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