@crypto

Import this module with import @crypto.

Function	Signature	Description
sha256	(data string) -> string	SHA-256 hash (hex)
sha1	(data string) -> string	SHA-1 hash (hex). Broken for collision resistance; ships for HMAC-SHA1 / TOTP
sha512	(data string) -> string	SHA-512 hash (hex)
md5	(data string) -> string	MD5 hash (hex)
hmac_sha256	(key string, data string) -> string	RFC 2104 HMAC-SHA-256 (hex)
hmac_sha1	(key string, data string) -> string	RFC 2104 HMAC-SHA-1 (hex)
constant_time_equal	(a string, b string) -> bool	Compare without an early return on mismatch; a length difference is folded into the result
crc32	(data string) -> u64	IEEE CRC-32 checksum (polynomial 0xEDB88320). A checksum, not a cryptographic hash
entropy	(data string) -> f64	Shannon entropy of data in bits per byte (0.0–8.0); "" returns 0.0
totp	(secret string, timestamp i64, digits i64) -> string	RFC 6238 TOTP over the raw secret bytes (SHA-1, 30 s step), zero-padded to digits; panics (P0126) if digits is outside 1–9
random_hex	(length i64) -> string	Cryptographically secure random hex string