apps/spkac.c

   1 /*
   2  * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 <stdlib.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #include "apps.h"
  15 #include <openssl/bio.h>
  16 #include <openssl/conf.h>
  17 #include <openssl/err.h>
  18 #include <openssl/evp.h>
  19 #include <openssl/lhash.h>
  20 #include <openssl/x509.h>
  21 #include <openssl/pem.h>
  22
  23 typedef enum OPTION_choice {
  24     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  25     OPT_NOOUT, OPT_PUBKEY, OPT_VERIFY, OPT_IN, OPT_OUT,
  26     OPT_ENGINE, OPT_KEY, OPT_CHALLENGE, OPT_PASSIN, OPT_SPKAC,
  27     OPT_SPKSECT
  28 } OPTION_CHOICE;
  29
  30 const OPTIONS spkac_options[] = {
  31     {"help", OPT_HELP, '-', "Display this summary"},
  32     {"in", OPT_IN, '<', "Input file"},
  33     {"out", OPT_OUT, '>', "Output file"},
  34     {"key", OPT_KEY, '<', "Create SPKAC using private key"},
  35     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  36     {"challenge", OPT_CHALLENGE, 's', "Challenge string"},
  37     {"spkac", OPT_SPKAC, 's', "Alternative SPKAC name"},
  38     {"noout", OPT_NOOUT, '-', "Don't print SPKAC"},
  39     {"pubkey", OPT_PUBKEY, '-', "Output public key"},
  40     {"verify", OPT_VERIFY, '-', "Verify SPKAC signature"},
  41     {"spksect", OPT_SPKSECT, 's',
  42      "Specify the name of an SPKAC-dedicated section of configuration"},
  43 #ifndef OPENSSL_NO_ENGINE
  44     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  45 #endif
  46     {NULL}
  47 };
  48
  49 int spkac_main(int argc, char **argv)
  50 {
  51     BIO *out = NULL;
  52     CONF *conf = NULL;
  53     ENGINE *e = NULL;
  54     EVP_PKEY *pkey = NULL;
  55     NETSCAPE_SPKI *spki = NULL;
  56     char *challenge = NULL, *keyfile = NULL;
  57     char *infile = NULL, *outfile = NULL, *passinarg = NULL, *passin = NULL;
  58     char *spkstr = NULL, *prog;
  59     const char *spkac = "SPKAC", *spksect = "default";
  60     int i, ret = 1, verify = 0, noout = 0, pubkey = 0;
  61     OPTION_CHOICE o;
  62
  63     prog = opt_init(argc, argv, spkac_options);
  64     while ((o = opt_next()) != OPT_EOF) {
  65         switch (o) {
  66         case OPT_EOF:
  67         case OPT_ERR:
  68  opthelp:
  69             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  70             goto end;
  71         case OPT_HELP:
  72             opt_help(spkac_options);
  73             ret = 0;
  74             goto end;
  75         case OPT_IN:
  76             infile = opt_arg();
  77             break;
  78         case OPT_OUT:
  79             outfile = opt_arg();
  80             break;
  81         case OPT_NOOUT:
  82             noout = 1;
  83             break;
  84         case OPT_PUBKEY:
  85             pubkey = 1;
  86             break;
  87         case OPT_VERIFY:
  88             verify = 1;
  89             break;
  90         case OPT_PASSIN:
  91             passinarg = opt_arg();
  92             break;
  93         case OPT_KEY:
  94             keyfile = opt_arg();
  95             break;
  96         case OPT_CHALLENGE:
  97             challenge = opt_arg();
  98             break;
  99         case OPT_SPKAC:
 100             spkac = opt_arg();
 101             break;
 102         case OPT_SPKSECT:
 103             spksect = opt_arg();
 104             break;
 105         case OPT_ENGINE:
 106             e = setup_engine(opt_arg(), 0);
 107             break;
 108         }
 109     }
 110     argc = opt_num_rest();
 111     if (argc != 0)
 112         goto opthelp;
 113
 114     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 115         BIO_printf(bio_err, "Error getting password\n");
 116         goto end;
 117     }
 118
 119     if (keyfile) {
 120         pkey = load_key(strcmp(keyfile, "-") ? keyfile : NULL,
 121                         FORMAT_PEM, 1, passin, e, "private key");
 122         if (!pkey) {
 123             goto end;
 124         }
 125         spki = NETSCAPE_SPKI_new();
 126         if (challenge)
 127             ASN1_STRING_set(spki->spkac->challenge,
 128                             challenge, (int)strlen(challenge));
 129         NETSCAPE_SPKI_set_pubkey(spki, pkey);
 130         NETSCAPE_SPKI_sign(spki, pkey, EVP_md5());
 131         spkstr = NETSCAPE_SPKI_b64_encode(spki);
 132
 133         out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 134         if (out == NULL) {
 135             OPENSSL_free(spkstr);
 136             goto end;
 137         }
 138         BIO_printf(out, "SPKAC=%s\n", spkstr);
 139         OPENSSL_free(spkstr);
 140         ret = 0;
 141         goto end;
 142     }
 143
 144     if ((conf = app_load_config(infile)) == NULL)
 145         goto end;
 146
 147     spkstr = NCONF_get_string(conf, spksect, spkac);
 148
 149     if (spkstr == NULL) {
 150         BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n", spkac);
 151         ERR_print_errors(bio_err);
 152         goto end;
 153     }
 154
 155     spki = NETSCAPE_SPKI_b64_decode(spkstr, -1);
 156
 157     if (!spki) {
 158         BIO_printf(bio_err, "Error loading SPKAC\n");
 159         ERR_print_errors(bio_err);
 160         goto end;
 161     }
 162
 163     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 164     if (out == NULL)
 165         goto end;
 166
 167     if (!noout)
 168         NETSCAPE_SPKI_print(out, spki);
 169     pkey = NETSCAPE_SPKI_get_pubkey(spki);
 170     if (verify) {
 171         i = NETSCAPE_SPKI_verify(spki, pkey);
 172         if (i > 0)
 173             BIO_printf(bio_err, "Signature OK\n");
 174         else {
 175             BIO_printf(bio_err, "Signature Failure\n");
 176             ERR_print_errors(bio_err);
 177             goto end;
 178         }
 179     }
 180     if (pubkey)
 181         PEM_write_bio_PUBKEY(out, pkey);
 182
 183     ret = 0;
 184
 185  end:
 186     NCONF_free(conf);
 187     NETSCAPE_SPKI_free(spki);
 188     BIO_free_all(out);
 189     EVP_PKEY_free(pkey);
 190     OPENSSL_free(passin);
 191     return (ret);
 192 }