From 7f463ae0dfcc3c0299c8ff943f8a021bfa5476f3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Dominik=20Sch=C3=BCrmann?= Date: Mon, 4 Aug 2014 02:26:34 +0200 Subject: Edit key: subkey adding, not finished --- .../ui/dialog/AddSubkeyDialogFragment.java | 328 +++++++++++++++++++++ 1 file changed, 328 insertions(+) create mode 100644 OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddSubkeyDialogFragment.java (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddSubkeyDialogFragment.java') diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddSubkeyDialogFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddSubkeyDialogFragment.java new file mode 100644 index 000000000..2031eae2a --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddSubkeyDialogFragment.java @@ -0,0 +1,328 @@ +/* + * Copyright (C) 2012-2013 Dominik Schürmann + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +package org.sufficientlysecure.keychain.ui.dialog; + +import android.annotation.TargetApi; +import android.app.AlertDialog; +import android.app.Dialog; +import android.content.DialogInterface; +import android.os.Build; +import android.os.Bundle; +import android.support.v4.app.DialogFragment; +import android.support.v4.app.FragmentActivity; +import android.text.Editable; +import android.text.TextWatcher; +import android.view.LayoutInflater; +import android.view.View; +import android.view.inputmethod.InputMethodManager; +import android.widget.AdapterView; +import android.widget.ArrayAdapter; +import android.widget.EditText; +import android.widget.Spinner; +import android.widget.TextView; + +import org.spongycastle.bcpg.sig.KeyFlags; +import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.R; +import org.sufficientlysecure.keychain.service.SaveKeyringParcel; +import org.sufficientlysecure.keychain.util.Choice; + +import java.util.ArrayList; +import java.util.Arrays; + +public class AddSubkeyDialogFragment extends DialogFragment { + + public interface OnAlgorithmSelectedListener { + public void onAlgorithmSelected(SaveKeyringParcel.SubkeyAdd newSubkey); + } + + private static final String ARG_WILL_BE_MASTER_KEY = "will_be_master_key"; + + private OnAlgorithmSelectedListener mAlgorithmSelectedListener; + private Spinner mAlgorithmSpinner; + private Spinner mKeySizeSpinner; + private TextView mCustomKeyTextView; + private EditText mCustomKeyEditText; + private TextView mCustomKeyInfoTextView; + + public void setOnAlgorithmSelectedListener(OnAlgorithmSelectedListener listener) { + mAlgorithmSelectedListener = listener; + } + + public static AddSubkeyDialogFragment newInstance(boolean willBeMasterKey) { + AddSubkeyDialogFragment frag = new AddSubkeyDialogFragment(); + Bundle args = new Bundle(); + + args.putBoolean(ARG_WILL_BE_MASTER_KEY, willBeMasterKey); + + frag.setArguments(args); + + return frag; + } + + @Override + public Dialog onCreateDialog(Bundle savedInstanceState) { + final FragmentActivity context = getActivity(); + final LayoutInflater mInflater; + + final boolean willBeMasterKey = getArguments().getBoolean(ARG_WILL_BE_MASTER_KEY); + mInflater = context.getLayoutInflater(); + + CustomAlertDialogBuilder dialog = new CustomAlertDialogBuilder(context); + + View view = mInflater.inflate(R.layout.create_key_dialog, null); + dialog.setView(view); + dialog.setTitle(R.string.title_create_key); + + mAlgorithmSpinner = (Spinner) view.findViewById(R.id.create_key_algorithm); + ArrayList choices = new ArrayList(); + choices.add(new Choice(Constants.choice.algorithm.dsa, getResources().getString( + R.string.dsa))); + if (!willBeMasterKey) { + choices.add(new Choice(Constants.choice.algorithm.elgamal, getResources().getString( + R.string.elgamal))); + } + + choices.add(new Choice(Constants.choice.algorithm.rsa, getResources().getString( + R.string.rsa))); + + ArrayAdapter adapter = new ArrayAdapter(context, + android.R.layout.simple_spinner_item, choices); + adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); + mAlgorithmSpinner.setAdapter(adapter); + // make RSA the default + for (int i = 0; i < choices.size(); ++i) { + if (choices.get(i).getId() == Constants.choice.algorithm.rsa) { + mAlgorithmSpinner.setSelection(i); + break; + } + } + + mKeySizeSpinner = (Spinner) view.findViewById(R.id.create_key_size); + // dynamic ArrayAdapter must be created (instead of ArrayAdapter.getFromResource), because it's content may change + ArrayAdapter keySizeAdapter = new ArrayAdapter(context, android.R.layout.simple_spinner_item, + new ArrayList(Arrays.asList(getResources().getStringArray(R.array.rsa_key_size_spinner_values)))); + keySizeAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); + mKeySizeSpinner.setAdapter(keySizeAdapter); + mKeySizeSpinner.setSelection(1); // Default to 4096 for the key length + + mCustomKeyTextView = (TextView) view.findViewById(R.id.custom_key_size_label); + mCustomKeyEditText = (EditText) view.findViewById(R.id.custom_key_size_input); + mCustomKeyInfoTextView = (TextView) view.findViewById(R.id.custom_key_size_info); + + dialog.setPositiveButton(android.R.string.ok, + new DialogInterface.OnClickListener() { + public void onClick(DialogInterface di, int id) { + di.dismiss(); + Choice newKeyAlgorithmChoice = (Choice) mAlgorithmSpinner.getSelectedItem(); + int newKeySize = getProperKeyLength(newKeyAlgorithmChoice.getId(), getSelectedKeyLength()); + SaveKeyringParcel.SubkeyAdd newSubkey = new SaveKeyringParcel.SubkeyAdd( + newKeyAlgorithmChoice.getId(), + newKeySize, + KeyFlags.SIGN_DATA, //TODO + null + ); + mAlgorithmSelectedListener.onAlgorithmSelected(newSubkey); + } + } + ); + + dialog.setCancelable(true); + dialog.setNegativeButton(android.R.string.cancel, + new DialogInterface.OnClickListener() { + public void onClick(DialogInterface di, int id) { + di.dismiss(); + } + }); + + final AlertDialog alertDialog = dialog.show(); + + mCustomKeyEditText.addTextChangedListener(new TextWatcher() { + @Override + public void beforeTextChanged(CharSequence s, int start, int count, int after) { + } + + @Override + public void onTextChanged(CharSequence s, int start, int before, int count) { + } + + @Override + public void afterTextChanged(Editable s) { + setOkButtonAvailability(alertDialog); + } + }); + + mKeySizeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { + @Override + public void onItemSelected(AdapterView parent, View view, int position, long id) { + setCustomKeyVisibility(); + setOkButtonAvailability(alertDialog); + } + + @Override + public void onNothingSelected(AdapterView parent) { + } + }); + + mAlgorithmSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { + @Override + public void onItemSelected(AdapterView parent, View view, int position, long id) { + setKeyLengthSpinnerValuesForAlgorithm(((Choice) parent.getSelectedItem()).getId()); + + setCustomKeyVisibility(); + setOkButtonAvailability(alertDialog); + } + + @Override + public void onNothingSelected(AdapterView parent) { + } + }); + + return alertDialog; + } + + private int getSelectedKeyLength() { + final String selectedItemString = (String) mKeySizeSpinner.getSelectedItem(); + final String customLengthString = getResources().getString(R.string.key_size_custom); + final boolean customSelected = customLengthString.equals(selectedItemString); + String keyLengthString = customSelected ? mCustomKeyEditText.getText().toString() : selectedItemString; + int keySize; + try { + keySize = Integer.parseInt(keyLengthString); + } catch (NumberFormatException e) { + keySize = 0; + } + return keySize; + } + + /** + *

RSA

+ *

for RSA algorithm, key length must be greater than 1024 (according to + * #102). Possibility to generate keys bigger + * than 8192 bits is currently disabled, because it's almost impossible to generate them on a mobile device (check + * RSA key length plot and + * Cryptographic Key Length Recommendation). Also, key length must be a + * multiplicity of 8.

+ *

ElGamal

+ *

For ElGamal algorithm, supported key lengths are 1536, 2048, 3072, 4096 or 8192 bits.

+ *

DSA

+ *

For DSA algorithm key length must be between 512 and 1024. Also, it must me dividable by 64.

+ * + * @return correct key length, according to SpongyCastle specification. Returns -1, if key length is + * inappropriate. + */ + private int getProperKeyLength(int algorithmId, int currentKeyLength) { + final int[] elGamalSupportedLengths = {1536, 2048, 3072, 4096, 8192}; + int properKeyLength = -1; + switch (algorithmId) { + case Constants.choice.algorithm.rsa: + if (currentKeyLength > 1024 && currentKeyLength <= 8192) { + properKeyLength = currentKeyLength + ((8 - (currentKeyLength % 8)) % 8); + } + break; + case Constants.choice.algorithm.elgamal: + int[] elGammalKeyDiff = new int[elGamalSupportedLengths.length]; + for (int i = 0; i < elGamalSupportedLengths.length; i++) { + elGammalKeyDiff[i] = Math.abs(elGamalSupportedLengths[i] - currentKeyLength); + } + int minimalValue = Integer.MAX_VALUE; + int minimalIndex = -1; + for (int i = 0; i < elGammalKeyDiff.length; i++) { + if (elGammalKeyDiff[i] <= minimalValue) { + minimalValue = elGammalKeyDiff[i]; + minimalIndex = i; + } + } + properKeyLength = elGamalSupportedLengths[minimalIndex]; + break; + case Constants.choice.algorithm.dsa: + if (currentKeyLength >= 512 && currentKeyLength <= 1024) { + properKeyLength = currentKeyLength + ((64 - (currentKeyLength % 64)) % 64); + } + break; + } + return properKeyLength; + } + + private void setOkButtonAvailability(AlertDialog alertDialog) { + final Choice selectedAlgorithm = (Choice) mAlgorithmSpinner.getSelectedItem(); + final int selectedKeySize = getSelectedKeyLength(); //Integer.parseInt((String) mKeySizeSpinner.getSelectedItem()); + final int properKeyLength = getProperKeyLength(selectedAlgorithm.getId(), selectedKeySize); + alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(properKeyLength > 0); + } + + private void setCustomKeyVisibility() { + final String selectedItemString = (String) mKeySizeSpinner.getSelectedItem(); + final String customLengthString = getResources().getString(R.string.key_size_custom); + final boolean customSelected = customLengthString.equals(selectedItemString); + final int visibility = customSelected ? View.VISIBLE : View.GONE; + + mCustomKeyEditText.setVisibility(visibility); + mCustomKeyTextView.setVisibility(visibility); + mCustomKeyInfoTextView.setVisibility(visibility); + + // hide keyboard after setting visibility to gone + if (visibility == View.GONE) { + InputMethodManager imm = (InputMethodManager) + getActivity().getSystemService(getActivity().INPUT_METHOD_SERVICE); + imm.hideSoftInputFromWindow(mCustomKeyEditText.getWindowToken(), 0); + } + } + + private void setKeyLengthSpinnerValuesForAlgorithm(int algorithmId) { + final ArrayAdapter keySizeAdapter = (ArrayAdapter) mKeySizeSpinner.getAdapter(); + final Object selectedItem = mKeySizeSpinner.getSelectedItem(); + keySizeAdapter.clear(); + switch (algorithmId) { + case Constants.choice.algorithm.rsa: + replaceArrayAdapterContent(keySizeAdapter, R.array.rsa_key_size_spinner_values); + mCustomKeyInfoTextView.setText(getResources().getString(R.string.key_size_custom_info_rsa)); + break; + case Constants.choice.algorithm.elgamal: + replaceArrayAdapterContent(keySizeAdapter, R.array.elgamal_key_size_spinner_values); + mCustomKeyInfoTextView.setText(""); // ElGamal does not support custom key length + break; + case Constants.choice.algorithm.dsa: + replaceArrayAdapterContent(keySizeAdapter, R.array.dsa_key_size_spinner_values); + mCustomKeyInfoTextView.setText(getResources().getString(R.string.key_size_custom_info_dsa)); + break; + } + keySizeAdapter.notifyDataSetChanged(); + + // when switching algorithm, try to select same key length as before + for (int i = 0; i < keySizeAdapter.getCount(); i++) { + if (selectedItem.equals(keySizeAdapter.getItem(i))) { + mKeySizeSpinner.setSelection(i); + break; + } + } + } + + @TargetApi(Build.VERSION_CODES.HONEYCOMB) + private void replaceArrayAdapterContent(ArrayAdapter arrayAdapter, int stringArrayResourceId) { + final String[] spinnerValuesStringArray = getResources().getStringArray(stringArrayResourceId); + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { + arrayAdapter.addAll(spinnerValuesStringArray); + } else { + for (final String value : spinnerValuesStringArray) { + arrayAdapter.add(value); + } + } + } + +} -- cgit v1.2.3