-} CipherContext;
-/*
- * Returns a bit mask indicating which ciphers are supported by this
- * implementation. The bit mask has the corresponding bit set of each
- * supported cipher.
- */
-unsigned int cipher_mask();
-unsigned int cipher_mask1();
-unsigned int cipher_mask2();
-
-/* Returns the name of the cipher. */
-const char *cipher_name(int cipher);
-
-/*
- * Parses the name of the cipher. Returns the number of the corresponding
- * cipher, or -1 on error.
- */
-int cipher_number(const char *name);
-
-/* returns 1 if all ciphers are supported (ssh2 only) */
-int ciphers_valid(const char *names);
-
-/*
- * Selects the cipher to use and sets the key. If for_encryption is true,
- * the key is setup for encryption; otherwise it is setup for decryption.
- */
-void
-cipher_set_key(CipherContext * context, int cipher,
- const unsigned char *key, int keylen);
-void
-cipher_set_key_iv(CipherContext * context, int cipher,
- const unsigned char *key, int keylen,
- const unsigned char *iv, int ivlen);
-
-/*
- * Sets key for the cipher by computing the MD5 checksum of the passphrase,
- * and using the resulting 16 bytes as the key.
- */
-void
-cipher_set_key_string(CipherContext * context, int cipher,
- const char *passphrase);
-
-/* Encrypts data using the cipher. */
-void
-cipher_encrypt(CipherContext * context, unsigned char *dest,
- const unsigned char *src, unsigned int len);
+ Cipher *cipher;
+};
+struct Cipher {
+ char *name;
+ int number; /* for ssh1 only */
+ u_int block_size;
+ u_int key_len;
+ void (*setkey)(CipherContext *, const u_char *, u_int);
+ void (*setiv)(CipherContext *, const u_char *, u_int);
+ void (*encrypt)(CipherContext *, u_char *, const u_char *, u_int);
+ void (*decrypt)(CipherContext *, u_char *, const u_char *, u_int);
+};