1 | /*
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2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL license (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 | #include <stdio.h>
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11 | #include "internal/cryptlib.h"
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12 | #include <openssl/asn1t.h>
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13 | #include <openssl/x509.h>
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14 | #include <openssl/bn.h>
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15 | #include <openssl/cms.h>
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16 | #include "internal/asn1_int.h"
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17 | #include "internal/evp_int.h"
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18 | #include "rsa_locl.h"
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19 |
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20 | #ifndef OPENSSL_NO_CMS
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21 | static int rsa_cms_sign(CMS_SignerInfo *si);
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22 | static int rsa_cms_verify(CMS_SignerInfo *si);
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23 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
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24 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
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25 | #endif
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26 |
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27 | static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
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28 | {
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29 | unsigned char *penc = NULL;
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30 | int penclen;
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31 | penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
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32 | if (penclen <= 0)
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33 | return 0;
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34 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
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35 | V_ASN1_NULL, NULL, penc, penclen))
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36 | return 1;
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37 |
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38 | OPENSSL_free(penc);
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39 | return 0;
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40 | }
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41 |
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42 | static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
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43 | {
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44 | const unsigned char *p;
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45 | int pklen;
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46 | RSA *rsa = NULL;
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47 |
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48 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
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49 | return 0;
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50 | if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
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51 | RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
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52 | return 0;
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53 | }
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54 | EVP_PKEY_assign_RSA(pkey, rsa);
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55 | return 1;
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56 | }
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57 |
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58 | static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
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59 | {
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60 | if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
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61 | || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
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62 | return 0;
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63 | return 1;
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64 | }
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65 |
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66 | static int old_rsa_priv_decode(EVP_PKEY *pkey,
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67 | const unsigned char **pder, int derlen)
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68 | {
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69 | RSA *rsa;
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70 |
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71 | if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
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72 | RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
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73 | return 0;
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74 | }
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75 | EVP_PKEY_assign_RSA(pkey, rsa);
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76 | return 1;
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77 | }
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78 |
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79 | static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
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80 | {
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81 | return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
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82 | }
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83 |
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84 | static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
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85 | {
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86 | unsigned char *rk = NULL;
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87 | int rklen;
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88 | rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
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89 |
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90 | if (rklen <= 0) {
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91 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
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92 | return 0;
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93 | }
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94 |
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95 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
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96 | V_ASN1_NULL, NULL, rk, rklen)) {
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97 | RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
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98 | return 0;
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99 | }
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100 |
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101 | return 1;
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102 | }
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103 |
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104 | static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
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105 | {
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106 | const unsigned char *p;
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107 | int pklen;
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108 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
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109 | return 0;
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110 | return old_rsa_priv_decode(pkey, &p, pklen);
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111 | }
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112 |
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113 | static int int_rsa_size(const EVP_PKEY *pkey)
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114 | {
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115 | return RSA_size(pkey->pkey.rsa);
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116 | }
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117 |
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118 | static int rsa_bits(const EVP_PKEY *pkey)
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119 | {
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120 | return BN_num_bits(pkey->pkey.rsa->n);
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121 | }
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122 |
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123 | static int rsa_security_bits(const EVP_PKEY *pkey)
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124 | {
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125 | return RSA_security_bits(pkey->pkey.rsa);
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126 | }
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127 |
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128 | static void int_rsa_free(EVP_PKEY *pkey)
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129 | {
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130 | RSA_free(pkey->pkey.rsa);
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131 | }
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132 |
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133 | static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
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134 | {
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135 | char *str;
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136 | const char *s;
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137 | int ret = 0, mod_len = 0;
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138 |
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139 | if (x->n != NULL)
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140 | mod_len = BN_num_bits(x->n);
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141 |
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142 | if (!BIO_indent(bp, off, 128))
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143 | goto err;
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144 |
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145 | if (priv && x->d) {
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146 | if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
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147 | goto err;
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148 | str = "modulus:";
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149 | s = "publicExponent:";
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150 | } else {
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151 | if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
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152 | goto err;
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153 | str = "Modulus:";
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154 | s = "Exponent:";
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155 | }
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156 | if (!ASN1_bn_print(bp, str, x->n, NULL, off))
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157 | goto err;
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158 | if (!ASN1_bn_print(bp, s, x->e, NULL, off))
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159 | goto err;
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160 | if (priv) {
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161 | if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
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162 | goto err;
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163 | if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
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164 | goto err;
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165 | if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
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166 | goto err;
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167 | if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
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168 | goto err;
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169 | if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
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170 | goto err;
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171 | if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
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172 | goto err;
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173 | }
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174 | ret = 1;
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175 | err:
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176 | return (ret);
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177 | }
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178 |
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179 | static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
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180 | ASN1_PCTX *ctx)
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181 | {
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182 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
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183 | }
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184 |
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185 | static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
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186 | ASN1_PCTX *ctx)
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187 | {
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188 | return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
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189 | }
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190 |
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191 | /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
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192 | static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
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193 | {
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194 | if (alg == NULL)
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195 | return NULL;
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196 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
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197 | return NULL;
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198 | return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
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199 | alg->parameter);
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200 | }
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201 |
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202 | static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
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203 | X509_ALGOR **pmaskHash)
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204 | {
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205 | RSA_PSS_PARAMS *pss;
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206 |
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207 | *pmaskHash = NULL;
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208 |
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209 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
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210 | alg->parameter);
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211 |
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212 | if (!pss)
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213 | return NULL;
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214 |
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215 | *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
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216 |
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217 | return pss;
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218 | }
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219 |
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220 | static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
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221 | X509_ALGOR *maskHash, int indent)
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222 | {
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223 | int rv = 0;
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224 | if (!pss) {
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225 | if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
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226 | return 0;
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227 | return 1;
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228 | }
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229 | if (BIO_puts(bp, "\n") <= 0)
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230 | goto err;
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231 | if (!BIO_indent(bp, indent, 128))
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232 | goto err;
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233 | if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
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234 | goto err;
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235 |
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236 | if (pss->hashAlgorithm) {
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237 | if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
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238 | goto err;
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239 | } else if (BIO_puts(bp, "sha1 (default)") <= 0)
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240 | goto err;
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241 |
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242 | if (BIO_puts(bp, "\n") <= 0)
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243 | goto err;
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244 |
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245 | if (!BIO_indent(bp, indent, 128))
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246 | goto err;
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247 |
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248 | if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
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249 | goto err;
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250 | if (pss->maskGenAlgorithm) {
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251 | if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
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252 | goto err;
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253 | if (BIO_puts(bp, " with ") <= 0)
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254 | goto err;
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255 | if (maskHash) {
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256 | if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
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257 | goto err;
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258 | } else if (BIO_puts(bp, "INVALID") <= 0)
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259 | goto err;
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260 | } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
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261 | goto err;
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262 | BIO_puts(bp, "\n");
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263 |
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264 | if (!BIO_indent(bp, indent, 128))
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265 | goto err;
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266 | if (BIO_puts(bp, "Salt Length: 0x") <= 0)
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267 | goto err;
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268 | if (pss->saltLength) {
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269 | if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
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270 | goto err;
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271 | } else if (BIO_puts(bp, "14 (default)") <= 0)
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272 | goto err;
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273 | BIO_puts(bp, "\n");
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274 |
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275 | if (!BIO_indent(bp, indent, 128))
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276 | goto err;
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277 | if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
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278 | goto err;
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279 | if (pss->trailerField) {
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280 | if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
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281 | goto err;
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282 | } else if (BIO_puts(bp, "BC (default)") <= 0)
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283 | goto err;
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284 | BIO_puts(bp, "\n");
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285 |
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286 | rv = 1;
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287 |
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288 | err:
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289 | return rv;
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290 |
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291 | }
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292 |
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293 | static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
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294 | const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
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295 | {
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296 | if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
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297 | int rv;
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298 | RSA_PSS_PARAMS *pss;
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299 | X509_ALGOR *maskHash;
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300 | pss = rsa_pss_decode(sigalg, &maskHash);
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301 | rv = rsa_pss_param_print(bp, pss, maskHash, indent);
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302 | RSA_PSS_PARAMS_free(pss);
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303 | X509_ALGOR_free(maskHash);
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304 | if (!rv)
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305 | return 0;
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306 | } else if (!sig && BIO_puts(bp, "\n") <= 0)
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307 | return 0;
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308 | if (sig)
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309 | return X509_signature_dump(bp, sig, indent);
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310 | return 1;
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311 | }
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312 |
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313 | static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
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314 | {
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315 | X509_ALGOR *alg = NULL;
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316 | switch (op) {
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317 |
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318 | case ASN1_PKEY_CTRL_PKCS7_SIGN:
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319 | if (arg1 == 0)
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320 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
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321 | break;
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322 |
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323 | case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
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324 | if (arg1 == 0)
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325 | PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
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326 | break;
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327 | #ifndef OPENSSL_NO_CMS
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328 | case ASN1_PKEY_CTRL_CMS_SIGN:
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329 | if (arg1 == 0)
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330 | return rsa_cms_sign(arg2);
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331 | else if (arg1 == 1)
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332 | return rsa_cms_verify(arg2);
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333 | break;
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334 |
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335 | case ASN1_PKEY_CTRL_CMS_ENVELOPE:
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336 | if (arg1 == 0)
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337 | return rsa_cms_encrypt(arg2);
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338 | else if (arg1 == 1)
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339 | return rsa_cms_decrypt(arg2);
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340 | break;
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341 |
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342 | case ASN1_PKEY_CTRL_CMS_RI_TYPE:
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343 | *(int *)arg2 = CMS_RECIPINFO_TRANS;
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344 | return 1;
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345 | #endif
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346 |
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347 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
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348 | *(int *)arg2 = NID_sha256;
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349 | return 1;
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350 |
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351 | default:
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352 | return -2;
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353 |
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354 | }
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355 |
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356 | if (alg)
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357 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
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358 |
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359 | return 1;
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360 |
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361 | }
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362 |
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363 | /* allocate and set algorithm ID from EVP_MD, default SHA1 */
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364 | static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
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365 | {
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366 | if (EVP_MD_type(md) == NID_sha1)
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367 | return 1;
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368 | *palg = X509_ALGOR_new();
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369 | if (*palg == NULL)
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370 | return 0;
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371 | X509_ALGOR_set_md(*palg, md);
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372 | return 1;
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373 | }
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374 |
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375 | /* Allocate and set MGF1 algorithm ID from EVP_MD */
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376 | static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
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377 | {
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378 | X509_ALGOR *algtmp = NULL;
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379 | ASN1_STRING *stmp = NULL;
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380 | *palg = NULL;
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381 | if (EVP_MD_type(mgf1md) == NID_sha1)
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382 | return 1;
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383 | /* need to embed algorithm ID inside another */
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384 | if (!rsa_md_to_algor(&algtmp, mgf1md))
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385 | goto err;
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386 | if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
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387 | goto err;
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388 | *palg = X509_ALGOR_new();
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389 | if (*palg == NULL)
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390 | goto err;
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391 | X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
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392 | stmp = NULL;
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393 | err:
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394 | ASN1_STRING_free(stmp);
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395 | X509_ALGOR_free(algtmp);
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396 | if (*palg)
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397 | return 1;
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398 | return 0;
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399 | }
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400 |
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401 | /* convert algorithm ID to EVP_MD, default SHA1 */
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402 | static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
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403 | {
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404 | const EVP_MD *md;
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405 | if (!alg)
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406 | return EVP_sha1();
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407 | md = EVP_get_digestbyobj(alg->algorithm);
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408 | if (md == NULL)
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409 | RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
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410 | return md;
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411 | }
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412 |
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413 | /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
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414 | static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
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415 | {
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416 | const EVP_MD *md;
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417 | if (!alg)
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418 | return EVP_sha1();
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419 | /* Check mask and lookup mask hash algorithm */
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420 | if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
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421 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
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422 | return NULL;
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423 | }
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424 | if (!maskHash) {
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425 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
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426 | return NULL;
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427 | }
|
---|
428 | md = EVP_get_digestbyobj(maskHash->algorithm);
|
---|
429 | if (md == NULL) {
|
---|
430 | RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
|
---|
431 | return NULL;
|
---|
432 | }
|
---|
433 | return md;
|
---|
434 | }
|
---|
435 |
|
---|
436 | /*
|
---|
437 | * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
|
---|
438 | * suitable for setting an AlgorithmIdentifier.
|
---|
439 | */
|
---|
440 |
|
---|
441 | static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
|
---|
442 | {
|
---|
443 | const EVP_MD *sigmd, *mgf1md;
|
---|
444 | RSA_PSS_PARAMS *pss = NULL;
|
---|
445 | ASN1_STRING *os = NULL;
|
---|
446 | EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
|
---|
447 | int saltlen, rv = 0;
|
---|
448 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
|
---|
449 | goto err;
|
---|
450 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
|
---|
451 | goto err;
|
---|
452 | if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
|
---|
453 | goto err;
|
---|
454 | if (saltlen == -1)
|
---|
455 | saltlen = EVP_MD_size(sigmd);
|
---|
456 | else if (saltlen == -2) {
|
---|
457 | saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
|
---|
458 | if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
|
---|
459 | saltlen--;
|
---|
460 | }
|
---|
461 | pss = RSA_PSS_PARAMS_new();
|
---|
462 | if (pss == NULL)
|
---|
463 | goto err;
|
---|
464 | if (saltlen != 20) {
|
---|
465 | pss->saltLength = ASN1_INTEGER_new();
|
---|
466 | if (pss->saltLength == NULL)
|
---|
467 | goto err;
|
---|
468 | if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
|
---|
469 | goto err;
|
---|
470 | }
|
---|
471 | if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
|
---|
472 | goto err;
|
---|
473 | if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
|
---|
474 | goto err;
|
---|
475 | /* Finally create string with pss parameter encoding. */
|
---|
476 | if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
|
---|
477 | goto err;
|
---|
478 | rv = 1;
|
---|
479 | err:
|
---|
480 | RSA_PSS_PARAMS_free(pss);
|
---|
481 | if (rv)
|
---|
482 | return os;
|
---|
483 | ASN1_STRING_free(os);
|
---|
484 | return NULL;
|
---|
485 | }
|
---|
486 |
|
---|
487 | /*
|
---|
488 | * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
|
---|
489 | * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
|
---|
490 | * passed to pkctx instead.
|
---|
491 | */
|
---|
492 |
|
---|
493 | static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
|
---|
494 | X509_ALGOR *sigalg, EVP_PKEY *pkey)
|
---|
495 | {
|
---|
496 | int rv = -1;
|
---|
497 | int saltlen;
|
---|
498 | const EVP_MD *mgf1md = NULL, *md = NULL;
|
---|
499 | RSA_PSS_PARAMS *pss;
|
---|
500 | X509_ALGOR *maskHash;
|
---|
501 | /* Sanity check: make sure it is PSS */
|
---|
502 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
|
---|
503 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
|
---|
504 | return -1;
|
---|
505 | }
|
---|
506 | /* Decode PSS parameters */
|
---|
507 | pss = rsa_pss_decode(sigalg, &maskHash);
|
---|
508 |
|
---|
509 | if (pss == NULL) {
|
---|
510 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
|
---|
511 | goto err;
|
---|
512 | }
|
---|
513 | mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
|
---|
514 | if (!mgf1md)
|
---|
515 | goto err;
|
---|
516 | md = rsa_algor_to_md(pss->hashAlgorithm);
|
---|
517 | if (!md)
|
---|
518 | goto err;
|
---|
519 |
|
---|
520 | if (pss->saltLength) {
|
---|
521 | saltlen = ASN1_INTEGER_get(pss->saltLength);
|
---|
522 |
|
---|
523 | /*
|
---|
524 | * Could perform more salt length sanity checks but the main RSA
|
---|
525 | * routines will trap other invalid values anyway.
|
---|
526 | */
|
---|
527 | if (saltlen < 0) {
|
---|
528 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
|
---|
529 | goto err;
|
---|
530 | }
|
---|
531 | } else
|
---|
532 | saltlen = 20;
|
---|
533 |
|
---|
534 | /*
|
---|
535 | * low-level routines support only trailer field 0xbc (value 1) and
|
---|
536 | * PKCS#1 says we should reject any other value anyway.
|
---|
537 | */
|
---|
538 | if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
|
---|
539 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
|
---|
540 | goto err;
|
---|
541 | }
|
---|
542 |
|
---|
543 | /* We have all parameters now set up context */
|
---|
544 |
|
---|
545 | if (pkey) {
|
---|
546 | if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
|
---|
547 | goto err;
|
---|
548 | } else {
|
---|
549 | const EVP_MD *checkmd;
|
---|
550 | if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
|
---|
551 | goto err;
|
---|
552 | if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
|
---|
553 | RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
|
---|
554 | goto err;
|
---|
555 | }
|
---|
556 | }
|
---|
557 |
|
---|
558 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
|
---|
559 | goto err;
|
---|
560 |
|
---|
561 | if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
|
---|
562 | goto err;
|
---|
563 |
|
---|
564 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
|
---|
565 | goto err;
|
---|
566 | /* Carry on */
|
---|
567 | rv = 1;
|
---|
568 |
|
---|
569 | err:
|
---|
570 | RSA_PSS_PARAMS_free(pss);
|
---|
571 | X509_ALGOR_free(maskHash);
|
---|
572 | return rv;
|
---|
573 | }
|
---|
574 |
|
---|
575 | #ifndef OPENSSL_NO_CMS
|
---|
576 | static int rsa_cms_verify(CMS_SignerInfo *si)
|
---|
577 | {
|
---|
578 | int nid, nid2;
|
---|
579 | X509_ALGOR *alg;
|
---|
580 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
|
---|
581 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
|
---|
582 | nid = OBJ_obj2nid(alg->algorithm);
|
---|
583 | if (nid == NID_rsaEncryption)
|
---|
584 | return 1;
|
---|
585 | if (nid == NID_rsassaPss)
|
---|
586 | return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
|
---|
587 | /* Workaround for some implementation that use a signature OID */
|
---|
588 | if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
|
---|
589 | if (nid2 == NID_rsaEncryption)
|
---|
590 | return 1;
|
---|
591 | }
|
---|
592 | return 0;
|
---|
593 | }
|
---|
594 | #endif
|
---|
595 |
|
---|
596 | /*
|
---|
597 | * Customised RSA item verification routine. This is called when a signature
|
---|
598 | * is encountered requiring special handling. We currently only handle PSS.
|
---|
599 | */
|
---|
600 |
|
---|
601 | static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
---|
602 | X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
|
---|
603 | EVP_PKEY *pkey)
|
---|
604 | {
|
---|
605 | /* Sanity check: make sure it is PSS */
|
---|
606 | if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
|
---|
607 | RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
|
---|
608 | return -1;
|
---|
609 | }
|
---|
610 | if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
|
---|
611 | /* Carry on */
|
---|
612 | return 2;
|
---|
613 | }
|
---|
614 | return -1;
|
---|
615 | }
|
---|
616 |
|
---|
617 | #ifndef OPENSSL_NO_CMS
|
---|
618 | static int rsa_cms_sign(CMS_SignerInfo *si)
|
---|
619 | {
|
---|
620 | int pad_mode = RSA_PKCS1_PADDING;
|
---|
621 | X509_ALGOR *alg;
|
---|
622 | EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
|
---|
623 | ASN1_STRING *os = NULL;
|
---|
624 | CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
|
---|
625 | if (pkctx) {
|
---|
626 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
---|
627 | return 0;
|
---|
628 | }
|
---|
629 | if (pad_mode == RSA_PKCS1_PADDING) {
|
---|
630 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
|
---|
631 | return 1;
|
---|
632 | }
|
---|
633 | /* We don't support it */
|
---|
634 | if (pad_mode != RSA_PKCS1_PSS_PADDING)
|
---|
635 | return 0;
|
---|
636 | os = rsa_ctx_to_pss(pkctx);
|
---|
637 | if (!os)
|
---|
638 | return 0;
|
---|
639 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
|
---|
640 | return 1;
|
---|
641 | }
|
---|
642 | #endif
|
---|
643 |
|
---|
644 | static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
---|
645 | X509_ALGOR *alg1, X509_ALGOR *alg2,
|
---|
646 | ASN1_BIT_STRING *sig)
|
---|
647 | {
|
---|
648 | int pad_mode;
|
---|
649 | EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
|
---|
650 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
---|
651 | return 0;
|
---|
652 | if (pad_mode == RSA_PKCS1_PADDING)
|
---|
653 | return 2;
|
---|
654 | if (pad_mode == RSA_PKCS1_PSS_PADDING) {
|
---|
655 | ASN1_STRING *os1 = NULL;
|
---|
656 | os1 = rsa_ctx_to_pss(pkctx);
|
---|
657 | if (!os1)
|
---|
658 | return 0;
|
---|
659 | /* Duplicate parameters if we have to */
|
---|
660 | if (alg2) {
|
---|
661 | ASN1_STRING *os2 = ASN1_STRING_dup(os1);
|
---|
662 | if (!os2) {
|
---|
663 | ASN1_STRING_free(os1);
|
---|
664 | return 0;
|
---|
665 | }
|
---|
666 | X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
|
---|
667 | V_ASN1_SEQUENCE, os2);
|
---|
668 | }
|
---|
669 | X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
|
---|
670 | V_ASN1_SEQUENCE, os1);
|
---|
671 | return 3;
|
---|
672 | }
|
---|
673 | return 2;
|
---|
674 | }
|
---|
675 |
|
---|
676 | #ifndef OPENSSL_NO_CMS
|
---|
677 | static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
|
---|
678 | X509_ALGOR **pmaskHash)
|
---|
679 | {
|
---|
680 | RSA_OAEP_PARAMS *pss;
|
---|
681 |
|
---|
682 | *pmaskHash = NULL;
|
---|
683 |
|
---|
684 | pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
|
---|
685 | alg->parameter);
|
---|
686 |
|
---|
687 | if (!pss)
|
---|
688 | return NULL;
|
---|
689 |
|
---|
690 | *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
|
---|
691 |
|
---|
692 | return pss;
|
---|
693 | }
|
---|
694 |
|
---|
695 | static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
|
---|
696 | {
|
---|
697 | EVP_PKEY_CTX *pkctx;
|
---|
698 | X509_ALGOR *cmsalg;
|
---|
699 | int nid;
|
---|
700 | int rv = -1;
|
---|
701 | unsigned char *label = NULL;
|
---|
702 | int labellen = 0;
|
---|
703 | const EVP_MD *mgf1md = NULL, *md = NULL;
|
---|
704 | RSA_OAEP_PARAMS *oaep;
|
---|
705 | X509_ALGOR *maskHash;
|
---|
706 | pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
---|
707 | if (!pkctx)
|
---|
708 | return 0;
|
---|
709 | if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
|
---|
710 | return -1;
|
---|
711 | nid = OBJ_obj2nid(cmsalg->algorithm);
|
---|
712 | if (nid == NID_rsaEncryption)
|
---|
713 | return 1;
|
---|
714 | if (nid != NID_rsaesOaep) {
|
---|
715 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
|
---|
716 | return -1;
|
---|
717 | }
|
---|
718 | /* Decode OAEP parameters */
|
---|
719 | oaep = rsa_oaep_decode(cmsalg, &maskHash);
|
---|
720 |
|
---|
721 | if (oaep == NULL) {
|
---|
722 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
|
---|
723 | goto err;
|
---|
724 | }
|
---|
725 |
|
---|
726 | mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
|
---|
727 | if (!mgf1md)
|
---|
728 | goto err;
|
---|
729 | md = rsa_algor_to_md(oaep->hashFunc);
|
---|
730 | if (!md)
|
---|
731 | goto err;
|
---|
732 |
|
---|
733 | if (oaep->pSourceFunc) {
|
---|
734 | X509_ALGOR *plab = oaep->pSourceFunc;
|
---|
735 | if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
|
---|
736 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
|
---|
737 | goto err;
|
---|
738 | }
|
---|
739 | if (plab->parameter->type != V_ASN1_OCTET_STRING) {
|
---|
740 | RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
|
---|
741 | goto err;
|
---|
742 | }
|
---|
743 |
|
---|
744 | label = plab->parameter->value.octet_string->data;
|
---|
745 | /* Stop label being freed when OAEP parameters are freed */
|
---|
746 | plab->parameter->value.octet_string->data = NULL;
|
---|
747 | labellen = plab->parameter->value.octet_string->length;
|
---|
748 | }
|
---|
749 |
|
---|
750 | if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
|
---|
751 | goto err;
|
---|
752 | if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
|
---|
753 | goto err;
|
---|
754 | if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
|
---|
755 | goto err;
|
---|
756 | if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
|
---|
757 | goto err;
|
---|
758 | /* Carry on */
|
---|
759 | rv = 1;
|
---|
760 |
|
---|
761 | err:
|
---|
762 | RSA_OAEP_PARAMS_free(oaep);
|
---|
763 | X509_ALGOR_free(maskHash);
|
---|
764 | return rv;
|
---|
765 | }
|
---|
766 |
|
---|
767 | static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
|
---|
768 | {
|
---|
769 | const EVP_MD *md, *mgf1md;
|
---|
770 | RSA_OAEP_PARAMS *oaep = NULL;
|
---|
771 | ASN1_STRING *os = NULL;
|
---|
772 | X509_ALGOR *alg;
|
---|
773 | EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
|
---|
774 | int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
|
---|
775 | unsigned char *label;
|
---|
776 | CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
|
---|
777 | if (pkctx) {
|
---|
778 | if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
---|
779 | return 0;
|
---|
780 | }
|
---|
781 | if (pad_mode == RSA_PKCS1_PADDING) {
|
---|
782 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
|
---|
783 | return 1;
|
---|
784 | }
|
---|
785 | /* Not supported */
|
---|
786 | if (pad_mode != RSA_PKCS1_OAEP_PADDING)
|
---|
787 | return 0;
|
---|
788 | if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
|
---|
789 | goto err;
|
---|
790 | if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
|
---|
791 | goto err;
|
---|
792 | labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
|
---|
793 | if (labellen < 0)
|
---|
794 | goto err;
|
---|
795 | oaep = RSA_OAEP_PARAMS_new();
|
---|
796 | if (oaep == NULL)
|
---|
797 | goto err;
|
---|
798 | if (!rsa_md_to_algor(&oaep->hashFunc, md))
|
---|
799 | goto err;
|
---|
800 | if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
|
---|
801 | goto err;
|
---|
802 | if (labellen > 0) {
|
---|
803 | ASN1_OCTET_STRING *los;
|
---|
804 | oaep->pSourceFunc = X509_ALGOR_new();
|
---|
805 | if (oaep->pSourceFunc == NULL)
|
---|
806 | goto err;
|
---|
807 | los = ASN1_OCTET_STRING_new();
|
---|
808 | if (los == NULL)
|
---|
809 | goto err;
|
---|
810 | if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
|
---|
811 | ASN1_OCTET_STRING_free(los);
|
---|
812 | goto err;
|
---|
813 | }
|
---|
814 | X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
|
---|
815 | V_ASN1_OCTET_STRING, los);
|
---|
816 | }
|
---|
817 | /* create string with pss parameter encoding. */
|
---|
818 | if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
|
---|
819 | goto err;
|
---|
820 | X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
|
---|
821 | os = NULL;
|
---|
822 | rv = 1;
|
---|
823 | err:
|
---|
824 | RSA_OAEP_PARAMS_free(oaep);
|
---|
825 | ASN1_STRING_free(os);
|
---|
826 | return rv;
|
---|
827 | }
|
---|
828 | #endif
|
---|
829 |
|
---|
830 | const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
|
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831 | {
|
---|
832 | EVP_PKEY_RSA,
|
---|
833 | EVP_PKEY_RSA,
|
---|
834 | ASN1_PKEY_SIGPARAM_NULL,
|
---|
835 |
|
---|
836 | "RSA",
|
---|
837 | "OpenSSL RSA method",
|
---|
838 |
|
---|
839 | rsa_pub_decode,
|
---|
840 | rsa_pub_encode,
|
---|
841 | rsa_pub_cmp,
|
---|
842 | rsa_pub_print,
|
---|
843 |
|
---|
844 | rsa_priv_decode,
|
---|
845 | rsa_priv_encode,
|
---|
846 | rsa_priv_print,
|
---|
847 |
|
---|
848 | int_rsa_size,
|
---|
849 | rsa_bits,
|
---|
850 | rsa_security_bits,
|
---|
851 |
|
---|
852 | 0, 0, 0, 0, 0, 0,
|
---|
853 |
|
---|
854 | rsa_sig_print,
|
---|
855 | int_rsa_free,
|
---|
856 | rsa_pkey_ctrl,
|
---|
857 | old_rsa_priv_decode,
|
---|
858 | old_rsa_priv_encode,
|
---|
859 | rsa_item_verify,
|
---|
860 | rsa_item_sign},
|
---|
861 |
|
---|
862 | {
|
---|
863 | EVP_PKEY_RSA2,
|
---|
864 | EVP_PKEY_RSA,
|
---|
865 | ASN1_PKEY_ALIAS}
|
---|
866 | };
|
---|