Mercurial > 510Connectbot
annotate src/com/five_ten_sg/connectbot/GeneratePubkeyActivity.java @ 360:7eb24880b111
add help files to the web documentation
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Mon, 04 Aug 2014 08:10:12 -0700 |
| parents | b40bc65fa09a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * ConnectBot: simple, powerful, open-source SSH client for Android | |
| 3 * Copyright 2007 Kenny Root, Jeffrey Sharkey | |
| 4 * | |
| 5 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 * you may not use this file except in compliance with the License. | |
| 7 * You may obtain a copy of the License at | |
| 8 * | |
| 9 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 * | |
| 11 * Unless required by applicable law or agreed to in writing, software | |
| 12 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 * See the License for the specific language governing permissions and | |
| 15 * limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 package com.five_ten_sg.connectbot; | |
| 19 | |
| 20 import java.security.KeyPair; | |
| 21 import java.security.KeyPairGenerator; | |
| 22 import java.security.PrivateKey; | |
| 23 import java.security.PublicKey; | |
| 24 | |
| 25 import com.five_ten_sg.connectbot.bean.PubkeyBean; | |
| 26 import com.five_ten_sg.connectbot.util.EntropyDialog; | |
| 27 import com.five_ten_sg.connectbot.util.EntropyView; | |
| 28 import com.five_ten_sg.connectbot.util.OnEntropyGatheredListener; | |
| 29 import com.five_ten_sg.connectbot.util.PubkeyDatabase; | |
| 30 import com.five_ten_sg.connectbot.util.PubkeyUtils; | |
| 31 import android.app.Activity; | |
| 32 import android.app.Dialog; | |
| 33 import android.app.ProgressDialog; | |
| 34 import android.os.Bundle; | |
| 35 import android.text.Editable; | |
| 36 import android.text.TextWatcher; | |
| 37 import android.util.Log; | |
| 38 import android.view.LayoutInflater; | |
| 39 import android.view.View; | |
| 40 import android.view.View.OnClickListener; | |
| 41 import android.view.View.OnFocusChangeListener; | |
| 42 import android.widget.Button; | |
| 43 import android.widget.CheckBox; | |
| 44 import android.widget.EditText; | |
| 45 import android.widget.RadioGroup; | |
| 46 import android.widget.RadioGroup.OnCheckedChangeListener; | |
| 47 import android.widget.SeekBar; | |
| 48 import android.widget.SeekBar.OnSeekBarChangeListener; | |
| 49 | |
|
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50 import ch.ethz.ssh2.crypto.SecureRandomFix; |
|
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51 import ch.ethz.ssh2.signature.ECDSASHA2Verify; |
| 0 | 52 |
| 53 public class GeneratePubkeyActivity extends Activity implements OnEntropyGatheredListener { | |
| 54 public final static String TAG = "ConnectBot.GeneratePubkeyActivity"; | |
| 55 | |
| 56 private static final int RSA_MINIMUM_BITS = 768; | |
| 57 final static int DEFAULT_BITS = 2048; | |
| 58 final static int DSA_BITS = 1024; | |
| 59 final static int[] ECDSA_SIZES = ECDSASHA2Verify.getCurveSizes(); | |
| 60 final static int ECDSA_DEFAULT_BITS = ECDSA_SIZES[0]; | |
| 61 | |
| 62 private LayoutInflater inflater = null; | |
| 63 | |
| 64 private EditText nickname; | |
| 65 private RadioGroup keyTypeGroup; | |
| 66 private SeekBar bitsSlider; | |
| 67 private EditText bitsText; | |
| 68 private CheckBox unlockAtStartup; | |
| 69 private CheckBox confirmUse; | |
| 70 private Button save; | |
| 71 private Dialog entropyDialog; | |
| 72 private ProgressDialog progress; | |
| 73 | |
| 74 private EditText password1, password2; | |
| 75 | |
| 76 private String keyType = PubkeyDatabase.KEY_TYPE_RSA; | |
| 77 private int minBits = RSA_MINIMUM_BITS; | |
| 78 private int bits = DEFAULT_BITS; | |
| 79 | |
| 80 private byte[] entropy; | |
| 81 | |
| 82 @Override | |
| 83 public void onCreate(Bundle icicle) { | |
| 84 super.onCreate(icicle); | |
| 85 setContentView(R.layout.act_generatepubkey); | |
| 86 nickname = (EditText) findViewById(R.id.nickname); | |
| 87 keyTypeGroup = (RadioGroup) findViewById(R.id.key_type); | |
| 88 bitsText = (EditText) findViewById(R.id.bits); | |
| 89 bitsSlider = (SeekBar) findViewById(R.id.bits_slider); | |
| 90 password1 = (EditText) findViewById(R.id.password1); | |
| 91 password2 = (EditText) findViewById(R.id.password2); | |
| 92 unlockAtStartup = (CheckBox) findViewById(R.id.unlock_at_startup); | |
| 93 confirmUse = (CheckBox) findViewById(R.id.confirm_use); | |
| 94 save = (Button) findViewById(R.id.save); | |
| 95 inflater = LayoutInflater.from(this); | |
| 96 nickname.addTextChangedListener(textChecker); | |
| 97 password1.addTextChangedListener(textChecker); | |
| 98 password2.addTextChangedListener(textChecker); | |
| 99 keyTypeGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() { | |
| 100 public void onCheckedChanged(RadioGroup group, int checkedId) { | |
| 101 if (checkedId == R.id.rsa) { | |
| 102 minBits = RSA_MINIMUM_BITS; | |
| 103 bitsSlider.setEnabled(true); | |
| 104 bitsSlider.setProgress(DEFAULT_BITS - minBits); | |
| 105 bitsText.setText(String.valueOf(DEFAULT_BITS)); | |
| 106 bitsText.setEnabled(true); | |
| 107 keyType = PubkeyDatabase.KEY_TYPE_RSA; | |
| 108 } | |
| 109 else if (checkedId == R.id.dsa) { | |
| 110 // DSA keys can only be 1024 bits | |
| 111 bitsSlider.setEnabled(false); | |
| 112 bitsSlider.setProgress(DSA_BITS - minBits); | |
| 113 bitsText.setText(String.valueOf(DSA_BITS)); | |
| 114 bitsText.setEnabled(false); | |
| 115 keyType = PubkeyDatabase.KEY_TYPE_DSA; | |
| 116 } | |
| 117 else if (checkedId == R.id.ec) { | |
| 118 minBits = ECDSA_DEFAULT_BITS; | |
| 119 bitsSlider.setEnabled(true); | |
| 120 bitsSlider.setProgress(ECDSA_DEFAULT_BITS - minBits); | |
| 121 bitsText.setText(String.valueOf(ECDSA_DEFAULT_BITS)); | |
| 122 bitsText.setEnabled(true); | |
| 123 keyType = PubkeyDatabase.KEY_TYPE_EC; | |
| 124 } | |
| 125 } | |
| 126 }); | |
| 127 bitsSlider.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { | |
| 128 public void onProgressChanged(SeekBar seekBar, int progress, | |
| 129 boolean fromTouch) { | |
| 130 if (PubkeyDatabase.KEY_TYPE_EC.equals(keyType)) { | |
| 131 bits = getClosestFieldSize(progress + minBits); | |
| 132 seekBar.setProgress(bits - minBits); | |
| 133 } | |
| 134 else { | |
| 135 // Stay evenly divisible by 8 because it looks nicer to have | |
| 136 // 2048 than 2043 bits. | |
| 137 final int ourProgress = progress - (progress % 8); | |
| 138 bits = minBits + ourProgress; | |
| 139 } | |
| 140 | |
| 141 bitsText.setText(String.valueOf(bits)); | |
| 142 } | |
| 143 public void onStartTrackingTouch(SeekBar seekBar) { | |
| 144 // We don't care about the start. | |
| 145 } | |
| 146 public void onStopTrackingTouch(SeekBar seekBar) { | |
| 147 // We don't care about the stop. | |
| 148 } | |
| 149 }); | |
| 150 bitsText.setOnFocusChangeListener(new OnFocusChangeListener() { | |
| 151 public void onFocusChange(View v, boolean hasFocus) { | |
| 152 if (!hasFocus) { | |
| 153 final boolean isEc = PubkeyDatabase.KEY_TYPE_EC.equals(keyType); | |
| 154 | |
| 155 try { | |
| 156 bits = Integer.parseInt(bitsText.getText().toString()); | |
| 157 | |
| 158 if (bits < minBits) { | |
| 159 bits = minBits; | |
| 160 bitsText.setText(String.valueOf(bits)); | |
| 161 } | |
| 162 | |
| 163 if (isEc) { | |
| 164 bits = getClosestFieldSize(bits); | |
| 165 } | |
| 166 } | |
| 167 catch (NumberFormatException nfe) { | |
| 168 bits = isEc ? ECDSA_DEFAULT_BITS : DEFAULT_BITS; | |
| 169 bitsText.setText(String.valueOf(bits)); | |
| 170 } | |
| 171 | |
| 172 bitsSlider.setProgress(bits - minBits); | |
| 173 } | |
| 174 } | |
| 175 }); | |
| 176 save.setOnClickListener(new OnClickListener() { | |
| 177 public void onClick(View view) { | |
| 178 GeneratePubkeyActivity.this.save.setEnabled(false); | |
| 179 GeneratePubkeyActivity.this.startEntropyGather(); | |
| 180 } | |
| 181 }); | |
| 182 } | |
| 183 | |
| 184 private void checkEntries() { | |
| 185 boolean allowSave = true; | |
| 186 | |
| 187 if (!password1.getText().toString().equals(password2.getText().toString())) | |
| 188 allowSave = false; | |
| 189 | |
| 190 if (nickname.getText().length() == 0) | |
| 191 allowSave = false; | |
| 192 | |
| 193 save.setEnabled(allowSave); | |
| 194 } | |
| 195 | |
| 196 private void startEntropyGather() { | |
| 197 final View entropyView = inflater.inflate(R.layout.dia_gatherentropy, null, false); | |
| 198 ((EntropyView)entropyView.findViewById(R.id.entropy)).addOnEntropyGatheredListener(GeneratePubkeyActivity.this); | |
| 199 entropyDialog = new EntropyDialog(GeneratePubkeyActivity.this, entropyView); | |
| 200 entropyDialog.show(); | |
| 201 } | |
| 202 | |
| 203 public void onEntropyGathered(byte[] entropy) { | |
| 204 // For some reason the entropy dialog was aborted, exit activity | |
| 205 if (entropy == null) { | |
| 206 finish(); | |
| 207 return; | |
| 208 } | |
| 209 | |
| 210 this.entropy = entropy.clone(); | |
| 211 int numSetBits = 0; | |
| 212 | |
| 213 for (int i = 0; i < 20; i++) | |
| 214 numSetBits += measureNumberOfSetBits(this.entropy[i]); | |
| 215 | |
| 216 Log.d(TAG, "Entropy distribution=" + (int)(100.0 * numSetBits / 160.0) + "%"); | |
| 217 Log.d(TAG, "entropy gathered; attemping to generate key..."); | |
| 218 startKeyGen(); | |
| 219 } | |
| 220 | |
| 221 private void startKeyGen() { | |
| 222 progress = new ProgressDialog(GeneratePubkeyActivity.this); | |
| 223 progress.setMessage(GeneratePubkeyActivity.this.getResources().getText(R.string.pubkey_generating)); | |
| 224 progress.setIndeterminate(true); | |
| 225 progress.setCancelable(false); | |
| 226 progress.show(); | |
| 227 Thread keyGenThread = new Thread(mKeyGen); | |
| 228 keyGenThread.setName("KeyGen"); | |
| 229 keyGenThread.start(); | |
| 230 } | |
| 231 | |
| 232 final private Runnable mKeyGen = new Runnable() { | |
| 233 public void run() { | |
| 234 try { | |
| 235 boolean encrypted = false; | |
| 236 int tmpbits = bits; | |
| 237 | |
| 238 if (keyType == PubkeyDatabase.KEY_TYPE_DSA) | |
| 239 tmpbits = DSA_BITS; | |
| 240 | |
|
344
b40bc65fa09a
compensate for SecureRandom bug on older devices
Carl Byington <carl@five-ten-sg.com>
parents:
273
diff
changeset
|
241 SecureRandomFix random = new SecureRandomFix(); |
| 0 | 242 // Work around JVM bug |
| 243 random.nextInt(); | |
| 244 random.setSeed(entropy); | |
| 245 KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(keyType); | |
| 246 keyPairGen.initialize(tmpbits, random); | |
| 247 KeyPair pair = keyPairGen.generateKeyPair(); | |
| 248 PrivateKey priv = pair.getPrivate(); | |
| 249 PublicKey pub = pair.getPublic(); | |
| 250 String secret = password1.getText().toString(); | |
| 251 | |
| 252 if (secret.length() > 0) | |
| 253 encrypted = true; | |
| 254 | |
| 255 Log.d(TAG, "private: " + PubkeyUtils.formatKey(priv)); | |
| 256 Log.d(TAG, "public: " + PubkeyUtils.formatKey(pub)); | |
| 257 PubkeyBean pubkey = new PubkeyBean(); | |
| 258 pubkey.setNickname(nickname.getText().toString()); | |
| 259 pubkey.setType(keyType); | |
| 260 pubkey.setPrivateKey(PubkeyUtils.getEncodedPrivate(priv, secret)); | |
| 261 pubkey.setPublicKey(pub.getEncoded()); | |
| 262 pubkey.setEncrypted(encrypted); | |
| 263 pubkey.setStartup(unlockAtStartup.isChecked()); | |
| 264 pubkey.setConfirmUse(confirmUse.isChecked()); | |
| 265 PubkeyDatabase pubkeydb = new PubkeyDatabase(GeneratePubkeyActivity.this); | |
| 266 pubkeydb.savePubkey(pubkey); | |
| 267 pubkeydb.close(); | |
| 268 } | |
| 269 catch (Exception e) { | |
| 270 Log.e(TAG, "Could not generate key pair"); | |
| 271 e.printStackTrace(); | |
| 272 } | |
| 273 | |
| 274 GeneratePubkeyActivity.this.runOnUiThread(new Runnable() { | |
| 275 public void run() { | |
| 276 progress.dismiss(); | |
| 277 GeneratePubkeyActivity.this.finish(); | |
| 278 } | |
| 279 }); | |
| 280 } | |
| 281 }; | |
| 282 | |
| 283 final private TextWatcher textChecker = new TextWatcher() { | |
| 284 public void afterTextChanged(Editable s) {} | |
| 285 public void beforeTextChanged(CharSequence s, int start, int count, | |
| 286 int after) {} | |
| 287 public void onTextChanged(CharSequence s, int start, int before, | |
| 288 int count) { | |
| 289 checkEntries(); | |
| 290 } | |
| 291 }; | |
| 292 | |
| 293 private int measureNumberOfSetBits(byte b) { | |
| 294 int numSetBits = 0; | |
| 295 | |
| 296 for (int i = 0; i < 8; i++) { | |
| 297 if ((b & 1) == 1) | |
| 298 numSetBits++; | |
| 299 | |
| 300 b >>= 1; | |
| 301 } | |
| 302 | |
| 303 return numSetBits; | |
| 304 } | |
| 305 | |
| 306 private int getClosestFieldSize(int bits) { | |
| 307 int outBits = ECDSA_DEFAULT_BITS; | |
| 308 int distance = Math.abs(bits - ECDSA_DEFAULT_BITS); | |
| 309 | |
| 310 for (int i = 1; i < ECDSA_SIZES.length; i++) { | |
| 311 int thisDistance = Math.abs(bits - ECDSA_SIZES[i]); | |
| 312 | |
| 313 if (thisDistance < distance) { | |
| 314 distance = thisDistance; | |
| 315 outBits = ECDSA_SIZES[i]; | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 return outBits; | |
| 320 } | |
| 321 } |