Parse attrib-bits field when its included in file attributes#139
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bschmeck wants to merge 5 commits intonet-ssh:masterfrom
Open
Parse attrib-bits field when its included in file attributes#139bschmeck wants to merge 5 commits intonet-ssh:masterfrom
bschmeck wants to merge 5 commits intonet-ssh:masterfrom
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The attrib-bits field was introduced in V05 of the SFTP spec and needs to be parsed from the attributes struct when parsing file data. Without handling attrib-bits, we wind up off by 4 bytes for each entry in the filename data and quickly wind up parsing gibberish.
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@bschmeck thanks looks great to me. Does it makes sense to add tests too?! |
Author
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Sorry for the delay here, I got pulled into other things and then went on vacation. I realized that version 6 also has an attributes bits field, so I reworked things slightly and now I also added test for the new |
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Version 5 of the SFTP spec introduced an optional
attrib-bitsfield (spec). When a server returns that data and we don't handle the 4 byte field, we quickly wind up parsing gibberish. (In my case, I wound up looping forever over a non-existent ACL entry and OOM'd my box.)Changes between v4 and v5: https://datatracker.ietf.org/doc/html/draft-ietf-secsh-filexfer-05#section-10.1
v5 file attributes struct definition: https://datatracker.ietf.org/doc/html/draft-ietf-secsh-filexfer-05#section-5