func Decrypt(text, key []byte) ([]byte, error) {
// Create cipher and pad text
cipher, padded, err := cipherAndPaddedText(text, key)
if err != nil {
return nil, err
}
keysize := len(key)
// Decrypt each block
for i := 0; i < len(padded); i += keysize {
cipher.Decrypt(padded[i:i+keysize], padded[i:i+keysize])
}
return padded[:len(text)], nil
}
// Authenticate and start a session
func (m *Mega) Login(email string, passwd string) error {
var msg [1]LoginMsg
var res [1]LoginResp
var err error
var result []byte
passkey := password_key(passwd)
uhandle := stringhash(email, passkey)
m.uh = make([]byte, len(uhandle))
copy(m.uh, uhandle)
msg[0].Cmd = "us"
msg[0].User = email
msg[0].Handle = string(uhandle)
req, _ := json.Marshal(msg)
result, err = m.api_request(req)
if err != nil {
return err
}
err = json.Unmarshal(result, &res)
if err != nil {
return err
}
m.k = base64urldecode([]byte(res[0].Key))
cipher, err := aes.NewCipher(passkey)
cipher.Decrypt(m.k, m.k)
m.sid = decryptSessionId([]byte(res[0].Privk), []byte(res[0].Csid), m.k)
if err != nil {
return err
}
err = m.getFileSystem()
return err
}