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Using 10K iteration string stretching for encryption.

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This commit is contained in:
Michael Drury 2022-02-14 21:37:40 +00:00
parent 92d457ac00
commit f04a29dfef
2 changed files with 19 additions and 12 deletions
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5
packages/backend-core/src/middleware/authenticated.js
View file

@ -23,9 +23,10 @@ async function checkApiKey(apiKey, populateUser) {
if (apiKey === env.INTERNAL_API_KEY) {
return { valid: true }
}
apiKey = decrypt(apiKey)
const tenantId = apiKey.split(SEPARATOR)[0]
const decrypted = decrypt(apiKey)
const tenantId = decrypted.split(SEPARATOR)[0]
const db = getGlobalDB(tenantId)
// api key is encrypted in the database
const userId = await queryGlobalView(
ViewNames.BY_API_KEY,
{

26
packages/backend-core/src/security/encryption.js
View file

@ -3,24 +3,30 @@ const env = require("../environment")
const ALGO = "aes-256-ctr"
const SECRET = env.JWT_SECRET
const SEPARATOR = "/"
const SEPARATOR = "-"
const ITERATIONS = 10000
const RANDOM_BYTES = 16
const STRETCH_LENGTH = 32
function stretchString(string, salt) {
return crypto.pbkdf2Sync(string, salt, ITERATIONS, STRETCH_LENGTH, "sha512")
}
exports.encrypt = input => {
const random = crypto.randomBytes(16)
const cipher = crypto.createCipheriv(ALGO, SECRET, random)
const salt = crypto.randomBytes(RANDOM_BYTES)
const stretched = stretchString(SECRET, salt)
const cipher = crypto.createCipheriv(ALGO, stretched, salt)
const base = cipher.update(input)
const final = cipher.final()
const encrypted = Buffer.concat([base, final]).toString("hex")
return `${random.toString("hex")}${SEPARATOR}${encrypted}`
return `${salt.toString("hex")}${SEPARATOR}${encrypted}`
}
exports.decrypt = input => {
const [random, encrypted] = input.split(SEPARATOR)
const decipher = crypto.createDecipheriv(
ALGO,
SECRET,
Buffer.from(random, "hex")
)
const [salt, encrypted] = input.split(SEPARATOR)
const saltBuffer = Buffer.from(salt, "hex")
const stretched = stretchString(SECRET, saltBuffer)
const decipher = crypto.createDecipheriv(ALGO, stretched, saltBuffer)
const base = decipher.update(Buffer.from(encrypted, "hex"))
const final = decipher.final()
return Buffer.concat([base, final]).toString()