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Merge pull request #30 from np/decode-subpackets

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gpg/decode/parse_subpackets: parse subpacket length according to RFC
This commit is contained in:
Roman Zeyde
2016-09-05 20:52:48 +03:00
committed by GitHub
parent 73bdf417e4 adcbe6e7b2
commit 0c4e67c837
1 changed files with 8 additions and 1 deletions
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9
trezor_agent/gpg/decode.py
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@@ -25,10 +25,17 @@ def parse_subpackets(s):
while True: while True:
try: try:
subpacket_len = s.readfmt('B') first = s.readfmt('B')
except EOFError: except EOFError:
break break
if first < 192:
subpacket_len = first
elif first < 255:
subpacket_len = ((first - 192) << 8) + s.readfmt('B') + 192
else: # first == 255
subpacket_len = s.readfmt('>L')
subpackets.append(s.read(subpacket_len)) subpackets.append(s.read(subpacket_len))
return subpackets return subpackets