# packets so I can tell if a signature is made by pgp2 to enable the
# pgp2 encrypting mode.
-import sys, StringIO, os, tempfile, re;
-import time, fcntl, anydbm
-import email, email.message
+import sys
+import StringIO
+import os
+import tempfile
+import re
+import time
+import fcntl
+import anydbm
+import email
+import email.message
from userdir_exceptions import *
# General GPG options
GPGPath = "gpg"
-# "--load-extension","rsa",
-GPGBasicOptions = [
- "--no-options",
- "--batch",
- "--no-default-keyring",
- "--secret-keyring", "/dev/null",
- "--always-trust"];
-GPGKeyRings = [];
-GPGSigOptions = ["--output","-"];
-GPGSearchOptions = ["--dry-run","--with-colons","--fingerprint"];
-GPGEncryptOptions = ["--output","-","--quiet","--always-trust",\
- "--armor","--encrypt"];
-GPGEncryptPGP2Options = ["--set-filename","","--rfc1991",\
- "--load-extension","idea",\
- "--cipher-algo","idea"] + GPGEncryptOptions;
+# "--load-extension", "rsa",
+GPGBasicOptions = ["--no-options",
+ "--batch",
+ "--no-default-keyring",
+ "--secret-keyring", "/dev/null",
+ "--always-trust"]
+GPGKeyRings = []
+GPGSigOptions = ["--output", "-"]
+GPGSearchOptions = ["--dry-run", "--with-colons", "--fingerprint",
+ "--fingerprint", "--fixed-list-mode"]
+GPGEncryptOptions = ["--output", "-", "--quiet", "--always-trust",
+ "--armor", "--encrypt"]
+GPGEncryptPGP2Options = ["--set-filename", "", "--rfc1991",
+ "--load-extension", "idea",
+ "--cipher-algo", "idea"] + GPGEncryptOptions
# Replay cutoff times in seconds
-CleanCutOff = 7*24*60*60;
-AgeCutOff = 4*24*60*60;
-FutureCutOff = 3*24*60*60;
+CleanCutOff = 7 * 24 * 60 * 60
+AgeCutOff = 4 * 24 * 60 * 60
+FutureCutOff = 3 * 24 * 60 * 60
+
def ClearKeyrings():
del GPGKeyRings[:]
+
# Set the keyrings, the input is a list of keyrings
def SetKeyrings(Rings):
for x in Rings:
- GPGKeyRings.append("--keyring");
- GPGKeyRings.append(x);
+ GPGKeyRings.append("--keyring")
+ GPGKeyRings.append(x)
+
# GetClearSig takes an un-seekable email message stream (mimetools.Message)
# and returns a standard PGP '---BEGIN PGP SIGNED MESSAGE---' bounded
#
# lax_multipart: treat multipart bodies other than multipart/signed
# as one big plain text body
-def GetClearSig(Msg, Paranoid = 0, lax_multipart = False):
+def GetClearSig(Msg, Paranoid=0, lax_multipart=False):
if not Msg.__class__ == email.message.Message:
raise RuntimeError, "GetClearSign() not called with a email.message.Message"
# original signed block [needs to convert to \r\n]
Output = "-----BEGIN PGP SIGNED MESSAGE-----\r\n";
# Semi-evil hack to get the proper hash type inserted in the message
- if Msg.get_param('micalg') != None:
- Output = Output + "Hash: MD5,SHA1,%s\r\n"%(Msg.get_param('micalg')[4:].upper())
+ if Msg.get_param('micalg') is not None:
+ Output = Output + "Hash: SHA1,%s\r\n"%(Msg.get_param('micalg')[4:].upper())
Output = Output + "\r\n";
Output = Output + Signed.as_string().replace("\n-","\n- -") + "\n" + Signature.get_payload(decode=True)
return (Output,1);
InPipe[0] = -1;
# Send the message
- if Message != None:
+ if Message is not None:
try:
os.write(InPipe[1],Message);
except:
Output.close();
GPGText.close();
+
+
# This takes a text passage, a destination and a flag indicating the
# compatibility to use and returns an encrypted message to the recipient.
# It is best if the recipient is specified using the hex key fingerprint
# of the target, ie 0x64BE1319CCF6D393BF87FF9358A6D4EE
def GPGEncrypt(Message,To,PGP2):
- Error = "KeyringError"
+ class KeyringError(Exception): pass
# Encrypt using the PGP5 block encoding and with the PGP5 option set.
# This will handle either RSA or DSA/DH asymetric keys.
# In PGP2 compatible mode IDEA and rfc1991 encoding are used so that
# can read a message encrypted with blowfish and RSA.
searchkey = GPGKeySearch(To);
if len(searchkey) == 0:
- raise Error, "No key found matching %s"%(To);
+ raise KeyringError("No key found matching %s"%(To))
elif len(searchkey) > 1:
- raise Error, "Multiple keys found matching %s"%(To);
+ raise KeyringError("Multiple keys found matching %s"%(To))
if searchkey[0][4].find("E") < 0:
- raise Error, "Key %s has no encryption capability - are all encryption subkeys expired or revoked? Are there any encryption subkeys?"%(To);
+ raise KeyringError("Key %s has no encryption capability - are all encryption subkeys expired or revoked? Are there any encryption subkeys?"%(To))
if PGP2 == 0:
try:
Text = Res[2].read();
return Text;
finally:
- if Res != None:
+ if Res is not None:
Res[1].close();
Res[2].close();
else:
os.unlink(TmpName);
except:
pass;
- if Res != None:
+ if Res is not None:
Res[1].close();
Res[2].close();
# Good signature response
if Split[1] == "GOODSIG":
# Just in case GPG returned a bad signal before this (bug?)
- if Why == None:
+ if Why is None:
GoodSig = 1;
KeyID = Split[2];
Owner = ' '.join(Split[3:])
Text = Res[2].read();
# A gpg failure is an automatic bad signature
- if Exit[1] != 0 and Why == None:
+ if Exit[1] != 0 and Why is None:
GoodSig = 0;
Why = "GPG execution returned non-zero exit status: " + str(Exit[1]);
- if GoodSig == 0 and (Why == None or len(Why) == 0):
+ if GoodSig == 0 and (Why is None or len(Why) == 0):
Why = "Checking Failed";
# Try to decide if this message was sent using PGP2
PGP2Message = 0;
- if (re.search("-----[\n\r][\n\r]?Version: 2\\.",Message) != None):
+ if (re.search("-----[\n\r][\n\r]?Version: 2\\.",Message) is not None):
PGP2Message = 1;
return (Why,(SigId,Date,KeyFinger),(KeyID,KeyFinger,Owner,0,PGP2Message),Text);
finally:
- if Res != None:
+ if Res is not None:
Res[1].close();
Res[2].close();
def GPGKeySearch(SearchCriteria):
Args = [GPGPath] + GPGBasicOptions + GPGKeyRings + GPGSearchOptions + \
[SearchCriteria," 2> /dev/null"]
- Strm = None;
- Result = [];
- Owner = "";
- KeyID = "";
+ Strm = None
+ Result = []
+ Validity = None
+ Length = 0
+ KeyID = ""
Capabilities = ""
- Expired = None;
- Hits = {};
+ Fingerprint = ""
+ Owner = ""
+ Hits = {}
dir = os.path.expanduser("~/.gnupg")
if not os.path.isdir(dir):
os.mkdir(dir, 0700)
try:
+ # The GPG output will contain zero or more stanza, one stanza per match found.
+ # Each stanza consists of the following records, in order:
+ # tru : trust database information
+ # pub : primary key from which we extract
+ # field 1 - Validity
+ # field 2 - Length
+ # field 4 - KeyID
+ # field 11 - Capabilities
+ # fpr : fingerprint of primary key from which we extract
+ # field 9 - Fingerprint
+ # uid : first User ID attached to primary key from which we extract
+ # Field 9 - Owner
+ # uid : (optional) additional multiple User IDs attached to primary key
+ # sub : (optional) secondary key
+ # fpr : (opitonal) fingerprint of secondary key if sub is present
Strm = os.popen(" ".join(Args),"r")
-
+ Want = "pub"
while(1):
- # Grab and split up line
- Line = Strm.readline();
+ Line = Strm.readline()
if Line == "":
- break;
+ break
Split = Line.split(":")
- # Store some of the key fields
- if Split[0] == 'pub':
- KeyID = Split[4];
- Owner = Split[9];
+ if Split[0] != Want:
+ continue
+
+ if Want == 'pub':
+ Validity = Split[1]
Length = int(Split[2])
+ KeyID = Split[4]
Capabilities = Split[11]
- Expired = Split[1] == 'e'
-
- # Output the key
- if Split[0] == 'fpr':
- if Hits.has_key(Split[9]):
- continue;
- Hits[Split[9]] = None;
- if not Expired:
- Result.append( (KeyID,Split[9],Owner,Length,Capabilities) );
+ Want = 'fpr'
+ continue
+
+ if Want == 'fpr':
+ Fingerprint = Split[9]
+ if Hits.has_key(Fingerprint):
+ Want = 'pub' # already seen, skip to next stanza
+ else:
+ Hits[Fingerprint] = None
+ Want = 'uid'
+ continue
+
+ if Want == 'uid':
+ Owner = Split[9]
+ if Validity != 'e': # if not expired
+ Result.append( (KeyID,Fingerprint,Owner,Length,Capabilities) )
+ Want = 'pub' # finished, skip to next stanza
+ continue
+
finally:
- if Strm != None:
- Strm.close();
- return Result;
+ if Strm is not None:
+ Strm.close()
+ return Result
# Print the available key information in a format similar to GPG's output
# We do not know the values of all the feilds so they are just replaced
# Check a signature. 'sig' is a 3 tuple that has the sigId, date and
# key ID
def Check(self,Sig):
- if Sig[0] == None or Sig[1] == None or Sig[2] == None:
+ if Sig[0] is None or Sig[1] is None or Sig[2] is None:
return "Invalid signature";
if int(Sig[1]) > time.time() + self.FutureCutOff:
return "Signature has a time too far in the future";
# Add a signature, the sig is the same as is given to Check
def Add(self,Sig):
- if Sig[0] == None or Sig[1] == None:
+ if Sig[0] is None or Sig[1] is None:
raise RuntimeError,"Invalid signature";
if Sig[1] < time.time() - self.CleanCutOff:
return;
def process(self, sig_info):
r = self.Check(sig_info);
- if r != None:
- raise RuntimeError, "The replay cache rejected your message: %s."%(r);
- self.Add(sig_info);
- self.close();
+ if r is not None:
+ raise RuntimeError, "The replay cache rejected your message: %s." % (r,)
+ self.Add(sig_info)
+ self.close()
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projects / mirror / userdir-ldap.git / blobdiff