MD5¶

Module: Std::Hash::Md5

128-bit MD5 cryptographic hash.

Summary¶

struct Md5

Md5.Hash(message: char8[]) -> String

Constants¶

Constant	Value
`BlockSize`	64
`DigestSize`	16

Description¶

MD5 is a 128-bit hash function designed by Ronald Rivest in 1991. It uses a Merkle–Damgård construction with a Davies–Meyer compression function, processing 512-bit message blocks through 64 rounds of bitwise operations, modular addition, and non-linear functions (F, G, H, I).

The Hash method takes a char8[] and returns a hex-encoded digest string.

Example¶

import Std::Hash::Md5;

func Main() {
    let digest = Md5::Hash(c8"abc");
    PrintLine(digest);
    // 900150983cd24fb0d6963f7d28e17f72
}

Test Vectors¶

Input	Expected Digest
`c8""`	`d41d8cd98f00b204e9800998ecf8427e`
`c8"abc"`	`900150983cd24fb0d6963f7d28e17f72`
`c8"message digest"`	`f96b697d7cb7938d525a2f31aaf161d0`
`c8"Hello, World!"`	`65a8e27d8879283831b664bd8b7f0ad4`

Safety¶

MD5 is cryptographically broken and unsuitable for security purposes. Collision attacks are trivial — a single collision can be generated in under a second on modern hardware.

Do not use MD5 for: - Password hashing - Digital signatures - Certificate verification - Any security-critical integrity check

Use is acceptable for: - Non-cryptographic checksums - Legacy protocol compatibility - Hash table keys (where collisions are tolerable)