class ParagonIE_Sodium_Core_Base64_UrlSafe in Automatic Updates 7
Same name and namespace in other branches
- 8 vendor/paragonie/sodium_compat/src/Core/Base64/UrlSafe.php \ParagonIE_Sodium_Core_Base64_UrlSafe
Class ParagonIE_Sodium_Core_Base64UrlSafe
Copyright (c) 2016 - 2018 Paragon Initiative Enterprises. Copyright (c) 2014 Steve "Sc00bz" Thomas (steve at tobtu dot com)
Hierarchy
Expanded class hierarchy of ParagonIE_Sodium_Core_Base64_UrlSafe
File
- vendor/
paragonie/ sodium_compat/ src/ Core/ Base64/ UrlSafe.php, line 9
View source
class ParagonIE_Sodium_Core_Base64_UrlSafe {
// COPY ParagonIE_Sodium_Core_Base64_Common STARTING HERE
/**
* Encode into Base64
*
* Base64 character set "[A-Z][a-z][0-9]+/"
*
* @param string $src
* @return string
* @throws TypeError
*/
public static function encode($src) {
return self::doEncode($src, true);
}
/**
* Encode into Base64, no = padding
*
* Base64 character set "[A-Z][a-z][0-9]+/"
*
* @param string $src
* @return string
* @throws TypeError
*/
public static function encodeUnpadded($src) {
return self::doEncode($src, false);
}
/**
* @param string $src
* @param bool $pad Include = padding?
* @return string
* @throws TypeError
*/
protected static function doEncode($src, $pad = true) {
$dest = '';
$srcLen = ParagonIE_Sodium_Core_Util::strlen($src);
// Main loop (no padding):
for ($i = 0; $i + 3 <= $srcLen; $i += 3) {
/** @var array<int, int> $chunk */
$chunk = unpack('C*', ParagonIE_Sodium_Core_Util::substr($src, $i, 3));
$b0 = $chunk[1];
$b1 = $chunk[2];
$b2 = $chunk[3];
$dest .= self::encode6Bits($b0 >> 2) . self::encode6Bits(($b0 << 4 | $b1 >> 4) & 63) . self::encode6Bits(($b1 << 2 | $b2 >> 6) & 63) . self::encode6Bits($b2 & 63);
}
// The last chunk, which may have padding:
if ($i < $srcLen) {
/** @var array<int, int> $chunk */
$chunk = unpack('C*', ParagonIE_Sodium_Core_Util::substr($src, $i, $srcLen - $i));
$b0 = $chunk[1];
if ($i + 1 < $srcLen) {
$b1 = $chunk[2];
$dest .= self::encode6Bits($b0 >> 2) . self::encode6Bits(($b0 << 4 | $b1 >> 4) & 63) . self::encode6Bits($b1 << 2 & 63);
if ($pad) {
$dest .= '=';
}
}
else {
$dest .= self::encode6Bits($b0 >> 2) . self::encode6Bits($b0 << 4 & 63);
if ($pad) {
$dest .= '==';
}
}
}
return $dest;
}
/**
* decode from base64 into binary
*
* Base64 character set "./[A-Z][a-z][0-9]"
*
* @param string $src
* @param bool $strictPadding
* @return string
* @throws RangeException
* @throws TypeError
* @psalm-suppress RedundantCondition
*/
public static function decode($src, $strictPadding = false) {
// Remove padding
$srcLen = ParagonIE_Sodium_Core_Util::strlen($src);
if ($srcLen === 0) {
return '';
}
if ($strictPadding) {
if (($srcLen & 3) === 0) {
if ($src[$srcLen - 1] === '=') {
$srcLen--;
if ($src[$srcLen - 1] === '=') {
$srcLen--;
}
}
}
if (($srcLen & 3) === 1) {
throw new RangeException('Incorrect padding');
}
if ($src[$srcLen - 1] === '=') {
throw new RangeException('Incorrect padding');
}
}
else {
$src = rtrim($src, '=');
$srcLen = ParagonIE_Sodium_Core_Util::strlen($src);
}
$err = 0;
$dest = '';
// Main loop (no padding):
for ($i = 0; $i + 4 <= $srcLen; $i += 4) {
/** @var array<int, int> $chunk */
$chunk = unpack('C*', ParagonIE_Sodium_Core_Util::substr($src, $i, 4));
$c0 = self::decode6Bits($chunk[1]);
$c1 = self::decode6Bits($chunk[2]);
$c2 = self::decode6Bits($chunk[3]);
$c3 = self::decode6Bits($chunk[4]);
$dest .= pack('CCC', ($c0 << 2 | $c1 >> 4) & 0xff, ($c1 << 4 | $c2 >> 2) & 0xff, ($c2 << 6 | $c3) & 0xff);
$err |= ($c0 | $c1 | $c2 | $c3) >> 8;
}
// The last chunk, which may have padding:
if ($i < $srcLen) {
/** @var array<int, int> $chunk */
$chunk = unpack('C*', ParagonIE_Sodium_Core_Util::substr($src, $i, $srcLen - $i));
$c0 = self::decode6Bits($chunk[1]);
if ($i + 2 < $srcLen) {
$c1 = self::decode6Bits($chunk[2]);
$c2 = self::decode6Bits($chunk[3]);
$dest .= pack('CC', ($c0 << 2 | $c1 >> 4) & 0xff, ($c1 << 4 | $c2 >> 2) & 0xff);
$err |= ($c0 | $c1 | $c2) >> 8;
}
elseif ($i + 1 < $srcLen) {
$c1 = self::decode6Bits($chunk[2]);
$dest .= pack('C', ($c0 << 2 | $c1 >> 4) & 0xff);
$err |= ($c0 | $c1) >> 8;
}
elseif ($i < $srcLen && $strictPadding) {
$err |= 1;
}
}
/** @var bool $check */
$check = $err === 0;
if (!$check) {
throw new RangeException('Base64::decode() only expects characters in the correct base64 alphabet');
}
return $dest;
}
// COPY ParagonIE_Sodium_Core_Base64_Common ENDING HERE
/**
* Uses bitwise operators instead of table-lookups to turn 6-bit integers
* into 8-bit integers.
*
* Base64 character set:
* [A-Z] [a-z] [0-9] + /
* 0x41-0x5a, 0x61-0x7a, 0x30-0x39, 0x2b, 0x2f
*
* @param int $src
* @return int
*/
protected static function decode6Bits($src) {
$ret = -1;
// if ($src > 0x40 && $src < 0x5b) $ret += $src - 0x41 + 1; // -64
$ret += (0x40 - $src & $src - 0x5b) >> 8 & $src - 64;
// if ($src > 0x60 && $src < 0x7b) $ret += $src - 0x61 + 26 + 1; // -70
$ret += (0x60 - $src & $src - 0x7b) >> 8 & $src - 70;
// if ($src > 0x2f && $src < 0x3a) $ret += $src - 0x30 + 52 + 1; // 5
$ret += (0x2f - $src & $src - 0x3a) >> 8 & $src + 5;
// if ($src == 0x2c) $ret += 62 + 1;
$ret += (0x2c - $src & $src - 0x2e) >> 8 & 63;
// if ($src == 0x5f) ret += 63 + 1;
$ret += (0x5e - $src & $src - 0x60) >> 8 & 64;
return $ret;
}
/**
* Uses bitwise operators instead of table-lookups to turn 8-bit integers
* into 6-bit integers.
*
* @param int $src
* @return string
*/
protected static function encode6Bits($src) {
$diff = 0x41;
// if ($src > 25) $diff += 0x61 - 0x41 - 26; // 6
$diff += 25 - $src >> 8 & 6;
// if ($src > 51) $diff += 0x30 - 0x61 - 26; // -75
$diff -= 51 - $src >> 8 & 75;
// if ($src > 61) $diff += 0x2d - 0x30 - 10; // -13
$diff -= 61 - $src >> 8 & 13;
// if ($src > 62) $diff += 0x5f - 0x2b - 1; // 3
$diff += 62 - $src >> 8 & 49;
return pack('C', $src + $diff);
}
}
Members
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
ParagonIE_Sodium_Core_Base64_UrlSafe:: |
public static | function | decode from base64 into binary | |
ParagonIE_Sodium_Core_Base64_UrlSafe:: |
protected static | function | Uses bitwise operators instead of table-lookups to turn 6-bit integers into 8-bit integers. | |
ParagonIE_Sodium_Core_Base64_UrlSafe:: |
protected static | function | ||
ParagonIE_Sodium_Core_Base64_UrlSafe:: |
public static | function | Encode into Base64 | |
ParagonIE_Sodium_Core_Base64_UrlSafe:: |
protected static | function | Uses bitwise operators instead of table-lookups to turn 8-bit integers into 6-bit integers. | |
ParagonIE_Sodium_Core_Base64_UrlSafe:: |
public static | function | Encode into Base64, no = padding |