1/*
2 * Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the >License>).  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <openssl/evp.h>
11#include <openssl/rand.h>
12#include <openssl/bio.h>
13#include <openssl/core_names.h>
14#include "testutil.h"
15
16static int test_rand(void)
17{
18    EVP_RAND_CTX *privctx;
19    OSSL_PARAM params[2], *p = params;
20    unsigned char entropy1[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
21    unsigned char entropy2[] = { 0xff, 0xfe, 0xfd };
22    unsigned char outbuf[3];
23
24    *p++ = OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
25                                             entropy1, sizeof(entropy1));
26    *p = OSSL_PARAM_construct_end();
27
28    if (!TEST_ptr(privctx = RAND_get0_private(NULL))
29            || !TEST_true(EVP_RAND_CTX_set_params(privctx, params))
30            || !TEST_int_gt(RAND_priv_bytes(outbuf, sizeof(outbuf)), 0)
31            || !TEST_mem_eq(outbuf, sizeof(outbuf), entropy1, sizeof(outbuf))
32            || !TEST_int_le(RAND_priv_bytes(outbuf, sizeof(outbuf) + 1), 0)
33            || !TEST_int_gt(RAND_priv_bytes(outbuf, sizeof(outbuf)), 0)
34            || !TEST_mem_eq(outbuf, sizeof(outbuf),
35                            entropy1 + sizeof(outbuf), sizeof(outbuf)))
36        return 0;
37
38    *params = OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
39                                                entropy2, sizeof(entropy2));
40    if (!TEST_true(EVP_RAND_CTX_set_params(privctx, params))
41            || !TEST_int_gt(RAND_priv_bytes(outbuf, sizeof(outbuf)), 0)
42            || !TEST_mem_eq(outbuf, sizeof(outbuf), entropy2, sizeof(outbuf)))
43        return 0;
44    return 1;
45}
46
47int setup_tests(void)
48{
49    if (!TEST_true(RAND_set_DRBG_type(NULL, "TEST-RAND", NULL, NULL, NULL)))
50        return 0;
51    ADD_TEST(test_rand);
52    return 1;
53}
54