Struct der::IndefiniteLength

source ·
pub struct IndefiniteLength(/* private fields */);
Expand description

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.

Implementations§

source§

impl IndefiniteLength

source

pub const ZERO: Self = _

Length of 0.

source

pub const ONE: Self = _

Length of 1.

source

pub const INDEFINITE: Self = _

Indefinite length.

source§

impl IndefiniteLength

source

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

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

source

pub fn is_definite(self) -> bool

Is this length definite?

source

pub fn is_indefinite(self) -> bool

Is this length indefinite?

Trait Implementations§

source§

impl Clone for IndefiniteLength

source§

fn clone(&self) -> IndefiniteLength

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl Debug for IndefiniteLength

source§

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

Formats the value using the given formatter. Read more
source§

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

source§

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

Attempt to decode this message using the provided decoder.
source§

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

Parse Self from the provided DER-encoded byte slice.
source§

impl Encode for IndefiniteLength

source§

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

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

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

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

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.
source§

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.
source§

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

Encode this type as DER, returning a byte vector.
source§

impl From<IndefiniteLength> for Option<Length>

source§

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

Converts to this type from the input type.
source§

impl From<Length> for IndefiniteLength

source§

fn from(length: Length) -> IndefiniteLength

Converts to this type from the input type.
source§

impl From<Option<Length>> for IndefiniteLength

source§

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

Converts to this type from the input type.
source§

impl Ord for IndefiniteLength

source§

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

This method returns an Ordering between self and other. Read more
1.21.0 · source§

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

Compares and returns the maximum of two values. Read more
1.21.0 · source§

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

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
source§

impl PartialEq for IndefiniteLength

source§

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl PartialOrd for IndefiniteLength

source§

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

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source§

impl TryFrom<IndefiniteLength> for Length

§

type Error = Error

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

impl Copy for IndefiniteLength

source§

impl Eq for IndefiniteLength

source§

impl StructuralPartialEq for IndefiniteLength

Auto Trait Implementations§

Blanket Implementations§

source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> CloneToUninit for T
where T: Copy,

source§

unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
source§

impl<T> CloneToUninit for T
where T: Clone,

source§

default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T> DecodeOwned for T
where T: for<'a> Decode<'a>,