PHP MD5实施

Question

I'm currently attempting to code one for part of a college project - binary/hex handling and cryptographic functions are well regarded in the mark scheme, so I thought I'd kill two birds with one stone.

However, the documentation availible on the algorithm itself is thorough but confusing. Is there a prexisting PHP libary/class that I could take a look at, or is there a step by step explanation of the algorithm, and the variables it uses (T and X especially) somewhere?

Thanks

Answer 1

Get hold of a copy of Bruce Schneier's Applied Cryptography . Although the source code is in C, he does provide an excellent background to the design principles and theory behind the algorithm.

Answer 2

Wikipedia has a good write up of the algorithm (along with the valid reasons you should avoid it).

It also contains a full pseudocode example of its implementation.

Answer 3

这是用C语言编写的MD5。考虑到它不是PHP，所以我不知道它是否对您有帮助，但这里是： http : //www.google.com/codesearch/p?hl= zh-CN&sa=N&cd=10&ct =rc ＃zd_oLGoxqmg / md5.c＆q = function％20md5.c％20lang：c