1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

/* Copyright (c) Fortanix, Inc.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use yasna::{ASN1Result, BERDecodable, parse_der, parse_ber};

/// Trait for objects that can be deserialized from a DER representation.  A
/// wrapper around yasna's `FromBER` trait that sets DER mode and eliminates the
/// `parse_der / from_ber` boilerplate.
pub trait FromDer: BERDecodable {
    fn from_der<T: ?Sized + AsRef<[u8]>>(der: &T) -> ASN1Result<Self> {
        parse_der(der.as_ref(), |r| Self::decode_ber(r))
    }
}

/// Trait for objects that can be deserialized from a BER representation.  A
/// wrapper around yasna's `FromBER` trait that sets BER mode and eliminates the
/// `parse_der / from_ber` boilerplate.
pub trait FromBer: BERDecodable {
    fn from_ber<T: ?Sized + AsRef<[u8]>>(ber: &T) -> ASN1Result<Self> {
        parse_ber(ber.as_ref(), |r| <Self as BERDecodable>::decode_ber(r))
    }
}

impl<T: BERDecodable> FromDer for T {}
impl<T: BERDecodable> FromBer for T {}