dyna-crypt

About

Encrypts and decrypts objects (or strings and numbers also) with AES with in very simple way.

The *Ex methods are checking also if the encrypted data are expired.

Writter in Typescript, runs in universal environments.

Methods

Crypt

encrypt(obj: any, key: string = '0'): string

Encrypts something. It creates the cipher to be used for decrypt.

Throws a JSON-stringify exception if in case of object the object cannot be stringified.

decrypt(cipherText: string, key: string = '0'): any

Decrypts something.

Returns undefined if the key is wrong.

Crypt with expiration

encryptWithExpire(data: any, key: string, expireInMinutes?: number): string

Encrypts something with expiration in expireInMinutes. Technically the expired data can me decrypted but the bellow methods won't expose them.

expireInMinutes is optional, if not defined the data won't expire.

decryptWithExpire(cipher: string, key: string): any

Decrypts an object.

• If the key is wrong the output is undefined.
• If it is expired the output is undefined.

To get more info if the decryption failed (and got undefined) because of the wrong key or if it is expired, use the decryptWithExpireDetails.

decryptWithExpireDetails(cipher: string, key: string): IDecryptResult

It works exactly as the decryptWithExpire but returns an object with in IDecryptResult interface (see below) where gives more details on decryption.

Interfaces

interface IDecryptResult

interface IDecryptResult {
  valid: boolean;
  data: any | null;
  result: EDecryptionResult;
}

enum EDecryptionResult {
  SUCCESS = "SUCCESS",
  INVALID_KEY = "INVALID_KEY",
  EXPIRED = "EXPIRED",
}