X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=secnet.git;a=blobdiff_plain;f=serpent.c;h=ce918547155015ea7981c9ed51b87b345e9e1619;hp=51b27ba688b9581121c36e562f541f969dc7a93a;hb=065e1922e00c787775b595badce0e40a999a6afb;hpb=2fe58dfd10216a37f1ece081f926971882de112e

diff --git a/serpent.c b/serpent.c
index 51b27ba..ce91854 100644
--- a/serpent.c
+++ b/serpent.c
@@ -28,13 +28,15 @@
 void serpent_makekey(struct keyInstance *key, int keyLen,
 	    uint8_t *keyMaterial)
 {
-    uint32_t i,j;
+    int i;
+    uint32_t j;
     uint32_t w[132],k[132];
 
     for(i=0; i<keyLen/32; i++)
-	w[i]=keyMaterial[i];
+	w[i]=GET_32BIT_MSB_FIRST(keyMaterial + (keyLen/8 - i*4) - 4);
     if(keyLen<256)
-	w[i]=(keyMaterial[i]&((1L<<((keyLen&31)))-1))|(1L<<((keyLen&31)));
+	w[i]=(GET_32BIT_MSB_FIRST(keyMaterial + (keyLen/8 - i*4) - 4)
+              & ((1L<<((keyLen&31)))-1)) | (1L<<((keyLen&31)));
     for(i++; i<8; i++)
 	w[i]=0;
     for(i=8; i<16; i++)
@@ -84,16 +86,16 @@ void serpent_makekey(struct keyInstance *key, int keyLen,
 }
 
 void serpent_encrypt(struct keyInstance *key,
-		     uint32_t plaintext[4], 
-		     uint32_t ciphertext[4])
+		     uint8_t plaintext[16], 
+		     uint8_t ciphertext[16])
 {
     register uint32_t x0, x1, x2, x3;
     register uint32_t y0, y1, y2, y3;
 
-    x0=plaintext[0];
-    x1=plaintext[1];
-    x2=plaintext[2];
-    x3=plaintext[3];
+    x0=GET_32BIT_MSB_FIRST(plaintext+12);
+    x1=GET_32BIT_MSB_FIRST(plaintext+8);
+    x2=GET_32BIT_MSB_FIRST(plaintext+4);
+    x3=GET_32BIT_MSB_FIRST(plaintext);
 
     /* Start to encrypt the plaintext x */
     keying(x0, x1, x2, x3, key->subkeys[ 0]);
@@ -195,23 +197,23 @@ void serpent_encrypt(struct keyInstance *key,
     keying(x0, x1, x2, x3, key->subkeys[32]);
     /* The ciphertext is now in x */
 
-    ciphertext[0] = x0;
-    ciphertext[1] = x1;
-    ciphertext[2] = x2;
-    ciphertext[3] = x3;
+    PUT_32BIT_MSB_FIRST(ciphertext+12, x0);
+    PUT_32BIT_MSB_FIRST(ciphertext+8, x1);
+    PUT_32BIT_MSB_FIRST(ciphertext+4, x2);
+    PUT_32BIT_MSB_FIRST(ciphertext, x3);
 }
 
 void serpent_decrypt(struct keyInstance *key,
-		     uint32_t ciphertext[4],
-		     uint32_t plaintext[4])
+		     uint8_t ciphertext[16],
+		     uint8_t plaintext[16])
 {
     register uint32_t x0, x1, x2, x3;
     register uint32_t y0, y1, y2, y3;
 
-    x0=ciphertext[0];
-    x1=ciphertext[1];
-    x2=ciphertext[2];
-    x3=ciphertext[3];
+    x0=GET_32BIT_MSB_FIRST(ciphertext+12);
+    x1=GET_32BIT_MSB_FIRST(ciphertext+8);
+    x2=GET_32BIT_MSB_FIRST(ciphertext+4);
+    x3=GET_32BIT_MSB_FIRST(ciphertext);
 
     /* Start to decrypt the ciphertext x */
     keying(x0, x1, x2, x3, key->subkeys[32]);
@@ -313,8 +315,8 @@ void serpent_decrypt(struct keyInstance *key,
     keying(x0, x1, x2, x3, key->subkeys[ 0]);
     /* The plaintext is now in x */
 
-    plaintext[0] = x0;
-    plaintext[1] = x1;
-    plaintext[2] = x2;
-    plaintext[3] = x3;
+    PUT_32BIT_MSB_FIRST(plaintext+12, x0);
+    PUT_32BIT_MSB_FIRST(plaintext+8, x1);
+    PUT_32BIT_MSB_FIRST(plaintext+4, x2);
+    PUT_32BIT_MSB_FIRST(plaintext, x3);
 }