Function hmac_sha1 

pub fn hmac_sha1(key: &[u8], source: &[&[u8]]) -> [u8; 20]

HMAC SHA1 digest.

Test

use turn_server::codec::crypto::hmac_sha1;

let buffer = [
    0x00u8, 0x03, 0x00, 0x50, 0x21, 0x12, 0xa4, 0x42, 0x64, 0x4f, 0x5a,
    0x78, 0x6a, 0x56, 0x33, 0x62, 0x4b, 0x52, 0x33, 0x31, 0x00, 0x19, 0x00,
    0x04, 0x11, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00, 0x05, 0x70, 0x61, 0x6e,
    0x64, 0x61, 0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x09, 0x72, 0x61, 0x73,
    0x70, 0x62, 0x65, 0x72, 0x72, 0x79, 0x00, 0x00, 0x00, 0x00, 0x15, 0x00,
    0x10, 0x31, 0x63, 0x31, 0x33, 0x64, 0x32, 0x62, 0x32, 0x34, 0x35, 0x62,
    0x33, 0x61, 0x37, 0x33, 0x34,
];

let key = [
    0x3eu8, 0x2f, 0x79, 0x1e, 0x1f, 0x14, 0xd1, 0x73, 0xfc, 0x91, 0xff,
    0x2f, 0x59, 0xb5, 0x0f, 0xd1,
];

let sign = [
    0xd6u8, 0x78, 0x26, 0x99, 0x0e, 0x15, 0x56, 0x15, 0xe5, 0xf4, 0x24,
    0x74, 0xe2, 0x3c, 0x26, 0xc5, 0xb1, 0x03, 0xb2, 0x6d,
];

let hmac_output = hmac_sha1(&key, &[&buffer]);

assert_eq!(&hmac_output, &sign);