mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
c77fb9af55
Signed-off-by: Milan Broz <gmazyland@gmail.com> Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20531)
155 lines
4.7 KiB
C
155 lines
4.7 KiB
C
/*
|
|
* Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License 2.0 (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 <stdio.h>
|
|
#include <openssl/core_names.h>
|
|
#include <openssl/crypto.h>
|
|
#include <openssl/kdf.h>
|
|
#include <openssl/params.h>
|
|
#include <openssl/thread.h>
|
|
|
|
/*
|
|
* Example showing how to use Argon2 KDF.
|
|
* See man EVP_KDF-ARGON2 for more information.
|
|
*
|
|
* test vector from
|
|
* https://datatracker.ietf.org/doc/html/rfc9106
|
|
*/
|
|
|
|
/*
|
|
* Hard coding a password into an application is very bad.
|
|
* It is done here solely for educational purposes.
|
|
*/
|
|
static unsigned char password[] = {
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
|
|
};
|
|
|
|
/*
|
|
* The salt is better not being hard coded too. Each password should have a
|
|
* different salt if possible. The salt is not considered secret information
|
|
* and is safe to store with an encrypted password.
|
|
*/
|
|
static unsigned char salt[] = {
|
|
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
|
|
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02
|
|
};
|
|
|
|
/*
|
|
* Optional secret for KDF
|
|
*/
|
|
static unsigned char secret[] = {
|
|
0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03
|
|
};
|
|
|
|
/*
|
|
* Optional additional data
|
|
*/
|
|
static unsigned char ad[] = {
|
|
0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
|
|
0x04, 0x04, 0x04, 0x04
|
|
};
|
|
|
|
/*
|
|
* Argon2 cost parameters
|
|
*/
|
|
static uint32_t memory_cost = 32;
|
|
static uint32_t iteration_cost = 3;
|
|
static uint32_t parallel_cost = 4;
|
|
|
|
static const unsigned char expected_output[] = {
|
|
0x0d, 0x64, 0x0d, 0xf5, 0x8d, 0x78, 0x76, 0x6c,
|
|
0x08, 0xc0, 0x37, 0xa3, 0x4a, 0x8b, 0x53, 0xc9,
|
|
0xd0, 0x1e, 0xf0, 0x45, 0x2d, 0x75, 0xb6, 0x5e,
|
|
0xb5, 0x25, 0x20, 0xe9, 0x6b, 0x01, 0xe6, 0x59
|
|
};
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int rv = EXIT_FAILURE;
|
|
EVP_KDF *kdf = NULL;
|
|
EVP_KDF_CTX *kctx = NULL;
|
|
unsigned char out[32];
|
|
OSSL_PARAM params[9], *p = params;
|
|
OSSL_LIB_CTX *library_context = NULL;
|
|
unsigned int threads;
|
|
|
|
library_context = OSSL_LIB_CTX_new();
|
|
if (library_context == NULL) {
|
|
fprintf(stderr, "OSSL_LIB_CTX_new() returned NULL\n");
|
|
goto end;
|
|
}
|
|
|
|
/* Fetch the key derivation function implementation */
|
|
kdf = EVP_KDF_fetch(library_context, "argon2id", NULL);
|
|
if (kdf == NULL) {
|
|
fprintf(stderr, "EVP_KDF_fetch() returned NULL\n");
|
|
goto end;
|
|
}
|
|
|
|
/* Create a context for the key derivation operation */
|
|
kctx = EVP_KDF_CTX_new(kdf);
|
|
if (kctx == NULL) {
|
|
fprintf(stderr, "EVP_KDF_CTX_new() returned NULL\n");
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* Thread support can be turned off; use serialization if we cannot
|
|
* set requested number of threads.
|
|
*/
|
|
threads = parallel_cost;
|
|
if (OSSL_set_max_threads(library_context, parallel_cost) != 1) {
|
|
uint64_t max_threads = OSSL_get_max_threads(library_context);
|
|
|
|
if (max_threads == 0)
|
|
threads = 1;
|
|
else if (max_threads < parallel_cost)
|
|
threads = max_threads;
|
|
}
|
|
|
|
/* Set password */
|
|
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD, password, sizeof(password));
|
|
/* Set salt */
|
|
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, salt, sizeof(salt));
|
|
/* Set optional additional data */
|
|
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_ARGON2_AD, ad, sizeof(ad));
|
|
/* Set optional secret */
|
|
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET, secret, sizeof(secret));
|
|
/* Set iteration count */
|
|
*p++ = OSSL_PARAM_construct_uint32(OSSL_KDF_PARAM_ITER, &iteration_cost);
|
|
/* Set threads performing derivation (can be decreased) */
|
|
*p++ = OSSL_PARAM_construct_uint(OSSL_KDF_PARAM_THREADS, &threads);
|
|
/* Set parallel cost */
|
|
*p++ = OSSL_PARAM_construct_uint32(OSSL_KDF_PARAM_ARGON2_LANES, ¶llel_cost);
|
|
/* Set memory requirement */
|
|
*p++ = OSSL_PARAM_construct_uint32(OSSL_KDF_PARAM_ARGON2_MEMCOST, &memory_cost);
|
|
*p = OSSL_PARAM_construct_end();
|
|
|
|
/* Derive the key */
|
|
if (EVP_KDF_derive(kctx, out, sizeof(out), params) != 1) {
|
|
fprintf(stderr, "EVP_KDF_derive() failed\n");
|
|
goto end;
|
|
}
|
|
|
|
if (CRYPTO_memcmp(expected_output, out, sizeof(expected_output)) != 0) {
|
|
fprintf(stderr, "Generated key does not match expected value\n");
|
|
goto end;
|
|
}
|
|
|
|
rv = EXIT_SUCCESS;
|
|
end:
|
|
EVP_KDF_CTX_free(kctx);
|
|
EVP_KDF_free(kdf);
|
|
OSSL_LIB_CTX_free(library_context);
|
|
return rv;
|
|
}
|