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