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package main
import (
"crypto/hmac"
"crypto/sha256"
"encoding/base64"
"flag"
"fmt"
"math/rand"
"os"
"time"
)
var r *rand.Rand
func main() {
accessKeySwitch := flag.Bool("a", false, "Gen a fake AWS style access key")
secretKeySwitch := flag.Bool("s", false, "Gen a fake AWS style secret key")
flag.Parse()
r = rand.New(rand.NewSource(time.Now().UnixNano()))
accessKey := randomAccessKey(20)
formattedAccessKey := mergePrefixWithKey("AKIA", accessKey)
secretKey := computeHmac256(string(time.Now().String()), accessKey)
if *accessKeySwitch == true {
fmt.Printf("%v", formattedAccessKey)
os.Exit(0)
}
if *secretKeySwitch == true {
fmt.Printf("%v", secretKey)
os.Exit(0)
}
printEverything(formattedAccessKey, secretKey)
}
func printEverything(accessKey string, secretKey string) {
fmt.Printf("ACCESS KEY: %s\n", accessKey)
fmt.Printf("SECRET KEY: %s\n", secretKey)
}
func randomAccessKey(length int) string {
const chars string = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
buffer := make([]byte, length)
for i := range buffer {
buffer[i] = chars[r.Intn(len(chars))]
}
return string(buffer)
}
func mergePrefixWithKey(prefix string, key string) string {
// can't do this, prefix should be less than the key
if len(prefix) > len(key) {
return key
}
built := []rune(key)
for index, rune := range prefix {
built[index] = rune
}
return string(built)
}
func computeHmac256(message string, secret string) string {
key := []byte(secret)
h := hmac.New(sha256.New, key)
h.Write([]byte(message))
return base64.StdEncoding.EncodeToString(h.Sum(nil))
}
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