SHA-0¶

Module: Std::Hash::Sha0

160-bit SHA-0 cryptographic hash.

Summary¶

struct Sha0

Sha0.Hash(message: char8[]) -> String

Constants¶

Constant	Value
`BlockSize`	64
`DigestSize`	20

Description¶

SHA-0 is a 160-bit hash function published by NIST in 1993 as the first member of the Secure Hash Algorithm family. It uses a Merkle–Damgård construction processing 512-bit blocks through 80 rounds. SHA-0 is structurally identical to SHA-1 but omits a critical left rotate in the message expansion schedule, making it significantly weaker.

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

Example¶

import Std::Hash::Sha0;

func Main() {
    let digest = Sha0::Hash(c8"abc");
    PrintLine(digest);
    // 0164b8a914cd2a5e74c4f7ff082c4d97f1edf880
}

Test Vectors¶

Input	Expected Digest
`c8""`	`f96cea198ad1dd5617ac084a3d92c6107708c0ef`
`c8"a"`	`37f297772fae4cb1ba39b6cf9cf0381180bd62f2`
`c8"abc"`	`0164b8a914cd2a5e74c4f7ff082c4d97f1edf880`

Safety¶

SHA-0 is cryptographically broken. Collision attacks exist with complexity far below the brute-force threshold. It was withdrawn shortly after publication and replaced by SHA-1 (which itself is now also broken).

Do not use SHA-0 for: - Password hashing - Digital signatures - Certificate verification - Any security-critical integrity check

Use is acceptable for: - Legacy protocol compatibility - Research and educational purposes