Struct der::Length

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pub struct Length(_);
Expand description

ASN.1-encoded length.

Maximum length is defined by the Length::MAX constant (256 MiB).

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impl Length

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pub const ZERO: Self = _

Length of 0

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pub const ONE: Self = _

Length of 1

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pub const MAX: Self = _

Maximum length currently supported: 256 MiB

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pub const fn new(value: u16) -> Self

Create a new Length for any value which fits inside of a u16.

This function is const-safe and therefore useful for Length constants.

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pub fn is_zero(self) -> bool

Is this length equal to zero?

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pub fn for_tlv(self) -> Result<Self>

Get the length of DER Tag-Length-Value (TLV) encoded data if self is the length of the inner “value” portion of the message.

Trait Implementations§

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impl Add<Length> for Length

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type Output = Result<Length, Error>

The resulting type after applying the + operator.
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fn add(self, other: Self) -> Result<Self>

Performs the + operation. Read more
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impl Add<Length> for Result<Length>

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type Output = Result<Length, Error>

The resulting type after applying the + operator.
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fn add(self, other: Length) -> Self

Performs the + operation. Read more
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impl Add<u16> for Length

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type Output = Result<Length, Error>

The resulting type after applying the + operator.
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fn add(self, other: u16) -> Result<Self>

Performs the + operation. Read more
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impl Add<u32> for Length

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type Output = Result<Length, Error>

The resulting type after applying the + operator.
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fn add(self, other: u32) -> Result<Self>

Performs the + operation. Read more
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impl Add<u8> for Length

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type Output = Result<Length, Error>

The resulting type after applying the + operator.
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fn add(self, other: u8) -> Result<Self>

Performs the + operation. Read more
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impl Add<usize> for Length

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type Output = Result<Length, Error>

The resulting type after applying the + operator.
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fn add(self, other: usize) -> Result<Self>

Performs the + operation. Read more
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impl Clone for Length

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fn clone(&self) -> Length

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Length

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

Formats the value using the given formatter. Read more
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impl Decodable<'_> for Length

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fn decode(decoder: &mut Decoder<'_>) -> Result<Length>

Attempt to decode this message using the provided decoder.
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fn from_der(bytes: &'a [u8]) -> Result<Self>

Parse Self from the provided DER-encoded byte slice.
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impl Default for Length

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fn default() -> Length

Returns the “default value” for a type. Read more
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impl DerOrd for Length

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fn der_cmp(&self, other: &Self) -> Result<Ordering>

Return an Ordering between self and other when serialized as ASN.1 DER.
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impl Display for Length

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

Formats the value using the given formatter. Read more
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impl Encodable for Length

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

Compute the length of this value in bytes when encoded as ASN.1 DER.
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fn encode(&self, encoder: &mut Encoder<'_>) -> Result<()>

Encode this value as ASN.1 DER using the provided Encoder.
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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.
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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.
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fn to_vec(&self) -> Result<Vec<u8>>

Serialize this message as a byte vector.
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impl From<Length> for u32

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fn from(length: Length) -> u32

Converts to this type from the input type.
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impl From<u16> for Length

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fn from(len: u16) -> Length

Converts to this type from the input type.
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impl From<u8> for Length

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fn from(len: u8) -> Length

Converts to this type from the input type.
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impl Ord for Length

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

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl PartialEq<Length> for Length

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

This method tests for self and other values to be equal, and is used by ==.
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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.
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impl PartialOrd<Length> for Length

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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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
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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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
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impl Sub<Length> for Length

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type Output = Result<Length, Error>

The resulting type after applying the - operator.
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fn sub(self, other: Length) -> Result<Self>

Performs the - operation. Read more
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impl Sub<Length> for Result<Length>

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type Output = Result<Length, Error>

The resulting type after applying the - operator.
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fn sub(self, other: Length) -> Self

Performs the - operation. Read more
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impl TryFrom<Length> for usize

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(len: Length) -> Result<usize>

Performs the conversion.
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impl TryFrom<u32> for Length

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(len: u32) -> Result<Length>

Performs the conversion.
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impl TryFrom<usize> for Length

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(len: usize) -> Result<Length>

Performs the conversion.
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impl Copy for Length

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impl Eq for Length

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impl StructuralEq for Length

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impl StructuralPartialEq for Length

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · 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.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.