Re: Exchanging md5s between Perl and C

[jettero]

in reply to Exchanging md5s between Perl and C

It seems to me it's your line endings...

echo -n "a" | md5sum gives me the same thing as md5_hex("a"). "a\n" and "a" should not hash to the same thing.

• "a" should be: 0cc175b9c0f1b6a831c399e269772661
• "a\x0a" should be: 60b725f10c9c85c70d97880dfe8191b3
• "a\x0d\x0a" should be: 0c629e1d3acda389c88a213374ec62fc

It's also worth noting that Digest::MD5 really is C, as much as /usr/bin/md5sum is: MD5.xs.

[bart]

I'm pretty sure that is indeed the cause. Here's a test using md5sum from Perl:

open OUT, '>', 'tempfile';
print OUT 'a';
close OUT;
system('md5sum', '-b', 'tempfile');

Result:

0cc175b9c0f1b6a831c399e269772661 *tempfile

So yeah, md5sum and Digest::MD5 agree.

It's the OP's other tests that were flawed.

[damian45]

ahhk! thank you very much, yes that was it.

I previously had an issue with 32/64 bit and after going round and round until fixed, somewhere along the line I stared chasing my tail overlooking that minor but oh so important detail.

cheers for you time! Glad it was as simple as that