cipher.h

   1 /* $OpenBSD: cipher.h,v 1.56 2023/10/10 06:49:54 tb Exp $ */
   2
   3 /*
   4  * Author: Tatu Ylonen <ylo@cs.hut.fi>
   5  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
   6  *                    All rights reserved
   7  *
   8  * As far as I am concerned, the code I have written for this software
   9  * can be used freely for any purpose.  Any derived versions of this
  10  * software must be clearly marked as such, and if the derived work is
  11  * incompatible with the protocol description in the RFC file, it must be
  12  * called by a name other than "ssh" or "Secure Shell".
  13  *
  14  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  26  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  28  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  34  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #ifndef CIPHER_H
  38 #define CIPHER_H
  39
  40 #include <sys/types.h>
  41 #ifdef WITH_OPENSSL
  42 #include <openssl/evp.h>
  43 #endif
  44 #include "cipher-chachapoly.h"
  45 #include "cipher-aesctr.h"
  46
  47 #define CIPHER_ENCRYPT          1
  48 #define CIPHER_DECRYPT          0
  49
  50 struct sshcipher;
  51 struct sshcipher_ctx;
  52
  53 const struct sshcipher *cipher_by_name(const char *);
  54 const char *cipher_warning_message(const struct sshcipher_ctx *);
  55 int      ciphers_valid(const char *);
  56 char    *cipher_alg_list(char, int);
  57 const char *compression_alg_list(int);
  58 int      cipher_init(struct sshcipher_ctx **, const struct sshcipher *,
  59     const u_char *, u_int, const u_char *, u_int, int);
  60 int      cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
  61     u_int, u_int, u_int);
  62 int      cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
  63     const u_char *, u_int);
  64 void     cipher_free(struct sshcipher_ctx *);
  65 u_int    cipher_blocksize(const struct sshcipher *);
  66 u_int    cipher_keylen(const struct sshcipher *);
  67 u_int    cipher_seclen(const struct sshcipher *);
  68 u_int    cipher_authlen(const struct sshcipher *);
  69 u_int    cipher_ivlen(const struct sshcipher *);
  70 u_int    cipher_is_cbc(const struct sshcipher *);
  71
  72 u_int    cipher_ctx_is_plaintext(struct sshcipher_ctx *);
  73
  74 int      cipher_get_keyiv(struct sshcipher_ctx *, u_char *, size_t);
  75 int      cipher_set_keyiv(struct sshcipher_ctx *, const u_char *, size_t);
  76
  77 #endif                          /* CIPHER_H */