PEM data encoding for C3

Handle PEM file format in C3. Most common uses for PEM encoding is for TLS keys. Compliant with RFC 1421.

API overview:

import encoding::pem;

// Decode a PEM block from a String:
fn PemBlock! decode(String s, Allocator allocator);
fn PemBlock! decode_new(String s);
fn PemBlock! decode_temp(String s);

// PemBlock
struct PemBlock
{
	Allocator allocator;
	String type;
	Header header;
	char[] bytes;
}

Example

module app;

import encoding::pem;
import std::io;

const PEM = `
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`;

fn void! main()
{
	PemBlock block = pem::decode_new(PEM)!;
	defer block.free();
	io::printn(block);
}

Installation

Clone the repository with git clone http://github.com/konimarti/pem.c3l to the ./lib folder of your C3 project and add the following to project.json:

{
    "dependency-search-paths": [ "lib" ],
    "dependencies": [ "pem" ]
}

If you didn't clone it into the lib folder, adjust your dependency-search-paths accordingly.