diff options
Diffstat (limited to 'vendor/paragonie/sodium_compat/src/Core/BLAKE2b.php')
-rw-r--r-- | vendor/paragonie/sodium_compat/src/Core/BLAKE2b.php | 1587 |
1 files changed, 797 insertions, 790 deletions
diff --git a/vendor/paragonie/sodium_compat/src/Core/BLAKE2b.php b/vendor/paragonie/sodium_compat/src/Core/BLAKE2b.php index 99bae98..6ad4ab7 100644 --- a/vendor/paragonie/sodium_compat/src/Core/BLAKE2b.php +++ b/vendor/paragonie/sodium_compat/src/Core/BLAKE2b.php @@ -1,790 +1,797 @@ -<?php
-
-if (class_exists('ParagonIE_Sodium_Core_BLAKE2b', false)) {
- return;
-}
-
-/**
- * Class ParagonIE_Sodium_Core_BLAKE2b
- *
- * Based on the work of Devi Mandiri in devi/salt.
- */
-abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
-{
- /**
- * @var SplFixedArray
- */
- protected static $iv;
-
- /**
- * @var array<int, array<int, int>>
- */
- protected static $sigma = array(
- array( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15),
- array( 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3),
- array( 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4),
- array( 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8),
- array( 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13),
- array( 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9),
- array( 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11),
- array( 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10),
- array( 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5),
- array( 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13 , 0),
- array( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15),
- array( 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3)
- );
-
- const BLOCKBYTES = 128;
- const OUTBYTES = 64;
- const KEYBYTES = 64;
-
- /**
- * Turn two 32-bit integers into a fixed array representing a 64-bit integer.
- *
- * @internal You should not use this directly from another application
- *
- * @param int $high
- * @param int $low
- * @return SplFixedArray
- * @psalm-suppress MixedAssignment
- */
- public static function new64($high, $low)
- {
- $i64 = new SplFixedArray(2);
- $i64[0] = $high & 0xffffffff;
- $i64[1] = $low & 0xffffffff;
- return $i64;
- }
-
- /**
- * Convert an arbitrary number into an SplFixedArray of two 32-bit integers
- * that represents a 64-bit integer.
- *
- * @internal You should not use this directly from another application
- *
- * @param int $num
- * @return SplFixedArray
- */
- protected static function to64($num)
- {
- list($hi, $lo) = self::numericTo64BitInteger($num);
- return self::new64($hi, $lo);
- }
-
- /**
- * Adds two 64-bit integers together, returning their sum as a SplFixedArray
- * containing two 32-bit integers (representing a 64-bit integer).
- *
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $x
- * @param SplFixedArray $y
- * @return SplFixedArray
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedAssignment
- * @psalm-suppress MixedOperand
- */
- protected static function add64($x, $y)
- {
- $l = ($x[1] + $y[1]) & 0xffffffff;
- return self::new64(
- (int) ($x[0] + $y[0] + (
- ($l < $x[1]) ? 1 : 0
- )),
- (int) $l
- );
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $x
- * @param SplFixedArray $y
- * @param SplFixedArray $z
- * @return SplFixedArray
- */
- protected static function add364($x, $y, $z)
- {
- return self::add64($x, self::add64($y, $z));
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $x
- * @param SplFixedArray $y
- * @return SplFixedArray
- * @throws SodiumException
- * @throws TypeError
- */
- protected static function xor64(SplFixedArray $x, SplFixedArray $y)
- {
- if (!is_numeric($x[0])) {
- throw new SodiumException('x[0] is not an integer');
- }
- if (!is_numeric($x[1])) {
- throw new SodiumException('x[1] is not an integer');
- }
- if (!is_numeric($y[0])) {
- throw new SodiumException('y[0] is not an integer');
- }
- if (!is_numeric($y[1])) {
- throw new SodiumException('y[1] is not an integer');
- }
- return self::new64(
- (int) (($x[0] ^ $y[0]) & 0xffffffff),
- (int) (($x[1] ^ $y[1]) & 0xffffffff)
- );
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $x
- * @param int $c
- * @return SplFixedArray
- * @psalm-suppress MixedAssignment
- */
- public static function rotr64($x, $c)
- {
- if ($c >= 64) {
- $c %= 64;
- }
- if ($c >= 32) {
- /** @var int $tmp */
- $tmp = $x[0];
- $x[0] = $x[1];
- $x[1] = $tmp;
- $c -= 32;
- }
- if ($c === 0) {
- return $x;
- }
-
- $l0 = 0;
- $c = 64 - $c;
-
- if ($c < 32) {
- /** @var int $h0 */
- $h0 = ((int) ($x[0]) << $c) | (
- (
- (int) ($x[1]) & ((1 << $c) - 1)
- <<
- (32 - $c)
- ) >> (32 - $c)
- );
- /** @var int $l0 */
- $l0 = (int) ($x[1]) << $c;
- } else {
- /** @var int $h0 */
- $h0 = (int) ($x[1]) << ($c - 32);
- }
-
- $h1 = 0;
- $c1 = 64 - $c;
-
- if ($c1 < 32) {
- /** @var int $h1 */
- $h1 = (int) ($x[0]) >> $c1;
- /** @var int $l1 */
- $l1 = ((int) ($x[1]) >> $c1) | ((int) ($x[0]) & ((1 << $c1) - 1)) << (32 - $c1);
- } else {
- /** @var int $l1 */
- $l1 = (int) ($x[0]) >> ($c1 - 32);
- }
-
- return self::new64($h0 | $h1, $l0 | $l1);
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $x
- * @return int
- * @psalm-suppress MixedOperand
- */
- protected static function flatten64($x)
- {
- return (int) ($x[0] * 4294967296 + $x[1]);
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $x
- * @param int $i
- * @return SplFixedArray
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedArrayOffset
- */
- protected static function load64(SplFixedArray $x, $i)
- {
- /** @var int $l */
- $l = (int) ($x[$i])
- | ((int) ($x[$i+1]) << 8)
- | ((int) ($x[$i+2]) << 16)
- | ((int) ($x[$i+3]) << 24);
- /** @var int $h */
- $h = (int) ($x[$i+4])
- | ((int) ($x[$i+5]) << 8)
- | ((int) ($x[$i+6]) << 16)
- | ((int) ($x[$i+7]) << 24);
- return self::new64($h, $l);
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $x
- * @param int $i
- * @param SplFixedArray $u
- * @return void
- * @psalm-suppress MixedAssignment
- */
- protected static function store64(SplFixedArray $x, $i, SplFixedArray $u)
- {
- $maxLength = $x->getSize() - 1;
- for ($j = 0; $j < 8; ++$j) {
- /*
- [0, 1, 2, 3, 4, 5, 6, 7]
- ... becomes ...
- [0, 0, 0, 0, 1, 1, 1, 1]
- */
- /** @var int $uIdx */
- $uIdx = ((7 - $j) & 4) >> 2;
- $x[$i] = ((int) ($u[$uIdx]) & 0xff);
- if (++$i > $maxLength) {
- return;
- }
- /** @psalm-suppress MixedOperand */
- $u[$uIdx] >>= 8;
- }
- }
-
- /**
- * This just sets the $iv static variable.
- *
- * @internal You should not use this directly from another application
- *
- * @return void
- */
- public static function pseudoConstructor()
- {
- static $called = false;
- if ($called) {
- return;
- }
- self::$iv = new SplFixedArray(8);
- self::$iv[0] = self::new64(0x6a09e667, 0xf3bcc908);
- self::$iv[1] = self::new64(0xbb67ae85, 0x84caa73b);
- self::$iv[2] = self::new64(0x3c6ef372, 0xfe94f82b);
- self::$iv[3] = self::new64(0xa54ff53a, 0x5f1d36f1);
- self::$iv[4] = self::new64(0x510e527f, 0xade682d1);
- self::$iv[5] = self::new64(0x9b05688c, 0x2b3e6c1f);
- self::$iv[6] = self::new64(0x1f83d9ab, 0xfb41bd6b);
- self::$iv[7] = self::new64(0x5be0cd19, 0x137e2179);
-
- $called = true;
- }
-
- /**
- * Returns a fresh BLAKE2 context.
- *
- * @internal You should not use this directly from another application
- *
- * @return SplFixedArray
- * @psalm-suppress MixedAssignment
- * @psalm-suppress MixedArrayAccess
- * @psalm-suppress MixedArrayAssignment
- */
- protected static function context()
- {
- $ctx = new SplFixedArray(6);
- $ctx[0] = new SplFixedArray(8); // h
- $ctx[1] = new SplFixedArray(2); // t
- $ctx[2] = new SplFixedArray(2); // f
- $ctx[3] = new SplFixedArray(256); // buf
- $ctx[4] = 0; // buflen
- $ctx[5] = 0; // last_node (uint8_t)
-
- for ($i = 8; $i--;) {
- $ctx[0][$i] = self::$iv[$i];
- }
- for ($i = 256; $i--;) {
- $ctx[3][$i] = 0;
- }
-
- $zero = self::new64(0, 0);
- $ctx[1][0] = $zero;
- $ctx[1][1] = $zero;
- $ctx[2][0] = $zero;
- $ctx[2][1] = $zero;
-
- return $ctx;
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $ctx
- * @param SplFixedArray $buf
- * @return void
- * @throws SodiumException
- * @throws TypeError
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedAssignment
- * @psalm-suppress MixedArrayAccess
- * @psalm-suppress MixedArrayAssignment
- * @psalm-suppress MixedArrayOffset
- */
- protected static function compress(SplFixedArray $ctx, SplFixedArray $buf)
- {
- $m = new SplFixedArray(16);
- $v = new SplFixedArray(16);
-
- for ($i = 16; $i--;) {
- $m[$i] = self::load64($buf, $i << 3);
- }
-
- for ($i = 8; $i--;) {
- $v[$i] = $ctx[0][$i];
- }
-
- $v[ 8] = self::$iv[0];
- $v[ 9] = self::$iv[1];
- $v[10] = self::$iv[2];
- $v[11] = self::$iv[3];
-
- $v[12] = self::xor64($ctx[1][0], self::$iv[4]);
- $v[13] = self::xor64($ctx[1][1], self::$iv[5]);
- $v[14] = self::xor64($ctx[2][0], self::$iv[6]);
- $v[15] = self::xor64($ctx[2][1], self::$iv[7]);
-
- for ($r = 0; $r < 12; ++$r) {
- $v = self::G($r, 0, 0, 4, 8, 12, $v, $m);
- $v = self::G($r, 1, 1, 5, 9, 13, $v, $m);
- $v = self::G($r, 2, 2, 6, 10, 14, $v, $m);
- $v = self::G($r, 3, 3, 7, 11, 15, $v, $m);
- $v = self::G($r, 4, 0, 5, 10, 15, $v, $m);
- $v = self::G($r, 5, 1, 6, 11, 12, $v, $m);
- $v = self::G($r, 6, 2, 7, 8, 13, $v, $m);
- $v = self::G($r, 7, 3, 4, 9, 14, $v, $m);
- }
-
- for ($i = 8; $i--;) {
- $ctx[0][$i] = self::xor64(
- $ctx[0][$i], self::xor64($v[$i], $v[$i+8])
- );
- }
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param int $r
- * @param int $i
- * @param int $a
- * @param int $b
- * @param int $c
- * @param int $d
- * @param SplFixedArray $v
- * @param SplFixedArray $m
- * @return SplFixedArray
- * @throws SodiumException
- * @throws TypeError
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedArrayOffset
- */
- public static function G($r, $i, $a, $b, $c, $d, SplFixedArray $v, SplFixedArray $m)
- {
- $v[$a] = self::add364($v[$a], $v[$b], $m[self::$sigma[$r][$i << 1]]);
- $v[$d] = self::rotr64(self::xor64($v[$d], $v[$a]), 32);
- $v[$c] = self::add64($v[$c], $v[$d]);
- $v[$b] = self::rotr64(self::xor64($v[$b], $v[$c]), 24);
- $v[$a] = self::add364($v[$a], $v[$b], $m[self::$sigma[$r][($i << 1) + 1]]);
- $v[$d] = self::rotr64(self::xor64($v[$d], $v[$a]), 16);
- $v[$c] = self::add64($v[$c], $v[$d]);
- $v[$b] = self::rotr64(self::xor64($v[$b], $v[$c]), 63);
- return $v;
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $ctx
- * @param int $inc
- * @return void
- * @throws SodiumException
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedArrayAccess
- * @psalm-suppress MixedArrayAssignment
- */
- public static function increment_counter($ctx, $inc)
- {
- if ($inc < 0) {
- throw new SodiumException('Increasing by a negative number makes no sense.');
- }
- $t = self::to64($inc);
- # S->t is $ctx[1] in our implementation
-
- # S->t[0] = ( uint64_t )( t >> 0 );
- $ctx[1][0] = self::add64($ctx[1][0], $t);
-
- # S->t[1] += ( S->t[0] < inc );
- if (self::flatten64($ctx[1][0]) < $inc) {
- $ctx[1][1] = self::add64($ctx[1][1], self::to64(1));
- }
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $ctx
- * @param SplFixedArray $p
- * @param int $plen
- * @return void
- * @throws SodiumException
- * @throws TypeError
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedAssignment
- * @psalm-suppress MixedArrayAccess
- * @psalm-suppress MixedArrayAssignment
- * @psalm-suppress MixedArrayOffset
- * @psalm-suppress MixedOperand
- */
- public static function update(SplFixedArray $ctx, SplFixedArray $p, $plen)
- {
- self::pseudoConstructor();
-
- $offset = 0;
- while ($plen > 0) {
- $left = $ctx[4];
- $fill = 256 - $left;
-
- if ($plen > $fill) {
- # memcpy( S->buf + left, in, fill ); /* Fill buffer */
- for ($i = $fill; $i--;) {
- $ctx[3][$i + $left] = $p[$i + $offset];
- }
-
- # S->buflen += fill;
- $ctx[4] += $fill;
-
- # blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES );
- self::increment_counter($ctx, 128);
-
- # blake2b_compress( S, S->buf ); /* Compress */
- self::compress($ctx, $ctx[3]);
-
- # memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, BLAKE2B_BLOCKBYTES ); /* Shift buffer left */
- for ($i = 128; $i--;) {
- $ctx[3][$i] = $ctx[3][$i + 128];
- }
-
- # S->buflen -= BLAKE2B_BLOCKBYTES;
- $ctx[4] -= 128;
-
- # in += fill;
- $offset += $fill;
-
- # inlen -= fill;
- $plen -= $fill;
- } else {
- for ($i = $plen; $i--;) {
- $ctx[3][$i + $left] = $p[$i + $offset];
- }
- $ctx[4] += $plen;
- $offset += $plen;
- $plen -= $plen;
- }
- }
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $ctx
- * @param SplFixedArray $out
- * @return SplFixedArray
- * @throws SodiumException
- * @throws TypeError
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedAssignment
- * @psalm-suppress MixedArrayAccess
- * @psalm-suppress MixedArrayAssignment
- * @psalm-suppress MixedArrayOffset
- * @psalm-suppress MixedOperand
- */
- public static function finish(SplFixedArray $ctx, SplFixedArray $out)
- {
- self::pseudoConstructor();
- if ($ctx[4] > 128) {
- self::increment_counter($ctx, 128);
- self::compress($ctx, $ctx[3]);
- $ctx[4] -= 128;
- if ($ctx[4] > 128) {
- throw new SodiumException('Failed to assert that buflen <= 128 bytes');
- }
- for ($i = $ctx[4]; $i--;) {
- $ctx[3][$i] = $ctx[3][$i + 128];
- }
- }
-
- self::increment_counter($ctx, $ctx[4]);
- $ctx[2][0] = self::new64(0xffffffff, 0xffffffff);
-
- for ($i = 256 - $ctx[4]; $i--;) {
- $ctx[3][$i+$ctx[4]] = 0;
- }
-
- self::compress($ctx, $ctx[3]);
-
- $i = (int) (($out->getSize() - 1) / 8);
- for (; $i >= 0; --$i) {
- self::store64($out, $i << 3, $ctx[0][$i]);
- }
- return $out;
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray|null $key
- * @param int $outlen
- * @param SplFixedArray|null $salt
- * @param SplFixedArray|null $personal
- * @return SplFixedArray
- * @throws SodiumException
- * @throws TypeError
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedAssignment
- * @psalm-suppress MixedArrayAccess
- * @psalm-suppress MixedArrayAssignment
- * @psalm-suppress MixedArrayOffset
- */
- public static function init(
- $key = null,
- $outlen = 64,
- $salt = null,
- $personal = null
- ) {
- self::pseudoConstructor();
- $klen = 0;
-
- if ($key !== null) {
- if (count($key) > 64) {
- throw new SodiumException('Invalid key size');
- }
- $klen = count($key);
- }
-
- if ($outlen > 64) {
- throw new SodiumException('Invalid output size');
- }
-
- $ctx = self::context();
-
- $p = new SplFixedArray(64);
- // Zero our param buffer...
- for ($i = 64; --$i;) {
- $p[$i] = 0;
- }
-
- $p[0] = $outlen; // digest_length
- $p[1] = $klen; // key_length
- $p[2] = 1; // fanout
- $p[3] = 1; // depth
-
- if ($salt instanceof SplFixedArray) {
- // salt: [32] through [47]
- for ($i = 0; $i < 16; ++$i) {
- $p[32 + $i] = (int) $salt[$i];
- }
- }
- if ($personal instanceof SplFixedArray) {
- // personal: [48] through [63]
- for ($i = 0; $i < 16; ++$i) {
- $p[48 + $i] = (int) $personal[$i];
- }
- }
-
- $ctx[0][0] = self::xor64(
- $ctx[0][0],
- self::load64($p, 0)
- );
- if ($salt instanceof SplFixedArray || $personal instanceof SplFixedArray) {
- // We need to do what blake2b_init_param() does:
- for ($i = 1; $i < 8; ++$i) {
- $ctx[0][$i] = self::xor64(
- $ctx[0][$i],
- self::load64($p, $i << 3)
- );
- }
- }
-
- if ($klen > 0 && $key instanceof SplFixedArray) {
- $block = new SplFixedArray(128);
- for ($i = 128; $i--;) {
- $block[$i] = 0;
- }
- for ($i = $klen; $i--;) {
- $block[$i] = $key[$i];
- }
- self::update($ctx, $block, 128);
- $ctx[4] = 128;
- }
-
- return $ctx;
- }
-
- /**
- * Convert a string into an SplFixedArray of integers
- *
- * @internal You should not use this directly from another application
- *
- * @param string $str
- * @return SplFixedArray
- * @psalm-suppress MixedArgumentTypeCoercion
- */
- public static function stringToSplFixedArray($str = '')
- {
- $values = unpack('C*', $str);
- return SplFixedArray::fromArray(array_values($values));
- }
-
- /**
- * Convert an SplFixedArray of integers into a string
- *
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $a
- * @return string
- * @throws TypeError
- */
- public static function SplFixedArrayToString(SplFixedArray $a)
- {
- /**
- * @var array<int, int|string> $arr
- */
- $arr = $a->toArray();
- $c = $a->count();
- array_unshift($arr, str_repeat('C', $c));
- return (string) (call_user_func_array('pack', $arr));
- }
-
- /**
- * @internal You should not use this directly from another application
- *
- * @param SplFixedArray $ctx
- * @return string
- * @throws TypeError
- * @psalm-suppress MixedArgument
- * @psalm-suppress MixedAssignment
- * @psalm-suppress MixedArrayAccess
- * @psalm-suppress MixedArrayAssignment
- * @psalm-suppress MixedArrayOffset
- * @psalm-suppress MixedMethodCall
- */
- public static function contextToString(SplFixedArray $ctx)
- {
- $str = '';
- /** @var array<int, array<int, int>> $ctxA */
- $ctxA = $ctx[0]->toArray();
-
- # uint64_t h[8];
- for ($i = 0; $i < 8; ++$i) {
- $str .= self::store32_le($ctxA[$i][1]);
- $str .= self::store32_le($ctxA[$i][0]);
- }
-
- # uint64_t t[2];
- # uint64_t f[2];
- for ($i = 1; $i < 3; ++$i) {
- $ctxA = $ctx[$i]->toArray();
- $str .= self::store32_le($ctxA[0][1]);
- $str .= self::store32_le($ctxA[0][0]);
- $str .= self::store32_le($ctxA[1][1]);
- $str .= self::store32_le($ctxA[1][0]);
- }
-
- # uint8_t buf[2 * 128];
- $str .= self::SplFixedArrayToString($ctx[3]);
-
- /** @var int $ctx4 */
- $ctx4 = (int) $ctx[4];
-
- # size_t buflen;
- $str .= implode('', array(
- self::intToChr($ctx4 & 0xff),
- self::intToChr(($ctx4 >> 8) & 0xff),
- self::intToChr(($ctx4 >> 16) & 0xff),
- self::intToChr(($ctx4 >> 24) & 0xff),
- self::intToChr(($ctx4 >> 32) & 0xff),
- self::intToChr(($ctx4 >> 40) & 0xff),
- self::intToChr(($ctx4 >> 48) & 0xff),
- self::intToChr(($ctx4 >> 56) & 0xff)
- ));
- # uint8_t last_node;
- return $str . self::intToChr($ctx[5]) . str_repeat("\x00", 23);
- }
-
- /**
- * Creates an SplFixedArray containing other SplFixedArray elements, from
- * a string (compatible with \Sodium\crypto_generichash_{init, update, final})
- *
- * @internal You should not use this directly from another application
- *
- * @param string $string
- * @return SplFixedArray
- * @throws SodiumException
- * @throws TypeError
- * @psalm-suppress MixedArrayAssignment
- */
- public static function stringToContext($string)
- {
- $ctx = self::context();
-
- # uint64_t h[8];
- for ($i = 0; $i < 8; ++$i) {
- $ctx[0][$i] = SplFixedArray::fromArray(
- array(
- self::load_4(
- self::substr($string, (($i << 3) + 4), 4)
- ),
- self::load_4(
- self::substr($string, (($i << 3) + 0), 4)
- )
- )
- );
- }
-
- # uint64_t t[2];
- # uint64_t f[2];
- for ($i = 1; $i < 3; ++$i) {
- $ctx[$i][1] = SplFixedArray::fromArray(
- array(
- self::load_4(self::substr($string, 76 + (($i - 1) << 4), 4)),
- self::load_4(self::substr($string, 72 + (($i - 1) << 4), 4))
- )
- );
- $ctx[$i][0] = SplFixedArray::fromArray(
- array(
- self::load_4(self::substr($string, 68 + (($i - 1) << 4), 4)),
- self::load_4(self::substr($string, 64 + (($i - 1) << 4), 4))
- )
- );
- }
-
- # uint8_t buf[2 * 128];
- $ctx[3] = self::stringToSplFixedArray(self::substr($string, 96, 256));
-
- # uint8_t buf[2 * 128];
- $int = 0;
- for ($i = 0; $i < 8; ++$i) {
- $int |= self::chrToInt($string[352 + $i]) << ($i << 3);
- }
- $ctx[4] = $int;
-
- return $ctx;
- }
-}
+<?php + +if (class_exists('ParagonIE_Sodium_Core_BLAKE2b', false)) { + return; +} + +/** + * Class ParagonIE_Sodium_Core_BLAKE2b + * + * Based on the work of Devi Mandiri in devi/salt. + */ +abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util +{ + /** + * @var SplFixedArray + */ + protected static $iv; + + /** + * @var array<int, array<int, int>> + */ + protected static $sigma = array( + array( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15), + array( 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3), + array( 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4), + array( 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8), + array( 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13), + array( 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9), + array( 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11), + array( 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10), + array( 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5), + array( 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13 , 0), + array( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15), + array( 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3) + ); + + const BLOCKBYTES = 128; + const OUTBYTES = 64; + const KEYBYTES = 64; + + /** + * Turn two 32-bit integers into a fixed array representing a 64-bit integer. + * + * @internal You should not use this directly from another application + * + * @param int $high + * @param int $low + * @return SplFixedArray + * @psalm-suppress MixedAssignment + */ + public static function new64($high, $low) + { + if (PHP_INT_SIZE === 4) { + throw new SodiumException("Error, use 32-bit"); + } + $i64 = new SplFixedArray(2); + $i64[0] = $high & 0xffffffff; + $i64[1] = $low & 0xffffffff; + return $i64; + } + + /** + * Convert an arbitrary number into an SplFixedArray of two 32-bit integers + * that represents a 64-bit integer. + * + * @internal You should not use this directly from another application + * + * @param int $num + * @return SplFixedArray + */ + protected static function to64($num) + { + list($hi, $lo) = self::numericTo64BitInteger($num); + return self::new64($hi, $lo); + } + + /** + * Adds two 64-bit integers together, returning their sum as a SplFixedArray + * containing two 32-bit integers (representing a 64-bit integer). + * + * @internal You should not use this directly from another application + * + * @param SplFixedArray $x + * @param SplFixedArray $y + * @return SplFixedArray + * @psalm-suppress MixedArgument + * @psalm-suppress MixedAssignment + * @psalm-suppress MixedOperand + */ + protected static function add64($x, $y) + { + if (PHP_INT_SIZE === 4) { + throw new SodiumException("Error, use 32-bit"); + } + $l = ($x[1] + $y[1]) & 0xffffffff; + return self::new64( + (int) ($x[0] + $y[0] + ( + ($l < $x[1]) ? 1 : 0 + )), + (int) $l + ); + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $x + * @param SplFixedArray $y + * @param SplFixedArray $z + * @return SplFixedArray + */ + protected static function add364($x, $y, $z) + { + return self::add64($x, self::add64($y, $z)); + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $x + * @param SplFixedArray $y + * @return SplFixedArray + * @throws SodiumException + * @throws TypeError + */ + protected static function xor64(SplFixedArray $x, SplFixedArray $y) + { + if (PHP_INT_SIZE === 4) { + throw new SodiumException("Error, use 32-bit"); + } + if (!is_numeric($x[0])) { + throw new SodiumException('x[0] is not an integer'); + } + if (!is_numeric($x[1])) { + throw new SodiumException('x[1] is not an integer'); + } + if (!is_numeric($y[0])) { + throw new SodiumException('y[0] is not an integer'); + } + if (!is_numeric($y[1])) { + throw new SodiumException('y[1] is not an integer'); + } + return self::new64( + (int) (($x[0] ^ $y[0]) & 0xffffffff), + (int) (($x[1] ^ $y[1]) & 0xffffffff) + ); + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $x + * @param int $c + * @return SplFixedArray + * @psalm-suppress MixedAssignment + */ + public static function rotr64($x, $c) + { + if (PHP_INT_SIZE === 4) { + throw new SodiumException("Error, use 32-bit"); + } + if ($c >= 64) { + $c %= 64; + } + if ($c >= 32) { + /** @var int $tmp */ + $tmp = $x[0]; + $x[0] = $x[1]; + $x[1] = $tmp; + $c -= 32; + } + if ($c === 0) { + return $x; + } + + $l0 = 0; + $c = 64 - $c; + + /** @var int $c */ + if ($c < 32) { + $h0 = ((int) ($x[0]) << $c) | ( + ( + (int) ($x[1]) & ((1 << $c) - 1) + << + (32 - $c) + ) >> (32 - $c) + ); + $l0 = (int) ($x[1]) << $c; + } else { + $h0 = (int) ($x[1]) << ($c - 32); + } + + $h1 = 0; + $c1 = 64 - $c; + + if ($c1 < 32) { + $h1 = (int) ($x[0]) >> $c1; + $l1 = ((int) ($x[1]) >> $c1) | ((int) ($x[0]) & ((1 << $c1) - 1)) << (32 - $c1); + } else { + $l1 = (int) ($x[0]) >> ($c1 - 32); + } + + return self::new64($h0 | $h1, $l0 | $l1); + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $x + * @return int + * @psalm-suppress MixedOperand + */ + protected static function flatten64($x) + { + return (int) ($x[0] * 4294967296 + $x[1]); + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $x + * @param int $i + * @return SplFixedArray + * @psalm-suppress MixedArgument + * @psalm-suppress MixedArrayOffset + */ + protected static function load64(SplFixedArray $x, $i) + { + /** @var int $l */ + $l = (int) ($x[$i]) + | ((int) ($x[$i+1]) << 8) + | ((int) ($x[$i+2]) << 16) + | ((int) ($x[$i+3]) << 24); + /** @var int $h */ + $h = (int) ($x[$i+4]) + | ((int) ($x[$i+5]) << 8) + | ((int) ($x[$i+6]) << 16) + | ((int) ($x[$i+7]) << 24); + return self::new64($h, $l); + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $x + * @param int $i + * @param SplFixedArray $u + * @return void + * @psalm-suppress MixedAssignment + */ + protected static function store64(SplFixedArray $x, $i, SplFixedArray $u) + { + $maxLength = $x->getSize() - 1; + for ($j = 0; $j < 8; ++$j) { + /* + [0, 1, 2, 3, 4, 5, 6, 7] + ... becomes ... + [0, 0, 0, 0, 1, 1, 1, 1] + */ + /** @var int $uIdx */ + $uIdx = ((7 - $j) & 4) >> 2; + $x[$i] = ((int) ($u[$uIdx]) & 0xff); + if (++$i > $maxLength) { + return; + } + /** @psalm-suppress MixedOperand */ + $u[$uIdx] >>= 8; + } + } + + /** + * This just sets the $iv static variable. + * + * @internal You should not use this directly from another application + * + * @return void + */ + public static function pseudoConstructor() + { + static $called = false; + if ($called) { + return; + } + self::$iv = new SplFixedArray(8); + self::$iv[0] = self::new64(0x6a09e667, 0xf3bcc908); + self::$iv[1] = self::new64(0xbb67ae85, 0x84caa73b); + self::$iv[2] = self::new64(0x3c6ef372, 0xfe94f82b); + self::$iv[3] = self::new64(0xa54ff53a, 0x5f1d36f1); + self::$iv[4] = self::new64(0x510e527f, 0xade682d1); + self::$iv[5] = self::new64(0x9b05688c, 0x2b3e6c1f); + self::$iv[6] = self::new64(0x1f83d9ab, 0xfb41bd6b); + self::$iv[7] = self::new64(0x5be0cd19, 0x137e2179); + + $called = true; + } + + /** + * Returns a fresh BLAKE2 context. + * + * @internal You should not use this directly from another application + * + * @return SplFixedArray + * @psalm-suppress MixedAssignment + * @psalm-suppress MixedArrayAccess + * @psalm-suppress MixedArrayAssignment + */ + protected static function context() + { + $ctx = new SplFixedArray(6); + $ctx[0] = new SplFixedArray(8); // h + $ctx[1] = new SplFixedArray(2); // t + $ctx[2] = new SplFixedArray(2); // f + $ctx[3] = new SplFixedArray(256); // buf + $ctx[4] = 0; // buflen + $ctx[5] = 0; // last_node (uint8_t) + + for ($i = 8; $i--;) { + $ctx[0][$i] = self::$iv[$i]; + } + for ($i = 256; $i--;) { + $ctx[3][$i] = 0; + } + + $zero = self::new64(0, 0); + $ctx[1][0] = $zero; + $ctx[1][1] = $zero; + $ctx[2][0] = $zero; + $ctx[2][1] = $zero; + + return $ctx; + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $ctx + * @param SplFixedArray $buf + * @return void + * @throws SodiumException + * @throws TypeError + * @psalm-suppress MixedArgument + * @psalm-suppress MixedAssignment + * @psalm-suppress MixedArrayAccess + * @psalm-suppress MixedArrayAssignment + * @psalm-suppress MixedArrayOffset + */ + protected static function compress(SplFixedArray $ctx, SplFixedArray $buf) + { + $m = new SplFixedArray(16); + $v = new SplFixedArray(16); + + for ($i = 16; $i--;) { + $m[$i] = self::load64($buf, $i << 3); + } + + for ($i = 8; $i--;) { + $v[$i] = $ctx[0][$i]; + } + + $v[ 8] = self::$iv[0]; + $v[ 9] = self::$iv[1]; + $v[10] = self::$iv[2]; + $v[11] = self::$iv[3]; + + $v[12] = self::xor64($ctx[1][0], self::$iv[4]); + $v[13] = self::xor64($ctx[1][1], self::$iv[5]); + $v[14] = self::xor64($ctx[2][0], self::$iv[6]); + $v[15] = self::xor64($ctx[2][1], self::$iv[7]); + + for ($r = 0; $r < 12; ++$r) { + $v = self::G($r, 0, 0, 4, 8, 12, $v, $m); + $v = self::G($r, 1, 1, 5, 9, 13, $v, $m); + $v = self::G($r, 2, 2, 6, 10, 14, $v, $m); + $v = self::G($r, 3, 3, 7, 11, 15, $v, $m); + $v = self::G($r, 4, 0, 5, 10, 15, $v, $m); + $v = self::G($r, 5, 1, 6, 11, 12, $v, $m); + $v = self::G($r, 6, 2, 7, 8, 13, $v, $m); + $v = self::G($r, 7, 3, 4, 9, 14, $v, $m); + } + + for ($i = 8; $i--;) { + $ctx[0][$i] = self::xor64( + $ctx[0][$i], self::xor64($v[$i], $v[$i+8]) + ); + } + } + + /** + * @internal You should not use this directly from another application + * + * @param int $r + * @param int $i + * @param int $a + * @param int $b + * @param int $c + * @param int $d + * @param SplFixedArray $v + * @param SplFixedArray $m + * @return SplFixedArray + * @throws SodiumException + * @throws TypeError + * @psalm-suppress MixedArgument + * @psalm-suppress MixedArrayOffset + */ + public static function G($r, $i, $a, $b, $c, $d, SplFixedArray $v, SplFixedArray $m) + { + $v[$a] = self::add364($v[$a], $v[$b], $m[self::$sigma[$r][$i << 1]]); + $v[$d] = self::rotr64(self::xor64($v[$d], $v[$a]), 32); + $v[$c] = self::add64($v[$c], $v[$d]); + $v[$b] = self::rotr64(self::xor64($v[$b], $v[$c]), 24); + $v[$a] = self::add364($v[$a], $v[$b], $m[self::$sigma[$r][($i << 1) + 1]]); + $v[$d] = self::rotr64(self::xor64($v[$d], $v[$a]), 16); + $v[$c] = self::add64($v[$c], $v[$d]); + $v[$b] = self::rotr64(self::xor64($v[$b], $v[$c]), 63); + return $v; + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $ctx + * @param int $inc + * @return void + * @throws SodiumException + * @psalm-suppress MixedArgument + * @psalm-suppress MixedArrayAccess + * @psalm-suppress MixedArrayAssignment + */ + public static function increment_counter($ctx, $inc) + { + if ($inc < 0) { + throw new SodiumException('Increasing by a negative number makes no sense.'); + } + $t = self::to64($inc); + # S->t is $ctx[1] in our implementation + + # S->t[0] = ( uint64_t )( t >> 0 ); + $ctx[1][0] = self::add64($ctx[1][0], $t); + + # S->t[1] += ( S->t[0] < inc ); + if (self::flatten64($ctx[1][0]) < $inc) { + $ctx[1][1] = self::add64($ctx[1][1], self::to64(1)); + } + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $ctx + * @param SplFixedArray $p + * @param int $plen + * @return void + * @throws SodiumException + * @throws TypeError + * @psalm-suppress MixedArgument + * @psalm-suppress MixedAssignment + * @psalm-suppress MixedArrayAccess + * @psalm-suppress MixedArrayAssignment + * @psalm-suppress MixedArrayOffset + * @psalm-suppress MixedOperand + */ + public static function update(SplFixedArray $ctx, SplFixedArray $p, $plen) + { + self::pseudoConstructor(); + + $offset = 0; + while ($plen > 0) { + $left = $ctx[4]; + $fill = 256 - $left; + + if ($plen > $fill) { + # memcpy( S->buf + left, in, fill ); /* Fill buffer */ + for ($i = $fill; $i--;) { + $ctx[3][$i + $left] = $p[$i + $offset]; + } + + # S->buflen += fill; + $ctx[4] += $fill; + + # blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES ); + self::increment_counter($ctx, 128); + + # blake2b_compress( S, S->buf ); /* Compress */ + self::compress($ctx, $ctx[3]); + + # memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, BLAKE2B_BLOCKBYTES ); /* Shift buffer left */ + for ($i = 128; $i--;) { + $ctx[3][$i] = $ctx[3][$i + 128]; + } + + # S->buflen -= BLAKE2B_BLOCKBYTES; + $ctx[4] -= 128; + + # in += fill; + $offset += $fill; + + # inlen -= fill; + $plen -= $fill; + } else { + for ($i = $plen; $i--;) { + $ctx[3][$i + $left] = $p[$i + $offset]; + } + $ctx[4] += $plen; + $offset += $plen; + $plen -= $plen; + } + } + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $ctx + * @param SplFixedArray $out + * @return SplFixedArray + * @throws SodiumException + * @throws TypeError + * @psalm-suppress MixedArgument + * @psalm-suppress MixedAssignment + * @psalm-suppress MixedArrayAccess + * @psalm-suppress MixedArrayAssignment + * @psalm-suppress MixedArrayOffset + * @psalm-suppress MixedOperand + */ + public static function finish(SplFixedArray $ctx, SplFixedArray $out) + { + self::pseudoConstructor(); + if ($ctx[4] > 128) { + self::increment_counter($ctx, 128); + self::compress($ctx, $ctx[3]); + $ctx[4] -= 128; + if ($ctx[4] > 128) { + throw new SodiumException('Failed to assert that buflen <= 128 bytes'); + } + for ($i = $ctx[4]; $i--;) { + $ctx[3][$i] = $ctx[3][$i + 128]; + } + } + + self::increment_counter($ctx, $ctx[4]); + $ctx[2][0] = self::new64(0xffffffff, 0xffffffff); + + for ($i = 256 - $ctx[4]; $i--;) { + $ctx[3][$i+$ctx[4]] = 0; + } + + self::compress($ctx, $ctx[3]); + + $i = (int) (($out->getSize() - 1) / 8); + for (; $i >= 0; --$i) { + self::store64($out, $i << 3, $ctx[0][$i]); + } + return $out; + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray|null $key + * @param int $outlen + * @param SplFixedArray|null $salt + * @param SplFixedArray|null $personal + * @return SplFixedArray + * @throws SodiumException + * @throws TypeError + * @psalm-suppress MixedArgument + * @psalm-suppress MixedAssignment + * @psalm-suppress MixedArrayAccess + * @psalm-suppress MixedArrayAssignment + * @psalm-suppress MixedArrayOffset + */ + public static function init( + $key = null, + $outlen = 64, + $salt = null, + $personal = null + ) { + self::pseudoConstructor(); + $klen = 0; + + if ($key !== null) { + if (count($key) > 64) { + throw new SodiumException('Invalid key size'); + } + $klen = count($key); + } + + if ($outlen > 64) { + throw new SodiumException('Invalid output size'); + } + + $ctx = self::context(); + + $p = new SplFixedArray(64); + // Zero our param buffer... + for ($i = 64; --$i;) { + $p[$i] = 0; + } + + $p[0] = $outlen; // digest_length + $p[1] = $klen; // key_length + $p[2] = 1; // fanout + $p[3] = 1; // depth + + if ($salt instanceof SplFixedArray) { + // salt: [32] through [47] + for ($i = 0; $i < 16; ++$i) { + $p[32 + $i] = (int) $salt[$i]; + } + } + if ($personal instanceof SplFixedArray) { + // personal: [48] through [63] + for ($i = 0; $i < 16; ++$i) { + $p[48 + $i] = (int) $personal[$i]; + } + } + + $ctx[0][0] = self::xor64( + $ctx[0][0], + self::load64($p, 0) + ); + if ($salt instanceof SplFixedArray || $personal instanceof SplFixedArray) { + // We need to do what blake2b_init_param() does: + for ($i = 1; $i < 8; ++$i) { + $ctx[0][$i] = self::xor64( + $ctx[0][$i], + self::load64($p, $i << 3) + ); + } + } + + if ($klen > 0 && $key instanceof SplFixedArray) { + $block = new SplFixedArray(128); + for ($i = 128; $i--;) { + $block[$i] = 0; + } + for ($i = $klen; $i--;) { + $block[$i] = $key[$i]; + } + self::update($ctx, $block, 128); + $ctx[4] = 128; + } + + return $ctx; + } + + /** + * Convert a string into an SplFixedArray of integers + * + * @internal You should not use this directly from another application + * + * @param string $str + * @return SplFixedArray + * @psalm-suppress MixedArgumentTypeCoercion + */ + public static function stringToSplFixedArray($str = '') + { + $values = unpack('C*', $str); + return SplFixedArray::fromArray(array_values($values)); + } + + /** + * Convert an SplFixedArray of integers into a string + * + * @internal You should not use this directly from another application + * + * @param SplFixedArray $a + * @return string + * @throws TypeError + */ + public static function SplFixedArrayToString(SplFixedArray $a) + { + /** + * @var array<int, int|string> $arr + */ + $arr = $a->toArray(); + $c = $a->count(); + array_unshift($arr, str_repeat('C', $c)); + return (string) (call_user_func_array('pack', $arr)); + } + + /** + * @internal You should not use this directly from another application + * + * @param SplFixedArray $ctx + * @return string + * @throws TypeError + * @psalm-suppress MixedArgument + * @psalm-suppress MixedAssignment + * @psalm-suppress MixedArrayAccess + * @psalm-suppress MixedArrayAssignment + * @psalm-suppress MixedArrayOffset + * @psalm-suppress MixedMethodCall + */ + public static function contextToString(SplFixedArray $ctx) + { + $str = ''; + /** @var array<int, array<int, int>> $ctxA */ + $ctxA = $ctx[0]->toArray(); + + # uint64_t h[8]; + for ($i = 0; $i < 8; ++$i) { + $str .= self::store32_le($ctxA[$i][1]); + $str .= self::store32_le($ctxA[$i][0]); + } + + # uint64_t t[2]; + # uint64_t f[2]; + for ($i = 1; $i < 3; ++$i) { + $ctxA = $ctx[$i]->toArray(); + $str .= self::store32_le($ctxA[0][1]); + $str .= self::store32_le($ctxA[0][0]); + $str .= self::store32_le($ctxA[1][1]); + $str .= self::store32_le($ctxA[1][0]); + } + + # uint8_t buf[2 * 128]; + $str .= self::SplFixedArrayToString($ctx[3]); + + /** @var int $ctx4 */ + $ctx4 = (int) $ctx[4]; + + # size_t buflen; + $str .= implode('', array( + self::intToChr($ctx4 & 0xff), + self::intToChr(($ctx4 >> 8) & 0xff), + self::intToChr(($ctx4 >> 16) & 0xff), + self::intToChr(($ctx4 >> 24) & 0xff), + self::intToChr(($ctx4 >> 32) & 0xff), + self::intToChr(($ctx4 >> 40) & 0xff), + self::intToChr(($ctx4 >> 48) & 0xff), + self::intToChr(($ctx4 >> 56) & 0xff) + )); + # uint8_t last_node; + return $str . self::intToChr($ctx[5]) . str_repeat("\x00", 23); + } + + /** + * Creates an SplFixedArray containing other SplFixedArray elements, from + * a string (compatible with \Sodium\crypto_generichash_{init, update, final}) + * + * @internal You should not use this directly from another application + * + * @param string $string + * @return SplFixedArray + * @throws SodiumException + * @throws TypeError + * @psalm-suppress MixedArrayAssignment + */ + public static function stringToContext($string) + { + $ctx = self::context(); + + # uint64_t h[8]; + for ($i = 0; $i < 8; ++$i) { + $ctx[0][$i] = SplFixedArray::fromArray( + array( + self::load_4( + self::substr($string, (($i << 3) + 4), 4) + ), + self::load_4( + self::substr($string, (($i << 3) + 0), 4) + ) + ) + ); + } + + # uint64_t t[2]; + # uint64_t f[2]; + for ($i = 1; $i < 3; ++$i) { + $ctx[$i][1] = SplFixedArray::fromArray( + array( + self::load_4(self::substr($string, 76 + (($i - 1) << 4), 4)), + self::load_4(self::substr($string, 72 + (($i - 1) << 4), 4)) + ) + ); + $ctx[$i][0] = SplFixedArray::fromArray( + array( + self::load_4(self::substr($string, 68 + (($i - 1) << 4), 4)), + self::load_4(self::substr($string, 64 + (($i - 1) << 4), 4)) + ) + ); + } + + # uint8_t buf[2 * 128]; + $ctx[3] = self::stringToSplFixedArray(self::substr($string, 96, 256)); + + # uint8_t buf[2 * 128]; + $int = 0; + for ($i = 0; $i < 8; ++$i) { + $int |= self::chrToInt($string[352 + $i]) << ($i << 3); + } + $ctx[4] = $int; + + return $ctx; + } +} |