From a068d86f044aaf4cacc5fc074ed07d386a78f0e8 Mon Sep 17 00:00:00 2001
From: djm <djm>
Date: Sun, 10 Mar 2002 23:51:17 +0000
Subject: [PATCH]  - (djm) Add Markus' patch for compat wih OpenSSL < 0.9.6.   
 Known issue: Blowfish for SSH1 does not work

---
 ChangeLog |  6 ++++--
 cipher.c  | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index cc5d585c..93e74717 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,8 @@
 20020308
- - (djm) Revert bits of Markus' OpenSSL compat patch which was accidentally
-   committed.
+ - (djm) Revert bits of Markus' OpenSSL compat patch which was 
+   accidentally committed.
+ - (djm) Add Markus' patch for compat wih OpenSSL < 0.9.6. 
+   Known issue: Blowfish for SSH1 does not work
 
 20020307
  - (djm) OpenBSD CVS Sync
diff --git a/cipher.c b/cipher.c
index ce3f6f3c..9e8f42f5 100644
--- a/cipher.c
+++ b/cipher.c
@@ -44,6 +44,11 @@ RCSID("$OpenBSD: cipher.c,v 1.52 2002/02/18 13:05:32 markus Exp $");
 #include <openssl/md5.h>
 #include "rijndael.h"
 
+#if OPENSSL_VERSION_NUMBER < 0x00906000L
+#define SSH_OLD_EVP
+#define EVP_CIPHER_CTX_get_app_data(e)          ((e)->app_data)
+#endif
+
 static EVP_CIPHER *evp_ssh1_3des(void);
 static EVP_CIPHER *evp_ssh1_bf(void);
 static EVP_CIPHER *evp_rijndael(void);
@@ -171,7 +176,11 @@ cipher_init(CipherContext *cc, Cipher *cipher,
     int encrypt)
 {
 	static int dowarn = 1;
+#ifdef SSH_OLD_EVP
+	EVP_CIPHER *type;
+#else
 	const EVP_CIPHER *type;
+#endif
 	int klen;
 
 	if (cipher->number == SSH_CIPHER_DES) {
@@ -196,6 +205,15 @@ cipher_init(CipherContext *cc, Cipher *cipher,
 	type = (*cipher->evptype)();
 
 	EVP_CIPHER_CTX_init(&cc->evp);
+#ifdef SSH_OLD_EVP
+	if (type->key_len > 0 && type->key_len != keylen) {
+		debug("cipher_init: set keylen (%d -> %d)",
+		    type->key_len, keylen);
+		type->key_len = keylen;
+	}
+	EVP_CipherInit(&cc->evp, type, (u_char *)key, (u_char *)iv,
+	    (encrypt == CIPHER_ENCRYPT));
+#else
 	if (EVP_CipherInit(&cc->evp, type, NULL, (u_char *)iv,
 	    (encrypt == CIPHER_ENCRYPT)) == 0)
 		fatal("cipher_init: EVP_CipherInit failed for %s",
@@ -210,6 +228,7 @@ cipher_init(CipherContext *cc, Cipher *cipher,
 	if (EVP_CipherInit(&cc->evp, NULL, (u_char *)key, NULL, -1) == 0)
 		fatal("cipher_init: EVP_CipherInit: set key failed for %s",
 		    cipher->name);
+#endif
 }
 
 void
@@ -217,15 +236,23 @@ cipher_crypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
 {
 	if (len % cc->cipher->block_size)
 		fatal("cipher_encrypt: bad plaintext length %d", len);
+#ifdef SSH_OLD_EVP
+	EVP_Cipher(&cc->evp, dest, (u_char *)src, len);
+#else
 	if (EVP_Cipher(&cc->evp, dest, (u_char *)src, len) == 0)
 		fatal("evp_crypt: EVP_Cipher failed");
+#endif
 }
 
 void
 cipher_cleanup(CipherContext *cc)
 {
+#ifdef SSH_OLD_EVP
+	EVP_CIPHER_CTX_cleanup(&cc->evp);
+#else
 	if (EVP_CIPHER_CTX_cleanup(&cc->evp) == 0)
 		error("cipher_cleanup: EVP_CIPHER_CTX_cleanup failed");
+#endif
 }
 
 /*
@@ -296,6 +323,11 @@ ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv,
 	EVP_CIPHER_CTX_init(&c->k1);
 	EVP_CIPHER_CTX_init(&c->k2);
 	EVP_CIPHER_CTX_init(&c->k3);
+#ifdef SSH_OLD_EVP
+	EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc);
+	EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc);
+	EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc);
+#else
 	if (EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc) == 0 ||
 	    EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc) == 0 ||
 	    EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc) == 0) {
@@ -304,6 +336,7 @@ ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv,
 		EVP_CIPHER_CTX_set_app_data(ctx, NULL);
 		return (0);
 	}
+#endif
 	return (1);
 }
 static int
@@ -315,10 +348,16 @@ ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, u_int len)
 		error("ssh1_3des_cbc: no context");
 		return (0);
 	}
+#ifdef SSH_OLD_EVP
+	EVP_Cipher(&c->k1, dest, (u_char *)src, len);
+	EVP_Cipher(&c->k2, dest, dest, len);
+	EVP_Cipher(&c->k3, dest, dest, len);
+#else
 	if (EVP_Cipher(&c->k1, dest, (u_char *)src, len) == 0 ||
 	    EVP_Cipher(&c->k2, dest, dest, len) == 0 ||
 	    EVP_Cipher(&c->k3, dest, dest, len) == 0)
 		return (0);
+#endif
 	return (1);
 }
 static int
@@ -346,7 +385,9 @@ evp_ssh1_3des(void)
 	ssh1_3des.init = ssh1_3des_init;
 	ssh1_3des.cleanup = ssh1_3des_cleanup;
 	ssh1_3des.do_cipher = ssh1_3des_cbc;
+#ifndef SSH_OLD_EVP
 	ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH;
+#endif
 	return (&ssh1_3des);
 }
 
@@ -494,7 +535,9 @@ evp_rijndael(void)
 	rijndal_cbc.init = ssh_rijndael_init;
 	rijndal_cbc.cleanup = ssh_rijndael_cleanup;
 	rijndal_cbc.do_cipher = ssh_rijndael_cbc;
+#ifndef SSH_OLD_EVP
 	rijndal_cbc.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH |
 	    EVP_CIPH_ALWAYS_CALL_INIT;
+#endif
 	return (&rijndal_cbc);
 }
-- 
2.45.1