Crypto algorithm block size in octets. If plaintext and ciphertext have different lengths, the longer length is considered.
Number of counter bits.
Optional
fixedFixed portion.
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.
Optional
fixedNumber of fixed bits.
0
IV length in octets.
Optional
requireIf true, all IVs must have the same bits in the random portion.
false
Options for Initialization Vectors using fixed+random+counter structure.
IVs following this construction method have three parts: