From 21eb15e87b42728d6fd3de6cbc256dde62fbacfd Mon Sep 17 00:00:00 2001
From: Michaël Ball <michael.ball@gmail.com>
Date: Sun, 4 Sep 2016 19:14:15 +0100
Subject: Add source

---
 passphrasegen.go | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 passphrasegen.go

(limited to 'passphrasegen.go')

diff --git a/passphrasegen.go b/passphrasegen.go
new file mode 100644
index 0000000..32d708e
--- /dev/null
+++ b/passphrasegen.go
@@ -0,0 +1,61 @@
+package main
+
+import (
+	"bufio"
+	"flag"
+	"fmt"
+	"math/rand"
+	"os"
+	"strings"
+	"time"
+)
+
+var numWords = flag.Int("w", 4, "Number of words in passphrase")
+
+func readLines(path string) ([]string, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	var lines []string
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
+	}
+	return lines, scanner.Err()
+}
+
+func init() {
+	rand.Seed(time.Now().UTC().UnixNano())
+}
+
+func main() {
+	flag.Parse()
+
+	args := flag.Args()
+
+	wordsFile := "/usr/share/dict/words"
+
+	if len(args) > 0 {
+		wordsFile = args[0]
+	}
+
+	words, err := readLines(wordsFile)
+
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	phraseWords := make([]string, *numWords)
+
+	for index := 0; index < *numWords; index++ {
+		randInt := rand.Intn((len(words) - 1))
+
+		phraseWords[index] = words[randInt]
+	}
+
+	fmt.Println(strings.Join(phraseWords, " "))
+}
-- 
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