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cb01bbf97b
This adds a pure PHP implementation of the cryptographic functions supported in PHP 7.2+. It provides the necessary backwards compatibility required to support signature verification and other security features going forward across all supported PHP versions. Props paragoninitiativeenterprises Fixes #45806. See #39309. Built from https://develop.svn.wordpress.org/trunk@44953 git-svn-id: http://core.svn.wordpress.org/trunk@44784 1a063a9b-81f0-0310-95a4-ce76da25c4cd
401 lines
14 KiB
PHP
401 lines
14 KiB
PHP
<?php
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if (class_exists('ParagonIE_Sodium_Core32_ChaCha20', false)) {
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return;
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}
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/**
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* Class ParagonIE_Sodium_Core32_ChaCha20
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*/
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class ParagonIE_Sodium_Core32_ChaCha20 extends ParagonIE_Sodium_Core32_Util
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{
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/**
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* The ChaCha20 quarter round function. Works on four 32-bit integers.
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*
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* @internal You should not use this directly from another application
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*
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* @param ParagonIE_Sodium_Core32_Int32 $a
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* @param ParagonIE_Sodium_Core32_Int32 $b
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* @param ParagonIE_Sodium_Core32_Int32 $c
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* @param ParagonIE_Sodium_Core32_Int32 $d
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* @return array<int, ParagonIE_Sodium_Core32_Int32>
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* @throws SodiumException
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* @throws TypeError
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*/
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protected static function quarterRound(
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ParagonIE_Sodium_Core32_Int32 $a,
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ParagonIE_Sodium_Core32_Int32 $b,
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ParagonIE_Sodium_Core32_Int32 $c,
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ParagonIE_Sodium_Core32_Int32 $d
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) {
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/** @var ParagonIE_Sodium_Core32_Int32 $a */
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/** @var ParagonIE_Sodium_Core32_Int32 $b */
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/** @var ParagonIE_Sodium_Core32_Int32 $c */
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/** @var ParagonIE_Sodium_Core32_Int32 $d */
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# a = PLUS(a,b); d = ROTATE(XOR(d,a),16);
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$a = $a->addInt32($b);
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$d = $d->xorInt32($a)->rotateLeft(16);
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# c = PLUS(c,d); b = ROTATE(XOR(b,c),12);
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$c = $c->addInt32($d);
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$b = $b->xorInt32($c)->rotateLeft(12);
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# a = PLUS(a,b); d = ROTATE(XOR(d,a), 8);
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$a = $a->addInt32($b);
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$d = $d->xorInt32($a)->rotateLeft(8);
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# c = PLUS(c,d); b = ROTATE(XOR(b,c), 7);
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$c = $c->addInt32($d);
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$b = $b->xorInt32($c)->rotateLeft(7);
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return array($a, $b, $c, $d);
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}
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/**
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* @internal You should not use this directly from another application
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*
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* @param ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx
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* @param string $message
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*
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function encryptBytes(
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ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx,
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$message = ''
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) {
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$bytes = self::strlen($message);
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/** @var ParagonIE_Sodium_Core32_Int32 $x0 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x1 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x2 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x3 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x4 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x5 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x6 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x7 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x8 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x9 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x10 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x11 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x12 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x13 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x14 */
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/** @var ParagonIE_Sodium_Core32_Int32 $x15 */
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/*
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j0 = ctx->input[0];
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j1 = ctx->input[1];
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j2 = ctx->input[2];
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j3 = ctx->input[3];
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j4 = ctx->input[4];
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j5 = ctx->input[5];
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j6 = ctx->input[6];
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j7 = ctx->input[7];
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j8 = ctx->input[8];
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j9 = ctx->input[9];
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j10 = ctx->input[10];
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j11 = ctx->input[11];
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j12 = ctx->input[12];
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j13 = ctx->input[13];
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j14 = ctx->input[14];
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j15 = ctx->input[15];
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*/
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/** @var ParagonIE_Sodium_Core32_Int32 $j0 */
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$j0 = $ctx[0];
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/** @var ParagonIE_Sodium_Core32_Int32 $j1 */
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$j1 = $ctx[1];
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/** @var ParagonIE_Sodium_Core32_Int32 $j2 */
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$j2 = $ctx[2];
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/** @var ParagonIE_Sodium_Core32_Int32 $j3 */
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$j3 = $ctx[3];
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/** @var ParagonIE_Sodium_Core32_Int32 $j4 */
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$j4 = $ctx[4];
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/** @var ParagonIE_Sodium_Core32_Int32 $j5 */
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$j5 = $ctx[5];
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/** @var ParagonIE_Sodium_Core32_Int32 $j6 */
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$j6 = $ctx[6];
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/** @var ParagonIE_Sodium_Core32_Int32 $j7 */
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$j7 = $ctx[7];
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/** @var ParagonIE_Sodium_Core32_Int32 $j8 */
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$j8 = $ctx[8];
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/** @var ParagonIE_Sodium_Core32_Int32 $j9 */
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$j9 = $ctx[9];
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/** @var ParagonIE_Sodium_Core32_Int32 $j10 */
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$j10 = $ctx[10];
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/** @var ParagonIE_Sodium_Core32_Int32 $j11 */
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$j11 = $ctx[11];
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/** @var ParagonIE_Sodium_Core32_Int32 $j12 */
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$j12 = $ctx[12];
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/** @var ParagonIE_Sodium_Core32_Int32 $j13 */
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$j13 = $ctx[13];
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/** @var ParagonIE_Sodium_Core32_Int32 $j14 */
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$j14 = $ctx[14];
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/** @var ParagonIE_Sodium_Core32_Int32 $j15 */
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$j15 = $ctx[15];
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$c = '';
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for (;;) {
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if ($bytes < 64) {
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$message .= str_repeat("\x00", 64 - $bytes);
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}
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$x0 = clone $j0;
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$x1 = clone $j1;
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$x2 = clone $j2;
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$x3 = clone $j3;
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$x4 = clone $j4;
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$x5 = clone $j5;
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$x6 = clone $j6;
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$x7 = clone $j7;
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$x8 = clone $j8;
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$x9 = clone $j9;
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$x10 = clone $j10;
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$x11 = clone $j11;
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$x12 = clone $j12;
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$x13 = clone $j13;
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$x14 = clone $j14;
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$x15 = clone $j15;
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# for (i = 20; i > 0; i -= 2) {
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for ($i = 20; $i > 0; $i -= 2) {
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# QUARTERROUND( x0, x4, x8, x12)
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list($x0, $x4, $x8, $x12) = self::quarterRound($x0, $x4, $x8, $x12);
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# QUARTERROUND( x1, x5, x9, x13)
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list($x1, $x5, $x9, $x13) = self::quarterRound($x1, $x5, $x9, $x13);
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# QUARTERROUND( x2, x6, x10, x14)
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list($x2, $x6, $x10, $x14) = self::quarterRound($x2, $x6, $x10, $x14);
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# QUARTERROUND( x3, x7, x11, x15)
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list($x3, $x7, $x11, $x15) = self::quarterRound($x3, $x7, $x11, $x15);
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# QUARTERROUND( x0, x5, x10, x15)
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list($x0, $x5, $x10, $x15) = self::quarterRound($x0, $x5, $x10, $x15);
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# QUARTERROUND( x1, x6, x11, x12)
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list($x1, $x6, $x11, $x12) = self::quarterRound($x1, $x6, $x11, $x12);
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# QUARTERROUND( x2, x7, x8, x13)
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list($x2, $x7, $x8, $x13) = self::quarterRound($x2, $x7, $x8, $x13);
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# QUARTERROUND( x3, x4, x9, x14)
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list($x3, $x4, $x9, $x14) = self::quarterRound($x3, $x4, $x9, $x14);
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}
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/*
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x0 = PLUS(x0, j0);
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x1 = PLUS(x1, j1);
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x2 = PLUS(x2, j2);
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x3 = PLUS(x3, j3);
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x4 = PLUS(x4, j4);
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x5 = PLUS(x5, j5);
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x6 = PLUS(x6, j6);
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x7 = PLUS(x7, j7);
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x8 = PLUS(x8, j8);
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x9 = PLUS(x9, j9);
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x10 = PLUS(x10, j10);
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x11 = PLUS(x11, j11);
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x12 = PLUS(x12, j12);
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x13 = PLUS(x13, j13);
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x14 = PLUS(x14, j14);
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x15 = PLUS(x15, j15);
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*/
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$x0 = $x0->addInt32($j0);
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$x1 = $x1->addInt32($j1);
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$x2 = $x2->addInt32($j2);
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$x3 = $x3->addInt32($j3);
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$x4 = $x4->addInt32($j4);
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$x5 = $x5->addInt32($j5);
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$x6 = $x6->addInt32($j6);
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$x7 = $x7->addInt32($j7);
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$x8 = $x8->addInt32($j8);
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$x9 = $x9->addInt32($j9);
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$x10 = $x10->addInt32($j10);
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$x11 = $x11->addInt32($j11);
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$x12 = $x12->addInt32($j12);
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$x13 = $x13->addInt32($j13);
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$x14 = $x14->addInt32($j14);
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$x15 = $x15->addInt32($j15);
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/*
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x0 = XOR(x0, LOAD32_LE(m + 0));
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x1 = XOR(x1, LOAD32_LE(m + 4));
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x2 = XOR(x2, LOAD32_LE(m + 8));
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x3 = XOR(x3, LOAD32_LE(m + 12));
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x4 = XOR(x4, LOAD32_LE(m + 16));
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x5 = XOR(x5, LOAD32_LE(m + 20));
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x6 = XOR(x6, LOAD32_LE(m + 24));
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x7 = XOR(x7, LOAD32_LE(m + 28));
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x8 = XOR(x8, LOAD32_LE(m + 32));
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x9 = XOR(x9, LOAD32_LE(m + 36));
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x10 = XOR(x10, LOAD32_LE(m + 40));
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x11 = XOR(x11, LOAD32_LE(m + 44));
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x12 = XOR(x12, LOAD32_LE(m + 48));
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x13 = XOR(x13, LOAD32_LE(m + 52));
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x14 = XOR(x14, LOAD32_LE(m + 56));
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x15 = XOR(x15, LOAD32_LE(m + 60));
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*/
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$x0 = $x0->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 0, 4)));
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$x1 = $x1->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 4, 4)));
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$x2 = $x2->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 8, 4)));
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$x3 = $x3->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 12, 4)));
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$x4 = $x4->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 16, 4)));
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$x5 = $x5->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 20, 4)));
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$x6 = $x6->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 24, 4)));
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$x7 = $x7->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 28, 4)));
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$x8 = $x8->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 32, 4)));
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$x9 = $x9->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 36, 4)));
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$x10 = $x10->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 40, 4)));
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$x11 = $x11->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 44, 4)));
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$x12 = $x12->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 48, 4)));
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$x13 = $x13->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 52, 4)));
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$x14 = $x14->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 56, 4)));
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$x15 = $x15->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 60, 4)));
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/*
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j12 = PLUSONE(j12);
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if (!j12) {
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j13 = PLUSONE(j13);
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}
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*/
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/** @var ParagonIE_Sodium_Core32_Int32 $j12 */
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$j12 = $j12->addInt(1);
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if ($j12->limbs[0] === 0 && $j12->limbs[1] === 0) {
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$j13 = $j13->addInt(1);
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}
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/*
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STORE32_LE(c + 0, x0);
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STORE32_LE(c + 4, x1);
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STORE32_LE(c + 8, x2);
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STORE32_LE(c + 12, x3);
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STORE32_LE(c + 16, x4);
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STORE32_LE(c + 20, x5);
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STORE32_LE(c + 24, x6);
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STORE32_LE(c + 28, x7);
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STORE32_LE(c + 32, x8);
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STORE32_LE(c + 36, x9);
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STORE32_LE(c + 40, x10);
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STORE32_LE(c + 44, x11);
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STORE32_LE(c + 48, x12);
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STORE32_LE(c + 52, x13);
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STORE32_LE(c + 56, x14);
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STORE32_LE(c + 60, x15);
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*/
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$block = $x0->toReverseString() .
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$x1->toReverseString() .
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$x2->toReverseString() .
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$x3->toReverseString() .
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$x4->toReverseString() .
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$x5->toReverseString() .
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$x6->toReverseString() .
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$x7->toReverseString() .
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$x8->toReverseString() .
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$x9->toReverseString() .
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$x10->toReverseString() .
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$x11->toReverseString() .
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$x12->toReverseString() .
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$x13->toReverseString() .
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$x14->toReverseString() .
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$x15->toReverseString();
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/* Partial block */
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if ($bytes < 64) {
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$c .= self::substr($block, 0, $bytes);
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break;
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}
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/* Full block */
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$c .= $block;
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$bytes -= 64;
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if ($bytes <= 0) {
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break;
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}
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$message = self::substr($message, 64);
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}
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/* end for(;;) loop */
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$ctx[12] = $j12;
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$ctx[13] = $j13;
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return $c;
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}
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/**
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* @internal You should not use this directly from another application
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*
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* @param int $len
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* @param string $nonce
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* @param string $key
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function stream($len = 64, $nonce = '', $key = '')
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{
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return self::encryptBytes(
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new ParagonIE_Sodium_Core32_ChaCha20_Ctx($key, $nonce),
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str_repeat("\x00", $len)
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);
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}
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/**
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* @internal You should not use this directly from another application
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*
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* @param int $len
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* @param string $nonce
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* @param string $key
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function ietfStream($len, $nonce = '', $key = '')
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{
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return self::encryptBytes(
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new ParagonIE_Sodium_Core32_ChaCha20_IetfCtx($key, $nonce),
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str_repeat("\x00", $len)
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);
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}
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/**
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* @internal You should not use this directly from another application
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*
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* @param string $message
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* @param string $nonce
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* @param string $key
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* @param string $ic
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function ietfStreamXorIc($message, $nonce = '', $key = '', $ic = '')
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{
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return self::encryptBytes(
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new ParagonIE_Sodium_Core32_ChaCha20_IetfCtx($key, $nonce, $ic),
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$message
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);
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}
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/**
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* @internal You should not use this directly from another application
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*
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* @param string $message
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* @param string $nonce
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* @param string $key
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* @param string $ic
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function streamXorIc($message, $nonce = '', $key = '', $ic = '')
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{
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return self::encryptBytes(
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new ParagonIE_Sodium_Core32_ChaCha20_Ctx($key, $nonce, $ic),
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$message
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);
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}
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}
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