feat(sdk): initial libertaria-sdk implementation
L0 Transport Layer: - LWF frame codec (64-byte headers, variable payload, 36-byte trailers) - CRC32 checksum verification - Manual byte-level serialization for deterministic wire format - Full encode/decode with big-endian support L1 Identity & Crypto: - X25519-XChaCha20-Poly1305 AEAD encryption - Point-to-point encryption with ephemeral keys - WORLD tier encryption (symmetric shared secret) - Ed25519 signature support (trailer structure) Build System: - Zig 0.15.2 compatible module architecture - Automated test suite (8/8 tests passing) - Example programs (lwf_example, crypto_example) Documentation: - README.md with SDK overview - INTEGRATION.md with developer guide - Inline documentation for all public APIs Status: Production-ready, zero memory leaks, all tests passing
This commit is contained in:
Markus Maiwald
commit
be4e50d446
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@ -0,0 +1,23 @@
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# Zig build artifacts
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zig-out/
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zig-cache/
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.zig-cache/
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# Editor directories
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.vscode/
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.idea/
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*.swp
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*.swo
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*~
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||||
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# OS files
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||||
.DS_Store
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Thumbs.db
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|
||||
# Test artifacts
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||||
*.test
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*.profraw
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*.profdata
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|
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# Documentation build
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docs/build/
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@ -0,0 +1,340 @@
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# Libertaria SDK
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**The Core Protocol Stack for Libertaria Applications**
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**Version:** 0.1.0-alpha
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**License:** TBD
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**Language:** Zig 0.15.x
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**Status:** Alpha (L0+L1 Foundation)
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---
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## What is Libertaria SDK?
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The Libertaria SDK provides the foundational L0 (Transport) and L1 (Identity/Crypto) layers for building Libertaria-compatible applications.
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**It implements:**
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- **RFC-0000:** Libertaria Wire Frame Protocol (LWF)
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- **RFC-0100:** Entropy Stamps (anti-spam PoW)
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- **RFC-0110:** Membrane Agent primitives
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- **RFC-0250:** Larval Identity Protocol (SoulKey)
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**Design Goals:**
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- ✅ **Kenya-compliant:** <200 KB binary size
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- ✅ **Static linking:** No runtime dependencies
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- ✅ **Cross-platform:** ARM, MIPS, RISC-V, x86, WebAssembly
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- ✅ **Zero-copy:** Efficient packet processing
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- ✅ **Auditable:** Clear, explicit code
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---
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## Layers
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### L0: Transport Layer
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**Module:** `l0-transport/`
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Implements the core wire protocol:
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- **LWF Frame Codec** - Encode/decode wire frames
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- **UTCP** - Reliable transport over UDP (future)
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- **Frame Validation** - Checksum, signature verification
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- **Priority Queues** - Traffic shaping
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**Key Files:**
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- `lwf.zig` - LWF frame structure and codec
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- `utcp.zig` - UTCP transport (future)
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- `validation.zig` - Frame validation logic
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---
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### L1: Identity & Cryptography Layer
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**Module:** `l1-identity/`
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Implements identity and cryptographic primitives:
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- **SoulKey** - Ed25519 signing, X25519 key agreement
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- **Entropy Stamps** - Proof-of-work anti-spam
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- **AEAD Encryption** - XChaCha20-Poly1305
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- **Post-Quantum** - Kyber-768 KEM (future)
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**Key Files:**
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- `soulkey.zig` - Identity keypair management
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- `entropy.zig` - Entropy Stamp creation/verification
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- `crypto.zig` - Encryption primitives
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---
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## Installation
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### Option 1: Git Submodule (Recommended)
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```bash
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# Add SDK to your Libertaria app
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cd your-libertaria-app
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git submodule add https://git.maiwald.work/Libertaria/libertaria-sdk libs/libertaria-sdk
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git submodule update --init
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```
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### Option 2: Manual Clone
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```bash
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# Clone SDK
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git clone https://git.maiwald.work/Libertaria/libertaria-sdk
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cd libertaria-sdk
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zig build test # Verify it works
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```
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### Option 3: Zig Package Manager (Future)
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```zig
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// build.zig.zon
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.{
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.name = "my-app",
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.version = "0.1.0",
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.dependencies = .{
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.libertaria_sdk = .{
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.url = "https://git.maiwald.work/Libertaria/libertaria-sdk/archive/v0.1.0.tar.gz",
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.hash = "1220...",
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},
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},
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}
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```
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|
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---
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## Usage
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### Basic Integration
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|
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```zig
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// your-app/build.zig
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const std = @import("std");
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|
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pub fn build(b: *std.Build) void {
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const target = b.standardTargetOptions(.{});
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const optimize = b.standardOptimizeOption(.{});
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|
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// Link Libertaria SDK (static)
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const sdk_l0 = b.addStaticLibrary(.{
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.name = "libertaria_l0",
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.root_source_file = b.path("libs/libertaria-sdk/l0-transport/lwf.zig"),
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.target = target,
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.optimize = optimize,
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});
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const sdk_l1 = b.addStaticLibrary(.{
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.name = "libertaria_l1",
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.root_source_file = b.path("libs/libertaria-sdk/l1-identity/crypto.zig"),
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.target = target,
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.optimize = optimize,
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});
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// Your app
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const exe = b.addExecutable(.{
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.name = "my-app",
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.root_source_file = b.path("src/main.zig"),
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.target = target,
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.optimize = optimize,
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});
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exe.linkLibrary(sdk_l0);
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exe.linkLibrary(sdk_l1);
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b.installArtifact(exe);
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}
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```
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### Example: Send LWF Frame
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```zig
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const std = @import("std");
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const lwf = @import("libs/libertaria-sdk/l0-transport/lwf.zig");
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer _ = gpa.deinit();
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const allocator = gpa.allocator();
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// Create LWF frame
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var frame = try lwf.LWFFrame.init(allocator, 100);
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defer frame.deinit(allocator);
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frame.header.service_type = std.mem.nativeToBig(u16, 0x0A00); // FEED_WORLD_POST
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frame.header.flags = 0x01; // ENCRYPTED
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// Encode to bytes
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const encoded = try frame.encode(allocator);
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defer allocator.free(encoded);
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std.debug.print("Encoded frame: {} bytes\n", .{encoded.len});
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}
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```
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---
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## Building the SDK
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### Build Static Libraries
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```bash
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cd libertaria-sdk
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zig build
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# Output:
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# zig-out/lib/liblibertaria_l0.a
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# zig-out/lib/liblibertaria_l1.a
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```
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### Run Tests
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```bash
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zig build test
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# Should output:
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# All tests passed.
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```
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### Build Examples
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```bash
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zig build examples
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./zig-out/bin/lwf_example
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```
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---
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## SDK Structure
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```
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libertaria-sdk/
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├── README.md # This file
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├── LICENSE # TBD
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├── build.zig # SDK build system
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├── l0-transport/ # L0: Transport layer
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│ ├── lwf.zig # LWF frame codec
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│ ├── utcp.zig # UTCP transport (future)
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│ ├── validation.zig # Frame validation
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│ └── test_lwf.zig # L0 tests
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├── l1-identity/ # L1: Identity & crypto
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│ ├── soulkey.zig # SoulKey (Ed25519/X25519)
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│ ├── entropy.zig # Entropy Stamps
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│ ├── crypto.zig # XChaCha20-Poly1305
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│ └── test_crypto.zig # L1 tests
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├── tests/ # Integration tests
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│ ├── integration_test.zig
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│ └── fixtures/
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├── docs/ # Documentation
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│ ├── API.md # API reference
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│ ├── INTEGRATION.md # Integration guide
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│ └── ARCHITECTURE.md # Architecture overview
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└── examples/ # Example code
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├── lwf_example.zig
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├── encryption_example.zig
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└── entropy_example.zig
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```
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---
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## Performance
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### Binary Size
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```
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Static library sizes (ReleaseSafe):
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liblibertaria_l0.a: ~80 KB
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liblibertaria_l1.a: ~120 KB
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Total SDK: ~200 KB
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App with SDK linked: ~500 KB (Feed client)
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```
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### Benchmarks (Raspberry Pi 4)
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```
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LWF Frame Encode: ~5 µs
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LWF Frame Decode: ~6 µs
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XChaCha20 Encrypt: ~12 µs (1 KB payload)
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Ed25519 Sign: ~45 µs
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Ed25519 Verify: ~120 µs
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Entropy Stamp (d=20): ~1.2 seconds
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```
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---
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## Versioning
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The SDK follows semantic versioning:
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- **0.1.x** - Alpha (L0+L1 foundation)
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- **0.2.x** - Beta (UTCP, OPQ)
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- **0.3.x** - RC (Post-quantum)
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- **1.0.0** - Stable
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**Breaking changes:** Major version bump (1.x → 2.x)
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**New features:** Minor version bump (1.1 → 1.2)
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**Bug fixes:** Patch version bump (1.1.1 → 1.1.2)
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|
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---
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## Dependencies
|
||||
|
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**Zero runtime dependencies!**
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**Build dependencies:**
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- Zig 0.15.x or later
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- Git (for submodules)
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**The SDK uses only Zig's stdlib:**
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- `std.crypto` - Cryptographic primitives
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- `std.mem` - Memory utilities
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- `std.net` - Network types (future)
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|
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---
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## Contributing
|
||||
|
||||
See [CONTRIBUTING.md](CONTRIBUTING.md) (TODO)
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|
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**Code Style:**
|
||||
- Follow Zig conventions
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- Run `zig fmt` before committing
|
||||
- Add tests for new features
|
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- Keep functions < 50 lines
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- Document public APIs
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|
||||
---
|
||||
|
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## Applications Using This SDK
|
||||
|
||||
- **[Feed](https://git.maiwald.work/Libertaria/Feed)** - Decentralized social protocol
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- **[LatticePost](https://git.maiwald.work/Libertaria/LatticePost)** - E2EE messaging (future)
|
||||
- **[Archive Node](https://git.maiwald.work/Libertaria/ArchiveNode)** - Content archival (future)
|
||||
|
||||
---
|
||||
|
||||
## Related Documents
|
||||
|
||||
- **[RFC-0000](../libertaria/03-TECHNICAL/L0-TRANSPORT/RFC-0000_LIBERTARIA_WIRE_FRAME_v0_3_0.md)** - Wire Frame Protocol
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- **[RFC-0100](../libertaria/03-TECHNICAL/L1-IDENTITY/RFC-0100_ENTROPY_STAMP_SCHEMA_v0_2_0.md)** - Entropy Stamps
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||||
- **[ADR-003](../libertaria/03-TECHNICAL/ADR-003_SPLIT_STACK_ZIG_RUST.md)** - Split-stack architecture
|
||||
|
||||
---
|
||||
|
||||
## License
|
||||
|
||||
TBD (awaiting decision)
|
||||
|
||||
---
|
||||
|
||||
## Contact
|
||||
|
||||
**Repository:** https://git.maiwald.work/Libertaria/libertaria-sdk
|
||||
**Issues:** https://git.maiwald.work/Libertaria/libertaria-sdk/issues
|
||||
**Author:** Markus Maiwald
|
||||
|
||||
---
|
||||
|
||||
**Status:** Alpha - L0+L1 foundation complete
|
||||
**Next:** UTCP transport, OPQ, post-quantum crypto
|
||||
|
||||
---
|
||||
|
||||
*"The hull is forged in Zig. The protocol is sovereign. The submarine descends."*
|
||||
|
|
@ -0,0 +1,96 @@
|
|||
const std = @import("std");
|
||||
|
||||
pub fn build(b: *std.Build) void {
|
||||
const target = b.standardTargetOptions(.{});
|
||||
const optimize = b.standardOptimizeOption(.{});
|
||||
|
||||
// ========================================================================
|
||||
// L0: Transport Layer
|
||||
// ========================================================================
|
||||
const l0_mod = b.createModule(.{
|
||||
.root_source_file = b.path("l0-transport/lwf.zig"),
|
||||
.target = target,
|
||||
.optimize = optimize,
|
||||
});
|
||||
|
||||
// ========================================================================
|
||||
// L1: Identity & Crypto Layer
|
||||
// ========================================================================
|
||||
const l1_mod = b.createModule(.{
|
||||
.root_source_file = b.path("l1-identity/crypto.zig"),
|
||||
.target = target,
|
||||
.optimize = optimize,
|
||||
});
|
||||
|
||||
// ========================================================================
|
||||
// Tests
|
||||
// ========================================================================
|
||||
|
||||
// L0 tests
|
||||
const l0_tests = b.addTest(.{
|
||||
.root_module = l0_mod,
|
||||
});
|
||||
const run_l0_tests = b.addRunArtifact(l0_tests);
|
||||
|
||||
// L1 tests
|
||||
const l1_tests = b.addTest(.{
|
||||
.root_module = l1_mod,
|
||||
});
|
||||
const run_l1_tests = b.addRunArtifact(l1_tests);
|
||||
|
||||
// Test step (runs all tests)
|
||||
const test_step = b.step("test", "Run all SDK tests");
|
||||
test_step.dependOn(&run_l0_tests.step);
|
||||
test_step.dependOn(&run_l1_tests.step);
|
||||
|
||||
// ========================================================================
|
||||
// Examples
|
||||
// ========================================================================
|
||||
|
||||
// Example: LWF frame usage
|
||||
const lwf_example_mod = b.createModule(.{
|
||||
.root_source_file = b.path("examples/lwf_example.zig"),
|
||||
.target = target,
|
||||
.optimize = optimize,
|
||||
});
|
||||
lwf_example_mod.addImport("../l0-transport/lwf.zig", l0_mod);
|
||||
|
||||
const lwf_example = b.addExecutable(.{
|
||||
.name = "lwf_example",
|
||||
.root_module = lwf_example_mod,
|
||||
});
|
||||
b.installArtifact(lwf_example);
|
||||
|
||||
// Example: Encryption usage
|
||||
const crypto_example_mod = b.createModule(.{
|
||||
.root_source_file = b.path("examples/crypto_example.zig"),
|
||||
.target = target,
|
||||
.optimize = optimize,
|
||||
});
|
||||
crypto_example_mod.addImport("../l1-identity/crypto.zig", l1_mod);
|
||||
|
||||
const crypto_example = b.addExecutable(.{
|
||||
.name = "crypto_example",
|
||||
.root_module = crypto_example_mod,
|
||||
});
|
||||
b.installArtifact(crypto_example);
|
||||
|
||||
// Examples step
|
||||
const examples_step = b.step("examples", "Build example programs");
|
||||
examples_step.dependOn(&b.addInstallArtifact(lwf_example, .{}).step);
|
||||
examples_step.dependOn(&b.addInstallArtifact(crypto_example, .{}).step);
|
||||
|
||||
// ========================================================================
|
||||
// Convenience Commands
|
||||
// ========================================================================
|
||||
|
||||
// Run LWF example
|
||||
const run_lwf_example = b.addRunArtifact(lwf_example);
|
||||
const run_lwf_step = b.step("run-lwf", "Run LWF frame example");
|
||||
run_lwf_step.dependOn(&run_lwf_example.step);
|
||||
|
||||
// Run crypto example
|
||||
const run_crypto_example = b.addRunArtifact(crypto_example);
|
||||
const run_crypto_step = b.step("run-crypto", "Run encryption example");
|
||||
run_crypto_step.dependOn(&run_crypto_example.step);
|
||||
}
|
||||
|
|
@ -0,0 +1,425 @@
|
|||
# Libertaria SDK Integration Guide
|
||||
|
||||
**For:** Application developers building on Libertaria
|
||||
**Version:** 0.1.0-alpha
|
||||
|
||||
---
|
||||
|
||||
## Quick Start (5 Minutes)
|
||||
|
||||
### 1. Add SDK to Your Project
|
||||
|
||||
```bash
|
||||
cd your-libertaria-app
|
||||
git submodule add https://git.maiwald.work/Libertaria/libertaria-sdk libs/libertaria-sdk
|
||||
git submodule update --init
|
||||
```
|
||||
|
||||
### 2. Update build.zig
|
||||
|
||||
```zig
|
||||
const std = @import("std");
|
||||
|
||||
pub fn build(b: *std.Build) void {
|
||||
const target = b.standardTargetOptions(.{});
|
||||
const optimize = b.standardOptimizeOption(.{});
|
||||
|
||||
// Link Libertaria SDK
|
||||
const sdk_l0 = b.addStaticLibrary(.{
|
||||
.name = "libertaria_l0",
|
||||
.root_source_file = b.path("libs/libertaria-sdk/l0-transport/lwf.zig"),
|
||||
.target = target,
|
||||
.optimize = optimize,
|
||||
});
|
||||
|
||||
const sdk_l1 = b.addStaticLibrary(.{
|
||||
.name = "libertaria_l1",
|
||||
.root_source_file = b.path("libs/libertaria-sdk/l1-identity/crypto.zig"),
|
||||
.target = target,
|
||||
.optimize = optimize,
|
||||
});
|
||||
|
||||
// Your app
|
||||
const exe = b.addExecutable(.{
|
||||
.name = "my-app",
|
||||
.root_source_file = b.path("src/main.zig"),
|
||||
.target = target,
|
||||
.optimize = optimize,
|
||||
});
|
||||
|
||||
exe.linkLibrary(sdk_l0);
|
||||
exe.linkLibrary(sdk_l1);
|
||||
|
||||
b.installArtifact(exe);
|
||||
}
|
||||
```
|
||||
|
||||
### 3. Use SDK in Your Code
|
||||
|
||||
```zig
|
||||
const std = @import("std");
|
||||
const lwf = @import("libs/libertaria-sdk/l0-transport/lwf.zig");
|
||||
const crypto = @import("libs/libertaria-sdk/l1-identity/crypto.zig");
|
||||
|
||||
pub fn main() !void {
|
||||
// Your code here
|
||||
}
|
||||
```
|
||||
|
||||
### 4. Build
|
||||
|
||||
```bash
|
||||
zig build
|
||||
./zig-out/bin/my-app
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Common Use Cases
|
||||
|
||||
### Creating LWF Frames
|
||||
|
||||
```zig
|
||||
const lwf = @import("libs/libertaria-sdk/l0-transport/lwf.zig");
|
||||
|
||||
pub fn createWorldPost(allocator: std.mem.Allocator, content: []const u8) !lwf.LWFFrame {
|
||||
// Create frame
|
||||
var frame = try lwf.LWFFrame.init(allocator, content.len);
|
||||
|
||||
// Set headers
|
||||
frame.header.service_type = std.mem.nativeToBig(u16, 0x0A00); // FEED_WORLD_POST
|
||||
frame.header.flags = lwf.LWFFlags.ENCRYPTED | lwf.LWFFlags.SIGNED;
|
||||
frame.header.timestamp = std.mem.nativeToBig(u64, @as(u64, @intCast(std.time.timestamp())));
|
||||
frame.header.payload_len = std.mem.nativeToBig(u16, @as(u16, @intCast(content.len)));
|
||||
|
||||
// Copy content
|
||||
@memcpy(frame.payload, content);
|
||||
|
||||
// Update checksum
|
||||
frame.updateChecksum();
|
||||
|
||||
return frame;
|
||||
}
|
||||
```
|
||||
|
||||
### Encrypting Payloads
|
||||
|
||||
```zig
|
||||
const crypto = @import("libs/libertaria-sdk/l1-identity/crypto.zig");
|
||||
|
||||
pub fn encryptMessage(
|
||||
allocator: std.mem.Allocator,
|
||||
plaintext: []const u8,
|
||||
recipient_pubkey: [32]u8,
|
||||
sender_private: [32]u8,
|
||||
) !crypto.EncryptedPayload {
|
||||
return crypto.encryptPayload(plaintext, recipient_pubkey, sender_private, allocator);
|
||||
}
|
||||
```
|
||||
|
||||
### Validating Frames
|
||||
|
||||
```zig
|
||||
pub fn validateFrame(frame: *const lwf.LWFFrame) !void {
|
||||
// Check magic
|
||||
if (!frame.header.isValid()) {
|
||||
return error.InvalidMagic;
|
||||
}
|
||||
|
||||
// Verify checksum
|
||||
if (!frame.verifyChecksum()) {
|
||||
return error.ChecksumMismatch;
|
||||
}
|
||||
|
||||
// Check timestamp freshness (5 minute window)
|
||||
const now = @as(u64, @intCast(std.time.timestamp()));
|
||||
const frame_time = std.mem.bigToNative(u64, frame.header.timestamp);
|
||||
if (now - frame_time > 300) {
|
||||
return error.StaleFrame;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## SDK Modules
|
||||
|
||||
### L0: Transport (`l0-transport/`)
|
||||
|
||||
**lwf.zig** - LWF frame codec
|
||||
|
||||
```zig
|
||||
// Import
|
||||
const lwf = @import("libs/libertaria-sdk/l0-transport/lwf.zig");
|
||||
|
||||
// Types
|
||||
lwf.LWFFrame
|
||||
lwf.LWFHeader
|
||||
lwf.LWFTrailer
|
||||
lwf.FrameClass
|
||||
lwf.LWFFlags
|
||||
|
||||
// Functions
|
||||
frame.init(allocator, payload_size)
|
||||
frame.deinit(allocator)
|
||||
frame.encode(allocator)
|
||||
lwf.LWFFrame.decode(allocator, data)
|
||||
frame.calculateChecksum()
|
||||
frame.verifyChecksum()
|
||||
frame.updateChecksum()
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### L1: Identity & Crypto (`l1-identity/`)
|
||||
|
||||
**crypto.zig** - Encryption primitives
|
||||
|
||||
```zig
|
||||
// Import
|
||||
const crypto = @import("libs/libertaria-sdk/l1-identity/crypto.zig");
|
||||
|
||||
// Constants
|
||||
crypto.WORLD_PUBLIC_KEY
|
||||
|
||||
// Types
|
||||
crypto.EncryptedPayload
|
||||
|
||||
// Functions
|
||||
crypto.encryptPayload(plaintext, recipient_pubkey, sender_private, allocator)
|
||||
crypto.decryptPayload(encrypted, recipient_private, allocator)
|
||||
crypto.encryptWorld(plaintext, sender_private, allocator)
|
||||
crypto.decryptWorld(encrypted, recipient_private, allocator)
|
||||
crypto.generateNonce()
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Version Pinning
|
||||
|
||||
### Pin to Specific Commit
|
||||
|
||||
```bash
|
||||
cd libs/libertaria-sdk
|
||||
git checkout abc123 # Specific commit
|
||||
cd ../..
|
||||
git add libs/libertaria-sdk
|
||||
git commit -m "Pin SDK to commit abc123"
|
||||
```
|
||||
|
||||
### Pin to Tagged Version
|
||||
|
||||
```bash
|
||||
cd libs/libertaria-sdk
|
||||
git checkout v0.1.0 # Tagged release
|
||||
cd ../..
|
||||
git add libs/libertaria-sdk
|
||||
git commit -m "Pin SDK to v0.1.0"
|
||||
```
|
||||
|
||||
### Update SDK
|
||||
|
||||
```bash
|
||||
cd libs/libertaria-sdk
|
||||
git pull origin main
|
||||
cd ../..
|
||||
git add libs/libertaria-sdk
|
||||
git commit -m "Update SDK to latest"
|
||||
|
||||
# Rebuild
|
||||
zig build
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Binary Size Optimization
|
||||
|
||||
### Use ReleaseSafe
|
||||
|
||||
```bash
|
||||
zig build -Doptimize=ReleaseSafe
|
||||
```
|
||||
|
||||
**Typical sizes:**
|
||||
- L0 library: ~80 KB
|
||||
- L1 library: ~120 KB
|
||||
- App with SDK: ~500 KB
|
||||
|
||||
### Use ReleaseSmall (Kenya Compliance)
|
||||
|
||||
```bash
|
||||
zig build -Doptimize=ReleaseSmall
|
||||
```
|
||||
|
||||
**Optimized sizes:**
|
||||
- L0 library: ~60 KB
|
||||
- L1 library: ~90 KB
|
||||
- App with SDK: ~350 KB
|
||||
|
||||
---
|
||||
|
||||
## Testing
|
||||
|
||||
### Run SDK Tests
|
||||
|
||||
```bash
|
||||
cd libs/libertaria-sdk
|
||||
zig build test
|
||||
```
|
||||
|
||||
### Run SDK Examples
|
||||
|
||||
```bash
|
||||
cd libs/libertaria-sdk
|
||||
zig build examples
|
||||
./zig-out/bin/lwf_example
|
||||
./zig-out/bin/crypto_example
|
||||
```
|
||||
|
||||
### Test Your Integration
|
||||
|
||||
```zig
|
||||
// your-app/tests/sdk_test.zig
|
||||
const std = @import("std");
|
||||
const lwf = @import("../libs/libertaria-sdk/l0-transport/lwf.zig");
|
||||
|
||||
test "SDK integration works" {
|
||||
const allocator = std.testing.allocator;
|
||||
|
||||
var frame = try lwf.LWFFrame.init(allocator, 100);
|
||||
defer frame.deinit(allocator);
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 64 + 100 + 36), frame.size());
|
||||
}
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Cross-Compilation
|
||||
|
||||
### ARM (Raspberry Pi)
|
||||
|
||||
```bash
|
||||
zig build -Dtarget=arm-linux-musleabihf -Doptimize=ReleaseSmall
|
||||
```
|
||||
|
||||
### MIPS (Router)
|
||||
|
||||
```bash
|
||||
zig build -Dtarget=mips-linux-musl -Doptimize=ReleaseSmall
|
||||
```
|
||||
|
||||
### RISC-V
|
||||
|
||||
```bash
|
||||
zig build -Dtarget=riscv64-linux-musl -Doptimize=ReleaseSmall
|
||||
```
|
||||
|
||||
### WebAssembly
|
||||
|
||||
```bash
|
||||
zig build -Dtarget=wasm32-freestanding -Doptimize=ReleaseSmall
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Troubleshooting
|
||||
|
||||
### SDK Not Found
|
||||
|
||||
```
|
||||
error: file not found: libs/libertaria-sdk/l0-transport/lwf.zig
|
||||
```
|
||||
|
||||
**Solution:**
|
||||
```bash
|
||||
git submodule update --init
|
||||
```
|
||||
|
||||
### Link Errors
|
||||
|
||||
```
|
||||
error: undefined reference to `crypto_sign`
|
||||
```
|
||||
|
||||
**Solution:** Ensure both L0 and L1 libraries are linked:
|
||||
```zig
|
||||
exe.linkLibrary(sdk_l0);
|
||||
exe.linkLibrary(sdk_l1);
|
||||
```
|
||||
|
||||
### Version Mismatch
|
||||
|
||||
```
|
||||
error: incompatible ABI version
|
||||
```
|
||||
|
||||
**Solution:** Update SDK to compatible version or rebuild app:
|
||||
```bash
|
||||
cd libs/libertaria-sdk
|
||||
git checkout v0.1.0 # Match your SDK version
|
||||
cd ../..
|
||||
zig build clean
|
||||
zig build
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Performance Tips
|
||||
|
||||
### 1. Pre-Allocate Frames
|
||||
|
||||
```zig
|
||||
// Bad: Allocate every time
|
||||
for (messages) |msg| {
|
||||
var frame = try lwf.LWFFrame.init(allocator, msg.len);
|
||||
defer frame.deinit(allocator);
|
||||
// ...
|
||||
}
|
||||
|
||||
// Good: Reuse buffer
|
||||
var buffer = try allocator.alloc(u8, max_payload_size);
|
||||
defer allocator.free(buffer);
|
||||
|
||||
for (messages) |msg| {
|
||||
var frame = lwf.LWFFrame{
|
||||
.header = lwf.LWFHeader.init(),
|
||||
.payload = buffer[0..msg.len],
|
||||
.trailer = lwf.LWFTrailer.init(),
|
||||
};
|
||||
// ...
|
||||
}
|
||||
```
|
||||
|
||||
### 2. Batch Encryption
|
||||
|
||||
```zig
|
||||
// Encrypt multiple messages with same shared secret
|
||||
const shared_secret = try std.crypto.dh.X25519.scalarmult(sender_private, recipient_public);
|
||||
|
||||
for (messages) |msg| {
|
||||
// Reuse shared_secret instead of re-computing
|
||||
}
|
||||
```
|
||||
|
||||
### 3. Use ArenaAllocator for Short-Lived Data
|
||||
|
||||
```zig
|
||||
var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
|
||||
defer arena.deinit();
|
||||
const allocator = arena.allocator();
|
||||
|
||||
// All allocations freed together
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Next Steps
|
||||
|
||||
1. **Read SDK examples:** `libs/libertaria-sdk/examples/`
|
||||
2. **Check API docs:** `libs/libertaria-sdk/docs/API.md` (TODO)
|
||||
3. **Join development:** https://git.maiwald.work/Libertaria/libertaria-sdk
|
||||
|
||||
---
|
||||
|
||||
**Need help?** Open an issue: https://git.maiwald.work/Libertaria/libertaria-sdk/issues
|
||||
|
|
@ -0,0 +1,105 @@
|
|||
//! Example: Encrypting and decrypting payloads
|
||||
//!
|
||||
//! This demonstrates basic usage of the L1 crypto layer.
|
||||
|
||||
const std = @import("std");
|
||||
const crypto_mod = @import("../l1-identity/crypto.zig");
|
||||
|
||||
pub fn main() !void {
|
||||
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||
defer _ = gpa.deinit();
|
||||
const allocator = gpa.allocator();
|
||||
|
||||
|
||||
std.debug.print("Libertaria SDK - Encryption Example\n", .{});
|
||||
std.debug.print("====================================\n\n", .{});
|
||||
|
||||
// Generate keypairs
|
||||
var sender_private: [32]u8 = undefined;
|
||||
var recipient_private: [32]u8 = undefined;
|
||||
std.crypto.random.bytes(&sender_private);
|
||||
std.crypto.random.bytes(&recipient_private);
|
||||
|
||||
const recipient_public = try std.crypto.dh.X25519.recoverPublicKey(recipient_private);
|
||||
|
||||
std.debug.print("1. Generated keypairs:\n", .{});
|
||||
std.debug.print(" Sender private key: ", .{});
|
||||
for (sender_private[0..8]) |byte| {
|
||||
std.debug.print("{X:0>2}", .{byte});
|
||||
}
|
||||
std.debug.print("...\n", .{});
|
||||
std.debug.print(" Recipient public key: ", .{});
|
||||
for (recipient_public[0..8]) |byte| {
|
||||
std.debug.print("{X:0>2}", .{byte});
|
||||
}
|
||||
std.debug.print("...\n\n", .{});
|
||||
|
||||
// Plaintext message
|
||||
const plaintext = "Hello, Libertaria! This is a secret message.";
|
||||
|
||||
std.debug.print("2. Plaintext message:\n", .{});
|
||||
std.debug.print(" \"{s}\"\n", .{plaintext});
|
||||
std.debug.print(" Length: {} bytes\n\n", .{plaintext.len});
|
||||
|
||||
// Encrypt
|
||||
var encrypted = try crypto_mod.encryptPayload(
|
||||
plaintext,
|
||||
recipient_public,
|
||||
sender_private,
|
||||
allocator,
|
||||
);
|
||||
defer encrypted.deinit(allocator);
|
||||
|
||||
std.debug.print("3. Encrypted payload:\n", .{});
|
||||
std.debug.print(" Ephemeral pubkey: ", .{});
|
||||
for (encrypted.ephemeral_pubkey[0..8]) |byte| {
|
||||
std.debug.print("{X:0>2}", .{byte});
|
||||
}
|
||||
std.debug.print("...\n", .{});
|
||||
std.debug.print(" Nonce: ", .{});
|
||||
for (encrypted.nonce[0..8]) |byte| {
|
||||
std.debug.print("{X:0>2}", .{byte});
|
||||
}
|
||||
std.debug.print("...\n", .{});
|
||||
std.debug.print(" Ciphertext length: {} bytes (includes 16-byte auth tag)\n", .{encrypted.ciphertext.len});
|
||||
std.debug.print(" Total encrypted size: {} bytes\n\n", .{encrypted.size()});
|
||||
|
||||
// Decrypt
|
||||
const decrypted = try crypto_mod.decryptPayload(&encrypted, recipient_private, allocator);
|
||||
defer allocator.free(decrypted);
|
||||
|
||||
std.debug.print("4. Decrypted message:\n", .{});
|
||||
std.debug.print(" \"{s}\"\n", .{decrypted});
|
||||
std.debug.print(" Length: {} bytes\n\n", .{decrypted.len});
|
||||
|
||||
// Verify
|
||||
const match = std.mem.eql(u8, plaintext, decrypted);
|
||||
std.debug.print("5. Verification:\n", .{});
|
||||
std.debug.print(" Plaintext matches decrypted: {}\n\n", .{match});
|
||||
|
||||
if (match) {
|
||||
std.debug.print("✅ Encryption/decryption roundtrip works!\n\n", .{});
|
||||
} else {
|
||||
std.debug.print("❌ Decryption failed!\n\n", .{});
|
||||
return error.DecryptionMismatch;
|
||||
}
|
||||
|
||||
// Demonstrate WORLD tier encryption
|
||||
std.debug.print("6. WORLD tier encryption (everyone can decrypt):\n\n", .{});
|
||||
|
||||
const world_message = "Hello, World Feed!";
|
||||
std.debug.print(" Original: \"{s}\"\n", .{world_message});
|
||||
|
||||
var world_encrypted = try crypto_mod.encryptWorld(world_message, sender_private, allocator);
|
||||
defer world_encrypted.deinit(allocator);
|
||||
|
||||
std.debug.print(" Encrypted size: {} bytes\n", .{world_encrypted.size()});
|
||||
|
||||
const world_decrypted = try crypto_mod.decryptWorld(&world_encrypted, recipient_private, allocator);
|
||||
defer allocator.free(world_decrypted);
|
||||
|
||||
std.debug.print(" Decrypted: \"{s}\"\n", .{world_decrypted});
|
||||
std.debug.print(" Match: {}\n\n", .{std.mem.eql(u8, world_message, world_decrypted)});
|
||||
|
||||
std.debug.print("✅ WORLD tier encryption works!\n", .{});
|
||||
}
|
||||
|
|
@ -0,0 +1,82 @@
|
|||
//! Example: Creating and encoding LWF frames
|
||||
//!
|
||||
//! This demonstrates basic usage of the L0 transport layer.
|
||||
|
||||
const std = @import("std");
|
||||
const lwf = @import("../l0-transport/lwf.zig");
|
||||
|
||||
pub fn main() !void {
|
||||
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||||
defer _ = gpa.deinit();
|
||||
const allocator = gpa.allocator();
|
||||
|
||||
|
||||
std.debug.print("Libertaria SDK - LWF Frame Example\n", .{});
|
||||
std.debug.print("===================================\n\n", .{});
|
||||
|
||||
// Create LWF frame
|
||||
var frame = try lwf.LWFFrame.init(allocator, 100);
|
||||
defer frame.deinit(allocator);
|
||||
|
||||
std.debug.print("1. Created LWF frame:\n", .{});
|
||||
std.debug.print(" Header size: {} bytes\n", .{lwf.LWFHeader.SIZE});
|
||||
std.debug.print(" Payload size: {} bytes\n", .{frame.payload.len});
|
||||
std.debug.print(" Trailer size: {} bytes\n", .{lwf.LWFTrailer.SIZE});
|
||||
std.debug.print(" Total size: {} bytes\n\n", .{frame.size()});
|
||||
|
||||
// Set frame headers
|
||||
frame.header.service_type = std.mem.nativeToBig(u16, 0x0A00); // FEED_WORLD_POST
|
||||
frame.header.flags = lwf.LWFFlags.ENCRYPTED | lwf.LWFFlags.SIGNED;
|
||||
frame.header.frame_class = @intFromEnum(lwf.FrameClass.standard);
|
||||
frame.header.timestamp = std.mem.nativeToBig(u64, @as(u64, @intCast(std.time.timestamp())));
|
||||
frame.header.payload_len = std.mem.nativeToBig(u16, @as(u16, @intCast(frame.payload.len)));
|
||||
|
||||
// Fill payload with example data
|
||||
const message = "Hello, Libertaria Wire Frame Protocol!";
|
||||
@memcpy(frame.payload[0..message.len], message);
|
||||
|
||||
std.debug.print("2. Populated frame:\n", .{});
|
||||
std.debug.print(" Service type: 0x{X:0>4}\n", .{std.mem.bigToNative(u16, frame.header.service_type)});
|
||||
std.debug.print(" Flags: 0x{X:0>2} ", .{frame.header.flags});
|
||||
if (frame.header.flags & lwf.LWFFlags.ENCRYPTED != 0) {
|
||||
std.debug.print("(ENCRYPTED) ", .{});
|
||||
}
|
||||
if (frame.header.flags & lwf.LWFFlags.SIGNED != 0) {
|
||||
std.debug.print("(SIGNED) ", .{});
|
||||
}
|
||||
std.debug.print("\n", .{});
|
||||
std.debug.print(" Frame class: {s}\n", .{@tagName(lwf.FrameClass.standard)});
|
||||
std.debug.print(" Payload: \"{s}\"\n\n", .{message});
|
||||
|
||||
// Calculate and set checksum
|
||||
frame.updateChecksum();
|
||||
|
||||
std.debug.print("3. Checksum:\n", .{});
|
||||
std.debug.print(" Calculated: 0x{X:0>8}\n", .{std.mem.bigToNative(u32, frame.trailer.checksum)});
|
||||
std.debug.print(" Verified: {}\n\n", .{frame.verifyChecksum()});
|
||||
|
||||
// Encode frame to bytes
|
||||
const encoded = try frame.encode(allocator);
|
||||
defer allocator.free(encoded);
|
||||
|
||||
std.debug.print("4. Encoded frame:\n", .{});
|
||||
std.debug.print(" Size: {} bytes\n", .{encoded.len});
|
||||
std.debug.print(" First 16 bytes: ", .{});
|
||||
for (encoded[0..16]) |byte| {
|
||||
std.debug.print("{X:0>2} ", .{byte});
|
||||
}
|
||||
std.debug.print("\n\n", .{});
|
||||
|
||||
// Decode frame back
|
||||
var decoded = try lwf.LWFFrame.decode(allocator, encoded);
|
||||
defer decoded.deinit(allocator);
|
||||
|
||||
std.debug.print("5. Decoded frame:\n", .{});
|
||||
std.debug.print(" Magic: {s}\n", .{decoded.header.magic[0..3]});
|
||||
std.debug.print(" Version: {}\n", .{decoded.header.version});
|
||||
std.debug.print(" Service type: 0x{X:0>4}\n", .{std.mem.bigToNative(u16, decoded.header.service_type)});
|
||||
std.debug.print(" Payload: \"{s}\"\n", .{decoded.payload[0..message.len]});
|
||||
std.debug.print(" Checksum valid: {}\n\n", .{decoded.verifyChecksum()});
|
||||
|
||||
std.debug.print("✅ LWF frame encoding/decoding works!\n", .{});
|
||||
}
|
||||
|
|
@ -0,0 +1,433 @@
|
|||
//! RFC-0000: Libertaria Wire Frame Protocol
|
||||
//!
|
||||
//! This module implements the core LWF frame structure for L0 transport.
|
||||
//!
|
||||
//! Key features:
|
||||
//! - Fixed-size header (64 bytes)
|
||||
//! - Variable payload (up to 8900 bytes based on frame class)
|
||||
//! - Fixed-size trailer (36 bytes)
|
||||
//! - Checksum verification (CRC32-C)
|
||||
//! - Signature support (Ed25519)
|
||||
//!
|
||||
//! Frame structure:
|
||||
//! ┌──────────────────┐
|
||||
//! │ Header (64B) │
|
||||
//! ├──────────────────┤
|
||||
//! │ Payload (var) │
|
||||
//! ├──────────────────┤
|
||||
//! │ Trailer (36B) │
|
||||
//! └──────────────────┘
|
||||
|
||||
const std = @import("std");
|
||||
|
||||
/// RFC-0000 Section 4.1: Frame size classes
|
||||
pub const FrameClass = enum(u8) {
|
||||
micro = 0x00, // 128 bytes
|
||||
tiny = 0x01, // 512 bytes
|
||||
standard = 0x02, // 1350 bytes (default)
|
||||
large = 0x03, // 4096 bytes
|
||||
jumbo = 0x04, // 9000 bytes
|
||||
|
||||
pub fn maxPayloadSize(self: FrameClass) usize {
|
||||
return switch (self) {
|
||||
.micro => 128 - LWFHeader.SIZE - LWFTrailer.SIZE,
|
||||
.tiny => 512 - LWFHeader.SIZE - LWFTrailer.SIZE,
|
||||
.standard => 1350 - LWFHeader.SIZE - LWFTrailer.SIZE,
|
||||
.large => 4096 - LWFHeader.SIZE - LWFTrailer.SIZE,
|
||||
.jumbo => 9000 - LWFHeader.SIZE - LWFTrailer.SIZE,
|
||||
};
|
||||
}
|
||||
};
|
||||
|
||||
/// RFC-0000 Section 4.3: Frame flags
|
||||
pub const LWFFlags = struct {
|
||||
pub const ENCRYPTED: u8 = 0x01; // Payload is encrypted
|
||||
pub const SIGNED: u8 = 0x02; // Trailer has signature
|
||||
pub const RELAYABLE: u8 = 0x04; // Can be relayed by nodes
|
||||
pub const HAS_ENTROPY: u8 = 0x08; // Includes Entropy Stamp
|
||||
pub const FRAGMENTED: u8 = 0x10; // Part of fragmented message
|
||||
pub const PRIORITY: u8 = 0x20; // High-priority frame
|
||||
};
|
||||
|
||||
/// RFC-0000 Section 4.2: LWF Header (64 bytes fixed)
|
||||
pub const LWFHeader = extern struct {
|
||||
magic: [4]u8, // "LWF\0"
|
||||
version: u8, // 0x01
|
||||
flags: u8, // Bitfield (see LWFFlags)
|
||||
service_type: u16, // Big-endian, 0x0A00-0x0AFF for Feed
|
||||
source_hint: [20]u8, // Blake3 truncated DID hint
|
||||
dest_hint: [20]u8, // Blake3 truncated DID hint
|
||||
sequence: u32, // Big-endian, anti-replay counter
|
||||
timestamp: u64, // Big-endian, Unix epoch milliseconds
|
||||
payload_len: u16, // Big-endian, actual payload size
|
||||
entropy_difficulty: u8, // Entropy Stamp difficulty (0-255)
|
||||
frame_class: u8, // FrameClass enum value
|
||||
|
||||
pub const SIZE: usize = 64;
|
||||
|
||||
/// Initialize header with default values
|
||||
pub fn init() LWFHeader {
|
||||
return .{
|
||||
.magic = [_]u8{ 'L', 'W', 'F', 0 },
|
||||
.version = 0x01,
|
||||
.flags = 0,
|
||||
.service_type = 0,
|
||||
.source_hint = [_]u8{0} ** 20,
|
||||
.dest_hint = [_]u8{0} ** 20,
|
||||
.sequence = 0,
|
||||
.timestamp = 0,
|
||||
.payload_len = 0,
|
||||
.entropy_difficulty = 0,
|
||||
.frame_class = @intFromEnum(FrameClass.standard),
|
||||
};
|
||||
}
|
||||
|
||||
/// Validate header magic bytes
|
||||
pub fn isValid(self: *const LWFHeader) bool {
|
||||
const expected_magic = [4]u8{ 'L', 'W', 'F', 0 };
|
||||
return std.mem.eql(u8, &self.magic, &expected_magic) and self.version == 0x01;
|
||||
}
|
||||
|
||||
/// Serialize header to exactly 64 bytes (no padding)
|
||||
pub fn toBytes(self: *const LWFHeader, buffer: *[64]u8) void {
|
||||
var offset: usize = 0;
|
||||
|
||||
// magic: [4]u8
|
||||
@memcpy(buffer[offset..][0..4], &self.magic);
|
||||
offset += 4;
|
||||
|
||||
// version: u8
|
||||
buffer[offset] = self.version;
|
||||
offset += 1;
|
||||
|
||||
// flags: u8
|
||||
buffer[offset] = self.flags;
|
||||
offset += 1;
|
||||
|
||||
// service_type: u16 (already big-endian, copy bytes directly)
|
||||
@memcpy(buffer[offset..][0..2], std.mem.asBytes(&self.service_type));
|
||||
offset += 2;
|
||||
|
||||
// source_hint: [20]u8
|
||||
@memcpy(buffer[offset..][0..20], &self.source_hint);
|
||||
offset += 20;
|
||||
|
||||
// dest_hint: [20]u8
|
||||
@memcpy(buffer[offset..][0..20], &self.dest_hint);
|
||||
offset += 20;
|
||||
|
||||
// sequence: u32 (already big-endian, copy bytes directly)
|
||||
@memcpy(buffer[offset..][0..4], std.mem.asBytes(&self.sequence));
|
||||
offset += 4;
|
||||
|
||||
// timestamp: u64 (already big-endian, copy bytes directly)
|
||||
@memcpy(buffer[offset..][0..8], std.mem.asBytes(&self.timestamp));
|
||||
offset += 8;
|
||||
|
||||
// payload_len: u16 (already big-endian, copy bytes directly)
|
||||
@memcpy(buffer[offset..][0..2], std.mem.asBytes(&self.payload_len));
|
||||
offset += 2;
|
||||
|
||||
// entropy_difficulty: u8
|
||||
buffer[offset] = self.entropy_difficulty;
|
||||
offset += 1;
|
||||
|
||||
// frame_class: u8
|
||||
buffer[offset] = self.frame_class;
|
||||
// offset += 1; // Final field, no need to increment
|
||||
|
||||
std.debug.assert(offset + 1 == 64); // Verify we wrote exactly 64 bytes
|
||||
}
|
||||
|
||||
/// Deserialize header from exactly 64 bytes
|
||||
pub fn fromBytes(buffer: *const [64]u8) LWFHeader {
|
||||
var header: LWFHeader = undefined;
|
||||
var offset: usize = 0;
|
||||
|
||||
// magic: [4]u8
|
||||
@memcpy(&header.magic, buffer[offset..][0..4]);
|
||||
offset += 4;
|
||||
|
||||
// version: u8
|
||||
header.version = buffer[offset];
|
||||
offset += 1;
|
||||
|
||||
// flags: u8
|
||||
header.flags = buffer[offset];
|
||||
offset += 1;
|
||||
|
||||
// service_type: u16 (already big-endian, copy bytes directly)
|
||||
@memcpy(std.mem.asBytes(&header.service_type), buffer[offset..][0..2]);
|
||||
offset += 2;
|
||||
|
||||
// source_hint: [20]u8
|
||||
@memcpy(&header.source_hint, buffer[offset..][0..20]);
|
||||
offset += 20;
|
||||
|
||||
// dest_hint: [20]u8
|
||||
@memcpy(&header.dest_hint, buffer[offset..][0..20]);
|
||||
offset += 20;
|
||||
|
||||
// sequence: u32 (already big-endian, copy bytes directly)
|
||||
@memcpy(std.mem.asBytes(&header.sequence), buffer[offset..][0..4]);
|
||||
offset += 4;
|
||||
|
||||
// timestamp: u64 (already big-endian, copy bytes directly)
|
||||
@memcpy(std.mem.asBytes(&header.timestamp), buffer[offset..][0..8]);
|
||||
offset += 8;
|
||||
|
||||
// payload_len: u16 (already big-endian, copy bytes directly)
|
||||
@memcpy(std.mem.asBytes(&header.payload_len), buffer[offset..][0..2]);
|
||||
offset += 2;
|
||||
|
||||
// entropy_difficulty: u8
|
||||
header.entropy_difficulty = buffer[offset];
|
||||
offset += 1;
|
||||
|
||||
// frame_class: u8
|
||||
header.frame_class = buffer[offset];
|
||||
// offset += 1; // Final field
|
||||
|
||||
return header;
|
||||
}
|
||||
};
|
||||
|
||||
/// RFC-0000 Section 4.7: LWF Trailer (36 bytes fixed)
|
||||
pub const LWFTrailer = extern struct {
|
||||
signature: [32]u8, // Ed25519 signature (or zeros if not signed)
|
||||
checksum: u32, // CRC32-C, big-endian
|
||||
|
||||
pub const SIZE: usize = 36;
|
||||
|
||||
/// Initialize trailer with zeros
|
||||
pub fn init() LWFTrailer {
|
||||
return .{
|
||||
.signature = [_]u8{0} ** 32,
|
||||
.checksum = 0,
|
||||
};
|
||||
}
|
||||
|
||||
/// Serialize trailer to exactly 36 bytes (no padding)
|
||||
pub fn toBytes(self: *const LWFTrailer, buffer: *[36]u8) void {
|
||||
var offset: usize = 0;
|
||||
|
||||
// signature: [32]u8
|
||||
@memcpy(buffer[offset..][0..32], &self.signature);
|
||||
offset += 32;
|
||||
|
||||
// checksum: u32 (already big-endian, copy bytes directly)
|
||||
@memcpy(buffer[offset..][0..4], std.mem.asBytes(&self.checksum));
|
||||
// offset += 4;
|
||||
|
||||
std.debug.assert(offset + 4 == 36); // Verify we wrote exactly 36 bytes
|
||||
}
|
||||
|
||||
/// Deserialize trailer from exactly 36 bytes
|
||||
pub fn fromBytes(buffer: *const [36]u8) LWFTrailer {
|
||||
var trailer: LWFTrailer = undefined;
|
||||
var offset: usize = 0;
|
||||
|
||||
// signature: [32]u8
|
||||
@memcpy(&trailer.signature, buffer[offset..][0..32]);
|
||||
offset += 32;
|
||||
|
||||
// checksum: u32 (already big-endian, copy bytes directly)
|
||||
@memcpy(std.mem.asBytes(&trailer.checksum), buffer[offset..][0..4]);
|
||||
// offset += 4;
|
||||
|
||||
return trailer;
|
||||
}
|
||||
};
|
||||
|
||||
/// RFC-0000 Section 4.1: Complete LWF Frame
|
||||
pub const LWFFrame = struct {
|
||||
header: LWFHeader,
|
||||
payload: []u8,
|
||||
trailer: LWFTrailer,
|
||||
|
||||
/// Create new frame with allocated payload
|
||||
pub fn init(allocator: std.mem.Allocator, payload_size: usize) !LWFFrame {
|
||||
const payload = try allocator.alloc(u8, payload_size);
|
||||
@memset(payload, 0);
|
||||
|
||||
return .{
|
||||
.header = LWFHeader.init(),
|
||||
.payload = payload,
|
||||
.trailer = LWFTrailer.init(),
|
||||
};
|
||||
}
|
||||
|
||||
/// Free payload memory
|
||||
pub fn deinit(self: *LWFFrame, allocator: std.mem.Allocator) void {
|
||||
allocator.free(self.payload);
|
||||
}
|
||||
|
||||
/// Total frame size (header + payload + trailer)
|
||||
pub fn size(self: *const LWFFrame) usize {
|
||||
return LWFHeader.SIZE + self.payload.len + LWFTrailer.SIZE;
|
||||
}
|
||||
|
||||
/// Encode frame to bytes (allocates new buffer)
|
||||
pub fn encode(self: *const LWFFrame, allocator: std.mem.Allocator) ![]u8 {
|
||||
const total_size = self.size();
|
||||
var buffer = try allocator.alloc(u8, total_size);
|
||||
|
||||
// Serialize header (exactly 64 bytes)
|
||||
var header_bytes: [64]u8 = undefined;
|
||||
self.header.toBytes(&header_bytes);
|
||||
@memcpy(buffer[0..64], &header_bytes);
|
||||
|
||||
// Copy payload
|
||||
@memcpy(buffer[64 .. 64 + self.payload.len], self.payload);
|
||||
|
||||
// Serialize trailer (exactly 36 bytes)
|
||||
var trailer_bytes: [36]u8 = undefined;
|
||||
self.trailer.toBytes(&trailer_bytes);
|
||||
const trailer_start = 64 + self.payload.len;
|
||||
@memcpy(buffer[trailer_start .. trailer_start + 36], &trailer_bytes);
|
||||
|
||||
return buffer;
|
||||
}
|
||||
|
||||
/// Decode frame from bytes (allocates payload)
|
||||
pub fn decode(allocator: std.mem.Allocator, data: []const u8) !LWFFrame {
|
||||
// Minimum frame size check
|
||||
if (data.len < 64 + 36) {
|
||||
return error.FrameTooSmall;
|
||||
}
|
||||
|
||||
// Parse header (first 64 bytes)
|
||||
var header_bytes: [64]u8 = undefined;
|
||||
@memcpy(&header_bytes, data[0..64]);
|
||||
const header = LWFHeader.fromBytes(&header_bytes);
|
||||
|
||||
// Validate header
|
||||
if (!header.isValid()) {
|
||||
return error.InvalidHeader;
|
||||
}
|
||||
|
||||
// Extract payload length
|
||||
const payload_len = @as(usize, @intCast(std.mem.bigToNative(u16, header.payload_len)));
|
||||
|
||||
// Verify frame size matches
|
||||
if (data.len < 64 + payload_len + 36) {
|
||||
return error.InvalidPayloadLength;
|
||||
}
|
||||
|
||||
// Allocate and copy payload
|
||||
const payload = try allocator.alloc(u8, payload_len);
|
||||
@memcpy(payload, data[64 .. 64 + payload_len]);
|
||||
|
||||
// Parse trailer
|
||||
const trailer_start = 64 + payload_len;
|
||||
var trailer_bytes: [36]u8 = undefined;
|
||||
@memcpy(&trailer_bytes, data[trailer_start .. trailer_start + 36]);
|
||||
const trailer = LWFTrailer.fromBytes(&trailer_bytes);
|
||||
|
||||
return .{
|
||||
.header = header,
|
||||
.payload = payload,
|
||||
.trailer = trailer,
|
||||
};
|
||||
}
|
||||
|
||||
/// Calculate CRC32-C checksum of header + payload
|
||||
pub fn calculateChecksum(self: *const LWFFrame) u32 {
|
||||
var hasher = std.hash.Crc32.init();
|
||||
|
||||
// Hash header (exactly 64 bytes)
|
||||
var header_bytes: [64]u8 = undefined;
|
||||
self.header.toBytes(&header_bytes);
|
||||
hasher.update(&header_bytes);
|
||||
|
||||
// Hash payload
|
||||
hasher.update(self.payload);
|
||||
|
||||
return hasher.final();
|
||||
}
|
||||
|
||||
/// Verify checksum matches
|
||||
pub fn verifyChecksum(self: *const LWFFrame) bool {
|
||||
const computed = self.calculateChecksum();
|
||||
const stored = std.mem.bigToNative(u32, self.trailer.checksum);
|
||||
return computed == stored;
|
||||
}
|
||||
|
||||
/// Update checksum field in trailer
|
||||
pub fn updateChecksum(self: *LWFFrame) void {
|
||||
const checksum = self.calculateChecksum();
|
||||
self.trailer.checksum = std.mem.nativeToBig(u32, checksum);
|
||||
}
|
||||
};
|
||||
|
||||
// ============================================================================
|
||||
// Tests
|
||||
// ============================================================================
|
||||
|
||||
test "LWFFrame creation" {
|
||||
const allocator = std.testing.allocator;
|
||||
|
||||
var frame = try LWFFrame.init(allocator, 100);
|
||||
defer frame.deinit(allocator);
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 64 + 100 + 36), frame.size());
|
||||
try std.testing.expectEqual(@as(u8, 'L'), frame.header.magic[0]);
|
||||
try std.testing.expectEqual(@as(u8, 0x01), frame.header.version);
|
||||
}
|
||||
|
||||
test "LWFFrame encode/decode roundtrip" {
|
||||
const allocator = std.testing.allocator;
|
||||
|
||||
// Create frame
|
||||
var frame = try LWFFrame.init(allocator, 10);
|
||||
defer frame.deinit(allocator);
|
||||
|
||||
// Populate frame
|
||||
frame.header.service_type = std.mem.nativeToBig(u16, 0x0A00); // FEED_WORLD_POST
|
||||
frame.header.payload_len = std.mem.nativeToBig(u16, 10);
|
||||
frame.header.timestamp = std.mem.nativeToBig(u64, 1234567890);
|
||||
@memcpy(frame.payload, "HelloWorld");
|
||||
frame.updateChecksum();
|
||||
|
||||
// Encode
|
||||
const encoded = try frame.encode(allocator);
|
||||
defer allocator.free(encoded);
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 64 + 10 + 36), encoded.len);
|
||||
|
||||
// Decode
|
||||
var decoded = try LWFFrame.decode(allocator, encoded);
|
||||
defer decoded.deinit(allocator);
|
||||
|
||||
// Verify
|
||||
try std.testing.expectEqualSlices(u8, "HelloWorld", decoded.payload);
|
||||
try std.testing.expectEqual(frame.header.service_type, decoded.header.service_type);
|
||||
try std.testing.expectEqual(frame.header.timestamp, decoded.header.timestamp);
|
||||
}
|
||||
|
||||
test "LWFFrame checksum verification" {
|
||||
const allocator = std.testing.allocator;
|
||||
|
||||
var frame = try LWFFrame.init(allocator, 20);
|
||||
defer frame.deinit(allocator);
|
||||
|
||||
@memcpy(frame.payload, "Test payload content");
|
||||
frame.updateChecksum();
|
||||
|
||||
// Should pass
|
||||
try std.testing.expect(frame.verifyChecksum());
|
||||
|
||||
// Corrupt payload
|
||||
frame.payload[0] = 'X';
|
||||
|
||||
// Should fail
|
||||
try std.testing.expect(!frame.verifyChecksum());
|
||||
}
|
||||
|
||||
test "FrameClass payload sizes" {
|
||||
try std.testing.expectEqual(@as(usize, 28), FrameClass.micro.maxPayloadSize());
|
||||
try std.testing.expectEqual(@as(usize, 412), FrameClass.tiny.maxPayloadSize());
|
||||
try std.testing.expectEqual(@as(usize, 1250), FrameClass.standard.maxPayloadSize());
|
||||
try std.testing.expectEqual(@as(usize, 3996), FrameClass.large.maxPayloadSize());
|
||||
try std.testing.expectEqual(@as(usize, 8900), FrameClass.jumbo.maxPayloadSize());
|
||||
}
|
||||
|
|
@ -0,0 +1,305 @@
|
|||
//! RFC-0830 Section 2.4: Encryption Primitives
|
||||
//!
|
||||
//! This module implements the cryptographic primitives for Libertaria:
|
||||
//! - X25519: Elliptic Curve Diffie-Hellman key agreement
|
||||
//! - XChaCha20-Poly1305: Authenticated encryption with associated data (AEAD)
|
||||
//! - Ed25519: Digital signatures (via soulkey.zig)
|
||||
//!
|
||||
//! All encryption in Libertaria uses XChaCha20-Poly1305 for AEAD.
|
||||
//! Key agreement uses X25519 (classical) or PQXDH (post-quantum, future).
|
||||
|
||||
const std = @import("std");
|
||||
const crypto = std.crypto;
|
||||
|
||||
/// RFC-0830 Section 2.6: WORLD_PUBLIC_KEY
|
||||
/// This is the well-known public key used for World Feed encryption.
|
||||
/// Everyone can decrypt World posts, but ISPs see only ciphertext.
|
||||
pub const WORLD_PUBLIC_KEY: [32]u8 = [_]u8{
|
||||
0x4c, 0x69, 0x62, 0x65, 0x72, 0x74, 0x61, 0x72, // "Libertar"
|
||||
0x69, 0x61, 0x20, 0x57, 0x6f, 0x72, 0x6c, 0x64, // "ia World"
|
||||
0x20, 0x46, 0x65, 0x65, 0x64, 0x20, 0x47, 0x65, // " Feed Ge"
|
||||
0x6e, 0x65, 0x73, 0x69, 0x73, 0x20, 0x4b, 0x65, // "nesis Ke"
|
||||
};
|
||||
|
||||
/// Encrypted payload structure
|
||||
pub const EncryptedPayload = struct {
|
||||
ephemeral_pubkey: [32]u8, // Sender's ephemeral public key
|
||||
nonce: [24]u8, // XChaCha20 nonce (never reused)
|
||||
ciphertext: []u8, // Encrypted data + 16-byte auth tag
|
||||
|
||||
/// Free ciphertext memory
|
||||
pub fn deinit(self: *EncryptedPayload, allocator: std.mem.Allocator) void {
|
||||
allocator.free(self.ciphertext);
|
||||
}
|
||||
|
||||
/// Total size when serialized
|
||||
pub fn size(self: *const EncryptedPayload) usize {
|
||||
return 32 + 24 + self.ciphertext.len;
|
||||
}
|
||||
|
||||
/// Serialize to bytes
|
||||
pub fn toBytes(self: *const EncryptedPayload, allocator: std.mem.Allocator) ![]u8 {
|
||||
const total_size = self.size();
|
||||
var buffer = try allocator.alloc(u8, total_size);
|
||||
|
||||
@memcpy(buffer[0..32], &self.ephemeral_pubkey);
|
||||
@memcpy(buffer[32..56], &self.nonce);
|
||||
@memcpy(buffer[56..], self.ciphertext);
|
||||
|
||||
return buffer;
|
||||
}
|
||||
|
||||
/// Deserialize from bytes
|
||||
pub fn fromBytes(allocator: std.mem.Allocator, data: []const u8) !EncryptedPayload {
|
||||
if (data.len < 56) {
|
||||
return error.PayloadTooSmall;
|
||||
}
|
||||
|
||||
const ephemeral_pubkey = data[0..32].*;
|
||||
const nonce = data[32..56].*;
|
||||
const ciphertext = try allocator.alloc(u8, data.len - 56);
|
||||
@memcpy(ciphertext, data[56..]);
|
||||
|
||||
return EncryptedPayload{
|
||||
.ephemeral_pubkey = ephemeral_pubkey,
|
||||
.nonce = nonce,
|
||||
.ciphertext = ciphertext,
|
||||
};
|
||||
}
|
||||
};
|
||||
|
||||
/// Generate a random 24-byte nonce for XChaCha20
|
||||
pub fn generateNonce() [24]u8 {
|
||||
var nonce: [24]u8 = undefined;
|
||||
crypto.random.bytes(&nonce);
|
||||
return nonce;
|
||||
}
|
||||
|
||||
/// Encrypt payload using X25519-XChaCha20-Poly1305
|
||||
///
|
||||
/// This is the standard encryption for all Libertaria tiers except MESSAGE
|
||||
/// (MESSAGE uses PQXDH → Double Ratchet via LatticePost).
|
||||
///
|
||||
/// Steps:
|
||||
/// 1. Generate ephemeral keypair for sender
|
||||
/// 2. Perform X25519 key agreement with recipient's public key
|
||||
/// 3. Encrypt plaintext with XChaCha20-Poly1305 using shared secret
|
||||
/// 4. Return ephemeral pubkey + nonce + ciphertext
|
||||
pub fn encryptPayload(
|
||||
plaintext: []const u8,
|
||||
recipient_pubkey: [32]u8,
|
||||
sender_private: [32]u8,
|
||||
allocator: std.mem.Allocator,
|
||||
) !EncryptedPayload {
|
||||
// X25519 key agreement
|
||||
const shared_secret = try crypto.dh.X25519.scalarmult(sender_private, recipient_pubkey);
|
||||
|
||||
// Derive ephemeral public key from sender's private key
|
||||
const ephemeral_pubkey = try crypto.dh.X25519.recoverPublicKey(sender_private);
|
||||
|
||||
// Generate random nonce
|
||||
const nonce = generateNonce();
|
||||
|
||||
// Allocate ciphertext buffer (plaintext + 16-byte auth tag)
|
||||
const ciphertext = try allocator.alloc(u8, plaintext.len + 16);
|
||||
|
||||
// XChaCha20-Poly1305 AEAD encryption
|
||||
crypto.aead.chacha_poly.XChaCha20Poly1305.encrypt(
|
||||
ciphertext[0..plaintext.len],
|
||||
ciphertext[plaintext.len..][0..16],
|
||||
plaintext,
|
||||
&[_]u8{}, // No additional authenticated data
|
||||
nonce,
|
||||
shared_secret,
|
||||
);
|
||||
|
||||
return EncryptedPayload{
|
||||
.ephemeral_pubkey = ephemeral_pubkey,
|
||||
.nonce = nonce,
|
||||
.ciphertext = ciphertext,
|
||||
};
|
||||
}
|
||||
|
||||
/// Decrypt payload using X25519-XChaCha20-Poly1305
|
||||
///
|
||||
/// Steps:
|
||||
/// 1. Perform X25519 key agreement using recipient's private key and sender's ephemeral pubkey
|
||||
/// 2. Decrypt ciphertext with XChaCha20-Poly1305 using shared secret
|
||||
/// 3. Verify authentication tag
|
||||
/// 4. Return plaintext
|
||||
pub fn decryptPayload(
|
||||
encrypted: *const EncryptedPayload,
|
||||
recipient_private: [32]u8,
|
||||
allocator: std.mem.Allocator,
|
||||
) ![]u8 {
|
||||
// X25519 key agreement
|
||||
const shared_secret = try crypto.dh.X25519.scalarmult(recipient_private, encrypted.ephemeral_pubkey);
|
||||
|
||||
// Calculate plaintext length (ciphertext - 16-byte auth tag)
|
||||
const plaintext_len = encrypted.ciphertext.len - 16;
|
||||
const plaintext = try allocator.alloc(u8, plaintext_len);
|
||||
|
||||
// XChaCha20-Poly1305 AEAD decryption
|
||||
try crypto.aead.chacha_poly.XChaCha20Poly1305.decrypt(
|
||||
plaintext,
|
||||
encrypted.ciphertext[0..plaintext_len],
|
||||
encrypted.ciphertext[plaintext_len..][0..16].*, // Auth tag
|
||||
&[_]u8{}, // No additional authenticated data
|
||||
encrypted.nonce,
|
||||
shared_secret,
|
||||
);
|
||||
|
||||
return plaintext;
|
||||
}
|
||||
|
||||
/// Convenience: Encrypt to WORLD tier (uses WORLD_PUBLIC_KEY as shared secret)
|
||||
/// Special case: WORLD_PUBLIC_KEY is used directly as the encryption key
|
||||
/// This allows anyone who knows WORLD_PUBLIC_KEY to decrypt (obfuscation, not true security)
|
||||
pub fn encryptWorld(
|
||||
plaintext: []const u8,
|
||||
sender_private: [32]u8,
|
||||
allocator: std.mem.Allocator,
|
||||
) !EncryptedPayload {
|
||||
_ = sender_private; // Not used for World encryption
|
||||
|
||||
// Use WORLD_PUBLIC_KEY directly as shared secret (symmetric-like encryption)
|
||||
const shared_secret = WORLD_PUBLIC_KEY;
|
||||
|
||||
// Generate random nonce
|
||||
const nonce = generateNonce();
|
||||
|
||||
// Allocate ciphertext buffer (plaintext + 16-byte auth tag)
|
||||
const ciphertext = try allocator.alloc(u8, plaintext.len + 16);
|
||||
|
||||
// XChaCha20-Poly1305 AEAD encryption
|
||||
crypto.aead.chacha_poly.XChaCha20Poly1305.encrypt(
|
||||
ciphertext[0..plaintext.len],
|
||||
ciphertext[plaintext.len..][0..16],
|
||||
plaintext,
|
||||
&[_]u8{}, // No additional authenticated data
|
||||
nonce,
|
||||
shared_secret,
|
||||
);
|
||||
|
||||
// For WORLD encryption, ephemeral_pubkey is WORLD_PUBLIC_KEY itself
|
||||
// This signals that it's world-readable (no ECDH needed)
|
||||
return EncryptedPayload{
|
||||
.ephemeral_pubkey = WORLD_PUBLIC_KEY,
|
||||
.nonce = nonce,
|
||||
.ciphertext = ciphertext,
|
||||
};
|
||||
}
|
||||
|
||||
/// Convenience: Decrypt from WORLD tier (uses WORLD_PUBLIC_KEY as shared secret)
|
||||
/// Special case: Uses WORLD_PUBLIC_KEY directly as decryption key
|
||||
pub fn decryptWorld(
|
||||
encrypted: *const EncryptedPayload,
|
||||
recipient_private: [32]u8,
|
||||
allocator: std.mem.Allocator,
|
||||
) ![]u8 {
|
||||
_ = recipient_private; // Not used for World decryption
|
||||
|
||||
// Use WORLD_PUBLIC_KEY directly as shared secret
|
||||
const shared_secret = WORLD_PUBLIC_KEY;
|
||||
|
||||
// Calculate plaintext length (ciphertext - 16-byte auth tag)
|
||||
const plaintext_len = encrypted.ciphertext.len - 16;
|
||||
const plaintext = try allocator.alloc(u8, plaintext_len);
|
||||
|
||||
// XChaCha20-Poly1305 AEAD decryption
|
||||
try crypto.aead.chacha_poly.XChaCha20Poly1305.decrypt(
|
||||
plaintext,
|
||||
encrypted.ciphertext[0..plaintext_len],
|
||||
encrypted.ciphertext[plaintext_len..][0..16].*, // Auth tag
|
||||
&[_]u8{}, // No additional authenticated data
|
||||
encrypted.nonce,
|
||||
shared_secret,
|
||||
);
|
||||
|
||||
return plaintext;
|
||||
}
|
||||
|
||||
// ============================================================================
|
||||
// Tests
|
||||
// ============================================================================
|
||||
|
||||
test "encryptPayload/decryptPayload roundtrip" {
|
||||
const allocator = std.testing.allocator;
|
||||
|
||||
// Generate keypairs
|
||||
var sender_private: [32]u8 = undefined;
|
||||
var recipient_private: [32]u8 = undefined;
|
||||
crypto.random.bytes(&sender_private);
|
||||
crypto.random.bytes(&recipient_private);
|
||||
|
||||
const recipient_public = try crypto.dh.X25519.recoverPublicKey(recipient_private);
|
||||
|
||||
// Encrypt
|
||||
const plaintext = "Hello, Libertaria!";
|
||||
var encrypted = try encryptPayload(plaintext, recipient_public, sender_private, allocator);
|
||||
defer encrypted.deinit(allocator);
|
||||
|
||||
try std.testing.expect(encrypted.ciphertext.len > plaintext.len); // Has auth tag
|
||||
|
||||
// Decrypt
|
||||
const decrypted = try decryptPayload(&encrypted, recipient_private, allocator);
|
||||
defer allocator.free(decrypted);
|
||||
|
||||
// Verify
|
||||
try std.testing.expectEqualStrings(plaintext, decrypted);
|
||||
}
|
||||
|
||||
test "encryptWorld/decryptWorld roundtrip" {
|
||||
const allocator = std.testing.allocator;
|
||||
|
||||
// Generate keypair
|
||||
var private_key: [32]u8 = undefined;
|
||||
crypto.random.bytes(&private_key);
|
||||
|
||||
// Encrypt to World
|
||||
const plaintext = "Hello, World Feed!";
|
||||
var encrypted = try encryptWorld(plaintext, private_key, allocator);
|
||||
defer encrypted.deinit(allocator);
|
||||
|
||||
// Decrypt from World
|
||||
const decrypted = try decryptWorld(&encrypted, private_key, allocator);
|
||||
defer allocator.free(decrypted);
|
||||
|
||||
// Verify
|
||||
try std.testing.expectEqualStrings(plaintext, decrypted);
|
||||
}
|
||||
|
||||
test "EncryptedPayload serialization" {
|
||||
const allocator = std.testing.allocator;
|
||||
|
||||
// Create encrypted payload
|
||||
var encrypted = EncryptedPayload{
|
||||
.ephemeral_pubkey = [_]u8{0xAA} ** 32,
|
||||
.nonce = [_]u8{0xBB} ** 24,
|
||||
.ciphertext = try allocator.alloc(u8, 48), // 32 bytes + 16 auth tag
|
||||
};
|
||||
defer encrypted.deinit(allocator);
|
||||
@memset(encrypted.ciphertext, 0xCC);
|
||||
|
||||
// Serialize
|
||||
const bytes = try encrypted.toBytes(allocator);
|
||||
defer allocator.free(bytes);
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 32 + 24 + 48), bytes.len);
|
||||
|
||||
// Deserialize
|
||||
var deserialized = try EncryptedPayload.fromBytes(allocator, bytes);
|
||||
defer deserialized.deinit(allocator);
|
||||
|
||||
try std.testing.expectEqualSlices(u8, &encrypted.ephemeral_pubkey, &deserialized.ephemeral_pubkey);
|
||||
try std.testing.expectEqualSlices(u8, &encrypted.nonce, &deserialized.nonce);
|
||||
try std.testing.expectEqualSlices(u8, encrypted.ciphertext, deserialized.ciphertext);
|
||||
}
|
||||
|
||||
test "nonce generation is random" {
|
||||
const nonce1 = generateNonce();
|
||||
const nonce2 = generateNonce();
|
||||
|
||||
// Extremely unlikely to be equal if truly random
|
||||
try std.testing.expect(!std.mem.eql(u8, &nonce1, &nonce2));
|
||||
}
|
||||
Loading…
Reference in New Issue