We are looking for a PHP version of the google HMAC encrypt method described in this link
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Our supplier deliverd some keys to test the algorytm.
e_key = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
i_key = bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
data = qMgSYozqy_iTLthA_kqjsm_Y7PlGcHiO4UU9aw==
I wrote a piece of code, but i can't find the answer why it is not working. Probably the php base64 encoding algorithm in PHP is not supporting RFC 3548.
When the method is implemented correctly the result has to be a number with decimals. When i execute my method with the above data the output is gibberish.
We’re looking for a work-around.
Hereby our code
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function hmacEncrypt($price, $iv, $e_key, $i_key) {
$pad = substr(hash_hmac('sha1', $iv, $e_key), 0, 8);
$enc_price = $pad ^ $price;
$signature = substr(hash_hmac('sha1', $price . $iv, $i_key), 0, 4);
$final_message = base64_encode($iv . $enc_price . $signature);
return $final_message;
}
function hmacDecrypt($final_message, $e_key, $i_key) {
//$enc_price = base64_decode($final_message);
$enc_price = base64_decode($final_message, 16);
$iv = substr($enc_price, 0, 16);
$signature = substr($enc_price, strlen($enc_price) - 4, 4);
$p = substr($enc_price, 16, 8);
$price_pad = substr(hash_hmac('sha1', $iv, $e_key), 0, 8);
$price = $p ^ $price_pad;
$conf_sig = substr(hash_hmac('sha1', $price . $iv, $i_key), 0, 4);
return $price;
if ($conf_sig === $signature) {
return floatval($price);
}
}
echo hmacDecrypt('qMgSYozqy_iTLthA_kqjsm_Y7PlGcHiO4UU9aw==', 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
Dear Sir,
Thank you for giving me a chance to bid on your project. i am a serious bidder here and i have already worked on a similar project before and can deliver as u have mentioned
I have checked your requirements.i have right skills to work on this assignment
my award = superb result = happy client. In a good partnership, good results happen. Good cooking makes good eating!BWe consider our client as our partner.
can u provide your email or sky-pe etc for further discussion about the project.
I am ready to discuss with you
with best Regards
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