2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
61 #include <openssl/buffer.h>
62 #include <openssl/rand.h>
63 #include <openssl/objects.h>
64 #include <openssl/evp.h>
65 #include <openssl/x509.h>
68 /* send s->init_buf in records of type 'type' */
69 int ssl3_do_write(SSL *s, int type)
73 ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
75 if (ret < 0) return(-1);
76 if (type == SSL3_RT_HANDSHAKE)
77 /* should not be done for 'Hello Request's, but in that case
78 * we'll ignore the result anyway */
79 ssl3_finish_mac(s,&s->init_buf->data[s->init_off],ret);
81 if (ret == s->init_num)
88 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
96 d=(unsigned char *)s->init_buf->data;
99 i=s->method->ssl3_enc->final_finish_mac(s,
100 &(s->s3->finish_dgst1),
101 &(s->s3->finish_dgst2),
102 sender,slen,s->s3->tmp.finish_md);
103 s->s3->tmp.finish_md_len = i;
104 memcpy(p, s->s3->tmp.finish_md, i);
109 /* MSVC 1.5 does not clear the top bytes of the word unless
115 *(d++)=SSL3_MT_FINISHED;
117 s->init_num=(int)l+4;
123 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
124 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
127 int ssl3_get_finished(SSL *s, int a, int b)
133 /* the mac has already been generated when we received the
134 * change cipher spec message and is in s->s3->tmp.peer_finish_md
137 n=ssl3_get_message(s,
141 64, /* should actually be 36+4 :-) */
144 if (!ok) return((int)n);
146 /* If this occurs, we have missed a message */
147 if (!s->s3->change_cipher_spec)
149 al=SSL_AD_UNEXPECTED_MESSAGE;
150 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
153 s->s3->change_cipher_spec=0;
155 p = (unsigned char *)s->init_buf->data;
156 i = s->s3->tmp.peer_finish_md_len;
160 al=SSL_AD_DECODE_ERROR;
161 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
165 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
167 al=SSL_AD_DECRYPT_ERROR;
168 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
174 ssl3_send_alert(s,SSL3_AL_FATAL,al);
178 /* for these 2 messages, we need to
179 * ssl->enc_read_ctx re-init
180 * ssl->s3->read_sequence zero
181 * ssl->s3->read_mac_secret re-init
182 * ssl->session->read_sym_enc assign
183 * ssl->session->read_compression assign
184 * ssl->session->read_hash assign
186 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
192 p=(unsigned char *)s->init_buf->data;
200 /* SSL3_ST_CW_CHANGE_B */
201 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
204 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
210 X509_STORE_CTX xs_ctx;
213 /* TLSv1 sends a chain with nothing in it, instead of an alert */
215 if (!BUF_MEM_grow(buf,(int)(10)))
217 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
222 X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL);
227 if (!BUF_MEM_grow(buf,(int)(n+l+3)))
229 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
232 p=(unsigned char *)&(buf->data[l]);
236 if (X509_NAME_cmp(X509_get_subject_name(x),
237 X509_get_issuer_name(x)) == 0) break;
239 i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
240 X509_get_issuer_name(x),&obj);
243 /* Count is one too high since the X509_STORE_get uped the
248 X509_STORE_CTX_cleanup(&xs_ctx);
251 /* Thawte special :-) */
252 if (s->ctx->extra_certs != NULL)
253 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
255 x=sk_X509_value(s->ctx->extra_certs,i);
257 if (!BUF_MEM_grow(buf,(int)(n+l+3)))
259 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
262 p=(unsigned char *)&(buf->data[l]);
269 p=(unsigned char *)&(buf->data[4]);
272 p=(unsigned char *)&(buf->data[0]);
273 *(p++)=SSL3_MT_CERTIFICATE;
279 /* Obtain handshake message of message type 'mt' (any if mt == -1),
280 * maximum acceptable body length 'max'.
281 * The first four bytes (msg_type and length) are read in state 'st1',
282 * the body is read in state 'stn'.
284 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
291 if (s->s3->tmp.reuse_message)
293 s->s3->tmp.reuse_message=0;
294 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
296 al=SSL_AD_UNEXPECTED_MESSAGE;
297 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
301 return((int)s->s3->tmp.message_size);
304 p=(unsigned char *)s->init_buf->data;
306 if (s->state == st1) /* s->init_num < 4 */
312 while (s->init_num < 4)
314 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
318 s->rwstate=SSL_READING;
327 if (p[0] == SSL3_MT_HELLO_REQUEST)
328 /* The server may always send 'Hello Request' messages --
329 * we are doing a handshake anyway now, so ignore them
330 * if their format is correct. Does not count for
332 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
335 while (skip_message);
337 /* s->init_num == 4 */
339 if ((mt >= 0) && (*p != mt))
341 al=SSL_AD_UNEXPECTED_MESSAGE;
342 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
345 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
346 (st1 == SSL3_ST_SR_CERT_A) &&
347 (stn == SSL3_ST_SR_CERT_B))
349 /* At this point we have got an MS SGC second client
350 * hello (maybe we should always allow the client to
351 * start a new handshake?). We need to restart the mac.
352 * Don't increment {num,total}_renegotiations because
353 * we have not completed the handshake. */
354 ssl3_init_finished_mac(s);
357 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, 4);
359 s->s3->tmp.message_type= *(p++);
362 if (l > (unsigned long)max)
364 al=SSL_AD_ILLEGAL_PARAMETER;
365 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
368 if (l && !BUF_MEM_grow(s->init_buf,(int)l))
370 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
373 s->s3->tmp.message_size=l;
379 /* next state (stn) */
380 p=(unsigned char *)s->init_buf->data;
381 n=s->s3->tmp.message_size;
384 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n);
387 s->rwstate=SSL_READING;
394 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num);
398 ssl3_send_alert(s,SSL3_AL_FATAL,al);
404 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
410 pk=X509_get_pubkey(x);
413 if (pk == NULL) goto err;
416 if (i == EVP_PKEY_RSA)
418 ret=SSL_PKEY_RSA_ENC;
421 j=X509_get_ext_count(x);
422 /* check to see if this is a signing only certificate */
423 /* EAY EAY EAY EAY */
426 else if (i == EVP_PKEY_DSA)
428 ret=SSL_PKEY_DSA_SIGN;
430 else if (i == EVP_PKEY_DH)
432 /* if we just have a key, we needs to be guess */
438 j=X509_get_signature_type(x);
439 if (j == EVP_PKEY_RSA)
441 else if (j== EVP_PKEY_DSA)
450 if(!pkey) EVP_PKEY_free(pk);
454 int ssl_verify_alarm_type(long type)
460 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
461 case X509_V_ERR_UNABLE_TO_GET_CRL:
462 al=SSL_AD_UNKNOWN_CA;
464 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
465 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
466 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
467 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
468 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
469 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
470 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
471 case X509_V_ERR_CERT_NOT_YET_VALID:
472 case X509_V_ERR_CRL_NOT_YET_VALID:
473 al=SSL_AD_BAD_CERTIFICATE;
475 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
476 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
477 al=SSL_AD_DECRYPT_ERROR;
479 case X509_V_ERR_CERT_HAS_EXPIRED:
480 case X509_V_ERR_CRL_HAS_EXPIRED:
481 al=SSL_AD_CERTIFICATE_EXPIRED;
483 case X509_V_ERR_CERT_REVOKED:
484 al=SSL_AD_CERTIFICATE_REVOKED;
486 case X509_V_ERR_OUT_OF_MEM:
487 al=SSL_AD_INTERNAL_ERROR;
489 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
490 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
491 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
492 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
493 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
494 al=SSL_AD_UNKNOWN_CA;
496 case X509_V_ERR_APPLICATION_VERIFICATION:
497 al=SSL_AD_HANDSHAKE_FAILURE;
500 al=SSL_AD_CERTIFICATE_UNKNOWN;
506 int ssl3_setup_buffers(SSL *s)
511 if (s->s3->rbuf.buf == NULL)
513 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
514 extra=SSL3_RT_MAX_EXTRA;
517 if ((p=Malloc(SSL3_RT_MAX_PACKET_SIZE+extra))
523 if (s->s3->wbuf.buf == NULL)
525 if ((p=Malloc(SSL3_RT_MAX_PACKET_SIZE))
530 s->packet= &(s->s3->rbuf.buf[0]);
533 SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);