From 99ff3d15c81b20bc1f4cfd62c33137db8c6e8044 Mon Sep 17 00:00:00 2001
From: ylecollen <ylecollen@amdocs.com>
Date: Mon, 9 Jan 2017 15:03:15 +0100
Subject: [PATCH] remove the useless malloc(len+1) + zero terminated
---
.../main/java/org/matrix/olm/OlmSession.java | 6 +--
.../olm-sdk/src/main/jni/olm_account.cpp | 15 ++-----
.../main/jni/olm_inbound_group_session.cpp | 12 +++---
.../main/jni/olm_outbound_group_session.cpp | 26 ++++---------
.../olm-sdk/src/main/jni/olm_session.cpp | 39 +++++++------------
.../olm-sdk/src/main/jni/olm_session.h | 2 +-
6 files changed, 34 insertions(+), 66 deletions(-)
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
index 2436f0d..170b1a5 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
@@ -262,7 +262,7 @@ public class OlmSession extends CommonSerializeUtils implements Serializable {
OlmMessage encryptedMsgRetValue = new OlmMessage();
try {
- encryptMessageJni(aClearMsg.getBytes("UTF-8"), encryptedMsgRetValue);
+ encryptedMsgRetValue.mCipherText = new String(encryptMessageJni(aClearMsg.getBytes("UTF-8"), encryptedMsgRetValue), "UTF-8");
} catch (Exception e) {
Log.e(LOG_TAG, "## encryptMessage(): failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_SESSION_ENCRYPT_MESSAGE, e.getMessage());
@@ -271,7 +271,7 @@ public class OlmSession extends CommonSerializeUtils implements Serializable {
return encryptedMsgRetValue;
}
- private native void encryptMessageJni(byte[] aClearMsg, OlmMessage aEncryptedMsg);
+ private native byte[] encryptMessageJni(byte[] aClearMsg, OlmMessage aEncryptedMsg);
/**
* Decrypt a message using the session.<br>
@@ -314,7 +314,7 @@ public class OlmSession extends CommonSerializeUtils implements Serializable {
* @throws IOException exception
* @throws ClassNotFoundException exception
*/
- private void readObject(ObjectInputStream aInStream) throws Exception {
+ private void readObject(ObjectInputStream aInStream) throws Exception {
deserialize(aInStream);
}
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp
index 4da0d67..30828d9 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp
@@ -462,8 +462,7 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(signMessageJni)(JNIEnv *env, jobject t
// signature memory allocation
size_t signatureLength = olm_account_signature_length(accountPtr);
- size_t bufferLen = signatureLength + 1;
- void* signedMsgPtr = malloc(bufferLen * sizeof(uint8_t));
+ void* signedMsgPtr = malloc(signatureLength * sizeof(uint8_t));
if (!signedMsgPtr)
{
@@ -486,14 +485,10 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(signMessageJni)(JNIEnv *env, jobject t
}
else
{
- // info: signatureLength is always equal to resultSign
- (static_cast<char*>(signedMsgPtr))[signatureLength] = static_cast<char>('\0');
-
LOGD("## signMessageJni(): success - retCode=%lu signatureLength=%lu", static_cast<long unsigned int>(resultSign), static_cast<long unsigned int>(signatureLength));
signedMsgRetValueBuffer = env->NewByteArray(signatureLength);
env->SetByteArrayRegion(signedMsgRetValueBuffer, 0 , signatureLength, (jbyte*)signedMsgPtr);
-
}
free(signedMsgPtr);
@@ -549,7 +544,7 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
size_t keyLength = (size_t)env->GetArrayLength(aKeyBuffer);
LOGD(" ## serializeJni(): pickledLength=%lu keyLength=%lu",static_cast<long unsigned int>(pickledLength), static_cast<long unsigned int>(keyLength));
- void *pickledPtr = malloc((pickledLength+1)*sizeof(uint8_t));
+ void *pickledPtr = malloc(pickledLength*sizeof(uint8_t));
if (!pickledPtr)
{
@@ -570,11 +565,7 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
}
else
{
- // build success output
- (static_cast<char*>(pickledPtr))[pickledLength] = static_cast<char>('\0');
-
- LOGD(" ## serializeJni(): success - result=%lu pickled=%s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
-
+ LOGD(" ## serializeJni(): success - result=%lu pickled starts with = %10s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
pickledDataRetValue = env->NewByteArray(pickledLength);
env->SetByteArrayRegion(pickledDataRetValue, 0 , pickledLength, (jbyte*)pickledPtr);
}
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_inbound_group_session.cpp b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_inbound_group_session.cpp
index 7dd250b..2e6e4af 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_inbound_group_session.cpp
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_inbound_group_session.cpp
@@ -167,7 +167,7 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(sessionIdentifierJni)(JN
size_t lengthSessionId = olm_inbound_group_session_id_length(sessionPtr);
LOGD(" ## sessionIdentifierJni(): inbound group session lengthSessionId=%lu",static_cast<long unsigned int>(lengthSessionId));
- uint8_t *sessionIdPtr = (uint8_t*)malloc((lengthSessionId+1)*sizeof(uint8_t));
+ uint8_t *sessionIdPtr = (uint8_t*)malloc(lengthSessionId*sizeof(uint8_t));
if (!sessionIdPtr)
{
@@ -185,8 +185,7 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(sessionIdentifierJni)(JN
}
else
{
- sessionIdPtr[result] = static_cast<char>('\0');
- LOGD(" ## sessionIdentifierJni(): success - inbound group session result=%lu sessionId=%s",static_cast<long unsigned int>(result), (char*)sessionIdPtr);
+ LOGD(" ## sessionIdentifierJni(): success - inbound group session result=%lu sessionId starts with =%10s",static_cast<long unsigned int>(result), (char*)sessionIdPtr);
returnValue = env->NewByteArray(result);
env->SetByteArrayRegion(returnValue, 0 , result, (jbyte*)sessionIdPtr);
@@ -280,7 +279,7 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(decryptMessageJni)(JNIEn
uint32_t messageIndex = 0;
// allocate output decrypted message
- uint8_t *plainTextMsgPtr = static_cast<uint8_t*>(malloc((maxPlainTextLength+1)*sizeof(uint8_t)));
+ uint8_t *plainTextMsgPtr = static_cast<uint8_t*>(malloc(maxPlainTextLength*sizeof(uint8_t)));
// decrypt, but before reload encrypted buffer (previous one was destroyed)
memcpy(tempEncryptedPtr, encryptedMsgPtr, encryptedMsgLength);
@@ -370,7 +369,7 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *en
size_t keyLength = (size_t)env->GetArrayLength(aKeyBuffer);
LOGD(" ## serializeJni(): pickledLength=%lu keyLength=%lu", static_cast<long unsigned int>(pickledLength), static_cast<long unsigned int>(keyLength));
- void *pickledPtr = malloc((pickledLength+1)*sizeof(uint8_t));
+ void *pickledPtr = malloc(pickledLength*sizeof(uint8_t));
if (!pickledPtr)
{
@@ -391,8 +390,7 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *en
}
else
{
- (static_cast<char*>(pickledPtr))[pickledLength] = static_cast<char>('\0');
- LOGD(" ## serializeJni(): success - result=%lu pickled=%s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
+ LOGD(" ## serializeJni(): success - result=%lu pickled starts with %10s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
pickledDataRet = env->NewByteArray(pickledLength);
env->SetByteArrayRegion(pickledDataRet, 0 , pickledLength, (jbyte*)pickledPtr);
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp
index bfe5a4e..827e8fd 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp
@@ -161,7 +161,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(sessionIdentifierJni)(J
size_t lengthSessionId = olm_outbound_group_session_id_length(sessionPtr);
LOGD(" ## sessionIdentifierJni(): outbound group session lengthSessionId=%lu",static_cast<long unsigned int>(lengthSessionId));
- uint8_t *sessionIdPtr = (uint8_t*)malloc((lengthSessionId+1)*sizeof(uint8_t));
+ uint8_t *sessionIdPtr = (uint8_t*)malloc(lengthSessionId*sizeof(uint8_t));
if (!sessionIdPtr)
{
@@ -179,13 +179,10 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(sessionIdentifierJni)(J
}
else
{
- // update length
- sessionIdPtr[result] = static_cast<char>('\0');
-
returnValue = env->NewByteArray(result);
env->SetByteArrayRegion(returnValue, 0 , result, (jbyte*)sessionIdPtr);
- LOGD(" ## sessionIdentifierJni(): success - outbound group session identifier result=%lu sessionId=%s",static_cast<long unsigned int>(result), reinterpret_cast<char*>(sessionIdPtr));
+ LOGD(" ## sessionIdentifierJni(): success - outbound group session identifier result=%lu sessionId starts with %10s",static_cast<long unsigned int>(result), reinterpret_cast<char*>(sessionIdPtr));
}
// free alloc
@@ -251,7 +248,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(sessionKeyJni)(JNIEnv *
size_t sessionKeyLength = olm_outbound_group_session_key_length(sessionPtr);
LOGD(" ## sessionKeyJni(): sessionKeyLength=%lu",static_cast<long unsigned int>(sessionKeyLength));
- uint8_t *sessionKeyPtr = (uint8_t*)malloc((sessionKeyLength+1)*sizeof(uint8_t));
+ uint8_t *sessionKeyPtr = (uint8_t*)malloc(sessionKeyLength*sizeof(uint8_t));
if (!sessionKeyPtr)
{
@@ -269,9 +266,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(sessionKeyJni)(JNIEnv *
}
else
{
- // update length
- sessionKeyPtr[result] = static_cast<char>('\0');
- LOGD(" ## sessionKeyJni(): success - outbound group session key result=%lu sessionKey=%s",static_cast<long unsigned int>(result), reinterpret_cast<char*>(sessionKeyPtr));
+ LOGD(" ## sessionKeyJni(): success - outbound group session key result=%lu sessionKey starts with %10s",static_cast<long unsigned int>(result), reinterpret_cast<char*>(sessionKeyPtr));
returnValue = env->NewByteArray(result);
env->SetByteArrayRegion(returnValue, 0 , result, (jbyte*)sessionKeyPtr);
@@ -323,7 +318,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(encryptMessageJni)(JNIE
// compute max encrypted length
size_t encryptedMsgLength = olm_group_encrypt_message_length(sessionPtr,clearMsgLength);
- uint8_t *encryptedMsgPtr = (uint8_t*)malloc((encryptedMsgLength+1)*sizeof(uint8_t));
+ uint8_t *encryptedMsgPtr = (uint8_t*)malloc(encryptedMsgLength*sizeof(uint8_t));
if (!encryptedMsgPtr)
{
@@ -348,10 +343,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(encryptMessageJni)(JNIE
}
else
{
- // update decrypted buffer size
- encryptedMsgPtr[encryptedLength] = static_cast<char>('\0');
-
- LOGD(" ## encryptMessageJni(): encrypted returnedLg=%lu plainTextMsgPtr=%s",static_cast<long unsigned int>(encryptedLength), reinterpret_cast<char*>(encryptedMsgPtr));
+ LOGD(" ## encryptMessageJni(): encrypted returnedLg=%lu plainTextMsgPtr=%10s",static_cast<long unsigned int>(encryptedLength), reinterpret_cast<char*>(encryptedMsgPtr));
encryptedMsgRet = env->NewByteArray(encryptedLength);
env->SetByteArrayRegion(encryptedMsgRet, 0 , encryptedLength, (jbyte*)encryptedMsgPtr);
@@ -412,7 +404,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *e
size_t keyLength = (size_t)env->GetArrayLength(aKeyBuffer);
LOGD(" ## serializeJni(): pickledLength=%lu keyLength=%lu",static_cast<long unsigned int>(pickledLength), static_cast<long unsigned int>(keyLength));
- void *pickledPtr = malloc((pickledLength+1)*sizeof(uint8_t));
+ void *pickledPtr = malloc(pickledLength*sizeof(uint8_t));
if(!pickledPtr)
{
@@ -433,9 +425,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *e
}
else
{
- // build success output
- (static_cast<char*>(pickledPtr))[pickledLength] = static_cast<char>('\0');
- LOGD(" ## serializeJni(): success - result=%lu pickled=%s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
+ LOGD(" ## serializeJni(): success - result=%lu pickled starts with %10s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
returnValue = env->NewByteArray(pickledLength);
env->SetByteArrayRegion(returnValue, 0 , pickledLength, (jbyte*)pickledPtr);
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp
index 6e26071..d6ede41 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp
@@ -461,15 +461,16 @@ JNIEXPORT jint JNICALL OLM_SESSION_FUNC_DEF(matchesInboundSessionFromIdKeyJni)(J
* Encrypt a message using the session.<br>
* @param aClearMsg clear text message
* @param [out] aEncryptedMsg ciphered message
+ * @return the encrypted message
*/
-JNIEXPORT void OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz, jbyteArray aClearMsgBuffer, jobject aEncryptedMsg)
+JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz, jbyteArray aClearMsgBuffer, jobject aEncryptedMsg)
{
+ jbyteArray encryptedMsgRet = 0;
const char* errorMessage = NULL;
OlmSession *sessionPtr = getSessionInstanceId(env, thiz);
jbyte *clearMsgPtr = NULL;
jclass encryptedMsgJClass = 0;
- jfieldID encryptedMsgFieldId;
jfieldID typeMsgFieldId;
LOGD("## encryptMessageJni(): IN ");
@@ -498,11 +499,6 @@ JNIEXPORT void OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz
LOGE("## encryptMessageJni(): failure - unable to get crypted message class");
errorMessage = "unable to get crypted message class";
}
- else if (!(encryptedMsgFieldId = env->GetFieldID(encryptedMsgJClass,"mCipherText","Ljava/lang/String;")))
- {
- LOGE("## encryptMessageJni(): failure - unable to get message field");
- errorMessage = "unable to get message field";
- }
else if (!(typeMsgFieldId = env->GetFieldID(encryptedMsgJClass,"mType","J")))
{
LOGE("## encryptMessageJni(): failure - unable to get message type field");
@@ -532,7 +528,7 @@ JNIEXPORT void OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz
size_t clearMsgLength = (size_t)env->GetArrayLength(aClearMsgBuffer);
size_t encryptedMsgLength = olm_encrypt_message_length(sessionPtr, clearMsgLength);
- void *encryptedMsgPtr = malloc((encryptedMsgLength+1)*sizeof(uint8_t));
+ void *encryptedMsgPtr = malloc(encryptedMsgLength*sizeof(uint8_t));
if (!encryptedMsgPtr)
{
@@ -562,17 +558,13 @@ JNIEXPORT void OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz
}
else
{
- // update encrypted buffer size
- (static_cast<char*>(encryptedMsgPtr))[result] = static_cast<char>('\0');
-
// update message type: PRE KEY or normal
env->SetLongField(aEncryptedMsg, typeMsgFieldId, (jlong)messageType);
- // update message: encryptedMsgPtr => encryptedJstring
- jstring encryptedJstring = env->NewStringUTF((const char*)encryptedMsgPtr);
- env->SetObjectField(aEncryptedMsg, encryptedMsgFieldId, (jobject)encryptedJstring);
+ encryptedMsgRet = env->NewByteArray(encryptedMsgLength);
+ env->SetByteArrayRegion(encryptedMsgRet, 0 , encryptedMsgLength, (jbyte*)encryptedMsgPtr);
- LOGD("## encryptMessageJni(): success - result=%lu Type=%lu utfLength=%lu encryptedMsg=%s", static_cast<long unsigned int>(result), static_cast<long unsigned int>(messageType), static_cast<long unsigned int>((size_t)env->GetStringUTFLength(encryptedJstring)), (const char*)encryptedMsgPtr);
+ LOGD("## encryptMessageJni(): success - result=%lu Type=%lu utfLength=%lu encryptedMsg starts with %10s", static_cast<long unsigned int>(result), static_cast<long unsigned int>(messageType), static_cast<long unsigned int>((size_t)env->GetStringUTFLength(encryptedJstring)), (const char*)encryptedMsgPtr);
}
free(encryptedMsgPtr);
@@ -592,6 +584,8 @@ JNIEXPORT void OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz
{
env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
}
+
+ return encryptedMsgRet;
}
/**
@@ -682,7 +676,7 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(decryptMessageJni)(JNIEnv *env, jobjec
LOGD("## decryptMessageJni(): maxPlaintextLength=%lu",static_cast<long unsigned int>(maxPlainTextLength));
// allocate output decrypted message
- plainTextMsgPtr = static_cast<uint8_t*>(malloc((maxPlainTextLength+1)*sizeof(uint8_t)));
+ plainTextMsgPtr = static_cast<uint8_t*>(malloc(maxPlainTextLength*sizeof(uint8_t)));
// decrypt, but before reload encrypted buffer (previous one was destroyed)
memcpy(tempEncryptedPtr, encryptedMsgPtr, encryptedMsgLength);
@@ -756,7 +750,7 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(getSessionIdentifierJni)(JNIEnv *env,
size_t lengthSessionId = olm_session_id_length(sessionPtr);
LOGD("## getSessionIdentifierJni(): lengthSessionId=%lu",static_cast<long unsigned int>(lengthSessionId));
- void *sessionIdPtr = malloc((lengthSessionId+1)*sizeof(uint8_t));
+ void *sessionIdPtr = malloc(lengthSessionId*sizeof(uint8_t));
if (!sessionIdPtr)
{
@@ -774,10 +768,7 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(getSessionIdentifierJni)(JNIEnv *env,
}
else
{
- // update length
- (static_cast<char*>(sessionIdPtr))[result] = static_cast<char>('\0');
-
- LOGD("## getSessionIdentifierJni(): success - result=%lu sessionId=%s",static_cast<long unsigned int>(result), (char*)sessionIdPtr);
+ LOGD("## getSessionIdentifierJni(): success - result=%lu sessionId= starts with %10s",static_cast<long unsigned int>(result), (char*)sessionIdPtr);
returnValue = env->NewByteArray(result);
env->SetByteArrayRegion(returnValue, 0 , result, (jbyte*)sessionIdPtr);
@@ -832,7 +823,7 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
size_t keyLength = (size_t)env->GetArrayLength(aKeyBuffer);
LOGD(" ## serializeJni(): pickledLength=%lu keyLength=%lu",static_cast<long unsigned int>(pickledLength), static_cast<long unsigned int>(keyLength));
- void *pickledPtr = malloc((pickledLength+1)*sizeof(uint8_t));
+ void *pickledPtr = malloc(pickledLength*sizeof(uint8_t));
if (!pickledPtr)
{
@@ -853,9 +844,7 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
}
else
{
- // build success output
- (static_cast<char*>(pickledPtr))[pickledLength] = static_cast<char>('\0');
- LOGD(" ## serializeJni(): success - result=%lu pickled=%s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
+ LOGD(" ## serializeJni(): success - result=%lu pickled starts with %s", static_cast<long unsigned int>(result), static_cast<char*>(pickledPtr));
returnValue = env->NewByteArray(pickledLength);
env->SetByteArrayRegion(returnValue, 0 , pickledLength, (jbyte*)pickledPtr);
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.h b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.h
index 76f59c5..01cf96c 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.h
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.h
@@ -43,7 +43,7 @@ JNIEXPORT jint OLM_SESSION_FUNC_DEF(matchesInboundSessionJni)(JNIEnv *env, jobje
JNIEXPORT jint OLM_SESSION_FUNC_DEF(matchesInboundSessionFromIdKeyJni)(JNIEnv *env, jobject thiz, jbyteArray aTheirIdentityKey, jbyteArray aOneTimeKeyMsg);
// encrypt/decrypt
-JNIEXPORT void OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz, jbyteArray aClearMsg, jobject aEncryptedMsg);
+JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz, jbyteArray aClearMsg, jobject aEncryptedMsg);
JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(decryptMessageJni)(JNIEnv *env, jobject thiz, jobject aEncryptedMsg);
JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(getSessionIdentifierJni)(JNIEnv *env, jobject thiz);
--
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