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/*
* Copyright (C) 2018 vt@altlinux.org. All Rights Reserved.
*
* Contents licensed under the terms of the OpenSSL license
* See https://www.openssl.org/source/license.html for details
*/
#include "gost_grasshopper_cipher.h"
#include "gost_grasshopper_defines.h"
#include "gost_grasshopper_math.h"
#include "gost_grasshopper_core.h"
#include "e_gost_err.h"
#include "gost_lcl.h"
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/asn1.h>
#include <string.h>
#define T(e) if (!(e)) {\
ERR_print_errors_fp(stderr);\
OpenSSLDie(__FILE__, __LINE__, #e);\
}
#define cRED "\033[1;31m"
#define cDRED "\033[0;31m"
#define cGREEN "\033[1;32m"
#define cDGREEN "\033[0;32m"
#define cNORM "\033[m"
#define TEST_ASSERT(e) {if ((test = (e))) \
printf(cRED "Test FAILED\n" cNORM); \
else \
printf(cGREEN "Test passed\n" cNORM);}
/* Test key from both GOST R 34.12-2015 and GOST R 34.13-2015. */
static const unsigned char K[] = {
0x88,0x99,0xaa,0xbb,0xcc,0xdd,0xee,0xff,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,
0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,
};
/* Plaintext from GOST R 34.13-2015 A.1.
* First 16 bytes is vector (a) from GOST R 34.12-2015 A.1. */
static const unsigned char P[] = {
0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x00,0xff,0xee,0xdd,0xcc,0xbb,0xaa,0x99,0x88,
0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xee,0xff,0x0a,
0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xee,0xff,0x0a,0x00,
0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xee,0xff,0x0a,0x00,0x11,
};
/* Extended plaintext from tc26 acpkm Kuznyechik test vector */
static const unsigned char P_acpkm[] = {
0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x00,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,0x99,0x88,
0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xEE,0xFF,0x0A,
0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xEE,0xFF,0x0A,0x00,
0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xEE,0xFF,0x0A,0x00,0x11,
0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xEE,0xFF,0x0A,0x00,0x11,0x22,
0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xEE,0xFF,0x0A,0x00,0x11,0x22,0x33,
0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xEE,0xFF,0x0A,0x00,0x11,0x22,0x33,0x44,
};
static const unsigned char E_ecb[] = {
/* ECB test vectors from GOST R 34.13-2015 A.1.1 */
/* first 16 bytes is vector (b) from GOST R 34.12-2015 A.1 */
0x7f,0x67,0x9d,0x90,0xbe,0xbc,0x24,0x30,0x5a,0x46,0x8d,0x42,0xb9,0xd4,0xed,0xcd,
0xb4,0x29,0x91,0x2c,0x6e,0x00,0x32,0xf9,0x28,0x54,0x52,0xd7,0x67,0x18,0xd0,0x8b,
0xf0,0xca,0x33,0x54,0x9d,0x24,0x7c,0xee,0xf3,0xf5,0xa5,0x31,0x3b,0xd4,0xb1,0x57,
0xd0,0xb0,0x9c,0xcd,0xe8,0x30,0xb9,0xeb,0x3a,0x02,0xc4,0xc5,0xaa,0x8a,0xda,0x98,
};
static const unsigned char E_ctr[] = {
/* CTR test vectors from GOST R 34.13-2015 A.1.2 */
0xf1,0x95,0xd8,0xbe,0xc1,0x0e,0xd1,0xdb,0xd5,0x7b,0x5f,0xa2,0x40,0xbd,0xa1,0xb8,
0x85,0xee,0xe7,0x33,0xf6,0xa1,0x3e,0x5d,0xf3,0x3c,0xe4,0xb3,0x3c,0x45,0xde,0xe4,
0xa5,0xea,0xe8,0x8b,0xe6,0x35,0x6e,0xd3,0xd5,0xe8,0x77,0xf1,0x35,0x64,0xa3,0xa5,
0xcb,0x91,0xfa,0xb1,0xf2,0x0c,0xba,0xb6,0xd1,0xc6,0xd1,0x58,0x20,0xbd,0xba,0x73,
};
static const unsigned char E_acpkm[] = {
0xF1,0x95,0xD8,0xBE,0xC1,0x0E,0xD1,0xDB,0xD5,0x7B,0x5F,0xA2,0x40,0xBD,0xA1,0xB8,
0x85,0xEE,0xE7,0x33,0xF6,0xA1,0x3E,0x5D,0xF3,0x3C,0xE4,0xB3,0x3C,0x45,0xDE,0xE4,
0x4B,0xCE,0xEB,0x8F,0x64,0x6F,0x4C,0x55,0x00,0x17,0x06,0x27,0x5E,0x85,0xE8,0x00,
0x58,0x7C,0x4D,0xF5,0x68,0xD0,0x94,0x39,0x3E,0x48,0x34,0xAF,0xD0,0x80,0x50,0x46,
0xCF,0x30,0xF5,0x76,0x86,0xAE,0xEC,0xE1,0x1C,0xFC,0x6C,0x31,0x6B,0x8A,0x89,0x6E,
0xDF,0xFD,0x07,0xEC,0x81,0x36,0x36,0x46,0x0C,0x4F,0x3B,0x74,0x34,0x23,0x16,0x3E,
0x64,0x09,0xA9,0xC2,0x82,0xFA,0xC8,0xD4,0x69,0xD2,0x21,0xE7,0xFB,0xD6,0xDE,0x5D,
};
/*
* Other modes (ofb, cbc, cfb) is impossible to test to match GOST R
* 34.13-2015 test vectors exactly, due to these vectors having exceeding
* IV length value (m) = 256 bits, while openssl have hard-coded limit
* of maximum IV length of 128 bits (EVP_MAX_IV_LENGTH).
* Also, current grasshopper code having fixed IV length of 128 bits.
*
* Thus, new test vectors are generated with truncated 128-bit IV using
* canonical GOST implementation from TC26.
*/
static const unsigned char E_ofb[] = {
/* OFB test vector generated from canonical implementation */
0x81,0x80,0x0a,0x59,0xb1,0x84,0x2b,0x24,0xff,0x1f,0x79,0x5e,0x89,0x7a,0xbd,0x95,
0x77,0x91,0x46,0xdb,0x2d,0x93,0xa9,0x4e,0xd9,0x3c,0xf6,0x8b,0x32,0x39,0x7f,0x19,
0xe9,0x3c,0x9e,0x57,0x44,0x1d,0x87,0x05,0x45,0xf2,0x40,0x36,0xa5,0x8c,0xee,0xa3,
0xcf,0x3f,0x00,0x61,0xd5,0x64,0x23,0x54,0x5b,0x96,0x0d,0x86,0x4c,0xc8,0x68,0xda,
};
static const unsigned char E_cbc[] = {
/* CBC test vector generated from canonical implementation */
0x68,0x99,0x72,0xd4,0xa0,0x85,0xfa,0x4d,0x90,0xe5,0x2e,0x3d,0x6d,0x7d,0xcc,0x27,
0xab,0xf1,0x70,0xb2,0xb2,0x26,0xc3,0x01,0x0c,0xcf,0xa1,0x36,0xd6,0x59,0xcd,0xaa,
0xca,0x71,0x92,0x72,0xab,0x1d,0x43,0x8e,0x15,0x50,0x7d,0x52,0x1e,0xcd,0x55,0x22,
0xe0,0x11,0x08,0xff,0x8d,0x9d,0x3a,0x6d,0x8c,0xa2,0xa5,0x33,0xfa,0x61,0x4e,0x71,
};
static const unsigned char E_cfb[] = {
/* CFB test vector generated from canonical implementation */
0x81,0x80,0x0a,0x59,0xb1,0x84,0x2b,0x24,0xff,0x1f,0x79,0x5e,0x89,0x7a,0xbd,0x95,
0x68,0xc1,0xb9,0x9c,0x4d,0xf5,0x9c,0xc7,0x95,0x1e,0x37,0x39,0xb5,0xb3,0xcd,0xbf,
0x07,0x3f,0x4d,0xd2,0xd6,0xde,0xb3,0xcf,0xb0,0x26,0x54,0x5f,0x7a,0xf1,0xd8,0xe8,
0xe1,0xc8,0x52,0xe9,0xa8,0x56,0x71,0x62,0xdb,0xb5,0xda,0x7f,0x66,0xde,0xa9,0x26,
};
static const unsigned char iv_ctr[] = { 0x12,0x34,0x56,0x78,0x90,0xab,0xce,0xf0, 0,0,0,0,0,0,0,0 };
/* truncated to 128-bits IV */
static const unsigned char iv_128bit[] = { 0x12,0x34,0x56,0x78,0x90,0xab,0xce,0xf0,
0xa1,0xb2,0xc3,0xd4,0xe5,0xf0,0x01,0x12 };
struct testcase {
const char *name;
const EVP_CIPHER *(*type)(void);
int stream;
const unsigned char *plaintext;
const unsigned char *expected;
size_t size;
const unsigned char *iv;
size_t iv_size;
int acpkm;
};
static struct testcase testcases[] = {
{ "ecb", cipher_gost_grasshopper_ecb, 0, P, E_ecb, sizeof(P), NULL, 0, 0 },
{ "ctr", cipher_gost_grasshopper_ctr, 1, P, E_ctr, sizeof(P), iv_ctr, sizeof(iv_ctr), 0 },
{ "ctr-no-acpkm", cipher_gost_grasshopper_ctracpkm, 1, P, E_ctr, sizeof(P), iv_ctr, sizeof(iv_ctr), 0 },
{ "ctracpkm", cipher_gost_grasshopper_ctracpkm, 1, P_acpkm, E_acpkm, sizeof(P_acpkm), iv_ctr, sizeof(iv_ctr), 256 / 8 },
{ "ofb", cipher_gost_grasshopper_ofb, 1, P, E_ofb, sizeof(P), iv_128bit, sizeof(iv_128bit), 0 },
{ "cbc", cipher_gost_grasshopper_cbc, 0, P, E_cbc, sizeof(P), iv_128bit, sizeof(iv_128bit), 0 },
{ "cfb", cipher_gost_grasshopper_cfb, 0, P, E_cfb, sizeof(P), iv_128bit, sizeof(iv_128bit), 0 },
NULL
};
static void hexdump(const void *ptr, size_t len)
{
const unsigned char *p = ptr;
size_t i, j;
for (i = 0; i < len; i += j) {
for (j = 0; j < 16 && i + j < len; j++)
printf("%s%02x", j? "" : " ", p[i + j]);
}
printf("\n");
}
static int test_block(const EVP_CIPHER *type, const char *name,
const unsigned char *pt, const unsigned char *exp, size_t size,
const unsigned char *iv, size_t iv_size, int acpkm)
{
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
unsigned char c[size];
int outlen, tmplen;
int ret = 0, test;
OPENSSL_assert(ctx);
printf("Encryption test from GOST R 34.13-2015 [%s] \n", name);
/* test with single big chunk */
EVP_CIPHER_CTX_init(ctx);
T(EVP_CipherInit_ex(ctx, type, NULL, K, iv, 1));
T(EVP_CIPHER_CTX_set_padding(ctx, 0));
memset(c, 0, sizeof(c));
if (acpkm)
T(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_KEY_MESH, acpkm, NULL));
T(EVP_CipherUpdate(ctx, c, &outlen, pt, size));
T(EVP_CipherFinal_ex(ctx, c + outlen, &tmplen));
EVP_CIPHER_CTX_cleanup(ctx);
printf(" c[%d] = ", outlen);
hexdump(c, outlen);
TEST_ASSERT(outlen != size || memcmp(c, exp, size));
ret |= test;
/* test with small chunks of block size */
printf("Chunked encryption test from GOST R 34.13-2015 [%s] \n", name);
int blocks = size / GRASSHOPPER_BLOCK_SIZE;
int z;
EVP_CIPHER_CTX_init(ctx);
T(EVP_CipherInit_ex(ctx, type, NULL, K, iv, 1));
T(EVP_CIPHER_CTX_set_padding(ctx, 0));
memset(c, 0, sizeof(c));
if (acpkm)
T(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_KEY_MESH, acpkm, NULL));
for (z = 0; z < blocks; z++) {
int offset = z * GRASSHOPPER_BLOCK_SIZE;
int sz = GRASSHOPPER_BLOCK_SIZE;
T(EVP_CipherUpdate(ctx, c + offset, &outlen, pt + offset, sz));
}
outlen = z * GRASSHOPPER_BLOCK_SIZE;
T(EVP_CipherFinal_ex(ctx, c + outlen, &tmplen));
EVP_CIPHER_CTX_cleanup(ctx);
printf(" c[%d] = ", outlen);
hexdump(c, outlen);
TEST_ASSERT(outlen != size || memcmp(c, exp, size));
ret |= test;
/* test with single big chunk */
printf("Decryption test from GOST R 34.13-2015 [%s] \n", name);
EVP_CIPHER_CTX_init(ctx);
T(EVP_CipherInit_ex(ctx, type, NULL, K, iv, 0));
T(EVP_CIPHER_CTX_set_padding(ctx, 0));
memset(c, 0, sizeof(c));
if (acpkm)
T(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_KEY_MESH, acpkm, NULL));
T(EVP_CipherUpdate(ctx, c, &outlen, exp, size));
T(EVP_CipherFinal_ex(ctx, c + outlen, &tmplen));
EVP_CIPHER_CTX_cleanup(ctx);
EVP_CIPHER_CTX_free(ctx);
printf(" d[%d] = ", outlen);
hexdump(c, outlen);
TEST_ASSERT(outlen != size || memcmp(c, pt, size));
ret |= test;
return ret;
}
static int test_stream(const EVP_CIPHER *type, const char *name,
const unsigned char *pt, const unsigned char *exp, size_t size,
const unsigned char *iv, size_t iv_size, int acpkm)
{
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
int ret = 0, test;
int z;
OPENSSL_assert(ctx);
/* Cycle through all lengths from 1 upto maximum size */
printf("Stream encryption test from GOST R 34.13-2015 [%s] \n", name);
for (z = 1; z <= size; z++) {
unsigned char c[size];
int outlen, tmplen;
int sz = 0;
int i;
EVP_CIPHER_CTX_init(ctx);
EVP_CipherInit_ex(ctx, type, NULL, K, iv, 1);
EVP_CIPHER_CTX_set_padding(ctx, 0);
memset(c, 0xff, sizeof(c));
if (acpkm)
T(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_KEY_MESH, acpkm, NULL));
for (i = 0; i < size; i += z) {
if (i + z > size)
sz = size - i;
else
sz = z;
EVP_CipherUpdate(ctx, c + i, &outlen, pt + i, sz);
OPENSSL_assert(outlen == sz);
}
outlen = i - z + sz;
EVP_CipherFinal_ex(ctx, c + outlen, &tmplen);
EVP_CIPHER_CTX_cleanup(ctx);
test = outlen != size || memcmp(c, exp, size);
printf("%c", test ? 'E' : '+');
ret |= test;
}
printf("\n");
TEST_ASSERT(ret);
EVP_CIPHER_CTX_free(ctx);
return ret;
}
static int test_omac()
{
EVP_MD_CTX *ctx = EVP_MD_CTX_new();
unsigned char mac[] = { 0x33,0x6f,0x4d,0x29,0x60,0x59,0xfb,0xe3 };
unsigned char md_value[EVP_MAX_MD_SIZE];
unsigned int md_len;
int test;
OPENSSL_assert(ctx);
printf("OMAC test from GOST R 34.13-2015\n");
EVP_MD_CTX_init(ctx);
/* preload cbc cipher for omac set key */
EVP_add_cipher(cipher_gost_grasshopper_cbc());
T(EVP_DigestInit_ex(ctx, grasshopper_omac(), NULL));
if (EVP_MD_CTX_size(ctx) != sizeof(mac)) {
/* strip const out of EVP_MD_CTX_md() to
* overwrite output size, as test vector is 8 bytes */
printf("Resize result size from %d to %zu\n", EVP_MD_CTX_size(ctx), sizeof(mac));
T(EVP_MD_meth_set_result_size((EVP_MD *)EVP_MD_CTX_md(ctx), sizeof(mac)));
}
T(EVP_MD_meth_get_ctrl(EVP_MD_CTX_md(ctx))(ctx, EVP_MD_CTRL_SET_KEY, sizeof(K), (void *)K));
T(EVP_DigestUpdate(ctx, P, sizeof(P)));
T(EVP_DigestFinal_ex(ctx, md_value, &md_len));
EVP_MD_CTX_free(ctx);
printf(" MAC[%u] = ", md_len);
hexdump(md_value, md_len);
TEST_ASSERT(md_len != sizeof(mac) ||
memcmp(mac, md_value, md_len));
return test;
}
int main(int argc, char **argv)
{
int ret = 0;
const struct testcase *t;
for (t = testcases; t->name; t++) {
ret |= test_block(t->type(), t->name,
t->plaintext, t->expected, t->size,
t->iv, t->iv_size, t->acpkm);
if (t->stream)
ret |= test_stream(t->type(), t->name,
t->plaintext, t->expected, t->size,
t->iv, t->iv_size, t->acpkm);
}
ret |= test_omac();
if (ret)
printf(cDRED "= Some tests FAILED!\n" cNORM);
else
printf(cDGREEN "= All tests passed!\n" cNORM);
return ret;
}
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