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Editing: ChaCha20.php
<?php if (class_exists('ParagonIE_Sodium_Core32_ChaCha20', false)) { return; } /** * Class ParagonIE_Sodium_Core32_ChaCha20 */ class ParagonIE_Sodium_Core32_ChaCha20 extends ParagonIE_Sodium_Core32_Util { /** * The ChaCha20 quarter round function. Works on four 32-bit integers. * * @internal You should not use this directly from another application * * @param ParagonIE_Sodium_Core32_Int32 $a * @param ParagonIE_Sodium_Core32_Int32 $b * @param ParagonIE_Sodium_Core32_Int32 $c * @param ParagonIE_Sodium_Core32_Int32 $d * @return array<int, ParagonIE_Sodium_Core32_Int32> * @throws SodiumException * @throws TypeError */ protected static function quarterRound( ParagonIE_Sodium_Core32_Int32 $a, ParagonIE_Sodium_Core32_Int32 $b, ParagonIE_Sodium_Core32_Int32 $c, ParagonIE_Sodium_Core32_Int32 $d ) { /** @var ParagonIE_Sodium_Core32_Int32 $a */ /** @var ParagonIE_Sodium_Core32_Int32 $b */ /** @var ParagonIE_Sodium_Core32_Int32 $c */ /** @var ParagonIE_Sodium_Core32_Int32 $d */ # a = PLUS(a,b); d = ROTATE(XOR(d,a),16); $a = $a->addInt32($b); $d = $d->xorInt32($a)->rotateLeft(16); # c = PLUS(c,d); b = ROTATE(XOR(b,c),12); $c = $c->addInt32($d); $b = $b->xorInt32($c)->rotateLeft(12); # a = PLUS(a,b); d = ROTATE(XOR(d,a), 8); $a = $a->addInt32($b); $d = $d->xorInt32($a)->rotateLeft(8); # c = PLUS(c,d); b = ROTATE(XOR(b,c), 7); $c = $c->addInt32($d); $b = $b->xorInt32($c)->rotateLeft(7); return array($a, $b, $c, $d); } /** * @internal You should not use this directly from another application * * @param ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx * @param string $message * * @return string * @throws SodiumException * @throws TypeError */ public static function encryptBytes( ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx, $message = '' ) { $bytes = self::strlen($message); /** @var ParagonIE_Sodium_Core32_Int32 $x0 */ /** @var ParagonIE_Sodium_Core32_Int32 $x1 */ /** @var ParagonIE_Sodium_Core32_Int32 $x2 */ /** @var ParagonIE_Sodium_Core32_Int32 $x3 */ /** @var ParagonIE_Sodium_Core32_Int32 $x4 */ /** @var ParagonIE_Sodium_Core32_Int32 $x5 */ /** @var ParagonIE_Sodium_Core32_Int32 $x6 */ /** @var ParagonIE_Sodium_Core32_Int32 $x7 */ /** @var ParagonIE_Sodium_Core32_Int32 $x8 */ /** @var ParagonIE_Sodium_Core32_Int32 $x9 */ /** @var ParagonIE_Sodium_Core32_Int32 $x10 */ /** @var ParagonIE_Sodium_Core32_Int32 $x11 */ /** @var ParagonIE_Sodium_Core32_Int32 $x12 */ /** @var ParagonIE_Sodium_Core32_Int32 $x13 */ /** @var ParagonIE_Sodium_Core32_Int32 $x14 */ /** @var ParagonIE_Sodium_Core32_Int32 $x15 */ /* 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]; */ /** @var ParagonIE_Sodium_Core32_Int32 $j0 */ $j0 = $ctx[0]; /** @var ParagonIE_Sodium_Core32_Int32 $j1 */ $j1 = $ctx[1]; /** @var ParagonIE_Sodium_Core32_Int32 $j2 */ $j2 = $ctx[2]; /** @var ParagonIE_Sodium_Core32_Int32 $j3 */ $j3 = $ctx[3]; /** @var ParagonIE_Sodium_Core32_Int32 $j4 */ $j4 = $ctx[4]; /** @var ParagonIE_Sodium_Core32_Int32 $j5 */ $j5 = $ctx[5]; /** @var ParagonIE_Sodium_Core32_Int32 $j6 */ $j6 = $ctx[6]; /** @var ParagonIE_Sodium_Core32_Int32 $j7 */ $j7 = $ctx[7]; /** @var ParagonIE_Sodium_Core32_Int32 $j8 */ $j8 = $ctx[8]; /** @var ParagonIE_Sodium_Core32_Int32 $j9 */ $j9 = $ctx[9]; /** @var ParagonIE_Sodium_Core32_Int32 $j10 */ $j10 = $ctx[10]; /** @var ParagonIE_Sodium_Core32_Int32 $j11 */ $j11 = $ctx[11]; /** @var ParagonIE_Sodium_Core32_Int32 $j12 */ $j12 = $ctx[12]; /** @var ParagonIE_Sodium_Core32_Int32 $j13 */ $j13 = $ctx[13]; /** @var ParagonIE_Sodium_Core32_Int32 $j14 */ $j14 = $ctx[14]; /** @var ParagonIE_Sodium_Core32_Int32 $j15 */ $j15 = $ctx[15]; $c = ''; for (;;) { if ($bytes < 64) { $message .= str_repeat("\x00", 64 - $bytes); } $x0 = clone $j0; $x1 = clone $j1; $x2 = clone $j2; $x3 = clone $j3; $x4 = clone $j4; $x5 = clone $j5; $x6 = clone $j6; $x7 = clone $j7; $x8 = clone $j8; $x9 = clone $j9; $x10 = clone $j10; $x11 = clone $j11; $x12 = clone $j12; $x13 = clone $j13; $x14 = clone $j14; $x15 = clone $j15; # for (i = 20; i > 0; i -= 2) { for ($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); */ $x0 = $x0->addInt32($j0); $x1 = $x1->addInt32($j1); $x2 = $x2->addInt32($j2); $x3 = $x3->addInt32($j3); $x4 = $x4->addInt32($j4); $x5 = $x5->addInt32($j5); $x6 = $x6->addInt32($j6); $x7 = $x7->addInt32($j7); $x8 = $x8->addInt32($j8); $x9 = $x9->addInt32($j9); $x10 = $x10->addInt32($j10); $x11 = $x11->addInt32($j11); $x12 = $x12->addInt32($j12); $x13 = $x13->addInt32($j13); $x14 = $x14->addInt32($j14); $x15 = $x15->addInt32($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 = $x0->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 0, 4))); $x1 = $x1->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 4, 4))); $x2 = $x2->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 8, 4))); $x3 = $x3->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 12, 4))); $x4 = $x4->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 16, 4))); $x5 = $x5->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 20, 4))); $x6 = $x6->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 24, 4))); $x7 = $x7->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 28, 4))); $x8 = $x8->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 32, 4))); $x9 = $x9->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 36, 4))); $x10 = $x10->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 40, 4))); $x11 = $x11->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 44, 4))); $x12 = $x12->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 48, 4))); $x13 = $x13->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 52, 4))); $x14 = $x14->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 56, 4))); $x15 = $x15->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 60, 4))); /* j12 = PLUSONE(j12); if (!j12) { j13 = PLUSONE(j13); } */ /** @var ParagonIE_Sodium_Core32_Int32 $j12 */ $j12 = $j12->addInt(1); if ($j12->limbs[0] === 0 && $j12->limbs[1] === 0) { $j13 = $j13->addInt(1); } /* 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 = $x0->toReverseString() . $x1->toReverseString() . $x2->toReverseString() . $x3->toReverseString() . $x4->toReverseString() . $x5->toReverseString() . $x6->toReverseString() . $x7->toReverseString() . $x8->toReverseString() . $x9->toReverseString() . $x10->toReverseString() . $x11->toReverseString() . $x12->toReverseString() . $x13->toReverseString() . $x14->toReverseString() . $x15->toReverseString(); /* Partial block */ if ($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 = '', $key = '') { return self::encryptBytes( new ParagonIE_Sodium_Core32_ChaCha20_Ctx($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 = '', $key = '') { return self::encryptBytes( new ParagonIE_Sodium_Core32_ChaCha20_IetfCtx($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 = '', $ic = '') { return self::encryptBytes( new ParagonIE_Sodium_Core32_ChaCha20_IetfCtx($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 = '', $ic = '') { return self::encryptBytes( new ParagonIE_Sodium_Core32_ChaCha20_Ctx($key, $nonce, $ic), $message ); } }
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