1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*-
* Copyright 2022-2023 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
*/
/*
* Example showing how to load DSA params from raw data
* using EVP_PKEY_fromdata()
*/
#include <openssl/param_build.h>
#include <openssl/evp.h>
#include <openssl/core_names.h>
#include "dsa.inc"
int main(int argc, char **argv)
{
int ret = EXIT_FAILURE;
OSSL_LIB_CTX *libctx = NULL;
const char *propq = NULL;
EVP_PKEY_CTX *ctx = NULL;
EVP_PKEY *dsaparamkey = NULL;
OSSL_PARAM_BLD *bld = NULL;
OSSL_PARAM *params = NULL;
BIGNUM *p = NULL, *q = NULL, *g = NULL;
p = BN_bin2bn(dsa_p, sizeof(dsa_p), NULL);
q = BN_bin2bn(dsa_q, sizeof(dsa_q), NULL);
g = BN_bin2bn(dsa_g, sizeof(dsa_g), NULL);
if (p == NULL || q == NULL || g == NULL)
goto cleanup;
/* Use OSSL_PARAM_BLD if you need to handle BIGNUM Parameters */
bld = OSSL_PARAM_BLD_new();
if (bld == NULL)
goto cleanup;
if (!OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_FFC_P, p)
|| !OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_FFC_Q, q)
|| !OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_FFC_G, g))
goto cleanup;
params = OSSL_PARAM_BLD_to_param(bld);
if (params == NULL)
goto cleanup;
ctx = EVP_PKEY_CTX_new_from_name(libctx, "DSA", propq);
if (ctx == NULL) {
fprintf(stderr, "EVP_PKEY_CTX_new_from_name() failed\n");
goto cleanup;
}
if (EVP_PKEY_fromdata_init(ctx) <= 0
|| EVP_PKEY_fromdata(ctx, &dsaparamkey, EVP_PKEY_KEY_PARAMETERS, params) <= 0) {
fprintf(stderr, "EVP_PKEY_fromdata() failed\n");
goto cleanup;
}
if (!dsa_print_key(dsaparamkey, 0, libctx, propq))
goto cleanup;
ret = EXIT_SUCCESS;
cleanup:
EVP_PKEY_free(dsaparamkey);
EVP_PKEY_CTX_free(ctx);
OSSL_PARAM_free(params);
OSSL_PARAM_BLD_free(bld);
BN_free(g);
BN_free(q);
BN_free(p);
return ret;
}
|
