Zig-jwt

A JWT library for zig.

Env

• Zig >= 0.14.0-dev.2851+b074fb7dd

Adding zig-jwt as a dependency

Add the dependency to your project:

zig fetch --save=zig-jwt git+https://github.com/deatil/zig-jwt#main

or use local path to add dependency at build.zig.zon file

.{
    .dependencies = .{
        .@"zig-jwt" = .{
            .path = "./lib/zig-jwt",
        },
        ...
    }
}

And the following to your build.zig file:

const zig_jwt_dep = b.dependency("zig-jwt", .{});
exe.root_module.addImport("zig-jwt", zig_jwt_dep.module("zig-jwt"));

The zig-jwt structure can be imported in your application with:

const zig_jwt = @import("zig-jwt");

Get Starting

const std = @import("std");
const jwt = @import("zig-jwt");

pub fn main() !void {
    const alloc = std.heap.page_allocator;

    const kp = jwt.eddsa.Ed25519.KeyPair.generate();

    const claims = .{
        .aud = "example.com",
        .sub = "foo",
    };

    const s = jwt.SigningMethodEdDSA.init(alloc);
    const token_string = try s.make(claims, kp.secret_key);
    
    // output: 
    // make jwt: eyJ0eXAiOiJKV1QiLCJhbGciOiJFZERTQSJ9.eyJhdWQiOiJleGFtcGxlLmNvbSIsInN1YiI6ImZvbyJ9.8aYTV-9_Z1RQUPepUlut9gvniX_Cx_z8P60Z5FbnMMgNLPNP29ZtNG3k6pcU2TY_O3DkSsdxbN2HkmgvjDUPBg
    std.debug.print("make jwt: {s} \n", .{token_string});

    const p = jwt.SigningMethodEdDSA.init(alloc);
    var parsed = try p.parse(token_string, kp.public_key);
    
    // output: 
    // claims aud: example.com
    const claims2 = try parsed.getClaims();
    std.debug.print("claims aud: {s} \n", .{claims2.object.get("aud").?.string});
}

Signing Methods

The JWT library have signing methods:

• RS256: jwt.SigningMethodRS256

• RS384: jwt.SigningMethodRS384

• RS512: jwt.SigningMethodRS512

• PS256: jwt.SigningMethodPS256

• PS384: jwt.SigningMethodPS384

• PS512: jwt.SigningMethodPS512

• ES256: jwt.SigningMethodES256

• ES384: jwt.SigningMethodES384

• EdDSA: jwt.SigningMethodEdDSA

• ED25519: jwt.SigningMethodED25519

• HS256: jwt.SigningMethodHS256

• HS384: jwt.SigningMethodHS384

• HS512: jwt.SigningMethodHS512

• none: jwt.SigningMethodNone

LICENSE

• The library LICENSE is Apache2, using the library need keep the LICENSE.

Copyright

• Copyright deatil(https://github.com/deatil).