57 lines
1.6 KiB
PHP
57 lines
1.6 KiB
PHP
function validate($address){
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$decoded = decodeBase58($address);
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$d1 = hash("sha256", substr($decoded,0,21), true);
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$d2 = hash("sha256", $d1, true);
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if(substr_compare($decoded, $d2, 21, 4)){
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throw new \Exception("bad digest");
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}
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return true;
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}
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function decodeBase58($input) {
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$alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
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$out = array_fill(0, 25, 0);
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for($i=0;$i<strlen($input);$i++){
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if(($p=strpos($alphabet, $input[$i]))===false){
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throw new \Exception("invalid character found");
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}
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$c = $p;
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for ($j = 25; $j--; ) {
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$c += (int)(58 * $out[$j]);
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$out[$j] = (int)($c % 256);
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$c /= 256;
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$c = (int)$c;
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}
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if($c != 0){
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throw new \Exception("address too long");
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}
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}
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$result = "";
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foreach($out as $val){
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$result .= chr($val);
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}
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return $result;
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}
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function main () {
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$s = array(
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"1Q1pE5vPGEEMqRcVRMbtBK842Y6Pzo6nK9",
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"1AGNa15ZQXAZUgFiqJ2i7Z2DPU2J6hW62i",
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"1Q1pE5vPGEEMqRcVRMbtBK842Y6Pzo6nJ9",
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"1AGNa15ZQXAZUgFiqJ2i7Z2DPU2J6hW62I",
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);
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foreach($s as $btc){
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$message = "OK";
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try{
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validate($btc);
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}catch(\Exception $e){ $message = $e->getMessage(); }
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echo "$btc: $message\n";
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}
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}
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main();
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