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#!/usr/bin/python
# $Id$
#
# This file is part of seppl.
#
# seppl 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.
#
# seppl 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 seppl; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
import getopt, sys
from seppl_common import *
import xml.sax, xml.sax.handler
name = None
algorithm = None
bits = 0
reverse = 0
PROC_FILE_NAME = "/proc/net/seppl_keyring"
file = None
class KeyContentHandler(xml.sax.handler.ContentHandler):
last = None
def startElement(self, name, attrs):
self.last = name
if name != "key":
return
self.name = ""
self.algorithm = ""
self.bits = ""
self.data = ""
def endElement(self, n):
global name, algorithm, bits
self.last = None
if n != "key":
return
if self.name == "":
self.name = "def"
if self.algorithm == "":
self.algorithm = "aes"
if self.bits == "":
self.bits = 128
else:
self.bits = int(self.bits)
a = find_alg_by_name(self.algorithm, self.bits)
if a == -1:
raise xml.sax.SAXNotRecognizedException("Cipher not known")
key = parse_key(self.data)
if key is None or len(key) != self.bits/8:
raise xml.sax.SAXNotRecognizedException("Could not parse key data.")
if (name is None or name == self.name) and (algorithm is None or algorithm == self.algorithm) and (bits == 0 or bits == self.bits):
dump_key_bin(a, self.name, key)
def characters(self, content):
content = content.strip()
if len(content) == 0:
return
if self.last == "name":
self.name += content
return
if self.last == "algorithm":
self.algorithm += content
return
if self.last == "bits":
self.bits += content
return
if self.last == "data":
self.data += content
return
raise xml.sax.SAXNotRecognizedException("Malformed XML structure |%s|%s|" % (self.last, content))
def usage():
global name, algorithm, bits, reverse, file
print "%s:" % sys.argv[0]
print " -h --help Show this help"
print " -r --reverse Convert XML to binary, instead of the other way round (%s)" % { 0 : "disabled", 1 : "enabled" }[reverse]
print " -a --algorithm ALGORITHM Show only keys with algorithm (%s)" % algorithm
print " -b --bits BITS Show only keys with bit length (%s)" % bits
print " -n --name NAME Show only keys with name (%s)" % name
print " -f --file FILE Specify file (- for STDIN) (%s)" % file
pass
def main():
global name, algorithm, bits, reverse, file
try:
opts, args = getopt.getopt(sys.argv[1:], "hn:a:b:rf:", ["help", "name=", "algorithm=", "bits=", "reverse", "file"])
except getopt.GetoptError:
usage()
sys.exit(2)
u = 0
for o, a in opts:
if o in ("-h", "--help"):
u = 1
if o in ("-n", "--name"):
name = a[:7]
if o in ("-a", "--algorithm"):
algorithm = a
if o in ("-b", "--bits"):
bits = int(a)
if o in ("-r", "--reverse"):
reverse = 1
if o in ("-f", "--file"):
file = a
if file is None:
if reverse:
file = "-"
else:
file = PROC_FILE_NAME
if u:
usage()
sys.exit(0)
if file == "-":
buf = sys.stdin.read();
else:
try:
fd = open(file, "r+")
buf = fd.read();
fd.close()
except IOError, e:
sys.stderr.write("Could not open proc-file (%s).\n" % str(e))
sys.exit(2)
if len(buf) == 0:
sys.exit(0)
if buf[0] == '<':
reverse = 1
if not reverse:
print "<seppl-keyring>"
while len(buf) >= 8:
a, _name = unpack("B7s", buf[:8])
n, b = find_alg_by_number(a)
if (b == 0):
sys.stderr.write("ERROR: Unknown cipher. Please update.\n")
break
_name = _name.replace("\000", "")
if (name is None or name == _name) and (algorithm is None or algorithm == n) and (bits == 0 or b == bits):
dump_key_xml(a, _name, buf[8:b/8+8])
buf = buf[8+b/8:]
print "</seppl-keyring>"
else:
try:
xml.sax.parseString(buf, KeyContentHandler())
except xml.sax.SAXException, e:
sys.stderr.write("Parse error (%s)\n" %str(e))
if __name__ == "__main__":
main()
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