This is the long-awaited new DES library. Over the next couple of days

will be properly built into the system.

1 files changed, 142 insertions, 0 deletions

diff --git a/secure/lib/libdes/enc_writ.c b/secure/lib/libdes/enc_writ.c
new file mode 100644
index 0000000..e0d5075
--- /dev/null
+++ b/secure/lib/libdes/enc_writ.c
@@ -0,0 +1,142 @@
+/* lib/des/enc_writ.c */
+/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
+ * All rights reserved.
+ * 
+ * This file is part of an SSL implementation written
+ * by Eric Young (eay@mincom.oz.au).
+ * The implementation was written so as to conform with Netscapes SSL
+ * specification.  This library and applications are
+ * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
+ * as long as the following conditions are aheared to.
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.  If this code is used in a product,
+ * Eric Young should be given attribution as the author of the parts 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 software developed by Eric Young (eay@mincom.oz.au)
+ * 
+ * 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.]
+ */
+
+#include <errno.h>
+#include <time.h>
+#include "des_locl.h"
+
+int des_enc_write(fd, buf, len, sched, iv)
+int fd;
+char *buf;
+int len;
+des_key_schedule sched;
+des_cblock (*iv);
+	{
+#ifdef _LIBC
+	extern int srandom();
+	extern unsigned long time();
+	extern int random();
+	extern int write();
+#endif
+
+	long rnum;
+	int i,j,k,outnum;
+	char outbuf[BSIZE+HDRSIZE];
+	char shortbuf[8];
+	char *p;
+	static int start=1;
+
+	/* If we are sending less than 8 bytes, the same char will look
+	 * the same if we don't pad it out with random bytes */
+	if (start)
+		{
+		start=0;
+		srandom((unsigned int)time(NULL));
+		}
+
+	/* lets recurse if we want to send the data in small chunks */
+	if (len > MAXWRITE)
+		{
+		j=0;
+		for (i=0; i<len; i+=k)
+			{
+			k=des_enc_write(fd,&(buf[i]),
+				((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv);
+			if (k < 0)
+				return(k);
+			else
+				j+=k;
+			}
+		return(j);
+		}
+
+	/* write length first */
+	p=outbuf;
+	l2n(len,p);
+
+	/* pad short strings */
+	if (len < 8)
+		{
+		p=shortbuf;
+		memcpy(shortbuf,buf,(unsigned int)len);
+		for (i=len; i<8; i++)
+			shortbuf[i]=random();
+		rnum=8;
+		}
+	else
+		{
+		p=buf;
+		rnum=((len+7)/8*8); /* round up to nearest eight */
+		}
+
+	if (des_rw_mode & DES_PCBC_MODE)
+		pcbc_encrypt((des_cblock *)p,(des_cblock *)&(outbuf[HDRSIZE]),
+			(long)((len<8)?8:len),sched,iv,DES_ENCRYPT); 
+	else
+		cbc_encrypt((des_cblock *)p,(des_cblock *)&(outbuf[HDRSIZE]),
+			(long)((len<8)?8:len),sched,iv,DES_ENCRYPT); 
+
+	/* output */
+	outnum=rnum+HDRSIZE;
+
+	for (j=0; j<outnum; j+=i)
+		{
+		/* eay 26/08/92 I was not doing writing from where we
+		 * got upto. */
+		i=write(fd,&(outbuf[j]),(unsigned int)(outnum-j));
+		if (i == -1)
+			{
+			if (errno == EINTR)
+				i=0;
+			else 	/* This is really a bad error - very bad
+				 * It will stuff-up both ends. */
+				return(-1);
+			}
+		}
+
+	return(len);
+	}