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67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*-
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* Copyright 2022-2023 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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/*
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* Example showing how to generate DSA params using
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* FIPS 186-4 DSA FFC parameter generation.
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*/
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#include <openssl/evp.h>
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#include "dsa.inc"
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int main(int argc, char **argv)
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{
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int ret = EXIT_FAILURE;
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OSSL_LIB_CTX *libctx = NULL;
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const char *propq = NULL;
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EVP_PKEY_CTX *ctx = NULL;
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EVP_PKEY *dsaparamkey = NULL;
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OSSL_PARAM params[7];
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unsigned int pbits = 2048;
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unsigned int qbits = 256;
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int gindex = 42;
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ctx = EVP_PKEY_CTX_new_from_name(libctx, "DSA", propq);
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if (ctx == NULL)
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goto cleanup;
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/*
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* Demonstrate how to set optional DSA fields as params.
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* See doc/man7/EVP_PKEY-FFC.pod and doc/man7/EVP_PKEY-DSA.pod
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* for more information.
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*/
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params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE,
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"fips186_4", 0);
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params[1] = OSSL_PARAM_construct_uint(OSSL_PKEY_PARAM_FFC_PBITS, &pbits);
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params[2] = OSSL_PARAM_construct_uint(OSSL_PKEY_PARAM_FFC_QBITS, &qbits);
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params[3] = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_FFC_GINDEX, &gindex);
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params[4] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST,
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"SHA384", 0);
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params[5] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS,
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"provider=default", 0);
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params[6] = OSSL_PARAM_construct_end();
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/* Generate a dsa param key using optional params */
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if (EVP_PKEY_paramgen_init(ctx) <= 0
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|| EVP_PKEY_CTX_set_params(ctx, params) <= 0
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|| EVP_PKEY_paramgen(ctx, &dsaparamkey) <= 0) {
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fprintf(stderr, "DSA paramgen failed\n");
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goto cleanup;
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}
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if (!dsa_print_key(dsaparamkey, 0, libctx, propq))
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goto cleanup;
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ret = EXIT_SUCCESS;
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cleanup:
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EVP_PKEY_free(dsaparamkey);
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EVP_PKEY_CTX_free(ctx);
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return ret;
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}
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