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/*
* Copyright 2016 OpenMarket Ltd
* Copyright 2016 Vector Creations Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "olm_jni_helper.h"
#include "olm/olm.h"
#include <sys/time.h>
using namespace AndroidOlmSdk;
/**
* Init a buffer with a given number of random values.
* @param aBuffer2Ptr the buffer to be initialized
* @param aRandomSize the number of random values to apply
* @return true if operation succeed, false otherwise
**/
bool setRandomInBuffer(JNIEnv *env, uint8_t **aBuffer2Ptr, size_t aRandomSize)
{
bool retCode = false;
int bufferLen = aRandomSize*sizeof(uint8_t);
if (!aBuffer2Ptr)
{
LOGE("## setRandomInBuffer(): failure - aBuffer=NULL");
}
else if (!aRandomSize)
{
LOGE("## setRandomInBuffer(): failure - random size=0");
}
else if (!(*aBuffer2Ptr = (uint8_t*)malloc(bufferLen)))
{
LOGE("## setRandomInBuffer(): failure - alloc mem OOM");
}
else
{
LOGD("## setRandomInBuffer(): randomSize=%lu",static_cast<long unsigned int>(aRandomSize));
// use the secureRandom class
jclass cls = env->FindClass("java/security/SecureRandom");
if (cls)
{
jobject newObj = 0;
jmethodID constructor = env->GetMethodID(cls, "<init>", "()V");
jmethodID nextByteMethod = env->GetMethodID(cls, "nextBytes", "([B)V");
if (constructor)
{
newObj = env->NewObject(cls, constructor);
jbyteArray tempByteArray = env->NewByteArray(bufferLen);
if (newObj && tempByteArray && !env->ExceptionOccurred())
{
env->CallVoidMethod(newObj, nextByteMethod, tempByteArray);
jbyte* buffer = env->GetByteArrayElements(tempByteArray, NULL);
if (buffer)
{
memcpy(*aBuffer2Ptr, buffer, bufferLen);
retCode = true;
// clear tempByteArray to hide sensitive data.
memset(buffer, 0, bufferLen);
env->SetByteArrayRegion(tempByteArray, 0, bufferLen, buffer);
// ensure that the buffer is released
env->ReleaseByteArrayElements(tempByteArray, buffer, JNI_ABORT);
}
}
if (tempByteArray)
{
env->DeleteLocalRef(tempByteArray);
}
if (newObj)
{
env->DeleteLocalRef(newObj);
}
}
}
// debug purpose
/*for(int i = 0; i < aRandomSize; i++)
{
LOGD("## setRandomInBuffer(): randomBuffPtr[%ld]=%d",i, (*aBuffer2Ptr)[i]);
}*/
}
return retCode;
}
/**
* Read the instance ID of the calling object.
* @param aJniEnv pointer pointing on the JNI function table
* @param aJavaObject reference to the object on which the method is invoked
* @param aCallingClass java calling clas name
* @return the instance ID if operation succeed, -1 if instance ID was not found.
**/
jlong getInstanceId(JNIEnv* aJniEnv, jobject aJavaObject, const char *aCallingClass)
{
jlong instanceId = 0;
if (aJniEnv)
{
jclass requiredClass = aJniEnv->FindClass(aCallingClass);
jclass loaderClass = 0;
if (requiredClass && (JNI_TRUE != aJniEnv->IsInstanceOf(aJavaObject, requiredClass)))
{
LOGE("## getAccountInstanceId() failure - invalid instance of");
}
else if (loaderClass = aJniEnv->GetObjectClass(aJavaObject))
{
jfieldID instanceIdField = aJniEnv->GetFieldID(loaderClass, "mNativeId", "J");
if (instanceIdField)
{
instanceId = aJniEnv->GetLongField(aJavaObject, instanceIdField);
LOGD("## getInstanceId(): read from java instanceId=%lld",instanceId);
}
else
{
LOGE("## getInstanceId() ERROR! GetFieldID=null");
}
aJniEnv->DeleteLocalRef(loaderClass);
}
else
{
LOGE("## getInstanceId() ERROR! GetObjectClass=null");
}
}
else
{
LOGE("## getInstanceId() ERROR! aJniEnv=NULL");
}
LOGD("## getInstanceId() success - instanceId=%p (jlong)(intptr_t)instanceId=%lld",(void*)instanceId, (jlong)(intptr_t)instanceId);
return instanceId;
}
/**
* Read the account instance ID of the calling object.
* @param aJniEnv pointer pointing on the JNI function table
* @param aJavaObject reference to the object on which the method is invoked
* @return the instance ID if operation succeed, -1 if instance ID was not found.
**/
jlong getAccountInstanceId(JNIEnv* aJniEnv, jobject aJavaObject)
{
jlong instanceId = getInstanceId(aJniEnv, aJavaObject, CLASS_OLM_ACCOUNT);
return instanceId;
}
/**
* Read the session instance ID of the calling object (aJavaObject).<br>
* @param aJniEnv pointer pointing on the JNI function table
* @param aJavaObject reference to the object on which the method is invoked
* @return the instance ID if read succeed, -1 otherwise.
**/
jlong getSessionInstanceId(JNIEnv* aJniEnv, jobject aJavaObject)
{
jlong instanceId = getInstanceId(aJniEnv, aJavaObject, CLASS_OLM_SESSION);
return instanceId;
}
/**
* Read the inbound group session instance ID of the calling object (aJavaObject).<br>
* @param aJniEnv pointer pointing on the JNI function table
* @param aJavaObject reference to the object on which the method is invoked
* @return the instance ID if read succeed, -1 otherwise.
**/
jlong getInboundGroupSessionInstanceId(JNIEnv* aJniEnv, jobject aJavaObject)
{
jlong instanceId = getInstanceId(aJniEnv, aJavaObject, CLASS_OLM_INBOUND_GROUP_SESSION);
return instanceId;
}
/**
* Read the outbound group session instance ID of the calling object (aJavaObject).<br>
* @param aJniEnv pointer pointing on the JNI function table
* @param aJavaObject reference to the object on which the method is invoked
* @return the instance ID if read succeed, -1 otherwise.
**/
jlong getOutboundGroupSessionInstanceId(JNIEnv* aJniEnv, jobject aJavaObject)
{
jlong instanceId = getInstanceId(aJniEnv, aJavaObject, CLASS_OLM_OUTBOUND_GROUP_SESSION);
return instanceId;
}
/**
* Read the utility instance ID of the calling object (aJavaObject).<br>
* @param aJniEnv pointer pointing on the JNI function table
* @param aJavaObject reference to the object on which the method is invoked
* @return the instance ID if read succeed, -1 otherwise.
**/
jlong getUtilityInstanceId(JNIEnv* aJniEnv, jobject aJavaObject)
{
jlong instanceId = getInstanceId(aJniEnv, aJavaObject, CLASS_OLM_UTILITY);
return instanceId;
}
/**
* Convert a C string into a UTF-8 format string.
* The conversion is performed in JAVA side to workaround the issue in NewStringUTF().
* The problem is described here: https://github.com/eclipsesource/J2V8/issues/142
*/
jstring javaCStringToUtf8(JNIEnv *env, uint8_t *aCStringMsgPtr, size_t aMsgLength)
{
jstring convertedRetValue = 0;
jbyteArray tempByteArray = NULL;
if (!aCStringMsgPtr || !env)
{
LOGE("## javaCStringToUtf8(): failure - invalid parameters (null)");
}
else if (!(tempByteArray = env->NewByteArray(aMsgLength)))
{
LOGE("## javaCStringToUtf8(): failure - return byte array OOM");
}
else
{
env->SetByteArrayRegion(tempByteArray, 0, aMsgLength, (const jbyte*)aCStringMsgPtr);
// UTF-8 conversion from JAVA
jstring strEncode = (env)->NewStringUTF("UTF-8");
jclass jClass = env->FindClass("java/lang/String");
jmethodID cstor = env->GetMethodID(jClass, "<init>", "([BLjava/lang/String;)V");
if (jClass && strEncode)
{
convertedRetValue = (jstring) env->NewObject(jClass, cstor, tempByteArray, strEncode);
LOGD(" ## javaCStringToUtf8(): succeed");
env->DeleteLocalRef(tempByteArray);
}
else
{
LOGE(" ## javaCStringToUtf8(): failure - invalid Java references");
}
}
return convertedRetValue;
}
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