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s2_clnt.c 30 KB

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  1. /* ssl/s2_clnt.c */
  2. /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  3. * All rights reserved.
  4. *
  5. * This package is an SSL implementation written
  6. * by Eric Young (eay@cryptsoft.com).
  7. * The implementation was written so as to conform with Netscapes SSL.
  8. *
  9. * This library is free for commercial and non-commercial use as long as
  10. * the following conditions are aheared to. The following conditions
  11. * apply to all code found in this distribution, be it the RC4, RSA,
  12. * lhash, DES, etc., code; not just the SSL code. The SSL documentation
  13. * included with this distribution is covered by the same copyright terms
  14. * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15. *
  16. * Copyright remains Eric Young's, and as such any Copyright notices in
  17. * the code are not to be removed.
  18. * If this package is used in a product, Eric Young should be given attribution
  19. * as the author of the parts of the library used.
  20. * This can be in the form of a textual message at program startup or
  21. * in documentation (online or textual) provided with the package.
  22. *
  23. * Redistribution and use in source and binary forms, with or without
  24. * modification, are permitted provided that the following conditions
  25. * are met:
  26. * 1. Redistributions of source code must retain the copyright
  27. * notice, this list of conditions and the following disclaimer.
  28. * 2. Redistributions in binary form must reproduce the above copyright
  29. * notice, this list of conditions and the following disclaimer in the
  30. * documentation and/or other materials provided with the distribution.
  31. * 3. All advertising materials mentioning features or use of this software
  32. * must display the following acknowledgement:
  33. * "This product includes cryptographic software written by
  34. * Eric Young (eay@cryptsoft.com)"
  35. * The word 'cryptographic' can be left out if the rouines from the library
  36. * being used are not cryptographic related :-).
  37. * 4. If you include any Windows specific code (or a derivative thereof) from
  38. * the apps directory (application code) you must include an acknowledgement:
  39. * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40. *
  41. * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51. * SUCH DAMAGE.
  52. *
  53. * The licence and distribution terms for any publically available version or
  54. * derivative of this code cannot be changed. i.e. this code cannot simply be
  55. * copied and put under another distribution licence
  56. * [including the GNU Public Licence.]
  57. */
  58. /* ====================================================================
  59. * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
  60. *
  61. * Redistribution and use in source and binary forms, with or without
  62. * modification, are permitted provided that the following conditions
  63. * are met:
  64. *
  65. * 1. Redistributions of source code must retain the above copyright
  66. * notice, this list of conditions and the following disclaimer.
  67. *
  68. * 2. Redistributions in binary form must reproduce the above copyright
  69. * notice, this list of conditions and the following disclaimer in
  70. * the documentation and/or other materials provided with the
  71. * distribution.
  72. *
  73. * 3. All advertising materials mentioning features or use of this
  74. * software must display the following acknowledgment:
  75. * "This product includes software developed by the OpenSSL Project
  76. * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77. *
  78. * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79. * endorse or promote products derived from this software without
  80. * prior written permission. For written permission, please contact
  81. * openssl-core@openssl.org.
  82. *
  83. * 5. Products derived from this software may not be called "OpenSSL"
  84. * nor may "OpenSSL" appear in their names without prior written
  85. * permission of the OpenSSL Project.
  86. *
  87. * 6. Redistributions of any form whatsoever must retain the following
  88. * acknowledgment:
  89. * "This product includes software developed by the OpenSSL Project
  90. * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91. *
  92. * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93. * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95. * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96. * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98. * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  100. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  101. * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  102. * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  103. * OF THE POSSIBILITY OF SUCH DAMAGE.
  104. * ====================================================================
  105. *
  106. * This product includes cryptographic software written by Eric Young
  107. * (eay@cryptsoft.com). This product includes software written by Tim
  108. * Hudson (tjh@cryptsoft.com).
  109. *
  110. */
  111. #include "ssl_locl.h"
  112. #ifndef OPENSSL_NO_SSL2
  113. #include <stdio.h>
  114. #include <openssl/rand.h>
  115. #include <openssl/buffer.h>
  116. #include <openssl/objects.h>
  117. #include <openssl/evp.h>
  118. static const SSL_METHOD *ssl2_get_client_method(int ver);
  119. static int get_server_finished(SSL *s);
  120. static int get_server_verify(SSL *s);
  121. static int get_server_hello(SSL *s);
  122. static int client_hello(SSL *s);
  123. static int client_master_key(SSL *s);
  124. static int client_finished(SSL *s);
  125. static int client_certificate(SSL *s);
  126. static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
  127. unsigned char *to,int padding);
  128. #define BREAK break
  129. static const SSL_METHOD *ssl2_get_client_method(int ver)
  130. {
  131. if (ver == SSL2_VERSION)
  132. return(SSLv2_client_method());
  133. else
  134. return(NULL);
  135. }
  136. IMPLEMENT_ssl2_meth_func(SSLv2_client_method,
  137. ssl_undefined_function,
  138. ssl2_connect,
  139. ssl2_get_client_method)
  140. int ssl2_connect(SSL *s)
  141. {
  142. unsigned long l=(unsigned long)time(NULL);
  143. BUF_MEM *buf=NULL;
  144. int ret= -1;
  145. void (*cb)(const SSL *ssl,int type,int val)=NULL;
  146. int new_state,state;
  147. RAND_add(&l,sizeof(l),0);
  148. ERR_clear_error();
  149. clear_sys_error();
  150. if (s->info_callback != NULL)
  151. cb=s->info_callback;
  152. else if (s->ctx->info_callback != NULL)
  153. cb=s->ctx->info_callback;
  154. /* init things to blank */
  155. s->in_handshake++;
  156. if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
  157. for (;;)
  158. {
  159. state=s->state;
  160. switch (s->state)
  161. {
  162. case SSL_ST_BEFORE:
  163. case SSL_ST_CONNECT:
  164. case SSL_ST_BEFORE|SSL_ST_CONNECT:
  165. case SSL_ST_OK|SSL_ST_CONNECT:
  166. s->server=0;
  167. if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
  168. s->version=SSL2_VERSION;
  169. s->type=SSL_ST_CONNECT;
  170. buf=s->init_buf;
  171. if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
  172. {
  173. ret= -1;
  174. goto end;
  175. }
  176. if (!BUF_MEM_grow(buf,
  177. SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
  178. {
  179. if (buf == s->init_buf)
  180. buf=NULL;
  181. ret= -1;
  182. goto end;
  183. }
  184. s->init_buf=buf;
  185. buf=NULL;
  186. s->init_num=0;
  187. s->state=SSL2_ST_SEND_CLIENT_HELLO_A;
  188. s->ctx->stats.sess_connect++;
  189. s->handshake_func=ssl2_connect;
  190. BREAK;
  191. case SSL2_ST_SEND_CLIENT_HELLO_A:
  192. case SSL2_ST_SEND_CLIENT_HELLO_B:
  193. s->shutdown=0;
  194. ret=client_hello(s);
  195. if (ret <= 0) goto end;
  196. s->init_num=0;
  197. s->state=SSL2_ST_GET_SERVER_HELLO_A;
  198. BREAK;
  199. case SSL2_ST_GET_SERVER_HELLO_A:
  200. case SSL2_ST_GET_SERVER_HELLO_B:
  201. ret=get_server_hello(s);
  202. if (ret <= 0) goto end;
  203. s->init_num=0;
  204. if (!s->hit) /* new session */
  205. {
  206. s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
  207. BREAK;
  208. }
  209. else
  210. {
  211. s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
  212. break;
  213. }
  214. case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
  215. case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
  216. ret=client_master_key(s);
  217. if (ret <= 0) goto end;
  218. s->init_num=0;
  219. s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
  220. break;
  221. case SSL2_ST_CLIENT_START_ENCRYPTION:
  222. /* Ok, we now have all the stuff needed to
  223. * start encrypting, so lets fire it up :-) */
  224. if (!ssl2_enc_init(s,1))
  225. {
  226. ret= -1;
  227. goto end;
  228. }
  229. s->s2->clear_text=0;
  230. s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;
  231. break;
  232. case SSL2_ST_SEND_CLIENT_FINISHED_A:
  233. case SSL2_ST_SEND_CLIENT_FINISHED_B:
  234. ret=client_finished(s);
  235. if (ret <= 0) goto end;
  236. s->init_num=0;
  237. s->state=SSL2_ST_GET_SERVER_VERIFY_A;
  238. break;
  239. case SSL2_ST_GET_SERVER_VERIFY_A:
  240. case SSL2_ST_GET_SERVER_VERIFY_B:
  241. ret=get_server_verify(s);
  242. if (ret <= 0) goto end;
  243. s->init_num=0;
  244. s->state=SSL2_ST_GET_SERVER_FINISHED_A;
  245. break;
  246. case SSL2_ST_GET_SERVER_FINISHED_A:
  247. case SSL2_ST_GET_SERVER_FINISHED_B:
  248. ret=get_server_finished(s);
  249. if (ret <= 0) goto end;
  250. break;
  251. case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:
  252. case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:
  253. case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:
  254. case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:
  255. case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:
  256. ret=client_certificate(s);
  257. if (ret <= 0) goto end;
  258. s->init_num=0;
  259. s->state=SSL2_ST_GET_SERVER_FINISHED_A;
  260. break;
  261. case SSL_ST_OK:
  262. if (s->init_buf != NULL)
  263. {
  264. BUF_MEM_free(s->init_buf);
  265. s->init_buf=NULL;
  266. }
  267. s->init_num=0;
  268. /* ERR_clear_error();*/
  269. /* If we want to cache session-ids in the client
  270. * and we successfully add the session-id to the
  271. * cache, and there is a callback, then pass it out.
  272. * 26/11/96 - eay - only add if not a re-used session.
  273. */
  274. ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
  275. if (s->hit) s->ctx->stats.sess_hit++;
  276. ret=1;
  277. /* s->server=0; */
  278. s->ctx->stats.sess_connect_good++;
  279. if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
  280. goto end;
  281. /* break; */
  282. default:
  283. SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);
  284. return(-1);
  285. /* break; */
  286. }
  287. if ((cb != NULL) && (s->state != state))
  288. {
  289. new_state=s->state;
  290. s->state=state;
  291. cb(s,SSL_CB_CONNECT_LOOP,1);
  292. s->state=new_state;
  293. }
  294. }
  295. end:
  296. s->in_handshake--;
  297. if (buf != NULL)
  298. BUF_MEM_free(buf);
  299. if (cb != NULL)
  300. cb(s,SSL_CB_CONNECT_EXIT,ret);
  301. return(ret);
  302. }
  303. static int get_server_hello(SSL *s)
  304. {
  305. unsigned char *buf;
  306. unsigned char *p;
  307. int i,j;
  308. unsigned long len;
  309. STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
  310. buf=(unsigned char *)s->init_buf->data;
  311. p=buf;
  312. if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
  313. {
  314. i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
  315. if (i < (11-s->init_num))
  316. return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
  317. s->init_num = 11;
  318. if (*(p++) != SSL2_MT_SERVER_HELLO)
  319. {
  320. if (p[-1] != SSL2_MT_ERROR)
  321. {
  322. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  323. SSLerr(SSL_F_GET_SERVER_HELLO,
  324. SSL_R_READ_WRONG_PACKET_TYPE);
  325. }
  326. else
  327. SSLerr(SSL_F_GET_SERVER_HELLO,
  328. SSL_R_PEER_ERROR);
  329. return(-1);
  330. }
  331. #ifdef __APPLE_CC__
  332. /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
  333. * workaround. <appro@fy.chalmers.se> */
  334. s->hit=(i=*(p++))?1:0;
  335. #else
  336. s->hit=(*(p++))?1:0;
  337. #endif
  338. s->s2->tmp.cert_type= *(p++);
  339. n2s(p,i);
  340. if (i < s->version) s->version=i;
  341. n2s(p,i); s->s2->tmp.cert_length=i;
  342. n2s(p,i); s->s2->tmp.csl=i;
  343. n2s(p,i); s->s2->tmp.conn_id_length=i;
  344. s->state=SSL2_ST_GET_SERVER_HELLO_B;
  345. }
  346. /* SSL2_ST_GET_SERVER_HELLO_B */
  347. len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
  348. if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
  349. {
  350. SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
  351. return -1;
  352. }
  353. j = (int)len - s->init_num;
  354. i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
  355. if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
  356. if (s->msg_callback)
  357. s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
  358. /* things are looking good */
  359. p = buf + 11;
  360. if (s->hit)
  361. {
  362. if (s->s2->tmp.cert_length != 0)
  363. {
  364. SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
  365. return(-1);
  366. }
  367. if (s->s2->tmp.cert_type != 0)
  368. {
  369. if (!(s->options &
  370. SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))
  371. {
  372. SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
  373. return(-1);
  374. }
  375. }
  376. if (s->s2->tmp.csl != 0)
  377. {
  378. SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
  379. return(-1);
  380. }
  381. }
  382. else
  383. {
  384. #ifdef undef
  385. /* very bad */
  386. memset(s->session->session_id,0,
  387. SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
  388. s->session->session_id_length=0;
  389. */
  390. #endif
  391. /* we need to do this in case we were trying to reuse a
  392. * client session but others are already reusing it.
  393. * If this was a new 'blank' session ID, the session-id
  394. * length will still be 0 */
  395. if (s->session->session_id_length > 0)
  396. {
  397. if (!ssl_get_new_session(s,0))
  398. {
  399. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  400. return(-1);
  401. }
  402. }
  403. if (ssl2_set_certificate(s,s->s2->tmp.cert_type,
  404. s->s2->tmp.cert_length,p) <= 0)
  405. {
  406. ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
  407. return(-1);
  408. }
  409. p+=s->s2->tmp.cert_length;
  410. if (s->s2->tmp.csl == 0)
  411. {
  412. ssl2_return_error(s,SSL2_PE_NO_CIPHER);
  413. SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);
  414. return(-1);
  415. }
  416. /* We have just received a list of ciphers back from the
  417. * server. We need to get the ones that match, then select
  418. * the one we want the most :-). */
  419. /* load the ciphers */
  420. sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,
  421. &s->session->ciphers);
  422. p+=s->s2->tmp.csl;
  423. if (sk == NULL)
  424. {
  425. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  426. SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
  427. return(-1);
  428. }
  429. (void)sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);
  430. /* get the array of ciphers we will accept */
  431. cl=SSL_get_ciphers(s);
  432. (void)sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);
  433. /*
  434. * If server preference flag set, choose the first
  435. * (highest priority) cipher the server sends, otherwise
  436. * client preference has priority.
  437. */
  438. if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
  439. {
  440. prio = sk;
  441. allow = cl;
  442. }
  443. else
  444. {
  445. prio = cl;
  446. allow = sk;
  447. }
  448. /* In theory we could have ciphers sent back that we
  449. * don't want to use but that does not matter since we
  450. * will check against the list we originally sent and
  451. * for performance reasons we should not bother to match
  452. * the two lists up just to check. */
  453. for (i=0; i<sk_SSL_CIPHER_num(prio); i++)
  454. {
  455. if (sk_SSL_CIPHER_find(allow,
  456. sk_SSL_CIPHER_value(prio,i)) >= 0)
  457. break;
  458. }
  459. if (i >= sk_SSL_CIPHER_num(prio))
  460. {
  461. ssl2_return_error(s,SSL2_PE_NO_CIPHER);
  462. SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);
  463. return(-1);
  464. }
  465. s->session->cipher=sk_SSL_CIPHER_value(prio,i);
  466. if (s->session->peer != NULL) /* can't happen*/
  467. {
  468. ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
  469. SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
  470. return(-1);
  471. }
  472. s->session->peer = s->session->sess_cert->peer_key->x509;
  473. /* peer_key->x509 has been set by ssl2_set_certificate. */
  474. CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
  475. }
  476. if (s->session->sess_cert == NULL
  477. || s->session->peer != s->session->sess_cert->peer_key->x509)
  478. /* can't happen */
  479. {
  480. ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
  481. SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
  482. return(-1);
  483. }
  484. s->s2->conn_id_length=s->s2->tmp.conn_id_length;
  485. if (s->s2->conn_id_length > sizeof s->s2->conn_id)
  486. {
  487. ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
  488. SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
  489. return -1;
  490. }
  491. memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
  492. return(1);
  493. }
  494. static int client_hello(SSL *s)
  495. {
  496. unsigned char *buf;
  497. unsigned char *p,*d;
  498. /* CIPHER **cipher;*/
  499. int i,n,j;
  500. buf=(unsigned char *)s->init_buf->data;
  501. if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
  502. {
  503. if ((s->session == NULL) ||
  504. (s->session->ssl_version != s->version))
  505. {
  506. if (!ssl_get_new_session(s,0))
  507. {
  508. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  509. return(-1);
  510. }
  511. }
  512. /* else use the pre-loaded session */
  513. p=buf; /* header */
  514. d=p+9; /* data section */
  515. *(p++)=SSL2_MT_CLIENT_HELLO; /* type */
  516. s2n(SSL2_VERSION,p); /* version */
  517. n=j=0;
  518. n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d,0);
  519. d+=n;
  520. if (n == 0)
  521. {
  522. SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
  523. return(-1);
  524. }
  525. s2n(n,p); /* cipher spec num bytes */
  526. if ((s->session->session_id_length > 0) &&
  527. (s->session->session_id_length <=
  528. SSL2_MAX_SSL_SESSION_ID_LENGTH))
  529. {
  530. i=s->session->session_id_length;
  531. s2n(i,p); /* session id length */
  532. memcpy(d,s->session->session_id,(unsigned int)i);
  533. d+=i;
  534. }
  535. else
  536. {
  537. s2n(0,p);
  538. }
  539. s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
  540. s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */
  541. /*challenge id data*/
  542. if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)
  543. return -1;
  544. memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
  545. d+=SSL2_CHALLENGE_LENGTH;
  546. s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
  547. s->init_num=d-buf;
  548. s->init_off=0;
  549. }
  550. /* SSL2_ST_SEND_CLIENT_HELLO_B */
  551. return(ssl2_do_write(s));
  552. }
  553. static int client_master_key(SSL *s)
  554. {
  555. unsigned char *buf;
  556. unsigned char *p,*d;
  557. int clear,enc,karg,i;
  558. SSL_SESSION *sess;
  559. const EVP_CIPHER *c;
  560. const EVP_MD *md;
  561. buf=(unsigned char *)s->init_buf->data;
  562. if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
  563. {
  564. if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL))
  565. {
  566. ssl2_return_error(s,SSL2_PE_NO_CIPHER);
  567. SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
  568. return(-1);
  569. }
  570. sess=s->session;
  571. p=buf;
  572. d=p+10;
  573. *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
  574. i=ssl_put_cipher_by_char(s,sess->cipher,p);
  575. p+=i;
  576. /* make key_arg data */
  577. i=EVP_CIPHER_iv_length(c);
  578. sess->key_arg_length=i;
  579. if (i > SSL_MAX_KEY_ARG_LENGTH)
  580. {
  581. ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
  582. SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
  583. return -1;
  584. }
  585. if (i > 0)
  586. if (RAND_pseudo_bytes(sess->key_arg,i) <= 0)
  587. return -1;
  588. /* make a master key */
  589. i=EVP_CIPHER_key_length(c);
  590. sess->master_key_length=i;
  591. if (i > 0)
  592. {
  593. if (i > (int)sizeof(sess->master_key))
  594. {
  595. ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
  596. SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
  597. return -1;
  598. }
  599. if (RAND_bytes(sess->master_key,i) <= 0)
  600. {
  601. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  602. return(-1);
  603. }
  604. }
  605. if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
  606. enc=8;
  607. else if (SSL_C_IS_EXPORT(sess->cipher))
  608. enc=5;
  609. else
  610. enc=i;
  611. if ((int)i < enc)
  612. {
  613. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  614. SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
  615. return(-1);
  616. }
  617. clear=i-enc;
  618. s2n(clear,p);
  619. memcpy(d,sess->master_key,(unsigned int)clear);
  620. d+=clear;
  621. enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
  622. &(sess->master_key[clear]),d,
  623. (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
  624. if (enc <= 0)
  625. {
  626. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  627. SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
  628. return(-1);
  629. }
  630. #ifdef PKCS1_CHECK
  631. if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
  632. if (s->options & SSL_OP_PKCS1_CHECK_2)
  633. sess->master_key[clear]++;
  634. #endif
  635. s2n(enc,p);
  636. d+=enc;
  637. karg=sess->key_arg_length;
  638. s2n(karg,p); /* key arg size */
  639. if (karg > (int)sizeof(sess->key_arg))
  640. {
  641. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  642. SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
  643. return -1;
  644. }
  645. memcpy(d,sess->key_arg,(unsigned int)karg);
  646. d+=karg;
  647. s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
  648. s->init_num=d-buf;
  649. s->init_off=0;
  650. }
  651. /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
  652. return(ssl2_do_write(s));
  653. }
  654. static int client_finished(SSL *s)
  655. {
  656. unsigned char *p;
  657. if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)
  658. {
  659. p=(unsigned char *)s->init_buf->data;
  660. *(p++)=SSL2_MT_CLIENT_FINISHED;
  661. if (s->s2->conn_id_length > sizeof s->s2->conn_id)
  662. {
  663. SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
  664. return -1;
  665. }
  666. memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);
  667. s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;
  668. s->init_num=s->s2->conn_id_length+1;
  669. s->init_off=0;
  670. }
  671. return(ssl2_do_write(s));
  672. }
  673. /* read the data and then respond */
  674. static int client_certificate(SSL *s)
  675. {
  676. unsigned char *buf;
  677. unsigned char *p,*d;
  678. int i;
  679. unsigned int n;
  680. int cert_ch_len;
  681. unsigned char *cert_ch;
  682. buf=(unsigned char *)s->init_buf->data;
  683. /* We have a cert associated with the SSL, so attach it to
  684. * the session if it does not have one */
  685. if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)
  686. {
  687. i=ssl2_read(s,(char *)&(buf[s->init_num]),
  688. SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);
  689. if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))
  690. return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));
  691. s->init_num += i;
  692. if (s->msg_callback)
  693. s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
  694. /* type=buf[0]; */
  695. /* type eq x509 */
  696. if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
  697. {
  698. ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
  699. SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);
  700. return(-1);
  701. }
  702. if ((s->cert == NULL) ||
  703. (s->cert->key->x509 == NULL) ||
  704. (s->cert->key->privatekey == NULL))
  705. {
  706. s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
  707. }
  708. else
  709. s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
  710. }
  711. cert_ch = buf + 2;
  712. cert_ch_len = s->init_num - 2;
  713. if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)
  714. {
  715. X509 *x509=NULL;
  716. EVP_PKEY *pkey=NULL;
  717. /* If we get an error we need to
  718. * ssl->rwstate=SSL_X509_LOOKUP;
  719. * return(error);
  720. * We should then be retried when things are ok and we
  721. * can get a cert or not */
  722. i=0;
  723. if (s->ctx->client_cert_cb != NULL)
  724. {
  725. i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
  726. }
  727. if (i < 0)
  728. {
  729. s->rwstate=SSL_X509_LOOKUP;
  730. return(-1);
  731. }
  732. s->rwstate=SSL_NOTHING;
  733. if ((i == 1) && (pkey != NULL) && (x509 != NULL))
  734. {
  735. s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
  736. if ( !SSL_use_certificate(s,x509) ||
  737. !SSL_use_PrivateKey(s,pkey))
  738. {
  739. i=0;
  740. }
  741. X509_free(x509);
  742. EVP_PKEY_free(pkey);
  743. }
  744. else if (i == 1)
  745. {
  746. if (x509 != NULL) X509_free(x509);
  747. if (pkey != NULL) EVP_PKEY_free(pkey);
  748. SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
  749. i=0;
  750. }
  751. if (i == 0)
  752. {
  753. /* We have no client certificate to respond with
  754. * so send the correct error message back */
  755. s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
  756. p=buf;
  757. *(p++)=SSL2_MT_ERROR;
  758. s2n(SSL2_PE_NO_CERTIFICATE,p);
  759. s->init_off=0;
  760. s->init_num=3;
  761. /* Write is done at the end */
  762. }
  763. }
  764. if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)
  765. {
  766. return(ssl2_do_write(s));
  767. }
  768. if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)
  769. {
  770. EVP_MD_CTX ctx;
  771. /* ok, now we calculate the checksum
  772. * do it first so we can reuse buf :-) */
  773. p=buf;
  774. EVP_MD_CTX_init(&ctx);
  775. EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);
  776. EVP_SignUpdate(&ctx,s->s2->key_material,
  777. s->s2->key_material_length);
  778. EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
  779. i=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
  780. /* Don't update the signature if it fails - FIXME: probably should handle this better */
  781. if(i > 0)
  782. EVP_SignUpdate(&ctx,buf,(unsigned int)i);
  783. p=buf;
  784. d=p+6;
  785. *(p++)=SSL2_MT_CLIENT_CERTIFICATE;
  786. *(p++)=SSL2_CT_X509_CERTIFICATE;
  787. n=i2d_X509(s->cert->key->x509,&d);
  788. s2n(n,p);
  789. if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))
  790. {
  791. /* this is not good. If things have failed it
  792. * means there so something wrong with the key.
  793. * We will continue with a 0 length signature
  794. */
  795. }
  796. EVP_MD_CTX_cleanup(&ctx);
  797. s2n(n,p);
  798. d+=n;
  799. s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
  800. s->init_num=d-buf;
  801. s->init_off=0;
  802. }
  803. /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
  804. return(ssl2_do_write(s));
  805. }
  806. static int get_server_verify(SSL *s)
  807. {
  808. unsigned char *p;
  809. int i, n, len;
  810. p=(unsigned char *)s->init_buf->data;
  811. if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)
  812. {
  813. i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
  814. if (i < (1-s->init_num))
  815. return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
  816. s->init_num += i;
  817. s->state= SSL2_ST_GET_SERVER_VERIFY_B;
  818. if (*p != SSL2_MT_SERVER_VERIFY)
  819. {
  820. if (p[0] != SSL2_MT_ERROR)
  821. {
  822. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  823. SSLerr(SSL_F_GET_SERVER_VERIFY,
  824. SSL_R_READ_WRONG_PACKET_TYPE);
  825. }
  826. else
  827. {
  828. SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);
  829. /* try to read the error message */
  830. i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
  831. return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
  832. }
  833. return(-1);
  834. }
  835. }
  836. p=(unsigned char *)s->init_buf->data;
  837. len = 1 + s->s2->challenge_length;
  838. n = len - s->init_num;
  839. i = ssl2_read(s,(char *)&(p[s->init_num]),n);
  840. if (i < n)
  841. return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
  842. if (s->msg_callback)
  843. s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
  844. p += 1;
  845. if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)
  846. {
  847. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  848. SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);
  849. return(-1);
  850. }
  851. return(1);
  852. }
  853. static int get_server_finished(SSL *s)
  854. {
  855. unsigned char *buf;
  856. unsigned char *p;
  857. int i, n, len;
  858. buf=(unsigned char *)s->init_buf->data;
  859. p=buf;
  860. if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)
  861. {
  862. i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);
  863. if (i < (1-s->init_num))
  864. return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
  865. s->init_num += i;
  866. if (*p == SSL2_MT_REQUEST_CERTIFICATE)
  867. {
  868. s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
  869. return(1);
  870. }
  871. else if (*p != SSL2_MT_SERVER_FINISHED)
  872. {
  873. if (p[0] != SSL2_MT_ERROR)
  874. {
  875. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  876. SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
  877. }
  878. else
  879. {
  880. SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);
  881. /* try to read the error message */
  882. i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
  883. return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
  884. }
  885. return(-1);
  886. }
  887. s->state=SSL2_ST_GET_SERVER_FINISHED_B;
  888. }
  889. len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
  890. n = len - s->init_num;
  891. i = ssl2_read(s,(char *)&(buf[s->init_num]), n);
  892. if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */
  893. return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
  894. s->init_num += i;
  895. if (s->msg_callback)
  896. s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
  897. if (!s->hit) /* new session */
  898. {
  899. /* new session-id */
  900. /* Make sure we were not trying to re-use an old SSL_SESSION
  901. * or bad things can happen */
  902. /* ZZZZZZZZZZZZZ */
  903. s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
  904. memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);
  905. }
  906. else
  907. {
  908. if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))
  909. {
  910. if ((s->session->session_id_length > sizeof s->session->session_id)
  911. || (0 != memcmp(buf + 1, s->session->session_id,
  912. (unsigned int)s->session->session_id_length)))
  913. {
  914. ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
  915. SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
  916. return(-1);
  917. }
  918. }
  919. }
  920. s->state = SSL_ST_OK;
  921. return(1);
  922. }
  923. /* loads in the certificate from the server */
  924. int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)
  925. {
  926. STACK_OF(X509) *sk=NULL;
  927. EVP_PKEY *pkey=NULL;
  928. SESS_CERT *sc=NULL;
  929. int i;
  930. X509 *x509=NULL;
  931. int ret=0;
  932. x509=d2i_X509(NULL,&data,(long)len);
  933. if (x509 == NULL)
  934. {
  935. SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);
  936. goto err;
  937. }
  938. if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))
  939. {
  940. SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);
  941. goto err;
  942. }
  943. i=ssl_verify_cert_chain(s,sk);
  944. if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0))
  945. {
  946. SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
  947. goto err;
  948. }
  949. ERR_clear_error(); /* but we keep s->verify_result */
  950. s->session->verify_result = s->verify_result;
  951. /* server's cert for this session */
  952. sc=ssl_sess_cert_new();
  953. if (sc == NULL)
  954. {
  955. ret= -1;
  956. goto err;
  957. }
  958. if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
  959. s->session->sess_cert=sc;
  960. sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
  961. sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
  962. pkey=X509_get_pubkey(x509);
  963. x509=NULL;
  964. if (pkey == NULL)
  965. {
  966. SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
  967. goto err;
  968. }
  969. if (pkey->type != EVP_PKEY_RSA)
  970. {
  971. SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);
  972. goto err;
  973. }
  974. if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
  975. goto err;
  976. ret=1;
  977. err:
  978. sk_X509_free(sk);
  979. X509_free(x509);
  980. EVP_PKEY_free(pkey);
  981. return(ret);
  982. }
  983. static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
  984. unsigned char *to, int padding)
  985. {
  986. EVP_PKEY *pkey=NULL;
  987. int i= -1;
  988. if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
  989. ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
  990. {
  991. SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
  992. return(-1);
  993. }
  994. if (pkey->type != EVP_PKEY_RSA)
  995. {
  996. SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
  997. goto end;
  998. }
  999. /* we have the public key */
  1000. i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);
  1001. if (i < 0)
  1002. SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);
  1003. end:
  1004. EVP_PKEY_free(pkey);
  1005. return(i);
  1006. }
  1007. #else /* !OPENSSL_NO_SSL2 */
  1008. # if PEDANTIC
  1009. static void *dummy=&dummy;
  1010. # endif
  1011. #endif