Struct Hctr2pp 

pub struct Hctr2pp<Aes: AesCipher> { /* private fields */ }

Generic HCTR2++ cipher parameterized by the master AES key size.

The master cipher is only used to derive the hash and re-keying subkeys. The re-keyed block cipher calls always use AES-128, since the R3 scheme produces n-bit ephemeral keys; the effective key strength is therefore 128 bits regardless of the master key size.

Implementations

impl<Aes: AesCipher> Hctr2pp<Aes>

pub const KEY_LENGTH: usize = Aes::KEY_LEN

Master key length in bytes.

pub const BLOCK_LENGTH: usize = BLOCK_LENGTH

AES block length in bytes (always 16).

pub const MIN_INPUT_LENGTH: usize = BLOCK_LENGTH

Minimum input length in bytes.

pub fn new(key: &[u8]) -> Self

Initialize HCTR2++ cipher state from a master key.

pub fn encrypt( &self, plaintext: &[u8], tweak: &[u8], ciphertext: &mut [u8], ) -> Result<(), Error>

Encrypt plaintext to ciphertext using HCTR2++.

Arguments

• plaintext - Input data to encrypt (minimum 16 bytes)
• tweak - Tweak value for domain separation
• ciphertext - Output buffer (must be same length as plaintext)

Errors

Returns Error::InputTooShort if plaintext is less than 16 bytes, and Error::OutputLengthMismatch if the buffer lengths differ.

pub fn decrypt( &self, ciphertext: &[u8], tweak: &[u8], plaintext: &mut [u8], ) -> Result<(), Error>

Decrypt ciphertext to plaintext using HCTR2++.

Arguments

• ciphertext - Input data to decrypt (minimum 16 bytes)
• tweak - Tweak value used during encryption
• plaintext - Output buffer (must be same length as ciphertext)

Errors

Returns Error::InputTooShort if ciphertext is less than 16 bytes, and Error::OutputLengthMismatch if the buffer lengths differ.