apps/spkac.c

   1 /*
   2  * Copyright 1999-2020 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     OPT_PROV_ENUM
  29 } OPTION_CHOICE;
  30
  31 const OPTIONS spkac_options[] = {
  32     OPT_SECTION("General"),
  33     {"help", OPT_HELP, '-', "Display this summary"},
  34     {"spksect", OPT_SPKSECT, 's',
  35      "Specify the name of an SPKAC-dedicated section of configuration"},
  36 #ifndef OPENSSL_NO_ENGINE
  37     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  38 #endif
  39
  40     OPT_SECTION("Input"),
  41     {"in", OPT_IN, '<', "Input file"},
  42     {"key", OPT_KEY, '<', "Create SPKAC using private key"},
  43     {"keyform", OPT_KEYFORM, 'f', "Private key file format - default PEM (PEM, DER, or ENGINE)"},
  44     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  45     {"challenge", OPT_CHALLENGE, 's', "Challenge string"},
  46     {"spkac", OPT_SPKAC, 's', "Alternative SPKAC name"},
  47
  48     OPT_SECTION("Output"),
  49     {"out", OPT_OUT, '>', "Output file"},
  50     {"noout", OPT_NOOUT, '-', "Don't print SPKAC"},
  51     {"pubkey", OPT_PUBKEY, '-', "Output public key"},
  52     {"verify", OPT_VERIFY, '-', "Verify SPKAC signature"},
  53
  54     OPT_PROV_OPTIONS,
  55     {NULL}
  56 };
  57
  58 int spkac_main(int argc, char **argv)
  59 {
  60     BIO *out = NULL;
  61     CONF *conf = NULL;
  62     ENGINE *e = NULL;
  63     EVP_PKEY *pkey = NULL;
  64     NETSCAPE_SPKI *spki = NULL;
  65     char *challenge = NULL, *keyfile = NULL;
  66     char *infile = NULL, *outfile = NULL, *passinarg = NULL, *passin = NULL;
  67     char *spkstr = NULL, *prog;
  68     const char *spkac = "SPKAC", *spksect = "default";
  69     int i, ret = 1, verify = 0, noout = 0, pubkey = 0;
  70     int keyformat = FORMAT_PEM;
  71     OPTION_CHOICE o;
  72
  73     prog = opt_init(argc, argv, spkac_options);
  74     while ((o = opt_next()) != OPT_EOF) {
  75         switch (o) {
  76         case OPT_EOF:
  77         case OPT_ERR:
  78  opthelp:
  79             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  80             goto end;
  81         case OPT_HELP:
  82             opt_help(spkac_options);
  83             ret = 0;
  84             goto end;
  85         case OPT_IN:
  86             infile = opt_arg();
  87             break;
  88         case OPT_OUT:
  89             outfile = opt_arg();
  90             break;
  91         case OPT_NOOUT:
  92             noout = 1;
  93             break;
  94         case OPT_PUBKEY:
  95             pubkey = 1;
  96             break;
  97         case OPT_VERIFY:
  98             verify = 1;
  99             break;
 100         case OPT_PASSIN:
 101             passinarg = opt_arg();
 102             break;
 103         case OPT_KEY:
 104             keyfile = opt_arg();
 105             break;
 106         case OPT_KEYFORM:
 107             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
 108                 goto opthelp;
 109             break;
 110         case OPT_CHALLENGE:
 111             challenge = opt_arg();
 112             break;
 113         case OPT_SPKAC:
 114             spkac = opt_arg();
 115             break;
 116         case OPT_SPKSECT:
 117             spksect = opt_arg();
 118             break;
 119         case OPT_ENGINE:
 120             e = setup_engine(opt_arg(), 0);
 121             break;
 122         case OPT_PROV_CASES:
 123             if (!opt_provider(o))
 124                 goto end;
 125             break;
 126         }
 127     }
 128     argc = opt_num_rest();
 129     if (argc != 0)
 130         goto opthelp;
 131
 132     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 133         BIO_printf(bio_err, "Error getting password\n");
 134         goto end;
 135     }
 136
 137     if (keyfile != NULL) {
 138         pkey = load_key(strcmp(keyfile, "-") ? keyfile : NULL,
 139                         keyformat, 1, passin, e, "private key");
 140         if (pkey == NULL)
 141             goto end;
 142         spki = NETSCAPE_SPKI_new();
 143         if (spki == NULL)
 144             goto end;
 145         if (challenge != NULL)
 146             ASN1_STRING_set(spki->spkac->challenge,
 147                             challenge, (int)strlen(challenge));
 148         if (!NETSCAPE_SPKI_set_pubkey(spki, pkey)) {
 149             BIO_printf(bio_err, "Error setting public key\n");
 150             goto end;
 151         }
 152         i = NETSCAPE_SPKI_sign(spki, pkey, EVP_md5());
 153         if (i <= 0) {
 154             BIO_printf(bio_err, "Error signing SPKAC\n");
 155             goto end;
 156         }
 157         spkstr = NETSCAPE_SPKI_b64_encode(spki);
 158         if (spkstr == NULL)
 159             goto end;
 160
 161         out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 162         if (out == NULL) {
 163             OPENSSL_free(spkstr);
 164             goto end;
 165         }
 166         BIO_printf(out, "SPKAC=%s\n", spkstr);
 167         OPENSSL_free(spkstr);
 168         ret = 0;
 169         goto end;
 170     }
 171
 172     if ((conf = app_load_config(infile)) == NULL)
 173         goto end;
 174
 175     spkstr = NCONF_get_string(conf, spksect, spkac);
 176
 177     if (spkstr == NULL) {
 178         BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n", spkac);
 179         ERR_print_errors(bio_err);
 180         goto end;
 181     }
 182
 183     spki = NETSCAPE_SPKI_b64_decode(spkstr, -1);
 184
 185     if (spki == NULL) {
 186         BIO_printf(bio_err, "Error loading SPKAC\n");
 187         ERR_print_errors(bio_err);
 188         goto end;
 189     }
 190
 191     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 192     if (out == NULL)
 193         goto end;
 194
 195     if (!noout)
 196         NETSCAPE_SPKI_print(out, spki);
 197     pkey = NETSCAPE_SPKI_get_pubkey(spki);
 198     if (verify) {
 199         i = NETSCAPE_SPKI_verify(spki, pkey);
 200         if (i > 0) {
 201             BIO_printf(bio_err, "Signature OK\n");
 202         } else {
 203             BIO_printf(bio_err, "Signature Failure\n");
 204             ERR_print_errors(bio_err);
 205             goto end;
 206         }
 207     }
 208     if (pubkey)
 209         PEM_write_bio_PUBKEY(out, pkey);
 210
 211     ret = 0;
 212
 213  end:
 214     NCONF_free(conf);
 215     NETSCAPE_SPKI_free(spki);
 216     BIO_free_all(out);
 217     EVP_PKEY_free(pkey);
 218     release_engine(e);
 219     OPENSSL_free(passin);
 220     return ret;
 221 }