usr/src/cmd/ssh/include/cipher.h

   1 /*      $OpenBSD: cipher.h,v 1.33 2002/03/18 17:13:15 markus Exp $      */
   2
   3 #ifndef _CIPHER_H
   4 #define _CIPHER_H
   5
   6 #pragma ident   "%Z%%M% %I%     %E% SMI"
   7
   8 #ifdef __cplusplus
   9 extern "C" {
  10 #endif
  11
  12
  13 /*
  14  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  15  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  16  *                    All rights reserved
  17  *
  18  * As far as I am concerned, the code I have written for this software
  19  * can be used freely for any purpose.  Any derived versions of this
  20  * software must be clearly marked as such, and if the derived work is
  21  * incompatible with the protocol description in the RFC file, it must be
  22  * called by a name other than "ssh" or "Secure Shell".
  23  *
  24  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  36  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  37  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  38  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  39  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  40  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  44  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  */
  46
  47 #include <openssl/evp.h>
  48 /*
  49  * Cipher types for SSH-1.  New types can be added, but old types should not
  50  * be removed for compatibility.  The maximum allowed value is 31.
  51  */
  52 #define SSH_CIPHER_SSH2         -3
  53 #define SSH_CIPHER_ILLEGAL      -2      /* No valid cipher selected. */
  54 #define SSH_CIPHER_NOT_SET      -1      /* None selected (invalid number). */
  55 #define SSH_CIPHER_NONE         0       /* no encryption */
  56 #define SSH_CIPHER_IDEA         1       /* IDEA CFB */
  57 #define SSH_CIPHER_DES          2       /* DES CBC */
  58 #define SSH_CIPHER_3DES         3       /* 3DES CBC */
  59 #define SSH_CIPHER_BROKEN_TSS   4       /* TRI's Simple Stream encryption CBC */
  60 #define SSH_CIPHER_BROKEN_RC4   5       /* Alleged RC4 */
  61 #define SSH_CIPHER_BLOWFISH     6
  62 #define SSH_CIPHER_RESERVED     7
  63 #define SSH_CIPHER_MAX          31
  64
  65 #define CIPHER_ENCRYPT          1
  66 #define CIPHER_DECRYPT          0
  67
  68 typedef struct Cipher Cipher;
  69 typedef struct CipherContext CipherContext;
  70
  71 struct Cipher;
  72 struct CipherContext {
  73         int     plaintext;
  74         EVP_CIPHER_CTX evp;
  75         Cipher *cipher;
  76 };
  77
  78 u_int    cipher_mask_ssh1(int);
  79 Cipher  *cipher_by_name(const char *);
  80 Cipher  *cipher_by_number(int);
  81 int      cipher_number(const char *);
  82 char    *cipher_name(int);
  83 int      ciphers_valid(const char *);
  84 void     cipher_init(CipherContext *, Cipher *, const u_char *, u_int,
  85     const u_char *, u_int, int);
  86 void     cipher_crypt(CipherContext *, u_char *, const u_char *, u_int);
  87 void     cipher_cleanup(CipherContext *);
  88 void     cipher_set_key_string(CipherContext *, Cipher *, const char *, int);
  89 u_int    cipher_blocksize(Cipher *);
  90 u_int    cipher_keylen(Cipher *);
  91
  92 u_int    cipher_get_number(Cipher *);
  93 void     cipher_get_keyiv(CipherContext *, u_char *, u_int);
  94 void     cipher_set_keyiv(CipherContext *, u_char *);
  95 int      cipher_get_keyiv_len(CipherContext *);
  96 int      cipher_get_keycontext(CipherContext *, u_char *);
  97 void     cipher_set_keycontext(CipherContext *, u_char *);
  98
  99 #ifdef __cplusplus
 100 }
 101 #endif
 102
 103 #endif /* _CIPHER_H */