You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
1.2 KiB
32 lines
1.2 KiB
4 years ago
|
// 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]+([0-9A-z\n\r+/=]+)[\n\r]+/m
|
||
|
|
var startRegex = /^-----BEGIN ((?:.*? KEY)|CERTIFICATE)-----/m
|
||
|
|
var fullRegex = /^-----BEGIN ((?:.*? KEY)|CERTIFICATE)-----([0-9A-z\n\r+/=]+)-----END \1-----$/m
|
||
|
|
var evp = require('evp_bytestokey')
|
||
|
|
var ciphers = require('browserify-aes')
|
||
|
|
var Buffer = require('safe-buffer').Buffer
|
||
|
|
module.exports = function (okey, password) {
|
||
|
|
var key = okey.toString()
|
||
|
|
var match = key.match(findProc)
|
||
|
|
var decrypted
|
||
|
|
if (!match) {
|
||
|
|
var match2 = key.match(fullRegex)
|
||
|
|
decrypted = Buffer.from(match2[2].replace(/[\r\n]/g, ''), 'base64')
|
||
|
|
} else {
|
||
|
|
var suite = 'aes' + match[1]
|
||
|
|
var iv = Buffer.from(match[2], 'hex')
|
||
|
|
var cipherText = Buffer.from(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
|
||
|
|
}
|
||
|
|
}
|