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authorBen Lindstrom <mouring@eviladmin.org>2000-12-07 05:57:27 +0000
committerBen Lindstrom <mouring@eviladmin.org>2000-12-07 05:57:27 +0000
commit01f8463b15ead597f8ecf0052fd7569240dcaab9 (patch)
tree73ab1f33ee4c21041c160a93ff30e47c8179512b /cipher.c
parenta14ee47f2eee3030cd784b93985a4de417a4b14c (diff)
- markus@cvs.openbsd.org 2000/12/06 23:10:39
[rijndael.c] unexpand(1) - markus@cvs.openbsd.org 2000/12/06 23:05:43 [cipher.c cipher.h rijndael.c rijndael.h rijndael_boxes.h] new rijndael implementation. fixes endian bugs
Diffstat (limited to 'cipher.c')
-rw-r--r--cipher.c67
1 files changed, 36 insertions, 31 deletions
diff --git a/cipher.c b/cipher.c
index f9091453..46ca830e 100644
--- a/cipher.c
+++ b/cipher.c
@@ -35,7 +35,7 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: cipher.c,v 1.38 2000/11/29 20:39:17 markus Exp $");
+RCSID("$OpenBSD: cipher.c,v 1.39 2000/12/06 23:05:42 markus Exp $");
#include "ssh.h"
#include "xmalloc.h"
@@ -285,40 +285,45 @@ cast_cbc_decrypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
/* RIJNDAEL */
#define RIJNDAEL_BLOCKSIZE 16
+
void
rijndael_setkey(CipherContext *cc, const u_char *key, u_int keylen)
{
- rijndael_set_key(&cc->u.rijndael.enc, (u4byte *)key, 8*keylen, 1);
- rijndael_set_key(&cc->u.rijndael.dec, (u4byte *)key, 8*keylen, 0);
+ if (rijndael_makekey(&cc->u.rijndael.enc, RIJNDAEL_ENCRYPT,
+ 8*keylen, (char *)key) == -1)
+ fatal("rijndael_setkey: RIJNDAEL_ENCRYPT");
+ if (rijndael_makekey(&cc->u.rijndael.dec, RIJNDAEL_DECRYPT,
+ 8*keylen, (char *)key) == -1)
+ fatal("rijndael_setkey: RIJNDAEL_DECRYPT");
}
void
rijndael_setiv(CipherContext *cc, const u_char *iv, u_int ivlen)
{
- if (iv == NULL)
- fatal("no IV for %s.", cc->cipher->name);
- memcpy((u_char *)cc->u.rijndael.iv, iv, RIJNDAEL_BLOCKSIZE);
+ if (iv == NULL || ivlen != RIJNDAEL_BLOCKSIZE)
+ fatal("bad/no IV for %s.", cc->cipher->name);
+ memcpy(cc->u.rijndael.iv, iv, RIJNDAEL_BLOCKSIZE);
}
+
void
rijndael_cbc_encrypt(CipherContext *cc, u_char *dest, const u_char *src,
u_int len)
{
- rijndael_ctx *ctx = &cc->u.rijndael.enc;
- u4byte *iv = cc->u.rijndael.iv;
- u4byte in[4];
- u4byte *cprev, *cnow, *plain;
- int i, blocks = len / RIJNDAEL_BLOCKSIZE;
+ rijndael_key *ctx = &cc->u.rijndael.enc;
+ u_char *iv = cc->u.rijndael.iv;
+ u_char in[RIJNDAEL_BLOCKSIZE];
+ u_char *cprev, *cnow, *plain;
+ int i, j, blocks = len / RIJNDAEL_BLOCKSIZE;
if (len == 0)
return;
if (len % RIJNDAEL_BLOCKSIZE)
fatal("rijndael_cbc_encrypt: bad len %d", len);
- cnow = (u4byte*) dest;
- plain = (u4byte*) src;
+ cnow = dest;
+ plain = (u_char *) src;
cprev = iv;
- for(i = 0; i < blocks; i++, plain+=4, cnow+=4) {
- in[0] = plain[0] ^ cprev[0];
- in[1] = plain[1] ^ cprev[1];
- in[2] = plain[2] ^ cprev[2];
- in[3] = plain[3] ^ cprev[3];
+ for(i = 0; i < blocks; i++, plain+=RIJNDAEL_BLOCKSIZE,
+ cnow+=RIJNDAEL_BLOCKSIZE) {
+ for (j = 0; j < RIJNDAEL_BLOCKSIZE; j++)
+ in[j] = plain[j] ^ cprev[j];
rijndael_encrypt(ctx, in, cnow);
cprev = cnow;
}
@@ -329,25 +334,25 @@ void
rijndael_cbc_decrypt(CipherContext *cc, u_char *dest, const u_char *src,
u_int len)
{
- rijndael_ctx *ctx = &cc->u.rijndael.dec;
- u4byte *iv = cc->u.rijndael.iv;
- u4byte ivsaved[4];
- u4byte *cnow = (u4byte*) (src+len-RIJNDAEL_BLOCKSIZE);
- u4byte *plain = (u4byte*) (dest+len-RIJNDAEL_BLOCKSIZE);
- u4byte *ivp;
- int i, blocks = len / RIJNDAEL_BLOCKSIZE;
+ rijndael_key *ctx = &cc->u.rijndael.dec;
+ u_char *iv = cc->u.rijndael.iv;
+ u_char ivsaved[RIJNDAEL_BLOCKSIZE];
+ u_char *cnow = (u_char *) (src+len-RIJNDAEL_BLOCKSIZE);
+ u_char *plain = dest+len-RIJNDAEL_BLOCKSIZE;
+ u_char *ivp;
+ int i, j, blocks = len / RIJNDAEL_BLOCKSIZE;
if (len == 0)
return;
if (len % RIJNDAEL_BLOCKSIZE)
fatal("rijndael_cbc_decrypt: bad len %d", len);
memcpy(ivsaved, cnow, RIJNDAEL_BLOCKSIZE);
- for(i = blocks; i > 0; i--, cnow-=4, plain-=4) {
+ for(i = blocks; i > 0; i--, cnow-=RIJNDAEL_BLOCKSIZE,
+ plain-=RIJNDAEL_BLOCKSIZE) {
rijndael_decrypt(ctx, cnow, plain);
- ivp = (i == 1) ? iv : cnow-4;
- plain[0] ^= ivp[0];
- plain[1] ^= ivp[1];
- plain[2] ^= ivp[2];
- plain[3] ^= ivp[3];
+ //rijndael_decrypt(cnow, plain, ctx->keySched, ctx->ROUNDS);
+ ivp = (i == 1) ? iv : cnow-RIJNDAEL_BLOCKSIZE;
+ for (j = 0; j < RIJNDAEL_BLOCKSIZE; j++)
+ plain[j] ^= ivp[j];
}
memcpy(iv, ivsaved, RIJNDAEL_BLOCKSIZE);
}