HMAC

What it calculates

Computes a keyed message authentication code using a hash function.

Inputs and methods

HEX key, HEX or ASCII data; MD5, SHA-1, SHA-256, SHA-384 or SHA-512.

Worked example

HMAC-SHA-256, key HEX 0B repeated 20 times, ASCII data Hi There.

B0344C61D8DB38535CA8AFCEAF0BF12B881DC200C9833DA726E9376C2E32CFF7

Specification and limits

The output is the full HMAC. Sender and verifier must use the same key, input bytes and hash.