1/* 2 * Copyright 2020-2021 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#include <stdlib.h> 11#include <openssl/core_names.h> 12#include <openssl/err.h> 13#include <openssl/dsa.h> 14#include <openssl/evp.h> 15#include "crypto/evp.h" 16 17static int dsa_paramgen_check(EVP_PKEY_CTX *ctx) 18{ 19 if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) { 20 ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); 21 /* Uses the same return values as EVP_PKEY_CTX_ctrl */ 22 return -2; 23 } 24 /* If key type not DSA return error */ 25 if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_DSA) 26 return -1; 27 return 1; 28} 29 30int EVP_PKEY_CTX_set_dsa_paramgen_type(EVP_PKEY_CTX *ctx, const char *name) 31{ 32 int ret; 33 OSSL_PARAM params[2], *p = params; 34 35 if ((ret = dsa_paramgen_check(ctx)) <= 0) 36 return ret; 37 38 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, 39 (char *)name, 0); 40 *p++ = OSSL_PARAM_construct_end(); 41 42 return EVP_PKEY_CTX_set_params(ctx, params); 43} 44 45int EVP_PKEY_CTX_set_dsa_paramgen_gindex(EVP_PKEY_CTX *ctx, int gindex) 46{ 47 int ret; 48 OSSL_PARAM params[2], *p = params; 49 50 if ((ret = dsa_paramgen_check(ctx)) <= 0) 51 return ret; 52 53 *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_FFC_GINDEX, &gindex); 54 *p++ = OSSL_PARAM_construct_end(); 55 56 return EVP_PKEY_CTX_set_params(ctx, params); 57} 58 59int EVP_PKEY_CTX_set_dsa_paramgen_seed(EVP_PKEY_CTX *ctx, 60 const unsigned char *seed, 61 size_t seedlen) 62{ 63 int ret; 64 OSSL_PARAM params[2], *p = params; 65 66 if ((ret = dsa_paramgen_check(ctx)) <= 0) 67 return ret; 68 69 *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_FFC_SEED, 70 (void *)seed, seedlen); 71 *p++ = OSSL_PARAM_construct_end(); 72 73 return EVP_PKEY_CTX_set_params(ctx, params); 74} 75 76int EVP_PKEY_CTX_set_dsa_paramgen_bits(EVP_PKEY_CTX *ctx, int nbits) 77{ 78 int ret; 79 OSSL_PARAM params[2], *p = params; 80 size_t bits = nbits; 81 82 if ((ret = dsa_paramgen_check(ctx)) <= 0) 83 return ret; 84 85 *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_PBITS, &bits); 86 *p++ = OSSL_PARAM_construct_end(); 87 88 return EVP_PKEY_CTX_set_params(ctx, params); 89} 90 91int EVP_PKEY_CTX_set_dsa_paramgen_q_bits(EVP_PKEY_CTX *ctx, int qbits) 92{ 93 int ret; 94 OSSL_PARAM params[2], *p = params; 95 size_t bits2 = qbits; 96 97 if ((ret = dsa_paramgen_check(ctx)) <= 0) 98 return ret; 99 100 *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_QBITS, &bits2); 101 *p++ = OSSL_PARAM_construct_end(); 102 103 return EVP_PKEY_CTX_set_params(ctx, params); 104} 105 106int EVP_PKEY_CTX_set_dsa_paramgen_md_props(EVP_PKEY_CTX *ctx, 107 const char *md_name, 108 const char *md_properties) 109{ 110 int ret; 111 OSSL_PARAM params[3], *p = params; 112 113 if ((ret = dsa_paramgen_check(ctx)) <= 0) 114 return ret; 115 116 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, 117 (char *)md_name, 0); 118 if (md_properties != NULL) 119 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, 120 (char *)md_properties, 0); 121 *p++ = OSSL_PARAM_construct_end(); 122 123 return EVP_PKEY_CTX_set_params(ctx, params); 124} 125 126#if !defined(FIPS_MODULE) 127int EVP_PKEY_CTX_set_dsa_paramgen_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) 128{ 129 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, 130 EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0, (void *)(md)); 131} 132#endif 133