2 /* Copyright (C) 1995-1997 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);
85 static int do_ssl3_write(SSL *s, int type, char *buf, unsigned int len);
86 static int ssl3_write_pending(SSL *s, int type, char *buf, unsigned int len);
87 static int ssl3_get_record(SSL *s);
88 static int do_compress(SSL *ssl);
89 static int do_uncompress(SSL *ssl);
91 static int do_ssl3_write();
92 static int ssl3_write_pending();
93 static int ssl3_get_record();
94 static int do_compress();
95 static int do_uncompress();
98 static int ssl3_read_n(s,n,max,extend)
106 /* if there is stuff still in the buffer from a previous read,
107 * and there is more than we want, take some. */
108 if (s->s3->rbuf.left >= (int)n)
114 s->packet= &(s->s3->rbuf.buf[s->s3->rbuf.offset]);
118 s->s3->rbuf.offset+=n;
122 /* else we need to read more data */
123 if (!s->read_ahead) max=n;
124 if (max > SSL3_RT_MAX_PACKET_SIZE)
125 max=SSL3_RT_MAX_PACKET_SIZE;
127 /* First check if there is some left or we want to extend */
129 if ( (s->s3->rbuf.left != 0) ||
130 ((s->packet_length != 0) && extend))
132 newb=s->s3->rbuf.left;
135 /* Copy bytes back to the front of the buffer
136 * Take the bytes already pointed to by 'packet'
137 * and take the extra ones on the end. */
138 off=s->packet_length;
139 if (s->packet != s->s3->rbuf.buf)
140 memcpy(s->s3->rbuf.buf,s->packet,newb+off);
142 else if (s->s3->rbuf.offset != 0)
143 { /* so the data is not at the start of the buffer */
144 memcpy(s->s3->rbuf.buf,
145 &(s->s3->rbuf.buf[s->s3->rbuf.offset]),newb);
146 s->s3->rbuf.offset=0;
154 /* So we now have 'newb' bytes at the front of
155 * s->s3->rbuf.buf and need to read some more in on the end
156 * We start reading into the buffer at 's->s3->rbuf.offset'
158 s->packet=s->s3->rbuf.buf;
165 s->rwstate=SSL_READING;
167 (char *)&(s->s3->rbuf.buf[off+newb]),
172 SSLerr(SSL_F_SSL3_READ_N,SSL_R_READ_BIO_NOT_SET);
178 s->s3->rbuf.left+=newb;
184 /* record used data read */
187 s->s3->rbuf.offset=n+off;
188 s->s3->rbuf.left=newb-n;
192 s->s3->rbuf.offset=0;
203 /* Call this to get a new input record.
204 * It will return <= 0 if more data is needed, normally due to an error
205 * or non-blocking IO.
206 * When it finishes, one packet has been decoded and can be found in
207 * ssl->s3->rrec.type - is the type of record
208 * ssl->s3->rrec.data, - data
209 * ssl->s3->rrec.length, - number of bytes
211 static int ssl3_get_record(s)
214 int ssl_major,ssl_minor,al;
220 unsigned char md[EVP_MAX_MD_SIZE];
222 unsigned int mac_size;
229 if (s->ctx->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
230 extra=SSL3_RT_MAX_EXTRA;
235 /* check if we have the header */
236 if ( (s->rstate != SSL_ST_READ_BODY) ||
237 (s->packet_length < SSL3_RT_HEADER_LENGTH))
239 n=ssl3_read_n(s,SSL3_RT_HEADER_LENGTH,
240 SSL3_RT_MAX_PACKET_SIZE,0);
241 if (n <= 0) return(n); /* error or non-blocking */
242 s->rstate=SSL_ST_READ_BODY;
246 /* Pull apart the header into the SSL3_RECORD */
250 version=(ssl_major<<8)|ssl_minor;
253 /* Lets check version */
260 if ( (ssl_major != SSL3_VERSION_MAJOR) ||
261 (ssl_minor != SSL3_VERSION_MINOR))
263 al=SSL3_AD_ILLEGAL_PARAMETER;
264 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
269 if (s->version != SSL3_VERSION_MAJOR)
271 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_INTERNAL_ERROR);
276 (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
278 al=SSL3_AD_ILLEGAL_PARAMETER;
279 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PACKET_LENGTH_TOO_LONG);
283 s->rstate=SSL_ST_READ_BODY;
286 /* get and decode the data */
287 if (s->rstate == SSL_ST_READ_BODY)
289 if (rr->length > (s->packet_length-SSL3_RT_HEADER_LENGTH))
292 /*-(s->packet_length-SSL3_RT_HEADER_LENGTH); */
293 n=ssl3_read_n(s,i,i,1);
294 if (n <= 0) return(n); /* error or non-blocking io */
296 s->rstate=SSL_ST_READ_HEADER;
299 /* At this point, we have the data in s->packet and there should be
300 * s->packet_length bytes, we must not 'overrun' this buffer :-)
301 * One of the following functions will copy the data from the
302 * s->packet buffer */
304 rr->input= &(s->packet[SSL3_RT_HEADER_LENGTH]);
306 /* ok, we can now read from 's->packet' data into 'rr'
307 * rr->input points at rr->length bytes, which
308 * need to be copied into rr->data by either
309 * the decryption or by the decompression
310 * When the data is 'copied' into the rr->data buffer,
311 * rr->input will be pointed at the new buffer */
313 /* Set the state for the following operations */
314 s->rstate=SSL_ST_READ_HEADER;
316 /* We now have - encrypted [ MAC [ compressed [ plain ] ] ]
317 * rr->length bytes of encrypted compressed stuff. */
319 /* check is not needed I belive */
320 if (rr->length > (unsigned int)SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
322 al=SSL3_AD_ILLEGAL_PARAMETER;
323 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
327 /* decrypt in place in 'rr->input' */
332 al=SSL3_AD_ILLEGAL_PARAMETER;
336 /* r->length is now the compressed data plus mac */
337 if ( (sess == NULL) ||
338 (s->enc_read_ctx == NULL) ||
339 (s->read_hash == NULL))
344 mac_size=EVP_MD_size(s->read_hash);
346 if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra+mac_size)
348 al=SSL3_AD_ILLEGAL_PARAMETER;
349 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PRE_MAC_LENGTH_TOO_LONG);
352 /* check MAC for rr->input' */
353 if (rr->length < mac_size)
355 al=SSL3_AD_ILLEGAL_PARAMETER;
356 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT);
359 rr->length-=mac_size;
361 if (memcmp(md,&(rr->data[rr->length]),mac_size) != 0)
363 al=SSL3_AD_BAD_RECORD_MAC;
364 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_MAC_DECODE);
365 ret=SSL_RWERR_BAD_MAC_DECODE;
370 /* r->length is now just compressed */
371 if ((sess != NULL) && (sess->read_compression != NULL))
374 (unsigned int)SSL3_RT_MAX_COMPRESSED_LENGTH+extra)
376 al=SSL3_AD_ILLEGAL_PARAMETER;
377 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG);
380 if (!do_uncompress(s))
382 al=SSL3_AD_DECOMPRESSION_FAILURE;
383 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION);
388 if (rr->length > (unsigned int)SSL3_RT_MAX_PLAIN_LENGTH+extra)
390 al=SSL3_AD_DECOMPRESSION_FAILURE;
391 SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG);
396 /* So at this point the following is true
397 * ssl->s3->rrec.type is the type of record
398 * ssl->s3->rrec.length == number of bytes in record
399 * ssl->s3->rrec.off == offset to first valid byte
400 * ssl->s3->rrec.data == where to take bytes from, increment
404 /* we have pulled in a full packet so zero things */
407 /* just read a 0 length packet */
408 if (rr->length == 0) goto again;
412 ssl3_send_alert(s,SSL3_AL_FATAL,al);
417 static int do_uncompress(ssl)
423 static int do_compress(ssl)
429 /* Call this write a data
430 * It will return <= 0 if not all data has been sent or non-blocking IO.
432 int ssl3_write_bytes(s,type,buf,len)
438 unsigned int tot,n,nw;
441 s->rwstate=SSL_NOTHING;
445 if (SSL_in_init(s) && !s->in_handshake)
447 i=s->handshake_func(s);
448 if (i < 0) return(i);
451 SSLerr(SSL_F_SSL3_WRITE_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
459 if (n > SSL3_RT_MAX_PLAIN_LENGTH)
460 nw=SSL3_RT_MAX_PLAIN_LENGTH;
464 i=do_ssl3_write(s,type,&(buf[tot]),nw);
471 if (type == SSL3_RT_HANDSHAKE)
472 ssl3_finish_mac(s,(unsigned char *)&(buf[tot]),i);
474 if (i == (int)n) return(tot+i);
481 static int do_ssl3_write(s,type,buf,len)
487 unsigned char *p,*plen;
488 int i,mac_size,clear=0;
493 /* first check is there is a SSL3_RECORD still being written
494 * out. This will happen with non blocking IO */
495 if (s->s3->wbuf.left != 0)
496 return(ssl3_write_pending(s,type,buf,len));
498 /* If we have an alert to send, lets send it */
499 if (s->s3->alert_dispatch)
501 i=ssl3_dispatch_alert(s);
504 /* if it went, fall through and send more stuff */
507 if (len <= 0) return(len);
513 if ( (sess == NULL) ||
514 (s->enc_write_ctx == NULL) ||
515 (s->write_hash == NULL))
521 mac_size=EVP_MD_size(s->write_hash);
525 /* write the header */
529 *(p++)=SSL3_VERSION_MAJOR;
530 *(p++)=SSL3_VERSION_MINOR;
532 /* record where we are to write out packet length */
536 /* lets setup the record stuff. */
539 wr->input=(unsigned char *)buf;
541 /* we now 'read' from wr->input, wr->length bytes into
544 /* first we compress */
545 if ((sess != NULL) && (sess->write_compression != NULL))
549 SSLerr(SSL_F_DO_SSL3_WRITE,SSL_R_COMPRESSION_FAILURE);
555 memcpy(wr->data,wr->input,wr->length);
559 /* we should still have the output to wr->data and the input
560 * from wr->input. Length should be wr->length.
561 * wr->data still points in the wb->buf */
565 ssl3_mac(s,&(p[wr->length]),1);
566 wr->length+=mac_size;
571 /* ssl3_enc can only have an error on read */
574 /* record length after mac and block padding */
575 s2n(wr->length,plen);
577 /* we should now have
578 * wr->data pointing to the encrypted data, which is
580 wr->type=type; /* not needed but helps for debugging */
581 wr->length+=SSL3_RT_HEADER_LENGTH;
583 /* Now lets setup wb */
587 s->s3->wpend_tot=len;
588 s->s3->wpend_buf=buf;
589 s->s3->wpend_type=type;
590 s->s3->wpend_ret=len;
592 /* we now just need to write the buffer */
593 return(ssl3_write_pending(s,type,buf,len));
598 /* if s->s3->wbuf.left != 0, we need to call this */
599 static int ssl3_write_pending(s,type,buf,len)
607 if ((s->s3->wpend_tot != (int)len) || (s->s3->wpend_buf != buf)
608 || (s->s3->wpend_type != type))
610 SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);
611 return(SSL_RWERR_BAD_WRITE_RETRY);
619 s->rwstate=SSL_WRITING;
621 (char *)&(s->s3->wbuf.buf[s->s3->wbuf.offset]),
622 (unsigned int)s->s3->wbuf.left);
626 SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BIO_NOT_SET);
629 if (i == s->s3->wbuf.left)
632 s->rwstate=SSL_NOTHING;
633 return(s->s3->wpend_ret);
637 s->s3->wbuf.offset+=i;
642 int ssl3_read_bytes(s,type,buf,len)
650 unsigned char *sender;
653 if (s->s3->rbuf.buf == NULL) /* Not initalised yet */
654 if (!ssl3_setup_buffers(s))
657 if (!s->in_handshake && SSL_in_before(s))
659 i=s->handshake_func(s);
660 if (i < 0) return(i);
663 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
668 s->rwstate=SSL_NOTHING;
670 /* s->s3->rrec.type - is the type of record
671 * s->s3->rrec.data, - data
672 * s->s3->rrec.off, - ofset into 'data' for next read
673 * s->s3->rrec.length, - number of bytes. */
677 if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY))
679 ret=ssl3_get_record(s);
680 if (ret <= 0) return(ret);
683 /* we now have a packet which can be read and processed */
685 if (s->s3->change_cipher_spec && (rr->type != SSL3_RT_HANDSHAKE))
687 al=SSL3_AD_UNEXPECTED_MESSAGE;
688 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
692 /* If the other end has shutdown, throw anything we read away */
693 if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
696 s->rwstate=SSL_NOTHING;
700 /* Check for an incoming 'Client Request' message */
701 if ((rr->type == SSL3_RT_HANDSHAKE) && (rr->length == 4) &&
702 (rr->data[0] == SSL3_MT_CLIENT_REQUEST) &&
703 (s->session != NULL) && (s->session->cipher != NULL))
705 if ((rr->data[1] != 0) || (rr->data[2] != 0) ||
708 al=SSL3_AD_ILLEGAL_PARAMETER;
709 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CLIENT_REQUEST);
713 if (SSL_is_init_finished(s) &&
714 !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS))
717 n=s->handshake_func(s);
718 if (n < 0) return(n);
721 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
726 /* ZZZ */ goto start;
729 /* if it is not the type we want, or we have shutdown and want
730 * the peer shutdown */
731 if ((rr->type != type) || (s->shutdown & SSL_SENT_SHUTDOWN))
733 if (rr->type == SSL3_RT_ALERT)
735 if ((rr->length != 2) || (rr->off != 0))
737 al=SSL3_AD_ILLEGAL_PARAMETER;
738 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_ALERT_RECORD);
745 /* clear from buffer */
748 if (s->info_callback != NULL)
750 else if (s->ctx->info_callback != NULL)
751 cb=s->ctx->info_callback;
756 cb(s,SSL_CB_READ_ALERT,j);
762 if (n == SSL3_AD_CLOSE_NOTIFY)
764 s->shutdown|=SSL_RECEIVED_SHUTDOWN;
770 s->rwstate=SSL_NOTHING;
771 s->s3->fatal_alert=n;
772 SSLerr(SSL_F_SSL3_READ_BYTES,1000+n);
773 s->shutdown|=SSL_RECEIVED_SHUTDOWN;
774 SSL_CTX_remove_session(s->ctx,s->session);
779 al=SSL3_AD_ILLEGAL_PARAMETER;
780 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE);
788 if (s->shutdown & SSL_SENT_SHUTDOWN)
790 s->rwstate=SSL_NOTHING;
795 if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
797 if ( (rr->length != 1) || (rr->off != 0) ||
798 (rr->data[0] != SSL3_MT_CCS))
800 i=SSL3_AD_ILLEGAL_PARAMETER;
801 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
807 s->s3->change_cipher_spec=1;
809 if (s->state & SSL_ST_ACCEPT)
810 i=SSL3_CHANGE_CIPHER_SERVER_READ;
812 i=SSL3_CHANGE_CIPHER_CLIENT_READ;
814 if (s->s3->tmp.key_block == NULL)
816 s->session->cipher=s->s3->tmp.new_cipher;
817 if (!ssl3_setup_key_block(s))
821 if (!ssl3_change_cipher_state(s,i))
824 /* we have to record the message digest at
825 * this point so we can get it before we read
826 * the finished message */
827 sender=(s->state & SSL_ST_CONNECT)
828 ?&(ssl3_server_finished_const[0])
829 :&(ssl3_client_finished_const[0]);
831 ssl3_final_finish_mac(s,&(s->s3->finish_dgst1),
832 sender,&(s->s3->tmp.finish_md1[0]));
833 ssl3_final_finish_mac(s,&(s->s3->finish_dgst2),
834 sender,&(s->s3->tmp.finish_md2[0]));
839 /* else we have a handshake */
840 if ((rr->type == SSL3_RT_HANDSHAKE) &&
843 if (((s->state&SSL_ST_MASK) == SSL_ST_OK) &&
844 !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS))
846 s->state=SSL_ST_BEFORE;
849 n=s->handshake_func(s);
850 if (n < 0) return(n);
853 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
859 al=SSL3_AD_UNEXPECTED_MESSAGE;
860 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
864 /* make sure that we are not getting application data when we
865 * are doing a handshake for the first time */
866 if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
867 (s->enc_read_ctx == NULL))
869 al=SSL3_AD_UNEXPECTED_MESSAGE;
870 SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE);
874 if (len <= 0) return(len);
876 if ((unsigned int)len > rr->length)
881 memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
885 s->rstate=SSL_ST_READ_HEADER;
887 if (type == SSL3_RT_HANDSHAKE)
888 ssl3_finish_mac(s,(unsigned char *)buf,n);
891 ssl3_send_alert(s,SSL3_AL_FATAL,al);
896 int ssl3_do_write(s,type)
902 ret=ssl3_write_bytes(s,type,(char *)
903 &(s->init_buf->data[s->init_off]),s->init_num);
904 if (ret == s->init_num)
906 if (ret < 0) return(-1);
912 void ssl3_send_alert(s,level,desc)
917 /* If a fatal one, remove from cache */
918 if ((level == 2) && (s->session != NULL))
919 SSL_CTX_remove_session(s->ctx,s->session);
921 s->s3->alert_dispatch=1;
922 s->s3->send_alert[0]=level;
923 s->s3->send_alert[1]=desc;
924 if (s->s3->wbuf.left == 0) /* data still being written out */
925 ssl3_dispatch_alert(s);
926 /* else data is still being written out, we will get written
927 * some time in the future */
930 int ssl3_dispatch_alert(s)
936 s->s3->alert_dispatch=0;
937 i=do_ssl3_write(s,SSL3_RT_ALERT,&(s->s3->send_alert[0]),2);
940 s->s3->alert_dispatch=1;
944 /* If it is important, send it now. If the message
945 * does not get sent due to non-blocking IO, we will
946 * not worry too much. */
947 if (s->s3->send_alert[0] == SSL3_AL_FATAL)
950 if (s->info_callback != NULL)
952 else if (s->ctx->info_callback != NULL)
953 cb=s->ctx->info_callback;
957 j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1];
958 cb(s,SSL_CB_WRITE_ALERT,j);