (i > 0) { /* we like the packet, now check the chksum */ 1085296465Sdelphij EVP_MD_CTX ctx; 1086296465Sdelphij EVP_PKEY *pkey = NULL; 108755714Skris 1088296465Sdelphij EVP_MD_CTX_init(&ctx); 1089296465Sdelphij EVP_VerifyInit_ex(&ctx, s->ctx->rsa_md5, NULL); 1090296465Sdelphij EVP_VerifyUpdate(&ctx, s->s2->key_material, 1091296465Sdelphij s->s2->key_material_length); 1092296465Sdelphij EVP_VerifyUpdate(&ctx, ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH); 109355714Skris 1094296465Sdelphij i = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, NULL); 1095296465Sdelphij buf2 = OPENSSL_malloc((unsigned int)i); 1096296465Sdelphij if (buf2 == NULL) { 1097296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1098296465Sdelphij goto msg_end; 1099296465Sdelphij } 1100296465Sdelphij p2 = buf2; 1101296465Sdelphij i = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, &p2); 1102296465Sdelphij EVP_VerifyUpdate(&ctx, buf2, (unsigned int)i); 1103296465Sdelphij OPENSSL_free(buf2); 110455714Skris 1105296465Sdelphij pkey = X509_get_pubkey(x509); 1106296465Sdelphij if (pkey == NULL) 1107296465Sdelphij goto end; 1108296465Sdelphij i = EVP_VerifyFinal(&ctx, cp, s->s2->tmp.rlen, pkey); 1109296465Sdelphij EVP_PKEY_free(pkey); 1110296465Sdelphij EVP_MD_CTX_cleanup(&ctx); 111155714Skris 1112296465Sdelphij if (i > 0) { 1113296465Sdelphij if (s->session->peer != NULL) 1114296465Sdelphij X509_free(s->session->peer); 1115296465Sdelphij s->session->peer = x509; 1116296465Sdelphij CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509); 1117296465Sdelphij s->session->verify_result = s->verify_result; 1118296465Sdelphij ret = 1; 1119296465Sdelphij goto end; 1120296465Sdelphij } else { 1121296465Sdelphij SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_BAD_CHECKSUM); 1122296465Sdelphij goto msg_end; 1123296465Sdelphij } 1124296465Sdelphij } else { 1125296465Sdelphij msg_end: 1126296465Sdelphij ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE); 1127296465Sdelphij } 1128296465Sdelphij end: 1129296465Sdelphij sk_X509_free(sk); 1130296465Sdelphij X509_free(x509); 1131296465Sdelphij return (ret); 1132296465Sdelphij} 1133296465Sdelphij 113455714Skrisstatic int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, 1135296465Sdelphij unsigned char *to, int padding) 1136296465Sdelphij{ 1137296465Sdelphij RSA *rsa; 1138296465Sdelphij int i; 113955714Skris 1140296465Sdelphij if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)) { 1141296465Sdelphij SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, SSL_R_NO_PRIVATEKEY); 1142296465Sdelphij return (-1); 1143296465Sdelphij } 1144296465Sdelphij if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA) { 1145296465Sdelphij SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, SSL_R_PUBLIC_KEY_IS_NOT_RSA); 1146296465Sdelphij return (-1); 1147296465Sdelphij } 1148296465Sdelphij rsa = c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa; 114955714Skris 1150296465Sdelphij /* we have the public key */ 1151296465Sdelphij i = RSA_private_decrypt(len, from, to, rsa, padding); 1152296465Sdelphij if (i < 0) 1153296465Sdelphij SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, ERR_R_RSA_LIB); 1154296465Sdelphij return (i); 1155296465Sdelphij} 1156296465Sdelphij#else /* !OPENSSL_NO_SSL2 */ 115759194Skris 115859194Skris# if PEDANTIC 1159296465Sdelphijstatic void *dummy = &dummy; 116059194Skris# endif 116159194Skris 116255714Skris#endif 1163