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gpg: refactor sign_message method

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This commit is contained in:
Roman Zeyde
2016-06-06 22:52:10 +03:00
parent a05cff5079
commit 3b139314b6
1 changed files with 19 additions and 14 deletions
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33
trezor_agent/gpg/encode.py
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@@ -172,6 +172,23 @@ def create_subkey(primary_bytes, pubkey, signer_func, ecdh=False):
return primary_bytes + subkey_packet + sign_packet
def sign_message(signer_func, msg, pubkey, sign_time):
"""Sign GPG message at specified time."""
log.info('signing %d byte message at %s',
len(msg), _time_format(sign_time))
hashed_subpackets = [proto.subpacket_time(sign_time)]
unhashed_subpackets = [
proto.subpacket(16, pubkey.key_id())] # issuer key id
blob = proto.make_signature(
signer_func=signer_func,
data_to_sign=msg,
public_algo=pubkey.algo_id,
hashed_subpackets=hashed_subpackets,
unhashed_subpackets=unhashed_subpackets)
return proto.packet(tag=2, blob=blob)
class Factory(object):
"""Performs GPG signing operations."""
@@ -217,20 +234,8 @@ class Factory(object):
"""Sign GPG message at specified time."""
if sign_time is None:
sign_time = int(time.time())
log.info('signing %d byte message at %s',
len(msg), _time_format(sign_time))
hashed_subpackets = [proto.subpacket_time(sign_time)]
unhashed_subpackets = [
proto.subpacket(16, self.pubkey.key_id())] # issuer key id
blob = proto.make_signature(
signer_func=self.conn.sign,
data_to_sign=msg,
public_algo=self.pubkey.algo_id,
hashed_subpackets=hashed_subpackets,
unhashed_subpackets=unhashed_subpackets)
return proto.packet(tag=2, blob=blob)
return sign_message(signer_func=self.conn.sign, pubkey=self.pubkey,
msg=msg, sign_time=sign_time)
def get_shared_secret(self, pubkey):
"""Derive shared secret using ECDH from remote public key."""