pub struct Integer<'a> { /* private fields */ }
mtls
only.Expand description
ASN.1 INTEGER
type
Generic representation for integer types. BER/DER integers can be of any size, so it is not possible to store them as simple integers (they are stored as raw bytes).
The internal representation can be obtained using .as_ref()
.
§Note
Methods from/to BER and DER encodings are also implemented for primitive types
(u8
, u16
to u128
, and i8
to i128
).
In most cases, it is easier to use these types directly.
§Examples
Creating an Integer
use asn1_rs::Integer;
// unsigned
let i = Integer::from(4);
assert_eq!(i.as_ref(), &[4]);
// signed
let j = Integer::from(-2);
assert_eq!(j.as_ref(), &[0xfe]);
Converting an Integer
to a primitive type (using the TryInto
trait)
use asn1_rs::{Error, Integer};
use std::convert::TryInto;
let i = Integer::new(&[0x12, 0x34, 0x56, 0x78]);
// converts to an u32
let n: u32 = i.try_into().unwrap();
// Same, but converting to an u16: will fail, value cannot fit into an u16
let i = Integer::new(&[0x12, 0x34, 0x56, 0x78]);
assert_eq!(i.try_into() as Result<u16, _>, Err(Error::IntegerTooLarge));
Encoding an Integer
to DER
use asn1_rs::{Integer, ToDer};
let i = Integer::from(4);
let v = i.to_der_vec().unwrap();
assert_eq!(&v, &[2, 1, 4]);
// same, with primitive types
let v = 4.to_der_vec().unwrap();
assert_eq!(&v, &[2, 1, 4]);
Implementations§
Source§impl<'a> Integer<'a>
impl<'a> Integer<'a>
Trait Implementations§
Source§impl<'a> CheckDerConstraints for Integer<'a>
impl<'a> CheckDerConstraints for Integer<'a>
Source§impl ToDer for Integer<'_>
impl ToDer for Integer<'_>
Source§fn to_der_len(&self) -> Result<usize, Error>
fn to_der_len(&self) -> Result<usize, Error>
Source§fn write_der_header(
&self,
writer: &mut dyn Write,
) -> Result<usize, SerializeError>
fn write_der_header( &self, writer: &mut dyn Write, ) -> Result<usize, SerializeError>
Source§fn write_der_content(
&self,
writer: &mut dyn Write,
) -> Result<usize, SerializeError>
fn write_der_content( &self, writer: &mut dyn Write, ) -> Result<usize, SerializeError>
Source§fn to_der_vec(&self) -> Result<Vec<u8>, SerializeError>
fn to_der_vec(&self) -> Result<Vec<u8>, SerializeError>
Vec<u8>
.Source§fn to_der_vec_raw(&self) -> Result<Vec<u8>, SerializeError>
fn to_der_vec_raw(&self) -> Result<Vec<u8>, SerializeError>
to_vec
, but uses provided values without changes.
This can generate an invalid encoding for a DER object.Source§fn write_der(&self, writer: &mut dyn Write) -> Result<usize, SerializeError>
fn write_der(&self, writer: &mut dyn Write) -> Result<usize, SerializeError>
Source§fn write_der_raw(&self, writer: &mut dyn Write) -> Result<usize, SerializeError>
fn write_der_raw(&self, writer: &mut dyn Write) -> Result<usize, SerializeError>
to_der
, but uses provided values without changes.
This can generate an invalid encoding for a DER object.impl DerAutoDerive for Integer<'_>
impl<'a> Eq for Integer<'a>
impl<'a> StructuralPartialEq for Integer<'a>
Auto Trait Implementations§
impl<'a> Freeze for Integer<'a>
impl<'a> RefUnwindSafe for Integer<'a>
impl<'a> Send for Integer<'a>
impl<'a> Sync for Integer<'a>
impl<'a> Unpin for Integer<'a>
impl<'a> UnwindSafe for Integer<'a>
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