diff options
Diffstat (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/SubkeysAddedAdapter.java')
| -rw-r--r-- | OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/SubkeysAddedAdapter.java | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/SubkeysAddedAdapter.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/SubkeysAddedAdapter.java new file mode 100644 index 000000000..25509fee5 --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/SubkeysAddedAdapter.java @@ -0,0 +1,361 @@ +/* + * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de> + * + * 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 <http://www.gnu.org/licenses/>. + */ + +package org.sufficientlysecure.keychain.ui.adapter; + +import android.annotation.TargetApi; +import android.app.Activity; +import android.app.AlertDialog; +import android.content.Context; +import android.content.DialogInterface; +import android.os.Build; +import android.text.Editable; +import android.text.TextUtils; +import android.text.TextWatcher; +import android.util.Patterns; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.view.inputmethod.InputMethodManager; +import android.widget.AdapterView; +import android.widget.ArrayAdapter; +import android.widget.AutoCompleteTextView; +import android.widget.EditText; +import android.widget.ImageButton; +import android.widget.Spinner; +import android.widget.TextView; + +import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.R; +import org.sufficientlysecure.keychain.helper.ContactHelper; +import org.sufficientlysecure.keychain.service.SaveKeyringParcel; +import org.sufficientlysecure.keychain.ui.dialog.CreateKeyDialogFragment; +import org.sufficientlysecure.keychain.util.Choice; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import java.util.regex.Matcher; + +public class SubkeysAddedAdapter extends ArrayAdapter<SaveKeyringParcel.SubkeyAdd> { + private LayoutInflater mInflater; + private Activity mActivity; + + public interface OnAlgorithmSelectedListener { + public void onAlgorithmSelected(Choice algorithmChoice, int keySize); + } + + // hold a private reference to the underlying data List + private List<SaveKeyringParcel.SubkeyAdd> mData; + + public SubkeysAddedAdapter(Activity activity, List<SaveKeyringParcel.SubkeyAdd> data) { + super(activity, -1, data); + mActivity = activity; + mInflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); + mData = data; + } + + static class ViewHolder { + public OnAlgorithmSelectedListener mAlgorithmSelectedListener; + public Spinner mAlgorithmSpinner; + public Spinner mKeySizeSpinner; + public TextView mCustomKeyTextView; + public EditText mCustomKeyEditText; + public TextView mCustomKeyInfoTextView; + public ImageButton vDelete; + // also hold a reference to the model item + public SaveKeyringParcel.SubkeyAdd mModel; + } + + public View getView(final int position, View convertView, ViewGroup parent) { + if (convertView == null) { + // Not recycled, inflate a new view + convertView = mInflater.inflate(R.layout.edit_key_subkey_added_item, null); + final ViewHolder holder = new ViewHolder(); + holder.mAlgorithmSpinner = (Spinner) convertView.findViewById(R.id.create_key_algorithm); + holder.mKeySizeSpinner = (Spinner) convertView.findViewById(R.id.create_key_size); + holder.mCustomKeyTextView = (TextView) convertView.findViewById(R.id.custom_key_size_label); + holder.mCustomKeyEditText = (EditText) convertView.findViewById(R.id.custom_key_size_input); + holder.mCustomKeyInfoTextView = (TextView) convertView.findViewById(R.id.custom_key_size_info); + holder.vDelete = (ImageButton) convertView.findViewById(R.id.subkey_added_item_delete); + convertView.setTag(holder); + + holder.mAlgorithmSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { + @Override + public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { + Choice newKeyAlgorithmChoice = (Choice) holder.mAlgorithmSpinner.getSelectedItem(); + // update referenced model item + holder.mModel.mAlgorithm = newKeyAlgorithmChoice.getId(); + } + + @Override + public void onNothingSelected(AdapterView<?> parent) { + } + }); + + holder.mKeySizeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { + @Override + public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { + Choice newKeyAlgorithmChoice = (Choice) holder.mAlgorithmSpinner.getSelectedItem(); + int newKeySize = getProperKeyLength(newKeyAlgorithmChoice.getId(), + getSelectedKeyLength(holder.mKeySizeSpinner, holder.mCustomKeyEditText)); + // update referenced model item + holder.mModel.mKeysize = newKeySize; + } + + @Override + public void onNothingSelected(AdapterView<?> parent) { + } + }); + + holder.vDelete.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View v) { + // remove reference model item from adapter (data and notify about change) + SubkeysAddedAdapter.this.remove(holder.mModel); + } + }); + + } + final ViewHolder holder = (ViewHolder) convertView.getTag(); + + // save reference to model item + holder.mModel = getItem(position); + + // TODO + boolean wouldBeMasterKey = false; +// boolean wouldBeMasterKey = (childCount == 0); + + ArrayList<Choice> choices = new ArrayList<Choice>(); + choices.add(new Choice(Constants.choice.algorithm.dsa, mActivity.getResources().getString( + R.string.dsa))); + if (!wouldBeMasterKey) { + choices.add(new Choice(Constants.choice.algorithm.elgamal, mActivity.getResources().getString( + R.string.elgamal))); + } + + choices.add(new Choice(Constants.choice.algorithm.rsa, mActivity.getResources().getString( + R.string.rsa))); + + ArrayAdapter<Choice> adapter = new ArrayAdapter<Choice>(mActivity, + android.R.layout.simple_spinner_item, choices); + adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); + holder.mAlgorithmSpinner.setAdapter(adapter); + // make RSA the default + for (int i = 0; i < choices.size(); ++i) { + if (choices.get(i).getId() == Constants.choice.algorithm.rsa) { + holder.mAlgorithmSpinner.setSelection(i); + break; + } + } + + // dynamic ArrayAdapter must be created (instead of ArrayAdapter.getFromResource), because it's content may change + ArrayAdapter<CharSequence> keySizeAdapter = new ArrayAdapter<CharSequence>(mActivity, android.R.layout.simple_spinner_item, + new ArrayList<CharSequence>(Arrays.asList(mActivity.getResources().getStringArray(R.array.rsa_key_size_spinner_values)))); + keySizeAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); + holder.mKeySizeSpinner.setAdapter(keySizeAdapter); + holder.mKeySizeSpinner.setSelection(1); // Default to 4096 for the key length + + holder.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); + } + }); + + holder.mKeySizeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { + @Override + public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { + setCustomKeyVisibility(holder.mKeySizeSpinner, holder.mCustomKeyEditText, + holder.mCustomKeyTextView, holder.mCustomKeyInfoTextView); +// setOkButtonAvailability(alertDialog); + } + + @Override + public void onNothingSelected(AdapterView<?> parent) { + } + }); + + holder.mAlgorithmSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { + @Override + public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { + setKeyLengthSpinnerValuesForAlgorithm(((Choice) parent.getSelectedItem()).getId(), + holder.mKeySizeSpinner, holder.mCustomKeyInfoTextView); + + setCustomKeyVisibility(holder.mKeySizeSpinner, holder.mCustomKeyEditText, + holder.mCustomKeyTextView, holder.mCustomKeyInfoTextView); +// setOkButtonAvailability(alertDialog); + } + + @Override + public void onNothingSelected(AdapterView<?> parent) { + } + }); +// +// holder.vAddress.setText(holder.mModel.address); +// holder.vAddress.setThreshold(1); // Start working from first character +// holder.vAddress.setAdapter(mAutoCompleteEmailAdapter); +// +// holder.vName.setText(holder.mModel.name); +// holder.vName.setThreshold(1); // Start working from first character +// holder.vName.setAdapter(mAutoCompleteNameAdapter); +// +// holder.vComment.setText(holder.mModel.comment); + + return convertView; + } + + + private int getSelectedKeyLength(Spinner keySizeSpinner, EditText customKeyEditText) { + final String selectedItemString = (String) keySizeSpinner.getSelectedItem(); + final String customLengthString = mActivity.getResources().getString(R.string.key_size_custom); + final boolean customSelected = customLengthString.equals(selectedItemString); + String keyLengthString = customSelected ? customKeyEditText.getText().toString() : selectedItemString; + int keySize; + try { + keySize = Integer.parseInt(keyLengthString); + } catch (NumberFormatException e) { + keySize = 0; + } + return keySize; + } + + /** + * <h3>RSA</h3> + * <p>for RSA algorithm, key length must be greater than 1024 (according to + * <a href="https://github.com/open-keychain/open-keychain/issues/102">#102</a>). Possibility to generate keys bigger + * than 8192 bits is currently disabled, because it's almost impossible to generate them on a mobile device (check + * <a href="http://www.javamex.com/tutorials/cryptography/rsa_key_length.shtml">RSA key length plot</a> and + * <a href="http://www.keylength.com/">Cryptographic Key Length Recommendation</a>). Also, key length must be a + * multiplicity of 8.</p> + * <h3>ElGamal</h3> + * <p>For ElGamal algorithm, supported key lengths are 1536, 2048, 3072, 4096 or 8192 bits.</p> + * <h3>DSA</h3> + * <p>For DSA algorithm key length must be between 512 and 1024. Also, it must me dividable by 64.</p> + * + * @return correct key length, according to SpongyCastle specification. Returns <code>-1</code>, 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; + } + + // TODO: make this an error message on the field +// private boolean 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(Spinner keySizeSpinner, EditText customkeyedittext, TextView customKeyTextView, TextView customKeyInfoTextView) { + final String selectedItemString = (String) keySizeSpinner.getSelectedItem(); + final String customLengthString = mActivity.getResources().getString(R.string.key_size_custom); + final boolean customSelected = customLengthString.equals(selectedItemString); + final int visibility = customSelected ? View.VISIBLE : View.GONE; + + customkeyedittext.setVisibility(visibility); + customKeyTextView.setVisibility(visibility); + customKeyInfoTextView.setVisibility(visibility); + + // hide keyboard after setting visibility to gone + if (visibility == View.GONE) { + InputMethodManager imm = (InputMethodManager) + mActivity.getSystemService(mActivity.INPUT_METHOD_SERVICE); + imm.hideSoftInputFromWindow(customkeyedittext.getWindowToken(), 0); + } + } + + private void setKeyLengthSpinnerValuesForAlgorithm(int algorithmId, Spinner keySizeSpinner, TextView customKeyInfoTextView) { + final ArrayAdapter<CharSequence> keySizeAdapter = (ArrayAdapter<CharSequence>) keySizeSpinner.getAdapter(); + final Object selectedItem = keySizeSpinner.getSelectedItem(); + keySizeAdapter.clear(); + switch (algorithmId) { + case Constants.choice.algorithm.rsa: + replaceArrayAdapterContent(keySizeAdapter, R.array.rsa_key_size_spinner_values); + customKeyInfoTextView.setText(mActivity.getResources().getString(R.string.key_size_custom_info_rsa)); + break; + case Constants.choice.algorithm.elgamal: + replaceArrayAdapterContent(keySizeAdapter, R.array.elgamal_key_size_spinner_values); + customKeyInfoTextView.setText(""); // ElGamal does not support custom key length + break; + case Constants.choice.algorithm.dsa: + replaceArrayAdapterContent(keySizeAdapter, R.array.dsa_key_size_spinner_values); + customKeyInfoTextView.setText(mActivity.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))) { + keySizeSpinner.setSelection(i); + break; + } + } + } + + @TargetApi(Build.VERSION_CODES.HONEYCOMB) + private void replaceArrayAdapterContent(ArrayAdapter<CharSequence> arrayAdapter, int stringArrayResourceId) { + final String[] spinnerValuesStringArray = mActivity.getResources().getStringArray(stringArrayResourceId); + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { + arrayAdapter.addAll(spinnerValuesStringArray); + } else { + for (final String value : spinnerValuesStringArray) { + arrayAdapter.add(value); + } + } + } + +} |