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/**
* Copyright (C) 2007 International Business Machines
* Author(s): Michael Halcrow <mhalcrow@us.ibm.com>
* Dustin Kirkland <kirkland@ubuntu.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <stdio.h>
#include <string.h>
#include <ecryptfs.h>
void usage(void)
{
printf("Usage:\n"
"ecryptfs-add-passphrase [--fnek]\n"
"or\n"
"printf \"%%s\" \"passphrase\" | ecryptfs-add-passphrase"
" [--fnek] -\n"
"\n");
}
int main(int argc, char *argv[])
{
char *passphrase;
char auth_tok_sig_hex[ECRYPTFS_SIG_SIZE_HEX + 1];
char salt[ECRYPTFS_SALT_SIZE];
char salt_hex[ECRYPTFS_SALT_SIZE_HEX];
int rc = 0;
int fnek = 0;
uint32_t version;
if (argc == 1) {
/* interactive mode */
passphrase = ecryptfs_get_passphrase("Passphrase");
} else if (argc == 2 &&
strlen(argv[1]) == 6 && strncmp(argv[1], "--fnek", 6) == 0) {
/* interactive mode, plus fnek */
passphrase = ecryptfs_get_passphrase("Passphrase");
fnek = 1;
} else if (argc == 2 &&
strlen(argv[1]) == 1 && strncmp(argv[1], "-", 1) == 0) {
/* stdin mode */
passphrase = ecryptfs_get_passphrase(NULL);
} else if (argc == 3 &&
/* stdin mode, plus fnek */
(strlen(argv[1])==6 && strncmp(argv[1], "--fnek", 6)==0) &&
(strlen(argv[2])==1 && strncmp(argv[2], "-", 1)==0)) {
passphrase = ecryptfs_get_passphrase(NULL);
fnek = 1;
} else {
usage();
goto out;
}
if (passphrase == NULL ||
strlen(passphrase) > ECRYPTFS_MAX_PASSWORD_LENGTH) {
usage();
rc = 1;
goto out;
}
if (fnek == 1) {
rc = ecryptfs_get_version(&version);
if (rc!=0 || !ecryptfs_supports_filename_encryption(version)) {
fprintf(stderr, "%s\n", ECRYPTFS_ERROR_FNEK_SUPPORT);
rc = 1;
goto out;
}
}
rc = ecryptfs_read_salt_hex_from_rc(salt_hex);
if (rc) {
from_hex(salt, ECRYPTFS_DEFAULT_SALT_HEX, ECRYPTFS_SALT_SIZE);
} else
from_hex(salt, salt_hex, ECRYPTFS_SALT_SIZE);
if ((rc = ecryptfs_add_passphrase_key_to_keyring(auth_tok_sig_hex,
passphrase,
salt)) < 0) {
fprintf(stderr, "%s [%d]\n", ECRYPTFS_ERROR_INSERT_KEY, rc);
fprintf(stderr, "%s\n", ECRYPTFS_INFO_CHECK_LOG);
rc = 1;
goto out;
} else
rc = 0;
auth_tok_sig_hex[ECRYPTFS_SIG_SIZE_HEX] = '\0';
printf("Inserted auth tok with sig [%s] into the user session "
"keyring\n", auth_tok_sig_hex);
if (fnek == 0) {
goto out;
}
/* If we make it here, filename encryption is enabled, and it has
* been requested that we add the fnek to the keyring too
*/
if ((rc = ecryptfs_add_passphrase_key_to_keyring(auth_tok_sig_hex,
passphrase,
ECRYPTFS_DEFAULT_SALT_FNEK_HEX)) < 0) {
fprintf(stderr, "%s [%d]\n", ECRYPTFS_ERROR_INSERT_KEY, rc);
fprintf(stderr, "%s\n", ECRYPTFS_INFO_CHECK_LOG);
rc = 1;
goto out;
} else
rc = 0;
auth_tok_sig_hex[ECRYPTFS_SIG_SIZE_HEX] = '\0';
printf("Inserted auth tok with sig [%s] into the user session "
"keyring\n", auth_tok_sig_hex);
out:
return rc;
}
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