*
*/
#include <stdint.h>
-#include <string.h>
+#include "string.h"
const uint8_t sbox[256] = {
/* S-box 1 */
uint64_t data;
uint8_t *sbp; /* sboxpointer */
permute((uint8_t*)e_permtab, (uint8_t*)&r, (uint8_t*)&data);
- for(i=0; i<7; ++i)
+ for(i=0; i<6; ++i)
((uint8_t*)&data)[i] ^= kr[i];
/* Sbox substitution */
des_dec(out, out, (uint8_t*)key + 0);
}
+void tdes_2key_enc(void* out, const void* in, size_t length, const void* key, unsigned char iv[8]){
+
+ if( length % 8 ) return;
+
+ uint8_t i;
+ uint8_t* tin = (uint8_t*) in;
+ uint8_t* tout = (uint8_t*) out;
+
+ while( length > 0 )
+ {
+ for ( i = 0; i < 8; i++ )
+ tout[i] = (unsigned char)(tin[i] ^ iv[i]);
+
+ des_enc(tout, tin, (uint8_t*)key + 0);
+ des_dec(tout, tout, (uint8_t*)key + 8);
+ des_enc(tout, tout, (uint8_t*)key + 0);
+
+ memcpy(iv, tout, 8);
+
+ tin += 8;
+ tout += 8;
+ length -= 8;
+ }
+}
+
+void tdes_2key_dec(void* out, const void* in, size_t length, const void* key, unsigned char iv[8]){
+
+ if( length % 8 ) return;
+
+ uint8_t i;
+ unsigned char temp[8];
+ uint8_t* tin = (uint8_t*) in;
+ uint8_t* tout = (uint8_t*) out;
+
+ while( length > 0 )
+ {
+ memcpy(temp, tin, 8);
+
+ des_dec(tout, tin, (uint8_t*)key + 0);
+ des_enc(tout, tout, (uint8_t*)key + 8);
+ des_dec(tout, tout, (uint8_t*)key + 0);
+
+ for (i = 0; i < 8; i++)
+ tout[i] = (unsigned char)(tout[i] ^ iv[i]);
+
+ memcpy(iv, temp, 8);
+
+ tin += 8;
+ tout += 8;
+ length -= 8;
+ }
+}
+
+
/******************************************************************************/