+/* $OpenBSD: cipher.h,v 1.37 2009/01/26 09:58:15 markus Exp $ */
+
/*
- *
- * cipher.h
- *
* Author: Tatu Ylonen <ylo@cs.hut.fi>
- *
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
- *
- * Created: Wed Apr 19 16:50:42 1995 ylo
- *
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ *
+ * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* RCSID("$Id$"); */
-
#ifndef CIPHER_H
#define CIPHER_H
-#include "config.h"
-
-#ifdef HAVE_OPENSSL
-#include <openssl/des.h>
-#include <openssl/blowfish.h>
-#include <openssl/rc4.h>
-#include <openssl/cast.h>
-#endif
-#ifdef HAVE_SSL
-#include <ssl/des.h>
-#include <ssl/blowfish.h>
-#include <ssl/rc4.h>
-#include <ssl/cast.h>
-#endif
-
-/* Cipher types. New types can be added, but old types should not be removed
- for compatibility. The maximum allowed value is 31. */
+#include <openssl/evp.h>
+/*
+ * Cipher types for SSH-1. New types can be added, but old types should not
+ * be removed for compatibility. The maximum allowed value is 31.
+ */
+#define SSH_CIPHER_SSH2 -3
+#define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */
#define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
#define SSH_CIPHER_NONE 0 /* no encryption */
#define SSH_CIPHER_IDEA 1 /* IDEA CFB */
#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
#define SSH_CIPHER_BLOWFISH 6
#define SSH_CIPHER_RESERVED 7
+#define SSH_CIPHER_MAX 31
-/* these ciphers are used in SSH2: */
-#define SSH_CIPHER_BLOWFISH_CBC 8
-#define SSH_CIPHER_3DES_CBC 9
-#define SSH_CIPHER_ARCFOUR 10 /* Alleged RC4 */
-#define SSH_CIPHER_CAST128_CBC 11
-
-typedef struct {
- unsigned int type;
- union {
- struct {
- des_key_schedule key1;
- des_key_schedule key2;
- des_cblock iv2;
- des_key_schedule key3;
- des_cblock iv3;
- } des3;
- struct {
- struct bf_key_st key;
- unsigned char iv[8];
- } bf;
- struct {
- CAST_KEY key;
- unsigned char iv[8];
- } cast;
- RC4_KEY rc4;
- } u;
-} 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);
+#define CIPHER_ENCRYPT 1
+#define CIPHER_DECRYPT 0
-/*
- * 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);
+typedef struct Cipher Cipher;
+typedef struct CipherContext CipherContext;
-/* Encrypts data using the cipher. */
-void
-cipher_encrypt(CipherContext * context, unsigned char *dest,
- const unsigned char *src, unsigned int len);
+struct Cipher;
+struct CipherContext {
+ int plaintext;
+ EVP_CIPHER_CTX evp;
+ Cipher *cipher;
+};
-/* Decrypts data using the cipher. */
-void
-cipher_decrypt(CipherContext * context, unsigned char *dest,
- const unsigned char *src, unsigned int len);
+u_int cipher_mask_ssh1(int);
+Cipher *cipher_by_name(const char *);
+Cipher *cipher_by_number(int);
+int cipher_number(const char *);
+char *cipher_name(int);
+int ciphers_valid(const char *);
+void cipher_init(CipherContext *, Cipher *, const u_char *, u_int,
+ const u_char *, u_int, int);
+void cipher_crypt(CipherContext *, u_char *, const u_char *, u_int);
+void cipher_cleanup(CipherContext *);
+void cipher_set_key_string(CipherContext *, Cipher *, const char *, int);
+u_int cipher_blocksize(const Cipher *);
+u_int cipher_keylen(const Cipher *);
+u_int cipher_is_cbc(const Cipher *);
+u_int cipher_get_number(const Cipher *);
+void cipher_get_keyiv(CipherContext *, u_char *, u_int);
+void cipher_set_keyiv(CipherContext *, u_char *);
+int cipher_get_keyiv_len(const CipherContext *);
+int cipher_get_keycontext(const CipherContext *, u_char *);
+void cipher_set_keycontext(CipherContext *, u_char *);
#endif /* CIPHER_H */
andersk / openssh.git / blobdiff