本文整理汇总了PHP中gmp_sub函数的典型用法代码示例。如果您正苦于以下问题：PHP gmp_sub函数的具体用法？PHP gmp_sub怎么用？PHP gmp_sub使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了gmp_sub函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的PHP代码示例。
示例1: to32Bit
/**
* Conver 64-bit SteamID to 32-bit SteamID
*
* @param string|int $userId
*
* @return string
* @throws Exception
*/
public static function to32Bit($userId)
{
if (!function_exists('gmp_add')) {
throw new Exception("GMP Library not installed. Cannot convert SteamIDs.");
}
return gmp_strval(gmp_sub($userId, gmp_mul(bindec(self::STEAM_ID_UPPER_BITS), "4294967296")));
}示例2: __construct
/**
* Constructor
*
* @param number $flags Flags
* @param int $width The number of flags. If width is larger than number of
* bits in $flags, zeroes are prepended to flag field.
*/
public function __construct($flags, $width)
{
if (!$width) {
$this->_flags = "";
} else {
// calculate number of unused bits in last octet
$last_octet_bits = $width % 8;
$unused_bits = $last_octet_bits ? 8 - $last_octet_bits : 0;
$num = gmp_init($flags);
// mask bits outside bitfield width
$mask = gmp_sub(gmp_init(1) << $width, 1);
$num &= $mask;
// shift towards MSB if needed
$data = gmp_export($num << $unused_bits, 1, GMP_MSW_FIRST | GMP_BIG_ENDIAN);
$octets = unpack("C*", $data);
$bits = count($octets) * 8;
// pad with zeroes
while ($bits < $width) {
array_unshift($octets, 0);
$bits += 8;
}
$this->_flags = pack("C*", ...$octets);
}
$this->_width = $width;
}示例3: GetAuthID
function GetAuthID($i64friendID)
{
$tmpfriendID = $i64friendID;
$iServer = "1";
if (extension_loaded('bcmath') == 1) {
//decode communityid with bcmath
if (bcmod($i64friendID, "2") == "0") {
$iServer = "0";
}
$tmpfriendID = bcsub($tmpfriendID, $iServer);
if (bccomp("76561197960265728", $tmpfriendID) == -1) {
$tmpfriendID = bcsub($tmpfriendID, "76561197960265728");
}
$tmpfriendID = bcdiv($tmpfriendID, "2");
return "STEAM_0:" . $iServer . ":" . $tmpfriendID;
} else {
if (extension_loaded('gmp') == 1) {
//decode communityid with gmp
if (gmp_mod($i64friendID, "2") == "0") {
$iServer = "0";
}
$tmpfriendID = gmp_sub($tmpfriendID, $iServer);
if (gmp_cmp("76561197960265728", $tmpfriendID) == -1) {
$tmpfriendID = gmp_sub($tmpfriendID, "76561197960265728");
}
$tmpfriendID = gmp_div($tmpfriendID, "2");
return "STEAM_0:" . $iServer . ":" . gmp_strval($tmpfriendID);
}
}
return false;
}示例4: sumT
function sumT($n)
{
if (gmp_intval($n) == 1) {
return gmp_init(1);
}
return gmp_add(gmp_sub(gmp_pow($n, 2), gmp_pow(gmp_init(gmp_intval($n) - 1), 2)), sumT(gmp_init(gmp_intval($n) - 1)));
//return gmp_mod(gmp_add(gmp_sub(gmp_mod(gmp_pow($n, 2), '1000000007'), gmp_mod(gmp_pow(gmp_init(gmp_intval($n)-1), 2), '1000000007')), sumT(gmp_init(gmp_intval($n)-1))), '1000000007');
}示例5: edwards
public function edwards($P, $Q)
{
$x1 = $P[0];
$y1 = $P[1];
$x2 = $Q[0];
$y2 = $Q[1];
$t = gmp_mul($this->params['d'], gmp_mul(gmp_mul($x1, $x2), gmp_mul($y1, $y2)));
$x3 = gmp_mul(gmp_add(gmp_mul($x1, $y2), gmp_mul($x2, $y1)), $this->inv(gmp_add(1, $t)));
$y3 = gmp_mul(gmp_add(gmp_mul($y1, $y2), gmp_mul($x1, $x2)), $this->inv(gmp_sub(1, $t)));
return array(gmp_mod($x3, $this->params['q']), gmp_mod($y3, $this->params['q']));
}示例6: getDelta
/**
* Return delta to last IP address
*
* @return IPv6
*/
public function getDelta()
{
if ($this->delta === null) {
if ($this->prefix == 0) {
$this->delta = new $this->ip_class(constant("{$this->ip_class}::MAX_INT"));
} else {
$this->delta = new $this->ip_class(gmp_sub(gmp_shiftl(1, constant("{$this->ip_class}::NB_BITS") - $this->prefix), 1));
}
}
return $this->delta;
}示例7: computeBaseNDigits
private function computeBaseNDigits($number, $targetBase)
{
$digits = array();
$length = $this->computeBaseNLength($number, $targetBase);
for ($i = 0; $i < $length; $i++) {
$pow = gmp_pow($targetBase, $length - $i - 1);
$div = gmp_div($number, $pow, GMP_ROUND_ZERO);
$number = gmp_sub($number, gmp_mul($div, $pow));
$digits[] = $div;
}
return array_map('gmp_strval', $digits);
}示例8: verifies
public function verifies($hash, Signature $signature)
{
if (extension_loaded('gmp') && USE_EXT == 'GMP') {
$G = $this->generator;
$n = $this->generator->getOrder();
$point = $this->point;
$r = $signature->getR();
$s = $signature->getS();
if (gmp_cmp($r, 1) < 0 || gmp_cmp($r, gmp_sub($n, 1)) > 0) {
return false;
}
if (gmp_cmp($s, 1) < 0 || gmp_cmp($s, gmp_sub($n, 1)) > 0) {
return false;
}
$c = NumberTheory::inverse_mod($s, $n);
$u1 = gmp_Utils::gmp_mod2(gmp_mul($hash, $c), $n);
$u2 = gmp_Utils::gmp_mod2(gmp_mul($r, $c), $n);
$xy = Point::add(Point::mul($u1, $G), Point::mul($u2, $point));
$v = gmp_Utils::gmp_mod2($xy->getX(), $n);
if (gmp_cmp($v, $r) == 0) {
return true;
} else {
return false;
}
} else {
if (extension_loaded('bcmath') && USE_EXT == 'BCMATH') {
$G = $this->generator;
$n = $this->generator->getOrder();
$point = $this->point;
$r = $signature->getR();
$s = $signature->getS();
if (bccomp($r, 1) == -1 || bccomp($r, bcsub($n, 1)) == 1) {
return false;
}
if (bccomp($s, 1) == -1 || bccomp($s, bcsub($n, 1)) == 1) {
return false;
}
$c = NumberTheory::inverse_mod($s, $n);
$u1 = bcmod(bcmul($hash, $c), $n);
$u2 = bcmod(bcmul($r, $c), $n);
$xy = Point::add(Point::mul($u1, $G), Point::mul($u2, $point));
$v = bcmod($xy->getX(), $n);
if (bccomp($v, $r) == 0) {
return true;
} else {
return false;
}
} else {
throw new ErrorException("Please install BCMATH or GMP");
}
}
}示例9: kirim_chat
public function kirim_chat()
{
$this->load->view("fungsiRSA");
/*
-- keterangan Masing Masing Fungsi yang dipake dari Library gmp --
gmp_div_qr = Bagi;
gmp_add = Tambah;
gmp_mul = Kali;
gmp_sub = Kurang;
gmp_gcd = Menghitung Nilai phi;
gmp_strval = Convert Nomer ke String;
*/
// Inisialisasi P = 113 & Q = 157 (Masing Masing adalah Bilangan Prima) <--- Lebih Besar Lebih Bagus
// Menghitung N = P*Q
$n = gmp_mul(113, 157);
$valn = gmp_strval($n);
// Menghitung Nilai M =(p-1)*(q-1)
$m = gmp_mul(gmp_sub(113, 1), gmp_sub(157, 1));
// Mencari E (Kunci Public --> (e,n))
// Inisialisasi E = 5
// Membuktikan E = FPB (Faktor Persekutuan Terbesar) dari E dan M = 1
for ($e = 5; $e < 1000; $e++) {
// Mencoba dengan Perulangan 1000 Kali
$fpb = gmp_gcd($e, $m);
if (gmp_strval($fpb) == '1') {
// Jika Benar E adalah FPB dari E dan M = 1 <-- Hentikan Proses
break;
}
}
// Menghitung D (Kunci Private --> (d,n))
// D = (($m * $i) + 1) / e = $key[1] <-- Perulangan Do While
$i = 1;
do {
$key = gmp_div_qr(gmp_add(gmp_mul($m, $i), 1), $e);
$i++;
if ($i == 1000) {
// Dengan Perulangan 1000 Kali
break;
}
} while (gmp_strval($key[1]) != '0');
// Hasil D = $key[0]
$d = $key[0];
$vald = gmp_strval($d);
$user = $this->input->post("user");
$pesan = $this->input->post("pesan");
$userid = $this->input->post("iduser");
$hasilenkripsi = enkripsi($pesan, $n, $e);
$insert = "insert into chat (user,pesan,id_user) VALUES ('{$user}','{$hasilenkripsi}','{$userid}')";
$this->db->query($insert);
redirect("home/ambil_pesan");
}示例10: contains
public function contains($x, $y)
{
$eq_zero = null;
if (extension_loaded('gmp') && USE_EXT == 'GMP') {
$eq_zero = gmp_cmp(gmp_Utils::gmp_mod2(gmp_sub(gmp_pow($y, 2), gmp_add(gmp_add(gmp_pow($x, 3), gmp_mul($this->a, $x)), $this->b)), $this->prime), 0);
if ($eq_zero == 0) {
return true;
} else {
return false;
}
} else {
throw new ErrorException("Please install GMP");
}
}示例11: sub
public static function sub($x, $y)
{
switch (self::getMode()) {
case self::modeGmp:
return gmp_strval(gmp_sub($x, $y));
break;
case self::modeBcmath:
return bcsub($x, $y);
break;
case self::modeNative:
return $x - $y;
break;
}
}示例12: GOST_verifies
public function GOST_verifies($hash, Signature $signature)
{
if (extension_loaded('gmp') && USE_EXT == 'GMP') {
$G = $this->generator;
//P
$n = $this->generator->getOrder();
//q
$point = $this->point;
//Q
$r = $signature->getR();
$s = $signature->getS();
if (gmp_cmp($r, 1) < 0 || gmp_cmp($r, gmp_sub($n, 1)) > 0) {
return false;
}
if (gmp_cmp($s, 1) < 0 || gmp_cmp($s, gmp_sub($n, 1)) > 0) {
return false;
}
//step 3 GOST
$e = gmp_Utils::gmp_mod2($hash, $n);
if (gmp_cmp($e, '0') === 0) {
$e = gmp_init('1');
}
// step 4 GOST
$v = gmp_strval(gmp_invert($e, $n));
// step 5 GOST
$z1 = gmp_Utils::gmp_mod2(gmp_mul($s, $v), $n);
$z2 = gmp_Utils::gmp_mod2(gmp_mul(gmp_neg($r), $v), $n);
// step 6 GOST
$C = Point::add(Point::mul($z1, $G), Point::mul($z2, $point));
$R = gmp_Utils::gmp_mod2($C->getX(), $n);
if (0) {
echo "n - " . $n . "\n";
echo "h - " . $hash . "\n";
echo "e - " . gmp_Utils::gmp_dechex($e) . "\n";
echo "v - " . gmp_Utils::gmp_dechex($v) . "\n";
echo "r - " . $r . "\n";
echo "s - " . $s . "\n";
echo "z1 - " . gmp_Utils::gmp_dechex($z1) . "\nz2 - " . gmp_Utils::gmp_dechex($z2) . "\n";
echo "Q - " . $point . "\nG - " . $G . "\n";
echo "C - " . $C . "\nR - " . $R . "\n";
}
if (gmp_cmp($R, $r) == 0) {
return true;
} else {
return false;
}
} else {
throw new ErrorException("Please install GMP");
}
}示例13: __construct
public function __construct(\Cachet\Cache $cache, \Cachet\Locker $locker)
{
$this->locker = $locker;
$this->cache = $cache;
if (extension_loaded('bcmath')) {
$this->addCallback = 'bcadd';
$this->subCallback = 'bcsub';
} elseif (extension_loaded('gmp')) {
$this->addCallback = function ($a, $b) {
return gmp_strval(gmp_add($a, $b));
};
$this->subCallback = function ($a, $b) {
return gmp_strval(gmp_sub($a, $b));
};
} else {
throw new \RuntimeException("Neither bcmath nor gmp extensions present");
}
}示例14: testSingleBit
/**
* @large
*/
public function testSingleBit()
{
$this->assertTrue(BitWiseGmp::isSingleBit(1));
$this->assertTrue(BitWiseGmp::isSingleBit("1"));
$this->assertTrue(BitWiseGmp::isSingleBit(2));
$this->assertTrue(BitWiseGmp::isSingleBit("2"));
$this->assertTrue(BitWiseGmp::isSingleBit(4));
$fails = [3, 5, 6, 7, 9, 10, 11, 13, 14, 15];
foreach ($fails as $checkBit) {
$this->assertFalse(BitWiseGmp::isSingleBit($checkBit));
}
$checkBit = 4;
for ($i = 0; $i < 10000; $i++) {
$checkBit = gmp_mul($checkBit, 2);
$this->assertTrue(BitWiseGmp::isSingleBit($checkBit));
$this->assertFalse(BitWiseGmp::isSingleBit(gmp_sub($checkBit, 3)));
}
}示例15: summa
function summa($type)
{
$total_in = gmp_init('0');
$query = "\n SELECT SUM(amount) AS sum\n FROM purses\n WHERE type='{$type}'\n ";
$result = do_query($query);
$row = get_row($result);
$v = gmp_init($row['sum']);
$total_in = gmp_add($total_in, $v);
$query = "\n SELECT SUM(amount) AS sum\n FROM orderbook\n WHERE type='{$type}' AND status='OPEN'\n ";
$result = do_query($query);
$row = get_row($result);
if (isset($row['sum'])) {
$v = gmp_init($row['sum']);
$total_in = gmp_add($total_in, $v);
}
$query = "\n SELECT SUM(amount) AS sum\n FROM requests\n WHERE curr_type='{$type}' AND req_type='WITHDR' AND status='VERIFY'\n ";
$result = do_query($query);
$row = get_row($result);
if (isset($row['sum'])) {
$v = gmp_init($row['sum']);
$total_in = gmp_add($total_in, $v);
}
$total_in = gmp_strval($total_in);
$total_out = gmp_init('0');
$query = "\n SELECT SUM(amount) AS sum\n FROM requests\n WHERE curr_type='{$type}' AND req_type='DEPOS' AND status='FINAL'\n ";
$result = do_query($query);
$row = get_row($result);
if (isset($row['sum'])) {
$v = gmp_init($row['sum']);
$total_out = gmp_add($total_out, $v);
}
$query = "\n SELECT SUM(amount) AS sum\n FROM requests\n WHERE curr_type='{$type}' AND req_type='WITHDR' AND status='FINAL'\n ";
$result = do_query($query);
$row = get_row($result);
if (isset($row['sum'])) {
$v = gmp_init($row['sum']);
$total_out = gmp_sub($total_out, $v);
}
$total_out = gmp_strval($total_out);
echo "{$type} = {$total_in}\t {$total_out}\n";
if (gmp_cmp($total_in, $total_out) != 0) {
echo "*********** MISMATCH ****************\n";
}
}