Trait yasna::BERDecodable
source · pub trait BERDecodable: Sized {
// Required method
fn decode_ber<'a, 'b>(reader: BERReader<'a, 'b>) -> ASN1Result<Self>;
}Expand description
Types decodable in BER.
Examples
use yasna;
let asn : i64 = yasna::decode_der(&[2, 3, 0, 255, 255]).unwrap();
assert_eq!(asn, 65535);Limitations
Rust types don’t correspond to ASN.1 types one-to-one. Not all kinds
of ASN.1 types can be decoded via default BERDecodable implementation.
If you want to decode ASN.1, you may implement BERDecodable for your
own types or use parse_der/
parse_ber.
Default implementations
- The decoder for
Vec<T>is implemented as SEQUENCE OF decoder. ()as NULL decoder.- Tuples (except
()) as SEQUENCE decoder. Vec<u8>as OCTETSTRING decoder.BitVecas BITSTRING decoder.Stringas UTF8String decoder.i64,u64,i32,u32,i16,u16,BigInt,BigUintas INTEGER decoder. (u8is avoided because of confliction.)boolas BOOLEAN decoder.ObjectIdentifieras OBJECTT IDENTIFIER decoder.UTCTime/GeneralizedTimeas UTCTime/GeneralizedTime decoder.
Required Methods§
sourcefn decode_ber<'a, 'b>(reader: BERReader<'a, 'b>) -> ASN1Result<Self>
fn decode_ber<'a, 'b>(reader: BERReader<'a, 'b>) -> ASN1Result<Self>
Reads an ASN.1 value from BERReader and converts it to Self.
Examples
use yasna::{BERDecodable,BERReader,ASN1Result};
struct Entry {
name: String,
age: i64,
}
impl BERDecodable for Entry {
fn decode_ber(reader: BERReader) -> ASN1Result<Self> {
reader.read_sequence(|reader| {
let name = reader.next().read_visible_string()?;
let age = reader.next().read_i64()?;
return Ok(Entry {
name: name,
age: age,
});
})
}
}
fn main() {
let entry : Entry = yasna::decode_der(
&[48, 9, 26, 4, 74, 111, 104, 110, 2, 1, 32]).unwrap();
assert_eq!(entry.name, "John");
assert_eq!(entry.age, 32);
}