Struct IndefiniteLength 

pub struct IndefiniteLength(Option<Length>);

Length type with support for indefinite lengths as used by ASN.1 BER, as described in X.690 Section 8.1.3.6:

8.1.3.6 For the indefinite form, the length octets indicate that the contents octets are terminated by end-of-contents octets (see 8.1.5), and shall consist of a single octet.

8.1.3.6.1 The single octet shall have bit 8 set to one, and bits 7 to 1 set to zero.

8.1.3.6.2 If this form of length is used, then end-of-contents octets (see 8.1.5) shall be present in the encoding following the contents octets.

Indefinite lengths are non-canonical and therefore invalid DER, however there are interoperability corner cases where we have little choice but to tolerate some BER productions where this is helpful.

Tuple Fields

0: Option<Length>

Implementations

impl IndefiniteLength

pub const ZERO: Self

Length of 0.

pub const ONE: Self

Length of 1.

pub const INDEFINITE: Self

Indefinite length.

impl IndefiniteLength

pub fn new(length: impl Into<Length>) -> Self

Create a definite length from a type which can be converted into a Length.

pub fn is_definite(self) -> bool

Is this length definite?

pub fn is_indefinite(self) -> bool

Is this length indefinite?

Trait Implementations

impl Clone for IndefiniteLength

fn clone(&self) -> IndefiniteLength

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IndefiniteLength

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

Formats the value using the given formatter.

impl<'a> Decode<'a> for IndefiniteLength

fn decode<R: Reader<'a>>(reader: &mut R) -> Result<IndefiniteLength>

Attempt to decode this message using the provided decoder.

fn from_der(bytes: &'a [u8]) -> Result<Self>

Parse Self from the provided DER-encoded byte slice.

impl Encode for IndefiniteLength

fn encoded_len(&self) -> Result<Length>

Compute the length of this value in bytes when encoded as ASN.1 DER.

fn encode(&self, writer: &mut impl Writer) -> Result<()>

Encode this value as ASN.1 DER using the provided Writer.

fn encode_to_slice<'a>(&self, buf: &'a mut [u8]) -> Result<&'a [u8]>

Encode this value to the provided byte slice, returning a sub-slice containing the encoded message.

fn encode_to_vec(&self, buf: &mut Vec<u8>) -> Result<Length>

Encode this message as ASN.1 DER, appending it to the provided byte vector.

fn to_der(&self) -> Result<Vec<u8>>

Encode this type as DER, returning a byte vector.

impl From<IndefiniteLength> for Option<Length>

fn from(length: IndefiniteLength) -> Option<Length>

Converts to this type from the input type.

impl From<Length> for IndefiniteLength

fn from(length: Length) -> IndefiniteLength

Converts to this type from the input type.

impl From<Option<Length>> for IndefiniteLength

fn from(length: Option<Length>) -> IndefiniteLength

Converts to this type from the input type.

impl Ord for IndefiniteLength

fn cmp(&self, other: &IndefiniteLength) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for IndefiniteLength

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for IndefiniteLength

fn partial_cmp(&self, other: &IndefiniteLength) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<IndefiniteLength> for Length

type Error = Error

The type returned in the event of a conversion error.

fn try_from(length: IndefiniteLength) -> Result<Length>

Performs the conversion.

impl Copy for IndefiniteLength

impl Eq for IndefiniteLength

impl StructuralPartialEq for IndefiniteLength