Struct Decoder

pub struct Decoder<'input> { /* private fields */ }

Implementations

impl<'input> Decoder<'input>

pub fn codec(&self) -> Codec

pub fn new(input: &'input BitStr, options: DecoderOptions) -> Self

pub fn input(&self) -> &'input BitStr

Returns the remaining input, if any.

pub fn decode_string_length( &mut self, input: BSlice<'input, u8, Msb0>, constraints: Option<&Extensible<Size>>, is_large_string: bool, decode_fn: &mut impl FnMut(BSlice<'input, u8, Msb0>, usize) -> Result<BSlice<'input, u8, Msb0>>, ) -> Result<BSlice<'input, u8, Msb0>>

pub fn decode_length( &mut self, input: BSlice<'input, u8, Msb0>, constraints: Option<&Extensible<Size>>, decode_fn: &mut impl FnMut(BSlice<'input, u8, Msb0>, usize) -> Result<BSlice<'input, u8, Msb0>>, ) -> Result<BSlice<'input, u8, Msb0>>

Trait Implementations

impl<'input> Decoder for Decoder<'input>

fn decode_optional_with_tag<D: Decode>( &mut self, tag: Tag, ) -> Result<Option<D>, Self::Error>

Decode an the optional value in a SEQUENCE or SET with tag. Passing the correct tag is required even when used with codecs where the tag is not present.

type Error = DecodeError

fn codec(&self) -> Codec

Returns codec variant of Codec that current decoder is decoding.

fn decode_any(&mut self) -> Result<Any>

Decode a unknown ASN.1 value identified by tag from the available input.

fn decode_bool(&mut self, _: Tag) -> Result<bool>

Decode a BOOL identified by tag from the available input.

fn decode_enumerated<E: Enumerated>(&mut self, _: Tag) -> Result<E>

Decode an enumerated enum’s discriminant identified by tag from the available input.

fn decode_integer<I: IntegerType>( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<I>

Decode a INTEGER identified by tag from the available input.

fn decode_octet_string( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<Vec<u8>>

Decode a OCTET STRING identified by tag from the available input.

fn decode_null(&mut self, _: Tag) -> Result<()>

Decode NULL identified by tag from the available input.

fn decode_object_identifier(&mut self, _: Tag) -> Result<ObjectIdentifier>

Decode a OBJECT IDENTIFIER identified by tag from the available input.

fn decode_bit_string( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<BitString>

Decode a BIT STRING identified by tag from the available input.

fn decode_visible_string( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<VisibleString>

Decode a VisibleString identified by tag from the available input.

fn decode_ia5_string( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<Ia5String>

Decode a Ia5String identified by tag from the available input.

fn decode_printable_string( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<PrintableString>

Decode a PrintableString identified by tag from the available input.

fn decode_numeric_string( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<NumericString>

Decode a NumericString identified by tag from the available input.

fn decode_teletex_string( &mut self, _: Tag, _constraints: Constraints<'_>, ) -> Result<TeletexString>

Decode a TeletexString identified by tag from the available input.

fn decode_bmp_string( &mut self, _: Tag, _constraints: Constraints<'_>, ) -> Result<BmpString>

Decode a BmpString identified by tag from the available input.

fn decode_utf8_string( &mut self, tag: Tag, constraints: Constraints<'_>, ) -> Result<Utf8String>

Decode a UTF8 STRING identified by tag from the available input.

fn decode_general_string( &mut self, tag: Tag, constraints: Constraints<'_>, ) -> Result<GeneralString>

Decode a Ia5String identified by tag from the available input.

fn decode_generalized_time(&mut self, tag: Tag) -> Result<GeneralizedTime>

Decode a GeneralizedTime identified by tag from the available input.

fn decode_utc_time(&mut self, tag: Tag) -> Result<UtcTime>

Decode a UtcTime identified by tag from the available input.

fn decode_sequence_of<D: Decode>( &mut self, _: Tag, constraints: Constraints<'_>, ) -> Result<Vec<D>, Self::Error>

Decode a SEQUENCE OF D where D: Decode identified by tag from the available input.

fn decode_set_of<D: Decode + Ord>( &mut self, tag: Tag, constraints: Constraints<'_>, ) -> Result<SetOf<D>, Self::Error>

Decode a SET OF D where D: Decode identified by tag from the available input.

fn decode_sequence<D, DF, F>( &mut self, _: Tag, _: Option<DF>, decode_fn: F, ) -> Result<D, Self::Error>

where D: Constructed, DF: FnOnce() -> D, F: FnOnce(&mut Self) -> Result<D, Self::Error>,

Decode a SEQUENCE identified by tag from the available input. Returning a new Decoder containing the sequence’s contents to be decoded.

fn decode_explicit_prefix<D: Decode>(&mut self, _: Tag) -> Result<D>

Decode an ASN.1 value that has been explicitly prefixed with tag from the available input.

fn decode_set<FIELDS, SET, D, F>( &mut self, _: Tag, decode_fn: D, field_fn: F, ) -> Result<SET, Self::Error>

where SET: Decode + Constructed, FIELDS: Decode, D: Fn(&mut Self, usize, Tag) -> Result<FIELDS, Self::Error>, F: FnOnce(Vec<FIELDS>) -> Result<SET, Self::Error>,

Decode a SET identified by tag from the available input. Decoding SETs works a little different than other methods, as you need to provide two types SET and FIELDS, SET represents the complete type, and FIELDS must represent a CHOICE with a variant for each field from SET. As with SETs the field order is not guarenteed, so you’ll have map from Vec<FIELDS> to SET in decode_operation.

fn decode_optional<D: Decode>(&mut self) -> Result<Option<D>, Self::Error>

Decode an the optional value in a SEQUENCE or SET.

fn decode_optional_with_constraints<D: Decode>( &mut self, constraints: Constraints<'_>, ) -> Result<Option<D>, Self::Error>

Decode an the optional value in a SEQUENCE or SET with constraints.

fn decode_optional_with_tag_and_constraints<D: Decode>( &mut self, tag: Tag, constraints: Constraints<'_>, ) -> Result<Option<D>, Self::Error>

Decode an the optional value in a SEQUENCE or SET with tag and constraints.

fn decode_choice<D>( &mut self, constraints: Constraints<'_>, ) -> Result<D, Self::Error>

where D: DecodeChoice,

Decode an the optional value in a SEQUENCE or SET.

fn decode_extension_addition_group<D: Decode + Constructed>( &mut self, ) -> Result<Option<D>, Self::Error>

fn decode_extension_addition_with_constraints<D>( &mut self, constraints: Constraints<'_>, ) -> Result<Option<D>, Self::Error>

where D: Decode,

Decode an extension addition with constraints in a SEQUENCE or SET

fn decode_default<D: Decode, F: FnOnce() -> D>( &mut self, default_fn: F, ) -> Result<D, Self::Error>

Decode a DEFAULT value in a SEQUENCE or SET.

fn decode_default_with_tag<D: Decode, F: FnOnce() -> D>( &mut self, tag: Tag, default_fn: F, ) -> Result<D, Self::Error>

Decode a DEFAULT value in a SEQUENCE or SET with tag and default_fn.

fn decode_default_with_constraints<D: Decode, F: FnOnce() -> D>( &mut self, default_fn: F, constraints: Constraints<'_>, ) -> Result<D, Self::Error>

Decode a DEFAULT value with constraints in a SEQUENCE or SET with a given default_fn.

fn decode_default_with_tag_and_constraints<D: Decode, F: FnOnce() -> D>( &mut self, tag: Tag, default_fn: F, constraints: Constraints<'_>, ) -> Result<D, Self::Error>

Decode a DEFAULT value in a SEQUENCE or SET with tag, constraints and default_fn.

fn decode_extension_addition<D>(&mut self) -> Result<Option<D>, Self::Error>

where D: Decode,

fn decode_extension_addition_with_default<D: Decode, F: FnOnce() -> D>( &mut self, default_fn: F, ) -> Result<D, Self::Error>

Decode a DEFAULT value in a SEQUENCE’s or SET’s extension

fn decode_extension_addition_with_default_and_constraints<D: Decode, F: FnOnce() -> D>( &mut self, default_fn: F, constraints: Constraints<'_>, ) -> Result<D, Self::Error>

Decode a DEFAULT value with constraints in a SEQUENCE’s or SET’s extension