capacitor-keystore-decrypt v1.0.0

capacitor-keystore-decrypt

This plugin has 2 methods. 1 for storing a plaintext key via Android Keystore. The other method is used to decode a byte array that in encrypted with aes-123 ECB encryption.

Storing the AES Key:

• The plugin takes a plaintext AES-128 key.
• It encrypts this key using an RSA public key generated and stored in the Android Keystore.
• The encrypted AES key is then stored securely, for example, in SharedPreferences.

Retrieving and Using the AES Key for Decryption:

• When you need to decrypt data, the plugin retrieves the encrypted AES key from where it was stored.
• It then decrypts this AES key using the RSA private key from the Android Keystore.
• The decrypted AES key is now available for use.

Decrypting Data:

• The plugin uses the decrypted AES key to decrypt data within the specified indices.
• It returns the decrypted data.

Install

npm install capacitor-keystore-decrypt
npx cap sync

API

• storeKey(...)
• decryptData(...)

storeKey(...)

storeKey(options: { alias: string; keyString: string; }) => Promise<void>

Method to securely store a key in the Android Keystore.

decryptData(...)

decryptData(options: { alias: string; data: string; start: number; end: number; }) => Promise<{ data: string; }>

Method to decrypt a specific portion of a byte array using a key stored in the Android Keystore.

Returns: Promise<{ data: string; }>