731 lines
24 KiB
C
731 lines
24 KiB
C
/* ssl/s2_pkt.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "ssl_locl.h"
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#ifndef OPENSSL_NO_SSL2
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# include <stdio.h>
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# include <errno.h>
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# define USE_SOCKETS
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static int read_n(SSL *s, unsigned int n, unsigned int max,
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unsigned int extend);
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static int n_do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len);
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static int write_pending(SSL *s, const unsigned char *buf, unsigned int len);
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static int ssl_mt_error(int n);
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/*
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* SSL 2.0 imlementation for SSL_read/SSL_peek - This routine will return 0
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* to len bytes, decrypted etc if required.
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*/
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static int ssl2_read_internal(SSL *s, void *buf, int len, int peek)
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{
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int n;
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unsigned char mac[MAX_MAC_SIZE];
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unsigned char *p;
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int i;
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int mac_size;
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ssl2_read_again:
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if (SSL_in_init(s) && !s->in_handshake) {
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n = s->handshake_func(s);
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if (n < 0)
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return (n);
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if (n == 0) {
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SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_SSL_HANDSHAKE_FAILURE);
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return (-1);
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}
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}
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clear_sys_error();
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s->rwstate = SSL_NOTHING;
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if (len <= 0)
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return (len);
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if (s->s2->ract_data_length != 0) { /* read from buffer */
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if (len > s->s2->ract_data_length)
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n = s->s2->ract_data_length;
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else
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n = len;
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memcpy(buf, s->s2->ract_data, (unsigned int)n);
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if (!peek) {
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s->s2->ract_data_length -= n;
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s->s2->ract_data += n;
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if (s->s2->ract_data_length == 0)
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s->rstate = SSL_ST_READ_HEADER;
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}
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return (n);
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}
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/*
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* s->s2->ract_data_length == 0 Fill the buffer, then goto
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* ssl2_read_again.
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*/
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if (s->rstate == SSL_ST_READ_HEADER) {
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if (s->first_packet) {
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n = read_n(s, 5, SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2, 0);
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if (n <= 0)
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return (n); /* error or non-blocking */
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s->first_packet = 0;
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p = s->packet;
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if (!((p[0] & 0x80) && ((p[2] == SSL2_MT_CLIENT_HELLO) ||
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(p[2] == SSL2_MT_SERVER_HELLO)))) {
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SSLerr(SSL_F_SSL2_READ_INTERNAL,
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SSL_R_NON_SSLV2_INITIAL_PACKET);
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return (-1);
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}
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} else {
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n = read_n(s, 2, SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2, 0);
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if (n <= 0)
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return (n); /* error or non-blocking */
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}
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/* part read stuff */
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s->rstate = SSL_ST_READ_BODY;
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p = s->packet;
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/* Do header */
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/*
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* s->s2->padding=0;
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*/
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s->s2->escape = 0;
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s->s2->rlength = (((unsigned int)p[0]) << 8) | ((unsigned int)p[1]);
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if ((p[0] & TWO_BYTE_BIT)) { /* Two byte header? */
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s->s2->three_byte_header = 0;
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s->s2->rlength &= TWO_BYTE_MASK;
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} else {
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s->s2->three_byte_header = 1;
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s->s2->rlength &= THREE_BYTE_MASK;
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/* security >s2->escape */
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s->s2->escape = ((p[0] & SEC_ESC_BIT)) ? 1 : 0;
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}
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}
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if (s->rstate == SSL_ST_READ_BODY) {
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n = s->s2->rlength + 2 + s->s2->three_byte_header;
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if (n > (int)s->packet_length) {
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n -= s->packet_length;
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i = read_n(s, (unsigned int)n, (unsigned int)n, 1);
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if (i <= 0)
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return (i); /* ERROR */
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}
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p = &(s->packet[2]);
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s->rstate = SSL_ST_READ_HEADER;
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if (s->s2->three_byte_header)
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s->s2->padding = *(p++);
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else
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s->s2->padding = 0;
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/* Data portion */
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if (s->s2->clear_text) {
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mac_size = 0;
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s->s2->mac_data = p;
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s->s2->ract_data = p;
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if (s->s2->padding) {
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SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_ILLEGAL_PADDING);
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return (-1);
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}
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} else {
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mac_size = EVP_MD_CTX_size(s->read_hash);
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if (mac_size < 0)
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return -1;
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OPENSSL_assert(mac_size <= MAX_MAC_SIZE);
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s->s2->mac_data = p;
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s->s2->ract_data = &p[mac_size];
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if (s->s2->padding + mac_size > s->s2->rlength) {
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SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_ILLEGAL_PADDING);
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return (-1);
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}
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}
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s->s2->ract_data_length = s->s2->rlength;
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/*
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* added a check for length > max_size in case encryption was not
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* turned on yet due to an error
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*/
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if ((!s->s2->clear_text) &&
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(s->s2->rlength >= (unsigned int)mac_size)) {
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if (!ssl2_enc(s, 0)) {
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SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_DECRYPTION_FAILED);
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return (-1);
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}
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s->s2->ract_data_length -= mac_size;
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ssl2_mac(s, mac, 0);
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s->s2->ract_data_length -= s->s2->padding;
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if ((CRYPTO_memcmp(mac, s->s2->mac_data, mac_size) != 0) ||
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(s->s2->rlength %
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EVP_CIPHER_CTX_block_size(s->enc_read_ctx) != 0)) {
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SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_BAD_MAC_DECODE);
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return (-1);
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}
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}
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INC32(s->s2->read_sequence); /* expect next number */
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/* s->s2->ract_data is now available for processing */
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/*
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* Possibly the packet that we just read had 0 actual data bytes.
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* (SSLeay/OpenSSL itself never sends such packets; see ssl2_write.)
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* In this case, returning 0 would be interpreted by the caller as
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* indicating EOF, so it's not a good idea. Instead, we just
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* continue reading; thus ssl2_read_internal may have to process
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* multiple packets before it can return. [Note that using select()
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* for blocking sockets *never* guarantees that the next SSL_read
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* will not block -- the available data may contain incomplete
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* packets, and except for SSL 2, renegotiation can confuse things
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* even more.]
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*/
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goto ssl2_read_again; /* This should really be "return
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* ssl2_read(s,buf,len)", but that would
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* allow for denial-of-service attacks if a C
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* compiler is used that does not recognize
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* end-recursion. */
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} else {
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SSLerr(SSL_F_SSL2_READ_INTERNAL, SSL_R_BAD_STATE);
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return (-1);
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}
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}
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int ssl2_read(SSL *s, void *buf, int len)
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{
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return ssl2_read_internal(s, buf, len, 0);
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}
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int ssl2_peek(SSL *s, void *buf, int len)
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{
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return ssl2_read_internal(s, buf, len, 1);
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}
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/*
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* Return values are as per SSL_read()
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*/
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static int read_n(SSL *s, unsigned int n, unsigned int max,
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unsigned int extend)
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{
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int i, off, newb;
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/*
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* if there is stuff still in the buffer from a previous read, and there
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* is more than we want, take some.
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*/
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if (s->s2->rbuf_left >= (int)n) {
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if (extend)
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s->packet_length += n;
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else {
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s->packet = &(s->s2->rbuf[s->s2->rbuf_offs]);
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s->packet_length = n;
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}
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s->s2->rbuf_left -= n;
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s->s2->rbuf_offs += n;
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return (n);
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}
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if (!s->read_ahead)
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max = n;
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if (max > (unsigned int)(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2))
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max = SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2;
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/*
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* Else we want more than we have. First, if there is some left or we
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* want to extend
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*/
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off = 0;
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if ((s->s2->rbuf_left != 0) || ((s->packet_length != 0) && extend)) {
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newb = s->s2->rbuf_left;
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if (extend) {
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off = s->packet_length;
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if (s->packet != s->s2->rbuf)
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memcpy(s->s2->rbuf, s->packet, (unsigned int)newb + off);
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} else if (s->s2->rbuf_offs != 0) {
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memcpy(s->s2->rbuf, &(s->s2->rbuf[s->s2->rbuf_offs]),
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(unsigned int)newb);
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s->s2->rbuf_offs = 0;
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}
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s->s2->rbuf_left = 0;
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} else
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newb = 0;
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/*
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* off is the offset to start writing too. r->s2->rbuf_offs is the
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* 'unread data', now 0. newb is the number of new bytes so far
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*/
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s->packet = s->s2->rbuf;
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while (newb < (int)n) {
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clear_sys_error();
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if (s->rbio != NULL) {
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s->rwstate = SSL_READING;
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i = BIO_read(s->rbio, (char *)&(s->s2->rbuf[off + newb]),
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max - newb);
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} else {
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SSLerr(SSL_F_READ_N, SSL_R_READ_BIO_NOT_SET);
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i = -1;
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}
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# ifdef PKT_DEBUG
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if (s->debug & 0x01)
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sleep(1);
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# endif
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if (i <= 0) {
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s->s2->rbuf_left += newb;
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return i;
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}
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newb += i;
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}
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|
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/* record unread data */
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if (newb > (int)n) {
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s->s2->rbuf_offs = n + off;
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s->s2->rbuf_left = newb - n;
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} else {
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s->s2->rbuf_offs = 0;
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s->s2->rbuf_left = 0;
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}
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if (extend)
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s->packet_length += n;
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else
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s->packet_length = n;
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s->rwstate = SSL_NOTHING;
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return (n);
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}
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int ssl2_write(SSL *s, const void *_buf, int len)
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{
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const unsigned char *buf = _buf;
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unsigned int n, tot;
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int i;
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if (SSL_in_init(s) && !s->in_handshake) {
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i = s->handshake_func(s);
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if (i < 0)
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return (i);
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if (i == 0) {
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SSLerr(SSL_F_SSL2_WRITE, SSL_R_SSL_HANDSHAKE_FAILURE);
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return (-1);
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}
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}
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|
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if (s->error) {
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ssl2_write_error(s);
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if (s->error)
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return (-1);
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}
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clear_sys_error();
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s->rwstate = SSL_NOTHING;
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if (len <= 0)
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return (len);
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tot = s->s2->wnum;
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s->s2->wnum = 0;
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n = (len - tot);
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for (;;) {
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i = n_do_ssl_write(s, &(buf[tot]), n);
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if (i <= 0) {
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s->s2->wnum = tot;
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return (i);
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}
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if ((i == (int)n) || (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE)) {
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return (tot + i);
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}
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n -= i;
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tot += i;
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}
|
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}
|
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|
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/*
|
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* Return values are as per SSL_write()
|
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*/
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static int write_pending(SSL *s, const unsigned char *buf, unsigned int len)
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{
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int i;
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|
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/* s->s2->wpend_len != 0 MUST be true. */
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|
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/*
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* check that they have given us the same buffer to write
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*/
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if ((s->s2->wpend_tot > (int)len) ||
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((s->s2->wpend_buf != buf) &&
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!(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER))) {
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SSLerr(SSL_F_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY);
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return (-1);
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}
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|
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for (;;) {
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clear_sys_error();
|
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if (s->wbio != NULL) {
|
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s->rwstate = SSL_WRITING;
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i = BIO_write(s->wbio,
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(char *)&(s->s2->write_ptr[s->s2->wpend_off]),
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(unsigned int)s->s2->wpend_len);
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} else {
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SSLerr(SSL_F_WRITE_PENDING, SSL_R_WRITE_BIO_NOT_SET);
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i = -1;
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}
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# ifdef PKT_DEBUG
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if (s->debug & 0x01)
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sleep(1);
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# endif
|
|
if (i == s->s2->wpend_len) {
|
|
s->s2->wpend_len = 0;
|
|
s->rwstate = SSL_NOTHING;
|
|
return (s->s2->wpend_ret);
|
|
} else if (i <= 0)
|
|
return i;
|
|
s->s2->wpend_off += i;
|
|
s->s2->wpend_len -= i;
|
|
}
|
|
}
|
|
|
|
static int n_do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len)
|
|
{
|
|
unsigned int j, k, olen, p, bs;
|
|
int mac_size;
|
|
register unsigned char *pp;
|
|
|
|
olen = len;
|
|
|
|
/*
|
|
* first check if there is data from an encryption waiting to be sent -
|
|
* it must be sent because the other end is waiting. This will happen
|
|
* with non-blocking IO. We print it and then return.
|
|
*/
|
|
if (s->s2->wpend_len != 0)
|
|
return (write_pending(s, buf, len));
|
|
|
|
/* set mac_size to mac size */
|
|
if (s->s2->clear_text)
|
|
mac_size = 0;
|
|
else {
|
|
mac_size = EVP_MD_CTX_size(s->write_hash);
|
|
if (mac_size < 0)
|
|
return -1;
|
|
}
|
|
|
|
/* lets set the pad p */
|
|
if (s->s2->clear_text) {
|
|
if (len > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)
|
|
len = SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;
|
|
p = 0;
|
|
s->s2->three_byte_header = 0;
|
|
/* len=len; */
|
|
} else {
|
|
bs = EVP_CIPHER_CTX_block_size(s->enc_read_ctx);
|
|
j = len + mac_size;
|
|
/*
|
|
* Two-byte headers allow for a larger record length than three-byte
|
|
* headers, but we can't use them if we need padding or if we have to
|
|
* set the escape bit.
|
|
*/
|
|
if ((j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) && (!s->s2->escape)) {
|
|
if (j > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)
|
|
j = SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;
|
|
/*
|
|
* set k to the max number of bytes with 2 byte header
|
|
*/
|
|
k = j - (j % bs);
|
|
/* how many data bytes? */
|
|
len = k - mac_size;
|
|
s->s2->three_byte_header = 0;
|
|
p = 0;
|
|
} else if ((bs <= 1) && (!s->s2->escape)) {
|
|
/*-
|
|
* j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER, thus
|
|
* j < SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER
|
|
*/
|
|
s->s2->three_byte_header = 0;
|
|
p = 0;
|
|
} else { /* we may have to use a 3 byte header */
|
|
|
|
/*-
|
|
* If s->s2->escape is not set, then
|
|
* j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER, and thus
|
|
* j < SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER.
|
|
*/
|
|
p = (j % bs);
|
|
p = (p == 0) ? 0 : (bs - p);
|
|
if (s->s2->escape) {
|
|
s->s2->three_byte_header = 1;
|
|
if (j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
|
|
j = SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER;
|
|
} else
|
|
s->s2->three_byte_header = (p == 0) ? 0 : 1;
|
|
}
|
|
}
|
|
|
|
/*-
|
|
* Now
|
|
* j <= SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER
|
|
* holds, and if s->s2->three_byte_header is set, then even
|
|
* j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER.
|
|
*/
|
|
|
|
/*
|
|
* mac_size is the number of MAC bytes len is the number of data bytes we
|
|
* are going to send p is the number of padding bytes (if it is a
|
|
* two-byte header, then p == 0)
|
|
*/
|
|
|
|
s->s2->wlength = len;
|
|
s->s2->padding = p;
|
|
s->s2->mac_data = &(s->s2->wbuf[3]);
|
|
s->s2->wact_data = &(s->s2->wbuf[3 + mac_size]);
|
|
|
|
/*
|
|
* It would be clearer to write this as follows:
|
|
* if (mac_size + len + p > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)
|
|
* However |len| is user input that could in theory be very large. We
|
|
* know |mac_size| and |p| are small, so to avoid any possibility of
|
|
* overflow we write it like this.
|
|
*
|
|
* In theory this should never fail because the logic above should have
|
|
* modified |len| if it is too big. But we are being cautious.
|
|
*/
|
|
if (len > (SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER - (mac_size + p))) {
|
|
return -1;
|
|
}
|
|
/* we copy the data into s->s2->wbuf */
|
|
memcpy(s->s2->wact_data, buf, len);
|
|
if (p)
|
|
memset(&(s->s2->wact_data[len]), 0, p); /* arbitrary padding */
|
|
|
|
if (!s->s2->clear_text) {
|
|
s->s2->wact_data_length = len + p;
|
|
ssl2_mac(s, s->s2->mac_data, 1);
|
|
s->s2->wlength += p + mac_size;
|
|
if (ssl2_enc(s, 1) < 1)
|
|
return -1;
|
|
}
|
|
|
|
/* package up the header */
|
|
s->s2->wpend_len = s->s2->wlength;
|
|
if (s->s2->three_byte_header) { /* 3 byte header */
|
|
pp = s->s2->mac_data;
|
|
pp -= 3;
|
|
pp[0] = (s->s2->wlength >> 8) & (THREE_BYTE_MASK >> 8);
|
|
if (s->s2->escape)
|
|
pp[0] |= SEC_ESC_BIT;
|
|
pp[1] = s->s2->wlength & 0xff;
|
|
pp[2] = s->s2->padding;
|
|
s->s2->wpend_len += 3;
|
|
} else {
|
|
pp = s->s2->mac_data;
|
|
pp -= 2;
|
|
pp[0] = ((s->s2->wlength >> 8) & (TWO_BYTE_MASK >> 8)) | TWO_BYTE_BIT;
|
|
pp[1] = s->s2->wlength & 0xff;
|
|
s->s2->wpend_len += 2;
|
|
}
|
|
s->s2->write_ptr = pp;
|
|
|
|
INC32(s->s2->write_sequence); /* expect next number */
|
|
|
|
/* lets try to actually write the data */
|
|
s->s2->wpend_tot = olen;
|
|
s->s2->wpend_buf = buf;
|
|
|
|
s->s2->wpend_ret = len;
|
|
|
|
s->s2->wpend_off = 0;
|
|
return (write_pending(s, buf, olen));
|
|
}
|
|
|
|
int ssl2_part_read(SSL *s, unsigned long f, int i)
|
|
{
|
|
unsigned char *p;
|
|
int j;
|
|
|
|
if (i < 0) {
|
|
/* ssl2_return_error(s); */
|
|
/*
|
|
* for non-blocking io, this is not necessarily fatal
|
|
*/
|
|
return (i);
|
|
} else {
|
|
s->init_num += i;
|
|
|
|
/*
|
|
* Check for error. While there are recoverable errors, this
|
|
* function is not called when those must be expected; any error
|
|
* detected here is fatal.
|
|
*/
|
|
if (s->init_num >= 3) {
|
|
p = (unsigned char *)s->init_buf->data;
|
|
if (p[0] == SSL2_MT_ERROR) {
|
|
j = (p[1] << 8) | p[2];
|
|
SSLerr((int)f, ssl_mt_error(j));
|
|
s->init_num -= 3;
|
|
if (s->init_num > 0)
|
|
memmove(p, p + 3, s->init_num);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If it's not an error message, we have some error anyway -- the
|
|
* message was shorter than expected. This too is treated as fatal
|
|
* (at least if SSL_get_error is asked for its opinion).
|
|
*/
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
int ssl2_do_write(SSL *s)
|
|
{
|
|
int ret;
|
|
|
|
ret = ssl2_write(s, &s->init_buf->data[s->init_off], s->init_num);
|
|
if (ret == s->init_num) {
|
|
if (s->msg_callback)
|
|
s->msg_callback(1, s->version, 0, s->init_buf->data,
|
|
(size_t)(s->init_off + s->init_num), s,
|
|
s->msg_callback_arg);
|
|
return (1);
|
|
}
|
|
if (ret < 0)
|
|
return (-1);
|
|
s->init_off += ret;
|
|
s->init_num -= ret;
|
|
return (0);
|
|
}
|
|
|
|
static int ssl_mt_error(int n)
|
|
{
|
|
int ret;
|
|
|
|
switch (n) {
|
|
case SSL2_PE_NO_CIPHER:
|
|
ret = SSL_R_PEER_ERROR_NO_CIPHER;
|
|
break;
|
|
case SSL2_PE_NO_CERTIFICATE:
|
|
ret = SSL_R_PEER_ERROR_NO_CERTIFICATE;
|
|
break;
|
|
case SSL2_PE_BAD_CERTIFICATE:
|
|
ret = SSL_R_PEER_ERROR_CERTIFICATE;
|
|
break;
|
|
case SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE:
|
|
ret = SSL_R_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE;
|
|
break;
|
|
default:
|
|
ret = SSL_R_UNKNOWN_REMOTE_ERROR_TYPE;
|
|
break;
|
|
}
|
|
return (ret);
|
|
}
|
|
#else /* !OPENSSL_NO_SSL2 */
|
|
|
|
# if PEDANTIC
|
|
static void *dummy = &dummy;
|
|
# endif
|
|
|
|
#endif
|