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authorHans-Joerg Hoexer <hshoexer@cvs.openbsd.org>2005-03-24 11:45:29 +0000
committerHans-Joerg Hoexer <hshoexer@cvs.openbsd.org>2005-03-24 11:45:29 +0000
commit14bb30709ef6131279abc6e8bad4a8c3e588ad99 (patch)
tree88416ad8c14834bfaf9ef44ff724e4eba13c0f65 /sys
parent70efe0d869583bb589a6fd9d4ec8d81f50e1f7f2 (diff)
major knf
fix spelling in comment, by rohee@ no binary change ok deraadt@
Diffstat (limited to 'sys')
-rw-r--r--sys/crypto/cast.c144
1 files changed, 89 insertions, 55 deletions
diff --git a/sys/crypto/cast.c b/sys/crypto/cast.c
index da812a9038e..e251dfbc022 100644
--- a/sys/crypto/cast.c
+++ b/sys/crypto/cast.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cast.c,v 1.2 2000/06/06 06:49:47 deraadt Exp $ */
+/* $OpenBSD: cast.c,v 1.3 2005/03/24 11:45:28 hshoexer Exp $ */
/*
* CAST-128 in C
@@ -37,15 +37,16 @@
/***** Encryption Function *****/
-void cast_encrypt(cast_key* key, u_int8_t* inblock, u_int8_t* outblock)
+void
+cast_encrypt(cast_key *key, u_int8_t *inblock, u_int8_t *outblock)
{
-u_int32_t t, l, r;
+ u_int32_t t, l, r;
/* Get inblock into l,r */
l = ((u_int32_t)inblock[0] << 24) | ((u_int32_t)inblock[1] << 16) |
- ((u_int32_t)inblock[2] << 8) | (u_int32_t)inblock[3];
+ ((u_int32_t)inblock[2] << 8) | (u_int32_t)inblock[3];
r = ((u_int32_t)inblock[4] << 24) | ((u_int32_t)inblock[5] << 16) |
- ((u_int32_t)inblock[6] << 8) | (u_int32_t)inblock[7];
+ ((u_int32_t)inblock[6] << 8) | (u_int32_t)inblock[7];
/* Do the work */
F1(l, r, 0);
F2(r, l, 1);
@@ -82,15 +83,16 @@ u_int32_t t, l, r;
/***** Decryption Function *****/
-void cast_decrypt(cast_key* key, u_int8_t* inblock, u_int8_t* outblock)
+void
+cast_decrypt(cast_key *key, u_int8_t *inblock, u_int8_t *outblock)
{
-u_int32_t t, l, r;
+ u_int32_t t, l, r;
/* Get inblock into l,r */
r = ((u_int32_t)inblock[0] << 24) | ((u_int32_t)inblock[1] << 16) |
- ((u_int32_t)inblock[2] << 8) | (u_int32_t)inblock[3];
+ ((u_int32_t)inblock[2] << 8) | (u_int32_t)inblock[3];
l = ((u_int32_t)inblock[4] << 24) | ((u_int32_t)inblock[5] << 16) |
- ((u_int32_t)inblock[6] << 8) | (u_int32_t)inblock[7];
+ ((u_int32_t)inblock[6] << 8) | (u_int32_t)inblock[7];
/* Do the work */
/* Only do full 16 rounds if key length > 80 bits */
if (key->rounds > 12) {
@@ -125,12 +127,13 @@ u_int32_t t, l, r;
}
-/***** Key Schedual *****/
+/***** Key Schedule *****/
-void cast_setkey(cast_key* key, u_int8_t* rawkey, int keybytes)
+void
+cast_setkey(cast_key *key, u_int8_t *rawkey, int keybytes)
{
-u_int32_t t[4], z[4], x[4];
-int i;
+ u_int32_t t[4], z[4], x[4];
+ int i;
/* Set number of rounds to 12 or 16, depending on key length */
key->rounds = (keybytes <= 10 ? 12 : 16);
@@ -146,79 +149,111 @@ int i;
/* Generate 32 subkeys, four at a time */
for (i = 0; i < 32; i+=4) {
switch (i & 4) {
- case 0:
+ case 0:
t[0] = z[0] = x[0] ^ cast_sbox5[U_INT8_Tb(x[3])] ^
- cast_sbox6[U_INT8_Td(x[3])] ^ cast_sbox7[U_INT8_Ta(x[3])] ^
- cast_sbox8[U_INT8_Tc(x[3])] ^ cast_sbox7[U_INT8_Ta(x[2])];
+ cast_sbox6[U_INT8_Td(x[3])] ^
+ cast_sbox7[U_INT8_Ta(x[3])] ^
+ cast_sbox8[U_INT8_Tc(x[3])] ^
+ cast_sbox7[U_INT8_Ta(x[2])];
t[1] = z[1] = x[2] ^ cast_sbox5[U_INT8_Ta(z[0])] ^
- cast_sbox6[U_INT8_Tc(z[0])] ^ cast_sbox7[U_INT8_Tb(z[0])] ^
- cast_sbox8[U_INT8_Td(z[0])] ^ cast_sbox8[U_INT8_Tc(x[2])];
+ cast_sbox6[U_INT8_Tc(z[0])] ^
+ cast_sbox7[U_INT8_Tb(z[0])] ^
+ cast_sbox8[U_INT8_Td(z[0])] ^
+ cast_sbox8[U_INT8_Tc(x[2])];
t[2] = z[2] = x[3] ^ cast_sbox5[U_INT8_Td(z[1])] ^
- cast_sbox6[U_INT8_Tc(z[1])] ^ cast_sbox7[U_INT8_Tb(z[1])] ^
- cast_sbox8[U_INT8_Ta(z[1])] ^ cast_sbox5[U_INT8_Tb(x[2])];
+ cast_sbox6[U_INT8_Tc(z[1])] ^
+ cast_sbox7[U_INT8_Tb(z[1])] ^
+ cast_sbox8[U_INT8_Ta(z[1])] ^
+ cast_sbox5[U_INT8_Tb(x[2])];
t[3] = z[3] = x[1] ^ cast_sbox5[U_INT8_Tc(z[2])] ^
- cast_sbox6[U_INT8_Tb(z[2])] ^ cast_sbox7[U_INT8_Td(z[2])] ^
- cast_sbox8[U_INT8_Ta(z[2])] ^ cast_sbox6[U_INT8_Td(x[2])];
+ cast_sbox6[U_INT8_Tb(z[2])] ^
+ cast_sbox7[U_INT8_Td(z[2])] ^
+ cast_sbox8[U_INT8_Ta(z[2])] ^
+ cast_sbox6[U_INT8_Td(x[2])];
break;
case 4:
t[0] = x[0] = z[2] ^ cast_sbox5[U_INT8_Tb(z[1])] ^
- cast_sbox6[U_INT8_Td(z[1])] ^ cast_sbox7[U_INT8_Ta(z[1])] ^
- cast_sbox8[U_INT8_Tc(z[1])] ^ cast_sbox7[U_INT8_Ta(z[0])];
+ cast_sbox6[U_INT8_Td(z[1])] ^
+ cast_sbox7[U_INT8_Ta(z[1])] ^
+ cast_sbox8[U_INT8_Tc(z[1])] ^
+ cast_sbox7[U_INT8_Ta(z[0])];
t[1] = x[1] = z[0] ^ cast_sbox5[U_INT8_Ta(x[0])] ^
- cast_sbox6[U_INT8_Tc(x[0])] ^ cast_sbox7[U_INT8_Tb(x[0])] ^
- cast_sbox8[U_INT8_Td(x[0])] ^ cast_sbox8[U_INT8_Tc(z[0])];
+ cast_sbox6[U_INT8_Tc(x[0])] ^
+ cast_sbox7[U_INT8_Tb(x[0])] ^
+ cast_sbox8[U_INT8_Td(x[0])] ^
+ cast_sbox8[U_INT8_Tc(z[0])];
t[2] = x[2] = z[1] ^ cast_sbox5[U_INT8_Td(x[1])] ^
- cast_sbox6[U_INT8_Tc(x[1])] ^ cast_sbox7[U_INT8_Tb(x[1])] ^
- cast_sbox8[U_INT8_Ta(x[1])] ^ cast_sbox5[U_INT8_Tb(z[0])];
+ cast_sbox6[U_INT8_Tc(x[1])] ^
+ cast_sbox7[U_INT8_Tb(x[1])] ^
+ cast_sbox8[U_INT8_Ta(x[1])] ^
+ cast_sbox5[U_INT8_Tb(z[0])];
t[3] = x[3] = z[3] ^ cast_sbox5[U_INT8_Tc(x[2])] ^
- cast_sbox6[U_INT8_Tb(x[2])] ^ cast_sbox7[U_INT8_Td(x[2])] ^
- cast_sbox8[U_INT8_Ta(x[2])] ^ cast_sbox6[U_INT8_Td(z[0])];
+ cast_sbox6[U_INT8_Tb(x[2])] ^
+ cast_sbox7[U_INT8_Td(x[2])] ^
+ cast_sbox8[U_INT8_Ta(x[2])] ^
+ cast_sbox6[U_INT8_Td(z[0])];
break;
}
switch (i & 12) {
- case 0:
- case 12:
- key->xkey[i+0] = cast_sbox5[U_INT8_Ta(t[2])] ^ cast_sbox6[U_INT8_Tb(t[2])] ^
- cast_sbox7[U_INT8_Td(t[1])] ^ cast_sbox8[U_INT8_Tc(t[1])];
- key->xkey[i+1] = cast_sbox5[U_INT8_Tc(t[2])] ^ cast_sbox6[U_INT8_Td(t[2])] ^
- cast_sbox7[U_INT8_Tb(t[1])] ^ cast_sbox8[U_INT8_Ta(t[1])];
- key->xkey[i+2] = cast_sbox5[U_INT8_Ta(t[3])] ^ cast_sbox6[U_INT8_Tb(t[3])] ^
- cast_sbox7[U_INT8_Td(t[0])] ^ cast_sbox8[U_INT8_Tc(t[0])];
- key->xkey[i+3] = cast_sbox5[U_INT8_Tc(t[3])] ^ cast_sbox6[U_INT8_Td(t[3])] ^
- cast_sbox7[U_INT8_Tb(t[0])] ^ cast_sbox8[U_INT8_Ta(t[0])];
+ case 0:
+ case 12:
+ key->xkey[i+0] = cast_sbox5[U_INT8_Ta(t[2])] ^
+ cast_sbox6[U_INT8_Tb(t[2])] ^
+ cast_sbox7[U_INT8_Td(t[1])] ^
+ cast_sbox8[U_INT8_Tc(t[1])];
+ key->xkey[i+1] = cast_sbox5[U_INT8_Tc(t[2])] ^
+ cast_sbox6[U_INT8_Td(t[2])] ^
+ cast_sbox7[U_INT8_Tb(t[1])] ^
+ cast_sbox8[U_INT8_Ta(t[1])];
+ key->xkey[i+2] = cast_sbox5[U_INT8_Ta(t[3])] ^
+ cast_sbox6[U_INT8_Tb(t[3])] ^
+ cast_sbox7[U_INT8_Td(t[0])] ^
+ cast_sbox8[U_INT8_Tc(t[0])];
+ key->xkey[i+3] = cast_sbox5[U_INT8_Tc(t[3])] ^
+ cast_sbox6[U_INT8_Td(t[3])] ^
+ cast_sbox7[U_INT8_Tb(t[0])] ^
+ cast_sbox8[U_INT8_Ta(t[0])];
break;
- case 4:
- case 8:
- key->xkey[i+0] = cast_sbox5[U_INT8_Td(t[0])] ^ cast_sbox6[U_INT8_Tc(t[0])] ^
- cast_sbox7[U_INT8_Ta(t[3])] ^ cast_sbox8[U_INT8_Tb(t[3])];
- key->xkey[i+1] = cast_sbox5[U_INT8_Tb(t[0])] ^ cast_sbox6[U_INT8_Ta(t[0])] ^
- cast_sbox7[U_INT8_Tc(t[3])] ^ cast_sbox8[U_INT8_Td(t[3])];
- key->xkey[i+2] = cast_sbox5[U_INT8_Td(t[1])] ^ cast_sbox6[U_INT8_Tc(t[1])] ^
- cast_sbox7[U_INT8_Ta(t[2])] ^ cast_sbox8[U_INT8_Tb(t[2])];
- key->xkey[i+3] = cast_sbox5[U_INT8_Tb(t[1])] ^ cast_sbox6[U_INT8_Ta(t[1])] ^
- cast_sbox7[U_INT8_Tc(t[2])] ^ cast_sbox8[U_INT8_Td(t[2])];
+ case 4:
+ case 8:
+ key->xkey[i+0] = cast_sbox5[U_INT8_Td(t[0])] ^
+ cast_sbox6[U_INT8_Tc(t[0])] ^
+ cast_sbox7[U_INT8_Ta(t[3])] ^
+ cast_sbox8[U_INT8_Tb(t[3])];
+ key->xkey[i+1] = cast_sbox5[U_INT8_Tb(t[0])] ^
+ cast_sbox6[U_INT8_Ta(t[0])] ^
+ cast_sbox7[U_INT8_Tc(t[3])] ^
+ cast_sbox8[U_INT8_Td(t[3])];
+ key->xkey[i+2] = cast_sbox5[U_INT8_Td(t[1])] ^
+ cast_sbox6[U_INT8_Tc(t[1])] ^
+ cast_sbox7[U_INT8_Ta(t[2])] ^
+ cast_sbox8[U_INT8_Tb(t[2])];
+ key->xkey[i+3] = cast_sbox5[U_INT8_Tb(t[1])] ^
+ cast_sbox6[U_INT8_Ta(t[1])] ^
+ cast_sbox7[U_INT8_Tc(t[2])] ^
+ cast_sbox8[U_INT8_Td(t[2])];
break;
}
switch (i & 12) {
- case 0:
+ case 0:
key->xkey[i+0] ^= cast_sbox5[U_INT8_Tc(z[0])];
key->xkey[i+1] ^= cast_sbox6[U_INT8_Tc(z[1])];
key->xkey[i+2] ^= cast_sbox7[U_INT8_Tb(z[2])];
key->xkey[i+3] ^= cast_sbox8[U_INT8_Ta(z[3])];
break;
- case 4:
+ case 4:
key->xkey[i+0] ^= cast_sbox5[U_INT8_Ta(x[2])];
key->xkey[i+1] ^= cast_sbox6[U_INT8_Tb(x[3])];
key->xkey[i+2] ^= cast_sbox7[U_INT8_Td(x[0])];
key->xkey[i+3] ^= cast_sbox8[U_INT8_Td(x[1])];
break;
- case 8:
+ case 8:
key->xkey[i+0] ^= cast_sbox5[U_INT8_Tb(z[2])];
key->xkey[i+1] ^= cast_sbox6[U_INT8_Ta(z[3])];
key->xkey[i+2] ^= cast_sbox7[U_INT8_Tc(z[0])];
key->xkey[i+3] ^= cast_sbox8[U_INT8_Tc(z[1])];
break;
- case 12:
+ case 12:
key->xkey[i+0] ^= cast_sbox5[U_INT8_Td(x[0])];
key->xkey[i+1] ^= cast_sbox6[U_INT8_Td(x[1])];
key->xkey[i+2] ^= cast_sbox7[U_INT8_Ta(x[2])];
@@ -239,4 +274,3 @@ int i;
}
/* Made in Canada */
-