CipherWrapperUtil is a Kotlin class that can be used to encrypt/decrypt data using symmetric key cryptography. It is designed to work with Android KeyStore, which provides a secure storage facility for cryptographic keys and certificates. In general, The wrapper class for implementation for cryptography with CIPHER and Android Key Store.
To use CipherWrapperUtil in your Android project, simply copy the CipherWrapperUtil class into your project and instantiate it with the desired cipher transformation (e.g. CipherWrapperUtil.TRANSFORMATION_SYMMETRIC).
To encrypt data, call the encrypt function with the alias of the entry in which the generated key will appear in Android KeyStore, and the data to encrypt as a string. The function will return a Pair containing the encrypted data as a ByteArray and the cipher IV as a String.
val cipher = CipherWrapperUtil(CipherWrapperUtil.TRANSFORMATION_SYMMETRIC)
val alias = "myAlias"
val input = "secret message"
val (encryptedData, iv) = cipher.encrypt(alias, input)To decrypt data, call the decrypt function with the alias of the entry in which the generated key will appear in Android KeyStore, the encrypted data as a ByteArray, and the cipher IV generated during encryption as a String. The function will return the decrypted data as a string.
val cipher = CipherWrapperUtil(CipherWrapperUtil.TRANSFORMATION_SYMMETRIC)
val alias = "myAlias"
val decryptedData = cipher.decrypt(alias, encryptedData, iv)Contributions to this library are welcome. If you find a bug or have a feature request, please open an issue on the GitHub repository.
This library is released under the MIT License.