function verify_license($product_code, $name, $copies, $license)
{
$signature = array();
$license = str_replace('9', 'I', $license);
$license = str_replace('8', 'O', $license);
$license = str_replace('-', '', $license);
$compositeLicenseCode = make_license_source($product_code, $name);
// pad out the license key
$padded_length = strlen($license) % 8;
if ($padded_length == 0) {
$padded_length = strlen($license);
} else {
$padded_length = (intval(strlen($license) / 8) + 1) * 8;
}
$padded = $license . str_repeat('=', $padded_length - strlen($license));
$signature = base32_decode($padded, base32_decode_buffer_size(strlen($padded)));
$key = file_get_contents("./lib/dsapub512.pem");
$pukeyid = openssl_get_publickey($key);
$valid = openssl_verify($compositeLicenseCode, $signature, $pukeyid, OPENSSL_ALGO_DSS1);
return $valid == 1;
}
$output[$bytes + 1] = $currentByte << 7;
if ($input[$offset + 5] == '=') {
// print "Return + 5 bytes:$bytes\n";
return arrayToString($output, $bytes + 1);
} else {
$bytes++;
}
$output[$bytes] += decode_bits($input[$offset + 5]) << 2;
$currentByte = decode_bits($input[$offset + 6]);
$output[$bytes] += $currentByte >> 3;
$output[$bytes + 1] = ($currentByte & 0x7) << 5;
if ($input[$offset + 7] == '=') {
// print "Return + 7 bytes:$bytes\n";
return arrayToString($output, $bytes + 1);
} else {
$bytes++;
}
$output[$bytes] += decode_bits($input[$offset + 7]) & 0x1f;
$bytes++;
}
return arrayToString($output, $bytes);
}
$test = false;
if ($test) {
print "buff len " . base32_decode_buffer_size(8) . "\n";
print "buff len " . base32_decode_buffer_size(80) . "\n";
$x = base32_decode('GEZDGNBV', base32_decode_buffer_size(8));
$y = base32_decode('MFRGGZDF', base32_decode_buffer_size(8));
echo "{$x} should be 12345\n";
echo "{$y} should be abcde\n ";
}
