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73a3b967e9
Using test vector from RTC 7914 Fixes #14108 Reviewed-by: Shane Lontis <shane.lontis@oracle.com> (Merged from https://github.com/openssl/openssl/pull/16109)
121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/*
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* Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <openssl/core_names.h>
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#include <openssl/crypto.h>
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#include <openssl/kdf.h>
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#include <openssl/obj_mac.h>
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#include <openssl/params.h>
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/*
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* test vector from
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* https://datatracker.ietf.org/doc/html/rfc7914
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*/
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/*
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* Hard coding a password into an application is very bad.
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* It is done here solely for educational purposes.
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*/
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static unsigned char password[] = {
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'p', 'a', 's', 's', 'w', 'o', 'r', 'd'
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};
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/*
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* The salt is better not being hard coded too. Each password should have a
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* different salt if possible. The salt is not considered secret information
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* and is safe to store with an encrypted password.
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*/
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static unsigned char scrypt_salt[] = {
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'N', 'a', 'C', 'l'
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};
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/*
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* The SCRYPT parameters can be variable or hard coded. The disadvantage with
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* hard coding them is that they cannot easily be adjusted for future
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* technological improvements appear.
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*/
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static unsigned int scrypt_n = 1024;
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static unsigned int scrypt_r = 8;
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static unsigned int scrypt_p = 16;
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static const unsigned char expected_output[] = {
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0xfd, 0xba, 0xbe, 0x1c, 0x9d, 0x34, 0x72, 0x00,
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0x78, 0x56, 0xe7, 0x19, 0x0d, 0x01, 0xe9, 0xfe,
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0x7c, 0x6a, 0xd7, 0xcb, 0xc8, 0x23, 0x78, 0x30,
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0xe7, 0x73, 0x76, 0x63, 0x4b, 0x37, 0x31, 0x62,
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0x2e, 0xaf, 0x30, 0xd9, 0x2e, 0x22, 0xa3, 0x88,
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0x6f, 0xf1, 0x09, 0x27, 0x9d, 0x98, 0x30, 0xda,
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0xc7, 0x27, 0xaf, 0xb9, 0x4a, 0x83, 0xee, 0x6d,
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0x83, 0x60, 0xcb, 0xdf, 0xa2, 0xcc, 0x06, 0x40
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};
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int main(int argc, char **argv)
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{
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int rv = 1;
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EVP_KDF *kdf = NULL;
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EVP_KDF_CTX *kctx = NULL;
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unsigned char out[64];
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OSSL_PARAM params[6], *p = params;
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OSSL_LIB_CTX *library_context = NULL;
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library_context = OSSL_LIB_CTX_new();
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if (library_context == NULL) {
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fprintf(stderr, "OSSL_LIB_CTX_new() returned NULL\n");
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goto end;
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}
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/* Fetch the key derivation function implementation */
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kdf = EVP_KDF_fetch(library_context, "SCRYPT", NULL);
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if (kdf == NULL) {
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fprintf(stderr, "EVP_KDF_fetch() returned NULL\n");
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goto end;
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}
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/* Create a context for the key derivation operation */
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kctx = EVP_KDF_CTX_new(kdf);
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if (kctx == NULL) {
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fprintf(stderr, "EVP_KDF_CTX_new() returned NULL\n");
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goto end;
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}
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/* Set password */
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD, password,
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sizeof(password));
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/* Set salt */
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, scrypt_salt,
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sizeof(scrypt_salt));
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/* Set N (default 1048576) */
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*p++ = OSSL_PARAM_construct_uint(OSSL_KDF_PARAM_SCRYPT_N, &scrypt_n);
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/* Set R (default 8) */
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*p++ = OSSL_PARAM_construct_uint(OSSL_KDF_PARAM_SCRYPT_R, &scrypt_r);
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/* Set P (default 1) */
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*p++ = OSSL_PARAM_construct_uint(OSSL_KDF_PARAM_SCRYPT_P, &scrypt_p);
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*p = OSSL_PARAM_construct_end();
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/* Derive the key */
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if (EVP_KDF_derive(kctx, out, sizeof(out), params) != 1) {
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fprintf(stderr, "EVP_KDF_derive() failed\n");
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goto end;
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}
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if (CRYPTO_memcmp(expected_output, out, sizeof(expected_output)) != 0) {
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fprintf(stderr, "Generated key does not match expected value\n");
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goto end;
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}
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rv = 0;
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end:
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EVP_KDF_CTX_free(kctx);
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EVP_KDF_free(kdf);
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OSSL_LIB_CTX_free(library_context);
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return rv;
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}
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