self.sigs = []
self.keys = []
+class ReplyInfo (object):
+ def __init__(self):
+ self.replies = None
+
+ self.target_key = None
+ self.fallback_target_key = None
+ self.msg_to_quote = ""
+
+ self.success_decrypt = False
+ self.failed_decrypt = False
+ self.public_key_received = False
+ self.no_public_key = False
+ self.sig_success = False
+ self.sig_failure = False
+
def main ():
email_to, email_from, email_subject = email_to_from_subject(email_text)
lang = import_lang(email_to)
- reply_plaintext = build_reply(email_struct)
+ replyinfo_obj = ReplyInfo()
+ replyinfo_obj.replies = lang.replies
+
+ prepare_for_reply(email_struct, replyinfo_obj)
+ encrypt_to_key = get_key_from_fp(replyinfo_obj, gpgme_ctx)
+ reply_plaintext = write_reply(replyinfo_obj)
- debug(lang.replies['success_decrypt'])
- print(reply_plaintext)
+ # TODO error handling for missing keys and setting .no_public_key
+ reply_mime = generate_encrypted_mime(reply_plaintext, email_from, \
+ email_subject, encrypt_to_key,
+ gpgme_ctx)
-# encrypt_to_key = choose_reply_encryption_key(gpgme_ctx, fingerprints)
-#
-# reply_mime = generate_encrypted_mime(plaintext, email_from, \
-# email_subject, encrypt_to_key,
-# gpgme_ctx)
+ print(reply_mime)
def get_gpg_context (gnupghome, sign_with_key_fp):
email_struct = email.parser.Parser().parsestr(email_text)
- eddy_obj = parse_mime(email_struct)
- split_payloads(eddy_obj)
- gpg_on_payloads(eddy_obj, gpgme_ctx)
+ eddymsg_obj = parse_mime(email_struct)
+ split_payloads(eddymsg_obj)
+ gpg_on_payloads(eddymsg_obj, gpgme_ctx)
- return eddy_obj
+ return eddymsg_obj
def parse_mime(msg_struct):
- eddy_obj = EddyMsg()
+ eddymsg_obj = EddyMsg()
if msg_struct.is_multipart() == True:
payloads = msg_struct.get_payload()
- eddy_obj.multipart = True
- eddy_obj.subparts = list(map(parse_mime, payloads))
+ eddymsg_obj.multipart = True
+ eddymsg_obj.subparts = list(map(parse_mime, payloads))
else:
- eddy_obj = get_subpart_data(msg_struct)
+ eddymsg_obj = get_subpart_data(msg_struct)
- return eddy_obj
+ return eddymsg_obj
def scan_and_split (payload_piece, match_type, pattern):
return obj
-def do_to_eddys_pieces (function_to_do, eddy_obj, data):
+def do_to_eddys_pieces (function_to_do, eddymsg_obj, data):
- if eddy_obj.multipart == True:
- result_list = []
- for sub in eddy_obj.subparts:
- result_list += do_to_eddys_pieces(function_to_do, sub, data)
+ if eddymsg_obj.multipart == True:
+ for sub in eddymsg_obj.subparts:
+ do_to_eddys_pieces(function_to_do, sub, data)
else:
- result_list = [function_to_do(eddy_obj, data)]
+ function_to_do(eddymsg_obj, data)
- return result_list
-
-def split_payloads (eddy_obj):
+def split_payloads (eddymsg_obj):
for match_type in match_types:
- do_to_eddys_pieces(split_payload_pieces, eddy_obj, match_type)
+ do_to_eddys_pieces(split_payload_pieces, eddymsg_obj, match_type)
-def split_payload_pieces (eddy_obj, match_type):
+def split_payload_pieces (eddymsg_obj, match_type):
(match_name, pattern) = match_type
new_pieces_list = []
- for piece in eddy_obj.payload_pieces:
+ for piece in eddymsg_obj.payload_pieces:
new_pieces_list += scan_and_split(piece, match_name, pattern)
- eddy_obj.payload_pieces = new_pieces_list
+ eddymsg_obj.payload_pieces = new_pieces_list
-def gpg_on_payloads (eddy_obj, gpgme_ctx, prev_parts=[]):
+def gpg_on_payloads (eddymsg_obj, gpgme_ctx, prev_parts=[]):
- if eddy_obj.multipart == True:
+ if eddymsg_obj.multipart == True:
prev_parts=[]
- for sub in eddy_obj.subparts:
+ for sub in eddymsg_obj.subparts:
gpg_on_payloads (sub, gpgme_ctx, prev_parts)
prev_parts += [sub]
+ return
- for piece in eddy_obj.payload_pieces:
+ for piece in eddymsg_obj.payload_pieces:
if piece.piece_type == "text":
# don't transform the plaintext.
pass
elif piece.piece_type == "message":
- (plaintext, sigs) = decrypt_block (piece.string, gpgme_ctx)
+ (plaintext, sigs) = decrypt_block(piece.string, gpgme_ctx)
if plaintext:
piece.gpg_data = GPGData()
+ piece.gpg_data.decrypted = True
piece.gpg_data.sigs = sigs
# recurse!
piece.gpg_data.plainobj = parse_pgp_mime(plaintext, gpgme_ctx)
elif piece.piece_type == "pubkey":
- fingerprints = add_gpg_key(piece.string, gpgme_ctx)
+ key_fps = add_gpg_key(piece.string, gpgme_ctx)
- if fingerprints != []:
+ if key_fps != []:
piece.gpg_data = GPGData()
- piece.gpg_data.keys = fingerprints
+ piece.gpg_data.keys = key_fps
elif piece.piece_type == "clearsign":
- (plaintext, fingerprints) = verify_clear_signature(piece.string, gpgme_ctx)
+ (plaintext, sig_fps) = verify_clear_signature(piece.string, gpgme_ctx)
- if fingerprints != []:
+ if sig_fps != []:
piece.gpg_data = GPGData()
- piece.gpg_data.sigs = fingerprints
+ piece.gpg_data.sigs = sig_fps
piece.gpg_data.plainobj = parse_pgp_mime(plaintext, gpgme_ctx)
elif piece.piece_type == "detachedsig":
for prev in prev_parts:
payload_bytes = prev.payload_bytes
- sigs_fps = verify_detached_signature(piece.string, payload_bytes, gpgme_ctx)
+ sig_fps = verify_detached_signature(piece.string, payload_bytes, gpgme_ctx)
+
+ if sig_fps != []:
+ piece.gpg_data = GPGData()
+ piece.gpg_data.sigs = sig_fps
+ piece.gpg_data.plainobj = prev
+ break
- if sigs_fps != []:
- piece.gpg_data = GPGData()
- piece.gpg_data.sigs = sigs_fps
- piece.gpg_data.plainobj = prev
else:
pass
-def build_reply (eddy_obj):
+def prepare_for_reply (eddymsg_obj, replyinfo_obj):
+
+ do_to_eddys_pieces(prepare_for_reply_pieces, eddymsg_obj, replyinfo_obj)
- string = "\n".join(do_to_eddys_pieces(build_reply_pieces, eddy_obj, None))
+def prepare_for_reply_pieces (eddymsg_obj, replyinfo_obj):
- return string
+ for piece in eddymsg_obj.payload_pieces:
+ if piece.piece_type == "text":
+ # don't quote the plaintext part.
+ pass
+
+ elif piece.piece_type == "message":
+ if piece.gpg_data == None:
+ replyinfo_obj.failed_decrypt = True
+ else:
+ replyinfo_obj.success_decrypt = True
+
+ if replyinfo_obj.target_key != None:
+ continue
+ if piece.gpg_data.sigs != []:
+ replyinfo_obj.target_key = piece.gpg_data.sigs[0]
+ replyinfo_obj.msg_to_quote = flatten_payloads(piece.gpg_data.plainobj)
+
+ # to catch public keys in encrypted blocks
+ prepare_for_reply(piece.gpg_data.plainobj, replyinfo_obj)
+
+ elif piece.piece_type == "pubkey":
+ if piece.gpg_data == None:
+ replyinfo_obj.no_public_key = True
+ else:
+ replyinfo_obj.public_key_received = True
+ elif (piece.piece_type == "clearsign") \
+ or (piece.piece_type == "detachedsig"):
+ if piece.gpg_data == None:
+ replyinfo_obj.sig_failure = True
+ else:
+ replyinfo_obj.sig_success = True
-def build_reply_pieces (eddy_obj, _ignore):
+ if replyinfo_obj.target_key == None:
+ replyinfo_obj.fallback_target_key = piece.gpg_data.sigs[0]
- string = ""
- for piece in eddy_obj.payload_pieces:
+
+
+def flatten_payloads (eddymsg_obj):
+
+ flat_string = ""
+
+ if eddymsg_obj == None:
+ return ""
+
+ if eddymsg_obj.multipart == True:
+ for sub in eddymsg_obj.subparts:
+ flat_string += flatten_payloads (sub)
+
+ return flat_string
+
+ # todo: don't include nested decrypted messages.
+ for piece in eddymsg_obj.payload_pieces:
if piece.piece_type == "text":
- string += piece.string
- elif piece.gpg_data == None:
- string += "Hmmm... I wasn't able to get that part.\n"
+ flat_string += piece.string
elif piece.piece_type == "message":
- # recursive!
- string += build_reply(piece.gpg_data.plainobj)
- elif piece.piece_type == "pubkey":
- string += "thanks for your public key:"
- for key in piece.gpg_data.keys:
- string += "\n" + key
- elif piece.piece_type == "clearsign":
- string += "*** Begin signed part ***\n"
- string += build_reply(piece.gpg_data.plainobj)
- string += "\n*** End signed part ***"
- elif piece.piece_type == "detachedsig":
- string += "*** Begin detached signed part ***\n"
- string += build_reply(piece.gpg_data.plainobj)
- string += "*** End detached signed part ***\n"
+ flat_string += flatten_payloads(piece.plainobj)
+ elif ((piece.piece_type == "clearsign") \
+ or (piece.piece_type == "detachedsig")) \
+ and (piece.gpg_data != None):
+ flat_string += flatten_payloads (piece.gpg_data.plainobj)
+
+
+ return flat_string
- return string
+
+def get_key_from_fp (replyinfo_obj, gpgme_ctx):
+
+ if replyinfo_obj.target_key == None:
+ replyinfo_obj.target_key = replyinfo_obj.fallback_target_key
+
+ if replyinfo_obj.target_key != None:
+ try:
+ encrypt_to_key = gpgme_ctx.get_key(replyinfo_obj.target_key)
+ return encrypt_to_key
+
+ except:
+ pass
+
+ # no available key to use
+ replyinfo_obj.target_key = None
+ replyinfo_obj.fallback_target_key = None
+
+ replyinfo_obj.no_public_key = True
+ replyinfo_obj.public_key_received = False
+
+ return None
+
+
+def write_reply (replyinfo_obj):
+
+ reply_plain = ""
+
+ if replyinfo_obj.success_decrypt == True:
+ reply_plain += replyinfo_obj.replies['success_decrypt']
+
+ if replyinfo_obj.no_public_key == False:
+ quoted_text = email_quote_text(replyinfo_obj.msg_to_quote)
+ reply_plain += quoted_text
+
+ elif replyinfo_obj.failed_decrypt == True:
+ reply_plain += replyinfo_obj.replies['failed_decrypt']
+
+
+ if replyinfo_obj.sig_success == True:
+ reply_plain += "\n\n"
+ reply_plain += replyinfo_obj.replies['sig_success']
+
+ elif replyinfo_obj.sig_failure == True:
+ reply_plain += "\n\n"
+ reply_plain += replyinfo_obj.replies['sig_failure']
+
+
+ if replyinfo_obj.public_key_received == True:
+ reply_plain += "\n\n"
+ reply_plain += replyinfo_obj.replies['public_key_received']
+
+ elif replyinfo_obj.no_public_key == True:
+ reply_plain += "\n\n"
+ reply_plain += replyinfo_obj.replies['no_public_key']
+
+
+ reply_plain += "\n\n"
+ reply_plain += replyinfo_obj.replies['signature']
+
+ return reply_plain
def add_gpg_key (key_block, gpgme_ctx):
result = gpgme_ctx.import_(fp)
imports = result.imports
- fingerprints = []
+ key_fingerprints = []
if imports != []:
for import_ in imports:
fingerprint = import_[0]
- fingerprints += [fingerprint]
+ key_fingerprints += [fingerprint]
debug("added gpg key: " + fingerprint)
- return fingerprints
+ return key_fingerprints
def verify_clear_signature (sig_block, gpgme_ctx):
# FIXME: this might require using the charset of the mime part.
plaintext = ptxt_fp.getvalue().decode('utf-8')
- fingerprints = []
+ sig_fingerprints = []
for res_ in result:
- fingerprints += [res_.fpr]
+ sig_fingerprints += [res_.fpr]
- return plaintext, fingerprints
+ return plaintext, sig_fingerprints
def verify_detached_signature (detached_sig, plaintext_bytes, gpgme_ctx):
return ("",[])
plaintext = plain_b.getvalue().decode('utf-8')
- return (plaintext, sigs)
+
+ fingerprints = []
+ for sig in sigs:
+ fingerprints += [sig.fpr]
+ return (plaintext, fingerprints)
def choose_reply_encryption_key (gpgme_ctx, fingerprints):
def generate_encrypted_mime (plaintext, email_from, email_subject, encrypt_to_key,
gpgme_ctx):
+ # quoted printable encoding lets most ascii characters look normal
+ # before the decrypted mime message is decoded.
+ char_set = email.charset.Charset("utf-8")
+ char_set.body_encoding = email.charset.QP
- reply = "To: " + email_from + "\n"
- reply += "Subject: " + email_subject + "\n"
+ # MIMEText doesn't allow setting the text encoding
+ # so we use MIMENonMultipart.
+ plaintext_mime = MIMENonMultipart('text', 'plain')
+ plaintext_mime.set_payload(plaintext, charset=char_set)
if (encrypt_to_key != None):
- plaintext_reply = "thanks for the message!\n\n\n"
- plaintext_reply += email_quote_text(plaintext)
-
- # quoted printable encoding lets most ascii characters look normal
- # before the decrypted mime message is decoded.
- char_set = email.charset.Charset("utf-8")
- char_set.body_encoding = email.charset.QP
-
- # MIMEText doesn't allow setting the text encoding
- # so we use MIMENonMultipart.
- plaintext_mime = MIMENonMultipart('text', 'plain')
- plaintext_mime.set_payload(plaintext_reply, charset=char_set)
encrypted_text = encrypt_sign_message(plaintext_mime.as_string(),
encrypt_to_key,
message_mime.attach(encoded_mime)
message_mime['Content-Disposition'] = 'inline'
- reply += message_mime.as_string()
-
else:
- reply += "\n"
- reply += "Sorry, i couldn't find your key.\n"
- reply += "I'll need that to encrypt a message to you."
+ message_mime = plaintext_mime
+
+ message_mime['To'] = email_from
+ message_mime['Subject'] = email_subject
+
+ reply = message_mime.as_string()
return reply
projects / edward.git / blobdiff