Struct der::asn1::BitString

pub struct BitString { /* private fields */ }

Owned form of ASN.1 BIT STRING type.

This type provides the same functionality as BitStringRef but owns the backing data.

Implementations

impl BitString

pub const MAX_UNUSED_BITS: u8 = 7u8

Maximum number of unused bits allowed.

pub fn new(unused_bits: u8, bytes: impl Into<Vec<u8>>) -> Result<Self>

Create a new ASN.1 BIT STRING from a byte slice.

Accepts an optional number of “unused bits” (0-7) which are omitted from the final octet. This number is 0 if the value is octet-aligned.

pub fn from_bytes(bytes: &[u8]) -> Result<Self>

Create a new ASN.1 BIT STRING from the given bytes.

The “unused bits” are set to 0.

pub fn unused_bits(&self) -> u8

Get the number of unused bits in the octet serialization of this BIT STRING.

pub fn has_unused_bits(&self) -> bool

Is the number of unused bits a value other than 0?

pub fn bit_len(&self) -> usize

Get the length of this BIT STRING in bits.

pub fn is_empty(&self) -> bool

Is the inner byte slice empty?

pub fn as_bytes(&self) -> Option<&[u8]>

Borrow the inner byte slice.

Returns None if the number of unused bits is not equal to zero, i.e. if the BIT STRING is not octet aligned.

Use BitString::raw_bytes to obtain access to the raw value regardless of the presence of unused bits.

pub fn raw_bytes(&self) -> &[u8]

Borrow the raw bytes of this BIT STRING.

pub fn bits(&self) -> BitStringIter<'_>

Iterator over the bits of this BIT STRING.

Trait Implementations

impl Clone for BitString

fn clone(&self) -> BitString

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BitString

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

Formats the value using the given formatter.

impl<'a> DecodeValue<'a> for BitString

fn decode_value<R: Reader<'a>>(reader: &mut R, header: Header) -> Result<Self>

Attempt to decode this message using the provided Reader.

impl EncodeValue for BitString

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

Compute the length of this value (sans Tag+Length header) when encoded as ASN.1 DER.

fn encode_value(&self, writer: &mut dyn Writer) -> Result<()>

Encode value (sans Tag+Length header) as ASN.1 DER using the provided Writer.

fn header(&self) -> Result<Header>

where Self: Tagged,

Get the Header used to encode this value.

impl FixedTag for BitString

const TAG: Tag = Tag::BitString

ASN.1 tag

impl<'a> From<&'a BitString> for BitStringRef<'a>

fn from(bit_string: &'a BitString) -> BitStringRef<'a>

Converts to this type from the input type.

impl Ord for BitString

fn cmp(&self, other: &BitString) -> 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 + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for BitString

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

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

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.

impl PartialOrd for BitString

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

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

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

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

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

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

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

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

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

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

impl ValueOrd for BitString

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

Return an Ordering between value portion of TLV-encoded self and other when serialized as ASN.1 DER.

impl Eq for BitString

impl StructuralPartialEq for BitString