src/pki/commands/req.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  * Copyright (C) 2009 Andreas Steffen
   4  *
   5  * HSR Hochschule fuer Technik Rapperswil
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2 of the License, or (at your
  10  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * for more details.
  16  */
  17
  18 #include <time.h>
  19 #include <errno.h>
  20
  21 #include "pki.h"
  22
  23 #include <collections/linked_list.h>
  24 #include <credentials/certificates/certificate.h>
  25
  26 /**
  27  * Create a self-signed PKCS#10 certificate requesst.
  28  */
  29 static int req()
  30 {
  31         cred_encoding_type_t form = CERT_ASN1_DER;
  32         key_type_t type = KEY_RSA;
  33         hash_algorithm_t digest = HASH_SHA1;
  34         certificate_t *cert = NULL;
  35         private_key_t *private = NULL;
  36         char *file = NULL, *dn = NULL, *error = NULL;
  37         identification_t *id = NULL;
  38         linked_list_t *san;
  39         chunk_t encoding = chunk_empty;
  40         chunk_t challenge_password = chunk_empty;
  41         char *arg;
  42
  43         san = linked_list_create();
  44
  45         while (TRUE)
  46         {
  47                 switch (command_getopt(&arg))
  48                 {
  49                         case 'h':
  50                                 goto usage;
  51                         case 't':
  52                                 if (streq(arg, "rsa"))
  53                                 {
  54                                         type = KEY_RSA;
  55                                 }
  56                                 else if (streq(arg, "ecdsa"))
  57                                 {
  58                                         type = KEY_ECDSA;
  59                                 }
  60                                 else
  61                                 {
  62                                         error = "invalid input type";
  63                                         goto usage;
  64                                 }
  65                                 continue;
  66                         case 'g':
  67                                 if (!enum_from_name(hash_algorithm_short_names, arg, &digest))
  68                                 {
  69                                         error = "invalid --digest type";
  70                                         goto usage;
  71                                 }
  72                                 continue;
  73                         case 'i':
  74                                 file = arg;
  75                                 continue;
  76                         case 'd':
  77                                 dn = arg;
  78                                 continue;
  79                         case 'a':
  80                                 san->insert_last(san, identification_create_from_string(arg));
  81                                 continue;
  82                         case 'p':
  83                                 challenge_password = chunk_create(arg, strlen(arg));
  84                                 continue;
  85                         case 'f':
  86                                 if (!get_form(arg, &form, CRED_CERTIFICATE))
  87                                 {
  88                                         error = "invalid output format";
  89                                         goto usage;
  90                                 }
  91                                 continue;
  92                         case EOF:
  93                                 break;
  94                         default:
  95                                 error = "invalid --req option";
  96                                 goto usage;
  97                 }
  98                 break;
  99         }
 100
 101         if (!dn)
 102         {
 103                 error = "--dn is required";
 104                 goto usage;
 105         }
 106         id = identification_create_from_string(dn);
 107         if (id->get_type(id) != ID_DER_ASN1_DN)
 108         {
 109                 error = "supplied --dn is not a distinguished name";
 110                 goto end;
 111         }
 112         if (file)
 113         {
 114                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 115                                                                          BUILD_FROM_FILE, file, BUILD_END);
 116         }
 117         else
 118         {
 119                 chunk_t chunk;
 120
 121                 set_file_mode(stdin, CERT_ASN1_DER);
 122                 if (!chunk_from_fd(0, &chunk))
 123                 {
 124                         fprintf(stderr, "reading private key failed: %s\n", strerror(errno));
 125                         error = "";
 126                         goto end;
 127                 }
 128                 private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, type,
 129                                                                          BUILD_BLOB, chunk, BUILD_END);
 130                 free(chunk.ptr);
 131         }
 132         if (!private)
 133         {
 134                 error = "parsing private key failed";
 135                 goto end;
 136         }
 137         cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_PKCS10_REQUEST,
 138                                                           BUILD_SIGNING_KEY, private,
 139                                                           BUILD_SUBJECT, id,
 140                                                           BUILD_SUBJECT_ALTNAMES, san,
 141                                                           BUILD_CHALLENGE_PWD, challenge_password,
 142                                                           BUILD_DIGEST_ALG, digest,
 143                                                           BUILD_END);
 144         if (!cert)
 145         {
 146                 error = "generating certificate request failed";
 147                 goto end;
 148         }
 149         if (!cert->get_encoding(cert, form, &encoding))
 150         {
 151                 error = "encoding certificate request failed";
 152                 goto end;
 153         }
 154         set_file_mode(stdout, form);
 155         if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
 156         {
 157                 error = "writing certificate request failed";
 158                 goto end;
 159         }
 160
 161 end:
 162         DESTROY_IF(id);
 163         DESTROY_IF(cert);
 164         DESTROY_IF(private);
 165         san->destroy_offset(san, offsetof(identification_t, destroy));
 166         free(encoding.ptr);
 167
 168         if (error)
 169         {
 170                 fprintf(stderr, "%s\n", error);
 171                 return 1;
 172         }
 173         return 0;
 174
 175 usage:
 176         san->destroy_offset(san, offsetof(identification_t, destroy));
 177         return command_usage(error);
 178 }
 179
 180 /**
 181  * Register the command.
 182  */
 183 static void __attribute__ ((constructor))reg()
 184 {
 185         command_register((command_t) {
 186                 req, 'r', "req",
 187                 "create a PKCS#10 certificate request",
 188                 {"  [--in file] [--type rsa|ecdsa] --dn distinguished-name",
 189                  "[--san subjectAltName]+ [--password challengePassword]",
 190                  "[--digest md5|sha1|sha224|sha256|sha384|sha512] [--outform der|pem]"},
 191                 {
 192                         {"help",        'h', 0, "show usage information"},
 193                         {"in",          'i', 1, "private key input file, default: stdin"},
 194                         {"type",        't', 1, "type of input key, default: rsa"},
 195                         {"dn",          'd', 1, "subject distinguished name"},
 196                         {"san",         'a', 1, "subjectAltName to include in cert request"},
 197                         {"password",'p', 1, "challengePassword to include in cert request"},
 198                         {"digest",      'g', 1, "digest for signature creation, default: sha1"},
 199                         {"outform",     'f', 1, "encoding of generated request, default: der"},
 200                 }
 201         });
 202 }