ID: 13206
Updated by: rasmus
Status: Closed
Bug Type: Feature/Change Request
Operating System: Windows 98
PHP Version: 4.0.4pl1
New Comment:

Read RFC1321 ( where this is clearly stated and a 
number of testcases are listed.  PHP's md5() function performs each and every test 
case in the RFC perfectly (from the RFC):

MD5 test suite:
MD5 ("") = d41d8cd98f00b204e9800998ecf8427e
MD5 ("a") = 0cc175b9c0f1b6a831c399e269772661
MD5 ("abc") = 900150983cd24fb0d6963f7d28e17f72
MD5 ("message digest") = f96b697d7cb7938d525a2f31aaf161d0
MD5 ("abcdefghijklmnopqrstuvwxyz") = c3fcd3d76192e4007dfb496cca67e13b
MD5 ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789") =
MD5 ("123456789012345678901234567890123456789012345678901234567890123456
78901234567890") = 57edf4a22be3c955ac49da2e2107b67a

Previous Comments:

[2001-09-07 19:13:27] [EMAIL PROTECTED]

md5() outputs 32 hex characters. 1 hex character = 4 bits.

32 * 4 = 128 bits.

128 bits / 8 = 16 bytes


[2001-09-07 18:32:14] [EMAIL PROTECTED]

It's a feature request regarding the MD5 string function.

The standard MD5 hash algorithm provides a 16 bytes long digest. PHP's MD5, even 
though it says it's "using the RSA Data Security, Inc. MD5 Message-Digest Algorithm", 
is non-standard: gives out a 32 bytes long digest.

I like the MD5 function very much, but I don't like it being described as using MD5 if 
it doesn't act like the standard MD5 algorithm, so my suggestion is that you should at 
least provide an option to choose between "32 bytes digest (non-standard)" and "16 
bytes digest (standard)" modes.

It also would help a lot if source code/reference to PHP's unique MD5 implementation 
(which I can't seem to find ANYWHERE on the net) would be made available.

Thank you in advance,

Dan 'Neurobasher' Gomes


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