* 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
+/*-
+ 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}
- };
+ {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}
- } ;
+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}
- };
-
-
-
+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}
- };
+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}
- };
+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
- };
+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*/
-void kboxinit(gost_ctx *c, const gost_subst_block *b)
- {
- int i;
-
- for (i = 0; i < 256; i++)
- {
- c->k87[i] = (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];
-
- }
- }
+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);
- }
+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)|(in[3]<<24);
- n2 = in[4]|(in[5]<<8)|(in[6]<<16)|(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] = (n2&0xff); out[1] = (n2>>8)&0xff; out[2]=(n2>>16)&0xff; out[3]=n2>>24;
- out[4] = (n1&0xff); out[5] = (n1>>8)&0xff; out[6]=(n1>>16)&0xff; out[7]=n1>>24;
- }
+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)|(in[3]<<24);
- n2 = in[4]|(in[5]<<8)|(in[6]<<16)|(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] = (n2&0xff); out[1] = (n2>>8)&0xff; out[2]=(n2>>16)&0xff; out[3]=n2>>24;
- out[4] = (n1&0xff); out[5] = (n1>>8)&0xff; out[6]=(n1>>16)&0xff; out[7]=n1>>24;
- }
+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;
- }
- }
+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;
- }
- }
+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];
- }
- }
- }
+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];
- }
- }
- }
+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);
- }
+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)|(k[j+3]<<24);
- }
- }
+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]=c->k[i]& 0xFF;
- k[j+1]=(c->k[i]>>8 )&0xFF;
- k[j+2]=(c->k[i]>>16) &0xFF;
- k[j+3]=(c->k[i]>>24) &0xFF;
- }
- }
+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);
- }
+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)|(buffer[3]<<24);
- n2 = buffer[4]|(buffer[5]<<8)|(buffer[6]<<16)|(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] = (n1&0xff); buffer[1] = (n1>>8)&0xff; buffer[2]=(n1>>16)&0xff; buffer[3]=n1>>24;
- buffer[4] = (n2&0xff); buffer[5] = (n2>>8)&0xff; buffer[6]=(n2>>16)&0xff; buffer[7]=n2>>24;
- }
+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];
- 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);
- }
- get_mac(buffer,mac_len,mac);
- return 1;
- }
+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];
- 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);
- }
- get_mac(buffer,mac_len,mac);
- return 1;
- }
+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);
- }
+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