grr, bytes -> bits 1st part

[my-code/crypto.git] / des.c

diff --git a/des.c b/des.c
index a1cdbba..29cfa94 100644 (file)
--- a/des.c
+++ b/des.c
@@ -42,9 +42,10 @@ int rotate_left(u8 *obj,int len) {
 
 key_perm(u8 *key) {
  int i;
- u8 *new[DES_SUBKEY_LEN];
+ u8 *new[DES_SUBKEY_LEN/8];
+ memset(new,0,DES_SUBKEY_LEN/8];
  for(i=0;i<DES_SUBKEY_LEN;i++)
-  new[i]=key[key_perm_table[i]];
+  new[i/8]|=(key[key_perm_table[i]/8]>>((8-key_perm_table[i]%8)%8);
  memcpy(key,new,DES_SUBKEY_LEN);
  return 1;
 }
@@ -58,13 +59,22 @@ int subkey_trans(u8 *key,int round) {
  return 1;
 }
 
+int fuckup_data(u8 *key,int round,u8 *plain,u8 *crypted) {
+ u8 permc[DES_PERMC_LEN];
+ int i;
+ for(i=0;i<DES_PERMC_LEN;i++)
+  permc[i]=key[subkey_perm_table[i]];
+ 
+ return 1;
+}
+
 int des_crypt(u8 *plain,u8 *crypted,u8 *key) {
  int round;
 
  key_perm(key);
  for(round=0;round<DES_ROUND;round++) {
   subkey_trans(key,round);
-  // fuckup_data(key,round);
+  // fuckup_data(key,round,plain,crypted);
  }
 
  return 1;