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decode: split _remove_armor() from verify()

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This commit is contained in:
Roman Zeyde 2016-05-26 22:26:52 +03:00
parent 7570861765
commit dcf35c4267
1 changed files with 7 additions and 6 deletions
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13
trezor_agent/gpg/decode.py
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@ -319,17 +319,18 @@ def verify_digest(pubkey, digest, signature, label):
raise
def verify(pubkey, signature, original_data):
"""Verify correctness of public key and signature."""
stream = io.BytesIO(signature)
# remove GPG armor
def _remove_armor(armored_data):
stream = io.BytesIO(armored_data)
lines = stream.readlines()[3:-1]
data = base64.b64decode(b''.join(lines))
payload, checksum = data[:-3], data[-3:]
assert util.crc24(payload) == checksum
stream = io.BytesIO(payload)
return payload
def verify(pubkey, signature, original_data):
"""Verify correctness of public key and signature."""
stream = io.BytesIO(_remove_armor(signature))
signature, digest = load_signature(stream, original_data)
verify_digest(pubkey=pubkey, digest=digest,
signature=signature['sig'], label='GPG signature')