client/keypairs.c

   1 /*
   2  * Copyright (C) Ilari Liusvaara 2009-2010
   3  *
   4  * This code is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #include "keypairs.h"
   9 #include "home.h"
  10 #include "certificate.h"
  11 #include <stdio.h>
  12 #include <limits.h>
  13 #include <gnutls/openpgp.h>
  14 #include <errno.h>
  15 #include "git-compat-util.h"
  16
  17 int select_keypair_int(gnutls_certificate_credentials_t creds,
  18         const char *username)
  19 {
  20         char keypath[PATH_MAX + 1];
  21         char *keypath2;
  22         struct certificate cert;
  23         int r;
  24
  25         r = snprintf(keypath, PATH_MAX + 1, "$XDG_CONFIG_HOME/gits/keys/%s",
  26                 username);
  27         if (r < 0 || r > PATH_MAX) {
  28                 die("Username too long");
  29         }
  30
  31         keypath2 = expand_path(keypath);
  32         cert = parse_certificate(keypath2, &r);
  33         if (r) {
  34                 if (r == CERTERR_NOCERT)
  35                         return -1;
  36                 if (r == CERTERR_CANTREAD)
  37                         die_errno("Can't read keypair");
  38                 else
  39                         die("Can't read keypair: %s",
  40                                 cert_parse_strerr(r));
  41         }
  42
  43         r = gnutls_certificate_set_openpgp_keyring_mem(creds,
  44                 cert.public_key.data, cert.public_key.size,
  45                 GNUTLS_OPENPGP_FMT_RAW);
  46         if (r < 0)
  47                 die("Can't load public key: %s", gnutls_strerror(r));
  48
  49         r = gnutls_certificate_set_openpgp_key_mem(creds, &cert.public_key,
  50                 &cert.private_key, GNUTLS_OPENPGP_FMT_RAW);
  51         if (r < 0)
  52                 die("Can't load keypair: %s", gnutls_strerror(r));
  53
  54         free(keypath2);
  55         return 0;
  56 }