initial

app.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/x509"
+	"encoding/base32"
+	"encoding/pem"
+	"fmt"
+	"io"
+	"os"
+	"time"
+)
+
+var enc = base32.NewEncoding("abcdefghijklmnopqrstuvwxyz234567")
+
+func main() {
+	pkey, err := rsa.GenerateKey(rand.Reader, 4096)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	fmt.Println(pkey.D)
+	fmt.Printf("%v\n", pkey.D.Bytes())
+
+	// get the DER encoded key
+	data := x509.MarshalPKCS1PrivateKey(pkey)
+	fmt.Printf("%v\n", data)
+	b := pem.Block{
+		Bytes: data,
+		Type:  "RSA PRIVATE KEY",
+		Headers: map[string]string{
+			"date": time.Now().String(),
+		},
+	}
+	data = pem.EncodeToMemory(&b)
+	fmt.Printf("%s\n", data)
+
+	h := sha1.New()
+	io.WriteString(h, "His money is twice tainted:")
+	sum := h.Sum(nil)
+
+	println(enc.EncodeToString(sum)[0:15])
+}