2 * Copyright 1995-2020 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 dsa_generate_ffc_parameters(OPENSSL_CTX
*libctx
, DSA
*dsa
, int type
,
27 int pbits
, int qbits
, int gindex
,
33 const EVP_MD
*evpmd
= pbits
>= 2048 ? EVP_sha256() : EVP_sha1();
35 qbits
= EVP_MD_size(evpmd
) * 8;
37 dsa
->params
.gindex
= gindex
;
39 if (type
== DSA_PARAMGEN_TYPE_FIPS_186_2
)
40 ret
= ffc_params_FIPS186_2_generate(libctx
, &dsa
->params
,
42 pbits
, qbits
, NULL
, &res
, cb
);
45 ret
= ffc_params_FIPS186_4_generate(libctx
, &dsa
->params
,
47 pbits
, qbits
, NULL
, &res
, cb
);
53 int dsa_generate_parameters_ctx(OPENSSL_CTX
*libctx
, DSA
*dsa
, int bits
,
54 const unsigned char *seed_in
, int seed_len
,
55 int *counter_ret
, unsigned long *h_ret
,
59 if (dsa
->meth
->dsa_paramgen
)
60 return dsa
->meth
->dsa_paramgen(dsa
, bits
, seed_in
, seed_len
,
61 counter_ret
, h_ret
, cb
);
64 && !ffc_params_set_validate_params(&dsa
->params
, seed_in
, seed_len
, -1))
68 /* The old code used FIPS 186-2 DSA Parameter generation */
69 if (bits
<= 1024 && seed_len
== 20) {
70 if (!dsa_generate_ffc_parameters(libctx
, dsa
,
71 DSA_PARAMGEN_TYPE_FIPS_186_2
,
77 if (!dsa_generate_ffc_parameters(libctx
, dsa
,
78 DSA_PARAMGEN_TYPE_FIPS_186_4
,
83 if (counter_ret
!= NULL
)
84 *counter_ret
= dsa
->params
.pcounter
;
86 *h_ret
= dsa
->params
.h
;
90 int DSA_generate_parameters_ex(DSA
*dsa
, int bits
,
91 const unsigned char *seed_in
, int seed_len
,
92 int *counter_ret
, unsigned long *h_ret
,
95 return dsa_generate_parameters_ctx(NULL
, dsa
, bits
,
97 counter_ret
, h_ret
, cb
);