2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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
11 * DSA low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
16 #include <openssl/opensslconf.h>
18 #include "internal/cryptlib.h"
19 #include <openssl/evp.h>
20 #include <openssl/bn.h>
21 #include <openssl/rand.h>
22 #include <openssl/sha.h>
23 #include "crypto/dsa.h"
24 #include "dsa_local.h"
26 int ossl_dsa_generate_ffc_parameters(DSA
*dsa
, int type
, int pbits
, int qbits
,
32 if (type
== DSA_PARAMGEN_TYPE_FIPS_186_2
)
33 ret
= ossl_ffc_params_FIPS186_2_generate(dsa
->libctx
, &dsa
->params
,
35 pbits
, qbits
, &res
, cb
);
38 ret
= ossl_ffc_params_FIPS186_4_generate(dsa
->libctx
, &dsa
->params
,
40 pbits
, qbits
, &res
, cb
);
47 int DSA_generate_parameters_ex(DSA
*dsa
, int bits
,
48 const unsigned char *seed_in
, int seed_len
,
49 int *counter_ret
, unsigned long *h_ret
,
52 if (dsa
->meth
->dsa_paramgen
)
53 return dsa
->meth
->dsa_paramgen(dsa
, bits
, seed_in
, seed_len
,
54 counter_ret
, h_ret
, cb
);
56 && !ossl_ffc_params_set_validate_params(&dsa
->params
, seed_in
, seed_len
,
60 /* The old code used FIPS 186-2 DSA Parameter generation */
61 if (bits
<= 1024 && seed_len
== 20) {
62 if (!ossl_dsa_generate_ffc_parameters(dsa
, DSA_PARAMGEN_TYPE_FIPS_186_2
,
66 if (!ossl_dsa_generate_ffc_parameters(dsa
, DSA_PARAMGEN_TYPE_FIPS_186_4
,
71 if (counter_ret
!= NULL
)
72 *counter_ret
= dsa
->params
.pcounter
;
74 *h_ret
= dsa
->params
.h
;