1 | /*
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2 | * Copyright 2020-2022 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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5 | * this file except in compliance with the License. You can obtain a copy
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6 | * in the file LICENSE in the source distribution or at
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7 | * https://www.openssl.org/source/license.html
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8 | */
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9 |
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10 | /*
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11 | * RSA low level APIs are deprecated for public use, but still ok for
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12 | * internal use.
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13 | */
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14 | #include "internal/deprecated.h"
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15 |
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16 | #include <string.h>
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17 | #include <openssl/core_names.h>
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18 | #include <openssl/params.h>
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19 | #include <openssl/err.h>
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20 | #include <openssl/evp.h>
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21 | #ifndef FIPS_MODULE
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22 | # include <openssl/x509.h>
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23 | # include "crypto/asn1.h"
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24 | #endif
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25 | #include "internal/sizes.h"
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26 | #include "internal/param_build_set.h"
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27 | #include "crypto/rsa.h"
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28 | #include "rsa_local.h"
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29 |
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30 | /*
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31 | * The intention with the "backend" source file is to offer backend support
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32 | * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
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33 | * implementations alike.
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34 | */
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35 |
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36 | DEFINE_STACK_OF(BIGNUM)
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37 |
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38 | static int collect_numbers(STACK_OF(BIGNUM) *numbers,
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39 | const OSSL_PARAM params[], const char *names[])
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40 | {
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41 | const OSSL_PARAM *p = NULL;
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42 | int i;
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43 |
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44 | if (numbers == NULL)
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45 | return 0;
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46 |
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47 | for (i = 0; names[i] != NULL; i++){
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48 | p = OSSL_PARAM_locate_const(params, names[i]);
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49 | if (p != NULL) {
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50 | BIGNUM *tmp = NULL;
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51 |
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52 | if (!OSSL_PARAM_get_BN(p, &tmp))
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53 | return 0;
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54 | if (sk_BIGNUM_push(numbers, tmp) == 0) {
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55 | BN_clear_free(tmp);
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56 | return 0;
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57 | }
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58 | }
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59 | }
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60 |
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61 | return 1;
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62 | }
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63 |
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64 | int ossl_rsa_fromdata(RSA *rsa, const OSSL_PARAM params[], int include_private)
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65 | {
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66 | const OSSL_PARAM *param_n, *param_e, *param_d = NULL;
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67 | BIGNUM *n = NULL, *e = NULL, *d = NULL;
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68 | STACK_OF(BIGNUM) *factors = NULL, *exps = NULL, *coeffs = NULL;
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69 | int is_private = 0;
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70 |
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71 | if (rsa == NULL)
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72 | return 0;
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73 |
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74 | param_n = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_N);
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75 | param_e = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_E);
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76 | if (include_private)
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77 | param_d = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_D);
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78 |
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79 | if ((param_n != NULL && !OSSL_PARAM_get_BN(param_n, &n))
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80 | || (param_e != NULL && !OSSL_PARAM_get_BN(param_e, &e))
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81 | || (param_d != NULL && !OSSL_PARAM_get_BN(param_d, &d)))
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82 | goto err;
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83 |
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84 | is_private = (d != NULL);
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85 |
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86 | if (!RSA_set0_key(rsa, n, e, d))
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87 | goto err;
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88 | n = e = d = NULL;
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89 |
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90 | if (is_private) {
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91 | if (!collect_numbers(factors = sk_BIGNUM_new_null(), params,
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92 | ossl_rsa_mp_factor_names)
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93 | || !collect_numbers(exps = sk_BIGNUM_new_null(), params,
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94 | ossl_rsa_mp_exp_names)
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95 | || !collect_numbers(coeffs = sk_BIGNUM_new_null(), params,
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96 | ossl_rsa_mp_coeff_names))
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97 | goto err;
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98 |
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99 | /* It's ok if this private key just has n, e and d */
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100 | if (sk_BIGNUM_num(factors) != 0
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101 | && !ossl_rsa_set0_all_params(rsa, factors, exps, coeffs))
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102 | goto err;
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103 | }
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104 |
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105 |
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106 | sk_BIGNUM_free(factors);
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107 | sk_BIGNUM_free(exps);
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108 | sk_BIGNUM_free(coeffs);
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109 | return 1;
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110 |
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111 | err:
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112 | BN_free(n);
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113 | BN_free(e);
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114 | BN_free(d);
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115 | sk_BIGNUM_pop_free(factors, BN_free);
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116 | sk_BIGNUM_pop_free(exps, BN_free);
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117 | sk_BIGNUM_pop_free(coeffs, BN_free);
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118 | return 0;
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119 | }
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120 |
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121 | DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
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122 |
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123 | int ossl_rsa_todata(RSA *rsa, OSSL_PARAM_BLD *bld, OSSL_PARAM params[],
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124 | int include_private)
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125 | {
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126 | int ret = 0;
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127 | const BIGNUM *rsa_d = NULL, *rsa_n = NULL, *rsa_e = NULL;
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128 | STACK_OF(BIGNUM_const) *factors = sk_BIGNUM_const_new_null();
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129 | STACK_OF(BIGNUM_const) *exps = sk_BIGNUM_const_new_null();
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130 | STACK_OF(BIGNUM_const) *coeffs = sk_BIGNUM_const_new_null();
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131 |
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132 | if (rsa == NULL || factors == NULL || exps == NULL || coeffs == NULL)
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133 | goto err;
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134 |
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135 | RSA_get0_key(rsa, &rsa_n, &rsa_e, &rsa_d);
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136 | ossl_rsa_get0_all_params(rsa, factors, exps, coeffs);
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137 |
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138 | if (!ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_RSA_N, rsa_n)
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139 | || !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_RSA_E, rsa_e))
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140 | goto err;
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141 |
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142 | /* Check private key data integrity */
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143 | if (include_private && rsa_d != NULL) {
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144 | int numprimes = sk_BIGNUM_const_num(factors);
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145 | int numexps = sk_BIGNUM_const_num(exps);
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146 | int numcoeffs = sk_BIGNUM_const_num(coeffs);
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147 |
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148 | /*
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149 | * It's permissible to have zero primes, i.e. no CRT params.
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150 | * Otherwise, there must be at least two, as many exponents,
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151 | * and one coefficient less.
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152 | */
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153 | if (numprimes != 0
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154 | && (numprimes < 2 || numexps < 2 || numcoeffs < 1))
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155 | goto err;
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156 |
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157 | if (!ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_RSA_D,
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158 | rsa_d)
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159 | || !ossl_param_build_set_multi_key_bn(bld, params,
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160 | ossl_rsa_mp_factor_names,
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161 | factors)
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162 | || !ossl_param_build_set_multi_key_bn(bld, params,
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163 | ossl_rsa_mp_exp_names, exps)
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164 | || !ossl_param_build_set_multi_key_bn(bld, params,
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165 | ossl_rsa_mp_coeff_names,
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166 | coeffs))
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167 | goto err;
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168 | }
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169 |
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170 | #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
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171 | /* The acvp test results are not meant for export so check for bld == NULL */
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172 | if (bld == NULL)
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173 | ossl_rsa_acvp_test_get_params(rsa, params);
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174 | #endif
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175 | ret = 1;
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176 | err:
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177 | sk_BIGNUM_const_free(factors);
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178 | sk_BIGNUM_const_free(exps);
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179 | sk_BIGNUM_const_free(coeffs);
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180 | return ret;
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181 | }
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182 |
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183 | int ossl_rsa_pss_params_30_todata(const RSA_PSS_PARAMS_30 *pss,
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184 | OSSL_PARAM_BLD *bld, OSSL_PARAM params[])
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185 | {
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186 | if (!ossl_rsa_pss_params_30_is_unrestricted(pss)) {
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187 | int hashalg_nid = ossl_rsa_pss_params_30_hashalg(pss);
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188 | int maskgenalg_nid = ossl_rsa_pss_params_30_maskgenalg(pss);
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189 | int maskgenhashalg_nid = ossl_rsa_pss_params_30_maskgenhashalg(pss);
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190 | int saltlen = ossl_rsa_pss_params_30_saltlen(pss);
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191 | int default_hashalg_nid = ossl_rsa_pss_params_30_hashalg(NULL);
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192 | int default_maskgenalg_nid = ossl_rsa_pss_params_30_maskgenalg(NULL);
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193 | int default_maskgenhashalg_nid =
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194 | ossl_rsa_pss_params_30_maskgenhashalg(NULL);
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195 | const char *mdname =
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196 | (hashalg_nid == default_hashalg_nid
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197 | ? NULL : ossl_rsa_oaeppss_nid2name(hashalg_nid));
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198 | const char *mgfname =
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199 | (maskgenalg_nid == default_maskgenalg_nid
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200 | ? NULL : ossl_rsa_oaeppss_nid2name(maskgenalg_nid));
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201 | const char *mgf1mdname =
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202 | (maskgenhashalg_nid == default_maskgenhashalg_nid
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203 | ? NULL : ossl_rsa_oaeppss_nid2name(maskgenhashalg_nid));
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204 | const char *key_md = OSSL_PKEY_PARAM_RSA_DIGEST;
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205 | const char *key_mgf = OSSL_PKEY_PARAM_RSA_MASKGENFUNC;
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206 | const char *key_mgf1_md = OSSL_PKEY_PARAM_RSA_MGF1_DIGEST;
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207 | const char *key_saltlen = OSSL_PKEY_PARAM_RSA_PSS_SALTLEN;
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208 |
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209 | /*
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210 | * To ensure that the key isn't seen as unrestricted by the recipient,
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211 | * we make sure that at least one PSS-related parameter is passed, even
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212 | * if it has a default value; saltlen.
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213 | */
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214 | if ((mdname != NULL
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215 | && !ossl_param_build_set_utf8_string(bld, params, key_md, mdname))
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216 | || (mgfname != NULL
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217 | && !ossl_param_build_set_utf8_string(bld, params,
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218 | key_mgf, mgfname))
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219 | || (mgf1mdname != NULL
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220 | && !ossl_param_build_set_utf8_string(bld, params,
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221 | key_mgf1_md, mgf1mdname))
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222 | || (!ossl_param_build_set_int(bld, params, key_saltlen, saltlen)))
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223 | return 0;
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224 | }
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225 | return 1;
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226 | }
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227 |
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228 | int ossl_rsa_pss_params_30_fromdata(RSA_PSS_PARAMS_30 *pss_params,
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229 | int *defaults_set,
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230 | const OSSL_PARAM params[],
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231 | OSSL_LIB_CTX *libctx)
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232 | {
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233 | const OSSL_PARAM *param_md, *param_mgf, *param_mgf1md, *param_saltlen;
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234 | const OSSL_PARAM *param_propq;
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235 | const char *propq = NULL;
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236 | EVP_MD *md = NULL, *mgf1md = NULL;
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237 | int saltlen;
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238 | int ret = 0;
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239 |
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240 | if (pss_params == NULL)
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241 | return 0;
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242 | param_propq =
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243 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_DIGEST_PROPS);
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244 | param_md =
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245 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_DIGEST);
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246 | param_mgf =
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247 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_MASKGENFUNC);
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248 | param_mgf1md =
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249 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_MGF1_DIGEST);
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250 | param_saltlen =
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251 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_PSS_SALTLEN);
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252 |
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253 | if (param_propq != NULL) {
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254 | if (param_propq->data_type == OSSL_PARAM_UTF8_STRING)
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255 | propq = param_propq->data;
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256 | }
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257 | /*
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258 | * If we get any of the parameters, we know we have at least some
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259 | * restrictions, so we start by setting default values, and let each
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260 | * parameter override their specific restriction data.
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261 | */
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262 | if (!*defaults_set
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263 | && (param_md != NULL || param_mgf != NULL || param_mgf1md != NULL
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264 | || param_saltlen != NULL)) {
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265 | if (!ossl_rsa_pss_params_30_set_defaults(pss_params))
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266 | return 0;
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267 | *defaults_set = 1;
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268 | }
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269 |
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270 | if (param_mgf != NULL) {
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271 | int default_maskgenalg_nid = ossl_rsa_pss_params_30_maskgenalg(NULL);
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272 | const char *mgfname = NULL;
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273 |
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274 | if (param_mgf->data_type == OSSL_PARAM_UTF8_STRING)
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275 | mgfname = param_mgf->data;
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276 | else if (!OSSL_PARAM_get_utf8_ptr(param_mgf, &mgfname))
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277 | return 0;
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278 |
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279 | if (OPENSSL_strcasecmp(param_mgf->data,
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280 | ossl_rsa_mgf_nid2name(default_maskgenalg_nid)) != 0)
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281 | return 0;
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282 | }
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283 |
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284 | /*
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285 | * We're only interested in the NIDs that correspond to the MDs, so the
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286 | * exact propquery is unimportant in the EVP_MD_fetch() calls below.
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287 | */
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288 |
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289 | if (param_md != NULL) {
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290 | const char *mdname = NULL;
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291 |
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292 | if (param_md->data_type == OSSL_PARAM_UTF8_STRING)
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293 | mdname = param_md->data;
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294 | else if (!OSSL_PARAM_get_utf8_ptr(param_mgf, &mdname))
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295 | goto err;
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296 |
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297 | if ((md = EVP_MD_fetch(libctx, mdname, propq)) == NULL
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298 | || !ossl_rsa_pss_params_30_set_hashalg(pss_params,
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299 | ossl_rsa_oaeppss_md2nid(md)))
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300 | goto err;
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301 | }
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302 |
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303 | if (param_mgf1md != NULL) {
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304 | const char *mgf1mdname = NULL;
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305 |
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306 | if (param_mgf1md->data_type == OSSL_PARAM_UTF8_STRING)
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307 | mgf1mdname = param_mgf1md->data;
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308 | else if (!OSSL_PARAM_get_utf8_ptr(param_mgf, &mgf1mdname))
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309 | goto err;
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310 |
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311 | if ((mgf1md = EVP_MD_fetch(libctx, mgf1mdname, propq)) == NULL
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312 | || !ossl_rsa_pss_params_30_set_maskgenhashalg(
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313 | pss_params, ossl_rsa_oaeppss_md2nid(mgf1md)))
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314 | goto err;
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315 | }
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316 |
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317 | if (param_saltlen != NULL) {
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318 | if (!OSSL_PARAM_get_int(param_saltlen, &saltlen)
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319 | || !ossl_rsa_pss_params_30_set_saltlen(pss_params, saltlen))
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320 | goto err;
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321 | }
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322 |
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323 | ret = 1;
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324 |
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325 | err:
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326 | EVP_MD_free(md);
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327 | EVP_MD_free(mgf1md);
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328 | return ret;
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329 | }
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330 |
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331 | int ossl_rsa_is_foreign(const RSA *rsa)
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332 | {
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333 | #ifndef FIPS_MODULE
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334 | if (rsa->engine != NULL || RSA_get_method(rsa) != RSA_PKCS1_OpenSSL())
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335 | return 1;
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336 | #endif
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337 | return 0;
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338 | }
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339 |
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340 | static ossl_inline int rsa_bn_dup_check(BIGNUM **out, const BIGNUM *f)
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341 | {
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342 | if (f != NULL && (*out = BN_dup(f)) == NULL)
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343 | return 0;
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344 | return 1;
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345 | }
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346 |
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347 | RSA *ossl_rsa_dup(const RSA *rsa, int selection)
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348 | {
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349 | RSA *dupkey = NULL;
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350 | #ifndef FIPS_MODULE
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351 | int pnum, i;
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352 | #endif
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353 |
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354 | /* Do not try to duplicate foreign RSA keys */
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355 | if (ossl_rsa_is_foreign(rsa))
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356 | return NULL;
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357 |
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358 | if ((dupkey = ossl_rsa_new_with_ctx(rsa->libctx)) == NULL)
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359 | return NULL;
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360 |
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361 | /* public key */
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362 | if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
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363 | if (!rsa_bn_dup_check(&dupkey->n, rsa->n))
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364 | goto err;
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365 | if (!rsa_bn_dup_check(&dupkey->e, rsa->e))
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366 | goto err;
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367 | }
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368 |
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369 | if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
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370 |
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371 | /* private key */
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372 | if (!rsa_bn_dup_check(&dupkey->d, rsa->d))
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373 | goto err;
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374 |
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375 | /* factors and crt params */
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376 | if (!rsa_bn_dup_check(&dupkey->p, rsa->p))
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377 | goto err;
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378 | if (!rsa_bn_dup_check(&dupkey->q, rsa->q))
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379 | goto err;
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380 | if (!rsa_bn_dup_check(&dupkey->dmp1, rsa->dmp1))
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381 | goto err;
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382 | if (!rsa_bn_dup_check(&dupkey->dmq1, rsa->dmq1))
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383 | goto err;
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384 | if (!rsa_bn_dup_check(&dupkey->iqmp, rsa->iqmp))
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385 | goto err;
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386 | }
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387 |
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388 | dupkey->version = rsa->version;
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389 | dupkey->flags = rsa->flags;
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390 | /* we always copy the PSS parameters regardless of selection */
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391 | dupkey->pss_params = rsa->pss_params;
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392 |
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393 | #ifndef FIPS_MODULE
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394 | /* multiprime */
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395 | if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0
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396 | && (pnum = sk_RSA_PRIME_INFO_num(rsa->prime_infos)) > 0) {
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397 | dupkey->prime_infos = sk_RSA_PRIME_INFO_new_reserve(NULL, pnum);
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398 | if (dupkey->prime_infos == NULL)
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399 | goto err;
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400 | for (i = 0; i < pnum; i++) {
|
---|
401 | const RSA_PRIME_INFO *pinfo = NULL;
|
---|
402 | RSA_PRIME_INFO *duppinfo = NULL;
|
---|
403 |
|
---|
404 | if ((duppinfo = OPENSSL_zalloc(sizeof(*duppinfo))) == NULL) {
|
---|
405 | ERR_raise(ERR_LIB_RSA, ERR_R_MALLOC_FAILURE);
|
---|
406 | goto err;
|
---|
407 | }
|
---|
408 | /* push first so cleanup in error case works */
|
---|
409 | (void)sk_RSA_PRIME_INFO_push(dupkey->prime_infos, duppinfo);
|
---|
410 |
|
---|
411 | pinfo = sk_RSA_PRIME_INFO_value(rsa->prime_infos, i);
|
---|
412 | if (!rsa_bn_dup_check(&duppinfo->r, pinfo->r))
|
---|
413 | goto err;
|
---|
414 | if (!rsa_bn_dup_check(&duppinfo->d, pinfo->d))
|
---|
415 | goto err;
|
---|
416 | if (!rsa_bn_dup_check(&duppinfo->t, pinfo->t))
|
---|
417 | goto err;
|
---|
418 | }
|
---|
419 | if (!ossl_rsa_multip_calc_product(dupkey))
|
---|
420 | goto err;
|
---|
421 | }
|
---|
422 |
|
---|
423 | if (rsa->pss != NULL) {
|
---|
424 | dupkey->pss = RSA_PSS_PARAMS_dup(rsa->pss);
|
---|
425 | if (rsa->pss->maskGenAlgorithm != NULL
|
---|
426 | && dupkey->pss->maskGenAlgorithm == NULL) {
|
---|
427 | dupkey->pss->maskHash = ossl_x509_algor_mgf1_decode(rsa->pss->maskGenAlgorithm);
|
---|
428 | if (dupkey->pss->maskHash == NULL)
|
---|
429 | goto err;
|
---|
430 | }
|
---|
431 | }
|
---|
432 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_RSA,
|
---|
433 | &dupkey->ex_data, &rsa->ex_data))
|
---|
434 | goto err;
|
---|
435 | #endif
|
---|
436 |
|
---|
437 | return dupkey;
|
---|
438 |
|
---|
439 | err:
|
---|
440 | RSA_free(dupkey);
|
---|
441 | return NULL;
|
---|
442 | }
|
---|
443 |
|
---|
444 | #ifndef FIPS_MODULE
|
---|
445 | RSA_PSS_PARAMS *ossl_rsa_pss_decode(const X509_ALGOR *alg)
|
---|
446 | {
|
---|
447 | RSA_PSS_PARAMS *pss;
|
---|
448 |
|
---|
449 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
|
---|
450 | alg->parameter);
|
---|
451 |
|
---|
452 | if (pss == NULL)
|
---|
453 | return NULL;
|
---|
454 |
|
---|
455 | if (pss->maskGenAlgorithm != NULL) {
|
---|
456 | pss->maskHash = ossl_x509_algor_mgf1_decode(pss->maskGenAlgorithm);
|
---|
457 | if (pss->maskHash == NULL) {
|
---|
458 | RSA_PSS_PARAMS_free(pss);
|
---|
459 | return NULL;
|
---|
460 | }
|
---|
461 | }
|
---|
462 |
|
---|
463 | return pss;
|
---|
464 | }
|
---|
465 |
|
---|
466 | static int ossl_rsa_sync_to_pss_params_30(RSA *rsa)
|
---|
467 | {
|
---|
468 | const RSA_PSS_PARAMS *legacy_pss = NULL;
|
---|
469 | RSA_PSS_PARAMS_30 *pss = NULL;
|
---|
470 |
|
---|
471 | if (rsa != NULL
|
---|
472 | && (legacy_pss = RSA_get0_pss_params(rsa)) != NULL
|
---|
473 | && (pss = ossl_rsa_get0_pss_params_30(rsa)) != NULL) {
|
---|
474 | const EVP_MD *md = NULL, *mgf1md = NULL;
|
---|
475 | int md_nid, mgf1md_nid, saltlen, trailerField;
|
---|
476 | RSA_PSS_PARAMS_30 pss_params;
|
---|
477 |
|
---|
478 | /*
|
---|
479 | * We don't care about the validity of the fields here, we just
|
---|
480 | * want to synchronise values. Verifying here makes it impossible
|
---|
481 | * to even read a key with invalid values, making it hard to test
|
---|
482 | * a bad situation.
|
---|
483 | *
|
---|
484 | * Other routines use ossl_rsa_pss_get_param(), so the values will
|
---|
485 | * be checked, eventually.
|
---|
486 | */
|
---|
487 | if (!ossl_rsa_pss_get_param_unverified(legacy_pss, &md, &mgf1md,
|
---|
488 | &saltlen, &trailerField))
|
---|
489 | return 0;
|
---|
490 | md_nid = EVP_MD_get_type(md);
|
---|
491 | mgf1md_nid = EVP_MD_get_type(mgf1md);
|
---|
492 | if (!ossl_rsa_pss_params_30_set_defaults(&pss_params)
|
---|
493 | || !ossl_rsa_pss_params_30_set_hashalg(&pss_params, md_nid)
|
---|
494 | || !ossl_rsa_pss_params_30_set_maskgenhashalg(&pss_params,
|
---|
495 | mgf1md_nid)
|
---|
496 | || !ossl_rsa_pss_params_30_set_saltlen(&pss_params, saltlen)
|
---|
497 | || !ossl_rsa_pss_params_30_set_trailerfield(&pss_params,
|
---|
498 | trailerField))
|
---|
499 | return 0;
|
---|
500 | *pss = pss_params;
|
---|
501 | }
|
---|
502 | return 1;
|
---|
503 | }
|
---|
504 |
|
---|
505 | int ossl_rsa_pss_get_param_unverified(const RSA_PSS_PARAMS *pss,
|
---|
506 | const EVP_MD **pmd, const EVP_MD **pmgf1md,
|
---|
507 | int *psaltlen, int *ptrailerField)
|
---|
508 | {
|
---|
509 | RSA_PSS_PARAMS_30 pss_params;
|
---|
510 |
|
---|
511 | /* Get the defaults from the ONE place */
|
---|
512 | (void)ossl_rsa_pss_params_30_set_defaults(&pss_params);
|
---|
513 |
|
---|
514 | if (pss == NULL)
|
---|
515 | return 0;
|
---|
516 | *pmd = ossl_x509_algor_get_md(pss->hashAlgorithm);
|
---|
517 | if (*pmd == NULL)
|
---|
518 | return 0;
|
---|
519 | *pmgf1md = ossl_x509_algor_get_md(pss->maskHash);
|
---|
520 | if (*pmgf1md == NULL)
|
---|
521 | return 0;
|
---|
522 | if (pss->saltLength)
|
---|
523 | *psaltlen = ASN1_INTEGER_get(pss->saltLength);
|
---|
524 | else
|
---|
525 | *psaltlen = ossl_rsa_pss_params_30_saltlen(&pss_params);
|
---|
526 | if (pss->trailerField)
|
---|
527 | *ptrailerField = ASN1_INTEGER_get(pss->trailerField);
|
---|
528 | else
|
---|
529 | *ptrailerField = ossl_rsa_pss_params_30_trailerfield(&pss_params);;
|
---|
530 |
|
---|
531 | return 1;
|
---|
532 | }
|
---|
533 |
|
---|
534 | int ossl_rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
|
---|
535 | {
|
---|
536 | RSA_PSS_PARAMS *pss;
|
---|
537 | const ASN1_OBJECT *algoid;
|
---|
538 | const void *algp;
|
---|
539 | int algptype;
|
---|
540 |
|
---|
541 | X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
|
---|
542 | if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
|
---|
543 | return 1;
|
---|
544 | if (algptype == V_ASN1_UNDEF)
|
---|
545 | return 1;
|
---|
546 | if (algptype != V_ASN1_SEQUENCE) {
|
---|
547 | ERR_raise(ERR_LIB_RSA, RSA_R_INVALID_PSS_PARAMETERS);
|
---|
548 | return 0;
|
---|
549 | }
|
---|
550 | if ((pss = ossl_rsa_pss_decode(alg)) == NULL
|
---|
551 | || !ossl_rsa_set0_pss_params(rsa, pss)) {
|
---|
552 | RSA_PSS_PARAMS_free(pss);
|
---|
553 | return 0;
|
---|
554 | }
|
---|
555 | if (!ossl_rsa_sync_to_pss_params_30(rsa))
|
---|
556 | return 0;
|
---|
557 | return 1;
|
---|
558 | }
|
---|
559 |
|
---|
560 | RSA *ossl_rsa_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf,
|
---|
561 | OSSL_LIB_CTX *libctx, const char *propq)
|
---|
562 | {
|
---|
563 | const unsigned char *p;
|
---|
564 | RSA *rsa;
|
---|
565 | int pklen;
|
---|
566 | const X509_ALGOR *alg;
|
---|
567 |
|
---|
568 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8inf))
|
---|
569 | return 0;
|
---|
570 | rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
|
---|
571 | if (rsa == NULL) {
|
---|
572 | ERR_raise(ERR_LIB_RSA, ERR_R_RSA_LIB);
|
---|
573 | return NULL;
|
---|
574 | }
|
---|
575 | if (!ossl_rsa_param_decode(rsa, alg)) {
|
---|
576 | RSA_free(rsa);
|
---|
577 | return NULL;
|
---|
578 | }
|
---|
579 |
|
---|
580 | RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
|
---|
581 | switch (OBJ_obj2nid(alg->algorithm)) {
|
---|
582 | case EVP_PKEY_RSA:
|
---|
583 | RSA_set_flags(rsa, RSA_FLAG_TYPE_RSA);
|
---|
584 | break;
|
---|
585 | case EVP_PKEY_RSA_PSS:
|
---|
586 | RSA_set_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS);
|
---|
587 | break;
|
---|
588 | default:
|
---|
589 | /* Leave the type bits zero */
|
---|
590 | break;
|
---|
591 | }
|
---|
592 |
|
---|
593 | return rsa;
|
---|
594 | }
|
---|
595 | #endif
|
---|