1 files changed, 55 insertions, 0 deletions
diff --git a/eBones/des/cbc_cksm.c b/eBones/des/cbc_cksm.c
new file mode 100644
index 0000000..b28dc75
--- /dev/null
+++ b/eBones/des/cbc_cksm.c
@@ -0,0 +1,55 @@
+/* cbc_cksm.c */
+/* Copyright (C) 1993 Eric Young - see README for more details */
+
+/*-
+ *	$Id: cbc_cksm.c,v 1.2 1994/07/19 19:21:45 g89r4222 Exp $
+ */
+
+#include "des_locl.h"
+
+unsigned long des_cbc_cksum(input,output,length,schedule,ivec)
+des_cblock *input;
+des_cblock *output;
+long length;
+des_key_schedule schedule;
+des_cblock *ivec;
+	{
+	register unsigned long tout0,tout1,tin0,tin1;
+	register long l=length;
+	unsigned long tin[2],tout[2];
+	unsigned char *in,*out,*iv;
+
+	in=(unsigned char *)input;
+	out=(unsigned char *)output;
+	iv=(unsigned char *)ivec;
+
+	c2l(iv,tout0);
+	c2l(iv,tout1);
+	for (; l>0; l-=8)
+		{
+		if (l >= 8)
+			{
+			c2l(in,tin0);
+			c2l(in,tin1);
+			}
+		else
+			c2ln(in,tin0,tin1,l);
+			
+		tin0^=tout0;
+		tin1^=tout1;
+		tin[0]=tin0;
+		tin[1]=tin1;
+		des_encrypt((unsigned long *)tin,(unsigned long *)tout,
+			schedule,DES_ENCRYPT);
+		/* fix 15/10/91 eay - thanks to keithr@sco.COM */
+		tout0=tout[0];
+		tout1=tout[1];
+		}
+	if (out != NULL)
+		{
+		l2c(tout0,out);
+		l2c(tout1,out);
+		}
+	tout0=tin0=tin1=tin[0]=tin[1]=tout[0]=tout[1]=0;
+	return(tout1);
+	}