AESContext

Inherits: Reference < Object Interface to low level AES encryption features.

Description

This class provides access to AES encryption/decryption of raw data. Both AES-ECB and AES-CBC mode are supported.

  1. extends Nodevar aes = AESContext.new()func _ready():    var key = "My secret key!!!" # Key must be either 16 or 32 bytes.    var data = "My secret text!!" # Data size must be multiple of 16 bytes, apply padding if needed.    # Encrypt ECB    aes.start(AESContext.MODE_ECB_ENCRYPT, key.to_utf8())    var encrypted = aes.update(data.to_utf8())    aes.finish()    # Decrypt ECB    aes.start(AESContext.MODE_ECB_DECRYPT, key.to_utf8())    var decrypted = aes.update(encrypted)    aes.finish()    # Check ECB    assert(decrypted == data.to_utf8())    var iv = "My secret iv!!!!" # IV must be of exactly 16 bytes.    # Encrypt CBC    aes.start(AESContext.MODE_CBC_ENCRYPT, key.to_utf8(), iv.to_utf8())    encrypted = aes.update(data.to_utf8())    aes.finish()    # Decrypt CBC    aes.start(AESContext.MODE_CBC_DECRYPT, key.to_utf8(), iv.to_utf8())    decrypted = aes.update(encrypted)    aes.finish()    # Check CBC    assert(decrypted == data.to_utf8())

Methods

Enumerations

Mode:

  • MODE_ECB_ENCRYPT = 0 —- AES electronic codebook encryption mode.
  • MODE_ECB_DECRYPT = 1 —- AES electronic codebook decryption mode.
  • MODE_CBC_ENCRYPT = 2 —- AES cipher blocker chaining encryption mode.
  • MODE_CBC_DECRYPT = 3 —- AES cipher blocker chaining decryption mode.
  • MODE_MAX = 4 —- Maximum value for the mode enum.

    Method Descriptions

  • finish ( ) start.
  • PoolByteArray get_iv_state ( ) update). You normally don’t need this function. Note: This function only makes sense when the context is started with MODE_CBC_ENCRYPT or MODE_CBC_DECRYPT.
  • Error start ( Mode mode, PoolByteArray key, PoolByteArray iv=PoolByteArray( ) ) mode. A key of either 16 or 32 bytes must always be provided, while an iv (initialization vector) of exactly 16 bytes, is only needed when mode is either MODE_CBC_ENCRYPT or MODE_CBC_DECRYPT.
  • PoolByteArray update ( PoolByteArray src ) PoolByteArray containing the result of encrypting (or decrypting) the given src. See start for mode of operation. Note: The size of src must be a multiple of 16. Apply some padding if needed.