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Compute HMAC-SHA256 hash (string.hmac_sha256)

Declaration​

hex_hash = string.hmac_sha256(data, key)

Parameters​

  • data
    string. Input data to hash.
  • key
    string. Secret key used by the HMAC algorithm.

Returns​

  • hex_hash
    string. Lowercase hex text of the HMAC-SHA256 digest.

Description​

Use the HMAC-SHA256 algorithm to compute a keyed hash for any string (or binary data).

Example​

local signature = string.hmac_sha256('hello world', 'secret')
sys.alert(signature) -- prints "734cc62f32841568f45715aeb9f4d7891324e6d948e4c6c60c0621cdac48623a"

Note: Uses function outside of this chapter: sys.alert