crypt.hash

Hashes a string with the named algorithm and returns the digest as a hex string.

crypt.hash(data: string, algorithm: string): string

Accepted algorithms:

• "md5" - 32-character digest
• "sha1" - 40-character digest
• "sha256" - 64-character digest
• "sha384" - 96-character digest
• "sha512" - 128-character digest
• "sha3-256" - 64-character digest
• "sha3-512" - 128-character digest

Most commonly used to compare two large strings fastly - hash both and compare them, instead of running a byte-by-byte equality.

Parameters

Parameter	Type	Description
data	string	The content to hash.
algorithm	string	One of the algorithm names listed above. Case-sensitive.

Returns

string - the hex digest. Length depends on the algorithm (see list above).

Example

Detect whether an upstream file has changed since you last cached it.

Example 1

<<<<<<< HEAD
local hash = crypt.hash("Hello, world!", "test")
=======
-- crypt.hash(data: string, algorithm: string): string
>>>>>>> 50e30f53759b0538759af25c9b271514aa2c9290

Commonly supported algorithms include 'sha1', 'sha256', 'sha512', 'md5'.