107 lines
3.6 KiB
JavaScript
107 lines
3.6 KiB
JavaScript
var asn1 = require('./asn1')
|
|
var aesid = require('./aesid.json')
|
|
var fixProc = require('./fixProc')
|
|
var ciphers = require('browserify-aes')
|
|
var compat = require('pbkdf2')
|
|
var Buffer = require('safe-buffer').Buffer
|
|
module.exports = parseKeys
|
|
|
|
function parseKeys (buffer) {
|
|
var password
|
|
if (typeof buffer === 'object' && !Buffer.isBuffer(buffer)) {
|
|
password = buffer.passphrase
|
|
buffer = buffer.key
|
|
}
|
|
if (typeof buffer === 'string') {
|
|
buffer = Buffer.from(buffer)
|
|
}
|
|
|
|
var stripped = fixProc(buffer, password)
|
|
|
|
var type = stripped.tag
|
|
var data = stripped.data
|
|
var subtype, ndata
|
|
switch (type) {
|
|
case 'CERTIFICATE':
|
|
ndata = asn1.certificate.decode(data, 'der').tbsCertificate.subjectPublicKeyInfo
|
|
// falls through
|
|
case 'PUBLIC KEY':
|
|
if (!ndata) {
|
|
ndata = asn1.PublicKey.decode(data, 'der')
|
|
}
|
|
subtype = ndata.algorithm.algorithm.join('.')
|
|
switch (subtype) {
|
|
case '1.2.840.113549.1.1.1':
|
|
return asn1.RSAPublicKey.decode(ndata.subjectPublicKey.data, 'der')
|
|
case '1.2.840.10045.2.1':
|
|
ndata.subjectPrivateKey = ndata.subjectPublicKey
|
|
return {
|
|
type: 'ec',
|
|
data: ndata
|
|
}
|
|
case '1.2.840.10040.4.1':
|
|
ndata.algorithm.params.pub_key = asn1.DSAparam.decode(ndata.subjectPublicKey.data, 'der')
|
|
return {
|
|
type: 'dsa',
|
|
data: ndata.algorithm.params
|
|
}
|
|
default: throw new Error('unknown key id ' + subtype)
|
|
}
|
|
throw new Error('unknown key type ' + type)
|
|
case 'ENCRYPTED PRIVATE KEY':
|
|
data = asn1.EncryptedPrivateKey.decode(data, 'der')
|
|
data = decrypt(data, password)
|
|
// falls through
|
|
case 'PRIVATE KEY':
|
|
ndata = asn1.PrivateKey.decode(data, 'der')
|
|
subtype = ndata.algorithm.algorithm.join('.')
|
|
switch (subtype) {
|
|
case '1.2.840.113549.1.1.1':
|
|
return asn1.RSAPrivateKey.decode(ndata.subjectPrivateKey, 'der')
|
|
case '1.2.840.10045.2.1':
|
|
return {
|
|
curve: ndata.algorithm.curve,
|
|
privateKey: asn1.ECPrivateKey.decode(ndata.subjectPrivateKey, 'der').privateKey
|
|
}
|
|
case '1.2.840.10040.4.1':
|
|
ndata.algorithm.params.priv_key = asn1.DSAparam.decode(ndata.subjectPrivateKey, 'der')
|
|
return {
|
|
type: 'dsa',
|
|
params: ndata.algorithm.params
|
|
}
|
|
default: throw new Error('unknown key id ' + subtype)
|
|
}
|
|
throw new Error('unknown key type ' + type)
|
|
case 'RSA PUBLIC KEY':
|
|
return asn1.RSAPublicKey.decode(data, 'der')
|
|
case 'RSA PRIVATE KEY':
|
|
return asn1.RSAPrivateKey.decode(data, 'der')
|
|
case 'DSA PRIVATE KEY':
|
|
return {
|
|
type: 'dsa',
|
|
params: asn1.DSAPrivateKey.decode(data, 'der')
|
|
}
|
|
case 'EC PRIVATE KEY':
|
|
data = asn1.ECPrivateKey.decode(data, 'der')
|
|
return {
|
|
curve: data.parameters.value,
|
|
privateKey: data.privateKey
|
|
}
|
|
default: throw new Error('unknown key type ' + type)
|
|
}
|
|
}
|
|
parseKeys.signature = asn1.signature
|
|
function decrypt (data, password) {
|
|
var salt = data.algorithm.decrypt.kde.kdeparams.salt
|
|
var iters = parseInt(data.algorithm.decrypt.kde.kdeparams.iters.toString(), 10)
|
|
var algo = aesid[data.algorithm.decrypt.cipher.algo.join('.')]
|
|
var iv = data.algorithm.decrypt.cipher.iv
|
|
var cipherText = data.subjectPrivateKey
|
|
var keylen = parseInt(algo.split('-')[1], 10) / 8
|
|
var key = compat.pbkdf2Sync(password, salt, iters, keylen, 'sha1')
|
|
var cipher = ciphers.createDecipheriv(algo, key, iv)
|
|
var out = []
|
|
out.push(cipher.update(cipherText))
|
|
out.push(cipher.final())
|
|
return Buffer.concat(out)
|
|
}
|