src/pki/commands/req.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  * Copyright (C) 2009-2017 Andreas Steffen
   4  * HSR Hochschule fuer Technik Rapperswil
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  */
  16
  17 #include <time.h>
  18 #include <errno.h>
  19
  20 #include "pki.h"
  21
  22 #include <collections/linked_list.h>
  23 #include <credentials/certificates/certificate.h>
  24
  25 /**
  26  * Create a self-signed PKCS#10 certificate requesst.
  27  */
  28 static int req()
  29 {
  30         cred_encoding_type_t form = CERT_ASN1_DER;
  31         key_type_t type = KEY_ANY;
  32         hash_algorithm_t digest = HASH_UNKNOWN;
  33         certificate_t *cert = NULL;
  34         private_key_t *private = NULL;
  35         char *file = NULL, *keyid = NULL, *dn = NULL, *error = NULL;
  36         identification_t *id = NULL;
  37         linked_list_t *san;
  38         chunk_t encoding = chunk_empty;
  39         chunk_t challenge_password = chunk_empty;
  40         char *arg;
  41
  42         san = linked_list_create();
  43
  44         while (TRUE)
  45         {
  46                 switch (command_getopt(&arg))
  47                 {
  48                         case 'h':
  49                                 goto usage;
  50                         case 't':
  51                                 if (streq(arg, "rsa"))
  52                                 {
  53                                         type = KEY_RSA;
  54                                 }
  55                                 else if (streq(arg, "ecdsa"))
  56                                 {
  57                                         type = KEY_ECDSA;
  58                                 }
  59                                 else if (streq(arg, "bliss"))
  60                                 {
  61                                         type = KEY_BLISS;
  62                                 }
  63                                 else if (streq(arg, "priv"))
  64                                 {
  65                                         type = KEY_ANY;
  66                                 }
  67                                 else
  68                                 {
  69                                         error = "invalid input type";
  70                                         goto usage;
  71                                 }
  72                                 continue;
  73                         case 'g':
  74                                 if (!enum_from_name(hash_algorithm_short_names, arg, &digest))
  75                                 {
  76                                         error = "invalid --digest type";
  77                                         goto usage;
  78                                 }
  79                                 continue;
  80                         case 'i':
  81                                 file = arg;
  82                                 continue;
  83                         case 'd':
  84                                 dn = arg;
  85                                 continue;
  86                         case 'a':
  87                                 san->insert_last(san, identification_create_from_string(arg));
  88                                 continue;
  89                         case 'p':
  90                                 challenge_password = chunk_create(arg, strlen(arg));
  91                                 continue;
  92                         case 'f':
  93                                 if (!get_form(arg, &form, CRED_CERTIFICATE))
  94                                 {
  95                                         error = "invalid output format";
  96                                         goto usage;
  97                                 }
  98                                 continue;
  99                         case 'x':
 100                                 keyid = arg;
 101                                 continue;
 102                         case EOF:
 103                                 break;
 104                         default:
 105                                 error = "invalid --req option";
 106                                 goto usage;
 107                 }
 108                 break;
 109         }
 110
 111         if (!dn)
 112         {
 113                 error = "--dn is required";
 114                 goto usage;
 115         }
 116         id = identification_create_from_string(dn);
 117         if (id->get_type(id) != ID_DER_ASN1_DN)
 118         {
 119                 error = "supplied --dn is not a distinguished name";
 120                 goto end;
 121         }
 122         if (file)
 123         {
 124                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 125                                                                          BUILD_FROM_FILE, file, BUILD_END);
 126         }
 127         else if (keyid)
 128         {
 129                 chunk_t chunk;
 130
 131                 chunk = chunk_from_hex(chunk_create(keyid, strlen(keyid)), NULL);
 132                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_ANY,
 133                                                                           BUILD_PKCS11_KEYID, chunk, BUILD_END);
 134                 free(chunk.ptr);
 135         }
 136         else
 137         {
 138                 chunk_t chunk;
 139
 140                 set_file_mode(stdin, CERT_ASN1_DER);
 141                 if (!chunk_from_fd(0, &chunk))
 142                 {
 143                         fprintf(stderr, "reading private key failed: %s\n", strerror(errno));
 144                         error = "";
 145                         goto end;
 146                 }
 147                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 148                                                                          BUILD_BLOB, chunk, BUILD_END);
 149                 free(chunk.ptr);
 150         }
 151         if (!private)
 152         {
 153                 error = "parsing private key failed";
 154                 goto end;
 155         }
 156         if (digest == HASH_UNKNOWN)
 157         {
 158                 digest = get_default_digest(private);
 159         }
 160         cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_PKCS10_REQUEST,
 161                                                           BUILD_SIGNING_KEY, private,
 162                                                           BUILD_SUBJECT, id,
 163                                                           BUILD_SUBJECT_ALTNAMES, san,
 164                                                           BUILD_CHALLENGE_PWD, challenge_password,
 165                                                           BUILD_DIGEST_ALG, digest,
 166                                                           BUILD_END);
 167         if (!cert)
 168         {
 169                 error = "generating certificate request failed";
 170                 goto end;
 171         }
 172         if (!cert->get_encoding(cert, form, &encoding))
 173         {
 174                 error = "encoding certificate request failed";
 175                 goto end;
 176         }
 177         set_file_mode(stdout, form);
 178         if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
 179         {
 180                 error = "writing certificate request failed";
 181                 goto end;
 182         }
 183
 184 end:
 185         DESTROY_IF(id);
 186         DESTROY_IF(cert);
 187         DESTROY_IF(private);
 188         san->destroy_offset(san, offsetof(identification_t, destroy));
 189         free(encoding.ptr);
 190
 191         if (error)
 192         {
 193                 fprintf(stderr, "%s\n", error);
 194                 return 1;
 195         }
 196         return 0;
 197
 198 usage:
 199         san->destroy_offset(san, offsetof(identification_t, destroy));
 200         return command_usage(error);
 201 }
 202
 203 /**
 204  * Register the command.
 205  */
 206 static void __attribute__ ((constructor))reg()
 207 {
 208         command_register((command_t) {
 209                 req, 'r', "req",
 210                 "create a PKCS#10 certificate request",
 211                 {"  [--in file|--keyid hex] [--type rsa|ecdsa|bliss|priv] --dn distinguished-name",
 212                  "[--san subjectAltName]+ [--password challengePassword]",
 213                  "[--digest md5|sha1|sha224|sha256|sha384|sha512|sha3_224|sha3_256|sha3_384|sha3_512]",
 214                  "[--outform der|pem]"},
 215                 {
 216                         {"help",        'h', 0, "show usage information"},
 217                         {"in",          'i', 1, "private key input file, default: stdin"},
 218                         {"keyid",       'x', 1, "smartcard or TPM private key object handle"},
 219                         {"type",        't', 1, "type of input key, default: priv"},
 220                         {"dn",          'd', 1, "subject distinguished name"},
 221                         {"san",         'a', 1, "subjectAltName to include in cert request"},
 222                         {"password",'p', 1, "challengePassword to include in cert request"},
 223                         {"digest",      'g', 1, "digest for signature creation, default: key-specific"},
 224                         {"outform",     'f', 1, "encoding of generated request, default: der"},
 225                 }
 226         });
 227 }