- markus@cvs.openbsd.org 2001/05/28 22:51:11

[cipher.c cipher.h]
     simpler 3des for ssh1

ChangeLog

@@ -62,6 +62,9 @@
    - markus@cvs.openbsd.org 2001/05/28 10:08:55            
      [authfile.c]                                          
      key_load_private: set comment to filename for PEM keys
+   - markus@cvs.openbsd.org 2001/05/28 22:51:11
+     [cipher.c cipher.h]                       
+     simpler 3des for ssh1                     
 
 20010528
  - (tim) [conifgure.in] add setvbuf test needed for sftp-int.c
@@ -5492,4 +5495,4 @@
  - Wrote replacements for strlcpy and mkdtemp
  - Released 1.0pre1
 
-$Id: ChangeLog,v 1.1241 2001/06/05 20:46:32 mouring Exp $
+$Id: ChangeLog,v 1.1242 2001/06/05 20:50:16 mouring Exp $

cipher.c

@@ -35,7 +35,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: cipher.c,v 1.43 2001/02/04 15:32:23 stevesk Exp $");
+RCSID("$OpenBSD: cipher.c,v 1.44 2001/05/28 22:51:10 markus Exp $");
 
 #include "xmalloc.h"
 #include "log.h"
@@ -100,6 +100,7 @@ des3_setkey(CipherContext *cc, const u_char *key, u_int keylen)
 void
 des3_setiv(CipherContext *cc, const u_char *iv, u_int ivlen)
 {
+	memset(cc->u.des3.iv1, 0, sizeof(cc->u.des3.iv1));
 	memset(cc->u.des3.iv2, 0, sizeof(cc->u.des3.iv2));
 	memset(cc->u.des3.iv3, 0, sizeof(cc->u.des3.iv3));
 	if (iv == NULL)
@@ -149,29 +150,23 @@ void
 des3_ssh1_encrypt(CipherContext *cc, u_char *dest, const u_char *src,
     u_int len)
 {
-	des_cblock iv1;
-	des_cblock *iv2 = &cc->u.des3.iv2;
-	des_cblock *iv3 = &cc->u.des3.iv3;
-
-	memcpy(&iv1, iv2, 8);
-
-	des_ncbc_encrypt(src,  dest, len, cc->u.des3.key1, &iv1, DES_ENCRYPT);
-	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key2, iv2, DES_DECRYPT);
-	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key3, iv3, DES_ENCRYPT);
+	des_ncbc_encrypt(src,  dest, len, cc->u.des3.key1, &cc->u.des3.iv1,
+	    DES_ENCRYPT);
+	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key2, &cc->u.des3.iv2,
+	    DES_DECRYPT);
+	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key3, &cc->u.des3.iv3,
+	    DES_ENCRYPT);
 }
 void
 des3_ssh1_decrypt(CipherContext *cc, u_char *dest, const u_char *src,
     u_int len)
 {
-	des_cblock iv1;
-	des_cblock *iv2 = &cc->u.des3.iv2;
-	des_cblock *iv3 = &cc->u.des3.iv3;
-
-	memcpy(&iv1, iv2, 8);
-
-	des_ncbc_encrypt(src,  dest, len, cc->u.des3.key3, iv3, DES_DECRYPT);
-	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key2, iv2, DES_ENCRYPT);
-	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key1, &iv1, DES_DECRYPT);
+	des_ncbc_encrypt(src,  dest, len, cc->u.des3.key3, &cc->u.des3.iv3,
+	    DES_DECRYPT);
+	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key2, &cc->u.des3.iv2,
+	    DES_ENCRYPT);
+	des_ncbc_encrypt(dest, dest, len, cc->u.des3.key1, &cc->u.des3.iv1,
+	    DES_DECRYPT);
 }
 
 /* Blowfish */

cipher.h

@@ -32,7 +32,7 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/* RCSID("$OpenBSD: cipher.h,v 1.25 2000/12/19 23:17:56 markus Exp $"); */
+/* RCSID("$OpenBSD: cipher.h,v 1.26 2001/05/28 22:51:11 markus Exp $"); */
 
 #ifndef CIPHER_H
 #define CIPHER_H
@@ -71,8 +71,9 @@ struct CipherContext {
 		struct {
 			des_key_schedule key1;
 			des_key_schedule key2;
-			des_cblock iv2;
 			des_key_schedule key3;
+			des_cblock iv1;
+			des_cblock iv2;
 			des_cblock iv3;
 		}       des3;
 		struct {