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rw_test.go
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rw_test.go
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package secio
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"io"
"testing"
)
type keyInfo struct {
cipherKey []byte
iv []byte
macKey []byte
}
func getTestKeyInfo() *keyInfo {
return &keyInfo{
cipherKey: []byte("this is a test keyaaaaaaaaaaaaaa"),
iv: make([]byte, 16),
macKey: []byte("key for the mac"),
}
}
func getTestingWriter(w io.Writer, ki *keyInfo) (*etmWriter, error) {
c, err := aes.NewCipher(ki.cipherKey)
if err != nil {
return nil, err
}
stream := cipher.NewCFBEncrypter(c, ki.iv)
mac, err := newMac("SHA256", ki.macKey)
if err != nil {
return nil, err
}
return NewETMWriter(w, stream, mac).(*etmWriter), nil
}
func getTestingReader(r io.Reader, ki *keyInfo) (*etmReader, error) {
c, err := aes.NewCipher(ki.cipherKey)
if err != nil {
return nil, err
}
stream := cipher.NewCFBDecrypter(c, ki.iv)
mac, err := newMac("SHA256", ki.macKey)
if err != nil {
return nil, err
}
return NewETMReader(r, stream, mac).(*etmReader), nil
}
func TestBasicETMStream(t *testing.T) {
buf := new(bytes.Buffer)
ki := getTestKeyInfo()
w, err := getTestingWriter(buf, ki)
if err != nil {
t.Fatal(err)
}
before := []byte("hello world")
err = w.WriteMsg(before)
if err != nil {
t.Fatal(err)
}
r, err := getTestingReader(buf, ki)
if err != nil {
t.Fatal(err)
}
msg, err := r.ReadMsg()
if err != nil {
t.Fatal(err)
}
if string(before) != string(msg) {
t.Fatal("got wrong message")
}
w.Close()
r.Close()
}
func TestBasicETMStreamRaw(t *testing.T) {
buf := new(bytes.Buffer)
ki := getTestKeyInfo()
w, err := getTestingWriter(buf, ki)
if err != nil {
t.Fatal(err)
}
before := []byte("hello world")
wlen, err := w.Write(before)
if err != nil {
t.Fatal(err)
}
if wlen != len(before) {
t.Errorf("Write length mismatch. %d != %d", wlen, len(before))
}
r, err := getTestingReader(buf, ki)
if err != nil {
t.Fatal(err)
}
after := make([]byte, wlen)
rlen, err := r.Read(after)
if err != nil {
t.Fatal(err)
}
if rlen != wlen {
t.Errorf("Read length mismatch. %d != %d", rlen, wlen)
}
if string(before) != string(after) {
t.Fatal("got wrong message")
}
w.Close()
r.Close()
}