1 /**********************************************************************
3 * Copyright (c) 2005-2006 Cryptocom LTD *
4 * This file is distributed under the same license as OpenSSL *
6 * Declarations for GOST 28147-89 encryption algorithm *
7 * No OpenSSL libraries required to compile and use *
9 **********************************************************************/
13 /* Typedef for unsigned 32-bit integer */
14 # if __LONG_MAX__ > 2147483647L
15 typedef unsigned int u4;
17 typedef unsigned long u4;
19 /* Typedef for unsigned 8-bit integer */
20 typedef unsigned char byte;
22 /* Internal representation of GOST substitution blocks */
34 /* Cipher context includes key and preprocessed substitution block */
37 /* Constant s-boxes -- set up in gost_init(). */
38 u4 k87[256], k65[256], k43[256], k21[256];
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.
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);
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 /* Set key into context */
63 void magma_key(gost_ctx * ctx, const byte * key);
64 /* Get key from context */
65 void gost_get_key(gost_ctx * ctx, byte * key);
66 /* Set S-blocks into context */
67 void gost_init(gost_ctx * ctx, const gost_subst_block * subst_block);
68 /* Clean up context */
69 void gost_destroy(gost_ctx * ctx);
70 /* Intermediate function used for calculate hash */
71 void gost_enc_with_key(gost_ctx *, byte * key, byte * inblock,
73 /* Compute MAC of given length in bits from data */
74 int gost_mac(gost_ctx * ctx, int hmac_len, const unsigned char *data,
75 unsigned int data_len, unsigned char *hmac);
77 * Compute MAC of given length in bits from data, using non-zero 8-byte IV
78 * (non-standard, for use in CryptoPro key transport only
80 int gost_mac_iv(gost_ctx * ctx, int hmac_len, const unsigned char *iv,
81 const unsigned char *data, unsigned int data_len,
83 /* Perform one step of MAC calculation like gostcrypt */
84 void mac_block(gost_ctx * c, byte * buffer, const byte * block);
85 /* Extracts MAC value from mac state buffer */
86 void get_mac(byte * buffer, int nbits, byte * out);
87 /* Implements cryptopro key meshing algorithm. Expect IV to be 8-byte size*/
88 void cryptopro_key_meshing(gost_ctx * ctx, unsigned char *iv);
89 /* Parameter sets specified in RFC 4357 */
90 extern gost_subst_block GostR3411_94_TestParamSet;
91 extern gost_subst_block GostR3411_94_CryptoProParamSet;
92 extern gost_subst_block Gost28147_TestParamSet;
93 extern gost_subst_block Gost28147_CryptoProParamSetA;
94 extern gost_subst_block Gost28147_CryptoProParamSetB;
95 extern gost_subst_block Gost28147_CryptoProParamSetC;
96 extern gost_subst_block Gost28147_CryptoProParamSetD;
97 extern gost_subst_block Gost28147_TC26ParamSetZ;
98 extern const byte CryptoProKeyMeshingKey[];
99 typedef unsigned int word32;
101 void kboxinit(gost_ctx * c, const gost_subst_block * b);
102 void magma_get_key(gost_ctx * c, byte * k);
103 void acpkm_magma_key_meshing(gost_ctx * ctx);