demurky

Creating Self-Signed ED25519 CA and Certificates

IMPORTANT: the Common Name (CN) of the servers should be different from that of the CA. Otherwise, things won't work on servers that use OpenSSL.

CA

openssl genpkey -algorithm ed25519 > ca-key.pem

demurky

// Package aria2ctrlfile implements [aria2]'s [control file format] (version 1).
// See https://github.com/aria2/aria2/blob/release-1.37.0/src/DefaultBtProgressInfoFile.cc
// for implementation details.
//
// [aria2]: https://github.com/aria2/aria2
// [control file format]: https://aria2.github.io/manual/en/html/technical-notes.html#control-file-aria2-format
package aria2ctrlfile

import (
	"encoding/binary"

demurky

import "math/bits"

func mulDiv(a, b, c int64) int64 {
	hi, lo := bits.Mul64(uint64(a), uint64(b))
	quo, _ := bits.Div64(hi, lo, uint64(c))
	return int64(quo)
}

demurky

package ringbuf

type RingBuf[T any] struct {
	Buf  []T
	head int
	tail int
}

func New[T any](size int) *RingBuf[T] {
	return &RingBuf[T]{

demurky

#!/bin/bash
set -eu -o pipefail

# Script that returns a list of DNS-over-HTTPS servers that are accessible directly via IP address.
# https://dnscrypt.info/public-servers
# https://dnscrypt.info/stamps-specifications

main()
{
	VERBOSE=false

demurky

func subsets[T any](v []T) [][]T {
	switch len(v) {
	case 0:
		return [][]T{
			{},
		}
	case 1:
		return [][]T{
			{v[0]},
			{},

demurky

func permute[T any](v []T) [][]T {
	switch len(v) {
	case 0:
		return [][]T{
			{},
		}
	case 1:
		return [][]T{
			{v[0]},
		}

demurky

import "sync"

type Nuclear[T any] struct {
	mu sync.RWMutex
	v  T
}

func NewNuclear[T any](v T) *Nuclear[T] {
	return &Nuclear{
		v: v,

demurky

package once

import "sync"

type Once[T any] struct {
	sync.Mutex
	has bool
	v   T
}

demurky

package withcloser

import "io"

type reader struct {
	io.Reader
	close func() error
}

func (r reader) Close() error {