1const std = @import("std");
 2const asn1 = @import("../asn1.zig");
 3
 4const der = asn1.der;
 5const Tag = asn1.Tag;
 6const FieldTag = asn1.FieldTag;
 7
 8/// An example that uses all ASN1 types and available implementation features.
 9const AllTypes = struct {
10    a: u8 = 0,
11    b: asn1.BitString,
12    c: C,
13    d: asn1.Opaque(Tag.universal(.string_utf8, false)),
14    e: asn1.Opaque(Tag.universal(.octetstring, false)),
15    f: ?u16,
16    g: ?Nested,
17    h: asn1.Any,
18
19    pub const asn1_tags = .{
20        .a = FieldTag.initExplicit(0, .context_specific),
21        .b = FieldTag.initExplicit(1, .context_specific),
22        .c = FieldTag.initImplicit(2, .context_specific),
23        .g = FieldTag.initImplicit(3, .context_specific),
24    };
25
26    const C = enum {
27        a,
28        b,
29
30        pub const oids = asn1.Oid.StaticMap(@This()).initComptime(.{
31            .a = "1.2.3.4",
32            .b = "1.2.3.5",
33        });
34    };
35
36    const Nested = struct {
37        inner: Asn1T,
38        sum: i16,
39
40        const Asn1T = struct { a: u8, b: i16 };
41
42        pub fn decodeDer(decoder: *der.Decoder) !Nested {
43            const inner = try decoder.any(Asn1T);
44            return Nested{ .inner = inner, .sum = inner.a + inner.b };
45        }
46
47        pub fn encodeDer(self: Nested, encoder: *der.Encoder) !void {
48            try encoder.any(self.inner);
49        }
50    };
51};
52
53test AllTypes {
54    const expected = AllTypes{
55        .a = 2,
56        .b = asn1.BitString{ .bytes = &[_]u8{ 0x04, 0xa0 } },
57        .c = .a,
58        .d = .{ .bytes = "asdf" },
59        .e = .{ .bytes = "fdsa" },
60        .f = (1 << 8) + 1,
61        .g = .{ .inner = .{ .a = 4, .b = 5 }, .sum = 9 },
62        .h = .{ .tag = Tag.init(.string_ia5, false, .universal), .bytes = "asdf" },
63    };
64    // https://lapo.it/asn1js/#MC-gAwIBAqEFAwMABKCCAyoDBAwEYXNkZgQEZmRzYQICAQGjBgIBBAIBBRYEYXNkZg
65    const path = "./der/testdata/all_types.der";
66    const encoded = @embedFile(path);
67    const actual = try asn1.der.decode(AllTypes, encoded);
68    try std.testing.expectEqualDeep(expected, actual);
69
70    const allocator = std.testing.allocator;
71    const buf = try asn1.der.encode(allocator, expected);
72    defer allocator.free(buf);
73    try std.testing.expectEqualSlices(u8, encoded, buf);
74
75    // Use this to update test file.
76    // const dir = try std.fs.cwd().openDir("lib/std/crypto/asn1", .{});
77    // var file = try dir.createFile(path, .{});
78    // defer file.close();
79    // try file.writeAll(buf);
80}