1 /*
2 * Copyright 1995-2021 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 /*
11 * DSA low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <openssl/opensslconf.h>
17 #include <stdio.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"
25
ossl_dsa_generate_ffc_parameters(DSA * dsa,int type,int pbits,int qbits,BN_GENCB * cb)26 int ossl_dsa_generate_ffc_parameters(DSA *dsa, int type, int pbits, int qbits,
27 BN_GENCB *cb)
28 {
29 int ret = 0, res;
30
31 #ifndef FIPS_MODULE
32 if (type == DSA_PARAMGEN_TYPE_FIPS_186_2)
33 ret = ossl_ffc_params_FIPS186_2_generate(dsa->libctx, &dsa->params,
34 FFC_PARAM_TYPE_DSA,
35 pbits, qbits, &res, cb);
36 else
37 #endif
38 ret = ossl_ffc_params_FIPS186_4_generate(dsa->libctx, &dsa->params,
39 FFC_PARAM_TYPE_DSA,
40 pbits, qbits, &res, cb);
41 if (ret > 0)
42 dsa->dirty_cnt++;
43 return ret;
44 }
45
46 #ifndef FIPS_MODULE
DSA_generate_parameters_ex(DSA * dsa,int bits,const unsigned char * seed_in,int seed_len,int * counter_ret,unsigned long * h_ret,BN_GENCB * 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,
50 BN_GENCB *cb)
51 {
52 if (dsa->meth->dsa_paramgen)
53 return dsa->meth->dsa_paramgen(dsa, bits, seed_in, seed_len,
54 counter_ret, h_ret, cb);
55 if (seed_in != NULL
56 && !ossl_ffc_params_set_validate_params(&dsa->params, seed_in, seed_len,
57 -1))
58 return 0;
59
60 /* The old code used FIPS 186-2 DSA Parameter generation */
61 if (bits < 2048 && seed_len <= 20) {
62 if (!ossl_dsa_generate_ffc_parameters(dsa, DSA_PARAMGEN_TYPE_FIPS_186_2,
63 bits, 160, cb))
64 return 0;
65 } else {
66 if (!ossl_dsa_generate_ffc_parameters(dsa, DSA_PARAMGEN_TYPE_FIPS_186_4,
67 bits, 0, cb))
68 return 0;
69 }
70
71 if (counter_ret != NULL)
72 *counter_ret = dsa->params.pcounter;
73 if (h_ret != NULL)
74 *h_ret = dsa->params.h;
75 return 1;
76 }
77 #endif
78
