Enum bsn1::Length

pub enum Length {
    Indefinite,
    Definite(usize),
}

Length represents ASN.1 length.

Note that Length represents the byte count of the contents in ASN.1. The total byte size of BER, DER, and CER is greater than that. (BER, DER, and CER are constituted of identifier, length, and contents.)

Variants

Indefinite

Represents ‘Indefinite’ length.

‘Indefinite’ is only for ‘BER’, and the contents must end with ‘EOC’ octets.

Definite(usize)

‘Definite’ is for ‘BER’, ‘DER’, and ‘CER’, and represents the byte count of the contents.

Implementations

impl Length

pub fn to_bytes(&self) -> impl AsRef<[u8]>

Serializes length .

This function won’t allocate heap memory.

Examples

use bsn1::Length;
use core::convert::TryFrom;

let length = Length::Definite(3);
let bytes = length.to_bytes();

let deserialized = Length::try_from(bytes.as_ref()).unwrap();
assert_eq!(length, deserialized);

Trait Implementations

impl Clone for Length

fn clone(&self) -> Length

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Length

impl Debug for Length

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Length

impl Hash for Length

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl PartialEq<Length> for Length

fn eq(&self, other: &Length) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Length) -> bool

This method tests for !=.

impl StructuralEq for Length

impl StructuralPartialEq for Length

impl TryFrom<&'_ [u8]> for Length

type Error = Error

The type returned in the event of a conversion error.

fn try_from(bytes: &[u8]) -> Result<Self, Self::Error>

Parses bytes starting with length octets and returns a Length .

This function ignores extra octet(s) at the end of bytes if any.