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openntpd-openbsd
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knf, no binary change 

ok krw@ millert@
OPENBSD_3_7
hshoexer 20 years ago
parent
df2265ded1
commit
b4bc6e4e69
1 changed files with 65 additions and 54 deletions
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  1. +65
    -54
      src/lib/libc/crypt/cast.c

+ 65
- 54
src/lib/libc/crypt/cast.c View File

@ -1,4 +1,4 @@
/* $OpenBSD: cast.c,v 1.2 1998/07/21 22:42:03 provos Exp $ */
/* $OpenBSD: cast.c,v 1.3 2004/11/03 10:38:50 hshoexer Exp $ */
/* /*
* CAST-128 in C * CAST-128 in C
* Written by Steve Reid <sreid@sea-to-sky.net> * Written by Steve Reid <sreid@sea-to-sky.net>
@ -574,15 +574,16 @@ static const u_int32_t cast_sbox8[256] = {
/***** Encryption Function *****/ /***** 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 */ /* Get inblock into l,r */
l = ((u_int32_t)inblock[0] << 24) | ((u_int32_t)inblock[1] << 16) | 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) | 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 */ /* Do the work */
F1(l, r, 0); F1(l, r, 0);
F2(r, l, 1); F2(r, l, 1);
@ -619,15 +620,16 @@ u_int32_t t, l, r;
/***** Decryption Function *****/ /***** 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 */ /* Get inblock into l,r */
r = ((u_int32_t)inblock[0] << 24) | ((u_int32_t)inblock[1] << 16) | 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) | 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 */ /* Do the work */
/* Only do full 16 rounds if key length > 80 bits */ /* Only do full 16 rounds if key length > 80 bits */
if (key->rounds > 12) { if (key->rounds > 12) {
@ -664,10 +666,11 @@ u_int32_t t, l, r;
/***** Key Schedual *****/ /***** Key Schedual *****/
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 */ /* Set number of rounds to 12 or 16, depending on key length */
key->rounds = (keybytes <= 10 ? 12 : 16); key->rounds = (keybytes <= 10 ? 12 : 16);
@ -683,79 +686,87 @@ int i;
/* Generate 32 subkeys, four at a time */ /* Generate 32 subkeys, four at a time */
for (i = 0; i < 32; i+=4) { for (i = 0; i < 32; i+=4) {
switch (i & 4) { switch (i & 4) {
case 0:
case 0:
t[0] = z[0] = x[0] ^ cast_sbox5[U8b(x[3])] ^ t[0] = z[0] = x[0] ^ cast_sbox5[U8b(x[3])] ^
cast_sbox6[U8d(x[3])] ^ cast_sbox7[U8a(x[3])] ^
cast_sbox8[U8c(x[3])] ^ cast_sbox7[U8a(x[2])];
cast_sbox6[U8d(x[3])] ^ cast_sbox7[U8a(x[3])] ^
cast_sbox8[U8c(x[3])] ^ cast_sbox7[U8a(x[2])];
t[1] = z[1] = x[2] ^ cast_sbox5[U8a(z[0])] ^ t[1] = z[1] = x[2] ^ cast_sbox5[U8a(z[0])] ^
cast_sbox6[U8c(z[0])] ^ cast_sbox7[U8b(z[0])] ^
cast_sbox8[U8d(z[0])] ^ cast_sbox8[U8c(x[2])];
cast_sbox6[U8c(z[0])] ^ cast_sbox7[U8b(z[0])] ^
cast_sbox8[U8d(z[0])] ^ cast_sbox8[U8c(x[2])];
t[2] = z[2] = x[3] ^ cast_sbox5[U8d(z[1])] ^ t[2] = z[2] = x[3] ^ cast_sbox5[U8d(z[1])] ^
cast_sbox6[U8c(z[1])] ^ cast_sbox7[U8b(z[1])] ^
cast_sbox8[U8a(z[1])] ^ cast_sbox5[U8b(x[2])];
cast_sbox6[U8c(z[1])] ^ cast_sbox7[U8b(z[1])] ^
cast_sbox8[U8a(z[1])] ^ cast_sbox5[U8b(x[2])];
t[3] = z[3] = x[1] ^ cast_sbox5[U8c(z[2])] ^ t[3] = z[3] = x[1] ^ cast_sbox5[U8c(z[2])] ^
cast_sbox6[U8b(z[2])] ^ cast_sbox7[U8d(z[2])] ^
cast_sbox8[U8a(z[2])] ^ cast_sbox6[U8d(x[2])];
cast_sbox6[U8b(z[2])] ^ cast_sbox7[U8d(z[2])] ^
cast_sbox8[U8a(z[2])] ^ cast_sbox6[U8d(x[2])];
break; break;
case 4:
case 4:
t[0] = x[0] = z[2] ^ cast_sbox5[U8b(z[1])] ^ t[0] = x[0] = z[2] ^ cast_sbox5[U8b(z[1])] ^
cast_sbox6[U8d(z[1])] ^ cast_sbox7[U8a(z[1])] ^
cast_sbox8[U8c(z[1])] ^ cast_sbox7[U8a(z[0])];
cast_sbox6[U8d(z[1])] ^ cast_sbox7[U8a(z[1])] ^
cast_sbox8[U8c(z[1])] ^ cast_sbox7[U8a(z[0])];
t[1] = x[1] = z[0] ^ cast_sbox5[U8a(x[0])] ^ t[1] = x[1] = z[0] ^ cast_sbox5[U8a(x[0])] ^
cast_sbox6[U8c(x[0])] ^ cast_sbox7[U8b(x[0])] ^
cast_sbox8[U8d(x[0])] ^ cast_sbox8[U8c(z[0])];
cast_sbox6[U8c(x[0])] ^ cast_sbox7[U8b(x[0])] ^
cast_sbox8[U8d(x[0])] ^ cast_sbox8[U8c(z[0])];
t[2] = x[2] = z[1] ^ cast_sbox5[U8d(x[1])] ^ t[2] = x[2] = z[1] ^ cast_sbox5[U8d(x[1])] ^
cast_sbox6[U8c(x[1])] ^ cast_sbox7[U8b(x[1])] ^
cast_sbox8[U8a(x[1])] ^ cast_sbox5[U8b(z[0])];
cast_sbox6[U8c(x[1])] ^ cast_sbox7[U8b(x[1])] ^
cast_sbox8[U8a(x[1])] ^ cast_sbox5[U8b(z[0])];
t[3] = x[3] = z[3] ^ cast_sbox5[U8c(x[2])] ^ t[3] = x[3] = z[3] ^ cast_sbox5[U8c(x[2])] ^
cast_sbox6[U8b(x[2])] ^ cast_sbox7[U8d(x[2])] ^
cast_sbox8[U8a(x[2])] ^ cast_sbox6[U8d(z[0])];
cast_sbox6[U8b(x[2])] ^ cast_sbox7[U8d(x[2])] ^
cast_sbox8[U8a(x[2])] ^ cast_sbox6[U8d(z[0])];
break; break;
} }
switch (i & 12) { switch (i & 12) {
case 0:
case 12:
key->xkey[i+0] = cast_sbox5[U8a(t[2])] ^ cast_sbox6[U8b(t[2])] ^
cast_sbox7[U8d(t[1])] ^ cast_sbox8[U8c(t[1])];
key->xkey[i+1] = cast_sbox5[U8c(t[2])] ^ cast_sbox6[U8d(t[2])] ^
cast_sbox7[U8b(t[1])] ^ cast_sbox8[U8a(t[1])];
key->xkey[i+2] = cast_sbox5[U8a(t[3])] ^ cast_sbox6[U8b(t[3])] ^
cast_sbox7[U8d(t[0])] ^ cast_sbox8[U8c(t[0])];
key->xkey[i+3] = cast_sbox5[U8c(t[3])] ^ cast_sbox6[U8d(t[3])] ^
cast_sbox7[U8b(t[0])] ^ cast_sbox8[U8a(t[0])];
case 0:
case 12:
key->xkey[i+0] = cast_sbox5[U8a(t[2])] ^
cast_sbox6[U8b(t[2])] ^ cast_sbox7[U8d(t[1])] ^
cast_sbox8[U8c(t[1])];
key->xkey[i+1] = cast_sbox5[U8c(t[2])] ^
cast_sbox6[U8d(t[2])] ^ cast_sbox7[U8b(t[1])] ^
cast_sbox8[U8a(t[1])];
key->xkey[i+2] = cast_sbox5[U8a(t[3])] ^
cast_sbox6[U8b(t[3])] ^ cast_sbox7[U8d(t[0])] ^
cast_sbox8[U8c(t[0])];
key->xkey[i+3] = cast_sbox5[U8c(t[3])] ^
cast_sbox6[U8d(t[3])] ^ cast_sbox7[U8b(t[0])] ^
cast_sbox8[U8a(t[0])];
break; break;
case 4:
case 8:
key->xkey[i+0] = cast_sbox5[U8d(t[0])] ^ cast_sbox6[U8c(t[0])] ^
cast_sbox7[U8a(t[3])] ^ cast_sbox8[U8b(t[3])];
key->xkey[i+1] = cast_sbox5[U8b(t[0])] ^ cast_sbox6[U8a(t[0])] ^
cast_sbox7[U8c(t[3])] ^ cast_sbox8[U8d(t[3])];
key->xkey[i+2] = cast_sbox5[U8d(t[1])] ^ cast_sbox6[U8c(t[1])] ^
cast_sbox7[U8a(t[2])] ^ cast_sbox8[U8b(t[2])];
key->xkey[i+3] = cast_sbox5[U8b(t[1])] ^ cast_sbox6[U8a(t[1])] ^
cast_sbox7[U8c(t[2])] ^ cast_sbox8[U8d(t[2])];
case 4:
case 8:
key->xkey[i+0] = cast_sbox5[U8d(t[0])] ^
cast_sbox6[U8c(t[0])] ^ cast_sbox7[U8a(t[3])] ^
cast_sbox8[U8b(t[3])];
key->xkey[i+1] = cast_sbox5[U8b(t[0])] ^
cast_sbox6[U8a(t[0])] ^ cast_sbox7[U8c(t[3])] ^
cast_sbox8[U8d(t[3])];
key->xkey[i+2] = cast_sbox5[U8d(t[1])] ^
cast_sbox6[U8c(t[1])] ^ cast_sbox7[U8a(t[2])] ^
cast_sbox8[U8b(t[2])];
key->xkey[i+3] = cast_sbox5[U8b(t[1])] ^
cast_sbox6[U8a(t[1])] ^ cast_sbox7[U8c(t[2])] ^
cast_sbox8[U8d(t[2])];
break; break;
} }
switch (i & 12) { switch (i & 12) {
case 0:
case 0:
key->xkey[i+0] ^= cast_sbox5[U8c(z[0])]; key->xkey[i+0] ^= cast_sbox5[U8c(z[0])];
key->xkey[i+1] ^= cast_sbox6[U8c(z[1])]; key->xkey[i+1] ^= cast_sbox6[U8c(z[1])];
key->xkey[i+2] ^= cast_sbox7[U8b(z[2])]; key->xkey[i+2] ^= cast_sbox7[U8b(z[2])];
key->xkey[i+3] ^= cast_sbox8[U8a(z[3])]; key->xkey[i+3] ^= cast_sbox8[U8a(z[3])];
break; break;
case 4:
case 4:
key->xkey[i+0] ^= cast_sbox5[U8a(x[2])]; key->xkey[i+0] ^= cast_sbox5[U8a(x[2])];
key->xkey[i+1] ^= cast_sbox6[U8b(x[3])]; key->xkey[i+1] ^= cast_sbox6[U8b(x[3])];
key->xkey[i+2] ^= cast_sbox7[U8d(x[0])]; key->xkey[i+2] ^= cast_sbox7[U8d(x[0])];
key->xkey[i+3] ^= cast_sbox8[U8d(x[1])]; key->xkey[i+3] ^= cast_sbox8[U8d(x[1])];
break; break;
case 8:
case 8:
key->xkey[i+0] ^= cast_sbox5[U8b(z[2])]; key->xkey[i+0] ^= cast_sbox5[U8b(z[2])];
key->xkey[i+1] ^= cast_sbox6[U8a(z[3])]; key->xkey[i+1] ^= cast_sbox6[U8a(z[3])];
key->xkey[i+2] ^= cast_sbox7[U8c(z[0])]; key->xkey[i+2] ^= cast_sbox7[U8c(z[0])];
key->xkey[i+3] ^= cast_sbox8[U8c(z[1])]; key->xkey[i+3] ^= cast_sbox8[U8c(z[1])];
break; break;
case 12:
case 12:
key->xkey[i+0] ^= cast_sbox5[U8d(x[0])]; key->xkey[i+0] ^= cast_sbox5[U8d(x[0])];
key->xkey[i+1] ^= cast_sbox6[U8d(x[1])]; key->xkey[i+1] ^= cast_sbox6[U8d(x[1])];
key->xkey[i+2] ^= cast_sbox7[U8a(x[2])]; key->xkey[i+2] ^= cast_sbox7[U8a(x[2])];


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