HMAC hashing in Lua. HMAC algorithm per RFC 2104.
To begin add
local hmac = require'hmac'Compute a hmac hash based on a hash function. Any function that takes a string as single argument works, like md5.sum.
hmac.compute(key, message, hash_function, blocksize[, opad][, ipad]) -> hash, opad, ipad
blocksize is that of the underlying hash function, i.e. 64 for MD5 and SHA-256, 128 for SHA-384 and SHA-512.
Returns a HMAC function that can be used with a specific hash function.
hmac.new(hash_function, block_size) -> hmac_function
hmac_function(message, key) -> hash
Compute HMAC-MD5 (requires [md5]).
hmac.md5(message, key) -> HMAC-MD5 hash
Compute HMAC-SHA2 (requires [sha2]).
hmac.sha256(message, key) -> HMAC-SHA256 hash
hmac.sha384(message, key) -> HMAC-SHA384 hash
hmac.sha512(message, key) -> HMAC-SHA512 hash