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-rw-r--r--vendor/paragonie/constant_time_encoding/src/Base32.php471
1 files changed, 471 insertions, 0 deletions
diff --git a/vendor/paragonie/constant_time_encoding/src/Base32.php b/vendor/paragonie/constant_time_encoding/src/Base32.php
new file mode 100644
index 000000000..7784bafbf
--- /dev/null
+++ b/vendor/paragonie/constant_time_encoding/src/Base32.php
@@ -0,0 +1,471 @@
+<?php
+declare(strict_types=1);
+namespace ParagonIE\ConstantTime;
+
+/**
+ * Copyright (c) 2016 - 2018 Paragon Initiative Enterprises.
+ * Copyright (c) 2014 Steve "Sc00bz" Thomas (steve at tobtu dot com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/**
+ * Class Base32
+ * [A-Z][2-7]
+ *
+ * @package ParagonIE\ConstantTime
+ */
+abstract class Base32 implements EncoderInterface
+{
+ /**
+ * Decode a Base32-encoded string into raw binary
+ *
+ * @param string $encodedString
+ * @param bool $strictPadding
+ * @return string
+ */
+ public static function decode(string $encodedString, bool $strictPadding = false): string
+ {
+ return static::doDecode($encodedString, false, $strictPadding);
+ }
+
+ /**
+ * Decode an uppercase Base32-encoded string into raw binary
+ *
+ * @param string $src
+ * @param bool $strictPadding
+ * @return string
+ */
+ public static function decodeUpper(string $src, bool $strictPadding = false): string
+ {
+ return static::doDecode($src, true, $strictPadding);
+ }
+
+ /**
+ * Encode into Base32 (RFC 4648)
+ *
+ * @param string $src
+ * @return string
+ * @throws \TypeError
+ */
+ public static function encode(string $src): string
+ {
+ return static::doEncode($src, false, true);
+ }
+ /**
+ * Encode into Base32 (RFC 4648)
+ *
+ * @param string $src
+ * @return string
+ * @throws \TypeError
+ */
+ public static function encodeUnpadded(string $src): string
+ {
+ return static::doEncode($src, false, false);
+ }
+
+ /**
+ * Encode into uppercase Base32 (RFC 4648)
+ *
+ * @param string $src
+ * @return string
+ * @throws \TypeError
+ */
+ public static function encodeUpper(string $src): string
+ {
+ return static::doEncode($src, true, true);
+ }
+
+ /**
+ * Encode into uppercase Base32 (RFC 4648)
+ *
+ * @param string $src
+ * @return string
+ * @throws \TypeError
+ */
+ public static function encodeUpperUnpadded(string $src): string
+ {
+ return static::doEncode($src, true, false);
+ }
+
+ /**
+ * Uses bitwise operators instead of table-lookups to turn 5-bit integers
+ * into 8-bit integers.
+ *
+ * @param int $src
+ * @return int
+ */
+ protected static function decode5Bits(int $src): int
+ {
+ $ret = -1;
+
+ // if ($src > 96 && $src < 123) $ret += $src - 97 + 1; // -64
+ $ret += (((0x60 - $src) & ($src - 0x7b)) >> 8) & ($src - 96);
+
+ // if ($src > 0x31 && $src < 0x38) $ret += $src - 24 + 1; // -23
+ $ret += (((0x31 - $src) & ($src - 0x38)) >> 8) & ($src - 23);
+
+ return $ret;
+ }
+
+ /**
+ * Uses bitwise operators instead of table-lookups to turn 5-bit integers
+ * into 8-bit integers.
+ *
+ * Uppercase variant.
+ *
+ * @param int $src
+ * @return int
+ */
+ protected static function decode5BitsUpper(int $src): int
+ {
+ $ret = -1;
+
+ // if ($src > 64 && $src < 91) $ret += $src - 65 + 1; // -64
+ $ret += (((0x40 - $src) & ($src - 0x5b)) >> 8) & ($src - 64);
+
+ // if ($src > 0x31 && $src < 0x38) $ret += $src - 24 + 1; // -23
+ $ret += (((0x31 - $src) & ($src - 0x38)) >> 8) & ($src - 23);
+
+ return $ret;
+ }
+
+ /**
+ * Uses bitwise operators instead of table-lookups to turn 8-bit integers
+ * into 5-bit integers.
+ *
+ * @param int $src
+ * @return string
+ */
+ protected static function encode5Bits(int $src): string
+ {
+ $diff = 0x61;
+
+ // if ($src > 25) $ret -= 72;
+ $diff -= ((25 - $src) >> 8) & 73;
+
+ return \pack('C', $src + $diff);
+ }
+
+ /**
+ * Uses bitwise operators instead of table-lookups to turn 8-bit integers
+ * into 5-bit integers.
+ *
+ * Uppercase variant.
+ *
+ * @param int $src
+ * @return string
+ */
+ protected static function encode5BitsUpper(int $src): string
+ {
+ $diff = 0x41;
+
+ // if ($src > 25) $ret -= 40;
+ $diff -= ((25 - $src) >> 8) & 41;
+
+ return \pack('C', $src + $diff);
+ }
+
+
+ /**
+ * Base32 decoding
+ *
+ * @param string $src
+ * @param bool $upper
+ * @param bool $strictPadding
+ * @return string
+ * @throws \TypeError
+ * @psalm-suppress RedundantCondition
+ */
+ protected static function doDecode(string $src, bool $upper = false, bool $strictPadding = false): string
+ {
+ // We do this to reduce code duplication:
+ $method = $upper
+ ? 'decode5BitsUpper'
+ : 'decode5Bits';
+
+ // Remove padding
+ $srcLen = Binary::safeStrlen($src);
+ if ($srcLen === 0) {
+ return '';
+ }
+ if ($strictPadding) {
+ if (($srcLen & 7) === 0) {
+ for ($j = 0; $j < 7; ++$j) {
+ if ($src[$srcLen - 1] === '=') {
+ $srcLen--;
+ } else {
+ break;
+ }
+ }
+ }
+ if (($srcLen & 7) === 1) {
+ throw new \RangeException(
+ 'Incorrect padding'
+ );
+ }
+ } else {
+ $src = \rtrim($src, '=');
+ $srcLen = Binary::safeStrlen($src);
+ }
+
+ $err = 0;
+ $dest = '';
+ // Main loop (no padding):
+ for ($i = 0; $i + 8 <= $srcLen; $i += 8) {
+ /** @var array<int, int> $chunk */
+ $chunk = \unpack('C*', Binary::safeSubstr($src, $i, 8));
+ /** @var int $c0 */
+ $c0 = static::$method($chunk[1]);
+ /** @var int $c1 */
+ $c1 = static::$method($chunk[2]);
+ /** @var int $c2 */
+ $c2 = static::$method($chunk[3]);
+ /** @var int $c3 */
+ $c3 = static::$method($chunk[4]);
+ /** @var int $c4 */
+ $c4 = static::$method($chunk[5]);
+ /** @var int $c5 */
+ $c5 = static::$method($chunk[6]);
+ /** @var int $c6 */
+ $c6 = static::$method($chunk[7]);
+ /** @var int $c7 */
+ $c7 = static::$method($chunk[8]);
+
+ $dest .= \pack(
+ 'CCCCC',
+ (($c0 << 3) | ($c1 >> 2) ) & 0xff,
+ (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff,
+ (($c3 << 4) | ($c4 >> 1) ) & 0xff,
+ (($c4 << 7) | ($c5 << 2) | ($c6 >> 3)) & 0xff,
+ (($c6 << 5) | ($c7 ) ) & 0xff
+ );
+ $err |= ($c0 | $c1 | $c2 | $c3 | $c4 | $c5 | $c6 | $c7) >> 8;
+ }
+ // The last chunk, which may have padding:
+ if ($i < $srcLen) {
+ /** @var array<int, int> $chunk */
+ $chunk = \unpack('C*', Binary::safeSubstr($src, $i, $srcLen - $i));
+ /** @var int $c0 */
+ $c0 = static::$method($chunk[1]);
+
+ if ($i + 6 < $srcLen) {
+ /** @var int $c1 */
+ $c1 = static::$method($chunk[2]);
+ /** @var int $c2 */
+ $c2 = static::$method($chunk[3]);
+ /** @var int $c3 */
+ $c3 = static::$method($chunk[4]);
+ /** @var int $c4 */
+ $c4 = static::$method($chunk[5]);
+ /** @var int $c5 */
+ $c5 = static::$method($chunk[6]);
+ /** @var int $c6 */
+ $c6 = static::$method($chunk[7]);
+
+ $dest .= \pack(
+ 'CCCC',
+ (($c0 << 3) | ($c1 >> 2) ) & 0xff,
+ (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff,
+ (($c3 << 4) | ($c4 >> 1) ) & 0xff,
+ (($c4 << 7) | ($c5 << 2) | ($c6 >> 3)) & 0xff
+ );
+ $err |= ($c0 | $c1 | $c2 | $c3 | $c4 | $c5 | $c6) >> 8;
+ } elseif ($i + 5 < $srcLen) {
+ /** @var int $c1 */
+ $c1 = static::$method($chunk[2]);
+ /** @var int $c2 */
+ $c2 = static::$method($chunk[3]);
+ /** @var int $c3 */
+ $c3 = static::$method($chunk[4]);
+ /** @var int $c4 */
+ $c4 = static::$method($chunk[5]);
+ /** @var int $c5 */
+ $c5 = static::$method($chunk[6]);
+
+ $dest .= \pack(
+ 'CCCC',
+ (($c0 << 3) | ($c1 >> 2) ) & 0xff,
+ (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff,
+ (($c3 << 4) | ($c4 >> 1) ) & 0xff,
+ (($c4 << 7) | ($c5 << 2) ) & 0xff
+ );
+ $err |= ($c0 | $c1 | $c2 | $c3 | $c4 | $c5) >> 8;
+ } elseif ($i + 4 < $srcLen) {
+ /** @var int $c1 */
+ $c1 = static::$method($chunk[2]);
+ /** @var int $c2 */
+ $c2 = static::$method($chunk[3]);
+ /** @var int $c3 */
+ $c3 = static::$method($chunk[4]);
+ /** @var int $c4 */
+ $c4 = static::$method($chunk[5]);
+
+ $dest .= \pack(
+ 'CCC',
+ (($c0 << 3) | ($c1 >> 2) ) & 0xff,
+ (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff,
+ (($c3 << 4) | ($c4 >> 1) ) & 0xff
+ );
+ $err |= ($c0 | $c1 | $c2 | $c3 | $c4) >> 8;
+ } elseif ($i + 3 < $srcLen) {
+ /** @var int $c1 */
+ $c1 = static::$method($chunk[2]);
+ /** @var int $c2 */
+ $c2 = static::$method($chunk[3]);
+ /** @var int $c3 */
+ $c3 = static::$method($chunk[4]);
+
+ $dest .= \pack(
+ 'CC',
+ (($c0 << 3) | ($c1 >> 2) ) & 0xff,
+ (($c1 << 6) | ($c2 << 1) | ($c3 >> 4)) & 0xff
+ );
+ $err |= ($c0 | $c1 | $c2 | $c3) >> 8;
+ } elseif ($i + 2 < $srcLen) {
+ /** @var int $c1 */
+ $c1 = static::$method($chunk[2]);
+ /** @var int $c2 */
+ $c2 = static::$method($chunk[3]);
+
+ $dest .= \pack(
+ 'CC',
+ (($c0 << 3) | ($c1 >> 2) ) & 0xff,
+ (($c1 << 6) | ($c2 << 1) ) & 0xff
+ );
+ $err |= ($c0 | $c1 | $c2) >> 8;
+ } elseif ($i + 1 < $srcLen) {
+ /** @var int $c1 */
+ $c1 = static::$method($chunk[2]);
+
+ $dest .= \pack(
+ 'C',
+ (($c0 << 3) | ($c1 >> 2) ) & 0xff
+ );
+ $err |= ($c0 | $c1) >> 8;
+ } else {
+ $dest .= \pack(
+ 'C',
+ (($c0 << 3) ) & 0xff
+ );
+ $err |= ($c0) >> 8;
+ }
+ }
+ /** @var bool $check */
+ $check = ($err === 0);
+ if (!$check) {
+ throw new \RangeException(
+ 'Base32::doDecode() only expects characters in the correct base32 alphabet'
+ );
+ }
+ return $dest;
+ }
+
+ /**
+ * Base32 Encoding
+ *
+ * @param string $src
+ * @param bool $upper
+ * @param bool $pad
+ * @return string
+ * @throws \TypeError
+ */
+ protected static function doEncode(string $src, bool $upper = false, $pad = true): string
+ {
+ // We do this to reduce code duplication:
+ $method = $upper
+ ? 'encode5BitsUpper'
+ : 'encode5Bits';
+
+ $dest = '';
+ $srcLen = Binary::safeStrlen($src);
+
+ // Main loop (no padding):
+ for ($i = 0; $i + 5 <= $srcLen; $i += 5) {
+ /** @var array<int, int> $chunk */
+ $chunk = \unpack('C*', Binary::safeSubstr($src, $i, 5));
+ $b0 = $chunk[1];
+ $b1 = $chunk[2];
+ $b2 = $chunk[3];
+ $b3 = $chunk[4];
+ $b4 = $chunk[5];
+ $dest .=
+ static::$method( ($b0 >> 3) & 31) .
+ static::$method((($b0 << 2) | ($b1 >> 6)) & 31) .
+ static::$method((($b1 >> 1) ) & 31) .
+ static::$method((($b1 << 4) | ($b2 >> 4)) & 31) .
+ static::$method((($b2 << 1) | ($b3 >> 7)) & 31) .
+ static::$method((($b3 >> 2) ) & 31) .
+ static::$method((($b3 << 3) | ($b4 >> 5)) & 31) .
+ static::$method( $b4 & 31);
+ }
+ // The last chunk, which may have padding:
+ if ($i < $srcLen) {
+ /** @var array<int, int> $chunk */
+ $chunk = \unpack('C*', Binary::safeSubstr($src, $i, $srcLen - $i));
+ $b0 = $chunk[1];
+ if ($i + 3 < $srcLen) {
+ $b1 = $chunk[2];
+ $b2 = $chunk[3];
+ $b3 = $chunk[4];
+ $dest .=
+ static::$method( ($b0 >> 3) & 31) .
+ static::$method((($b0 << 2) | ($b1 >> 6)) & 31) .
+ static::$method((($b1 >> 1) ) & 31) .
+ static::$method((($b1 << 4) | ($b2 >> 4)) & 31) .
+ static::$method((($b2 << 1) | ($b3 >> 7)) & 31) .
+ static::$method((($b3 >> 2) ) & 31) .
+ static::$method((($b3 << 3) ) & 31);
+ if ($pad) {
+ $dest .= '=';
+ }
+ } elseif ($i + 2 < $srcLen) {
+ $b1 = $chunk[2];
+ $b2 = $chunk[3];
+ $dest .=
+ static::$method( ($b0 >> 3) & 31) .
+ static::$method((($b0 << 2) | ($b1 >> 6)) & 31) .
+ static::$method((($b1 >> 1) ) & 31) .
+ static::$method((($b1 << 4) | ($b2 >> 4)) & 31) .
+ static::$method((($b2 << 1) ) & 31);
+ if ($pad) {
+ $dest .= '===';
+ }
+ } elseif ($i + 1 < $srcLen) {
+ $b1 = $chunk[2];
+ $dest .=
+ static::$method( ($b0 >> 3) & 31) .
+ static::$method((($b0 << 2) | ($b1 >> 6)) & 31) .
+ static::$method((($b1 >> 1) ) & 31) .
+ static::$method((($b1 << 4) ) & 31);
+ if ($pad) {
+ $dest .= '====';
+ }
+ } else {
+ $dest .=
+ static::$method( ($b0 >> 3) & 31) .
+ static::$method( ($b0 << 2) & 31);
+ if ($pad) {
+ $dest .= '======';
+ }
+ }
+ }
+ return $dest;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 05:43:51 +0000