This line works perfectly in python 2.7.6, but fails in Python 3.3.5. How i can decode to hex value in Python 3.
return x.replace(' ', '').replace('\n', '').decode('hex')
Traceback
AttributeError: 'str' object has no attribute 'decode'
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Maybe duplicated: see this postSalvatore Avanzo– Salvatore Avanzo2014-04-12 17:30:10 +00:00Commented Apr 12, 2014 at 17:30
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3The Heartbleed Python script is written for Python 2, not Python 3 :-) You'll need to address more issues other than the payload definition.Martijn Pieters– Martijn Pieters2014-04-12 17:40:38 +00:00Commented Apr 12, 2014 at 17:40
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@MartijnPieters I sense that we are going to be getting many similar quetsions very soon...anon582847382– anon5828473822014-04-12 17:45:38 +00:00Commented Apr 12, 2014 at 17:45
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1@rcomp Note that the script has been ported to Python 3 by the github community: gist.github.com/dyatlov/10192468anon582847382– anon5828473822014-04-12 17:48:04 +00:00Commented Apr 12, 2014 at 17:48
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1 Answer
To convert hexadecimal to a string, use binascii.unhexlify.
>>> from binascii import unhexlify
>>> unhexlify(x.replace(' ', '').replace('\n', ''))
However, you first need to make x into bytes to make this work, for Python 3. Do this by doing:
>>> x = x.encode('ascii', 'strict')
And then do the hex-to-string conversion.
5 Comments
Martijn Pieters
Looking at the original source the point is to produce bytes to send over a socket. The decode isn't needed in that case.
Martijn Pieters
NP, I was just answering a different question about the same script and recognized the line.
jfs
note:
x.encode('ascii', 'strict') is not necessary on Python before/after 3.2
anon582847382
@J.F.Sebastian I don't quite understand you, but would what I have done in my edit be preferrable?
jfs
unhexlify() doesn't work with str objects in Python 3.2. Assuming that x contains hexdigits then you could use x.encode('ascii', 'strict') to convert str object to bytes.