<?php
function hmac_sha1($key,$data) {
$blocksize=64;
$hashfunc='sha1';
if (strlen($key)>$blocksize)
$key=pack('H*', $hashfunc($key));
$key=str_pad($key,$blocksize,chr(0x00));
$ipad=str_repeat(chr(0x36),$blocksize);
$opad=str_repeat(chr(0x5c),$blocksize);
$hmac = pack(
'H*',$hashfunc(
($key^$opad).pack(
'H*',$hashfunc(
($key^$ipad).$data
)
)
)
);
return bin2hex($hmac);
}
$hmac=hmac_sha1('key','The quick brown fox jumps over the lazy dog');
print "= ".$hmac;
}
?>
= de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9