apps/spkac.c

   1 /*
   2  * Copyright 1999-2018 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 <stdlib.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #include "apps.h"
  15 #include "progs.h"
  16 #include <openssl/bio.h>
  17 #include <openssl/conf.h>
  18 #include <openssl/err.h>
  19 #include <openssl/evp.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, OPT_KEYFORM
  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     {"keyform", OPT_KEYFORM, 'f', "Private key file format - default PEM (PEM, DER, or ENGINE)"},
  36     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  37     {"challenge", OPT_CHALLENGE, 's', "Challenge string"},
  38     {"spkac", OPT_SPKAC, 's', "Alternative SPKAC name"},
  39     {"noout", OPT_NOOUT, '-', "Don't print SPKAC"},
  40     {"pubkey", OPT_PUBKEY, '-', "Output public key"},
  41     {"verify", OPT_VERIFY, '-', "Verify SPKAC signature"},
  42     {"spksect", OPT_SPKSECT, 's',
  43      "Specify the name of an SPKAC-dedicated section of configuration"},
  44 #ifndef OPENSSL_NO_ENGINE
  45     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  46 #endif
  47     {NULL}
  48 };
  49
  50 int spkac_main(int argc, char **argv)
  51 {
  52     BIO *out = NULL;
  53     CONF *conf = NULL;
  54     ENGINE *e = NULL;
  55     EVP_PKEY *pkey = NULL;
  56     NETSCAPE_SPKI *spki = NULL;
  57     char *challenge = NULL, *keyfile = NULL;
  58     char *infile = NULL, *outfile = NULL, *passinarg = NULL, *passin = NULL;
  59     char *spkstr = NULL, *prog;
  60     const char *spkac = "SPKAC", *spksect = "default";
  61     int i, ret = 1, verify = 0, noout = 0, pubkey = 0;
  62     int keyformat = FORMAT_PEM;
  63     OPTION_CHOICE o;
  64
  65     prog = opt_init(argc, argv, spkac_options);
  66     while ((o = opt_next()) != OPT_EOF) {
  67         switch (o) {
  68         case OPT_EOF:
  69         case OPT_ERR:
  70  opthelp:
  71             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  72             goto end;
  73         case OPT_HELP:
  74             opt_help(spkac_options);
  75             ret = 0;
  76             goto end;
  77         case OPT_IN:
  78             infile = opt_arg();
  79             break;
  80         case OPT_OUT:
  81             outfile = opt_arg();
  82             break;
  83         case OPT_NOOUT:
  84             noout = 1;
  85             break;
  86         case OPT_PUBKEY:
  87             pubkey = 1;
  88             break;
  89         case OPT_VERIFY:
  90             verify = 1;
  91             break;
  92         case OPT_PASSIN:
  93             passinarg = opt_arg();
  94             break;
  95         case OPT_KEY:
  96             keyfile = opt_arg();
  97             break;
  98         case OPT_KEYFORM:
  99             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
 100                 goto opthelp;
 101             break;
 102         case OPT_CHALLENGE:
 103             challenge = opt_arg();
 104             break;
 105         case OPT_SPKAC:
 106             spkac = opt_arg();
 107             break;
 108         case OPT_SPKSECT:
 109             spksect = opt_arg();
 110             break;
 111         case OPT_ENGINE:
 112             e = setup_engine(opt_arg(), 0);
 113             break;
 114         }
 115     }
 116     argc = opt_num_rest();
 117     if (argc != 0)
 118         goto opthelp;
 119
 120     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 121         BIO_printf(bio_err, "Error getting password\n");
 122         goto end;
 123     }
 124
 125     if (keyfile != NULL) {
 126         pkey = load_key(strcmp(keyfile, "-") ? keyfile : NULL,
 127                         keyformat, 1, passin, e, "private key");
 128         if (pkey == NULL)
 129             goto end;
 130         spki = NETSCAPE_SPKI_new();
 131         if (spki == NULL)
 132             goto end;
 133         if (challenge != NULL)
 134             ASN1_STRING_set(spki->spkac->challenge,
 135                             challenge, (int)strlen(challenge));
 136         NETSCAPE_SPKI_set_pubkey(spki, pkey);
 137         NETSCAPE_SPKI_sign(spki, pkey, EVP_md5());
 138         spkstr = NETSCAPE_SPKI_b64_encode(spki);
 139         if (spkstr == NULL)
 140             goto end;
 141
 142         out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 143         if (out == NULL) {
 144             OPENSSL_free(spkstr);
 145             goto end;
 146         }
 147         BIO_printf(out, "SPKAC=%s\n", spkstr);
 148         OPENSSL_free(spkstr);
 149         ret = 0;
 150         goto end;
 151     }
 152
 153     if ((conf = app_load_config(infile)) == NULL)
 154         goto end;
 155
 156     spkstr = NCONF_get_string(conf, spksect, spkac);
 157
 158     if (spkstr == NULL) {
 159         BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n", spkac);
 160         ERR_print_errors(bio_err);
 161         goto end;
 162     }
 163
 164     spki = NETSCAPE_SPKI_b64_decode(spkstr, -1);
 165
 166     if (spki == NULL) {
 167         BIO_printf(bio_err, "Error loading SPKAC\n");
 168         ERR_print_errors(bio_err);
 169         goto end;
 170     }
 171
 172     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 173     if (out == NULL)
 174         goto end;
 175
 176     if (!noout)
 177         NETSCAPE_SPKI_print(out, spki);
 178     pkey = NETSCAPE_SPKI_get_pubkey(spki);
 179     if (verify) {
 180         i = NETSCAPE_SPKI_verify(spki, pkey);
 181         if (i > 0) {
 182             BIO_printf(bio_err, "Signature OK\n");
 183         } else {
 184             BIO_printf(bio_err, "Signature Failure\n");
 185             ERR_print_errors(bio_err);
 186             goto end;
 187         }
 188     }
 189     if (pubkey)
 190         PEM_write_bio_PUBKEY(out, pkey);
 191
 192     ret = 0;
 193
 194  end:
 195     NCONF_free(conf);
 196     NETSCAPE_SPKI_free(spki);
 197     BIO_free_all(out);
 198     EVP_PKEY_free(pkey);
 199     release_engine(e);
 200     OPENSSL_free(passin);
 201     return ret;
 202 }