Struct DerDecoder 

pub struct DerDecoder<'a> { /* private fields */ }

DER decoder: reads TLV items from a byte slice.

Implementations

impl<'a> DerDecoder<'a>

pub fn new(data: &'a [u8]) -> Self

Create a decoder over a byte slice.

pub fn remaining(&self) -> usize

Bytes remaining.

pub fn is_empty(&self) -> bool

True if all bytes consumed.

pub fn peek_tag(&self) -> Option<u8>

Peek at the next tag byte without advancing.

pub fn read_tlv(&mut self) -> Option<(u8, &'a [u8])>

Read tag + length, return (tag, content_slice).

pub fn read_sequence(&mut self) -> Option<DerDecoder<'a>>

Read a SEQUENCE, return a sub-decoder over its content.

pub fn read_integer(&mut self) -> Option<&'a [u8]>

Read an INTEGER, return the big-endian unsigned bytes (leading zero stripped).

pub fn read_integer_u64(&mut self) -> Option<u64>

Read an INTEGER as u64 (small values like version fields).

pub fn read_octet_string(&mut self) -> Option<&'a [u8]>

Read an OCTET STRING.

pub fn read_bit_string(&mut self) -> Option<&'a [u8]>

Read a BIT STRING, return the data bytes (skip unused-bits byte).

pub fn read_oid(&mut self) -> Option<&'a [u8]>

Read an OID, return the encoded bytes.

pub fn read_null(&mut self) -> Option<()>

Read a NULL.

pub fn read_context_explicit(&mut self, tag_num: u8) -> Option<DerDecoder<'a>>

Read an explicit context-tagged [N] CONSTRUCTED, return a sub-decoder over its content. Returns None if the tag number doesn’t match or the tag is absent.

pub fn skip(&mut self) -> Option<()>

Skip the next TLV element (any tag).