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 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 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