Struct der::PemReader

pub struct PemReader<'i> { /* private fields */ }

Available on crate feature pem only.

Reader type which decodes PEM on-the-fly.

Implementations

impl<'i> PemReader<'i>

pub fn new(pem: &'i [u8]) -> Result<Self>

Create a new PEM reader which decodes data on-the-fly.

Uses the default 64-character line wrapping.

pub fn type_label(&self) -> &'i str

Get the PEM label which will be used in the encapsulation boundaries for this document.

Trait Implementations

impl<'i> Clone for PemReader<'i>

fn clone(&self) -> PemReader<'i>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'i> Reader<'i> for PemReader<'i>

fn input_len(&self) -> Length

Get the length of the input.

fn peek_byte(&self) -> Option<u8>

Peek at the next byte of input without modifying the cursor.

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

Peek forward in the input data, attempting to decode a Header from the data at the current position in the decoder.

fn position(&self) -> Length

Get the position within the buffer.

fn read_slice(&mut self, _len: Length) -> Result<&'i [u8]>

Attempt to read data borrowed directly from the input as a slice, updating the internal cursor position.

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

Attempt to read input data, writing it into the provided buffer, and returning a slice on success.

fn context_specific<T>(
    &mut self,
    tag_number: TagNumber,
    tag_mode: TagMode
) -> Result<Option<T>>where
    T: DecodeValue<'r> + FixedTag,

Attempt to decode an ASN.1 CONTEXT-SPECIFIC field with the provided TagNumber.

fn decode<T: Decode<'r>>(&mut self) -> Result<T>

Decode a value which impls the Decode trait.

fn error(&mut self, kind: ErrorKind) -> Error

Return an error with the given ErrorKind, annotating it with context about where the error occurred.

fn finish<T>(self, value: T) -> Result<T>

Finish decoding, returning the given value if there is no remaining data, or an error otherwise

fn is_finished(&self) -> bool

Have we read all of the input data?

fn offset(&self) -> Length

Offset within the original input stream.

fn peek_tag(&self) -> Result<Tag>

Peek at the next byte in the decoder and attempt to decode it as a Tag value.

fn read_byte(&mut self) -> Result<u8>

Read a single byte.

fn read_nested<'n, T, F>(&'n mut self, len: Length, f: F) -> Result<T>where
    F: FnOnce(&mut NestedReader<'n, Self>) -> Result<T>,

Read nested data of the given length.

fn read_vec(&mut self, len: Length) -> Result<Vec<u8>>

Available on crate feature alloc only.

Read a byte vector of the given length.

fn remaining_len(&self) -> Length

Get the number of bytes still remaining in the buffer.

fn sequence<'n, F, T>(&'n mut self, f: F) -> Result<T>where
    F: FnOnce(&mut NestedReader<'n, Self>) -> Result<T>,

Read an ASN.1 SEQUENCE, creating a nested Reader for the body and calling the provided closure with it.

fn tlv_bytes(&mut self) -> Result<&'r [u8]>

Obtain a slice of bytes contain a complete TLV production suitable for parsing later.