--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/des/enc_read.c	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,259 @@
+/* crypto/des/enc_read.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/*
+ © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include "cryptlib.h"
+#include "des_locl.h"
+#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
+#include "libcrypto_wsd_macros.h"
+#include "libcrypto_wsd.h"
+#endif
+/* This has some uglies in it but it works - even over sockets. */
+/*extern int errno;*/
+#ifndef EMULATOR
+OPENSSL_IMPLEMENT_GLOBAL(int,DES_rw_mode)=DES_PCBC_MODE;
+#else
+#define DES_rw_mode libcrypto_ImpurePtr()->_shadow_DES_rw_mode
+#endif
+
+/*
+ * WARNINGS:
+ *
+ *  -  The data format used by DES_enc_write() and DES_enc_read()
+ *     has a cryptographic weakness: When asked to write more
+ *     than MAXWRITE bytes, DES_enc_write will split the data
+ *     into several chunks that are all encrypted
+ *     using the same IV.  So don't use these functions unless you
+ *     are sure you know what you do (in which case you might
+ *     not want to use them anyway).
+ *
+ *  -  This code cannot handle non-blocking sockets.
+ *
+ *  -  This function uses an internal state and thus cannot be
+ *     used on multiple files.
+ */
+
+#ifdef EMULATOR
+  GET_STATIC_VAR_FROM_TLS(net,enc_read,unsigned char *)
+  #define net (*GET_WSD_VAR_NAME(net,enc_read, s)())
+  
+  GET_STATIC_VAR_FROM_TLS(unnet,enc_read,unsigned char *)
+  #define unnet (*GET_WSD_VAR_NAME(unnet,enc_read, s)())
+  
+  GET_STATIC_VAR_FROM_TLS(unnet_start,enc_read,int)
+  #define unnet_start (*GET_WSD_VAR_NAME(unnet_start,enc_read, s)())
+  
+  GET_STATIC_VAR_FROM_TLS(unnet_left,enc_read,int)
+  #define unnet_left (*GET_WSD_VAR_NAME(unnet_left,enc_read, s)())
+
+  GET_STATIC_VAR_FROM_TLS(tmpbuf,enc_read,unsigned char *)
+  #define tmpbuf (*GET_WSD_VAR_NAME(tmpbuf,enc_read, s)())
+  
+
+#endif
+
+
+EXPORT_C int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched,
+		 DES_cblock *iv)
+	{
+	/* data to be unencrypted */
+	int net_num=0;
+#ifndef EMULATOR	
+	static unsigned char *net=NULL;
+
+	/* extra unencrypted data 
+	 * for when a block of 100 comes in but is des_read one byte at
+	 * a time. */
+	static unsigned char *unnet=NULL;
+	static int unnet_start=0;
+	static int unnet_left=0;
+	static unsigned char *tmpbuf=NULL;
+#endif		
+	int i;
+	long num=0,rnum;
+	unsigned char *p;
+
+	if (tmpbuf == NULL)
+		{
+		tmpbuf=OPENSSL_malloc(BSIZE);
+		if (tmpbuf == NULL) return(-1);
+		}
+	if (net == NULL)
+		{
+		net=OPENSSL_malloc(BSIZE);
+		if (net == NULL) return(-1);
+		}
+	if (unnet == NULL)
+		{
+		unnet=OPENSSL_malloc(BSIZE);
+		if (unnet == NULL) return(-1);
+		}
+	/* left over data from last decrypt */
+	if (unnet_left != 0)
+		{
+		if (unnet_left < len)
+			{
+			/* we still still need more data but will return
+			 * with the number of bytes we have - should always
+			 * check the return value */
+			memcpy(buf,&(unnet[unnet_start]),
+			       unnet_left);
+			/* eay 26/08/92 I had the next 2 lines
+			 * reversed :-( */
+			i=unnet_left;
+			unnet_start=unnet_left=0;
+			}
+		else
+			{
+			memcpy(buf,&(unnet[unnet_start]),len);
+			unnet_start+=len;
+			unnet_left-=len;
+			i=len;
+			}
+		return(i);
+		}
+
+	/* We need to get more data. */
+	if (len > MAXWRITE) len=MAXWRITE;
+
+	/* first - get the length */
+	while (net_num < HDRSIZE) 
+		{
+		i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
+#ifdef EINTR
+		if ((i == -1) && (errno == EINTR)) continue;
+#endif
+		if (i <= 0) return(0);
+		net_num+=i;
+		}
+
+	/* we now have at net_num bytes in net */
+	p=net;
+	/* num=0;  */
+	n2l(p,num);
+	/* num should be rounded up to the next group of eight
+	 * we make sure that we have read a multiple of 8 bytes from the net.
+	 */
+	if ((num > MAXWRITE) || (num < 0)) /* error */
+		return(-1);
+	rnum=(num < 8)?8:((num+7)/8*8);
+
+	net_num=0;
+	while (net_num < rnum)
+		{
+		i=read(fd,(void *)&(net[net_num]),rnum-net_num);
+#ifdef EINTR
+		if ((i == -1) && (errno == EINTR)) continue;
+#endif
+		if (i <= 0) return(0);
+		net_num+=i;
+		}
+
+	/* Check if there will be data left over. */
+	if (len < num)
+		{
+		if (DES_rw_mode & DES_PCBC_MODE)
+			DES_pcbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
+		else
+			DES_cbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
+		memcpy(buf,unnet,len);
+		unnet_start=len;
+		unnet_left=num-len;
+
+		/* The following line is done because we return num
+		 * as the number of bytes read. */
+		num=len;
+		}
+	else
+		{
+		/* >output is a multiple of 8 byes, if len < rnum
+		 * >we must be careful.  The user must be aware that this
+		 * >routine will write more bytes than he asked for.
+		 * >The length of the buffer must be correct.
+		 * FIXED - Should be ok now 18-9-90 - eay */
+		if (len < rnum)
+			{
+
+			if (DES_rw_mode & DES_PCBC_MODE)
+				DES_pcbc_encrypt(net,tmpbuf,num,sched,iv,
+						 DES_DECRYPT);
+			else
+				DES_cbc_encrypt(net,tmpbuf,num,sched,iv,
+						DES_DECRYPT);
+
+			/* eay 26/08/92 fix a bug that returned more
+			 * bytes than you asked for (returned len bytes :-( */
+			memcpy(buf,tmpbuf,num);
+			}
+		else
+			{
+			if (DES_rw_mode & DES_PCBC_MODE)
+				DES_pcbc_encrypt(net,buf,num,sched,iv,
+						 DES_DECRYPT);
+			else
+				DES_cbc_encrypt(net,buf,num,sched,iv,
+						DES_DECRYPT);
+			}
+		}
+	return num;
+	}
+