+++ /dev/null
-/**********************************************************************
- * gost89.c *
- * Copyright (c) 2005-2006 Cryptocom LTD *
- * This file is distributed under the same license as OpenSSL *
- * *
- * Implementation of GOST 28147-89 encryption algorithm *
- * No OpenSSL libraries required to compile and use *
- * this code *
- **********************************************************************/
-#include <string.h>
-#include "gost89.h"
-/*-
- Substitution blocks from RFC 4357
-
- Note: our implementation of gost 28147-89 algorithm
- uses S-box matrix rotated 90 degrees counterclockwise, relative to
- examples given in RFC.
-
-
-*/
-
-/* Substitution blocks from test examples for GOST R 34.11-94*/
-gost_subst_block GostR3411_94_TestParamSet = {
- {0X1, 0XF, 0XD, 0X0, 0X5, 0X7, 0XA, 0X4, 0X9, 0X2, 0X3, 0XE, 0X6, 0XB,
- 0X8, 0XC}
- ,
- {0XD, 0XB, 0X4, 0X1, 0X3, 0XF, 0X5, 0X9, 0X0, 0XA, 0XE, 0X7, 0X6, 0X8,
- 0X2, 0XC}
- ,
- {0X4, 0XB, 0XA, 0X0, 0X7, 0X2, 0X1, 0XD, 0X3, 0X6, 0X8, 0X5, 0X9, 0XC,
- 0XF, 0XE}
- ,
- {0X6, 0XC, 0X7, 0X1, 0X5, 0XF, 0XD, 0X8, 0X4, 0XA, 0X9, 0XE, 0X0, 0X3,
- 0XB, 0X2}
- ,
- {0X7, 0XD, 0XA, 0X1, 0X0, 0X8, 0X9, 0XF, 0XE, 0X4, 0X6, 0XC, 0XB, 0X2,
- 0X5, 0X3}
- ,
- {0X5, 0X8, 0X1, 0XD, 0XA, 0X3, 0X4, 0X2, 0XE, 0XF, 0XC, 0X7, 0X6, 0X0,
- 0X9, 0XB}
- ,
- {0XE, 0XB, 0X4, 0XC, 0X6, 0XD, 0XF, 0XA, 0X2, 0X3, 0X8, 0X1, 0X0, 0X7,
- 0X5, 0X9}
- ,
- {0X4, 0XA, 0X9, 0X2, 0XD, 0X8, 0X0, 0XE, 0X6, 0XB, 0X1, 0XC, 0X7, 0XF,
- 0X5, 0X3}
-};
-
-/* Substitution blocks for hash function 1.2.643.2.9.1.6.1 */
-gost_subst_block GostR3411_94_CryptoProParamSet = {
- {0x1, 0x3, 0xA, 0x9, 0x5, 0xB, 0x4, 0xF, 0x8, 0x6, 0x7, 0xE, 0xD, 0x0,
- 0x2, 0xC}
- ,
- {0xD, 0xE, 0x4, 0x1, 0x7, 0x0, 0x5, 0xA, 0x3, 0xC, 0x8, 0xF, 0x6, 0x2,
- 0x9, 0xB}
- ,
- {0x7, 0x6, 0x2, 0x4, 0xD, 0x9, 0xF, 0x0, 0xA, 0x1, 0x5, 0xB, 0x8, 0xE,
- 0xC, 0x3}
- ,
- {0x7, 0x6, 0x4, 0xB, 0x9, 0xC, 0x2, 0xA, 0x1, 0x8, 0x0, 0xE, 0xF, 0xD,
- 0x3, 0x5}
- ,
- {0x4, 0xA, 0x7, 0xC, 0x0, 0xF, 0x2, 0x8, 0xE, 0x1, 0x6, 0x5, 0xD, 0xB,
- 0x9, 0x3}
- ,
- {0x7, 0xF, 0xC, 0xE, 0x9, 0x4, 0x1, 0x0, 0x3, 0xB, 0x5, 0x2, 0x6, 0xA,
- 0x8, 0xD}
- ,
- {0x5, 0xF, 0x4, 0x0, 0x2, 0xD, 0xB, 0x9, 0x1, 0x7, 0x6, 0x3, 0xC, 0xE,
- 0xA, 0x8}
- ,
- {0xA, 0x4, 0x5, 0x6, 0x8, 0x1, 0x3, 0x7, 0xD, 0xC, 0xE, 0x0, 0x9, 0x2,
- 0xB, 0xF}
-};
-
-/* Test paramset from GOST 28147 */
-gost_subst_block Gost28147_TestParamSet = {
- {0xC, 0x6, 0x5, 0x2, 0xB, 0x0, 0x9, 0xD, 0x3, 0xE, 0x7, 0xA, 0xF, 0x4,
- 0x1, 0x8}
- ,
- {0x9, 0xB, 0xC, 0x0, 0x3, 0x6, 0x7, 0x5, 0x4, 0x8, 0xE, 0xF, 0x1, 0xA,
- 0x2, 0xD}
- ,
- {0x8, 0xF, 0x6, 0xB, 0x1, 0x9, 0xC, 0x5, 0xD, 0x3, 0x7, 0xA, 0x0, 0xE,
- 0x2, 0x4}
- ,
- {0x3, 0xE, 0x5, 0x9, 0x6, 0x8, 0x0, 0xD, 0xA, 0xB, 0x7, 0xC, 0x2, 0x1,
- 0xF, 0x4}
- ,
- {0xE, 0x9, 0xB, 0x2, 0x5, 0xF, 0x7, 0x1, 0x0, 0xD, 0xC, 0x6, 0xA, 0x4,
- 0x3, 0x8}
- ,
- {0xD, 0x8, 0xE, 0xC, 0x7, 0x3, 0x9, 0xA, 0x1, 0x5, 0x2, 0x4, 0x6, 0xF,
- 0x0, 0xB}
- ,
- {0xC, 0x9, 0xF, 0xE, 0x8, 0x1, 0x3, 0xA, 0x2, 0x7, 0x4, 0xD, 0x6, 0x0,
- 0xB, 0x5}
- ,
- {0x4, 0x2, 0xF, 0x5, 0x9, 0x1, 0x0, 0x8, 0xE, 0x3, 0xB, 0xC, 0xD, 0x7,
- 0xA, 0x6}
-};
-
-/* 1.2.643.2.2.31.1 */
-gost_subst_block Gost28147_CryptoProParamSetA = {
- {0xB, 0xA, 0xF, 0x5, 0x0, 0xC, 0xE, 0x8, 0x6, 0x2, 0x3, 0x9, 0x1, 0x7,
- 0xD, 0x4}
- ,
- {0x1, 0xD, 0x2, 0x9, 0x7, 0xA, 0x6, 0x0, 0x8, 0xC, 0x4, 0x5, 0xF, 0x3,
- 0xB, 0xE}
- ,
- {0x3, 0xA, 0xD, 0xC, 0x1, 0x2, 0x0, 0xB, 0x7, 0x5, 0x9, 0x4, 0x8, 0xF,
- 0xE, 0x6}
- ,
- {0xB, 0x5, 0x1, 0x9, 0x8, 0xD, 0xF, 0x0, 0xE, 0x4, 0x2, 0x3, 0xC, 0x7,
- 0xA, 0x6}
- ,
- {0xE, 0x7, 0xA, 0xC, 0xD, 0x1, 0x3, 0x9, 0x0, 0x2, 0xB, 0x4, 0xF, 0x8,
- 0x5, 0x6}
- ,
- {0xE, 0x4, 0x6, 0x2, 0xB, 0x3, 0xD, 0x8, 0xC, 0xF, 0x5, 0xA, 0x0, 0x7,
- 0x1, 0x9}
- ,
- {0x3, 0x7, 0xE, 0x9, 0x8, 0xA, 0xF, 0x0, 0x5, 0x2, 0x6, 0xC, 0xB, 0x4,
- 0xD, 0x1}
- ,
- {0x9, 0x6, 0x3, 0x2, 0x8, 0xB, 0x1, 0x7, 0xA, 0x4, 0xE, 0xF, 0xC, 0x0,
- 0xD, 0x5}
-};
-
-/* 1.2.643.2.2.31.2 */
-gost_subst_block Gost28147_CryptoProParamSetB = {
- {0x0, 0x4, 0xB, 0xE, 0x8, 0x3, 0x7, 0x1, 0xA, 0x2, 0x9, 0x6, 0xF, 0xD,
- 0x5, 0xC}
- ,
- {0x5, 0x2, 0xA, 0xB, 0x9, 0x1, 0xC, 0x3, 0x7, 0x4, 0xD, 0x0, 0x6, 0xF,
- 0x8, 0xE}
- ,
- {0x8, 0x3, 0x2, 0x6, 0x4, 0xD, 0xE, 0xB, 0xC, 0x1, 0x7, 0xF, 0xA, 0x0,
- 0x9, 0x5}
- ,
- {0x2, 0x7, 0xC, 0xF, 0x9, 0x5, 0xA, 0xB, 0x1, 0x4, 0x0, 0xD, 0x6, 0x8,
- 0xE, 0x3}
- ,
- {0x7, 0x5, 0x0, 0xD, 0xB, 0x6, 0x1, 0x2, 0x3, 0xA, 0xC, 0xF, 0x4, 0xE,
- 0x9, 0x8}
- ,
- {0xE, 0xC, 0x0, 0xA, 0x9, 0x2, 0xD, 0xB, 0x7, 0x5, 0x8, 0xF, 0x3, 0x6,
- 0x1, 0x4}
- ,
- {0x0, 0x1, 0x2, 0xA, 0x4, 0xD, 0x5, 0xC, 0x9, 0x7, 0x3, 0xF, 0xB, 0x8,
- 0x6, 0xE}
- ,
- {0x8, 0x4, 0xB, 0x1, 0x3, 0x5, 0x0, 0x9, 0x2, 0xE, 0xA, 0xC, 0xD, 0x6,
- 0x7, 0xF}
-};
-
-/* 1.2.643.2.2.31.3 */
-gost_subst_block Gost28147_CryptoProParamSetC = {
- {0x7, 0x4, 0x0, 0x5, 0xA, 0x2, 0xF, 0xE, 0xC, 0x6, 0x1, 0xB, 0xD, 0x9,
- 0x3, 0x8}
- ,
- {0xA, 0x9, 0x6, 0x8, 0xD, 0xE, 0x2, 0x0, 0xF, 0x3, 0x5, 0xB, 0x4, 0x1,
- 0xC, 0x7}
- ,
- {0xC, 0x9, 0xB, 0x1, 0x8, 0xE, 0x2, 0x4, 0x7, 0x3, 0x6, 0x5, 0xA, 0x0,
- 0xF, 0xD}
- ,
- {0x8, 0xD, 0xB, 0x0, 0x4, 0x5, 0x1, 0x2, 0x9, 0x3, 0xC, 0xE, 0x6, 0xF,
- 0xA, 0x7}
- ,
- {0x3, 0x6, 0x0, 0x1, 0x5, 0xD, 0xA, 0x8, 0xB, 0x2, 0x9, 0x7, 0xE, 0xF,
- 0xC, 0x4}
- ,
- {0x8, 0x2, 0x5, 0x0, 0x4, 0x9, 0xF, 0xA, 0x3, 0x7, 0xC, 0xD, 0x6, 0xE,
- 0x1, 0xB}
- ,
- {0x0, 0x1, 0x7, 0xD, 0xB, 0x4, 0x5, 0x2, 0x8, 0xE, 0xF, 0xC, 0x9, 0xA,
- 0x6, 0x3}
- ,
- {0x1, 0xB, 0xC, 0x2, 0x9, 0xD, 0x0, 0xF, 0x4, 0x5, 0x8, 0xE, 0xA, 0x7,
- 0x6, 0x3}
-};
-
-/* 1.2.643.2.2.31.4 */
-gost_subst_block Gost28147_CryptoProParamSetD = {
- {0x1, 0xA, 0x6, 0x8, 0xF, 0xB, 0x0, 0x4, 0xC, 0x3, 0x5, 0x9, 0x7, 0xD,
- 0x2, 0xE}
- ,
- {0x3, 0x0, 0x6, 0xF, 0x1, 0xE, 0x9, 0x2, 0xD, 0x8, 0xC, 0x4, 0xB, 0xA,
- 0x5, 0x7}
- ,
- {0x8, 0x0, 0xF, 0x3, 0x2, 0x5, 0xE, 0xB, 0x1, 0xA, 0x4, 0x7, 0xC, 0x9,
- 0xD, 0x6}
- ,
- {0x0, 0xC, 0x8, 0x9, 0xD, 0x2, 0xA, 0xB, 0x7, 0x3, 0x6, 0x5, 0x4, 0xE,
- 0xF, 0x1}
- ,
- {0x1, 0x5, 0xE, 0xC, 0xA, 0x7, 0x0, 0xD, 0x6, 0x2, 0xB, 0x4, 0x9, 0x3,
- 0xF, 0x8}
- ,
- {0x1, 0xC, 0xB, 0x0, 0xF, 0xE, 0x6, 0x5, 0xA, 0xD, 0x4, 0x8, 0x9, 0x3,
- 0x7, 0x2}
- ,
- {0xB, 0x6, 0x3, 0x4, 0xC, 0xF, 0xE, 0x2, 0x7, 0xD, 0x8, 0x0, 0x5, 0xA,
- 0x9, 0x1}
- ,
- {0xF, 0xC, 0x2, 0xA, 0x6, 0x4, 0x5, 0x0, 0x7, 0x9, 0xE, 0xD, 0x1, 0xB,
- 0x8, 0x3}
-};
-
-const byte CryptoProKeyMeshingKey[] = {
- 0x69, 0x00, 0x72, 0x22, 0x64, 0xC9, 0x04, 0x23,
- 0x8D, 0x3A, 0xDB, 0x96, 0x46, 0xE9, 0x2A, 0xC4,
- 0x18, 0xFE, 0xAC, 0x94, 0x00, 0xED, 0x07, 0x12,
- 0xC0, 0x86, 0xDC, 0xC2, 0xEF, 0x4C, 0xA9, 0x2B
-};
-
-/* Initialization of gost_ctx subst blocks*/
-static void kboxinit(gost_ctx * c, const gost_subst_block * b)
-{
- int i;
-
- for (i = 0; i < 256; i++) {
- c->k87[i] = (word32) (b->k8[i >> 4] << 4 | b->k7[i & 15]) << 24;
- c->k65[i] = (b->k6[i >> 4] << 4 | b->k5[i & 15]) << 16;
- c->k43[i] = (b->k4[i >> 4] << 4 | b->k3[i & 15]) << 8;
- c->k21[i] = b->k2[i >> 4] << 4 | b->k1[i & 15];
-
- }
-}
-
-/* Part of GOST 28147 algorithm moved into separate function */
-static word32 f(gost_ctx * c, word32 x)
-{
- x = c->k87[x >> 24 & 255] | c->k65[x >> 16 & 255] |
- c->k43[x >> 8 & 255] | c->k21[x & 255];
- /* Rotate left 11 bits */
- return x << 11 | x >> (32 - 11);
-}
-
-/* Low-level encryption routine - encrypts one 64 bit block*/
-void gostcrypt(gost_ctx * c, const byte * in, byte * out)
-{
- register word32 n1, n2; /* As named in the GOST */
- n1 = in[0] | (in[1] << 8) | (in[2] << 16) | ((word32) in[3] << 24);
- n2 = in[4] | (in[5] << 8) | (in[6] << 16) | ((word32) in[7] << 24);
- /* Instead of swapping halves, swap names each round */
-
- n2 ^= f(c, n1 + c->k[0]);
- n1 ^= f(c, n2 + c->k[1]);
- n2 ^= f(c, n1 + c->k[2]);
- n1 ^= f(c, n2 + c->k[3]);
- n2 ^= f(c, n1 + c->k[4]);
- n1 ^= f(c, n2 + c->k[5]);
- n2 ^= f(c, n1 + c->k[6]);
- n1 ^= f(c, n2 + c->k[7]);
-
- n2 ^= f(c, n1 + c->k[0]);
- n1 ^= f(c, n2 + c->k[1]);
- n2 ^= f(c, n1 + c->k[2]);
- n1 ^= f(c, n2 + c->k[3]);
- n2 ^= f(c, n1 + c->k[4]);
- n1 ^= f(c, n2 + c->k[5]);
- n2 ^= f(c, n1 + c->k[6]);
- n1 ^= f(c, n2 + c->k[7]);
-
- n2 ^= f(c, n1 + c->k[0]);
- n1 ^= f(c, n2 + c->k[1]);
- n2 ^= f(c, n1 + c->k[2]);
- n1 ^= f(c, n2 + c->k[3]);
- n2 ^= f(c, n1 + c->k[4]);
- n1 ^= f(c, n2 + c->k[5]);
- n2 ^= f(c, n1 + c->k[6]);
- n1 ^= f(c, n2 + c->k[7]);
-
- n2 ^= f(c, n1 + c->k[7]);
- n1 ^= f(c, n2 + c->k[6]);
- n2 ^= f(c, n1 + c->k[5]);
- n1 ^= f(c, n2 + c->k[4]);
- n2 ^= f(c, n1 + c->k[3]);
- n1 ^= f(c, n2 + c->k[2]);
- n2 ^= f(c, n1 + c->k[1]);
- n1 ^= f(c, n2 + c->k[0]);
-
- out[0] = (byte) (n2 & 0xff);
- out[1] = (byte) ((n2 >> 8) & 0xff);
- out[2] = (byte) ((n2 >> 16) & 0xff);
- out[3] = (byte) (n2 >> 24);
- out[4] = (byte) (n1 & 0xff);
- out[5] = (byte) ((n1 >> 8) & 0xff);
- out[6] = (byte) ((n1 >> 16) & 0xff);
- out[7] = (byte) (n1 >> 24);
-}
-
-/* Low-level decryption routine. Decrypts one 64-bit block */
-void gostdecrypt(gost_ctx * c, const byte * in, byte * out)
-{
- register word32 n1, n2; /* As named in the GOST */
- n1 = in[0] | (in[1] << 8) | (in[2] << 16) | ((word32) in[3] << 24);
- n2 = in[4] | (in[5] << 8) | (in[6] << 16) | ((word32) in[7] << 24);
-
- n2 ^= f(c, n1 + c->k[0]);
- n1 ^= f(c, n2 + c->k[1]);
- n2 ^= f(c, n1 + c->k[2]);
- n1 ^= f(c, n2 + c->k[3]);
- n2 ^= f(c, n1 + c->k[4]);
- n1 ^= f(c, n2 + c->k[5]);
- n2 ^= f(c, n1 + c->k[6]);
- n1 ^= f(c, n2 + c->k[7]);
-
- n2 ^= f(c, n1 + c->k[7]);
- n1 ^= f(c, n2 + c->k[6]);
- n2 ^= f(c, n1 + c->k[5]);
- n1 ^= f(c, n2 + c->k[4]);
- n2 ^= f(c, n1 + c->k[3]);
- n1 ^= f(c, n2 + c->k[2]);
- n2 ^= f(c, n1 + c->k[1]);
- n1 ^= f(c, n2 + c->k[0]);
-
- n2 ^= f(c, n1 + c->k[7]);
- n1 ^= f(c, n2 + c->k[6]);
- n2 ^= f(c, n1 + c->k[5]);
- n1 ^= f(c, n2 + c->k[4]);
- n2 ^= f(c, n1 + c->k[3]);
- n1 ^= f(c, n2 + c->k[2]);
- n2 ^= f(c, n1 + c->k[1]);
- n1 ^= f(c, n2 + c->k[0]);
-
- n2 ^= f(c, n1 + c->k[7]);
- n1 ^= f(c, n2 + c->k[6]);
- n2 ^= f(c, n1 + c->k[5]);
- n1 ^= f(c, n2 + c->k[4]);
- n2 ^= f(c, n1 + c->k[3]);
- n1 ^= f(c, n2 + c->k[2]);
- n2 ^= f(c, n1 + c->k[1]);
- n1 ^= f(c, n2 + c->k[0]);
-
- out[0] = (byte) (n2 & 0xff);
- out[1] = (byte) ((n2 >> 8) & 0xff);
- out[2] = (byte) ((n2 >> 16) & 0xff);
- out[3] = (byte) (n2 >> 24);
- out[4] = (byte) (n1 & 0xff);
- out[5] = (byte) ((n1 >> 8) & 0xff);
- out[6] = (byte) ((n1 >> 16) & 0xff);
- out[7] = (byte) (n1 >> 24);
-}
-
-/* Encrypts several blocks in ECB mode */
-void gost_enc(gost_ctx * c, const byte * clear, byte * cipher, int blocks)
-{
- int i;
- for (i = 0; i < blocks; i++) {
- gostcrypt(c, clear, cipher);
- clear += 8;
- cipher += 8;
- }
-}
-
-/* Decrypts several blocks in ECB mode */
-void gost_dec(gost_ctx * c, const byte * cipher, byte * clear, int blocks)
-{
- int i;
- for (i = 0; i < blocks; i++) {
- gostdecrypt(c, cipher, clear);
- clear += 8;
- cipher += 8;
- }
-}
-
-/* Encrypts several full blocks in CFB mode using 8byte IV */
-void gost_enc_cfb(gost_ctx * ctx, const byte * iv, const byte * clear,
- byte * cipher, int blocks)
-{
- byte cur_iv[8];
- byte gamma[8];
- int i, j;
- const byte *in;
- byte *out;
- memcpy(cur_iv, iv, 8);
- for (i = 0, in = clear, out = cipher; i < blocks; i++, in += 8, out += 8) {
- gostcrypt(ctx, cur_iv, gamma);
- for (j = 0; j < 8; j++) {
- cur_iv[j] = out[j] = in[j] ^ gamma[j];
- }
- }
-}
-
-/* Decrypts several full blocks in CFB mode using 8byte IV */
-void gost_dec_cfb(gost_ctx * ctx, const byte * iv, const byte * cipher,
- byte * clear, int blocks)
-{
- byte cur_iv[8];
- byte gamma[8];
- int i, j;
- const byte *in;
- byte *out;
- memcpy(cur_iv, iv, 8);
- for (i = 0, in = cipher, out = clear; i < blocks; i++, in += 8, out += 8) {
- gostcrypt(ctx, cur_iv, gamma);
- for (j = 0; j < 8; j++) {
- out[j] = (cur_iv[j] = in[j]) ^ gamma[j];
- }
- }
-}
-
-/* Encrypts one block using specified key */
-void gost_enc_with_key(gost_ctx * c, byte * key, byte * inblock,
- byte * outblock)
-{
- gost_key(c, key);
- gostcrypt(c, inblock, outblock);
-}
-
-/* Set 256 bit key into context */
-void gost_key(gost_ctx * c, const byte * k)
-{
- int i, j;
- for (i = 0, j = 0; i < 8; i++, j += 4) {
- c->k[i] =
- k[j] | (k[j + 1] << 8) | (k[j + 2] << 16) | ((word32) k[j + 3] <<
- 24);
- }
-}
-
-/* Retrieve 256-bit key from context */
-void gost_get_key(gost_ctx * c, byte * k)
-{
- int i, j;
- for (i = 0, j = 0; i < 8; i++, j += 4) {
- k[j] = (byte) (c->k[i] & 0xFF);
- k[j + 1] = (byte) ((c->k[i] >> 8) & 0xFF);
- k[j + 2] = (byte) ((c->k[i] >> 16) & 0xFF);
- k[j + 3] = (byte) ((c->k[i] >> 24) & 0xFF);
- }
-}
-
-/* Initalize context. Provides default value for subst_block */
-void gost_init(gost_ctx * c, const gost_subst_block * b)
-{
- if (!b) {
- b = &GostR3411_94_TestParamSet;
- }
- kboxinit(c, b);
-}
-
-/* Cleans up key from context */
-void gost_destroy(gost_ctx * c)
-{
- int i;
- for (i = 0; i < 8; i++)
- c->k[i] = 0;
-}
-
-/*
- * Compute GOST 28147 mac block Parameters gost_ctx *c - context initalized
- * with substitution blocks and key buffer - 8-byte mac state buffer block
- * 8-byte block to process.
- */
-void mac_block(gost_ctx * c, byte * buffer, const byte * block)
-{
- register word32 n1, n2; /* As named in the GOST */
- int i;
- for (i = 0; i < 8; i++) {
- buffer[i] ^= block[i];
- }
- n1 = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | ((word32)
- buffer[3] << 24);
- n2 = buffer[4] | (buffer[5] << 8) | (buffer[6] << 16) | ((word32)
- buffer[7] << 24);
- /* Instead of swapping halves, swap names each round */
-
- n2 ^= f(c, n1 + c->k[0]);
- n1 ^= f(c, n2 + c->k[1]);
- n2 ^= f(c, n1 + c->k[2]);
- n1 ^= f(c, n2 + c->k[3]);
- n2 ^= f(c, n1 + c->k[4]);
- n1 ^= f(c, n2 + c->k[5]);
- n2 ^= f(c, n1 + c->k[6]);
- n1 ^= f(c, n2 + c->k[7]);
-
- n2 ^= f(c, n1 + c->k[0]);
- n1 ^= f(c, n2 + c->k[1]);
- n2 ^= f(c, n1 + c->k[2]);
- n1 ^= f(c, n2 + c->k[3]);
- n2 ^= f(c, n1 + c->k[4]);
- n1 ^= f(c, n2 + c->k[5]);
- n2 ^= f(c, n1 + c->k[6]);
- n1 ^= f(c, n2 + c->k[7]);
-
- buffer[0] = (byte) (n1 & 0xff);
- buffer[1] = (byte) ((n1 >> 8) & 0xff);
- buffer[2] = (byte) ((n1 >> 16) & 0xff);
- buffer[3] = (byte) (n1 >> 24);
- buffer[4] = (byte) (n2 & 0xff);
- buffer[5] = (byte) ((n2 >> 8) & 0xff);
- buffer[6] = (byte) ((n2 >> 16) & 0xff);
- buffer[7] = (byte) (n2 >> 24);
-}
-
-/* Get mac with specified number of bits from MAC state buffer */
-void get_mac(byte * buffer, int nbits, byte * out)
-{
- int nbytes = nbits >> 3;
- int rembits = nbits & 7;
- int mask = rembits ? ((1 < rembits) - 1) : 0;
- int i;
- for (i = 0; i < nbytes; i++)
- out[i] = buffer[i];
- if (rembits)
- out[i] = buffer[i] & mask;
-}
-
-/*
- * Compute mac of specified length (in bits) from data. Context should be
- * initialized with key and subst blocks
- */
-int gost_mac(gost_ctx * ctx, int mac_len, const unsigned char *data,
- unsigned int data_len, unsigned char *mac)
-{
- byte buffer[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
- byte buf2[8];
- unsigned int i;
- for (i = 0; i + 8 <= data_len; i += 8)
- mac_block(ctx, buffer, data + i);
- if (i < data_len) {
- memset(buf2, 0, 8);
- memcpy(buf2, data + i, data_len - i);
- mac_block(ctx, buffer, buf2);
- i += 8;
- }
- if (i == 8) {
- memset(buf2, 0, 8);
- mac_block(ctx, buffer, buf2);
- }
- get_mac(buffer, mac_len, mac);
- return 1;
-}
-
-/* Compute MAC with non-zero IV. Used in some RFC 4357 algorithms */
-int gost_mac_iv(gost_ctx * ctx, int mac_len, const unsigned char *iv,
- const unsigned char *data, unsigned int data_len,
- unsigned char *mac)
-{
- byte buffer[8];
- byte buf2[8];
- unsigned int i;
- memcpy(buffer, iv, 8);
- for (i = 0; i + 8 <= data_len; i += 8)
- mac_block(ctx, buffer, data + i);
- if (i < data_len) {
- memset(buf2, 0, 8);
- memcpy(buf2, data + i, data_len - i);
- mac_block(ctx, buffer, buf2);
- i += 8;
- }
- if (i == 8) {
- memset(buf2, 0, 8);
- mac_block(ctx, buffer, buf2);
- }
- get_mac(buffer, mac_len, mac);
- return 1;
-}
-
-/* Implements key meshing algorithm by modifing ctx and IV in place */
-void cryptopro_key_meshing(gost_ctx * ctx, unsigned char *iv)
-{
- unsigned char newkey[32], newiv[8];
- /* Set static keymeshing key */
- /* "Decrypt" key with keymeshing key */
- gost_dec(ctx, CryptoProKeyMeshingKey, newkey, 4);
- /* set new key */
- gost_key(ctx, newkey);
- /* Encrypt iv with new key */
- gostcrypt(ctx, iv, newiv);
- memcpy(iv, newiv, 8);
-}
projects / openssl.git / blobdiff