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BigInteger: use gmp_import / gmp_export when available

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This commit is contained in:
terrafrost 2017-09-10 14:56:57 -05:00
parent 76070ff5e2
commit b6d0e37432
1 changed files with 13 additions and 5 deletions
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12
phpseclib/Math/BigInteger.php
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@ -360,8 +360,12 @@ class Math_BigInteger
case 256:
switch (MATH_BIGINTEGER_MODE) {
case MATH_BIGINTEGER_MODE_GMP:
$sign = $this->is_negative ? '-' : '';
$this->value = gmp_init($sign . '0x' . bin2hex($x));
$this->value = function_exists('gmp_import') ?
gmp_import($x) :
gmp_init('0x' . bin2hex($x));
if ($this->is_negative) {
$this->value = gmp_neg($this->value);
}
break;
case MATH_BIGINTEGER_MODE_BCMATH:
// round $len to the nearest 4 (thanks, DavidMJ!)
@ -563,9 +567,13 @@ class Math_BigInteger
return $this->precision > 0 ? str_repeat(chr(0), ($this->precision + 1) >> 3) : '';
}
if (function_exists('gmp_export')) {
$temp = gmp_export($this->value);
} else {
$temp = gmp_strval(gmp_abs($this->value), 16);
$temp = (strlen($temp) & 1) ? '0' . $temp : $temp;
$temp = pack('H*', $temp);
}
return $this->precision > 0 ?
substr(str_pad($temp, $this->precision >> 3, chr(0), STR_PAD_LEFT), -($this->precision >> 3)) :