coolaj86/eckles.js
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AJ ONeal 2018-11-19 20:18:14 -07:00
parent 1d050b5991
commit b13165d6dc
1 changed files with 47 additions and 38 deletions
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85
lib/eckles.js
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@ -1,6 +1,8 @@
'use strict';
var EC = module.exports;
var Hex = {};
var PEM = {};
// 1.2.840.10045.3.1.7
// prime256v1 (ANSI X9.62 named elliptic curve)
@ -9,36 +11,21 @@ var OBJ_ID_EC = '06 08 2A8648CE3D030107'.replace(/\s+/g, '').toLowerCase();
// secp384r1 (SECG (Certicom) named elliptic curve)
var OBJ_ID_EC_384 = '06 05 2B81040022'.replace(/\s+/g, '').toLowerCase();
// 1.2.840.10045.2.1
// ecPublicKey (ANSI X9.62 public key type)
var OBJ_ID_EC_PUB = '06 07 2A8648CE3D0201'.replace(/\s+/g, '').toLowerCase();
// The one good thing that came from the b***kchain hysteria: good EC documentation
// https://davidederosa.com/basic-blockchain-programming/elliptic-curve-keys/
var PEM = {};
PEM._toUrlSafeBase64 = function (u8) {
//console.log('Len:', u8.byteLength);
return Buffer.from(u8).toString('base64')
.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
};
function toHex(ab) {
var hex = [];
var u8 = new Uint8Array(ab);
var size = u8.byteLength;
var i;
var h;
for (i = 0; i < size; i += 1) {
h = u8[i].toString(16);
if (2 === h.length) {
hex.push(h);
} else {
hex.push('0' + h);
}
}
return hex.join('').replace(/\s+/g, '').toLowerCase();
}
Hex.fromAB = toHex;
function parsePem(pem) {
PEM.parseBlock = function pemToDer(pem) {
var typ;
var pub;
var crv;
@ -71,9 +58,29 @@ function parsePem(pem) {
}
return { typ: typ, pub: pub, der: der, crv: crv };
}
};
function parseEcOnlyPrivkey(u8, jwk) {
function toHex(ab) {
var hex = [];
var u8 = new Uint8Array(ab);
var size = u8.byteLength;
var i;
var h;
for (i = 0; i < size; i += 1) {
h = u8[i].toString(16);
if (2 === h.length) {
hex.push(h);
} else {
hex.push('0' + h);
}
}
return hex.join('').replace(/\s+/g, '').toLowerCase();
}
Hex.fromAB = toHex;
EC.parseSec1 = function parseEcOnlyPrivkey(u8, jwk) {
var index = 7;
var len = 32;
var olen = OBJ_ID_EC.length/2;
@ -111,8 +118,9 @@ function parseEcOnlyPrivkey(u8, jwk) {
, y: PEM._toUrlSafeBase64(y)
//, yh: y
};
}
function parseEcPkcs8Privkey(u8, jwk) {
};
EC.parsePkcs8 = function parseEcPkcs8(u8, jwk) {
var index = 24 + (OBJ_ID_EC.length/2);
var len = 32;
if ("P-384" === jwk.crv) {
@ -147,8 +155,9 @@ function parseEcPkcs8Privkey(u8, jwk) {
, y: PEM._toUrlSafeBase64(y)
//, yh: y
};
}
function parseEcPub(u8, jwk) {
};
EC.parseSpki = function parsePem(u8, jwk) {
var ci = 16 + OBJ_ID_EC.length/2;
var len = 32;
@ -176,16 +185,17 @@ function parseEcPub(u8, jwk) {
, y: PEM._toUrlSafeBase64(y)
//, yh: y
};
}
};
EC.parsePkix = EC.parseSpki;
/*global Promise*/
function parseEcPrivkey(opts) {
EC.parse = function parseEc(opts) {
return Promise.resolve().then(function () {
if (!opts || !opts.pem) {
throw new Error("must pass { pem: pem }");
}
var pem = opts.pem;
var u8 = parsePem(pem).der;
var u8 = PEM.parseBlock(pem).der;
var hex = toHex(u8);
var jwk = { kty: 'EC', crv: null, x: null, y: null };
@ -196,15 +206,15 @@ function parseEcPrivkey(opts) {
// PKCS8
if (0x02 === u8[3] && 0x30 === u8[6] && 0x06 === u8[8]) {
//console.log("PKCS8", u8[3].toString(16), u8[6].toString(16), u8[8].toString(16));
return parseEcPkcs8Privkey(u8, jwk);
return EC.parsePkcs8(u8, jwk);
// EC-only
} else if (0x02 === u8[2] && 0x04 === u8[5] && 0xA0 === u8[39]) {
//console.log("EC---", u8[2].toString(16), u8[5].toString(16), u8[39].toString(16));
return parseEcOnlyPrivkey(u8, jwk);
return EC.parseSec1(u8, jwk);
// SPKI/PKIK (Public)
} else if (0x30 === u8[2] && 0x06 === u8[4] && 0x06 === u8[13]) {
//console.log("SPKI-", u8[2].toString(16), u8[4].toString(16), u8[13].toString(16));
return parseEcPub(u8, jwk);
return EC.parseSpki(u8, jwk);
// Error
} else {
//console.log("PKCS8", u8[3].toString(16), u8[6].toString(16), u8[8].toString(16));
@ -218,15 +228,15 @@ function parseEcPrivkey(opts) {
// PKCS8
if (0x02 === u8[3] && 0x30 === u8[6] && 0x06 === u8[8]) {
//console.log("PKCS8", u8[3].toString(16), u8[6].toString(16), u8[8].toString(16));
return parseEcPkcs8Privkey(u8, jwk);
return EC.parsePkcs8(u8, jwk);
// EC-only
} else if (0x02 === u8[3] && 0x04 === u8[6] && 0xA0 === u8[56]) {
//console.log("EC---", u8[3].toString(16), u8[6].toString(16), u8[56].toString(16));
return parseEcOnlyPrivkey(u8, jwk);
return EC.parseSec1(u8, jwk);
// SPKI/PKIK (Public)
} else if (0x30 === u8[2] && 0x06 === u8[4] && 0x06 === u8[13]) {
//console.log("SPKI-", u8[2].toString(16), u8[4].toString(16), u8[13].toString(16));
return parseEcPub(u8, jwk);
return EC.parseSpki(u8, jwk);
// Error
} else {
//console.log("PKCS8", u8[3].toString(16), u8[6].toString(16), u8[8].toString(16));
@ -238,6 +248,5 @@ function parseEcPrivkey(opts) {
throw new Error("Supported key types are P-256 and P-384");
}
});
}
module.exports.import = parseEcPrivkey;
};
EC.toJwk = EC.import = EC.parse;