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.]
66 /* SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_PEER_ERROR_NO_CIPHER);
67 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_PEER_ERROR_NO_CERTIFICATE);
68 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_PEER_ERROR_CERTIFICATE);
69 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE);
70 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_UNKNOWN_REMOTE_ERROR_TYPE);
71 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE);
72 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_BAD_RECORD_MAC);
73 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_DECOMPRESSION_FAILURE);
74 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE);
75 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_NO_CERTIFICATE);
76 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_BAD_CERTIFICATE);
77 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_UNSUPPORTED_CERTIFICATE);
78 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_CERTIFICATE_REVOKED);
79 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_CERTIFICATE_EXPIRED);
80 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN);
81 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER);
82 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_DECRYPTION_FAILED);
83 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_RECORD_OVERFLOW);
84 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_UNKNOWN_CA);
85 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_ACCESS_DENIED);
86 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_DECODE_ERROR);
87 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_DECRYPT_ERROR);
88 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_EXPORT_RESTRICION);
89 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_PROTOCOL_VERSION);
90 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY);
91 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_INTERNAL_ERROR);
92 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_USER_CANCLED);
93 * SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_TLSV1_ALERT_NO_RENEGOTIATION);
97 static int do_ssl3_write(SSL *s, int type, char *buf, unsigned int len);
98 static int ssl3_write_pending(SSL *s, int type, char *buf, unsigned int len);
99 static int ssl3_get_record(SSL *s);
100 static int do_compress(SSL *ssl);
101 static int do_uncompress(SSL *ssl);
102 static int do_change_cipher_spec(SSL *ssl);
104 static int do_ssl3_write();
105 static int ssl3_write_pending();
106 static int ssl3_get_record();
107 static int do_compress();
108 static int do_uncompress();
109 static int do_change_cipher_spec();
112 static int ssl3_read_n(s,n,max,extend)
120 /* if there is stuff still in the buffer from a previous read,
121 * and there is more than we want, take some. */
122 if (s->s3->rbuf.left >= (int)n)
128 s->packet= &(s->s3->rbuf.buf[s->s3->rbuf.offset]);
132 s->s3->rbuf.offset+=n;
136 /* else we need to read more data */
137 if (!s->read_ahead) max=n;
138 if (max > SSL3_RT_MAX_PACKET_SIZE)
139 max=SSL3_RT_MAX_PACKET_SIZE;
141 /* First check if there is some left or we want to extend */
143 if ( (s->s3->rbuf.left != 0) ||
144 ((s->packet_length != 0) && extend))
146 newb=s->s3->rbuf.left;
149 /* Copy bytes back to the front of the buffer
150 * Take the bytes already pointed to by 'packet'
151 * and take the extra ones on the end. */
152 off=s->packet_length;
153 if (s->packet != s->s3->rbuf.buf)
154 memcpy(s->s3->rbuf.buf,s->packet,newb+off);
156 else if (s->s3->rbuf.offset != 0)
157 { /* so the data is not at the start of the buffer */
158 memcpy(s->s3->rbuf.buf,
159 &(s->s3->rbuf.buf[s->s3->rbuf.offset]),newb);
160 s->s3->rbuf.offset=0;
168 /* So we now have 'newb' bytes at the front of
169 * s->s3->rbuf.buf and need to read some more in on the end
170 * We start reading into the buffer at 's->s3->rbuf.offset'
172 s->packet=s->s3->rbuf.buf;
179 s->rwstate=SSL_READING;
181 (char *)&(s->s3->rbuf.buf[off+newb]),
186 SSLerr(SSL_F_SSL3_READ_N,SSL_R_READ_BIO_NOT_SET);
192 s->s3->rbuf.left+=newb;
198 /* record used data read */
201 s->s3->rbuf.offset=n+off;
202 s->s3->rbuf.left=newb-n;
206 s->s3->rbuf.offset=0;
217 /* Call this to get a new input record.
218 * It will return <= 0 if more data is needed, normally due to an error
219 * or non-blocking IO.
220 * When it finishes, one packet has been decoded and can be found in
221 * ssl->s3->rrec.type - is the type of record
222 * ssl->s3->rrec.data, - data
223 * ssl->s3->rrec.length, - number of bytes
225 static int ssl3_get_record(s)
228 int ssl_major,ssl_minor,al;
234 unsigned char md[EVP_MAX_MD_SIZE];
236 unsigned int mac_size;
243 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
244 extra=SSL3_RT_MAX_EXTRA;
249 /* check if we have the header */
250 if ( (s->rstate != SSL_ST_READ_BODY) ||
251 (s->packet_length < SSL3_RT_HEADER_LENGTH))
253 n=ssl3_read_n(s,SSL3_RT_HEADER_LENGTH,
254 SSL3_RT_MAX_PACKET_SIZE,0);
255 if (n <= 0) return(n); /* error or non-blocking */
256 s->rstate=SSL_ST_READ_BODY;
260 /* Pull apart the header into the SSL3_RECORD */
264 version=(ssl_major<<8)|ssl_minor;
267 /* Lets check version */
274 if (version != s->version)
276 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
277 /* Send back error using their
278 * version number :-) */
280 al=SSL_AD_PROTOCOL_VERSION;
285 if ((version>>8) != SSL3_VERSION_MAJOR)
287 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
292 (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
294 al=SSL_AD_RECORD_OVERFLOW;
295 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PACKET_LENGTH_TOO_LONG);
299 s->rstate=SSL_ST_READ_BODY;
302 /* get and decode the data */
303 if (s->rstate == SSL_ST_READ_BODY)
305 if (rr->length > (s->packet_length-SSL3_RT_HEADER_LENGTH))
308 /*-(s->packet_length-SSL3_RT_HEADER_LENGTH); */
309 n=ssl3_read_n(s,i,i,1);
310 if (n <= 0) return(n); /* error or non-blocking io */
312 s->rstate=SSL_ST_READ_HEADER;
315 /* At this point, we have the data in s->packet and there should be
316 * s->packet_length bytes, we must not 'overrun' this buffer :-)
317 * One of the following functions will copy the data from the
318 * s->packet buffer */
320 rr->input= &(s->packet[SSL3_RT_HEADER_LENGTH]);
322 /* ok, we can now read from 's->packet' data into 'rr'
323 * rr->input points at rr->length bytes, which
324 * need to be copied into rr->data by either
325 * the decryption or by the decompression
326 * When the data is 'copied' into the rr->data buffer,
327 * rr->input will be pointed at the new buffer */
329 /* Set the state for the following operations */
330 s->rstate=SSL_ST_READ_HEADER;
332 /* We now have - encrypted [ MAC [ compressed [ plain ] ] ]
333 * rr->length bytes of encrypted compressed stuff. */
335 /* check is not needed I belive */
336 if (rr->length > (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
338 al=SSL_AD_RECORD_OVERFLOW;
339 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
343 /* decrypt in place in 'rr->input' */
346 if (!s->method->ssl3_enc->enc(s,0))
348 al=SSL_AD_DECRYPT_ERROR;
352 printf("dec %d\n",rr->length);
353 { unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); }
356 /* r->length is now the compressed data plus mac */
357 if ( (sess == NULL) ||
358 (s->enc_read_ctx == NULL) ||
359 (s->read_hash == NULL))
364 mac_size=EVP_MD_size(s->read_hash);
366 if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra+mac_size)
368 al=SSL_AD_RECORD_OVERFLOW;
369 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PRE_MAC_LENGTH_TOO_LONG);
372 /* check MAC for rr->input' */
373 if (rr->length < mac_size)
375 al=SSL_AD_DECODE_ERROR;
376 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT);
379 rr->length-=mac_size;
380 i=s->method->ssl3_enc->mac(s,md,0);
381 if (memcmp(md,&(rr->data[rr->length]),mac_size) != 0)
383 al=SSL_AD_BAD_RECORD_MAC;
384 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_MAC_DECODE);
390 /* r->length is now just compressed */
391 if (s->expand != NULL)
394 (unsigned int)SSL3_RT_MAX_COMPRESSED_LENGTH+extra)
396 al=SSL_AD_RECORD_OVERFLOW;
397 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG);
400 if (!do_uncompress(s))
402 al=SSL_AD_DECOMPRESSION_FAILURE;
403 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION);
408 if (rr->length > (unsigned int)SSL3_RT_MAX_PLAIN_LENGTH+extra)
410 al=SSL_AD_RECORD_OVERFLOW;
411 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG);
416 /* So at this point the following is true
417 * ssl->s3->rrec.type is the type of record
418 * ssl->s3->rrec.length == number of bytes in record
419 * ssl->s3->rrec.off == offset to first valid byte
420 * ssl->s3->rrec.data == where to take bytes from, increment
424 /* we have pulled in a full packet so zero things */
427 /* just read a 0 length packet */
428 if (rr->length == 0) goto again;
432 ssl3_send_alert(s,SSL3_AL_FATAL,al);
437 static int do_uncompress(ssl)
443 rr= &(ssl->s3->rrec);
444 i=COMP_expand_block(ssl->expand,rr->comp,
445 SSL3_RT_MAX_PLAIN_LENGTH,rr->data,(int)rr->length);
455 static int do_compress(ssl)
461 wr= &(ssl->s3->wrec);
462 i=COMP_compress_block(ssl->compress,wr->data,
463 SSL3_RT_MAX_COMPRESSED_LENGTH,
464 wr->input,(int)wr->length);
474 /* Call this to write data
475 * It will return <= 0 if not all data has been sent or non-blocking IO.
477 int ssl3_write_bytes(s,type,buf,len)
483 unsigned int tot,n,nw;
486 s->rwstate=SSL_NOTHING;
490 if (SSL_in_init(s) && !s->in_handshake)
492 i=s->handshake_func(s);
493 if (i < 0) return(i);
496 SSLerr(SSL_F_SSL3_WRITE_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
504 if (n > SSL3_RT_MAX_PLAIN_LENGTH)
505 nw=SSL3_RT_MAX_PLAIN_LENGTH;
509 i=do_ssl3_write(s,type,&(buf[tot]),nw);
516 if (type == SSL3_RT_HANDSHAKE)
517 ssl3_finish_mac(s,(unsigned char *)&(buf[tot]),i);
519 if (i == (int)n) return(tot+i);
526 static int do_ssl3_write(s,type,buf,len)
532 unsigned char *p,*plen;
533 int i,mac_size,clear=0;
538 /* first check is there is a SSL3_RECORD still being written
539 * out. This will happen with non blocking IO */
540 if (s->s3->wbuf.left != 0)
541 return(ssl3_write_pending(s,type,buf,len));
543 /* If we have an alert to send, lets send it */
544 if (s->s3->alert_dispatch)
546 i=ssl3_dispatch_alert(s);
549 /* if it went, fall through and send more stuff */
552 if (len <= 0) return(len);
558 if ( (sess == NULL) ||
559 (s->enc_write_ctx == NULL) ||
560 (s->write_hash == NULL))
566 mac_size=EVP_MD_size(s->write_hash);
570 /* write the header */
574 *(p++)=(s->version>>8);
575 *(p++)=s->version&0xff;
577 /* record where we are to write out packet length */
581 /* lets setup the record stuff. */
584 wr->input=(unsigned char *)buf;
586 /* we now 'read' from wr->input, wr->length bytes into
589 /* first we compress */
590 if (s->compress != NULL)
594 SSLerr(SSL_F_DO_SSL3_WRITE,SSL_R_COMPRESSION_FAILURE);
600 memcpy(wr->data,wr->input,wr->length);
604 /* we should still have the output to wr->data and the input
605 * from wr->input. Length should be wr->length.
606 * wr->data still points in the wb->buf */
610 s->method->ssl3_enc->mac(s,&(p[wr->length]),1);
611 wr->length+=mac_size;
616 /* ssl3_enc can only have an error on read */
617 s->method->ssl3_enc->enc(s,1);
619 /* record length after mac and block padding */
620 s2n(wr->length,plen);
622 /* we should now have
623 * wr->data pointing to the encrypted data, which is
625 wr->type=type; /* not needed but helps for debugging */
626 wr->length+=SSL3_RT_HEADER_LENGTH;
628 /* Now lets setup wb */
632 s->s3->wpend_tot=len;
633 s->s3->wpend_buf=buf;
634 s->s3->wpend_type=type;
635 s->s3->wpend_ret=len;
637 /* we now just need to write the buffer */
638 return(ssl3_write_pending(s,type,buf,len));
643 /* if s->s3->wbuf.left != 0, we need to call this */
644 static int ssl3_write_pending(s,type,buf,len)
653 if ((s->s3->wpend_tot > (int)len) || (s->s3->wpend_buf != buf)
654 || (s->s3->wpend_type != type))
656 SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);
665 s->rwstate=SSL_WRITING;
667 (char *)&(s->s3->wbuf.buf[s->s3->wbuf.offset]),
668 (unsigned int)s->s3->wbuf.left);
672 SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BIO_NOT_SET);
675 if (i == s->s3->wbuf.left)
678 s->rwstate=SSL_NOTHING;
679 return(s->s3->wpend_ret);
683 s->s3->wbuf.offset+=i;
688 int ssl3_read_bytes(s,type,buf,len)
699 if (s->s3->rbuf.buf == NULL) /* Not initialize yet */
700 if (!ssl3_setup_buffers(s))
703 if (!s->in_handshake && SSL_in_init(s))
705 i=s->handshake_func(s);
706 if (i < 0) return(i);
709 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
714 s->rwstate=SSL_NOTHING;
716 /* s->s3->rrec.type - is the type of record
717 * s->s3->rrec.data, - data
718 * s->s3->rrec.off, - ofset into 'data' for next read
719 * s->s3->rrec.length, - number of bytes. */
723 if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY))
725 ret=ssl3_get_record(s);
726 if (ret <= 0) return(ret);
729 /* we now have a packet which can be read and processed */
731 if (s->s3->change_cipher_spec && (rr->type != SSL3_RT_HANDSHAKE))
733 al=SSL_AD_UNEXPECTED_MESSAGE;
734 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
738 /* If the other end has shutdown, throw anything we read away */
739 if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
742 s->rwstate=SSL_NOTHING;
746 /* Check for an incoming 'Client Request' message */
747 if ((rr->type == SSL3_RT_HANDSHAKE) && (rr->length == 4) &&
748 (rr->data[0] == SSL3_MT_CLIENT_REQUEST) &&
749 (s->session != NULL) && (s->session->cipher != NULL))
751 if ((rr->data[1] != 0) || (rr->data[2] != 0) ||
754 al=SSL_AD_DECODE_ERROR;
755 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CLIENT_REQUEST);
759 if (SSL_is_init_finished(s) &&
760 !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
764 if (ssl3_renegotiate_check(s))
766 n=s->handshake_func(s);
767 if (n < 0) return(n);
770 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
776 /* ZZZ */ goto start;
779 /* if it is not the type we want, or we have shutdown and want
780 * the peer shutdown */
781 if ((rr->type != type) || (s->shutdown & SSL_SENT_SHUTDOWN))
783 if (rr->type == SSL3_RT_ALERT)
785 if ((rr->length != 2) || (rr->off != 0))
787 al=SSL_AD_DECODE_ERROR;
788 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_ALERT_RECORD);
795 /* clear from buffer */
798 if (s->info_callback != NULL)
800 else if (s->ctx->info_callback != NULL)
801 cb=s->ctx->info_callback;
806 cb(s,SSL_CB_READ_ALERT,j);
812 if (n == SSL_AD_CLOSE_NOTIFY)
814 s->shutdown|=SSL_RECEIVED_SHUTDOWN;
822 s->rwstate=SSL_NOTHING;
823 s->s3->fatal_alert=n;
824 SSLerr(SSL_F_SSL3_READ_BYTES,
825 SSL_AD_REASON_OFFSET+n);
827 ERR_add_error_data(2,"SSL alert number ",tmp);
828 s->shutdown|=SSL_RECEIVED_SHUTDOWN;
829 SSL_CTX_remove_session(s->ctx,s->session);
834 al=SSL_AD_ILLEGAL_PARAMETER;
835 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE);
843 if (s->shutdown & SSL_SENT_SHUTDOWN)
845 s->rwstate=SSL_NOTHING;
850 if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
852 if ( (rr->length != 1) || (rr->off != 0) ||
853 (rr->data[0] != SSL3_MT_CCS))
855 i=SSL_AD_ILLEGAL_PARAMETER;
856 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
861 s->s3->change_cipher_spec=1;
862 if (!do_change_cipher_spec(s))
868 /* else we have a handshake */
869 if ((rr->type == SSL3_RT_HANDSHAKE) &&
872 if (((s->state&SSL_ST_MASK) == SSL_ST_OK) &&
873 !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS))
875 s->state=SSL_ST_BEFORE;
878 n=s->handshake_func(s);
879 if (n < 0) return(n);
882 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
886 /* In the case where we try to read application data
887 * the first time, but we trigger an SSL handshake, we
888 * return -1 with the retry option set. I do this
889 * otherwise renegotiation can cause nasty problems
890 * in the non-blocking world */
892 s->rwstate=SSL_READING;
894 BIO_clear_retry_flags(bio);
895 BIO_set_retry_read(bio);
903 /* TLS just ignores unknown message types */
904 if (s->version == TLS1_VERSION)
909 case SSL3_RT_CHANGE_CIPHER_SPEC:
911 case SSL3_RT_HANDSHAKE:
912 al=SSL_AD_UNEXPECTED_MESSAGE;
913 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
915 case SSL3_RT_APPLICATION_DATA:
916 /* At this point, we were expecting something else,
917 * but have application data. What we do is set the
918 * error, and return -1. On the way out, if the
919 * library was running inside ssl3_read() and it makes
920 * sense to read application data at this point, we
921 * will indulge it. This will mostly happen during
922 * session renegotiation.
924 if (s->s3->in_read_app_data &&
925 (s->s3->total_renegotiations != 0) &&
927 (s->state & SSL_ST_CONNECT) &&
928 (s->state >= SSL3_ST_CW_CLNT_HELLO_A) &&
929 (s->state <= SSL3_ST_CR_SRVR_HELLO_A)
931 (s->state & SSL_ST_ACCEPT) &&
932 (s->state <= SSL3_ST_SW_HELLO_REQ_A) &&
933 (s->state >= SSL3_ST_SR_CLNT_HELLO_A)
937 s->s3->in_read_app_data=0;
942 al=SSL_AD_UNEXPECTED_MESSAGE;
943 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
949 /* make sure that we are not getting application data when we
950 * are doing a handshake for the first time */
951 if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
952 (s->enc_read_ctx == NULL))
954 al=SSL_AD_UNEXPECTED_MESSAGE;
955 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE);
959 if (len <= 0) return(len);
961 if ((unsigned int)len > rr->length)
966 memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
971 s->rstate=SSL_ST_READ_HEADER;
975 if (type == SSL3_RT_HANDSHAKE)
976 ssl3_finish_mac(s,(unsigned char *)buf,n);
979 ssl3_send_alert(s,SSL3_AL_FATAL,al);
984 static int do_change_cipher_spec(s)
988 unsigned char *sender;
991 if (s->state & SSL_ST_ACCEPT)
992 i=SSL3_CHANGE_CIPHER_SERVER_READ;
994 i=SSL3_CHANGE_CIPHER_CLIENT_READ;
996 if (s->s3->tmp.key_block == NULL)
998 s->session->cipher=s->s3->tmp.new_cipher;
999 if (!s->method->ssl3_enc->setup_key_block(s)) return(0);
1002 if (!s->method->ssl3_enc->change_cipher_state(s,i))
1005 /* we have to record the message digest at
1006 * this point so we can get it before we read
1007 * the finished message */
1008 if (s->state & SSL_ST_CONNECT)
1010 sender=s->method->ssl3_enc->server_finished;
1011 slen=s->method->ssl3_enc->server_finished_len;
1015 sender=s->method->ssl3_enc->client_finished;
1016 slen=s->method->ssl3_enc->client_finished_len;
1019 s->method->ssl3_enc->final_finish_mac(s,
1020 &(s->s3->finish_dgst1),
1021 &(s->s3->finish_dgst2),
1022 sender,slen,&(s->s3->tmp.finish_md[0]));
1027 int ssl3_do_write(s,type)
1033 ret=ssl3_write_bytes(s,type,(char *)
1034 &(s->init_buf->data[s->init_off]),s->init_num);
1035 if (ret == s->init_num)
1037 if (ret < 0) return(-1);
1043 void ssl3_send_alert(s,level,desc)
1048 /* Map tls/ssl alert value to correct one */
1049 desc=s->method->ssl3_enc->alert_value(desc);
1050 if (desc < 0) return;
1051 /* If a fatal one, remove from cache */
1052 if ((level == 2) && (s->session != NULL))
1053 SSL_CTX_remove_session(s->ctx,s->session);
1055 s->s3->alert_dispatch=1;
1056 s->s3->send_alert[0]=level;
1057 s->s3->send_alert[1]=desc;
1058 if (s->s3->wbuf.left == 0) /* data still being written out */
1059 ssl3_dispatch_alert(s);
1060 /* else data is still being written out, we will get written
1061 * some time in the future */
1064 int ssl3_dispatch_alert(s)
1070 s->s3->alert_dispatch=0;
1071 i=do_ssl3_write(s,SSL3_RT_ALERT,&(s->s3->send_alert[0]),2);
1074 s->s3->alert_dispatch=1;
1078 /* If it is important, send it now. If the message
1079 * does not get sent due to non-blocking IO, we will
1080 * not worry too much. */
1081 if (s->s3->send_alert[0] == SSL3_AL_FATAL)
1084 if (s->info_callback != NULL)
1085 cb=s->info_callback;
1086 else if (s->ctx->info_callback != NULL)
1087 cb=s->ctx->info_callback;
1091 j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1];
1092 cb(s,SSL_CB_WRITE_ALERT,j);