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Diff for /src/usr.bin/ssh/cipher.h between version 1.17.2.1 and 1.17.2.2

version 1.17.2.1, 2000/09/01 18:23:18 version 1.17.2.2, 2000/11/08 21:30:35
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 /*  /*
  *  
  * cipher.h  
  *  
  * Author: Tatu Ylonen <ylo@cs.hut.fi>   * Author: Tatu Ylonen <ylo@cs.hut.fi>
  *  
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland   * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved   *                    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("$OpenBSD$"); */  /* RCSID("$OpenBSD$"); */
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 #include <openssl/blowfish.h>  #include <openssl/blowfish.h>
 #include <openssl/rc4.h>  #include <openssl/rc4.h>
 #include <openssl/cast.h>  #include <openssl/cast.h>
   #include "rijndael.h"
 /* Cipher types.  New types can be added, but old types should not be removed  /*
    for compatibility.  The maximum allowed value is 31. */   * 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_ILLEGAL      -2      /* No valid cipher selected. */  #define SSH_CIPHER_ILLEGAL      -2      /* No valid cipher selected. */
 #define SSH_CIPHER_NOT_SET      -1      /* None selected (invalid number). */  #define SSH_CIPHER_NOT_SET      -1      /* None selected (invalid number). */
 #define SSH_CIPHER_NONE         0       /* no encryption */  #define SSH_CIPHER_NONE         0       /* no encryption */
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 #define SSH_CIPHER_BROKEN_RC4   5       /* Alleged RC4 */  #define SSH_CIPHER_BROKEN_RC4   5       /* Alleged RC4 */
 #define SSH_CIPHER_BLOWFISH     6  #define SSH_CIPHER_BLOWFISH     6
 #define SSH_CIPHER_RESERVED     7  #define SSH_CIPHER_RESERVED     7
   #define SSH_CIPHER_MAX          31
   
 /* these ciphers are used in SSH2: */  typedef struct Cipher Cipher;
 #define SSH_CIPHER_BLOWFISH_CBC 8  typedef struct CipherContext CipherContext;
 #define SSH_CIPHER_3DES_CBC     9  
 #define SSH_CIPHER_ARCFOUR      10      /* Alleged RC4 */  
 #define SSH_CIPHER_CAST128_CBC  11  
   
 typedef struct {  struct CipherContext {
         unsigned int type;  
         union {          union {
                 struct {                  struct {
                           des_key_schedule key;
                           des_cblock iv;
                   }       des;
                   struct {
                         des_key_schedule key1;                          des_key_schedule key1;
                         des_key_schedule key2;                          des_key_schedule key2;
                         des_cblock iv2;                          des_cblock iv2;
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                 }       des3;                  }       des3;
                 struct {                  struct {
                         struct bf_key_st key;                          struct bf_key_st key;
                         unsigned char iv[8];                          u_char iv[8];
                 }       bf;                  }       bf;
                 struct {                  struct {
                         CAST_KEY key;                          CAST_KEY key;
                         unsigned char iv[8];                          u_char iv[8];
                 } cast;                  } cast;
                   struct {
                           u4byte iv[4];
                           rijndael_ctx enc;
                           rijndael_ctx dec;
                   } rijndael;
                 RC4_KEY rc4;                  RC4_KEY rc4;
         }       u;          }       u;
 }       CipherContext;          Cipher *cipher;
 /*  };
  * Returns a bit mask indicating which ciphers are supported by this  struct Cipher {
  * implementation.  The bit mask has the corresponding bit set of each          char    *name;
  * supported cipher.          int     number;         /* for ssh1 only */
  */          u_int   block_size;
 unsigned int cipher_mask();          u_int   key_len;
 unsigned int cipher_mask1();          void    (*setkey)(CipherContext *, const u_char *, u_int);
 unsigned int cipher_mask2();          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);
   };
   
 /* Returns the name of the cipher. */  unsigned int cipher_mask_ssh1(int client);
 const char *cipher_name(int cipher);  Cipher *cipher_by_name(const char *name);
   Cipher *cipher_by_number(int id);
 /*  int cipher_number(const char *name);
  * Parses the name of the cipher.  Returns the number of the corresponding  char *cipher_name(int id);
  * cipher, or -1 on error.  int ciphers_valid(const char *names);
  */  void cipher_init(CipherContext *, Cipher *, const u_char *, u_int, const u_char *, u_int);
 int     cipher_number(const char *name);  void cipher_encrypt(CipherContext *context, u_char *dest, const u_char *src, u_int len);
   void cipher_decrypt(CipherContext *context, u_char *dest, const u_char *src, u_int len);
 /* returns 1 if all ciphers are supported (ssh2 only) */  void cipher_set_key_string(CipherContext *context, Cipher *cipher, const char *passphrase);
 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);  
   
 /* Decrypts data using the cipher. */  
 void  
 cipher_decrypt(CipherContext * context, unsigned char *dest,  
     const unsigned char *src, unsigned int len);  
   
 #endif                          /* CIPHER_H */  #endif                          /* CIPHER_H */
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