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Add synchronized access to cache

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This commit is contained in:
Moxie Marlinspike 2013-03-03 18:49:39 -08:00
parent ef6a5c69af
commit 6230abb524
1 changed files with 16 additions and 11 deletions
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27
src/org/thoughtcrime/securesms/crypto/MessageDisplayHelper.java
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@ -34,17 +34,19 @@ public class MessageDisplayHelper {
};
private static String checkCacheForBody(String body) {
if (decryptedBodyCache.containsKey(body)) {
String decryptedBody = decryptedBodyCache.get(body).get();
if (decryptedBody != null) {
return decryptedBody;
} else {
decryptedBodyCache.remove(body);
return null;
synchronized (decryptedBodyCache) {
if (decryptedBodyCache.containsKey(body)) {
String decryptedBody = decryptedBodyCache.get(body).get();
if (decryptedBody != null) {
return decryptedBody;
} else {
decryptedBodyCache.remove(body);
return null;
}
}
}
return null;
return null;
}
}
public static String getDecryptedMessageBody(MasterCipher bodyCipher, String body) throws InvalidMessageException {
@ -55,11 +57,14 @@ public class MessageDisplayHelper {
return cacheResult;
String decryptedBody = bodyCipher.decryptBody(body.substring(Prefix.SYMMETRIC_ENCRYPT.length()));
decryptedBodyCache.put(body, new SoftReference<String>(decryptedBody));
synchronized (decryptedBodyCache) {
decryptedBodyCache.put(body, new SoftReference<String>(decryptedBody));
}
return decryptedBody;
}
return body;
}
}
}