include/cipher.h

   1 /* cipher.h - Definitions for OpenPGP
   2  * Copyright (C) 1998, 1999, 2000, 2001, 2006,
   3  *               2007  Free Software Foundation, Inc.
   4  *
   5  * This file is part of GnuPG.
   6  *
   7  * GnuPG is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * GnuPG is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20 #ifndef G10_CIPHER_H
  21 #define G10_CIPHER_H
  22
  23 #include <gcrypt.h>
  24
  25 /* Macros for compatibility with older libgcrypt versions. */
  26 #ifndef GCRY_PK_USAGE_CERT
  27 # define GCRY_PK_USAGE_CERT 4
  28 # define GCRY_PK_USAGE_AUTH 8
  29 # define GCRY_PK_USAGE_UNKN 128
  30 #endif
  31
  32
  33 /* Constants for OpenPGP. */
  34
  35 #define CIPHER_ALGO_NONE         /*  0 */  GCRY_CIPHER_NONE
  36 #define CIPHER_ALGO_IDEA         /*  1 */  GCRY_CIPHER_IDEA
  37 #define CIPHER_ALGO_3DES         /*  2 */  GCRY_CIPHER_3DES
  38 #define CIPHER_ALGO_CAST5        /*  3 */  GCRY_CIPHER_CAST5
  39 #define CIPHER_ALGO_BLOWFISH     /*  4 */  GCRY_CIPHER_BLOWFISH /* 128 bit */
  40 /* 5 & 6 are reserved */
  41 #define CIPHER_ALGO_AES          /*  7 */  GCRY_CIPHER_AES
  42 #define CIPHER_ALGO_AES192       /*  8 */  GCRY_CIPHER_AES192
  43 #define CIPHER_ALGO_AES256       /*  9 */  GCRY_CIPHER_AES256
  44 #define CIPHER_ALGO_RIJNDAEL     CIPHER_ALGO_AES
  45 #define CIPHER_ALGO_RIJNDAEL192  CIPHER_ALGO_AES192
  46 #define CIPHER_ALGO_RIJNDAEL256  CIPHER_ALGO_AES256
  47 #define CIPHER_ALGO_TWOFISH      /* 10 */  GCRY_CIPHER_TWOFISH  /* 256 bit */
  48 /* Note: Camellia ids don't match those used by libgcrypt. */
  49 #define CIPHER_ALGO_CAMELLIA128     11
  50 #define CIPHER_ALGO_CAMELLIA192     12
  51 #define CIPHER_ALGO_CAMELLIA256     13
  52 #define CIPHER_ALGO_DUMMY          110    /* No encryption at all. */
  53
  54 #define PUBKEY_ALGO_RSA          /*  1 */ GCRY_PK_RSA
  55 #define PUBKEY_ALGO_RSA_E        /*  2 */ GCRY_PK_RSA_E /* RSA encrypt only. */
  56 #define PUBKEY_ALGO_RSA_S        /*  3 */ GCRY_PK_RSA_S /* RSA sign only.    */
  57 #define PUBKEY_ALGO_ELGAMAL_E    /* 16 */ GCRY_PK_ELG_E /* Elgamal encr only */
  58 #define PUBKEY_ALGO_DSA          /* 17 */ GCRY_PK_DSA
  59 #define PUBKEY_ALGO_ELGAMAL      /* 20 */ GCRY_PK_ELG   /* Elgamal encr+sign */
  60
  61 #define PUBKEY_USAGE_SIG     GCRY_PK_USAGE_SIGN  /* Good for signatures. */
  62 #define PUBKEY_USAGE_ENC     GCRY_PK_USAGE_ENCR  /* Good for encryption. */
  63 #define PUBKEY_USAGE_CERT    GCRY_PK_USAGE_CERT  /* Also good to certify keys. */
  64 #define PUBKEY_USAGE_AUTH    GCRY_PK_USAGE_AUTH  /* Good for authentication. */
  65 #define PUBKEY_USAGE_UNKNOWN GCRY_PK_USAGE_UNKN  /* Unknown usage flag. */
  66
  67 #define DIGEST_ALGO_MD5       /*  1 */ GCRY_MD_MD5
  68 #define DIGEST_ALGO_SHA1      /*  2 */ GCRY_MD_SHA1
  69 #define DIGEST_ALGO_RMD160    /*  3 */ GCRY_MD_RMD160
  70 /* 4, 5, 6, and 7 are reserved */
  71 #define DIGEST_ALGO_SHA256    /*  8 */ GCRY_MD_SHA256
  72 #define DIGEST_ALGO_SHA384    /*  9 */ GCRY_MD_SHA384
  73 #define DIGEST_ALGO_SHA512    /* 10 */ GCRY_MD_SHA512
  74 /* SHA224 is only available in libgcrypt 1.4.0; thus we
  75    can't use the GCRY macro here.  */
  76 #define DIGEST_ALGO_SHA224    /* 11 */ 11 /* GCRY_MD_SHA224 */
  77
  78 #define COMPRESS_ALGO_NONE 0
  79 #define COMPRESS_ALGO_ZIP  1
  80 #define COMPRESS_ALGO_ZLIB 2
  81 #define COMPRESS_ALGO_BZIP2  3
  82
  83 #define is_RSA(a)     ((a)==PUBKEY_ALGO_RSA || (a)==PUBKEY_ALGO_RSA_E \
  84                        || (a)==PUBKEY_ALGO_RSA_S )
  85 #define is_ELGAMAL(a) ((a)==PUBKEY_ALGO_ELGAMAL_E)
  86 #define is_DSA(a)     ((a)==PUBKEY_ALGO_DSA)
  87
  88 /* The data encryption key object. */
  89 typedef struct
  90 {
  91   int algo;
  92   int keylen;
  93   int algo_info_printed;
  94   int use_mdc;
  95   int symmetric;
  96   byte key[32]; /* This is the largest used keylen (256 bit). */
  97   char s2k_cacheid[1+16+1];
  98 } DEK;
  99
 100
 101
 102 /* Constants to allocate static MPI arrays. */
 103 #define PUBKEY_MAX_NPKEY  4
 104 #define PUBKEY_MAX_NSKEY  6
 105 #define PUBKEY_MAX_NSIG   2
 106 #define PUBKEY_MAX_NENC   2
 107
 108 #endif /*G10_CIPHER_H*/