mirror of
https://codeberg.org/ziglang/zig.git
synced 2025-12-06 22:04:21 +00:00
a7122b7323
std.crypto: add constant-time codecs Add constant-time hex/base64 codecs designed to process cryptographic secrets, adapted from libsodium's implementations. Introduce a `crypto.codecs` namespace for crypto-related encoders and decoders. Move ASN.1 codecs to this namespace. This will also naturally accommodate the proposed PEM codecs.
55 lines
1.8 KiB
Zig
55 lines
1.8 KiB
Zig
//! Distinguised Encoding Rules as defined in X.690 and X.691.
|
|
//!
|
|
//! Subset of Basic Encoding Rules (BER) which eliminates flexibility in
|
|
//! an effort to acheive normality. Used in PKI.
|
|
const std = @import("std");
|
|
const asn1 = @import("../asn1.zig");
|
|
|
|
pub const Decoder = @import("der/Decoder.zig");
|
|
pub const Encoder = @import("der/Encoder.zig");
|
|
|
|
pub fn decode(comptime T: type, encoded: []const u8) !T {
|
|
var decoder = Decoder{ .bytes = encoded };
|
|
const res = try decoder.any(T);
|
|
std.debug.assert(decoder.index == encoded.len);
|
|
return res;
|
|
}
|
|
|
|
/// Caller owns returned memory.
|
|
pub fn encode(allocator: std.mem.Allocator, value: anytype) ![]u8 {
|
|
var encoder = Encoder.init(allocator);
|
|
defer encoder.deinit();
|
|
try encoder.any(value);
|
|
return try encoder.buffer.toOwnedSlice();
|
|
}
|
|
|
|
test encode {
|
|
// https://lapo.it/asn1js/#MAgGAyoDBAIBBA
|
|
const Value = struct { a: asn1.Oid, b: i32 };
|
|
const test_case = .{
|
|
.value = Value{ .a = asn1.Oid.fromDotComptime("1.2.3.4"), .b = 4 },
|
|
.encoded = &[_]u8{ 0x30, 0x08, 0x06, 0x03, 0x2A, 0x03, 0x04, 0x02, 0x01, 0x04 },
|
|
};
|
|
const allocator = std.testing.allocator;
|
|
const actual = try encode(allocator, test_case.value);
|
|
defer allocator.free(actual);
|
|
|
|
try std.testing.expectEqualSlices(u8, test_case.encoded, actual);
|
|
}
|
|
|
|
test decode {
|
|
// https://lapo.it/asn1js/#MAgGAyoDBAIBBA
|
|
const Value = struct { a: asn1.Oid, b: i32 };
|
|
const test_case = .{
|
|
.value = Value{ .a = asn1.Oid.fromDotComptime("1.2.3.4"), .b = 4 },
|
|
.encoded = &[_]u8{ 0x30, 0x08, 0x06, 0x03, 0x2A, 0x03, 0x04, 0x02, 0x01, 0x04 },
|
|
};
|
|
const decoded = try decode(Value, test_case.encoded);
|
|
|
|
try std.testing.expectEqualDeep(test_case.value, decoded);
|
|
}
|
|
|
|
test {
|
|
_ = Decoder;
|
|
_ = Encoder;
|
|
}
|