1 | /*
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2 | * Copyright 1995-2016 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 <string.h>
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12 | #include <sys/types.h>
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13 | #include "apps.h"
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14 | #include <openssl/err.h>
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15 | #include <openssl/evp.h>
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16 | #include <openssl/x509.h>
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17 | #include <openssl/pkcs7.h>
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18 | #include <openssl/pem.h>
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19 | #include <openssl/objects.h>
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20 |
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21 | static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile);
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22 |
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23 | typedef enum OPTION_choice {
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24 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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25 | OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_NOCRL, OPT_CERTFILE
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26 | } OPTION_CHOICE;
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27 |
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28 | OPTIONS crl2pkcs7_options[] = {
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29 | {"help", OPT_HELP, '-', "Display this summary"},
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30 | {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
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31 | {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
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32 | {"in", OPT_IN, '<', "Input file"},
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33 | {"out", OPT_OUT, '>', "Output file"},
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34 | {"nocrl", OPT_NOCRL, '-', "No crl to load, just certs from '-certfile'"},
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35 | {"certfile", OPT_CERTFILE, '<',
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36 | "File of chain of certs to a trusted CA; can be repeated"},
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37 | {NULL}
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38 | };
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39 |
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40 | int crl2pkcs7_main(int argc, char **argv)
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41 | {
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42 | BIO *in = NULL, *out = NULL;
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43 | PKCS7 *p7 = NULL;
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44 | PKCS7_SIGNED *p7s = NULL;
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45 | STACK_OF(OPENSSL_STRING) *certflst = NULL;
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46 | STACK_OF(X509) *cert_stack = NULL;
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47 | STACK_OF(X509_CRL) *crl_stack = NULL;
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48 | X509_CRL *crl = NULL;
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49 | char *infile = NULL, *outfile = NULL, *prog, *certfile;
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50 | int i = 0, informat = FORMAT_PEM, outformat = FORMAT_PEM, ret = 1, nocrl =
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51 | 0;
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52 | OPTION_CHOICE o;
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53 |
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54 | prog = opt_init(argc, argv, crl2pkcs7_options);
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55 | while ((o = opt_next()) != OPT_EOF) {
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56 | switch (o) {
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57 | case OPT_EOF:
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58 | case OPT_ERR:
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59 | opthelp:
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60 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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61 | goto end;
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62 | case OPT_HELP:
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63 | opt_help(crl2pkcs7_options);
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64 | ret = 0;
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65 | goto end;
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66 | case OPT_INFORM:
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67 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
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68 | goto opthelp;
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69 | break;
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70 | case OPT_OUTFORM:
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71 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
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72 | goto opthelp;
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73 | break;
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74 | case OPT_IN:
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75 | infile = opt_arg();
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76 | break;
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77 | case OPT_OUT:
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78 | outfile = opt_arg();
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79 | break;
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80 | case OPT_NOCRL:
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81 | nocrl = 1;
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82 | break;
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83 | case OPT_CERTFILE:
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84 | if ((certflst == NULL)
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85 | && (certflst = sk_OPENSSL_STRING_new_null()) == NULL)
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86 | goto end;
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87 | if (!sk_OPENSSL_STRING_push(certflst, opt_arg()))
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88 | goto end;
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89 | break;
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90 | }
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91 | }
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92 | argc = opt_num_rest();
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93 | if (argc != 0)
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94 | goto opthelp;
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95 |
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96 | if (!nocrl) {
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97 | in = bio_open_default(infile, 'r', informat);
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98 | if (in == NULL)
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99 | goto end;
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100 |
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101 | if (informat == FORMAT_ASN1)
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102 | crl = d2i_X509_CRL_bio(in, NULL);
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103 | else if (informat == FORMAT_PEM)
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104 | crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
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105 | if (crl == NULL) {
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106 | BIO_printf(bio_err, "unable to load CRL\n");
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107 | ERR_print_errors(bio_err);
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108 | goto end;
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109 | }
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110 | }
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111 |
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112 | if ((p7 = PKCS7_new()) == NULL)
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113 | goto end;
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114 | if ((p7s = PKCS7_SIGNED_new()) == NULL)
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115 | goto end;
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116 | p7->type = OBJ_nid2obj(NID_pkcs7_signed);
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117 | p7->d.sign = p7s;
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118 | p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
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119 |
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120 | if (!ASN1_INTEGER_set(p7s->version, 1))
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121 | goto end;
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122 | if ((crl_stack = sk_X509_CRL_new_null()) == NULL)
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123 | goto end;
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124 | p7s->crl = crl_stack;
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125 | if (crl != NULL) {
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126 | sk_X509_CRL_push(crl_stack, crl);
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127 | crl = NULL; /* now part of p7 for OPENSSL_freeing */
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128 | }
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129 |
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130 | if ((cert_stack = sk_X509_new_null()) == NULL)
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131 | goto end;
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132 | p7s->cert = cert_stack;
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133 |
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134 | if (certflst)
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135 | for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) {
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136 | certfile = sk_OPENSSL_STRING_value(certflst, i);
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137 | if (add_certs_from_file(cert_stack, certfile) < 0) {
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138 | BIO_printf(bio_err, "error loading certificates\n");
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139 | ERR_print_errors(bio_err);
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140 | goto end;
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141 | }
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142 | }
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143 |
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144 | out = bio_open_default(outfile, 'w', outformat);
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145 | if (out == NULL)
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146 | goto end;
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147 |
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148 | if (outformat == FORMAT_ASN1)
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149 | i = i2d_PKCS7_bio(out, p7);
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150 | else if (outformat == FORMAT_PEM)
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151 | i = PEM_write_bio_PKCS7(out, p7);
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152 | if (!i) {
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153 | BIO_printf(bio_err, "unable to write pkcs7 object\n");
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154 | ERR_print_errors(bio_err);
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155 | goto end;
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156 | }
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157 | ret = 0;
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158 | end:
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159 | sk_OPENSSL_STRING_free(certflst);
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160 | BIO_free(in);
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161 | BIO_free_all(out);
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162 | PKCS7_free(p7);
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163 | X509_CRL_free(crl);
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164 |
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165 | return (ret);
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166 | }
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167 |
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168 | /*-
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169 | *----------------------------------------------------------------------
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170 | * int add_certs_from_file
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171 | *
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172 | * Read a list of certificates to be checked from a file.
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173 | *
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174 | * Results:
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175 | * number of certs added if successful, -1 if not.
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176 | *----------------------------------------------------------------------
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177 | */
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178 | static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)
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179 | {
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180 | BIO *in = NULL;
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181 | int count = 0;
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182 | int ret = -1;
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183 | STACK_OF(X509_INFO) *sk = NULL;
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184 | X509_INFO *xi;
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185 |
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186 | in = BIO_new_file(certfile, "r");
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187 | if (in == NULL) {
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188 | BIO_printf(bio_err, "error opening the file, %s\n", certfile);
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189 | goto end;
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190 | }
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191 |
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192 | /* This loads from a file, a stack of x509/crl/pkey sets */
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193 | sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
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194 | if (sk == NULL) {
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195 | BIO_printf(bio_err, "error reading the file, %s\n", certfile);
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196 | goto end;
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197 | }
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198 |
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199 | /* scan over it and pull out the CRL's */
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200 | while (sk_X509_INFO_num(sk)) {
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201 | xi = sk_X509_INFO_shift(sk);
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202 | if (xi->x509 != NULL) {
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203 | sk_X509_push(stack, xi->x509);
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204 | xi->x509 = NULL;
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205 | count++;
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206 | }
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207 | X509_INFO_free(xi);
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208 | }
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209 |
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210 | ret = count;
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211 | end:
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212 | /* never need to OPENSSL_free x */
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213 | BIO_free(in);
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214 | sk_X509_INFO_free(sk);
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215 | return (ret);
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216 | }
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