GIF89a=( õ' 7IAXKgNgYvYx\%wh…hŽth%ˆs%—x¨}9®Œ©€&©‰%¶†(¹–.¹5·œD¹&Çš)ÇŸ5ǘ;Í£*È¡&Õ²)ׯ7×µ<Ñ»4ï°3ø‘HÖ§KͯT÷¨Yÿšqÿ»qÿÔFØ !ù ' !ÿ NETSCAPE2.0 , =( þÀ“pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§gª«ªE¯°¨¬ª±²Œ¹º¹E¾­”´ÂB¶¯ §Åȸ»ÑD¾¿Á•ÄÅ®° ÝH¾ÒLÀÆDÙ«D¶BÝïðÀ¾DÑÑÔTÌÍíH òGö¨A RÎڐ |¥ ٭&ºìE8œ¹kGÔAÞpx­a¶­ã R2XB®åE8I€Õ6Xî:vT)äžþÀq¦è³¥ì仕F~%xñ  4#ZÔ‰O|-4Bs‘X:= QÉ œš lºÒyXJŠGȦ|s hÏíK–3l7·B|¥$'7Jީܪ‰‡àá”Dæn=Pƒ ¤Òëí‰`䌨ljóá¯Éüv>á–Á¼5 ½.69ûϸd«­ºÀûnlv©‹ªîf{¬ÜãPbŸ  l5‘Ž¯pß ´ ˜3aÅùäI«O’ý·‘áÞ‡˜¾Æ‚ÙÏiÇÿ‹Àƒ #öó)pâš Þ½ ‘Ý{ó)vmÞü%D~ 6f s}ŃƒDØW Eþ`‡þ À…L8xá†ç˜{)x`X/> Ì}mø‚–RØ‘*|`D=‚Ø_ ^ð5 !_…'aä“OÚ—7âcð`D”Cx`ÝÂ¥ä‹éY¹—F¼¤¥Š?¡Õ™ n@`} lď’ÄÉ@4>ñd œ à‘vÒxNÃ×™@žd=ˆgsžG±æ ´²æud &p8Qñ)ˆ«lXD©øÜéAžHìySun jª×k*D¤LH] †¦§C™Jä–´Xb~ʪwStŽ6K,°£qÁœ:9ت:¨þªl¨@¡`‚ûÚ ».Û¬¯t‹ÆSÉ[:°=Š‹„‘Nåû”Ìî{¿ÂA ‡Rà›ÀÙ6úë°Ÿð0Ä_ ½;ÃϱîÉì^ÇÛÇ#Ëë¼ôº!±Ä˜íUîÅÇ;0L1óÁµö«p% AÀºU̬ݵ¼á%霼€‡¯Á~`ÏG¯»À× ­²± =4ªnpð3¾¤³¯­ü¾¦îuÙuµÙ®|%2ÊIÿür¦#0·ÔJ``8È@S@5ê¢ ö×Þ^`8EÜ]ý.뜃Âç 7 ú ȉÞj œ½Dç zý¸iþœÑÙûÄë!ˆÞÀl§Ïw‹*DçI€nEX¯¬¼ &A¬Go¼QföõFç°¯;é¦÷îŽêJ°îúôF5¡ÌQ|îúöXªæ»TÁÏyñêï]ê² o óÎC=öõ›ÒÓPB@ D×½œä(>èCÂxŽ`±«Ÿ–JЀ»Û á¤±p+eE0`ëŽ`A Ú/NE€Ø†À9‚@¤à H½7”à‡%B‰`Àl*ƒó‘–‡8 2ñ%¸ —€:Ù1Á‰E¸àux%nP1ð!‘ðC)¾P81lÑɸF#ˆ€{´âé°ÈB„0>±û °b¡Š´±O‚3È–Ù()yRpbµ¨E.Z‘D8ÊH@% òŒx+%Ù˜Æcü »¸˜fõ¬b·d`Fê™8èXH"ÉÈ-±|1Ô6iI, 2““¬$+](A*jÐ QTÂo‰.ÛU슬Œã„Ž`¯SN¡–¶Äåyše¯ª’­¬‚´b¦Éož œ)åyâ@Ì®3 ÎtT̉°&Ø+žLÀf"Ø-|žçÔ>‡Ðv¦Ðžì\‚ Q1)Ž@Žh#aP72”ˆ™¨$‚ !ù " , =( …7IAXG]KgNgYvYxR"k\%w]'}hŽth%ˆg+ˆs%—r.—m3šx3˜x¨}9®€&©€+¨‡7§‰%¶†(¹–.¹œD¹&ǘ;Í•&ײ)×»4ïÌ6ò§KÍ þ@‘pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g «¬ E ±± ¨­¶°ººE Á´”·®C¬²§Ç¶Œ»ÓDÃÕƷ¯Ê±H½ºM×ÁGÚ¬D¶BËÁ½î½DÓôTÏÛßîG»ôõC×CÌ l&âž:'òtU³6ɹ#·Ø)€'Ü.6±&ëÍÈ» K(8p0N?!æ2"ÛˆNIJX>R¼ÐO‚M '¡¨2¸*Ÿþ>#n↠å@‚<[:¡Iïf’ ¤TÚ˘CdbÜÙ“[«ŽEú5MBo¤×@€`@„€Êt W-3 ¶Ÿ¡BíêäjIÝ…Eò9[T…$íêﯧ„…•s»Óȳ¹€ÅÚdc®UUρ#±Ùïldj?´í¼²`\ŽÁðÞu|3'ÖŒ]ë6 ¶S#²‡˜FKLÈ *N E´‘áäŠ$˜›eÄYD„ºq«.è촁ƒs \-ÔjA 9²õ÷å- üúM[Âx(ís÷ì®x€|í¡Ù’p¦‚ ŽkÛTÇDpE@WÜ ²Ç]kŠ1¨ þ€·Yb ÓÁ‰l°*n0 ç™—žzBdОu¾7ĉBl€â‰-ºx~|UåU‰  h*Hœ|e"#"?vpÄiŠe6^ˆ„+qâŠm8 #VÇá ‘å–ÄV„œ|Šè•m"сœn|@›U¶ÆΞ—Špb¥G¨ED”€±Úê2FÌIç? >Éxå Œ± ¡¤„%‘žjŸ‘ꄯ<Ìaà9ijÐ2˜D¦È&›†Z`‚å]wþ¼Â:ç6àB¤7eFJ|õÒ§Õ,¨äàFÇ®cS·Ê¶+B°,‘Þ˜ºNûãØ>PADÌHD¹æž«ÄÀnÌ¥}­#Ë’ë QÀÉSÌÂÇ2ÌXÀ{æk²lQÁ2«ÊðÀ¯w|2Í h‹ÄÂG€,m¾¶ë3ÐÙ6-´ÅE¬L°ÆIij*K½ÀÇqï`DwVÍQXœÚÔpeœ±¬Ñ q˜§Tœ½µƒ°Œìu Â<¶aØ*At¯lmEØ ü ôÛN[P1ÔÛ¦­±$ÜÆ@`ùåDpy¶yXvCAyåB`ŽD¶ 0QwG#¯ æš[^Äþ $ÀÓÝǦ{„L™[±úKÄgÌ;ï£S~¹ìGX.ôgoT.»åˆ°ùŸûù¡?1zö¦Ÿž:ÅgÁ|ìL¹ „®£œŠ‚à0œ]PÁ^p F<"•ç?!,ñ‡N4—…PÄ Á„ö¨Û:Tè@hÀ‹%táÿ:ø-žI<`þ‹p I….)^ 40D#p@ƒj4–؀:²‰1Øâr˜¼F2oW¼#Z†;$Q q” ‘ ÂK¦ñNl#29 !’F@¥Bh·ᏀL!—XFóLH‘Kh¤.«hE&JòG¨¥<™WN!€ÑÙÚˆY„@†>Œž19J" 2,/ &.GXB%ÌRÈ9B6¹W]’î×ÔW¥’IÎ$ ñ‹ÓŒE8YÆ ¼³™ñA5“à®Q.aŸB€&Ø©³ JÁ—! ¦t)K%tœ-¦JF bòNMxLôþ)ÐR¸Ð™‘ èÝ6‘O!THÌ„HÛ ‰ !ù ) , =( …AXKgNgYvYxR"k\%wh…hŽh%ˆg+ˆs%—r.—x3˜x¨}9®€&©€+¨Œ,©‡7§‰%¶†(¹–.¹5·&Çš)ǘ;Í•&×£*Ȳ)ׯ7×»4ï°3øÌ6ò‘HÖ§KÍ»Hó¯T÷¨Yÿ»qÿÇhÿ þÀ”pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g ª« E$±²¨ª­ · °²½$E$ÂÕ««D· Í ¿¦Ç¶¸ÌŒ¾³CÃÅÆ E ééH½MÛÂGâªD­ çBêêϾD²ÒaÀà€Š1r­ðÓ¤ ÔožzU!L˜C'¾yW½UGtäÇïÙllê0×àÂuGþ)AÀs[þ·xì ÁxO%ƒûX2ó—  P£n›R/¡ÑšHše+êDm?# —‘Ç£6¡8íJ¡ŸâDiäªM¥Ö„ôj“¬¹£5oQ7°- <‡ *´lãÓŒ2r/a!l)dÈ A™ÈE¢ôÔ͆…ð ;Ö˜c ¡%ß‚’Ùˆâ¸b½—pe~C"BíëÚHïeF2§æŠ8qb t_`urŠeü wÅu3êæPv§h•"ß`íÍxçLĹÜÖ3á  ~Öº“®›¸ÏMDfJÙ °„ÛµáWõ%§œ‚à©–‚X Ó؁)@®Ñ›Eþ´wëuÅSxb8y\mÖzœ¥§ZbºE—ÂLªÌw!y(>¡™wú=Ç|ÅÝs¢d €CÁW)HÜcC$€L Ä7„r.á\{)@ð` @ äXÈ$PD” `šaG:§æˆOˆ72EÐamn]ù"ŒcÊxÑŒ° &dR8`g«iÙŸLR!¦P …d’ä¡“¦ðÎTƒ¦ià|À _ ¥ Qi#¦Šg›Æ ›noMµ ›V ã£)p ç£ÎW…š=Âeªk§†j„ ´®1ß²sÉxéW«jšl|0¯B0Û, \jÛ´›6±¬¶C ÛíWþï|ëÙ‹¸ñzĸV {ì;Ýñn¼òVˆm³I¼³.Ðã¤PN¥ ²µ¼„µCã+¹ÍByî£Ñ¾HŸ›ëê 7ìYÆFTk¨SaoaY$Dµœìï¿Ã29RÈkt Çïfñ ÇÒ:ÀÐSp¹3ÇI¨â¥DZÄ ü9Ïýögñ½­uÔ*3)O‘˜Ö[_hv ,àî×Et Ÿé¶BH€ Õ[ü±64M@ÔSÌM7dÐl5-ÄÙU܍´©zߌ3Ô€3ž„ „ ¶ÛPô½5×g› êÚ˜kN„Ý…0Îj4€Ìë°“#{þÕ3S2çKÜ'ợlø¼Ú2K{° {Û¶?žm𸧠ËI¼nEò='êüóºè^üæÃ_Û=°óž‚ì#Oý¿Í'¡½áo..ÏYìnüñCœO±Áa¿¢Kô½o,üÄËbö²çºíï{ËC Ú— "”Ï{ËK ÍÒw„õ±Oz dÕ¨à:$ ƒô—«v»] A#ð «€¿šéz)Rx׿ˆ¥‚d``èw-îyÏf×K!ð€þ­Ð|ìPľ„=Ì`ý(f” 'Pa ¥ÐBJa%Ðâf§„%Š¡}FàáÝ×6>ÉäŠG"éŽè=ø!oŠ°^FP¼Ø©Q„ÀCÙÁ`(Ž\ÄÝ® ©Â$<n@dÄ E#ììUÒI! ‚#lù‹`k¦ÐÇ'Rró’ZýNBÈMF Í[¤+‹ðɈ-áwj¨¥þ8¾rá ,VÂh„"|½œ=×G_¦Ñ™EØ 0i*%̲˜Æda0mV‚k¾)›;„&6 p>ÓjK “¦Ç# âDÂ:ûc?:R Ó¬fÞéI-Ì“•Ã<ä=™Ï7˜3œ¨˜c2ŒW ,ˆ”8(T™P‰F¡Jhç"‚ ; 403WebShell
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Current File : /usr/lib/node_modules/npm/node_modules/sshpk/lib/formats/pkcs8.js
// Copyright 2015 Joyent, Inc.

module.exports = {
	read: read,
	readPkcs8: readPkcs8,
	write: write,
	writePkcs8: writePkcs8,

	readECDSACurve: readECDSACurve,
	writeECDSACurve: writeECDSACurve
};

var assert = require('assert-plus');
var asn1 = require('asn1');
var Buffer = require('safer-buffer').Buffer;
var algs = require('../algs');
var utils = require('../utils');
var Key = require('../key');
var PrivateKey = require('../private-key');
var pem = require('./pem');

function read(buf, options) {
	return (pem.read(buf, options, 'pkcs8'));
}

function write(key, options) {
	return (pem.write(key, options, 'pkcs8'));
}

/* Helper to read in a single mpint */
function readMPInt(der, nm) {
	assert.strictEqual(der.peek(), asn1.Ber.Integer,
	    nm + ' is not an Integer');
	return (utils.mpNormalize(der.readString(asn1.Ber.Integer, true)));
}

function readPkcs8(alg, type, der) {
	/* Private keys in pkcs#8 format have a weird extra int */
	if (der.peek() === asn1.Ber.Integer) {
		assert.strictEqual(type, 'private',
		    'unexpected Integer at start of public key');
		der.readString(asn1.Ber.Integer, true);
	}

	der.readSequence();
	var next = der.offset + der.length;

	var oid = der.readOID();
	switch (oid) {
	case '1.2.840.113549.1.1.1':
		der._offset = next;
		if (type === 'public')
			return (readPkcs8RSAPublic(der));
		else
			return (readPkcs8RSAPrivate(der));
	case '1.2.840.10040.4.1':
		if (type === 'public')
			return (readPkcs8DSAPublic(der));
		else
			return (readPkcs8DSAPrivate(der));
	case '1.2.840.10045.2.1':
		if (type === 'public')
			return (readPkcs8ECDSAPublic(der));
		else
			return (readPkcs8ECDSAPrivate(der));
	case '1.3.101.112':
		if (type === 'public') {
			return (readPkcs8EdDSAPublic(der));
		} else {
			return (readPkcs8EdDSAPrivate(der));
		}
	case '1.3.101.110':
		if (type === 'public') {
			return (readPkcs8X25519Public(der));
		} else {
			return (readPkcs8X25519Private(der));
		}
	default:
		throw (new Error('Unknown key type OID ' + oid));
	}
}

function readPkcs8RSAPublic(der) {
	// bit string sequence
	der.readSequence(asn1.Ber.BitString);
	der.readByte();
	der.readSequence();

	// modulus
	var n = readMPInt(der, 'modulus');
	var e = readMPInt(der, 'exponent');

	// now, make the key
	var key = {
		type: 'rsa',
		source: der.originalInput,
		parts: [
			{ name: 'e', data: e },
			{ name: 'n', data: n }
		]
	};

	return (new Key(key));
}

function readPkcs8RSAPrivate(der) {
	der.readSequence(asn1.Ber.OctetString);
	der.readSequence();

	var ver = readMPInt(der, 'version');
	assert.equal(ver[0], 0x0, 'unknown RSA private key version');

	// modulus then public exponent
	var n = readMPInt(der, 'modulus');
	var e = readMPInt(der, 'public exponent');
	var d = readMPInt(der, 'private exponent');
	var p = readMPInt(der, 'prime1');
	var q = readMPInt(der, 'prime2');
	var dmodp = readMPInt(der, 'exponent1');
	var dmodq = readMPInt(der, 'exponent2');
	var iqmp = readMPInt(der, 'iqmp');

	// now, make the key
	var key = {
		type: 'rsa',
		parts: [
			{ name: 'n', data: n },
			{ name: 'e', data: e },
			{ name: 'd', data: d },
			{ name: 'iqmp', data: iqmp },
			{ name: 'p', data: p },
			{ name: 'q', data: q },
			{ name: 'dmodp', data: dmodp },
			{ name: 'dmodq', data: dmodq }
		]
	};

	return (new PrivateKey(key));
}

function readPkcs8DSAPublic(der) {
	der.readSequence();

	var p = readMPInt(der, 'p');
	var q = readMPInt(der, 'q');
	var g = readMPInt(der, 'g');

	// bit string sequence
	der.readSequence(asn1.Ber.BitString);
	der.readByte();

	var y = readMPInt(der, 'y');

	// now, make the key
	var key = {
		type: 'dsa',
		parts: [
			{ name: 'p', data: p },
			{ name: 'q', data: q },
			{ name: 'g', data: g },
			{ name: 'y', data: y }
		]
	};

	return (new Key(key));
}

function readPkcs8DSAPrivate(der) {
	der.readSequence();

	var p = readMPInt(der, 'p');
	var q = readMPInt(der, 'q');
	var g = readMPInt(der, 'g');

	der.readSequence(asn1.Ber.OctetString);
	var x = readMPInt(der, 'x');

	/* The pkcs#8 format does not include the public key */
	var y = utils.calculateDSAPublic(g, p, x);

	var key = {
		type: 'dsa',
		parts: [
			{ name: 'p', data: p },
			{ name: 'q', data: q },
			{ name: 'g', data: g },
			{ name: 'y', data: y },
			{ name: 'x', data: x }
		]
	};

	return (new PrivateKey(key));
}

function readECDSACurve(der) {
	var curveName, curveNames;
	var j, c, cd;

	if (der.peek() === asn1.Ber.OID) {
		var oid = der.readOID();

		curveNames = Object.keys(algs.curves);
		for (j = 0; j < curveNames.length; ++j) {
			c = curveNames[j];
			cd = algs.curves[c];
			if (cd.pkcs8oid === oid) {
				curveName = c;
				break;
			}
		}

	} else {
		// ECParameters sequence
		der.readSequence();
		var version = der.readString(asn1.Ber.Integer, true);
		assert.strictEqual(version[0], 1, 'ECDSA key not version 1');

		var curve = {};

		// FieldID sequence
		der.readSequence();
		var fieldTypeOid = der.readOID();
		assert.strictEqual(fieldTypeOid, '1.2.840.10045.1.1',
		    'ECDSA key is not from a prime-field');
		var p = curve.p = utils.mpNormalize(
		    der.readString(asn1.Ber.Integer, true));
		/*
		 * p always starts with a 1 bit, so count the zeros to get its
		 * real size.
		 */
		curve.size = p.length * 8 - utils.countZeros(p);

		// Curve sequence
		der.readSequence();
		curve.a = utils.mpNormalize(
		    der.readString(asn1.Ber.OctetString, true));
		curve.b = utils.mpNormalize(
		    der.readString(asn1.Ber.OctetString, true));
		if (der.peek() === asn1.Ber.BitString)
			curve.s = der.readString(asn1.Ber.BitString, true);

		// Combined Gx and Gy
		curve.G = der.readString(asn1.Ber.OctetString, true);
		assert.strictEqual(curve.G[0], 0x4,
		    'uncompressed G is required');

		curve.n = utils.mpNormalize(
		    der.readString(asn1.Ber.Integer, true));
		curve.h = utils.mpNormalize(
		    der.readString(asn1.Ber.Integer, true));
		assert.strictEqual(curve.h[0], 0x1, 'a cofactor=1 curve is ' +
		    'required');

		curveNames = Object.keys(algs.curves);
		var ks = Object.keys(curve);
		for (j = 0; j < curveNames.length; ++j) {
			c = curveNames[j];
			cd = algs.curves[c];
			var equal = true;
			for (var i = 0; i < ks.length; ++i) {
				var k = ks[i];
				if (cd[k] === undefined)
					continue;
				if (typeof (cd[k]) === 'object' &&
				    cd[k].equals !== undefined) {
					if (!cd[k].equals(curve[k])) {
						equal = false;
						break;
					}
				} else if (Buffer.isBuffer(cd[k])) {
					if (cd[k].toString('binary')
					    !== curve[k].toString('binary')) {
						equal = false;
						break;
					}
				} else {
					if (cd[k] !== curve[k]) {
						equal = false;
						break;
					}
				}
			}
			if (equal) {
				curveName = c;
				break;
			}
		}
	}
	return (curveName);
}

function readPkcs8ECDSAPrivate(der) {
	var curveName = readECDSACurve(der);
	assert.string(curveName, 'a known elliptic curve');

	der.readSequence(asn1.Ber.OctetString);
	der.readSequence();

	var version = readMPInt(der, 'version');
	assert.equal(version[0], 1, 'unknown version of ECDSA key');

	var d = der.readString(asn1.Ber.OctetString, true);
	der.readSequence(0xa1);

	var Q = der.readString(asn1.Ber.BitString, true);
	Q = utils.ecNormalize(Q);

	var key = {
		type: 'ecdsa',
		parts: [
			{ name: 'curve', data: Buffer.from(curveName) },
			{ name: 'Q', data: Q },
			{ name: 'd', data: d }
		]
	};

	return (new PrivateKey(key));
}

function readPkcs8ECDSAPublic(der) {
	var curveName = readECDSACurve(der);
	assert.string(curveName, 'a known elliptic curve');

	var Q = der.readString(asn1.Ber.BitString, true);
	Q = utils.ecNormalize(Q);

	var key = {
		type: 'ecdsa',
		parts: [
			{ name: 'curve', data: Buffer.from(curveName) },
			{ name: 'Q', data: Q }
		]
	};

	return (new Key(key));
}

function readPkcs8EdDSAPublic(der) {
	if (der.peek() === 0x00)
		der.readByte();

	var A = utils.readBitString(der);

	var key = {
		type: 'ed25519',
		parts: [
			{ name: 'A', data: utils.zeroPadToLength(A, 32) }
		]
	};

	return (new Key(key));
}

function readPkcs8X25519Public(der) {
	var A = utils.readBitString(der);

	var key = {
		type: 'curve25519',
		parts: [
			{ name: 'A', data: utils.zeroPadToLength(A, 32) }
		]
	};

	return (new Key(key));
}

function readPkcs8EdDSAPrivate(der) {
	if (der.peek() === 0x00)
		der.readByte();

	der.readSequence(asn1.Ber.OctetString);
	var k = der.readString(asn1.Ber.OctetString, true);
	k = utils.zeroPadToLength(k, 32);

	var A;
	if (der.peek() === asn1.Ber.BitString) {
		A = utils.readBitString(der);
		A = utils.zeroPadToLength(A, 32);
	} else {
		A = utils.calculateED25519Public(k);
	}

	var key = {
		type: 'ed25519',
		parts: [
			{ name: 'A', data: utils.zeroPadToLength(A, 32) },
			{ name: 'k', data: utils.zeroPadToLength(k, 32) }
		]
	};

	return (new PrivateKey(key));
}

function readPkcs8X25519Private(der) {
	if (der.peek() === 0x00)
		der.readByte();

	der.readSequence(asn1.Ber.OctetString);
	var k = der.readString(asn1.Ber.OctetString, true);
	k = utils.zeroPadToLength(k, 32);

	var A = utils.calculateX25519Public(k);

	var key = {
		type: 'curve25519',
		parts: [
			{ name: 'A', data: utils.zeroPadToLength(A, 32) },
			{ name: 'k', data: utils.zeroPadToLength(k, 32) }
		]
	};

	return (new PrivateKey(key));
}

function writePkcs8(der, key) {
	der.startSequence();

	if (PrivateKey.isPrivateKey(key)) {
		var sillyInt = Buffer.from([0]);
		der.writeBuffer(sillyInt, asn1.Ber.Integer);
	}

	der.startSequence();
	switch (key.type) {
	case 'rsa':
		der.writeOID('1.2.840.113549.1.1.1');
		if (PrivateKey.isPrivateKey(key))
			writePkcs8RSAPrivate(key, der);
		else
			writePkcs8RSAPublic(key, der);
		break;
	case 'dsa':
		der.writeOID('1.2.840.10040.4.1');
		if (PrivateKey.isPrivateKey(key))
			writePkcs8DSAPrivate(key, der);
		else
			writePkcs8DSAPublic(key, der);
		break;
	case 'ecdsa':
		der.writeOID('1.2.840.10045.2.1');
		if (PrivateKey.isPrivateKey(key))
			writePkcs8ECDSAPrivate(key, der);
		else
			writePkcs8ECDSAPublic(key, der);
		break;
	case 'ed25519':
		der.writeOID('1.3.101.112');
		if (PrivateKey.isPrivateKey(key))
			throw (new Error('Ed25519 private keys in pkcs8 ' +
			    'format are not supported'));
		writePkcs8EdDSAPublic(key, der);
		break;
	default:
		throw (new Error('Unsupported key type: ' + key.type));
	}

	der.endSequence();
}

function writePkcs8RSAPrivate(key, der) {
	der.writeNull();
	der.endSequence();

	der.startSequence(asn1.Ber.OctetString);
	der.startSequence();

	var version = Buffer.from([0]);
	der.writeBuffer(version, asn1.Ber.Integer);

	der.writeBuffer(key.part.n.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.e.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.d.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.p.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.q.data, asn1.Ber.Integer);
	if (!key.part.dmodp || !key.part.dmodq)
		utils.addRSAMissing(key);
	der.writeBuffer(key.part.dmodp.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.dmodq.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.iqmp.data, asn1.Ber.Integer);

	der.endSequence();
	der.endSequence();
}

function writePkcs8RSAPublic(key, der) {
	der.writeNull();
	der.endSequence();

	der.startSequence(asn1.Ber.BitString);
	der.writeByte(0x00);

	der.startSequence();
	der.writeBuffer(key.part.n.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.e.data, asn1.Ber.Integer);
	der.endSequence();

	der.endSequence();
}

function writePkcs8DSAPrivate(key, der) {
	der.startSequence();
	der.writeBuffer(key.part.p.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.q.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.g.data, asn1.Ber.Integer);
	der.endSequence();

	der.endSequence();

	der.startSequence(asn1.Ber.OctetString);
	der.writeBuffer(key.part.x.data, asn1.Ber.Integer);
	der.endSequence();
}

function writePkcs8DSAPublic(key, der) {
	der.startSequence();
	der.writeBuffer(key.part.p.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.q.data, asn1.Ber.Integer);
	der.writeBuffer(key.part.g.data, asn1.Ber.Integer);
	der.endSequence();
	der.endSequence();

	der.startSequence(asn1.Ber.BitString);
	der.writeByte(0x00);
	der.writeBuffer(key.part.y.data, asn1.Ber.Integer);
	der.endSequence();
}

function writeECDSACurve(key, der) {
	var curve = algs.curves[key.curve];
	if (curve.pkcs8oid) {
		/* This one has a name in pkcs#8, so just write the oid */
		der.writeOID(curve.pkcs8oid);

	} else {
		// ECParameters sequence
		der.startSequence();

		var version = Buffer.from([1]);
		der.writeBuffer(version, asn1.Ber.Integer);

		// FieldID sequence
		der.startSequence();
		der.writeOID('1.2.840.10045.1.1'); // prime-field
		der.writeBuffer(curve.p, asn1.Ber.Integer);
		der.endSequence();

		// Curve sequence
		der.startSequence();
		var a = curve.p;
		if (a[0] === 0x0)
			a = a.slice(1);
		der.writeBuffer(a, asn1.Ber.OctetString);
		der.writeBuffer(curve.b, asn1.Ber.OctetString);
		der.writeBuffer(curve.s, asn1.Ber.BitString);
		der.endSequence();

		der.writeBuffer(curve.G, asn1.Ber.OctetString);
		der.writeBuffer(curve.n, asn1.Ber.Integer);
		var h = curve.h;
		if (!h) {
			h = Buffer.from([1]);
		}
		der.writeBuffer(h, asn1.Ber.Integer);

		// ECParameters
		der.endSequence();
	}
}

function writePkcs8ECDSAPublic(key, der) {
	writeECDSACurve(key, der);
	der.endSequence();

	var Q = utils.ecNormalize(key.part.Q.data, true);
	der.writeBuffer(Q, asn1.Ber.BitString);
}

function writePkcs8ECDSAPrivate(key, der) {
	writeECDSACurve(key, der);
	der.endSequence();

	der.startSequence(asn1.Ber.OctetString);
	der.startSequence();

	var version = Buffer.from([1]);
	der.writeBuffer(version, asn1.Ber.Integer);

	der.writeBuffer(key.part.d.data, asn1.Ber.OctetString);

	der.startSequence(0xa1);
	var Q = utils.ecNormalize(key.part.Q.data, true);
	der.writeBuffer(Q, asn1.Ber.BitString);
	der.endSequence();

	der.endSequence();
	der.endSequence();
}

function writePkcs8EdDSAPublic(key, der) {
	der.endSequence();

	utils.writeBitString(der, key.part.A.data);
}

function writePkcs8EdDSAPrivate(key, der) {
	der.endSequence();

	var k = utils.mpNormalize(key.part.k.data, true);
	der.startSequence(asn1.Ber.OctetString);
	der.writeBuffer(k, asn1.Ber.OctetString);
	der.endSequence();
}

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