1 files changed, 31 insertions, 6 deletions

diff --git a/cipher.c b/cipher.c
index 8911ffef6..27debf90f 100644
--- a/cipher.c
+++ b/cipher.c
@@ -12,11 +12,11 @@
  */
 
 #include "includes.h"
-RCSID("$Id: cipher.c,v 1.16 2000/04/06 02:32:39 damien Exp $");
+RCSID("$Id: cipher.c,v 1.17 2000/04/12 10:17:39 damien Exp $");
 
 #include "ssh.h"
 #include "cipher.h"
-#include "config.h"
+#include "xmalloc.h"
 
 #ifdef HAVE_OPENSSL
 #include <openssl/md5.h>
@@ -26,7 +26,9 @@ RCSID("$Id: cipher.c,v 1.16 2000/04/06 02:32:39 damien Exp $");
 #endif
 
 /*
- * What kind of tripple DES are these 2 routines?
+ * This is used by SSH1:
+ *
+ * What kind of triple DES are these 2 routines?
  *
  * Why is there a redundant initialization vector?
  *
@@ -81,7 +83,7 @@ SSH_3CBC_DECRYPT(des_key_schedule ks1,
 }
 
 /*
- * SSH uses a variation on Blowfish, all bytes must be swapped before
+ * SSH1 uses a variation on Blowfish, all bytes must be swapped before
  * and after encryption/decryption. Thus the swap_bytes stuff (yuk).
  */
 static void
@@ -167,10 +169,34 @@ cipher_name(int cipher)
 {
         if (cipher < 0 || cipher >= sizeof(cipher_names) / sizeof(cipher_names[0]) ||
             cipher_names[cipher] == NULL)
-                fatal("cipher_name: bad cipher number: %d", cipher);
+                fatal("cipher_name: bad cipher name: %d", cipher);
         return cipher_names[cipher];
 }
 
+/* Returns 1 if the name of the ciphers are valid. */
+
+#define CIPHER_SEP      ","
+int
+ciphers_valid(const char *names)
+{
+        char *ciphers;
+        char *p;
+        int i;
+
+        if (strcmp(names, "") == 0)
+                return 0;
+        ciphers = xstrdup(names);
+        for ((p = strtok(ciphers, CIPHER_SEP)); p; (p = strtok(NULL, CIPHER_SEP))) {
+                i = cipher_number(p);
+                if (i == -1 || !(cipher_mask2() & (1 << i))) {
+                        xfree(ciphers);
+                        return 0;
+                }
+        }
+        xfree(ciphers);
+        return 1;
+}
+
 /*
  * Parses the name of the cipher.  Returns the number of the corresponding
  * cipher, or -1 on error.
@@ -271,7 +297,6 @@ cipher_set_key(CipherContext *context, int cipher, const unsigned char *key,
         memset(padded, 0, sizeof(padded));
 }
 
-
 void 
 cipher_set_key_iv(CipherContext * context, int cipher,
     const unsigned char *key, int keylen,