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.]
62 #include <openssl/evp.h>
63 #include <openssl/buffer.h>
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, const unsigned char *buf,
99 static int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
101 static int ssl3_get_record(SSL *s);
102 static int do_compress(SSL *ssl);
103 static int do_uncompress(SSL *ssl);
104 static int do_change_cipher_spec(SSL *ssl);
106 static int do_ssl3_write();
107 static int ssl3_write_pending();
108 static int ssl3_get_record();
109 static int do_compress();
110 static int do_uncompress();
111 static int do_change_cipher_spec();
114 static int ssl3_read_n(SSL *s, int n, int max, int extend)
118 /* if there is stuff still in the buffer from a previous read,
119 * and there is more than we want, take some. */
120 if (s->s3->rbuf.left >= (int)n)
126 s->packet= &(s->s3->rbuf.buf[s->s3->rbuf.offset]);
130 s->s3->rbuf.offset+=n;
134 /* else we need to read more data */
135 if (!s->read_ahead) max=n;
136 if (max > SSL3_RT_MAX_PACKET_SIZE)
137 max=SSL3_RT_MAX_PACKET_SIZE;
139 /* First check if there is some left or we want to extend */
141 if ( (s->s3->rbuf.left != 0) ||
142 ((s->packet_length != 0) && extend))
144 newb=s->s3->rbuf.left;
147 /* Copy bytes back to the front of the buffer
148 * Take the bytes already pointed to by 'packet'
149 * and take the extra ones on the end. */
150 off=s->packet_length;
151 if (s->packet != s->s3->rbuf.buf)
152 memcpy(s->s3->rbuf.buf,s->packet,newb+off);
154 else if (s->s3->rbuf.offset != 0)
155 { /* so the data is not at the start of the buffer */
156 memcpy(s->s3->rbuf.buf,
157 &(s->s3->rbuf.buf[s->s3->rbuf.offset]),newb);
158 s->s3->rbuf.offset=0;
166 /* So we now have 'newb' bytes at the front of
167 * s->s3->rbuf.buf and need to read some more in on the end
168 * We start reading into the buffer at 's->s3->rbuf.offset'
170 s->packet=s->s3->rbuf.buf;
177 s->rwstate=SSL_READING;
179 (char *)&(s->s3->rbuf.buf[off+newb]),
184 SSLerr(SSL_F_SSL3_READ_N,SSL_R_READ_BIO_NOT_SET);
190 s->s3->rbuf.left+=newb;
196 /* record used data read */
199 s->s3->rbuf.offset=n+off;
200 s->s3->rbuf.left=newb-n;
204 s->s3->rbuf.offset=0;
215 /* Call this to get a new input record.
216 * It will return <= 0 if more data is needed, normally due to an error
217 * or non-blocking IO.
218 * When it finishes, one packet has been decoded and can be found in
219 * ssl->s3->rrec.type - is the type of record
220 * ssl->s3->rrec.data, - data
221 * ssl->s3->rrec.length, - number of bytes
223 static int ssl3_get_record(SSL *s)
225 int ssl_major,ssl_minor,al;
231 unsigned char md[EVP_MAX_MD_SIZE];
233 unsigned int mac_size;
240 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
241 extra=SSL3_RT_MAX_EXTRA;
246 /* check if we have the header */
247 if ( (s->rstate != SSL_ST_READ_BODY) ||
248 (s->packet_length < SSL3_RT_HEADER_LENGTH))
250 n=ssl3_read_n(s,SSL3_RT_HEADER_LENGTH,
251 SSL3_RT_MAX_PACKET_SIZE,0);
252 if (n <= 0) return(n); /* error or non-blocking */
253 s->rstate=SSL_ST_READ_BODY;
257 /* Pull apart the header into the SSL3_RECORD */
261 version=(ssl_major<<8)|ssl_minor;
264 /* Lets check version */
271 if (version != s->version)
273 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
274 /* Send back error using their
275 * version number :-) */
277 al=SSL_AD_PROTOCOL_VERSION;
282 if ((version>>8) != SSL3_VERSION_MAJOR)
284 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
289 (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
291 al=SSL_AD_RECORD_OVERFLOW;
292 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PACKET_LENGTH_TOO_LONG);
296 s->rstate=SSL_ST_READ_BODY;
299 /* get and decode the data */
300 if (s->rstate == SSL_ST_READ_BODY)
302 if (rr->length > (s->packet_length-SSL3_RT_HEADER_LENGTH))
305 /*-(s->packet_length-SSL3_RT_HEADER_LENGTH); */
306 n=ssl3_read_n(s,i,i,1);
307 if (n <= 0) return(n); /* error or non-blocking io */
309 s->rstate=SSL_ST_READ_HEADER;
312 /* At this point, we have the data in s->packet and there should be
313 * s->packet_length bytes, we must not 'overrun' this buffer :-)
314 * One of the following functions will copy the data from the
315 * s->packet buffer */
317 rr->input= &(s->packet[SSL3_RT_HEADER_LENGTH]);
319 /* ok, we can now read from 's->packet' data into 'rr'
320 * rr->input points at rr->length bytes, which
321 * need to be copied into rr->data by either
322 * the decryption or by the decompression
323 * When the data is 'copied' into the rr->data buffer,
324 * rr->input will be pointed at the new buffer */
326 /* Set the state for the following operations */
327 s->rstate=SSL_ST_READ_HEADER;
329 /* We now have - encrypted [ MAC [ compressed [ plain ] ] ]
330 * rr->length bytes of encrypted compressed stuff. */
332 /* check is not needed I belive */
333 if (rr->length > (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
335 al=SSL_AD_RECORD_OVERFLOW;
336 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
340 /* decrypt in place in 'rr->input' */
343 if (!s->method->ssl3_enc->enc(s,0))
345 al=SSL_AD_DECRYPT_ERROR;
349 printf("dec %d\n",rr->length);
350 { unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); }
353 /* r->length is now the compressed data plus mac */
354 if ( (sess == NULL) ||
355 (s->enc_read_ctx == NULL) ||
356 (s->read_hash == NULL))
361 mac_size=EVP_MD_size(s->read_hash);
363 if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra+mac_size)
365 al=SSL_AD_RECORD_OVERFLOW;
366 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PRE_MAC_LENGTH_TOO_LONG);
369 /* check MAC for rr->input' */
370 if (rr->length < mac_size)
372 al=SSL_AD_DECODE_ERROR;
373 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT);
376 rr->length-=mac_size;
377 i=s->method->ssl3_enc->mac(s,md,0);
378 if (memcmp(md,&(rr->data[rr->length]),mac_size) != 0)
380 al=SSL_AD_BAD_RECORD_MAC;
381 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_MAC_DECODE);
387 /* r->length is now just compressed */
388 if (s->expand != NULL)
391 (unsigned int)SSL3_RT_MAX_COMPRESSED_LENGTH+extra)
393 al=SSL_AD_RECORD_OVERFLOW;
394 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG);
397 if (!do_uncompress(s))
399 al=SSL_AD_DECOMPRESSION_FAILURE;
400 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION);
405 if (rr->length > (unsigned int)SSL3_RT_MAX_PLAIN_LENGTH+extra)
407 al=SSL_AD_RECORD_OVERFLOW;
408 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG);
413 /* So at this point the following is true
414 * ssl->s3->rrec.type is the type of record
415 * ssl->s3->rrec.length == number of bytes in record
416 * ssl->s3->rrec.off == offset to first valid byte
417 * ssl->s3->rrec.data == where to take bytes from, increment
421 /* we have pulled in a full packet so zero things */
424 /* just read a 0 length packet */
425 if (rr->length == 0) goto again;
429 ssl3_send_alert(s,SSL3_AL_FATAL,al);
434 static int do_uncompress(SSL *ssl)
439 rr= &(ssl->s3->rrec);
440 i=COMP_expand_block(ssl->expand,rr->comp,
441 SSL3_RT_MAX_PLAIN_LENGTH,rr->data,(int)rr->length);
451 static int do_compress(SSL *ssl)
456 wr= &(ssl->s3->wrec);
457 i=COMP_compress_block(ssl->compress,wr->data,
458 SSL3_RT_MAX_COMPRESSED_LENGTH,
459 wr->input,(int)wr->length);
469 /* Call this to write data
470 * It will return <= 0 if not all data has been sent or non-blocking IO.
472 int ssl3_write_bytes(SSL *s, int type, const void *_buf, int len)
474 const unsigned char *buf=_buf;
475 unsigned int tot,n,nw;
478 s->rwstate=SSL_NOTHING;
482 if (SSL_in_init(s) && !s->in_handshake)
484 i=s->handshake_func(s);
485 if (i < 0) return(i);
488 SSLerr(SSL_F_SSL3_WRITE_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
496 if (n > SSL3_RT_MAX_PLAIN_LENGTH)
497 nw=SSL3_RT_MAX_PLAIN_LENGTH;
501 i=do_ssl3_write(s,type,&(buf[tot]),nw);
508 if (type == SSL3_RT_HANDSHAKE)
509 ssl3_finish_mac(s,&(buf[tot]),i);
511 if (i == (int)n) return(tot+i);
518 static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
521 unsigned char *p,*plen;
522 int i,mac_size,clear=0;
527 /* first check is there is a SSL3_RECORD still being written
528 * out. This will happen with non blocking IO */
529 if (s->s3->wbuf.left != 0)
530 return(ssl3_write_pending(s,type,buf,len));
532 /* If we have an alert to send, lets send it */
533 if (s->s3->alert_dispatch)
535 i=ssl3_dispatch_alert(s);
538 /* if it went, fall through and send more stuff */
541 if (len <= 0) return(len);
547 if ( (sess == NULL) ||
548 (s->enc_write_ctx == NULL) ||
549 (s->write_hash == NULL))
555 mac_size=EVP_MD_size(s->write_hash);
559 /* write the header */
563 *(p++)=(s->version>>8);
564 *(p++)=s->version&0xff;
566 /* record where we are to write out packet length */
570 /* lets setup the record stuff. */
573 wr->input=(unsigned char *)buf;
575 /* we now 'read' from wr->input, wr->length bytes into
578 /* first we compress */
579 if (s->compress != NULL)
583 SSLerr(SSL_F_DO_SSL3_WRITE,SSL_R_COMPRESSION_FAILURE);
589 memcpy(wr->data,wr->input,wr->length);
593 /* we should still have the output to wr->data and the input
594 * from wr->input. Length should be wr->length.
595 * wr->data still points in the wb->buf */
599 s->method->ssl3_enc->mac(s,&(p[wr->length]),1);
600 wr->length+=mac_size;
605 /* ssl3_enc can only have an error on read */
606 s->method->ssl3_enc->enc(s,1);
608 /* record length after mac and block padding */
609 s2n(wr->length,plen);
611 /* we should now have
612 * wr->data pointing to the encrypted data, which is
614 wr->type=type; /* not needed but helps for debugging */
615 wr->length+=SSL3_RT_HEADER_LENGTH;
617 /* Now lets setup wb */
621 s->s3->wpend_tot=len;
622 s->s3->wpend_buf=buf;
623 s->s3->wpend_type=type;
624 s->s3->wpend_ret=len;
626 /* we now just need to write the buffer */
627 return(ssl3_write_pending(s,type,buf,len));
632 /* if s->s3->wbuf.left != 0, we need to call this */
633 static int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
639 if ((s->s3->wpend_tot > (int)len) || (s->s3->wpend_buf != buf)
640 || (s->s3->wpend_type != type))
642 SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);
651 s->rwstate=SSL_WRITING;
653 (char *)&(s->s3->wbuf.buf[s->s3->wbuf.offset]),
654 (unsigned int)s->s3->wbuf.left);
658 SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BIO_NOT_SET);
661 if (i == s->s3->wbuf.left)
664 s->rwstate=SSL_NOTHING;
665 return(s->s3->wpend_ret);
669 s->s3->wbuf.offset+=i;
674 int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len)
681 if (s->s3->rbuf.buf == NULL) /* Not initialize yet */
682 if (!ssl3_setup_buffers(s))
685 if (!s->in_handshake && SSL_in_init(s))
687 i=s->handshake_func(s);
688 if (i < 0) return(i);
691 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
696 s->rwstate=SSL_NOTHING;
698 /* s->s3->rrec.type - is the type of record
699 * s->s3->rrec.data, - data
700 * s->s3->rrec.off, - ofset into 'data' for next read
701 * s->s3->rrec.length, - number of bytes. */
705 if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY))
707 ret=ssl3_get_record(s);
708 if (ret <= 0) return(ret);
711 /* we now have a packet which can be read and processed */
713 if (s->s3->change_cipher_spec && (rr->type != SSL3_RT_HANDSHAKE))
715 al=SSL_AD_UNEXPECTED_MESSAGE;
716 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
720 /* If the other end has shutdown, throw anything we read away */
721 if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
724 s->rwstate=SSL_NOTHING;
728 /* Check for an incoming 'Client Request' message */
729 if ((rr->type == SSL3_RT_HANDSHAKE) && (rr->length == 4) &&
730 (rr->data[0] == SSL3_MT_CLIENT_REQUEST) &&
731 (s->session != NULL) && (s->session->cipher != NULL))
733 if ((rr->data[1] != 0) || (rr->data[2] != 0) ||
736 al=SSL_AD_DECODE_ERROR;
737 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CLIENT_REQUEST);
741 if (SSL_is_init_finished(s) &&
742 !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
746 if (ssl3_renegotiate_check(s))
748 n=s->handshake_func(s);
749 if (n < 0) return(n);
752 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
758 /* ZZZ */ goto start;
761 /* if it is not the type we want, or we have shutdown and want
762 * the peer shutdown */
763 if ((rr->type != type) || (s->shutdown & SSL_SENT_SHUTDOWN))
765 if (rr->type == SSL3_RT_ALERT)
767 if ((rr->length != 2) || (rr->off != 0))
769 al=SSL_AD_DECODE_ERROR;
770 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_ALERT_RECORD);
777 /* clear from buffer */
780 if (s->info_callback != NULL)
782 else if (s->ctx->info_callback != NULL)
783 cb=s->ctx->info_callback;
788 cb(s,SSL_CB_READ_ALERT,j);
794 if (n == SSL_AD_CLOSE_NOTIFY)
796 s->shutdown|=SSL_RECEIVED_SHUTDOWN;
804 s->rwstate=SSL_NOTHING;
805 s->s3->fatal_alert=n;
806 SSLerr(SSL_F_SSL3_READ_BYTES,
807 SSL_AD_REASON_OFFSET+n);
809 ERR_add_error_data(2,"SSL alert number ",tmp);
810 s->shutdown|=SSL_RECEIVED_SHUTDOWN;
811 SSL_CTX_remove_session(s->ctx,s->session);
816 al=SSL_AD_ILLEGAL_PARAMETER;
817 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE);
825 if (s->shutdown & SSL_SENT_SHUTDOWN)
827 s->rwstate=SSL_NOTHING;
832 if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
834 if ( (rr->length != 1) || (rr->off != 0) ||
835 (rr->data[0] != SSL3_MT_CCS))
837 i=SSL_AD_ILLEGAL_PARAMETER;
838 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
843 s->s3->change_cipher_spec=1;
844 if (!do_change_cipher_spec(s))
850 /* else we have a handshake */
851 if ((rr->type == SSL3_RT_HANDSHAKE) &&
854 if (((s->state&SSL_ST_MASK) == SSL_ST_OK) &&
855 !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS))
857 s->state=SSL_ST_BEFORE|(s->server)
862 n=s->handshake_func(s);
863 if (n < 0) return(n);
866 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
870 /* In the case where we try to read application data
871 * the first time, but we trigger an SSL handshake, we
872 * return -1 with the retry option set. I do this
873 * otherwise renegotiation can cause nasty problems
874 * in the non-blocking world */
876 s->rwstate=SSL_READING;
878 BIO_clear_retry_flags(bio);
879 BIO_set_retry_read(bio);
887 /* TLS just ignores unknown message types */
888 if (s->version == TLS1_VERSION)
893 case SSL3_RT_CHANGE_CIPHER_SPEC:
895 case SSL3_RT_HANDSHAKE:
896 al=SSL_AD_UNEXPECTED_MESSAGE;
897 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
899 case SSL3_RT_APPLICATION_DATA:
900 /* At this point, we were expecting something else,
901 * but have application data. What we do is set the
902 * error, and return -1. On the way out, if the
903 * library was running inside ssl3_read() and it makes
904 * sense to read application data at this point, we
905 * will indulge it. This will mostly happen during
906 * session renegotiation.
908 if (s->s3->in_read_app_data &&
909 (s->s3->total_renegotiations != 0) &&
911 (s->state & SSL_ST_CONNECT) &&
912 (s->state >= SSL3_ST_CW_CLNT_HELLO_A) &&
913 (s->state <= SSL3_ST_CR_SRVR_HELLO_A)
915 (s->state & SSL_ST_ACCEPT) &&
916 (s->state <= SSL3_ST_SW_HELLO_REQ_A) &&
917 (s->state >= SSL3_ST_SR_CLNT_HELLO_A)
921 s->s3->in_read_app_data=0;
926 al=SSL_AD_UNEXPECTED_MESSAGE;
927 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
933 /* make sure that we are not getting application data when we
934 * are doing a handshake for the first time */
935 if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
936 (s->enc_read_ctx == NULL))
938 al=SSL_AD_UNEXPECTED_MESSAGE;
939 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE);
943 if (len <= 0) return(len);
945 if ((unsigned int)len > rr->length)
950 memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
955 s->rstate=SSL_ST_READ_HEADER;
959 if (type == SSL3_RT_HANDSHAKE)
960 ssl3_finish_mac(s,buf,n);
963 ssl3_send_alert(s,SSL3_AL_FATAL,al);
968 static int do_change_cipher_spec(SSL *s)
971 unsigned char *sender;
974 if (s->state & SSL_ST_ACCEPT)
975 i=SSL3_CHANGE_CIPHER_SERVER_READ;
977 i=SSL3_CHANGE_CIPHER_CLIENT_READ;
979 if (s->s3->tmp.key_block == NULL)
981 s->session->cipher=s->s3->tmp.new_cipher;
982 if (!s->method->ssl3_enc->setup_key_block(s)) return(0);
985 if (!s->method->ssl3_enc->change_cipher_state(s,i))
988 /* we have to record the message digest at
989 * this point so we can get it before we read
990 * the finished message */
991 if (s->state & SSL_ST_CONNECT)
993 sender=s->method->ssl3_enc->server_finished;
994 slen=s->method->ssl3_enc->server_finished_len;
998 sender=s->method->ssl3_enc->client_finished;
999 slen=s->method->ssl3_enc->client_finished_len;
1002 s->method->ssl3_enc->final_finish_mac(s,
1003 &(s->s3->finish_dgst1),
1004 &(s->s3->finish_dgst2),
1005 sender,slen,&(s->s3->tmp.finish_md[0]));
1010 int ssl3_do_write(SSL *s, int type)
1014 ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
1016 if (ret == s->init_num)
1018 if (ret < 0) return(-1);
1024 void ssl3_send_alert(SSL *s, int level, int desc)
1026 /* Map tls/ssl alert value to correct one */
1027 desc=s->method->ssl3_enc->alert_value(desc);
1028 if (desc < 0) return;
1029 /* If a fatal one, remove from cache */
1030 if ((level == 2) && (s->session != NULL))
1031 SSL_CTX_remove_session(s->ctx,s->session);
1033 s->s3->alert_dispatch=1;
1034 s->s3->send_alert[0]=level;
1035 s->s3->send_alert[1]=desc;
1036 if (s->s3->wbuf.left == 0) /* data still being written out */
1037 ssl3_dispatch_alert(s);
1038 /* else data is still being written out, we will get written
1039 * some time in the future */
1042 int ssl3_dispatch_alert(SSL *s)
1047 s->s3->alert_dispatch=0;
1048 i=do_ssl3_write(s,SSL3_RT_ALERT,&s->s3->send_alert[0],2);
1051 s->s3->alert_dispatch=1;
1055 /* If it is important, send it now. If the message
1056 * does not get sent due to non-blocking IO, we will
1057 * not worry too much. */
1058 if (s->s3->send_alert[0] == SSL3_AL_FATAL)
1061 if (s->info_callback != NULL)
1062 cb=s->info_callback;
1063 else if (s->ctx->info_callback != NULL)
1064 cb=s->ctx->info_callback;
1068 j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1];
1069 cb(s,SSL_CB_WRITE_ALERT,j);