/*
* Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <stddef.h>
#include "internal/nelem.h"
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/rand_drbg.h>
#include <openssl/obj_mac.h>
#include "internal/thread_once.h"
#include "crypto/rand.h"
typedef struct test_ctx_st {
const unsigned char *entropy;
size_t entropylen;
int entropycnt;
const unsigned char *nonce;
size_t noncelen;
int noncecnt;
} TEST_CTX;
static int app_data_index = -1;
static CRYPTO_ONCE get_index_once = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(drbg_app_data_index_init)
{
app_data_index = RAND_DRBG_get_ex_new_index(0L, NULL, NULL, NULL, NULL);
return 1;
}
enum drbg_kat_type {
NO_RESEED,
PR_FALSE,
PR_TRUE
};
enum drbg_df {
USE_DF,
NO_DF,
NA
};
struct drbg_kat_no_reseed {
size_t count;
const unsigned char *entropyin;
const unsigned char *nonce;
const unsigned char *persstr;
const unsigned char *addin1;
const unsigned char *addin2;
const unsigned char *retbytes;
};
struct drbg_kat_pr_false {
size_t count;
const unsigned char *entropyin;
const unsigned char *nonce;
const unsigned char *persstr;
const unsigned char *entropyinreseed;
const unsigned char *addinreseed;
const unsigned char *addin1;
const unsigned char *addin2;
const unsigned char *retbytes;
};
struct drbg_kat_pr_true {
size_t count;
const unsigned char *entropyin;
const unsigned char *nonce;
const unsigned char *persstr;
const unsigned char *entropyinpr1;
const unsigned char *addin1;
const unsigned char *entropyinpr2;
const unsigned char *addin2;
const unsigned char *retbytes;
};
struct drbg_kat {
enum drbg_kat_type type;
enum drbg_df df;
int nid;
size_t entropyinlen;
size_t noncelen;
size_t persstrlen;
size_t addinlen;
size_t retbyteslen;
const void *t;
};
/*
* Excerpt from test/drbg_cavs_data.c
* DRBG test vectors from:
* https://csrc.nist.gov/projects/cryptographic-algorithm-validation-program/
*/
static const unsigned char kat1308_entropyin[] = {
0x7c, 0x5d, 0x90, 0x70, 0x3b, 0x8a, 0xc7, 0x0f, 0x23, 0x73, 0x24, 0x9c,
0xa7, 0x15, 0x41, 0x71, 0x7a, 0x31, 0xea, 0x32, 0xfc, 0x28, 0x0d, 0xd7,
0x5b, 0x09, 0x01, 0x98, 0x1b, 0xe2, 0xa5, 0x53, 0xd9, 0x05, 0x32, 0x97,
0xec, 0xbe, 0x86, 0xfd, 0x1c, 0x1c, 0x71, 0x4c, 0x52, 0x29, 0x9e, 0x52,
};
static const unsigned char kat1308_nonce[] = {0};
static const unsigned char kat1308_persstr[] = {
0xdc, 0x07, 0x2f, 0x68, 0xfa, 0x77, 0x03, 0x23, 0x42, 0xb0, 0xf5, 0xa2,
0xd9, 0xad, 0xa1, 0xd0, 0xad, 0xa2, 0x14, 0xb4, 0xd0, 0x8e, 0xfb, 0x39,
0xdd, 0xc2, 0xac, 0xfb, 0x98, 0xdf, 0x7f, 0xce, 0x4c, 0x75, 0x56, 0x45,
0xcd, 0x86, 0x93, 0x74, 0x90, 0x6e, 0xf6, 0x9e, 0x85, 0x7e, 0xfb, 0xc3,
};
static const unsigned char kat1308_addin0[] = {
0x52, 0x25, 0xc4, 0x2f, 0x03, 0xce, 0x29, 0x71, 0xc5, 0x0b, 0xc3, 0x4e,
0xad, 0x8d, 0x6f, 0x17, 0x82, 0xe1, 0xf3, 0xfd, 0xfd, 0x9b, 0x94, 0x9a,
0x1d, 0xac, 0xd0, 0xd4, 0x3f, 0x2b, 0xe3, 0xab, 0x7c, 0x3d, 0x3e, 0x5a,
0x68, 0xbb, 0xa4, 0x74, 0x68, 0x1a, 0xc6, 0x27, 0xff, 0xe0, 0xc0, 0x6c,
};
static const unsigned char kat1308_addin1[] = {
0xdc, 0x91, 0xd7, 0xb7, 0xb9, 0x94, 0x79, 0x0f, 0x06, 0xc4, 0x70, 0x19,
0x33, 0x25, 0x7c, 0x96, 0x01, 0xa0, 0x62, 0xb0, 0x50, 0xe6, 0xc0, 0x3a,
0x56, 0x8f, 0xc5, 0x50, 0x48, 0xc6, 0xf4, 0x49, 0xe5, 0x70, 0x16, 0x2e,
0xae, 0xf2, 0x99, 0xb4, 0x2d, 0x70, 0x18, 0x16, 0xcd, 0xe0, 0x24, 0xe4,
};
static const unsigned char kat1308_retbits[] = {
0xde, 0xf8, 0x91, 0x1b, 0xf1, 0xe1, 0xa9, 0x97, 0xd8, 0x61, 0x84, 0xe2,
0xdb, 0x83, 0x3e, 0x60, 0x45, 0xcd, 0xc8, 0x66, 0x93, 0x28, 0xc8, 0x92,
0xbc, 0x25, 0xae, 0xe8, 0xb0, 0xed, 0xed, 0x16, 0x3d, 0xa5, 0xf9, 0x0f,
0xb3, 0x72, 0x08, 0x84, 0xac, 0x3c, 0x3b, 0xaa, 0x5f, 0xf9, 0x7d, 0x63,
0x3e, 0xde, 0x59, 0x37, 0x0e, 0x40, 0x12, 0x2b, 0xbc, 0x6c, 0x96, 0x53,
0x26, 0x32, 0xd0, 0xb8,
};
static const struct drbg_kat_no_reseed kat1308_t = {
2, kat1308_entropyin, kat1308_nonce, kat1308_persstr,
kat1308_addin0, kat1308_addin1, kat1308_retbits
};
static const struct drbg_kat kat1308 = {
NO_RESEED, NO_DF, NID_aes_256_ctr, 48, 0, 48, 48, 64, &kat1308_t
};
static const unsigned char kat1465_entropyin[] = {
0xc9, 0x96, 0x3a, 0x15, 0x51, 0x76, 0x4f, 0xe0, 0x45, 0x82, 0x8a, 0x64,
0x87, 0xbe, 0xaa, 0xc0,
};
static const unsigned char kat1465_nonce[] = {
0x08, 0xcd, 0x69, 0x39, 0xf8, 0x58, 0x9a, 0x85,
};
static const unsigned char kat1465_persstr[] = {0};
static const unsigned char kat1465_entropyinreseed[] = {
0x16, 0xcc, 0x35, 0x15, 0xb1, 0x17, 0xf5, 0x33, 0x80, 0x9a, 0x80, 0xc5,
0x1f, 0x4b, 0x7b, 0x51,
};
static const unsigned char kat1465_addinreseed[] = {
0xf5, 0x3d, 0xf1, 0x2e, 0xdb, 0x28, 0x1c, 0x00, 0x7b, 0xcb, 0xb6, 0x12,
0x61, 0x9f, 0x26, 0x5f,
};
static const unsigned char kat1465_addin0[] = {
0xe2, 0x67, 0x06, 0x62, 0x09, 0xa7, 0xcf, 0xd6, 0x84, 0x8c, 0x20, 0xf6,
0x10, 0x5a, 0x73, 0x9c,
};
static const unsigned char kat1465_addin1[] = {
0x26, 0xfa, 0x50, 0xe1, 0xb3, 0xcb, 0x65, 0xed, 0xbc, 0x6d, 0xda, 0x18,
0x47, 0x99, 0x1f, 0xeb,
};
static const unsigned char kat1465_retbits[] = {
0xf9, 0x47, 0xc6, 0xb0, 0x58, 0xa8, 0x66, 0x8a, 0xf5, 0x2b, 0x2a, 0x6d,
0x4e, 0x24, 0x6f, 0x65, 0xbf, 0x51, 0x22, 0xbf, 0xe8, 0x8d, 0x6c, 0xeb,
0xf9, 0x68, 0x7f, 0xed, 0x3b, 0xdd, 0x6b, 0xd5, 0x28, 0x47, 0x56, 0x52,
0xda, 0x50, 0xf0, 0x90, 0x73, 0x95, 0x06, 0x58, 0xaf, 0x08, 0x98, 0x6e,
0x24, 0x18, 0xfd, 0x2f, 0x48, 0x72, 0x57, 0xd6, 0x59, 0xab, 0xe9, 0x41,
0x58, 0xdb, 0x27, 0xba,
};
static const struct drbg_kat_pr_false kat1465_t = {
9, kat1465_entropyin, kat1465_nonce, kat1465_persstr,
kat1465_entropyinreseed, kat1465_addinreseed, kat1465_addin0,
kat1465_addin1, kat1465_retbits
};
static const struct drbg_kat kat1465 = {
PR_FALSE, USE_DF, NID_aes_128_ctr, 16, 8, 0, 16, 64, &kat1465_t
};
static const unsigned char kat3146_entropyin[] = {
0xd7, 0x08, 0x42, 0x82, 0xc2, 0xd2, 0xd1, 0xde, 0x01, 0xb4, 0x36, 0xb3,
0x7f, 0xbd, 0xd3, 0xdd, 0xb3, 0xc4, 0x31, 0x4f, 0x8f, 0xa7, 0x10, 0xf4,
};
static const unsigned char kat3146_nonce[] = {
0x7b, 0x9e, 0xcd, 0x49, 0x4f, 0x46, 0xa0, 0x08, 0x32, 0xff, 0x2e, 0xc3,
0x50, 0x86, 0xca, 0xca,
};
static const unsigned char kat3146_persstr[] = {0};
static const unsigned char kat3146_entropyinpr1[] = {
0x68, 0xd0, 0x7b, 0xa4, 0xe7, 0x22, 0x19, 0xe6, 0xb6, 0x46, 0x6a, 0xda,
0x8e, 0x67, 0xea, 0x63, 0x3f, 0xaf, 0x2f, 0x6c, 0x9d, 0x5e, 0x48, 0x15,
};
static const unsigned char kat3146_addinpr1[] = {
0x70, 0x0f, 0x54, 0xf4, 0x53, 0xde, 0xca, 0x61, 0x5c, 0x49, 0x51, 0xd1,
0x41, 0xc4, 0xf1, 0x2f, 0x65, 0xfb, 0x7e, 0xbc, 0x9b, 0x14, 0xba, 0x90,
0x05, 0x33, 0x7e, 0x64, 0xb7, 0x2b, 0xaf, 0x99,
};
static const unsigned char kat3146_entropyinpr2[] = {
0xeb, 0x77, 0xb0, 0xe9, 0x2d, 0x31, 0xc8, 0x66, 0xc5, 0xc4, 0xa7, 0xf7,
0x6c, 0xb2, 0x74, 0x36, 0x4b, 0x25, 0x78, 0x04, 0xd8, 0xd7, 0xd2, 0x34,
};
static const unsigned char kat3146_addinpr2[] = {
0x05, 0xcd, 0x2a, 0x97, 0x5a, 0x5d, 0xfb, 0x98, 0xc1, 0xf1, 0x00, 0x0c,
0xed, 0xe6, 0x2a, 0xba, 0xf0, 0x89, 0x1f, 0x5a, 0x4f, 0xd7, 0x48, 0xb3,
0x24, 0xc0, 0x8a, 0x3d, 0x60, 0x59, 0x5d, 0xb6,
};
static const unsigned char kat3146_retbits[] = {
0x29, 0x94, 0xa4, 0xa8, 0x17, 0x3e, 0x62, 0x2f, 0x94, 0xdd, 0x40, 0x1f,
0xe3, 0x7e, 0x77, 0xd4, 0x38, 0xbc, 0x0e, 0x49, 0x46, 0xf6, 0x0e, 0x28,
0x91, 0xc6, 0x9c, 0xc4, 0xa6, 0xa1, 0xf8, 0x9a, 0x64, 0x5e, 0x99, 0x76,
0xd0, 0x2d, 0xee, 0xde, 0xe1, 0x2c, 0x93, 0x29, 0x4b, 0x12, 0xcf, 0x87,
0x03, 0x98, 0xb9, 0x74, 0x41, 0xdb, 0x3a, 0x49, 0x9f, 0x92, 0xd0, 0x45,
0xd4, 0x30, 0x73, 0xbb,
};
static const struct drbg_kat_pr_true kat3146_t = {
10, kat3146_entropyin, kat3146_nonce, kat3146_persstr,
kat3146_entropyinpr1, kat3146_addinpr1, kat3146_entropyinpr2,
kat3146_addinpr2, kat3146_retbits
};
static const struct drbg_kat kat3146 = {
PR_TRUE, USE_DF, NID_aes_192_ctr, 24, 16, 0, 32, 64, &kat3146_t
};
static const struct drbg_kat *drbg_test[] = { &kat1308, &kat1465, &kat3146 };
static const size_t drbg_test_nelem = OSSL_NELEM(drbg_test);
static size_t kat_entropy(RAND_DRBG *drbg, unsigned char **pout,
int entropy, size_t min_len, size_t max_len,
int prediction_resistance)
{
TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
t->entropycnt++;
*pout = (unsigned char *)t->entropy;
return t->entropylen;
}
static size_t kat_nonce(RAND_DRBG *drbg, unsigned char **pout,
int entropy, size_t min_len, size_t max_len)
{
TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
t->noncecnt++;
*pout = (unsigned char *)t->nonce;
return t->noncelen;
}
/*
* Do a single NO_RESEED KAT:
*
* Instantiate
* Generate Random Bits (pr=false)
* Generate Random Bits (pr=false)
* Uninstantiate
*
* Return 0 on failure.
*/
static int single_kat_no_reseed(const struct drbg_kat *td)
{
struct drbg_kat_no_reseed *data = (struct drbg_kat_no_reseed *)td->t;
RAND_DRBG *drbg = NULL;
unsigned char *buff = NULL;
unsigned int flags = 0;
int failures = 0;
TEST_CTX t;
if (td->df != USE_DF)
flags |= RAND_DRBG_FLAG_CTR_NO_DF;
if ((drbg = RAND_DRBG_new(td->nid, flags, NULL)) == NULL)
return 0;
if (!RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
kat_nonce, NULL)) {
failures++;
goto err;
}
memset(&t, 0, sizeof(t));
t.entropy = data->entropyin;
t.entropylen = td->entropyinlen;
t.nonce = data->nonce;
t.noncelen = td->noncelen;
RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
buff = OPENSSL_malloc(td->retbyteslen);
if (buff == NULL) {
failures++;
goto err;
}
if (!RAND_DRBG_instantiate(drbg, data->persstr, td->persstrlen)
|| !RAND_DRBG_generate(drbg, buff, td->retbyteslen, 0,
data->addin1, td->addinlen)
|| !RAND_DRBG_generate(drbg, buff, td->retbyteslen, 0,
data->addin2, td->addinlen)
|| memcmp(data->retbytes, buff,
td->retbyteslen) != 0)
failures++;
err:
OPENSSL_free(buff);
RAND_DRBG_uninstantiate(drbg);
RAND_DRBG_free(drbg);
return failures == 0;
}
/*-
* Do a single PR_FALSE KAT:
*
* Instantiate
* Reseed
* Generate Random Bits (pr=false)
* Generate Random Bits (pr=false)
* Uninstantiate
*
* Return 0 on failure.
*/
static int single_kat_pr_false(const struct drbg_kat *td)
{
struct drbg_kat_pr_false *data = (struct drbg_kat_pr_false *)td->t;
RAND_DRBG *drbg = NULL;
unsigned char *buff = NULL;
unsigned int flags = 0;
int failures = 0;
TEST_CTX t;
if (td->df != USE_DF)
flags |= RAND_DRBG_FLAG_CTR_NO_DF;
if ((drbg = RAND_DRBG_new(td->nid, flags, NULL)) == NULL)
return 0;
if (!RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
kat_nonce, NULL)) {
failures++;
goto err;
}
memset(&t, 0, sizeof(t));
t.entropy = data->entropyin;
t.entropylen = td->entropyinlen;
t.nonce = data->nonce;
t.noncelen = td->noncelen;
RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
buff = OPENSSL_malloc(td->retbyteslen);
if (buff == NULL) {
failures++;
goto err;
}
if (!RAND_DRBG_instantiate(drbg, data->persstr, td->persstrlen))
failures++;
t.entropy = data->entropyinreseed;
t.entropylen = td->entropyinlen;
if (!RAND_DRBG_reseed(drbg, data->addinreseed, td->addinlen, 0)
|| !RAND_DRBG_generate(drbg, buff, td->retbyteslen, 0,
data->addin1, td->addinlen)
|| !RAND_DRBG_generate(drbg, buff, td->retbyteslen, 0,
data->addin2, td->addinlen)
|| memcmp(data->retbytes, buff,
td->retbyteslen) != 0)
failures++;
err:
OPENSSL_free(buff);
RAND_DRBG_uninstantiate(drbg);
RAND_DRBG_free(drbg);
return failures == 0;
}
/*-
* Do a single PR_TRUE KAT:
*
* Instantiate
* Generate Random Bits (pr=true)
* Generate Random Bits (pr=true)
* Uninstantiate
*
* Return 0 on failure.
*/
static int single_kat_pr_true(const struct drbg_kat *td)
{
struct drbg_kat_pr_true *data = (struct drbg_kat_pr_true *)td->t;
RAND_DRBG *drbg = NULL;
unsigned char *buff = NULL;
unsigned int flags = 0;
int failures = 0;
TEST_CTX t;
if (td->df != USE_DF)
flags |= RAND_DRBG_FLAG_CTR_NO_DF;
if ((drbg = RAND_DRBG_new(td->nid, flags, NULL)) == NULL)
return 0;
if (!RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
kat_nonce, NULL)) {
failures++;
goto err;
}
memset(&t, 0, sizeof(t));
t.nonce = data->nonce;
t.noncelen = td->noncelen;
t.entropy = data->entropyin;
t.entropylen = td->entropyinlen;
RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
buff = OPENSSL_malloc(td->retbyteslen);
if (buff == NULL) {
failures++;
goto err;
}
if (!RAND_DRBG_instantiate(drbg, data->persstr, td->persstrlen))
failures++;
t.entropy = data->entropyinpr1;
t.entropylen = td->entropyinlen;
if (!RAND_DRBG_generate(drbg, buff, td->retbyteslen, 1,
data->addin1, td->addinlen))
failures++;
t.entropy = data->entropyinpr2;
t.entropylen = td->entropyinlen;
if (!RAND_DRBG_generate(drbg, buff, td->retbyteslen, 1,
data->addin2, td->addinlen)
|| memcmp(data->retbytes, buff,
td->retbyteslen) != 0)
failures++;
err:
OPENSSL_free(buff);
RAND_DRBG_uninstantiate(drbg);
RAND_DRBG_free(drbg);
return failures == 0;
}
static int test_kats(int i)
{
const struct drbg_kat *td = drbg_test[i];
int rv = 0;
switch (td->type) {
case NO_RESEED:
if (!single_kat_no_reseed(td))
goto err;
break;
case PR_FALSE:
if (!single_kat_pr_false(td))
goto err;
break;
case PR_TRUE:
if (!single_kat_pr_true(td))
goto err;
break;
default: /* cant happen */
goto err;
}
rv = 1;
err:
return rv;
}
/*-
* Do one expected-error test:
*
* Instantiate with no entropy supplied
*
* Return 0 on failure.
*/
static int test_drbg_sanity(const struct drbg_kat *td)
{
struct drbg_kat_pr_false *data = (struct drbg_kat_pr_false *)td->t;
RAND_DRBG *drbg = NULL;
unsigned int flags = 0;
int failures = 0;
TEST_CTX t;
if (td->df != USE_DF)
flags |= RAND_DRBG_FLAG_CTR_NO_DF;
if ((drbg = RAND_DRBG_new(td->nid, flags, NULL)) == NULL)
return 0;
if (!RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
kat_nonce, NULL)) {
failures++;
goto err;
}
memset(&t, 0, sizeof(t));
t.entropy = data->entropyin;
t.entropylen = 0; /* No entropy */
t.nonce = data->nonce;
t.noncelen = td->noncelen;
RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
ERR_set_mark();
/* This must fail. */
if (RAND_DRBG_instantiate(drbg, data->persstr, td->persstrlen))
failures++;
RAND_DRBG_uninstantiate(drbg);
ERR_pop_to_mark();
err:
RAND_DRBG_free(drbg);
return failures == 0;
}
int rand_drbg_selftest(void)
{
int i;
if (!RUN_ONCE(&get_index_once, drbg_app_data_index_init))
return 0;
for (i = 0; i < drbg_test_nelem; i++) {
if (test_kats(i) <= 0)
return 0;
}
if (test_drbg_sanity(&kat1465) <= 0)
return 0;
return 1;
}