This is an implementation of Triple DES Cipher Block Chaining with Output
Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).
+Note that there is a known attack on this by Biham and Knudsen but it takes
+a lot of work:
+
+http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz
+
*/
+#ifndef NO_DESCBCM
#include "des_locl.h"
-void des_ede3_cbcm_encrypt(const unsigned char *in,unsigned char *out,
- long length,
- des_key_schedule ks1,des_key_schedule ks2,
- des_key_schedule ks3,
- des_cblock ivec1,des_cblock ivec2,
- int enc)
+void des_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out,
+ long length, des_key_schedule ks1, des_key_schedule ks2,
+ des_key_schedule ks3, des_cblock *ivec1, des_cblock *ivec2,
+ int enc)
{
register DES_LONG tin0,tin1;
register DES_LONG tout0,tout1,xor0,xor1,m0,m1;
DES_LONG tin[2];
unsigned char *iv1,*iv2;
- iv1=ivec1;
- iv2=ivec2;
+ iv1 = &(*ivec1)[0];
+ iv2 = &(*ivec2)[0];
if (enc)
{
l2c(tout0,out);
l2c(tout1,out);
}
- iv1=ivec1;
+ iv1=&(*ivec1)[0];
l2c(m0,iv1);
l2c(m1,iv1);
- iv2=ivec2;
+ iv2=&(*ivec2)[0];
l2c(tout0,iv2);
l2c(tout1,iv2);
}
xor1=t1;
}
- iv1=ivec1;
+ iv1=&(*ivec1)[0];
l2c(m0,iv1);
l2c(m1,iv1);
- iv2=ivec2;
+ iv2=&(*ivec2)[0];
l2c(xor0,iv2);
l2c(xor1,iv2);
}
tin0=tin1=tout0=tout1=xor0=xor1=0;
tin[0]=tin[1]=0;
}
+#endif