[331] | 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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