crypt.hash

Computes a cryptographic hash digest of the input data using the specified algorithm. The input is processed through the hash function’s compression rounds and the resulting digest is returned as a hexadecimal string.

Algorithm	Digest Size	Hex Chars	Security
md5	128 bits	32	Broken — collision attacks exist. Integrity checks only
sha1	160 bits	40	Broken. Avoid for security-critical use
sha256	256 bits	64	Strong. SHA-2SHA (hash family)Secure Hash Algorithm family: SHA-1 (160-bit, broken), SHA-256/SHA-384/SHA-512 (SHA-2 family, secure), SHA3-256 (Keccak-based). Used by crypt.hash() to produce fixed-size digests from arbitrary input data. family, Merkle–DamgårdMerkle–DamgårdA construction used by MD5, SHA-1, and SHA-2 family hashes. Processes input in fixed-size blocks through a compression function, chaining intermediate hash values. Vulnerable to length-extension attacks. construction
sha384	384 bits	96	SHA-512 truncated. Extra collision resistance
sha512	512 bits	128	SHA-2 family. 80 rounds of compression
sha3-256	256 bits	64	Keccak spongeKeccak spongeThe permutation-based construction used by SHA-3. "Absorbs" input blocks into a state array, then "squeezes" output. Immune to length-extension attacks unlike Merkle–Damgård hashes. construction (different design than SHA-2)
sha3-512	512 bits	128	Keccak sponge, 1600-bit state

All hash functions are one-way (cannot be reversed) and deterministic (same input always produces same output).