/**
* @brief 使用HMAC-SHA1算法生成oauth_signature签名值
*
* @param $key 密钥
* @param $str 源串
*
* @return 签名值
*/
1 function getSignature($str, $key) {
2 $signature = "";
3 if (function_exists('hash_hmac')) {
4 $signature = bin2hex(hash_hmac("sha1", $str, $key, true));
5 } else {
6 $blocksize = 64;
7 $hashfunc = 'sha1';
8 if (strlen($key) > $blocksize) {
9 $key = pack('H*', $hashfunc($key));
10 }
11 $key = str_pad($key, $blocksize, chr(0x00));
12 $ipad = str_repeat(chr(0x36), $blocksize);
13 $opad = str_repeat(chr(0x5c), $blocksize);
14 $hmac = pack(
15 'H*', $hashfunc(
16 ($key ^ $opad) . pack(
17 'H*', $hashfunc(
18 ($key ^ $ipad) . $str
19 )
20 )
21 )
22 );
23 $signature = bin2hex($hmac);
24 }
25 return $signature;
26 }
