Struct bcder::int::Unsigned

pub struct Unsigned(_);

A BER encoded unsigned integer.

As integers are variable length in BER, this type is just a simple wrapper atop the underlying Bytes value containing the raw content. It guarantees that the wrapped integer is greater or equal to 0. This equals an integer defined as INTEGER (0..MAX) in ASN.1.

If you need a integer without any restrictions, you can use Integer. If you have even stricter range restrictions, you can also use the methods provided on the content types to decode into Rust’s primitive integer types such as u16.

BER Encoding

In BER, an INTEGER is encoded as a primitive value with the content octets providing a variable-length, big-endian, two‘s complement byte sequence of that integer. Thus, the most-significant bit of the first octet serves as the sign bit and, for an unsigned integer, has to be unset.

Methods

impl Unsigned

Decoding and Encoding

pub fn take_from<S: Source>(cons: &mut Constructed<S>) -> Result<Self, S::Err>

pub fn from_primitive<S: Source>(
    prim: &mut Primitive<S>
) -> Result<Self, S::Err>

pub fn u8_from_primitive<S: Source>(
    prim: &mut Primitive<S>
) -> Result<u8, S::Err>

pub fn u16_from_primitive<S: Source>(
    prim: &mut Primitive<S>
) -> Result<u16, S::Err>

pub fn u32_from_primitive<S: Source>(
    prim: &mut Primitive<S>
) -> Result<u32, S::Err>

pub fn u64_from_primitive<S: Source>(
    prim: &mut Primitive<S>
) -> Result<u64, S::Err>

pub fn u128_from_primitive<S: Source>(
    prim: &mut Primitive<S>
) -> Result<u128, S::Err>

Trait Implementations

impl<'a> PrimitiveContent for &'a Unsigned

const TAG: Tag

The natural tag of an encoded value of this type.

fn encoded_len(&self, mode: Mode) -> usize

Returns the length of the encoded content of this type.

fn write_encoded<W: Write>(
    &self,
    mode: Mode,
    target: &mut W
) -> Result<(), Error>

Writes the encoded content to a writer.

fn to_encoded_bytes(&self, mode: Mode) -> Bytes

Encodes the value to bytes (useful when you need to sign a structure)

fn encode(self) -> Primitive<Self>

Returns a value encoder for this content using the natural tag.

fn encode_as(self, tag: Tag) -> Primitive<Self>

Returns a value encoder for this content using the given tag.

fn encode_ref(&self) -> Primitive<&Self>

Returns a value encoder for a reference using the natural tag.

fn encode_ref_as(&self, tag: Tag) -> Primitive<&Self>

Returns a value encoder for a reference using the given tag.

impl PartialOrd<Unsigned> for Unsigned

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl AsRef<Integer> for Unsigned

fn as_ref(&self) -> &Integer

Performs the conversion.

impl AsRef<Bytes> for Unsigned

fn as_ref(&self) -> &Bytes

Performs the conversion.

impl AsRef<[u8]> for Unsigned

fn as_ref(&self) -> &[u8]

Performs the conversion.

impl PartialEq<Unsigned> for Integer

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

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

#[must_use]

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

This method tests for !=.

impl PartialEq<Unsigned> for Unsigned

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

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

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

This method tests for !=.

impl From<u8> for Unsigned

fn from(val: u8) -> Unsigned

Performs the conversion.

impl From<u16> for Unsigned

fn from(val: u16) -> Unsigned

Performs the conversion.

impl From<u32> for Unsigned

fn from(val: u32) -> Unsigned

Performs the conversion.

impl From<u64> for Unsigned

fn from(val: u64) -> Unsigned

Performs the conversion.

impl From<u128> for Unsigned

fn from(val: u128) -> Unsigned

Performs the conversion.

impl Clone for Unsigned

fn clone(&self) -> Unsigned

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Ord for Unsigned

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

impl Eq for Unsigned

impl Debug for Unsigned

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

Formats the value using the given formatter.

impl Hash for Unsigned

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].