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Viewing changes to src/utils/ecryptfs_unwrap_passphrase.c

  • Committer: mhalcrow@us.ibm.com
  • Date: 2007-11-06 22:56:01 UTC
  • Revision ID: git-v1:f8357de9d554b274497b5cce9db4347254b7e7eb
Initial import of eCryptfs filesystem userspace utilities (mount helper, daemon component,
etc.)

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src/utils/ecryptfs_unwrap_passphrase.c
 
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/**
 
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 * Copyright (C) 2007 International Business Machines
 
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 * Author(s): Michael Halcrow <mhalcrow@us.ibm.com>
 
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 *
 
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 * This program is free software; you can redistribute it and/or
 
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 * modify it under the terms of the GNU General Public License as
 
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 * published by the Free Software Foundation; either version 2 of the
 
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 * License, or (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful, but
 
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 * WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
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 * General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, write to the Free Software
 
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 
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 * 02111-1307, USA.
 
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 */
 
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#include <stdio.h>
 
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#include <ecryptfs.h>
 
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#include "config.h"
 
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void usage(void)
 
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{
 
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        printf("Usage:\n"
 
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               "\n"
 
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               "ecryptfs_unwrap_passphrase [file] [wrapping passphrase]\n"
 
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               "\n");
 
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}
 
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int main(int argc, char *argv[])
 
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{
 
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        char *file;
 
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        char passphrase[ECRYPTFS_MAX_PASSWORD_LENGTH + 1];
 
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        char *wrapping_passphrase;
 
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        char salt[ECRYPTFS_SALT_SIZE];
 
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        char salt_hex[ECRYPTFS_SALT_SIZE_HEX];
 
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        int rc = 0;
 
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        if (argc != 3) {
 
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                usage();
 
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                goto out;
 
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        }
 
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        file = argv[1];
 
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        wrapping_passphrase = argv[2];
 
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        rc = ecryptfs_read_salt_hex_from_rc(salt_hex);
 
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        if (rc) {
 
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                printf("Unable to read salt value from user's "
 
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                       ".ecryptfsrc file; using default\n");
 
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                from_hex(salt, ECRYPTFS_DEFAULT_SALT_HEX, ECRYPTFS_SALT_SIZE);
 
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        } else
 
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                from_hex(salt, salt_hex, ECRYPTFS_SALT_SIZE);
 
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        if ((rc = ecryptfs_unwrap_passphrase(passphrase, file,
 
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                                             wrapping_passphrase, salt))) {
 
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                printf("Error attempting to unwrap passphrase; rc = [%d]. "
 
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                       "Check the system log for more information from "
 
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                       "libecryptfs.\n", rc);
 
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                rc = 1;
 
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                goto out;
 
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        }
 
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        printf("%s", passphrase);
 
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out:
 
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        return rc;
 
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}