Re: [hybi] 64-bit comment
Erik Möller <emoller@opera.com> Mon, 16 August 2010 15:12 UTC
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To: Ian Hickson <ian@hixie.ch>
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Date: Mon, 16 Aug 2010 17:13:12 +0200
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From: Erik Möller <emoller@opera.com>
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Cc: Hybi <hybi@ietf.org>
Subject: Re: [hybi] 64-bit comment
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On Wed, 21 Jul 2010 09:19:38 +0200, Ian Hickson <ian@hixie.ch> wrote: > On Thu, 24 Jun 2010, Erik Möller wrote: >> >> [43. Let expected be the MD5 fingerprint of challenge as a big-endian >> 128 bit >> string. [RFC1321]] >> >> A comment on the 64-bit issue of that code could be helpful I think. If >> you're >> just trying WebSockets on for size and do a simple server you're likely >> just >> going to use the code from rfc1321 to calculate the Md5 and it's pretty >> easy >> to miss the fact that it contains the following definition: >> >> /* UINT4 defines a four byte word */ >> typedef unsigned long int UINT4; >> >> Works fine on 32-bit OS and LLP64 (i.e. Win64) but on any other 64-bit >> OS >> that's going to typedef UINT4 to be 8 bytes which will happily compile >> without >> errors but will produce an incorrect hash. > > I'm very happy to include a note here, what text would you suggest? > Perhaps something like this: "Note that the reference implementation in rfc1321 defines a 4-byte integer as unsigned long int which does not hold true on all 64-bit operating systems." -- Erik Möller Core Developer Opera Software
- [hybi] 64-bit comment Erik Möller
- Re: [hybi] 64-bit comment Ian Hickson
- Re: [hybi] 64-bit comment Erik Möller