/* crypto/des/ncbc_enc.c */
+/*
+ * #included by:
+ * cbc_enc.c (des_cbc_encrypt)
+ * des_enc.c (des_ncbc_encrypt)
+ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
#include "des_locl.h"
-void des_ncbc_encrypt(des_cblock (*input), des_cblock (*output), long length,
- des_key_schedule schedule, des_cblock (*ivec), int enc)
+#ifdef CBC_ENC_C__DONT_UPDATE_IV
+void des_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
+ des_key_schedule schedule, des_cblock *ivec, int enc)
+#else
+void des_ncbc_encrypt(const unsigned char *in, unsigned char *out, long length,
+ des_key_schedule schedule, des_cblock *ivec, int enc)
+#endif
{
register DES_LONG tin0,tin1;
register DES_LONG tout0,tout1,xor0,xor1;
- register unsigned char *in,*out;
register long l=length;
DES_LONG tin[2];
unsigned char *iv;
- in=(unsigned char *)input;
- out=(unsigned char *)output;
- iv=(unsigned char *)ivec;
+ iv = &(*ivec)[0];
if (enc)
{
tout0=tin[0]; l2c(tout0,out);
tout1=tin[1]; l2c(tout1,out);
}
- iv=(unsigned char *)ivec;
+#ifndef CBC_ENC_C__DONT_UPDATE_IV
+ iv = &(*ivec)[0];
l2c(tout0,iv);
l2c(tout1,iv);
+#endif
}
else
{
xor0=tin0;
xor1=tin1;
}
- iv=(unsigned char *)ivec;
+ if (l != -8)
+ {
+ c2l(in,tin0); tin[0]=tin0;
+ c2l(in,tin1); tin[1]=tin1;
+ des_encrypt((DES_LONG *)tin,schedule,DES_DECRYPT);
+ tout0=tin[0]^xor0;
+ tout1=tin[1]^xor1;
+ l2cn(tout0,tout1,out,l+8);
+#ifndef CBC_ENC_C__DONT_UPDATE_IV
+ xor0=tin0;
+ xor1=tin1;
+#endif
+ }
+#ifndef CBC_ENC_C__DONT_UPDATE_IV
+ iv = &(*ivec)[0];
l2c(xor0,iv);
l2c(xor1,iv);
+#endif
}
tin0=tin1=tout0=tout1=xor0=xor1=0;
tin[0]=tin[1]=0;
}
-