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Add synchronized access to cache

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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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5
src/org/thoughtcrime/securesms/crypto/MessageDisplayHelper.java
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@ -34,6 +34,7 @@ public class MessageDisplayHelper {
}; };
private static String checkCacheForBody(String body) { private static String checkCacheForBody(String body) {
synchronized (decryptedBodyCache) {
if (decryptedBodyCache.containsKey(body)) { if (decryptedBodyCache.containsKey(body)) {
String decryptedBody = decryptedBodyCache.get(body).get(); String decryptedBody = decryptedBodyCache.get(body).get();
if (decryptedBody != null) { if (decryptedBody != null) {
@ -46,6 +47,7 @@ public class MessageDisplayHelper {
return null; return null;
} }
}
public static String getDecryptedMessageBody(MasterCipher bodyCipher, String body) throws InvalidMessageException { public static String getDecryptedMessageBody(MasterCipher bodyCipher, String body) throws InvalidMessageException {
if (body.startsWith(Prefix.SYMMETRIC_ENCRYPT)) { if (body.startsWith(Prefix.SYMMETRIC_ENCRYPT)) {
@ -55,7 +57,10 @@ public class MessageDisplayHelper {
return cacheResult; return cacheResult;
String decryptedBody = bodyCipher.decryptBody(body.substring(Prefix.SYMMETRIC_ENCRYPT.length())); String decryptedBody = bodyCipher.decryptBody(body.substring(Prefix.SYMMETRIC_ENCRYPT.length()));
synchronized (decryptedBodyCache) {
decryptedBodyCache.put(body, new SoftReference<String>(decryptedBody)); decryptedBodyCache.put(body, new SoftReference<String>(decryptedBody));
}
return decryptedBody; return decryptedBody;
} }