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#
# crypto.py
#
# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# Author(s): Dave Lehman <dlehman@redhat.com>
#
import os
import iutil
from ..errors import *
import gettext
_ = lambda x: gettext.ldgettext("anaconda", x)
def is_luks(device):
rc = iutil.execWithRedirect("cryptsetup",
["isLuks", device],
stdout = "/dev/null",
stderr = "/dev/null",
searchPath = 1)
if rc:
return False
else:
return True
def luks_uuid(device):
uuid = iutil.execWithCapture("cryptsetup",
["luksUUID", device],
stderr="/dev/null")
return uuid.strip()
def luks_status(name):
"""0 means active, 1 means inactive (or non-existent)"""
rc = iutil.execWithRedirect("cryptsetup",
["status", name],
stdout = "/dev/null",
stderr = "/dev/null",
searchPath = 1)
return rc
def luks_format(device,
passphrase=None, key_file=None,
cipher=None, key_size=None):
p = os.pipe()
argv = ["-q"]
os.close(p[1])
if cipher:
argv.extend(["--cipher", cipher])
if key_size:
argv.append("--key-size=%d" % key_size)
argv.extend(["luksFormat", device])
if passphrase:
os.write(p[1], "%s\n" % passphrase)
elif key_file and os.path.isfile(key_file):
argv.append(key_file)
else:
raise ValueError("luks_format requires either a passphrase or a key file")
rc = iutil.execWithRedirect("cryptsetup",
argv,
stdin = p[0],
stdout = "/dev/null",
stderr = "/dev/null",
searchPath = 1)
os.close(p[0])
if rc:
raise CryptoError("luks_format failed for '%s'" % device)
def luks_open(device, name, passphrase=None, key_file=None):
p = os.pipe()
if passphrase:
os.write(p[1], "%s\n" % passphrase)
argv = ["luksOpen", device, name]
elif key_file and os.path.isfile(key_file):
argv = ["luksOpen", "--key-file", key_file, device, name]
else:
raise ValueError("luks_open requires either a passphrase or a key file")
os.close(p[1])
rc = iutil.execWithRedirect("cryptsetup",
argv,
stdin = p[0],
stdout = "/dev/null",
stderr = "/dev/null",
searchPath = 1)
os.close(p[0])
if rc:
raise CryptoError("luks_open failed for %s (%s)" % (device, name))
def luks_close(name):
rc = iutil.execWithRedirect("cryptsetup",
["luksClose", name],
stdout = "/dev/null",
stderr = "/dev/null",
searchPath = 1)
if rc:
raise CryptoError("luks_close failed for %s" % name)
def luks_add_key(device,
new_passphrase=None, new_key_file=None,
passphrase=None, key_file=None):
p = os.pipe()
if passphrase:
os.write(p[1], "%s\n" % passphrase)
key_spec = ""
elif key_file and os.path.isfile(key_file):
key_spec = "--key-file %s" % key_file
else:
raise ValueError("luks_add_key requires either a passphrase or a key file")
if new_passphrase:
os.write(p[1], "%s\n" % new_passphrase)
new_key_spec = ""
elif new_key_file and os.path.isfile(new_key_file):
new_key_spec = "%s" % new_key_file
else:
raise ValueError("luks_add_key requires either a passphrase or a key file to add")
os.close(p[1])
rc = iutil.execWithRedirect("cryptsetup",
["-q",
key_spec,
"luksAddKey",
device,
new_key_spec],
stdin = p[0],
stdout = "/dev/null",
stderr = "/dev/null",
searchPath = 1)
os.close(p[0])
if rc:
raise CryptoError("luks add key failed")
def luks_remove_key(device,
del_passphrase=None, del_key_file=None,
passphrase=None, key_file=None):
p = os.pipe()
if passphrase:
os.write(p[1], "%s\n" % passphrase)
key_spec = ""
elif key_file and os.path.isfile(key_file):
key_spec = "--key-file %s" % key_file
else:
raise ValueError("luks_remove_key requires either a passphrase or a key file")
if del_passphrase:
os.write(p[1], "%s\n" % del_passphrase)
del_key_spec = ""
elif del_key_file and os.path.isfile(del_key_file):
del_key_spec = "%s" % del_key_file
else:
raise ValueError("luks_remove_key requires either a passphrase or a key file to remove")
os.close(p[1])
rc = iutil.execWithRedirect("cryptsetup",
["-q",
key_spec,
"luksRemoveKey",
device,
del_key_spec],
stdin = p[0],
stdout = "/dev/null",
stderr = "/dev/null",
searchPath = 1)
os.close(p[0])
if rc:
raise CryptoError("luks_remove_key failed")
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