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viz_keys.php
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viz_keys.php
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<?php
if(!function_exists('base58_encode')){
// Base58 encoding/decoding functions - all credits go to https://github.com/stephen-hill/base58php
function base58_encode($string){
$alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
$base = strlen($alphabet);
// Type validation
if (is_string($string) === false) {
return false;
}
// If the string is empty, then the encoded string is obviously empty
if (strlen($string) === 0) {
return '';
}
// Now we need to convert the byte array into an arbitrary-precision decimal
// We basically do this by performing a base256 to base10 conversion
$hex = unpack('H*', $string);
$hex = reset($hex);
$decimal = gmp_init($hex, 16);
// This loop now performs base 10 to base 58 conversion
// The remainder or modulo on each loop becomes a base 58 character
$output = '';
while (gmp_cmp($decimal, $base) >= 0) {
list($decimal, $mod) = gmp_div_qr($decimal, $base);
$output .= $alphabet[gmp_intval($mod)];
}
// If there's still a remainder, append it
if (gmp_cmp($decimal, 0) > 0) {
$output .= $alphabet[gmp_intval($decimal)];
}
// Now we need to reverse the encoded data
$output = strrev($output);
// Now we need to add leading zeros
$bytes = str_split($string);
foreach ($bytes as $byte) {
if ($byte === "\x00") {
$output = $alphabet[0].$output;
continue;
}
break;
}
return (string)$output;
}
}
if(!function_exists('base58_decode')){
function base58_decode($base58){
$alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
$base = strlen($alphabet);
// Type Validation
if (is_string($base58) === false) {
return false;
}
// If the string is empty, then the decoded string is obviously empty
if (strlen($base58) === 0) {
return '';
}
$indexes = array_flip(str_split($alphabet));
$chars = str_split($base58);
// Check for invalid characters in the supplied base58 string
foreach ($chars as $char) {
if (isset($indexes[$char]) === false) {
return false;
}
}
// Convert from base58 to base10
$decimal = gmp_init($indexes[$chars[0]], 10);
for ($i = 1, $l = count($chars); $i < $l; $i++) {
$decimal = gmp_mul($decimal, $base);
$decimal = gmp_add($decimal, $indexes[$chars[$i]]);
}
// Convert from base10 to base256 (8-bit byte array)
$output = '';
while (gmp_cmp($decimal, 0) > 0) {
list($decimal, $byte) = gmp_div_qr($decimal, 256);
$output = pack('C', gmp_intval($byte)).$output;
}
// Now we need to add leading zeros
foreach ($chars as $char) {
if ($indexes[$char] === 0) {
$output = "\x00".$output;
continue;
}
break;
}
return $output;
}
}
if(!function_exists('ec_check_der')){
function ec_check_der($data){
return '30440220'==substr($data,0,8) && '0220'==substr($data,72,4);
}
}
if(!function_exists('ec_compact2der')){
function ec_compact2der($data){
$x=substr($data,2,64);
$y=substr($data,66,64);
return '30440220'.$x.'0220'.$y;
}
}
if(!function_exists('ec_der2compact')){
function ec_der2compact($data){
$x=substr($data,8,64);
$y=substr($data,-64);
return '1f'.$x.$y;
}
}
class viz_keys{
public $bin='';
public $hex='';
function viz_keys($data=''){
if($data){
if(preg_match('/^[0-9a-f]+$/i',$data)){
$this->import_hex($data);
}
else{
$this->import_bin($data);
}
}
}
function random_str($length,$keyspace='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ:#@^&*()!?.,;"[]{}'){
$pieces=[];
$max=mb_strlen($keyspace,'8bit')-1;
for($i=0;$i<$length;++$i){
$pieces[]=$keyspace[random_int(0,$max)];
}
return implode('',$pieces);
}
function gen($seed='',$salt=''){
if(!$salt){
$salt=$this->random_str(40);
}
$seed=$salt.$seed;
$hex_key=hash('sha256',$seed);
$this->import_hex($hex_key);
}
function gen_pair($seed='',$salt=''){
if(!$salt){
$salt=$this->random_str(40);
}
$seed=$salt.$seed;
$hex_key=hash('sha256',$seed);
$this->import_hex($hex_key);
$wif=$this->wif();
$this->to_public();
$pub=$this->public_key();
return [$wif,$pub];
}
function import_hex($hex){
$this->bin=hex2bin($hex);
$this->hex=$hex;
}
function import_bin($bin){
$this->bin=$bin;
$this->hex=bin2hex($bin);
}
function import_wif($wif){
$wif_decoded=base58_decode($wif);
$wif_checksum=substr($wif_decoded,-4);
$wif_decoded_clear=substr($wif_decoded,0,-4);
$checksum=hash('sha256',$wif_decoded_clear);
$checksum=hash('sha256',hex2bin($checksum));
$checksum=substr($checksum,0,8);
if($checksum!=bin2hex($wif_checksum)){
return false;
}
$check_version=substr($wif_decoded_clear,0,1);
if('80'!=bin2hex($check_version)){
return false;
}
$wif_decoded_clear=substr($wif_decoded_clear,1);
$this->bin=$wif_decoded_clear;
$this->hex=bin2hex($wif_decoded_clear);
return true;
}
function import_public($key){
$clear_key=substr($key,3);
$key_decoded=base58_decode($clear_key);
$key_checksum=substr($key_decoded,-4);
$key_decoded_clear=substr($key_decoded,0,-4);
$checksum=hash('ripemd160',$key_decoded_clear);
$checksum=substr($checksum,0,8);
if($checksum!=bin2hex($key_checksum)){
return false;
}
$this->bin=$key_decoded_clear;
$this->hex=bin2hex($key_decoded_clear);
return true;
}
function to_public(){
if(!function_exists('secp256k1_context_create')){
return false;
}
$context=secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
$public_key=null;
$result=secp256k1_ec_pubkey_create($context, $public_key, $this->bin);
if(1 === $result){
$serialize_flags=SECP256K1_EC_COMPRESSED;
$serialized='';
if (1 !== secp256k1_ec_pubkey_serialize($context, $serialized, $public_key, $serialize_flags)) {
return false;
}
$this->bin=$serialized;
$this->hex=bin2hex($serialized);
return true;
}
else{
return false;
}
}
function wif(){
$key='80'.$this->hex;
$checksum=hash('sha256',hex2bin($key));
$checksum=hash('sha256',hex2bin($checksum));
$key=$key.substr($checksum,0,8);
return base58_encode(hex2bin($key));
}
function public_key($prefix='VIZ'){
$key=$this->hex;
$checksum=hash('ripemd160',hex2bin($key));
$key=$key.substr($checksum,0,8);
return $prefix.base58_encode(hex2bin($key));
}
function sign($data){
if(!function_exists('secp256k1_context_create')){
return false;
}
$context=secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
$data_hash=hash('sha256',$data,true);
$signature=null;
if (1 !== secp256k1_ecdsa_sign($context,$signature,$data_hash,$this->bin)) {
return false;
}
$serialized='';
secp256k1_ecdsa_signature_serialize_der($context,$serialized,$signature);
return bin2hex($serialized);
}
function sign_compact($data){
if(!function_exists('secp256k1_context_create')){
return false;
}
$context=secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
$data_hash=hash('sha256',$data,true);
$signature=null;
if (1 !== secp256k1_ecdsa_sign($context,$signature,$data_hash,$this->bin)) {
return false;
}
$serialized='';
if(!function_exists('secp256k1_ecdsa_signature_serialize_compact')){
return false;
}
secp256k1_ecdsa_signature_serialize_compact($context,$serialized,$signature);
return dechex(4+27).bin2hex($serialized);
}
function sign_recoverable_compact($data){
if(!function_exists('secp256k1_context_create')){
return false;
}
$context=secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
$data_hash=hash('sha256',$data,true);
$signature_recoverable = null;
if(!function_exists('secp256k1_ecdsa_sign_recoverable')){
return false;
}
if(1 !== secp256k1_ecdsa_sign_recoverable($context,$signature_recoverable,$data_hash,$this->bin)){
return false;
}
$serialized='';
if(!function_exists('secp256k1_ecdsa_recoverable_signature_serialize_compact')){
return false;
}
$recid=0;
secp256k1_ecdsa_recoverable_signature_serialize_compact($context,$serialized,$recid,$signature_recoverable);
return dechex($recid+4+27).bin2hex($serialized);
}
function verify($data,$signature){
if(!function_exists('secp256k1_context_create')){
return false;
}
$context=secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
$public_key_point=null;
if(1 !== secp256k1_ec_pubkey_parse($context,$public_key_point,$this->bin)){
return false;
}
$signature_bin=hex2bin($signature);
$signature_point=null;
if(1 !== secp256k1_ecdsa_signature_parse_der($context,$signature_point,$signature_bin)){
return false;
}
$data_hash=hash('sha256',$data,true);
if(1 == secp256k1_ecdsa_verify($context,$signature_point,$data_hash,$public_key_point)){
return true;
}
return false;
}
function verify_compact($data,$signature){
if(!function_exists('secp256k1_context_create')){
return false;
}
$context=secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
$signature_bin=hex2bin($signature);
$signature_point=null;
$recid=substr($signature_bin,0,1);
$recid=bin2hex($recid);
$recid=hexdec($recid);
$recid-=4;
$recid-=27;
$signature_bin=substr($signature_bin,1);
if(1 !== secp256k1_ecdsa_recoverable_signature_parse_compact($context,$signature_point,$signature_bin,$recid)){
return false;
}
$data_hash=hash('sha256',$data,true);
$recovered_public_key_point=null;
if(1 !== secp256k1_ecdsa_recover($context,$recovered_public_key_point,$signature_point,$data_hash)){
return false;
}
$serialized = '';
if (1 !== secp256k1_ec_pubkey_serialize($context,$serialized,$recovered_public_key_point,SECP256K1_EC_COMPRESSED)) {
return false;
}
if($this->bin == $serialized){//public key equal recovered
return true;
}
return false;
}
}
/*
Example:
$key=new viz_keys('b9f3c242e5872ac828cf2ef411f4c7b2a710bd9643544d735cc115ee939b3aae');
print $key->hex.PHP_EOL;
print 'WIF from hex: '.$key->wif().PHP_EOL;
$signature=$key->sign('Hello VIZ.World!');
print $signature.PHP_EOL;
if($key->to_public()){
print 'Public key: '.$key->public_key().PHP_EOL;
print 'Verify signature status: '.$key->verify('Bye VIZ.World!',$signature).PHP_EOL;
print 'Verify signature status: '.$key->verify('Hello VIZ.World!',$signature).PHP_EOL;
}
*/