Decrease default hardness parameters for most cases

[balloon.git] / cmd / balloon / main.go

diff --git a/cmd/balloon/main.go b/cmd/balloon/main.go
index 65d27a11e8d9f59e554f885b15d64e62250c88ba..9c541a42a232edcc64b764e4652b2f8b2ebbf6bf 100644 (file)
--- a/cmd/balloon/main.go
+++ b/cmd/balloon/main.go
@@ -21,20 +21,26 @@ package main
 import (
        "crypto/rand"
        "crypto/sha512"
+       "encoding/base64"
        "encoding/hex"
        "flag"
        "fmt"
        "io"
+       "os"
 
        "go.cypherpunks.ru/balloon"
 )
 
 func main() {
-       s := flag.Int("s", 1<<18, "Space cost, number of hash-sized blocks")
-       t := flag.Int("t", 2, "Time cost, rounds")
-       p := flag.Int("p", 4, "Number of threads")
+       s := flag.Int("s", 1<<16, "Space cost, number of hash-sized blocks")
+       t := flag.Int("t", 3, "Time cost, rounds")
+       p := flag.Int("p", 1, "Number of threads")
        saltHex := flag.String("salt", "", "Salt, hexadecimal, optional")
        passwd := flag.String("passwd", "", "Password")
+       flag.Usage = func() {
+               fmt.Fprintf(os.Stderr, "balloon -- Strengthen password with Balloon+SHA512\n\n")
+               flag.PrintDefaults()
+       }
        flag.Parse()
        var salt []byte
        var err error
@@ -47,5 +53,13 @@ func main() {
        if err != nil {
                panic(err)
        }
-       fmt.Println(hex.EncodeToString(balloon.H(sha512.New, []byte(*passwd), salt, *s, *t, *p)))
+       fmt.Println("Salt:", hex.EncodeToString(salt))
+       h := balloon.H(sha512.New, []byte(*passwd), salt, *s, *t, *p)
+       fmt.Println("Hash:", hex.EncodeToString(h))
+       fmt.Printf(
+               "Encoded: $balloon$h=sha512,s=%d,t=%d,p=%d$%s$%s\n",
+               *s, *t, *p,
+               base64.RawStdEncoding.EncodeToString(salt),
+               base64.RawStdEncoding.EncodeToString(h),
+       )
 }