Brute forcer in go. Tries given dictionary first.

brute.go

package main

import (
	"bufio"
	"fmt"
	"os"
	"time"
)

func main() {
	pc := make(chan string, 2)

	go func() {
		f, err := os.Open("pass.txt")
		defer f.Close()
		if err != nil {
			panic(err)
		}

		s := bufio.NewScanner(f)
		for s.Scan() {
			pc <- s.Text()
		}
		if err := s.Err(); err != nil {
			panic(err)
		}

		n := byte(33)
		x := byte(126)
		b := []byte{n}
		PushChar(b, 1, pc, n, x)
	}()

	for {
		fmt.Println(<-pc)
	}
}

func PushChar(b []byte, l int, pc chan<- string, n byte, x byte) {
	pc <- string(b)
	b[len(b)-l]++
	if b[len(b)-l] > x {
		b[len(b)-l] = n
		l++
		if len(b) < l {
			b = append(b, n)
			l = 1
		}
	} else {
		l = 1
	}
	PushChar(b, l, pc, n, x)
}