apps/crl2p7.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <sys/types.h>
  13 #include "apps.h"
  14 #include "progs.h"
  15 #include <openssl/err.h>
  16 #include <openssl/evp.h>
  17 #include <openssl/x509.h>
  18 #include <openssl/pkcs7.h>
  19 #include <openssl/pem.h>
  20 #include <openssl/objects.h>
  21
  22 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile);
  23
  24 typedef enum OPTION_choice {
  25     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  26     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_NOCRL, OPT_CERTFILE
  27 } OPTION_CHOICE;
  28
  29 const OPTIONS crl2pkcs7_options[] = {
  30     OPT_SECTION("General"),
  31     {"help", OPT_HELP, '-', "Display this summary"},
  32
  33     OPT_SECTION("Input"),
  34     {"in", OPT_IN, '<', "Input file"},
  35     {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
  36     {"nocrl", OPT_NOCRL, '-', "No crl to load, just certs from '-certfile'"},
  37     {"certfile", OPT_CERTFILE, '<',
  38      "File of chain of certs to a trusted CA; can be repeated"},
  39
  40     OPT_SECTION("Output"),
  41     {"out", OPT_OUT, '>', "Output file"},
  42     {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
  43     {NULL}
  44 };
  45
  46 int crl2pkcs7_main(int argc, char **argv)
  47 {
  48     BIO *in = NULL, *out = NULL;
  49     PKCS7 *p7 = NULL;
  50     PKCS7_SIGNED *p7s = NULL;
  51     STACK_OF(OPENSSL_STRING) *certflst = NULL;
  52     STACK_OF(X509) *cert_stack = NULL;
  53     STACK_OF(X509_CRL) *crl_stack = NULL;
  54     X509_CRL *crl = NULL;
  55     char *infile = NULL, *outfile = NULL, *prog, *certfile;
  56     int i = 0, informat = FORMAT_PEM, outformat = FORMAT_PEM, ret = 1, nocrl =
  57         0;
  58     OPTION_CHOICE o;
  59
  60     prog = opt_init(argc, argv, crl2pkcs7_options);
  61     while ((o = opt_next()) != OPT_EOF) {
  62         switch (o) {
  63         case OPT_EOF:
  64         case OPT_ERR:
  65  opthelp:
  66             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  67             goto end;
  68         case OPT_HELP:
  69             opt_help(crl2pkcs7_options);
  70             ret = 0;
  71             goto end;
  72         case OPT_INFORM:
  73             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
  74                 goto opthelp;
  75             break;
  76         case OPT_OUTFORM:
  77             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
  78                 goto opthelp;
  79             break;
  80         case OPT_IN:
  81             infile = opt_arg();
  82             break;
  83         case OPT_OUT:
  84             outfile = opt_arg();
  85             break;
  86         case OPT_NOCRL:
  87             nocrl = 1;
  88             break;
  89         case OPT_CERTFILE:
  90             if ((certflst == NULL)
  91                 && (certflst = sk_OPENSSL_STRING_new_null()) == NULL)
  92                 goto end;
  93             if (!sk_OPENSSL_STRING_push(certflst, opt_arg()))
  94                 goto end;
  95             break;
  96         }
  97     }
  98     argc = opt_num_rest();
  99     if (argc != 0)
 100         goto opthelp;
 101
 102     if (!nocrl) {
 103         in = bio_open_default(infile, 'r', informat);
 104         if (in == NULL)
 105             goto end;
 106
 107         if (informat == FORMAT_ASN1)
 108             crl = d2i_X509_CRL_bio(in, NULL);
 109         else if (informat == FORMAT_PEM)
 110             crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
 111         if (crl == NULL) {
 112             BIO_printf(bio_err, "unable to load CRL\n");
 113             ERR_print_errors(bio_err);
 114             goto end;
 115         }
 116     }
 117
 118     if ((p7 = PKCS7_new()) == NULL)
 119         goto end;
 120     if ((p7s = PKCS7_SIGNED_new()) == NULL)
 121         goto end;
 122     p7->type = OBJ_nid2obj(NID_pkcs7_signed);
 123     p7->d.sign = p7s;
 124     p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
 125
 126     if (!ASN1_INTEGER_set(p7s->version, 1))
 127         goto end;
 128     if ((crl_stack = sk_X509_CRL_new_null()) == NULL)
 129         goto end;
 130     p7s->crl = crl_stack;
 131     if (crl != NULL) {
 132         sk_X509_CRL_push(crl_stack, crl);
 133         crl = NULL;             /* now part of p7 for OPENSSL_freeing */
 134     }
 135
 136     if ((cert_stack = sk_X509_new_null()) == NULL)
 137         goto end;
 138     p7s->cert = cert_stack;
 139
 140     if (certflst != NULL)
 141         for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) {
 142             certfile = sk_OPENSSL_STRING_value(certflst, i);
 143             if (add_certs_from_file(cert_stack, certfile) < 0) {
 144                 BIO_printf(bio_err, "error loading certificates\n");
 145                 ERR_print_errors(bio_err);
 146                 goto end;
 147             }
 148         }
 149
 150     out = bio_open_default(outfile, 'w', outformat);
 151     if (out == NULL)
 152         goto end;
 153
 154     if (outformat == FORMAT_ASN1)
 155         i = i2d_PKCS7_bio(out, p7);
 156     else if (outformat == FORMAT_PEM)
 157         i = PEM_write_bio_PKCS7(out, p7);
 158     if (!i) {
 159         BIO_printf(bio_err, "unable to write pkcs7 object\n");
 160         ERR_print_errors(bio_err);
 161         goto end;
 162     }
 163     ret = 0;
 164  end:
 165     sk_OPENSSL_STRING_free(certflst);
 166     BIO_free(in);
 167     BIO_free_all(out);
 168     PKCS7_free(p7);
 169     X509_CRL_free(crl);
 170
 171     return ret;
 172 }
 173
 174 /*-
 175  *----------------------------------------------------------------------
 176  * int add_certs_from_file
 177  *
 178  *      Read a list of certificates to be checked from a file.
 179  *
 180  * Results:
 181  *      number of certs added if successful, -1 if not.
 182  *----------------------------------------------------------------------
 183  */
 184 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)
 185 {
 186     BIO *in = NULL;
 187     int count = 0;
 188     int ret = -1;
 189     STACK_OF(X509_INFO) *sk = NULL;
 190     X509_INFO *xi;
 191
 192     in = BIO_new_file(certfile, "r");
 193     if (in == NULL) {
 194         BIO_printf(bio_err, "error opening the file, %s\n", certfile);
 195         goto end;
 196     }
 197
 198     /* This loads from a file, a stack of x509/crl/pkey sets */
 199     sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
 200     if (sk == NULL) {
 201         BIO_printf(bio_err, "error reading the file, %s\n", certfile);
 202         goto end;
 203     }
 204
 205     /* scan over it and pull out the CRL's */
 206     while (sk_X509_INFO_num(sk)) {
 207         xi = sk_X509_INFO_shift(sk);
 208         if (xi->x509 != NULL) {
 209             sk_X509_push(stack, xi->x509);
 210             xi->x509 = NULL;
 211             count++;
 212         }
 213         X509_INFO_free(xi);
 214     }
 215
 216     ret = count;
 217  end:
 218     /* never need to OPENSSL_free x */
 219     BIO_free(in);
 220     sk_X509_INFO_free(sk);
 221     return ret;
 222 }