1 | /*
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2 | * Copyright 1995-2019 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/buffer.h>
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13 | #include <openssl/objects.h>
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14 | #include <openssl/evp.h>
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15 | #include <openssl/x509.h>
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16 | #include <openssl/pem.h>
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17 | #include <openssl/rsa.h>
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18 | #include <openssl/dsa.h>
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19 |
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20 | #ifndef OPENSSL_NO_STDIO
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21 | STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
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22 | pem_password_cb *cb, void *u)
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23 | {
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24 | BIO *b;
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25 | STACK_OF(X509_INFO) *ret;
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26 |
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27 | if ((b = BIO_new(BIO_s_file())) == NULL) {
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28 | PEMerr(PEM_F_PEM_X509_INFO_READ, ERR_R_BUF_LIB);
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29 | return 0;
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30 | }
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31 | BIO_set_fp(b, fp, BIO_NOCLOSE);
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32 | ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
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33 | BIO_free(b);
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34 | return ret;
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35 | }
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36 | #endif
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37 |
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38 | STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
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39 | pem_password_cb *cb, void *u)
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40 | {
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41 | X509_INFO *xi = NULL;
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42 | char *name = NULL, *header = NULL;
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43 | void *pp;
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44 | unsigned char *data = NULL;
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45 | const unsigned char *p;
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46 | long len, error = 0;
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47 | int ok = 0;
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48 | STACK_OF(X509_INFO) *ret = NULL;
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49 | unsigned int i, raw, ptype;
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50 | d2i_of_void *d2i = 0;
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51 |
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52 | if (sk == NULL) {
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53 | if ((ret = sk_X509_INFO_new_null()) == NULL) {
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54 | PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_MALLOC_FAILURE);
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55 | goto err;
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56 | }
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57 | } else
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58 | ret = sk;
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59 |
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60 | if ((xi = X509_INFO_new()) == NULL)
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61 | goto err;
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62 | for (;;) {
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63 | raw = 0;
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64 | ptype = 0;
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65 | i = PEM_read_bio(bp, &name, &header, &data, &len);
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66 | if (i == 0) {
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67 | error = ERR_GET_REASON(ERR_peek_last_error());
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68 | if (error == PEM_R_NO_START_LINE) {
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69 | ERR_clear_error();
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70 | break;
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71 | }
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72 | goto err;
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73 | }
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74 | start:
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75 | if ((strcmp(name, PEM_STRING_X509) == 0) ||
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76 | (strcmp(name, PEM_STRING_X509_OLD) == 0)) {
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77 | d2i = (D2I_OF(void)) d2i_X509;
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78 | if (xi->x509 != NULL) {
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79 | if (!sk_X509_INFO_push(ret, xi))
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80 | goto err;
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81 | if ((xi = X509_INFO_new()) == NULL)
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82 | goto err;
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83 | goto start;
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84 | }
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85 | pp = &(xi->x509);
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86 | } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
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87 | d2i = (D2I_OF(void)) d2i_X509_AUX;
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88 | if (xi->x509 != NULL) {
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89 | if (!sk_X509_INFO_push(ret, xi))
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90 | goto err;
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91 | if ((xi = X509_INFO_new()) == NULL)
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92 | goto err;
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93 | goto start;
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94 | }
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95 | pp = &(xi->x509);
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96 | } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
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97 | d2i = (D2I_OF(void)) d2i_X509_CRL;
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98 | if (xi->crl != NULL) {
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99 | if (!sk_X509_INFO_push(ret, xi))
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100 | goto err;
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101 | if ((xi = X509_INFO_new()) == NULL)
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102 | goto err;
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103 | goto start;
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104 | }
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105 | pp = &(xi->crl);
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106 | } else
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107 | #ifndef OPENSSL_NO_RSA
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108 | if (strcmp(name, PEM_STRING_RSA) == 0) {
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109 | d2i = (D2I_OF(void)) d2i_RSAPrivateKey;
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110 | if (xi->x_pkey != NULL) {
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111 | if (!sk_X509_INFO_push(ret, xi))
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112 | goto err;
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113 | if ((xi = X509_INFO_new()) == NULL)
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114 | goto err;
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115 | goto start;
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116 | }
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117 |
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118 | xi->enc_data = NULL;
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119 | xi->enc_len = 0;
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120 |
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121 | xi->x_pkey = X509_PKEY_new();
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122 | if (xi->x_pkey == NULL)
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123 | goto err;
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124 | ptype = EVP_PKEY_RSA;
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125 | pp = &xi->x_pkey->dec_pkey;
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126 | if ((int)strlen(header) > 10) /* assume encrypted */
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127 | raw = 1;
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128 | } else
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129 | #endif
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130 | #ifndef OPENSSL_NO_DSA
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131 | if (strcmp(name, PEM_STRING_DSA) == 0) {
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132 | d2i = (D2I_OF(void)) d2i_DSAPrivateKey;
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133 | if (xi->x_pkey != NULL) {
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134 | if (!sk_X509_INFO_push(ret, xi))
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135 | goto err;
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136 | if ((xi = X509_INFO_new()) == NULL)
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137 | goto err;
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138 | goto start;
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139 | }
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140 |
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141 | xi->enc_data = NULL;
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142 | xi->enc_len = 0;
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143 |
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144 | xi->x_pkey = X509_PKEY_new();
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145 | if (xi->x_pkey == NULL)
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146 | goto err;
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147 | ptype = EVP_PKEY_DSA;
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148 | pp = &xi->x_pkey->dec_pkey;
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149 | if ((int)strlen(header) > 10) /* assume encrypted */
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150 | raw = 1;
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151 | } else
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152 | #endif
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153 | #ifndef OPENSSL_NO_EC
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154 | if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
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155 | d2i = (D2I_OF(void)) d2i_ECPrivateKey;
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156 | if (xi->x_pkey != NULL) {
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157 | if (!sk_X509_INFO_push(ret, xi))
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158 | goto err;
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159 | if ((xi = X509_INFO_new()) == NULL)
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160 | goto err;
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161 | goto start;
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162 | }
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163 |
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164 | xi->enc_data = NULL;
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165 | xi->enc_len = 0;
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166 |
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167 | xi->x_pkey = X509_PKEY_new();
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168 | if (xi->x_pkey == NULL)
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169 | goto err;
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170 | ptype = EVP_PKEY_EC;
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171 | pp = &xi->x_pkey->dec_pkey;
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172 | if ((int)strlen(header) > 10) /* assume encrypted */
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173 | raw = 1;
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174 | } else
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175 | #endif
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176 | {
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177 | d2i = NULL;
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178 | pp = NULL;
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179 | }
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180 |
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181 | if (d2i != NULL) {
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182 | if (!raw) {
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183 | EVP_CIPHER_INFO cipher;
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184 |
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185 | if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
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186 | goto err;
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187 | if (!PEM_do_header(&cipher, data, &len, cb, u))
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188 | goto err;
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189 | p = data;
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190 | if (ptype) {
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191 | if (!d2i_PrivateKey(ptype, pp, &p, len)) {
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192 | PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
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193 | goto err;
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194 | }
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195 | } else if (d2i(pp, &p, len) == NULL) {
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196 | PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
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197 | goto err;
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198 | }
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199 | } else { /* encrypted RSA data */
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200 | if (!PEM_get_EVP_CIPHER_INFO(header, &xi->enc_cipher))
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201 | goto err;
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202 | xi->enc_data = (char *)data;
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203 | xi->enc_len = (int)len;
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204 | data = NULL;
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205 | }
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206 | } else {
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207 | /* unknown */
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208 | }
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209 | OPENSSL_free(name);
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210 | name = NULL;
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211 | OPENSSL_free(header);
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212 | header = NULL;
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213 | OPENSSL_free(data);
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214 | data = NULL;
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215 | }
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216 |
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217 | /*
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218 | * if the last one hasn't been pushed yet and there is anything in it
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219 | * then add it to the stack ...
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220 | */
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221 | if ((xi->x509 != NULL) || (xi->crl != NULL) ||
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222 | (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
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223 | if (!sk_X509_INFO_push(ret, xi))
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224 | goto err;
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225 | xi = NULL;
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226 | }
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227 | ok = 1;
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228 | err:
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229 | X509_INFO_free(xi);
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230 | if (!ok) {
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231 | for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) {
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232 | xi = sk_X509_INFO_value(ret, i);
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233 | X509_INFO_free(xi);
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234 | }
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235 | if (ret != sk)
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236 | sk_X509_INFO_free(ret);
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237 | ret = NULL;
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238 | }
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239 |
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240 | OPENSSL_free(name);
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241 | OPENSSL_free(header);
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242 | OPENSSL_free(data);
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243 | return ret;
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244 | }
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245 |
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246 | /* A TJH addition */
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247 | int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
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248 | unsigned char *kstr, int klen,
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249 | pem_password_cb *cb, void *u)
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250 | {
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251 | int i, ret = 0;
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252 | unsigned char *data = NULL;
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253 | const char *objstr = NULL;
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254 | char buf[PEM_BUFSIZE];
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255 | unsigned char *iv = NULL;
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256 |
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257 | if (enc != NULL) {
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258 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
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259 | if (objstr == NULL
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260 | /*
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261 | * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
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262 | * fits into buf
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263 | */
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264 | || (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13)
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265 | > sizeof(buf)) {
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266 | PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
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267 | goto err;
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268 | }
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269 | }
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270 |
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271 | /*
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272 | * now for the fun part ... if we have a private key then we have to be
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273 | * able to handle a not-yet-decrypted key being written out correctly ...
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274 | * if it is decrypted or it is non-encrypted then we use the base code
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275 | */
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276 | if (xi->x_pkey != NULL) {
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277 | if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
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278 | if (enc == NULL) {
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279 | PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_CIPHER_IS_NULL);
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280 | goto err;
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281 | }
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282 |
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283 | /* copy from weirdo names into more normal things */
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284 | iv = xi->enc_cipher.iv;
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285 | data = (unsigned char *)xi->enc_data;
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286 | i = xi->enc_len;
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287 |
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288 | /*
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289 | * we take the encryption data from the internal stuff rather
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290 | * than what the user has passed us ... as we have to match
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291 | * exactly for some strange reason
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292 | */
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293 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
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294 | if (objstr == NULL) {
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295 | PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,
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296 | PEM_R_UNSUPPORTED_CIPHER);
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297 | goto err;
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298 | }
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299 |
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300 | /* Create the right magic header stuff */
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301 | buf[0] = '\0';
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302 | PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
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303 | PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc),
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304 | (char *)iv);
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305 |
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306 | /* use the normal code to write things out */
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307 | i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
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308 | if (i <= 0)
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309 | goto err;
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310 | } else {
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311 | /* Add DSA/DH */
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312 | #ifndef OPENSSL_NO_RSA
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313 | /* normal optionally encrypted stuff */
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314 | if (PEM_write_bio_RSAPrivateKey(bp,
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315 | EVP_PKEY_get0_RSA(xi->x_pkey->dec_pkey),
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316 | enc, kstr, klen, cb, u) <= 0)
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317 | goto err;
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318 | #endif
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319 | }
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320 | }
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321 |
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322 | /* if we have a certificate then write it out now */
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323 | if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
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324 | goto err;
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325 |
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326 | /*
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327 | * we are ignoring anything else that is loaded into the X509_INFO
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328 | * structure for the moment ... as I don't need it so I'm not coding it
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329 | * here and Eric can do it when this makes it into the base library --tjh
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330 | */
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331 |
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332 | ret = 1;
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333 |
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334 | err:
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335 | OPENSSL_cleanse(buf, PEM_BUFSIZE);
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336 | return ret;
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337 | }
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