Interface CounterIvOptions

Options for Initialization Vectors using fixed+random+counter structure.

IVs following this construction method have three parts:

  1. fixed bits, specified in options.
  2. random bits, different for each key and in each session.
  3. counter bits, monotonically increasing for each plaintext/ciphertext block.
interface CounterIvOptions {
    blockSize: number;
    counterBits: number;
    fixed?: bigint | Uint8Array;
    fixedBits?: number;
    ivLength: number;
}

Hierarchy (view full)

Properties

blockSize counterBits fixed? fixedBits? ivLength

Properties

blockSize

blockSize: number

Crypto algorithm block size in octets. If plaintext and ciphertext have different lengths, the longer length is considered.

counterBits

counterBits: number

Number of counter bits.

Optionalfixed

fixed?: bigint | Uint8Array

Fixed portion.

Remarks

Required if fixedBits is positive. This may be specified as a bigint or a Uint8Array. If it's a Uint8Array, it must have at least fixedBits bits. The least significant bits are taken.

OptionalfixedBits

fixedBits?: number

Number of fixed bits.

Default Value

0

ivLength

ivLength: number

IV length in octets.

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