crypto/openssl/engines/ccgost/gost89.h

   1 /**********************************************************************
   2  *                        gost89.h                                    *
   3  *             Copyright (c) 2005-2006 Cryptocom LTD                  *
   4  *     This file is distributed under the same license as OpenSSL     *
   5  *                                                                    *
   6  *          Declarations for GOST 28147-89 encryption algorithm       *
   7  *            No OpenSSL libraries required to compile and use        *
   8  *                       this code                                    *
   9  **********************************************************************/
  10 #ifndef GOST89_H
  11 # define GOST89_H
  12
  13 /* Typedef for unsigned 32-bit integer */
  14 # if __LONG_MAX__ > 2147483647L
  15 typedef unsigned int u4;
  16 # else
  17 typedef unsigned long u4;
  18 # endif
  19 /* Typedef for unsigned 8-bit integer */
  20 typedef unsigned char byte;
  21
  22 /* Internal representation of GOST substitution blocks */
  23 typedef struct {
  24     byte k8[16];
  25     byte k7[16];
  26     byte k6[16];
  27     byte k5[16];
  28     byte k4[16];
  29     byte k3[16];
  30     byte k2[16];
  31     byte k1[16];
  32 } gost_subst_block;
  33
  34 /* Cipher context includes key and preprocessed  substitution block */
  35 typedef struct {
  36     u4 k[8];
  37     /* Constant s-boxes -- set up in gost_init(). */
  38     u4 k87[256], k65[256], k43[256], k21[256];
  39 } gost_ctx;
  40 /*
  41  * Note: encrypt and decrypt expect full blocks--padding blocks is caller's
  42  * responsibility. All bulk encryption is done in ECB mode by these calls.
  43  * Other modes may be added easily enough.
  44  */
  45 /* Encrypt several full blocks in ECB mode */
  46 void gost_enc(gost_ctx * ctx, const byte * clear, byte * cipher, int blocks);
  47 /* Decrypt several full blocks in ECB mode */
  48 void gost_dec(gost_ctx * ctx, const byte * cipher, byte * clear, int blocks);
  49 /* Encrypts several full blocks in CFB mode using 8byte IV */
  50 void gost_enc_cfb(gost_ctx * ctx, const byte * iv, const byte * clear,
  51                   byte * cipher, int blocks);
  52 /* Decrypts several full blocks in CFB mode using 8byte IV */
  53 void gost_dec_cfb(gost_ctx * ctx, const byte * iv, const byte * cipher,
  54                   byte * clear, int blocks);
  55
  56 /* Encrypt one  block */
  57 void gostcrypt(gost_ctx * c, const byte * in, byte * out);
  58 /* Decrypt one  block */
  59 void gostdecrypt(gost_ctx * c, const byte * in, byte * out);
  60 /* Set key into context */
  61 void gost_key(gost_ctx * ctx, const byte * key);
  62 /* Get key from context */
  63 void gost_get_key(gost_ctx * ctx, byte * key);
  64 /* Set S-blocks into context */
  65 void gost_init(gost_ctx * ctx, const gost_subst_block * subst_block);
  66 /* Clean up context */
  67 void gost_destroy(gost_ctx * ctx);
  68 /* Intermediate function used for calculate hash */
  69 void gost_enc_with_key(gost_ctx *, byte * key, byte * inblock,
  70                        byte * outblock);
  71 /* Compute MAC of given length in bits from data */
  72 int gost_mac(gost_ctx * ctx, int hmac_len, const unsigned char *data,
  73              unsigned int data_len, unsigned char *hmac);
  74 /*
  75  * Compute MAC of given length in bits from data, using non-zero 8-byte IV
  76  * (non-standard, for use in CryptoPro key transport only
  77  */
  78 int gost_mac_iv(gost_ctx * ctx, int hmac_len, const unsigned char *iv,
  79                 const unsigned char *data, unsigned int data_len,
  80                 unsigned char *hmac);
  81 /* Perform one step of MAC calculation like gostcrypt */
  82 void mac_block(gost_ctx * c, byte * buffer, const byte * block);
  83 /* Extracts MAC value from mac state buffer */
  84 void get_mac(byte * buffer, int nbits, byte * out);
  85 /* Implements cryptopro key meshing algorithm. Expect IV to be 8-byte size*/
  86 void cryptopro_key_meshing(gost_ctx * ctx, unsigned char *iv);
  87 /* Parameter sets specified in RFC 4357 */
  88 extern gost_subst_block GostR3411_94_TestParamSet;
  89 extern gost_subst_block GostR3411_94_CryptoProParamSet;
  90 extern gost_subst_block Gost28147_TestParamSet;
  91 extern gost_subst_block Gost28147_CryptoProParamSetA;
  92 extern gost_subst_block Gost28147_CryptoProParamSetB;
  93 extern gost_subst_block Gost28147_CryptoProParamSetC;
  94 extern gost_subst_block Gost28147_CryptoProParamSetD;
  95 extern const byte CryptoProKeyMeshingKey[];
  96 typedef unsigned int word32;
  97
  98 #endif