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/* nettle, low-level cryptographics library
*
* Copyright (C) 2013 Red Hat
* Copyright (C) 2008 Free Software Foundation, Inc.
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
/* This is a known-answer test for the DRBG-CTR-AES.
*/
#include <config.h>
#include "errors.h"
#include <drbg-aes.h>
#include <string.h>
#include <stdio.h>
struct self_test_st {
const uint8_t entropy[DRBG_AES_SEED_SIZE];
const uint8_t pstring[32];
const uint8_t reseed[DRBG_AES_SEED_SIZE];
const uint8_t addtl[3][32];
const uint8_t res[64];
};
struct priv_st {
struct drbg_aes_ctx *ctx;
};
/* Run a Know-Answer-Test using a dedicated test context. */
int drbg_aes_self_test(void)
{
static const struct self_test_st tv[] = {
/*
* Test vector from NIST ACVP test framework that was
* successfully validated by ACVP server.
*/
{
.entropy = { 0xBE, 0x36, 0xDA, 0x22, 0xC5, 0xEE, 0xC2, 0x46,
0x88, 0xAF, 0xD5, 0xFB, 0xC7, 0x12, 0x98, 0x58,
0x32, 0xD0, 0x35, 0x89, 0x33, 0xF0, 0xFA, 0x2B,
0x1B, 0x0D, 0x02, 0xE9, 0x3A, 0x28, 0x5F, 0x06,
0x04, 0x3B, 0x97, 0x5F, 0xED, 0xD6, 0x2D, 0xC5,
0xD9, 0x76, 0x42, 0x06, 0xEC, 0x80, 0x55, 0xFB },
.pstring = { 0x50, 0xF9, 0x47, 0x14, 0x27, 0xF4, 0xA0, 0xAF,
0x30, 0x08, 0x74, 0x85, 0xC7, 0x94, 0xA3, 0x5D,
0x8F, 0x4F, 0x43, 0x52, 0x0C, 0xC0, 0x64, 0x47,
0xF8, 0xAD, 0xC7, 0xB2, 0x6C, 0x7F, 0x26, 0x6E },
.reseed = { 0x64, 0xDB, 0x9E, 0xC3, 0x45, 0x88, 0xED, 0x33,
0xC8, 0x4C, 0xE2, 0x87, 0x12, 0x9C, 0xCA, 0x02,
0x16, 0x41, 0xB5, 0x3B, 0xCB, 0x5F, 0x01, 0xAE,
0xA0, 0x01, 0xBB, 0x16, 0x44, 0x1B, 0x99, 0x82,
0x97, 0x84, 0x5B, 0x16, 0x58, 0xF3, 0xBD, 0xBE,
0x9A, 0xAB, 0x9F, 0xB7, 0xB2, 0x93, 0xBE, 0xA5 },
.addtl = {
{ 0x10, 0xDD, 0xBC, 0x33, 0x29, 0x10, 0x53, 0x4C,
0xA0, 0x10, 0x72, 0xBF, 0x4C, 0x55, 0xDD, 0x7C,
0x08, 0x5F, 0xDF, 0x40, 0xB6, 0x03, 0xF2, 0xBC,
0xEA, 0xAE, 0x08, 0x46, 0x61, 0x68, 0x91, 0xC9 },
{ 0x00, 0xB6, 0x84, 0xF7, 0xF3, 0x14, 0xC7, 0x80,
0x57, 0xA4, 0x8F, 0x48, 0xE5, 0xC9, 0x7F, 0x8D,
0x54, 0x88, 0x96, 0xDF, 0x94, 0x55, 0xB1, 0x1C,
0xFA, 0xCF, 0xE0, 0x4D, 0xAA, 0x01, 0xFA, 0x25 },
{ 0x97, 0x02, 0xDB, 0xCB, 0x85, 0x2A, 0xAA, 0x55,
0x96, 0xC7, 0xF8, 0xF3, 0xB3, 0x9B, 0xBC, 0xCA,
0xB5, 0xC1, 0x7C, 0x1C, 0x0D, 0x2F, 0x5B, 0x0E,
0x9B, 0xBA, 0xB4, 0xDD, 0x45, 0x90, 0xF2, 0x14 },
},
.res = { 0xfe, 0x78, 0x3c, 0x64, 0x98, 0xb8, 0x69, 0x1d,
0xb7, 0xd4, 0xfb, 0x71, 0xdb, 0x58, 0xd2, 0xee,
0x32, 0x63, 0xfd, 0xed, 0x78, 0xe7, 0x93, 0x13,
0x65, 0xd7, 0xf8, 0x6b, 0x71, 0x90, 0xfc, 0xf4,
0xa3, 0x29, 0xae, 0x0b, 0xca, 0x40, 0x23, 0x61,
0x6c, 0xa3, 0xf8, 0xc6, 0x75, 0x15, 0x38, 0x36,
0x11, 0x5c, 0xc0, 0x87, 0x8a, 0x9b, 0x91, 0xdb,
0x56, 0xb9, 0x06, 0x98, 0xc5, 0x78, 0x1a, 0x3a }
},
};
unsigned i, j;
struct drbg_aes_ctx test_ctx;
struct drbg_aes_ctx test_ctx2;
struct priv_st priv;
int ret, saved;
uint8_t *tmp;
unsigned char result[64];
memset(&priv, 0, sizeof(priv));
priv.ctx = &test_ctx;
/* Test the error handling of drbg_aes_init */
ret =
drbg_aes_init(&test_ctx, DRBG_AES_SEED_SIZE, tv[0].entropy,
DRBG_AES_SEED_SIZE*2, (void*)tv);
if (ret != 0) {
gnutls_assert();
return 0;
}
tmp = gnutls_malloc(MAX_DRBG_AES_GENERATE_SIZE+1);
if (tmp == NULL) {
gnutls_assert();
return 0;
}
for (i = 0; i < sizeof(tv) / sizeof(tv[0]); i++) {
/* CAVP test step 1: initialization with perso string */
ret = drbg_aes_init(&test_ctx,
sizeof(tv[i].entropy), tv[i].entropy,
sizeof(tv[i].pstring), tv[i].pstring);
if (ret == 0)
goto fail;
if (drbg_aes_is_seeded(&test_ctx) == 0)
goto fail;
/* CAVP test step 2: reseed with addtl information */
ret = drbg_aes_reseed(&test_ctx,
sizeof(tv[i].reseed), tv[i].reseed,
sizeof(tv[i].addtl[0]), tv[i].addtl[0]);
if (ret == 0)
goto fail;
/* CAVP test step 3: generate with addtl info, discard result */
if (drbg_aes_generate(&test_ctx, sizeof(result), result,
sizeof(tv[i].addtl[1]),
tv[i].addtl[1]) == 0)
goto fail;
/* CAVP test step 4: generate with addtl info */
if (drbg_aes_generate(&test_ctx, sizeof(result), result,
sizeof(tv[i].addtl[2]),
tv[i].addtl[2]) == 0)
goto fail;
if (memcmp(result, tv[i].res, sizeof(result)) != 0) {
goto fail;
}
/* test the error handling of drbg_aes_random() */
saved = test_ctx.reseed_counter;
test_ctx.reseed_counter = DRBG_AES_RESEED_TIME+1;
if (drbg_aes_random(&test_ctx, 16, result) != 0) {
gnutls_assert();
goto fail;
}
test_ctx.reseed_counter = saved;
ret = drbg_aes_random(&test_ctx, MAX_DRBG_AES_GENERATE_SIZE+1, tmp);
if (ret == 0) {
gnutls_assert();
goto fail;
}
/* test the low-level function */
ret = drbg_aes_generate(&test_ctx, MAX_DRBG_AES_GENERATE_SIZE+1, tmp, 0, NULL);
if (ret != 0) {
gnutls_assert();
goto fail;
}
/* Test of the reseed function for error handling */
ret =
drbg_aes_reseed(&test_ctx, DRBG_AES_SEED_SIZE*2,
(uint8_t*)tv, 0, NULL);
if (ret != 0)
goto fail;
ret =
drbg_aes_reseed(&test_ctx, DRBG_AES_SEED_SIZE,
tv[i].entropy, DRBG_AES_SEED_SIZE*2, (uint8_t*)tv);
if (ret != 0)
goto fail;
/* check whether reseed detection works */
if (i==0) {
ret =
drbg_aes_reseed(&test_ctx, DRBG_AES_SEED_SIZE,
tv[i].entropy, 0, NULL);
if (ret == 0)
goto fail;
saved = test_ctx.reseed_counter;
test_ctx.reseed_counter = DRBG_AES_RESEED_TIME-4;
for (j=0;j<5;j++) {
if (drbg_aes_random(&test_ctx, 1, result) == 0) {
gnutls_assert();
goto fail;
}
}
/* that should fail */
if (drbg_aes_random(&test_ctx, 1, result) != 0) {
gnutls_assert();
goto fail;
}
test_ctx.reseed_counter = saved;
}
/* test deinit, which is zeroize_key() */
memcpy(&test_ctx2, &test_ctx, sizeof(test_ctx));
zeroize_key(&test_ctx, sizeof(test_ctx));
if (memcmp(&test_ctx, &test_ctx2, sizeof(test_ctx)) == 0) {
gnutls_assert();
goto fail;
}
}
gnutls_free(tmp);
return 1;
fail:
free(tmp);
return 0;
}
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