- (djm) Add Markus' patch for compat wih OpenSSL < 0.9.6.

   Known issue: Blowfish for SSH1 does not work

1 files changed, 43 insertions, 0 deletions

diff --git a/cipher.c b/cipher.c
index ce3f6f3ce..9e8f42f5e 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);
 }