public static function base58_encode($num)
{
self::debug('base58_encode: num: ' . $num);
return bcmath_Utils::dec2base($num, 58, '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz');
}
function BWWC__MATH_generate_bitcoin_address_from_mpk($master_public_key, $key_index)
{
if (USE_EXT != 'GMP' && USE_EXT != 'BCMATH') {
return false;
}
/*
if (USE_EXT == 'GMP')
{
$utils_class = 'gmp_Utils';
$fn_bchexdec = 'gmp_hexdec';
$fn_dec2base = 'gmp_dec2base';
$fn_base2dec = 'gmp_base2dec';
}
else if (USE_EXT == 'BCMATH')
{
$utils_class = 'bcmath_Utils';
$fn_bchexdec = 'bchexdec';
$fn_dec2base = 'dec2base';
$fn_base2dec = 'base2dec';
}
else
return false;
*/
// create the ecc curve
if (USE_EXT == 'GMP') {
// GMP
$_p = gmp_Utils::gmp_hexdec('0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F');
$_r = gmp_Utils::gmp_hexdec('0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141');
$_b = gmp_Utils::gmp_hexdec('0x0000000000000000000000000000000000000000000000000000000000000007');
$_Gx = gmp_Utils::gmp_hexdec('0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798');
$_Gy = gmp_Utils::gmp_hexdec('0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8');
} else {
// BCMATH
$_p = bcmath_Utils::bchexdec('0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F');
$_r = bcmath_Utils::bchexdec('0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141');
$_b = bcmath_Utils::bchexdec('0x0000000000000000000000000000000000000000000000000000000000000007');
$_Gx = bcmath_Utils::bchexdec('0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798');
$_Gy = bcmath_Utils::bchexdec('0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8');
}
$curve = new CurveFp($_p, 0, $_b);
$gen = new Point($curve, $_Gx, $_Gy, $_r);
// prepare the input values
if (USE_EXT == 'GMP') {
// GMP
$x = gmp_Utils::gmp_hexdec('0x' . substr($master_public_key, 0, 64));
$y = gmp_Utils::gmp_hexdec('0x' . substr($master_public_key, 64, 64));
$z = gmp_Utils::gmp_hexdec('0x' . hash('sha256', hash('sha256', $key_index . ':0:' . pack('H*', $master_public_key), TRUE)));
} else {
// BCMATH
$x = bcmath_Utils::bchexdec('0x' . substr($master_public_key, 0, 64));
$y = bcmath_Utils::bchexdec('0x' . substr($master_public_key, 64, 64));
$z = bcmath_Utils::bchexdec('0x' . hash('sha256', hash('sha256', $key_index . ':0:' . pack('H*', $master_public_key), TRUE)));
}
// generate the new public key based off master and sequence points
$pt = Point::add(new Point($curve, $x, $y), Point::mul($z, $gen));
if (USE_EXT == 'GMP') {
// GMP
$keystr = "" . str_pad(gmp_Utils::gmp_dec2base($pt->getX(), 256), 32, "", STR_PAD_LEFT) . str_pad(gmp_Utils::gmp_dec2base($pt->getY(), 256), 32, "", STR_PAD_LEFT);
} else {
// BCMATH
$keystr = "" . str_pad(bcmath_Utils::dec2base($pt->getX(), 256), 32, "", STR_PAD_LEFT) . str_pad(bcmath_Utils::dec2base($pt->getY(), 256), 32, "", STR_PAD_LEFT);
}
$vh160 = "" . hash('ripemd160', hash('sha256', $keystr, TRUE), TRUE);
$addr = $vh160 . substr(hash('sha256', hash('sha256', $vh160, TRUE), TRUE), 0, 4);
// base58 conversion
$alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
$encoded = '';
if (USE_EXT == 'GMP') {
// GMP
$num = gmp_Utils::gmp_base2dec($addr, 256);
} else {
// BCMATH
$num = bcmath_Utils::base2dec($addr, 256);
}
while (intval($num) >= 58) {
$div = bcdiv($num, '58');
$mod = bcmod($num, '58');
$encoded = $alphabet[intval($mod)] . $encoded;
$num = $div;
}
$encoded = $alphabet[intval($num)] . $encoded;
$pad = '';
$n = 0;
while ($addr[$n++] == "") {
$pad .= '1';
}
return $pad . $encoded;
}
