public static SharedWrapper with(@NonNull Context context, @NonNull String name) {
if (secretSingleton == null || ivSingleton == null) {
synchronized (SharedWrapper.class) {
if (secretSingleton == null) {
secretSingleton =
Crypt.AES.generateSecret(Digest.SHA256.getRaw(DeviceInfo.getDeviceToken(context)));
}
if (ivSingleton == null) {
ivSingleton = Crypt.AES.generateIV(Digest.MD5.getRaw(DeviceInfo.getDeviceToken(context)));
}
}
}
return new SharedWrapper(context, name, secretSingleton, ivSingleton);
}
private String get(@NonNull String key, @Nullable String defValue) {
String target = sp.getString(Digest.MD5.getHex(key), null);
if (target == null) {
return defValue;
} else {
try {
return new String(
Crypt.AES.decrypt(secret, iv, Base64.decode(target, Base64.DEFAULT)), CHARSET_UTF_8);
} catch (Crypt.CryptException e) {
Log.e(TAG, "value decrypt error at key :" + key, e);
return defValue;
}
}
}
private void set(@NonNull String key, @Nullable String value) {
String target;
if (value == null) {
target = null;
} else {
try {
target =
Base64.encodeToString(
Crypt.AES.encrypt(secret, iv, value.getBytes(CHARSET_UTF_8)), Base64.DEFAULT);
} catch (Crypt.CryptException e) {
Log.e(TAG, "value encrypt error at key :" + key, e);
target = null;
}
}
sp.edit().putString(Digest.MD5.getHex(key), target).apply();
}