<?php

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[1] Fix | Delete

if (class_exists('ParagonIE_Sodium_Core_Ed25519', false)) {

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return;

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}

[4] Fix | Delete

if (!class_exists('ParagonIE_Sodium_Core_Curve25519', false)) {

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require_once dirname(__FILE__) . '/Curve25519.php';

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}

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[8] Fix | Delete

/**

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* Class ParagonIE_Sodium_Core_Ed25519

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*/

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abstract class ParagonIE_Sodium_Core_Ed25519 extends ParagonIE_Sodium_Core_Curve25519

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{

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const KEYPAIR_BYTES = 96;

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const SEED_BYTES = 32;

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const SCALAR_BYTES = 32;

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[17] Fix | Delete

/**

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* @internal You should not use this directly from another application

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*

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* @return string (96 bytes)

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* @throws Exception

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* @throws SodiumException

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* @throws TypeError

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*/

[25] Fix | Delete

public static function keypair()

[26] Fix | Delete

{

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$seed = random_bytes(self::SEED_BYTES);

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$pk = '';

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$sk = '';

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self::seed_keypair($pk, $sk, $seed);

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return $sk . $pk;

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}

[33] Fix | Delete

[34] Fix | Delete

/**

[35] Fix | Delete

* @internal You should not use this directly from another application

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*

[37] Fix | Delete

* @param string $pk

[38] Fix | Delete

* @param string $sk

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* @param string $seed

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* @return string

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* @throws SodiumException

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* @throws TypeError

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*/

[44] Fix | Delete

public static function seed_keypair(&$pk, &$sk, $seed)

[45] Fix | Delete

{

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if (self::strlen($seed) !== self::SEED_BYTES) {

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throw new RangeException('crypto_sign keypair seed must be 32 bytes long');

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}

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[50] Fix | Delete

/** @var string $pk */

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$pk = self::publickey_from_secretkey($seed);

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$sk = $seed . $pk;

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return $sk;

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}

[55] Fix | Delete

[56] Fix | Delete

/**

[57] Fix | Delete

* @internal You should not use this directly from another application

[58] Fix | Delete

*

[59] Fix | Delete

* @param string $keypair

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* @return string

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* @throws TypeError

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*/

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public static function secretkey($keypair)

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{

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if (self::strlen($keypair) !== self::KEYPAIR_BYTES) {

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throw new RangeException('crypto_sign keypair must be 96 bytes long');

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}

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return self::substr($keypair, 0, 64);

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}

[70] Fix | Delete

[71] Fix | Delete

/**

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* @internal You should not use this directly from another application

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*

[74] Fix | Delete

* @param string $keypair

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* @return string

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* @throws TypeError

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*/

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public static function publickey($keypair)

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{

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if (self::strlen($keypair) !== self::KEYPAIR_BYTES) {

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throw new RangeException('crypto_sign keypair must be 96 bytes long');

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}

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return self::substr($keypair, 64, 32);

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}

[85] Fix | Delete

[86] Fix | Delete

/**

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* @internal You should not use this directly from another application

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*

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* @param string $sk

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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 publickey_from_secretkey($sk)

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{

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/** @var string $sk */

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$sk = hash('sha512', self::substr($sk, 0, 32), true);

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$sk[0] = self::intToChr(

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self::chrToInt($sk[0]) & 248

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);

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$sk[31] = self::intToChr(

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(self::chrToInt($sk[31]) & 63) | 64

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);

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return self::sk_to_pk($sk);

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}

[106] Fix | Delete

[107] Fix | Delete

/**

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* @param string $pk

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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 pk_to_curve25519($pk)

[114] Fix | Delete

{

[115] Fix | Delete

if (self::small_order($pk)) {

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throw new SodiumException('Public key is on a small order');

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}

[118] Fix | Delete

$A = self::ge_frombytes_negate_vartime(self::substr($pk, 0, 32));

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$p1 = self::ge_mul_l($A);

[120] Fix | Delete

if (!self::fe_isnonzero($p1->X)) {

[121] Fix | Delete

throw new SodiumException('Unexpected zero result');

[122] Fix | Delete

}

[123] Fix | Delete

[124] Fix | Delete

# fe_1(one_minus_y);

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# fe_sub(one_minus_y, one_minus_y, A.Y);

[126] Fix | Delete

# fe_invert(one_minus_y, one_minus_y);

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$one_minux_y = self::fe_invert(

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self::fe_sub(

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self::fe_1(),

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$A->Y

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)

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);

[133] Fix | Delete

[134] Fix | Delete

# fe_1(x);

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# fe_add(x, x, A.Y);

[136] Fix | Delete

# fe_mul(x, x, one_minus_y);

[137] Fix | Delete

$x = self::fe_mul(

[138] Fix | Delete

self::fe_add(self::fe_1(), $A->Y),

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$one_minux_y

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);

[141] Fix | Delete

[142] Fix | Delete

# fe_tobytes(curve25519_pk, x);

[143] Fix | Delete

return self::fe_tobytes($x);

[144] Fix | Delete

}

[145] Fix | Delete

[146] Fix | Delete

/**

[147] Fix | Delete

* @internal You should not use this directly from another application

[148] Fix | Delete

*

[149] Fix | Delete

* @param string $sk

[150] Fix | Delete

* @return string

[151] Fix | Delete

* @throws SodiumException

[152] Fix | Delete

* @throws TypeError

[153] Fix | Delete

*/

[154] Fix | Delete

public static function sk_to_pk($sk)

[155] Fix | Delete

{

[156] Fix | Delete

return self::ge_p3_tobytes(

[157] Fix | Delete

self::ge_scalarmult_base(

[158] Fix | Delete

self::substr($sk, 0, 32)

[159] Fix | Delete

)

[160] Fix | Delete

);

[161] Fix | Delete

}

[162] Fix | Delete

[163] Fix | Delete

/**

[164] Fix | Delete

* @internal You should not use this directly from another application

[165] Fix | Delete

*

[166] Fix | Delete

* @param string $message

[167] Fix | Delete

* @param string $sk

[168] Fix | Delete

* @return string

[169] Fix | Delete

* @throws SodiumException

[170] Fix | Delete

* @throws TypeError

[171] Fix | Delete

*/

[172] Fix | Delete

public static function sign($message, $sk)

[173] Fix | Delete

{

[174] Fix | Delete

/** @var string $signature */

[175] Fix | Delete

$signature = self::sign_detached($message, $sk);

[176] Fix | Delete

return $signature . $message;

[177] Fix | Delete

}

[178] Fix | Delete

[179] Fix | Delete

/**

[180] Fix | Delete

* @internal You should not use this directly from another application

[181] Fix | Delete

*

[182] Fix | Delete

* @param string $message A signed message

[183] Fix | Delete

* @param string $pk Public key

[184] Fix | Delete

* @return string Message (without signature)

[185] Fix | Delete

* @throws SodiumException

[186] Fix | Delete

* @throws TypeError

[187] Fix | Delete

*/

[188] Fix | Delete

public static function sign_open($message, $pk)

[189] Fix | Delete

{

[190] Fix | Delete

/** @var string $signature */

[191] Fix | Delete

$signature = self::substr($message, 0, 64);

[192] Fix | Delete

[193] Fix | Delete

/** @var string $message */

[194] Fix | Delete

$message = self::substr($message, 64);

[195] Fix | Delete

[196] Fix | Delete

if (self::verify_detached($signature, $message, $pk)) {

[197] Fix | Delete

return $message;

[198] Fix | Delete

}

[199] Fix | Delete

throw new SodiumException('Invalid signature');

[200] Fix | Delete

}

[201] Fix | Delete

[202] Fix | Delete

/**

[203] Fix | Delete

* @internal You should not use this directly from another application

[204] Fix | Delete

*

[205] Fix | Delete

* @param string $message

[206] Fix | Delete

* @param string $sk

[207] Fix | Delete

* @return string

[208] Fix | Delete

* @throws SodiumException

[209] Fix | Delete

* @throws TypeError

[210] Fix | Delete

*/

[211] Fix | Delete

public static function sign_detached($message, $sk)

[212] Fix | Delete

{

[213] Fix | Delete

# crypto_hash_sha512(az, sk, 32);

[214] Fix | Delete

$az = hash('sha512', self::substr($sk, 0, 32), true);

[215] Fix | Delete

[216] Fix | Delete

# az[0] &= 248;

[217] Fix | Delete

# az[31] &= 63;

[218] Fix | Delete

# az[31] |= 64;

[219] Fix | Delete

$az[0] = self::intToChr(self::chrToInt($az[0]) & 248);

[220] Fix | Delete

$az[31] = self::intToChr((self::chrToInt($az[31]) & 63) | 64);

[221] Fix | Delete

[222] Fix | Delete

# crypto_hash_sha512_init(&hs);

[223] Fix | Delete

# crypto_hash_sha512_update(&hs, az + 32, 32);

[224] Fix | Delete

# crypto_hash_sha512_update(&hs, m, mlen);

[225] Fix | Delete

# crypto_hash_sha512_final(&hs, nonce);

[226] Fix | Delete

$hs = hash_init('sha512');

[227] Fix | Delete

hash_update($hs, self::substr($az, 32, 32));

[228] Fix | Delete

hash_update($hs, $message);

[229] Fix | Delete

$nonceHash = hash_final($hs, true);

[230] Fix | Delete

[231] Fix | Delete

# memmove(sig + 32, sk + 32, 32);

[232] Fix | Delete

$pk = self::substr($sk, 32, 32);

[233] Fix | Delete

[234] Fix | Delete

# sc_reduce(nonce);

[235] Fix | Delete

# ge_scalarmult_base(&R, nonce);

[236] Fix | Delete

# ge_p3_tobytes(sig, &R);

[237] Fix | Delete

$nonce = self::sc_reduce($nonceHash) . self::substr($nonceHash, 32);

[238] Fix | Delete

$sig = self::ge_p3_tobytes(

[239] Fix | Delete

self::ge_scalarmult_base($nonce)

[240] Fix | Delete

);

[241] Fix | Delete

[242] Fix | Delete

# crypto_hash_sha512_init(&hs);

[243] Fix | Delete

# crypto_hash_sha512_update(&hs, sig, 64);

[244] Fix | Delete

# crypto_hash_sha512_update(&hs, m, mlen);

[245] Fix | Delete

# crypto_hash_sha512_final(&hs, hram);

[246] Fix | Delete

$hs = hash_init('sha512');

[247] Fix | Delete

hash_update($hs, self::substr($sig, 0, 32));

[248] Fix | Delete

hash_update($hs, self::substr($pk, 0, 32));

[249] Fix | Delete

hash_update($hs, $message);

[250] Fix | Delete

$hramHash = hash_final($hs, true);

[251] Fix | Delete

[252] Fix | Delete

# sc_reduce(hram);

[253] Fix | Delete

# sc_muladd(sig + 32, hram, az, nonce);

[254] Fix | Delete

$hram = self::sc_reduce($hramHash);

[255] Fix | Delete

$sigAfter = self::sc_muladd($hram, $az, $nonce);

[256] Fix | Delete

$sig = self::substr($sig, 0, 32) . self::substr($sigAfter, 0, 32);

[257] Fix | Delete

[258] Fix | Delete

try {

[259] Fix | Delete

ParagonIE_Sodium_Compat::memzero($az);

[260] Fix | Delete

} catch (SodiumException $ex) {

[261] Fix | Delete

$az = null;

[262] Fix | Delete

}

[263] Fix | Delete

return $sig;

[264] Fix | Delete

}

[265] Fix | Delete

[266] Fix | Delete

/**

[267] Fix | Delete

* @internal You should not use this directly from another application

[268] Fix | Delete

*

[269] Fix | Delete

* @param string $sig

[270] Fix | Delete

* @param string $message

[271] Fix | Delete

* @param string $pk

[272] Fix | Delete

* @return bool

[273] Fix | Delete

* @throws SodiumException

[274] Fix | Delete

* @throws TypeError

[275] Fix | Delete

*/

[276] Fix | Delete

public static function verify_detached($sig, $message, $pk)

[277] Fix | Delete

{

[278] Fix | Delete

if (self::strlen($sig) < 64) {

[279] Fix | Delete

throw new SodiumException('Signature is too short');

[280] Fix | Delete

}

[281] Fix | Delete

if ((self::chrToInt($sig[63]) & 240) && self::check_S_lt_L(self::substr($sig, 32, 32))) {

[282] Fix | Delete

throw new SodiumException('S < L - Invalid signature');

[283] Fix | Delete

}

[284] Fix | Delete

if (self::small_order($sig)) {

[285] Fix | Delete

throw new SodiumException('Signature is on too small of an order');

[286] Fix | Delete

}

[287] Fix | Delete

if ((self::chrToInt($sig[63]) & 224) !== 0) {

[288] Fix | Delete

throw new SodiumException('Invalid signature');

[289] Fix | Delete

}

[290] Fix | Delete

$d = 0;

[291] Fix | Delete

for ($i = 0; $i < 32; ++$i) {

[292] Fix | Delete

$d |= self::chrToInt($pk[$i]);

[293] Fix | Delete

}

[294] Fix | Delete

if ($d === 0) {

[295] Fix | Delete

throw new SodiumException('All zero public key');

[296] Fix | Delete

}

[297] Fix | Delete

[298] Fix | Delete

/** @var bool The original value of ParagonIE_Sodium_Compat::$fastMult */

[299] Fix | Delete

$orig = ParagonIE_Sodium_Compat::$fastMult;

[300] Fix | Delete

[301] Fix | Delete

// Set ParagonIE_Sodium_Compat::$fastMult to true to speed up verification.

[302] Fix | Delete

ParagonIE_Sodium_Compat::$fastMult = true;

[303] Fix | Delete

[304] Fix | Delete

/** @var ParagonIE_Sodium_Core_Curve25519_Ge_P3 $A */

[305] Fix | Delete

$A = self::ge_frombytes_negate_vartime($pk);

[306] Fix | Delete

[307] Fix | Delete

/** @var string $hDigest */

[308] Fix | Delete

$hDigest = hash(

[309] Fix | Delete

'sha512',

[310] Fix | Delete

self::substr($sig, 0, 32) .

[311] Fix | Delete

self::substr($pk, 0, 32) .

[312] Fix | Delete

$message,

[313] Fix | Delete

true

[314] Fix | Delete

);

[315] Fix | Delete

[316] Fix | Delete

/** @var string $h */

[317] Fix | Delete

$h = self::sc_reduce($hDigest) . self::substr($hDigest, 32);

[318] Fix | Delete

[319] Fix | Delete

/** @var ParagonIE_Sodium_Core_Curve25519_Ge_P2 $R */

[320] Fix | Delete

$R = self::ge_double_scalarmult_vartime(

[321] Fix | Delete

$h,

[322] Fix | Delete

$A,

[323] Fix | Delete

self::substr($sig, 32)

[324] Fix | Delete

);

[325] Fix | Delete

[326] Fix | Delete

/** @var string $rcheck */

[327] Fix | Delete

$rcheck = self::ge_tobytes($R);

[328] Fix | Delete

[329] Fix | Delete

// Reset ParagonIE_Sodium_Compat::$fastMult to what it was before.

[330] Fix | Delete

ParagonIE_Sodium_Compat::$fastMult = $orig;

[331] Fix | Delete

[332] Fix | Delete

return self::verify_32($rcheck, self::substr($sig, 0, 32));

[333] Fix | Delete

}

[334] Fix | Delete

[335] Fix | Delete

/**

[336] Fix | Delete

* @internal You should not use this directly from another application

[337] Fix | Delete

*

[338] Fix | Delete

* @param string $S

[339] Fix | Delete

* @return bool

[340] Fix | Delete

* @throws SodiumException

[341] Fix | Delete

* @throws TypeError

[342] Fix | Delete

*/

[343] Fix | Delete

public static function check_S_lt_L($S)

[344] Fix | Delete

{

[345] Fix | Delete

if (self::strlen($S) < 32) {

[346] Fix | Delete

throw new SodiumException('Signature must be 32 bytes');

[347] Fix | Delete

}

[348] Fix | Delete

$L = array(

[349] Fix | Delete

0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58,

[350] Fix | Delete

0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14,

[351] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

[352] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10

[353] Fix | Delete

);

[354] Fix | Delete

$c = 0;

[355] Fix | Delete

$n = 1;

[356] Fix | Delete

$i = 32;

[357] Fix | Delete

[358] Fix | Delete

/** @var array<int, int> $L */

[359] Fix | Delete

do {

[360] Fix | Delete

--$i;

[361] Fix | Delete

$x = self::chrToInt($S[$i]);

[362] Fix | Delete

$c |= (

[363] Fix | Delete

(($x - $L[$i]) >> 8) & $n

[364] Fix | Delete

);

[365] Fix | Delete

$n &= (

[366] Fix | Delete

(($x ^ $L[$i]) - 1) >> 8

[367] Fix | Delete

);

[368] Fix | Delete

} while ($i !== 0);

[369] Fix | Delete

[370] Fix | Delete

return $c === 0;

[371] Fix | Delete

}

[372] Fix | Delete

[373] Fix | Delete

/**

[374] Fix | Delete

* @param string $R

[375] Fix | Delete

* @return bool

[376] Fix | Delete

* @throws SodiumException

[377] Fix | Delete

* @throws TypeError

[378] Fix | Delete

*/

[379] Fix | Delete

public static function small_order($R)

[380] Fix | Delete

{

[381] Fix | Delete

/** @var array<int, array<int, int>> $blocklist */

[382] Fix | Delete

$blocklist = array(

[383] Fix | Delete

/* 0 (order 4) */

[384] Fix | Delete

array(

[385] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

[386] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

[387] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

[388] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

[389] Fix | Delete

),

[390] Fix | Delete

/* 1 (order 1) */

[391] Fix | Delete

array(

[392] Fix | Delete

0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

[393] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

[394] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

[395] Fix | Delete

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

[396] Fix | Delete

),

[397] Fix | Delete

/* 2707385501144840649318225287225658788936804267575313519463743609750303402022 (order 8) */

[398] Fix | Delete

array(

[399] Fix | Delete

0x26, 0xe8, 0x95, 0x8f, 0xc2, 0xb2, 0x27, 0xb0,

[400] Fix | Delete

0x45, 0xc3, 0xf4, 0x89, 0xf2, 0xef, 0x98, 0xf0,

[401] Fix | Delete

0xd5, 0xdf, 0xac, 0x05, 0xd3, 0xc6, 0x33, 0x39,

[402] Fix | Delete

0xb1, 0x38, 0x02, 0x88, 0x6d, 0x53, 0xfc, 0x05

[403] Fix | Delete

),

[404] Fix | Delete

/* 55188659117513257062467267217118295137698188065244968500265048394206261417927 (order 8) */

[405] Fix | Delete

array(

[406] Fix | Delete

0xc7, 0x17, 0x6a, 0x70, 0x3d, 0x4d, 0xd8, 0x4f,

[407] Fix | Delete

0xba, 0x3c, 0x0b, 0x76, 0x0d, 0x10, 0x67, 0x0f,

[408] Fix | Delete

0x2a, 0x20, 0x53, 0xfa, 0x2c, 0x39, 0xcc, 0xc6,

[409] Fix | Delete

0x4e, 0xc7, 0xfd, 0x77, 0x92, 0xac, 0x03, 0x7a

[410] Fix | Delete

),

[411] Fix | Delete

/* p-1 (order 2) */

[412] Fix | Delete

array(

[413] Fix | Delete

0x13, 0xe8, 0x95, 0x8f, 0xc2, 0xb2, 0x27, 0xb0,

[414] Fix | Delete

0x45, 0xc3, 0xf4, 0x89, 0xf2, 0xef, 0x98, 0xf0,

[415] Fix | Delete

0xd5, 0xdf, 0xac, 0x05, 0xd3, 0xc6, 0x33, 0x39,

[416] Fix | Delete

0xb1, 0x38, 0x02, 0x88, 0x6d, 0x53, 0xfc, 0x85

[417] Fix | Delete

),

[418] Fix | Delete

/* p (order 4) */

[419] Fix | Delete

array(

[420] Fix | Delete

0xb4, 0x17, 0x6a, 0x70, 0x3d, 0x4d, 0xd8, 0x4f,

[421] Fix | Delete

0xba, 0x3c, 0x0b, 0x76, 0x0d, 0x10, 0x67, 0x0f,

[422] Fix | Delete

0x2a, 0x20, 0x53, 0xfa, 0x2c, 0x39, 0xcc, 0xc6,

[423] Fix | Delete

0x4e, 0xc7, 0xfd, 0x77, 0x92, 0xac, 0x03, 0xfa

[424] Fix | Delete

),

[425] Fix | Delete

/* p+1 (order 1) */

[426] Fix | Delete

array(

[427] Fix | Delete

0xec, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[428] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[429] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[430] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f

[431] Fix | Delete

),

[432] Fix | Delete

/* p+2707385501144840649318225287225658788936804267575313519463743609750303402022 (order 8) */

[433] Fix | Delete

array(

[434] Fix | Delete

0xed, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[435] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[436] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[437] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f

[438] Fix | Delete

),

[439] Fix | Delete

/* p+55188659117513257062467267217118295137698188065244968500265048394206261417927 (order 8) */

[440] Fix | Delete

array(

[441] Fix | Delete

0xee, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[442] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[443] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[444] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f

[445] Fix | Delete

),

[446] Fix | Delete

/* 2p-1 (order 2) */

[447] Fix | Delete

array(

[448] Fix | Delete

0xd9, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[449] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[450] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[451] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff

[452] Fix | Delete

),

[453] Fix | Delete

/* 2p (order 4) */

[454] Fix | Delete

array(

[455] Fix | Delete

0xda, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[456] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[457] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[458] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff

[459] Fix | Delete

),

[460] Fix | Delete

/* 2p+1 (order 1) */

[461] Fix | Delete

array(

[462] Fix | Delete

0xdb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[463] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[464] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,

[465] Fix | Delete

0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff

[466] Fix | Delete

)

[467] Fix | Delete

);

[468] Fix | Delete

/** @var int $countBlocklist */

[469] Fix | Delete

$countBlocklist = count($blocklist);

[470] Fix | Delete

[471] Fix | Delete

for ($i = 0; $i < $countBlocklist; ++$i) {

[472] Fix | Delete

$c = 0;

[473] Fix | Delete

for ($j = 0; $j < 32; ++$j) {

[474] Fix | Delete

$c |= self::chrToInt($R[$j]) ^ (int) $blocklist[$i][$j];

[475] Fix | Delete

}

[476] Fix | Delete

if ($c === 0) {

[477] Fix | Delete

return true;

[478] Fix | Delete

}

[479] Fix | Delete

}

[480] Fix | Delete

return false;

[481] Fix | Delete

}

[482] Fix | Delete

[483] Fix | Delete

/**

[484] Fix | Delete

* @param string $s

[485] Fix | Delete

* @return string

[486] Fix | Delete

* @throws SodiumException

[487] Fix | Delete

*/

[488] Fix | Delete

public static function scalar_complement($s)

[489] Fix | Delete

{

[490] Fix | Delete

$t_ = self::L . str_repeat("\x00", 32);

[491] Fix | Delete

sodium_increment($t_);

[492] Fix | Delete

$s_ = $s . str_repeat("\x00", 32);

[493] Fix | Delete

ParagonIE_Sodium_Compat::sub($t_, $s_);

[494] Fix | Delete

return self::sc_reduce($t_);

[495] Fix | Delete

}

[496] Fix | Delete

[497] Fix | Delete

/**

[498] Fix | Delete

* @return string

[499] Fix | Delete