Function hmac_sha256 

pub fn hmac_sha256(key: &[u8], message: &[u8]) -> [u8; 32]

Computes HMAC-SHA256 over a message with a key of any length.

Arguments

• key - the secret key; any length is accepted, as HMAC defines.
• message - the bytes to authenticate.

Returns

The 32-byte message authentication code.

Examples

// RFC 4231 test case 2.
let mac = pamoja_session::hmac_sha256(b"Jefe", b"what do ya want for nothing?");
assert_eq!(mac[..4], [0x5b, 0xdc, 0xc1, 0x46]);