Mirrors/FairEmail
1
0
Fork 0
mirror of https://github.com/M66B/FairEmail.git synced 2026-03-30 13:47:05 +02:00
Code Issues Packages Projects Releases Wiki Activity

Cloud sync: refactoring

Browse Source
This commit is contained in:
M66B
2023-01-15 12:15:16 +01:00
parent 617d2d964c
commit f27110acaa
2 changed files with 251 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
app/src/main/java/eu/faircode/email/CloudSync.java
View File

@@ -35,7 +35,11 @@ import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
@@ -47,15 +51,57 @@ import javax.net.ssl.HttpsURLConnection;
public class CloudSync {
private static final int CLOUD_TIMEOUT = 10 * 1000; // timeout
private static final int BATCH_SIZE = 25;
private static final Map<String, Pair<byte[], byte[]>> keyCache = new HashMap<>();
public static JSONObject perform(Context context, String user, String password, JSONObject jrequest)
throws GeneralSecurityException, JSONException, IOException {
List<JSONObject> responses = new ArrayList<>();
for (JSONArray batch : partition(jrequest.getJSONArray("items"))) {
jrequest.put("items", batch);
responses.add(_perform(context, user, password, jrequest));
}
if (responses.size() == 1)
return responses.get(0);
else {
int count = 0;
JSONArray jall = new JSONArray();
for (JSONObject response : responses) {
JSONArray jitems = response.getJSONArray("items");
for (int i = 0; i < jitems.length(); i++)
jall.put(jitems.getJSONObject(i));
count += response.optInt("count", 0);
}
JSONObject jresponse = responses.get(0);
jresponse.put("items", jall);
jresponse.put("count", count);
return jresponse;
}
}
private static JSONObject _perform(Context context, String user, String password, JSONObject jrequest)
throws GeneralSecurityException, JSONException, IOException {
byte[] salt = MessageDigest.getInstance("SHA256").digest(user.getBytes());
byte[] huser = MessageDigest.getInstance("SHA256").digest(salt);
byte[] userid = Arrays.copyOfRange(huser, 0, 8);
String cloudUser = Base64.encodeToString(userid, Base64.NO_PADDING | Base64.NO_WRAP);
Pair<byte[], byte[]> key = getKeyPair(salt, password);
Pair<byte[], byte[]> key;
String lookup = Helper.hex(salt) + ":" + password;
synchronized (keyCache) {
key = keyCache.get(lookup);
}
if (key == null) {
Log.i("Cloud generating key");
key = getKeyPair(salt, password);
synchronized (keyCache) {
keyCache.put(lookup, key);
}
} else {
Log.i("Cloud using cached key");
}
String cloudPassword = Base64.encodeToString(key.first, Base64.NO_PADDING | Base64.NO_WRAP);
jrequest.put("version", 1);
@@ -67,20 +113,24 @@ public class CloudSync {
JSONArray jitems = jrequest.getJSONArray("items");
for (int i = 0; i < jitems.length(); i++) {
JSONObject jitem = jitems.getJSONObject(i);
int revision = jitem.getInt("revision");
int revision = jitem.getInt("rev");
String k = jitem.getString("key");
jitem.put("key", transform(k, key.second, null, true));
if (jitem.has("value") && !jitem.isNull("value")) {
String v = jitem.getString("value");
jitem.put("value", transform(v, key.second, revision, true));
String v = null;
if (jitem.has("val") && !jitem.isNull("val")) {
v = jitem.getString("val");
jitem.put("val", transform(v, key.second, revision, true));
}
v = (v == null ? null : "#" + v.length());
Log.i("Cloud > " + k + "=" + v + " @" + revision);
}
}
String request = jrequest.toString();
Log.i("Cloud request=" + request);
Log.i("Cloud request length=" + request.length());
URL url = new URL(BuildConfig.CLOUD_URI);
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
@@ -111,22 +161,28 @@ public class CloudSync {
}
String response = Helper.readStream(connection.getInputStream());
Log.i("Cloud response=" + response);
Log.i("Cloud response length=" + response.length());
JSONObject jresponse = new JSONObject(response);
if (jresponse.has("items")) {
JSONArray jitems = jresponse.getJSONArray("items");
for (int i = 0; i < jitems.length(); i++) {
JSONObject jitem = jitems.getJSONObject(i);
int revision = jitem.getInt("revision");
int revision = jitem.getInt("rev");
String ekey = jitem.getString("key");
jitem.put("key", transform(ekey, key.second, null, false));
String k = transform(ekey, key.second, null, false);
jitem.put("key", k);
if (jitem.has("value") && !jitem.isNull("value")) {
String evalue = jitem.getString("value");
jitem.put("value", transform(evalue, key.second, revision, false));
String v = null;
if (jitem.has("val") && !jitem.isNull("val")) {
String evalue = jitem.getString("val");
v = transform(evalue, key.second, revision, false);
jitem.put("val", v);
}
v = (v == null ? null : "#" + v.length());
Log.i("Cloud < " + k + "=" + v + " @" + revision);
}
}
@@ -166,4 +222,25 @@ public class CloudSync {
return new String(decrypted);
}
}
private static List<JSONArray> partition(JSONArray jarray) throws JSONException {
if (jarray.length() <= BATCH_SIZE)
return Arrays.asList(jarray);
int count = 0;
List<JSONArray> jpartitions = new ArrayList<>();
for (int i = 0; i < jarray.length(); i += BATCH_SIZE) {
JSONArray jpartition = new JSONArray();
for (int j = 0; j < BATCH_SIZE && i + j < jarray.length(); j++) {
count++;
jpartition.put(jarray.get(i + j));
}
jpartitions.add(jpartition);
}
if (count != jarray.length())
throw new IllegalArgumentException("Partition error size=" + count + "/" + jarray.length());
return jpartitions;
}
}