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am a97fe138: Merge "Exclude ephemeral networks from wifi backup" into lmp-mr1-dev

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* commit 'a97fe1387df731ddbbdae7c75dfbdfa4f1eb0339':
  Exclude ephemeral networks from wifi backup
This commit is contained in:
Christopher Tate
2015-01-09 20:16:21 +00:00
committed by Android Git Automerger
parent 0cb736f754 a97fe1387d
commit 68dabada9e
1 changed files with 105 additions and 29 deletions
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134
packages/SettingsProvider/src/com/android/providers/settings/SettingsBackupAgent.java
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@@ -25,6 +25,8 @@ import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiConfiguration.KeyMgmt;
import android.net.wifi.WifiManager;
import android.os.FileUtils;
import android.os.Handler;
@@ -33,9 +35,12 @@ import android.os.Process;
import android.provider.Settings;
import android.util.Log;
import libcore.io.IoUtils;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.CharArrayReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
@@ -48,11 +53,15 @@ import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.zip.CRC32;
/**
@@ -138,6 +147,7 @@ public class SettingsBackupAgent extends BackupAgentHelper {
String ssid = ""; // equals() and hashCode() need these to be non-null
String key_mgmt = "";
boolean certUsed = false;
boolean hasWepKey = false;
final ArrayList<String> rawLines = new ArrayList<String>();
public static Network readFromStream(BufferedReader in) {
@@ -164,9 +174,9 @@ public class SettingsBackupAgent extends BackupAgentHelper {
rawLines.add(line);
// remember the ssid and key_mgmt lines for duplicate culling
if (line.startsWith("ssid")) {
if (line.startsWith("ssid=")) {
ssid = line;
} else if (line.startsWith("key_mgmt")) {
} else if (line.startsWith("key_mgmt=")) {
key_mgmt = line;
} else if (line.startsWith("client_cert=")) {
certUsed = true;
@@ -174,6 +184,8 @@ public class SettingsBackupAgent extends BackupAgentHelper {
certUsed = true;
} else if (line.startsWith("ca_path=")) {
certUsed = true;
} else if (line.startsWith("wep_")) {
hasWepKey = true;
}
}
@@ -193,6 +205,56 @@ public class SettingsBackupAgent extends BackupAgentHelper {
Log.v(TAG, "}");
}
// Calculate the equivalent of WifiConfiguration's configKey()
public String configKey() {
if (ssid == null) {
// No SSID => malformed network definition
return null;
}
final String bareSsid = ssid.substring(ssid.indexOf('=') + 1);
final BitSet types = new BitSet();
if (key_mgmt == null) {
// no key_mgmt specified; this is defined as equivalent to "WPA-PSK WPA-EAP"
types.set(KeyMgmt.WPA_PSK);
types.set(KeyMgmt.WPA_EAP);
} else {
// Need to parse the key_mgmt line
final String bareKeyMgmt = key_mgmt.substring(key_mgmt.indexOf('=') + 1);
String[] typeStrings = bareKeyMgmt.split("\\s+");
// Parse out all the key management regimes permitted for this network. The literal
// strings here are the standard values permitted in wpa_supplicant.conf.
for (int i = 0; i < typeStrings.length; i++) {
final String ktype = typeStrings[i];
if (ktype.equals("WPA-PSK")) {
Log.v(TAG, " + setting WPA_PSK bit");
types.set(KeyMgmt.WPA_PSK);
} else if (ktype.equals("WPA-EAP")) {
Log.v(TAG, " + setting WPA_EAP bit");
types.set(KeyMgmt.WPA_EAP);
} else if (ktype.equals("IEEE8021X")) {
Log.v(TAG, " + setting IEEE8021X bit");
types.set(KeyMgmt.IEEE8021X);
}
}
}
// Now build the canonical config key paralleling the WifiConfiguration semantics
final String key;
if (types.get(KeyMgmt.WPA_PSK)) {
key = bareSsid + KeyMgmt.strings[KeyMgmt.WPA_PSK];
} else if (types.get(KeyMgmt.WPA_EAP) || types.get(KeyMgmt.IEEE8021X)) {
key = bareSsid + KeyMgmt.strings[KeyMgmt.WPA_EAP];
} else if (hasWepKey) {
key = bareSsid + "WEP"; // hardcoded this way in WifiConfiguration
} else {
key = bareSsid + KeyMgmt.strings[KeyMgmt.NONE];
}
return key;
}
// Same approach as Pair.equals() and Pair.hashCode()
@Override
public boolean equals(Object o) {
@@ -216,6 +278,17 @@ public class SettingsBackupAgent extends BackupAgentHelper {
}
}
boolean networkInWhitelist(Network net, List<WifiConfiguration> whitelist) {
final String netConfigKey = net.configKey();
final int N = whitelist.size();
for (int i = 0; i < N; i++) {
if (Objects.equals(netConfigKey, whitelist.get(i).configKey(true))) {
return true;
}
}
return false;
}
// Ingest multiple wifi config file fragments, looking for network={} blocks
// and eliminating duplicates
class WifiNetworkSettings {
@@ -223,7 +296,7 @@ public class SettingsBackupAgent extends BackupAgentHelper {
final HashSet<Network> mKnownNetworks = new HashSet<Network>();
final ArrayList<Network> mNetworks = new ArrayList<Network>(8);
public void readNetworks(BufferedReader in) {
public void readNetworks(BufferedReader in, List<WifiConfiguration> whitelist) {
try {
String line;
while (in.ready()) {
@@ -232,6 +305,15 @@ public class SettingsBackupAgent extends BackupAgentHelper {
// Parse out 'network=' decls so we can ignore duplicates
if (line.startsWith("network")) {
Network net = Network.readFromStream(in);
if (whitelist != null) {
if (!networkInWhitelist(net, whitelist)) {
if (DEBUG_BACKUP) {
Log.v(TAG, "Network not in whitelist, skipping: "
+ net.ssid + " / " + net.key_mgmt);
}
continue;
}
}
if (! mKnownNetworks.contains(net)) {
if (DEBUG_BACKUP) {
Log.v(TAG, "Adding " + net.ssid + " / " + net.key_mgmt);
@@ -844,24 +926,23 @@ public class SettingsBackupAgent extends BackupAgentHelper {
BufferedReader br = null;
try {
File file = new File(filename);
if (file.exists()) {
br = new BufferedReader(new FileReader(file));
StringBuffer relevantLines = new StringBuffer();
boolean started = false;
String line;
while ((line = br.readLine()) != null) {
if (!started && line.startsWith("network")) {
started = true;
}
if (started) {
relevantLines.append(line).append("\n");
}
}
if (relevantLines.length() > 0) {
return relevantLines.toString().getBytes();
} else {
return EMPTY_DATA;
}
if (!file.exists()) {
return EMPTY_DATA;
}
WifiManager wifi = (WifiManager) getSystemService(WIFI_SERVICE);
List<WifiConfiguration> configs = wifi.getConfiguredNetworks();
WifiNetworkSettings fromFile = new WifiNetworkSettings();
br = new BufferedReader(new FileReader(file));
fromFile.readNetworks(br, configs);
// Write the parsed networks into a packed byte array
if (fromFile.mKnownNetworks.size() > 0) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
OutputStreamWriter out = new OutputStreamWriter(bos);
fromFile.write(out);
return bos.toByteArray();
} else {
return EMPTY_DATA;
}
@@ -869,12 +950,7 @@ public class SettingsBackupAgent extends BackupAgentHelper {
Log.w(TAG, "Couldn't backup " + filename);
return EMPTY_DATA;
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
}
}
IoUtils.closeQuietly(br);
}
}
@@ -886,7 +962,7 @@ public class SettingsBackupAgent extends BackupAgentHelper {
if (supplicantFile.exists()) {
// Retain the existing APs; we'll append the restored ones to them
BufferedReader in = new BufferedReader(new FileReader(FILE_WIFI_SUPPLICANT));
supplicantImage.readNetworks(in);
supplicantImage.readNetworks(in, null);
in.close();
supplicantFile.delete();
@@ -897,7 +973,7 @@ public class SettingsBackupAgent extends BackupAgentHelper {
char[] restoredAsBytes = new char[size];
for (int i = 0; i < size; i++) restoredAsBytes[i] = (char) bytes[i];
BufferedReader in = new BufferedReader(new CharArrayReader(restoredAsBytes));
supplicantImage.readNetworks(in);
supplicantImage.readNetworks(in, null);
if (DEBUG_BACKUP) {
Log.v(TAG, "Final AP list:");