31 lines
1.2 KiB
JavaScript
31 lines
1.2 KiB
JavaScript
// adapted from https://github.com/apatil/pemstrip
|
|
var findProc = /Proc-Type: 4,ENCRYPTED\n\r?DEK-Info: AES-((?:128)|(?:192)|(?:256))-CBC,([0-9A-H]+)\n\r?\n\r?([0-9A-z\n\r\+\/\=]+)\n\r?/m
|
|
var startRegex = /^-----BEGIN ((?:.* KEY)|CERTIFICATE)-----\n/m
|
|
var fullRegex = /^-----BEGIN ((?:.* KEY)|CERTIFICATE)-----\n\r?([0-9A-z\n\r\+\/\=]+)\n\r?-----END \1-----$/m
|
|
var evp = require('evp_bytestokey')
|
|
var ciphers = require('browserify-aes')
|
|
module.exports = function (okey, password) {
|
|
var key = okey.toString()
|
|
var match = key.match(findProc)
|
|
var decrypted
|
|
if (!match) {
|
|
var match2 = key.match(fullRegex)
|
|
decrypted = new Buffer(match2[2].replace(/\r?\n/g, ''), 'base64')
|
|
} else {
|
|
var suite = 'aes' + match[1]
|
|
var iv = new Buffer(match[2], 'hex')
|
|
var cipherText = new Buffer(match[3].replace(/\r?\n/g, ''), 'base64')
|
|
var cipherKey = evp(password, iv.slice(0, 8), parseInt(match[1], 10)).key
|
|
var out = []
|
|
var cipher = ciphers.createDecipheriv(suite, cipherKey, iv)
|
|
out.push(cipher.update(cipherText))
|
|
out.push(cipher.final())
|
|
decrypted = Buffer.concat(out)
|
|
}
|
|
var tag = key.match(startRegex)[1]
|
|
return {
|
|
tag: tag,
|
|
data: decrypted
|
|
}
|
|
}
|