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-rw-r--r--vendor/paragonie/sodium_compat/src/Core/ChaCha20.php395
1 files changed, 395 insertions, 0 deletions
diff --git a/vendor/paragonie/sodium_compat/src/Core/ChaCha20.php b/vendor/paragonie/sodium_compat/src/Core/ChaCha20.php
new file mode 100644
index 0000000..806010c
--- /dev/null
+++ b/vendor/paragonie/sodium_compat/src/Core/ChaCha20.php
@@ -0,0 +1,395 @@
+<?php
+
+if (class_exists('ParagonIE_Sodium_Core_ChaCha20', false)) {
+ return;
+}
+
+/**
+ * Class ParagonIE_Sodium_Core_ChaCha20
+ */
+class ParagonIE_Sodium_Core_ChaCha20 extends ParagonIE_Sodium_Core_Util
+{
+ /**
+ * Bitwise left rotation
+ *
+ * @internal You should not use this directly from another application
+ *
+ * @param int $v
+ * @param int $n
+ * @return int
+ */
+ public static function rotate($v, $n)
+ {
+ $v &= 0xffffffff;
+ $n &= 31;
+ return (int) (
+ 0xffffffff & (
+ ($v << $n)
+ |
+ ($v >> (32 - $n))
+ )
+ );
+ }
+
+ /**
+ * The ChaCha20 quarter round function. Works on four 32-bit integers.
+ *
+ * @internal You should not use this directly from another application
+ *
+ * @param int $a
+ * @param int $b
+ * @param int $c
+ * @param int $d
+ * @return array<int, int>
+ */
+ protected static function quarterRound($a, $b, $c, $d)
+ {
+ # a = PLUS(a,b); d = ROTATE(XOR(d,a),16);
+ /** @var int $a */
+ $a = ($a + $b) & 0xffffffff;
+ $d = self::rotate($d ^ $a, 16);
+
+ # c = PLUS(c,d); b = ROTATE(XOR(b,c),12);
+ /** @var int $c */
+ $c = ($c + $d) & 0xffffffff;
+ $b = self::rotate($b ^ $c, 12);
+
+ # a = PLUS(a,b); d = ROTATE(XOR(d,a), 8);
+ /** @var int $a */
+ $a = ($a + $b) & 0xffffffff;
+ $d = self::rotate($d ^ $a, 8);
+
+ # c = PLUS(c,d); b = ROTATE(XOR(b,c), 7);
+ /** @var int $c */
+ $c = ($c + $d) & 0xffffffff;
+ $b = self::rotate($b ^ $c, 7);
+ return array((int) $a, (int) $b, (int) $c, (int) $d);
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param ParagonIE_Sodium_Core_ChaCha20_Ctx $ctx
+ * @param string $message
+ *
+ * @return string
+ * @throws TypeError
+ * @throws SodiumException
+ */
+ public static function encryptBytes(
+ ParagonIE_Sodium_Core_ChaCha20_Ctx $ctx,
+ $message = ''
+ ) {
+ $bytes = self::strlen($message);
+
+ /*
+ j0 = ctx->input[0];
+ j1 = ctx->input[1];
+ j2 = ctx->input[2];
+ j3 = ctx->input[3];
+ j4 = ctx->input[4];
+ j5 = ctx->input[5];
+ j6 = ctx->input[6];
+ j7 = ctx->input[7];
+ j8 = ctx->input[8];
+ j9 = ctx->input[9];
+ j10 = ctx->input[10];
+ j11 = ctx->input[11];
+ j12 = ctx->input[12];
+ j13 = ctx->input[13];
+ j14 = ctx->input[14];
+ j15 = ctx->input[15];
+ */
+ $j0 = (int) $ctx[0];
+ $j1 = (int) $ctx[1];
+ $j2 = (int) $ctx[2];
+ $j3 = (int) $ctx[3];
+ $j4 = (int) $ctx[4];
+ $j5 = (int) $ctx[5];
+ $j6 = (int) $ctx[6];
+ $j7 = (int) $ctx[7];
+ $j8 = (int) $ctx[8];
+ $j9 = (int) $ctx[9];
+ $j10 = (int) $ctx[10];
+ $j11 = (int) $ctx[11];
+ $j12 = (int) $ctx[12];
+ $j13 = (int) $ctx[13];
+ $j14 = (int) $ctx[14];
+ $j15 = (int) $ctx[15];
+
+ $c = '';
+ for (;;) {
+ if ($bytes < 64) {
+ $message .= str_repeat("\x00", 64 - $bytes);
+ }
+
+ $x0 = (int) $j0;
+ $x1 = (int) $j1;
+ $x2 = (int) $j2;
+ $x3 = (int) $j3;
+ $x4 = (int) $j4;
+ $x5 = (int) $j5;
+ $x6 = (int) $j6;
+ $x7 = (int) $j7;
+ $x8 = (int) $j8;
+ $x9 = (int) $j9;
+ $x10 = (int) $j10;
+ $x11 = (int) $j11;
+ $x12 = (int) $j12;
+ $x13 = (int) $j13;
+ $x14 = (int) $j14;
+ $x15 = (int) $j15;
+
+ # for (i = 20; i > 0; i -= 2) {
+ for ($i = 20; $i > 0; $i -= 2) {
+ # QUARTERROUND( x0, x4, x8, x12)
+ list($x0, $x4, $x8, $x12) = self::quarterRound($x0, $x4, $x8, $x12);
+
+ # QUARTERROUND( x1, x5, x9, x13)
+ list($x1, $x5, $x9, $x13) = self::quarterRound($x1, $x5, $x9, $x13);
+
+ # QUARTERROUND( x2, x6, x10, x14)
+ list($x2, $x6, $x10, $x14) = self::quarterRound($x2, $x6, $x10, $x14);
+
+ # QUARTERROUND( x3, x7, x11, x15)
+ list($x3, $x7, $x11, $x15) = self::quarterRound($x3, $x7, $x11, $x15);
+
+ # QUARTERROUND( x0, x5, x10, x15)
+ list($x0, $x5, $x10, $x15) = self::quarterRound($x0, $x5, $x10, $x15);
+
+ # QUARTERROUND( x1, x6, x11, x12)
+ list($x1, $x6, $x11, $x12) = self::quarterRound($x1, $x6, $x11, $x12);
+
+ # QUARTERROUND( x2, x7, x8, x13)
+ list($x2, $x7, $x8, $x13) = self::quarterRound($x2, $x7, $x8, $x13);
+
+ # QUARTERROUND( x3, x4, x9, x14)
+ list($x3, $x4, $x9, $x14) = self::quarterRound($x3, $x4, $x9, $x14);
+ }
+ /*
+ x0 = PLUS(x0, j0);
+ x1 = PLUS(x1, j1);
+ x2 = PLUS(x2, j2);
+ x3 = PLUS(x3, j3);
+ x4 = PLUS(x4, j4);
+ x5 = PLUS(x5, j5);
+ x6 = PLUS(x6, j6);
+ x7 = PLUS(x7, j7);
+ x8 = PLUS(x8, j8);
+ x9 = PLUS(x9, j9);
+ x10 = PLUS(x10, j10);
+ x11 = PLUS(x11, j11);
+ x12 = PLUS(x12, j12);
+ x13 = PLUS(x13, j13);
+ x14 = PLUS(x14, j14);
+ x15 = PLUS(x15, j15);
+ */
+ /** @var int $x0 */
+ $x0 = ($x0 & 0xffffffff) + $j0;
+ /** @var int $x1 */
+ $x1 = ($x1 & 0xffffffff) + $j1;
+ /** @var int $x2 */
+ $x2 = ($x2 & 0xffffffff) + $j2;
+ /** @var int $x3 */
+ $x3 = ($x3 & 0xffffffff) + $j3;
+ /** @var int $x4 */
+ $x4 = ($x4 & 0xffffffff) + $j4;
+ /** @var int $x5 */
+ $x5 = ($x5 & 0xffffffff) + $j5;
+ /** @var int $x6 */
+ $x6 = ($x6 & 0xffffffff) + $j6;
+ /** @var int $x7 */
+ $x7 = ($x7 & 0xffffffff) + $j7;
+ /** @var int $x8 */
+ $x8 = ($x8 & 0xffffffff) + $j8;
+ /** @var int $x9 */
+ $x9 = ($x9 & 0xffffffff) + $j9;
+ /** @var int $x10 */
+ $x10 = ($x10 & 0xffffffff) + $j10;
+ /** @var int $x11 */
+ $x11 = ($x11 & 0xffffffff) + $j11;
+ /** @var int $x12 */
+ $x12 = ($x12 & 0xffffffff) + $j12;
+ /** @var int $x13 */
+ $x13 = ($x13 & 0xffffffff) + $j13;
+ /** @var int $x14 */
+ $x14 = ($x14 & 0xffffffff) + $j14;
+ /** @var int $x15 */
+ $x15 = ($x15 & 0xffffffff) + $j15;
+
+ /*
+ x0 = XOR(x0, LOAD32_LE(m + 0));
+ x1 = XOR(x1, LOAD32_LE(m + 4));
+ x2 = XOR(x2, LOAD32_LE(m + 8));
+ x3 = XOR(x3, LOAD32_LE(m + 12));
+ x4 = XOR(x4, LOAD32_LE(m + 16));
+ x5 = XOR(x5, LOAD32_LE(m + 20));
+ x6 = XOR(x6, LOAD32_LE(m + 24));
+ x7 = XOR(x7, LOAD32_LE(m + 28));
+ x8 = XOR(x8, LOAD32_LE(m + 32));
+ x9 = XOR(x9, LOAD32_LE(m + 36));
+ x10 = XOR(x10, LOAD32_LE(m + 40));
+ x11 = XOR(x11, LOAD32_LE(m + 44));
+ x12 = XOR(x12, LOAD32_LE(m + 48));
+ x13 = XOR(x13, LOAD32_LE(m + 52));
+ x14 = XOR(x14, LOAD32_LE(m + 56));
+ x15 = XOR(x15, LOAD32_LE(m + 60));
+ */
+ $x0 ^= self::load_4(self::substr($message, 0, 4));
+ $x1 ^= self::load_4(self::substr($message, 4, 4));
+ $x2 ^= self::load_4(self::substr($message, 8, 4));
+ $x3 ^= self::load_4(self::substr($message, 12, 4));
+ $x4 ^= self::load_4(self::substr($message, 16, 4));
+ $x5 ^= self::load_4(self::substr($message, 20, 4));
+ $x6 ^= self::load_4(self::substr($message, 24, 4));
+ $x7 ^= self::load_4(self::substr($message, 28, 4));
+ $x8 ^= self::load_4(self::substr($message, 32, 4));
+ $x9 ^= self::load_4(self::substr($message, 36, 4));
+ $x10 ^= self::load_4(self::substr($message, 40, 4));
+ $x11 ^= self::load_4(self::substr($message, 44, 4));
+ $x12 ^= self::load_4(self::substr($message, 48, 4));
+ $x13 ^= self::load_4(self::substr($message, 52, 4));
+ $x14 ^= self::load_4(self::substr($message, 56, 4));
+ $x15 ^= self::load_4(self::substr($message, 60, 4));
+
+ /*
+ j12 = PLUSONE(j12);
+ if (!j12) {
+ j13 = PLUSONE(j13);
+ }
+ */
+ ++$j12;
+ if ($j12 & 0xf0000000) {
+ throw new SodiumException('Overflow');
+ }
+
+ /*
+ STORE32_LE(c + 0, x0);
+ STORE32_LE(c + 4, x1);
+ STORE32_LE(c + 8, x2);
+ STORE32_LE(c + 12, x3);
+ STORE32_LE(c + 16, x4);
+ STORE32_LE(c + 20, x5);
+ STORE32_LE(c + 24, x6);
+ STORE32_LE(c + 28, x7);
+ STORE32_LE(c + 32, x8);
+ STORE32_LE(c + 36, x9);
+ STORE32_LE(c + 40, x10);
+ STORE32_LE(c + 44, x11);
+ STORE32_LE(c + 48, x12);
+ STORE32_LE(c + 52, x13);
+ STORE32_LE(c + 56, x14);
+ STORE32_LE(c + 60, x15);
+ */
+ $block = self::store32_le((int) ($x0 & 0xffffffff)) .
+ self::store32_le((int) ($x1 & 0xffffffff)) .
+ self::store32_le((int) ($x2 & 0xffffffff)) .
+ self::store32_le((int) ($x3 & 0xffffffff)) .
+ self::store32_le((int) ($x4 & 0xffffffff)) .
+ self::store32_le((int) ($x5 & 0xffffffff)) .
+ self::store32_le((int) ($x6 & 0xffffffff)) .
+ self::store32_le((int) ($x7 & 0xffffffff)) .
+ self::store32_le((int) ($x8 & 0xffffffff)) .
+ self::store32_le((int) ($x9 & 0xffffffff)) .
+ self::store32_le((int) ($x10 & 0xffffffff)) .
+ self::store32_le((int) ($x11 & 0xffffffff)) .
+ self::store32_le((int) ($x12 & 0xffffffff)) .
+ self::store32_le((int) ($x13 & 0xffffffff)) .
+ self::store32_le((int) ($x14 & 0xffffffff)) .
+ self::store32_le((int) ($x15 & 0xffffffff));
+
+ /* Partial block */
+ if ($bytes < 64) {
+ $c .= self::substr($block, 0, $bytes);
+ break;
+ }
+
+ /* Full block */
+ $c .= $block;
+ $bytes -= 64;
+ if ($bytes <= 0) {
+ break;
+ }
+ $message = self::substr($message, 64);
+ }
+ /* end for(;;) loop */
+
+ $ctx[12] = $j12;
+ $ctx[13] = $j13;
+ return $c;
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param int $len
+ * @param string $nonce
+ * @param string $key
+ * @return string
+ * @throws SodiumException
+ * @throws TypeError
+ */
+ public static function stream($len = 64, $nonce = '', $key = '')
+ {
+ return self::encryptBytes(
+ new ParagonIE_Sodium_Core_ChaCha20_Ctx($key, $nonce),
+ str_repeat("\x00", $len)
+ );
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param int $len
+ * @param string $nonce
+ * @param string $key
+ * @return string
+ * @throws SodiumException
+ * @throws TypeError
+ */
+ public static function ietfStream($len, $nonce = '', $key = '')
+ {
+ return self::encryptBytes(
+ new ParagonIE_Sodium_Core_ChaCha20_IetfCtx($key, $nonce),
+ str_repeat("\x00", $len)
+ );
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param string $message
+ * @param string $nonce
+ * @param string $key
+ * @param string $ic
+ * @return string
+ * @throws SodiumException
+ * @throws TypeError
+ */
+ public static function ietfStreamXorIc($message, $nonce = '', $key = '', $ic = '')
+ {
+ return self::encryptBytes(
+ new ParagonIE_Sodium_Core_ChaCha20_IetfCtx($key, $nonce, $ic),
+ $message
+ );
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param string $message
+ * @param string $nonce
+ * @param string $key
+ * @param string $ic
+ * @return string
+ * @throws SodiumException
+ * @throws TypeError
+ */
+ public static function streamXorIc($message, $nonce = '', $key = '', $ic = '')
+ {
+ return self::encryptBytes(
+ new ParagonIE_Sodium_Core_ChaCha20_Ctx($key, $nonce, $ic),
+ $message
+ );
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-29 18:38:21 +0200