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/*
* Copyright 2016 OpenMarket 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_inbound_group_session.h"
using namespace AndroidOlmSdk;
/**
* Release the session allocation made by initializeInboundGroupSessionMemory().<br>
* This method MUST be called when java counter part account instance is done.
*
*/
JNIEXPORT void OLM_INBOUND_GROUP_SESSION_FUNC_DEF(releaseSessionJni)(JNIEnv *env, jobject thiz)
{
OlmInboundGroupSession* sessionPtr = NULL;
LOGD("## releaseSessionJni(): intbound group session");
if(NULL == (sessionPtr = (OlmInboundGroupSession*)getInboundGroupSessionInstanceId(env,thiz)))
{
LOGE("## releaseSessionJni(): failure - invalid inbound group session instance");
}
else
{
LOGD(" ## releaseSessionJni(): sessionPtr=%p",sessionPtr);
size_t retCode = olm_clear_inbound_group_session(sessionPtr);
LOGD(" ## releaseSessionJni(): clear_inbound_group_session=%lu",retCode);
LOGD(" ## releaseSessionJni(): free IN");
free(sessionPtr);
LOGD(" ## releaseSessionJni(): free OUT");
}
}
/**
* Initialize a new inbound group session and return it to JAVA side.<br>
* Since a C prt is returned as a jlong, special care will be taken
* to make the cast (OlmInboundGroupSession* => jlong) platform independent.
* @return the initialized OlmInboundGroupSession* instance if init succeed, NULL otherwise
**/
JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(initNewSessionJni)(JNIEnv *env, jobject thiz)
{
OlmInboundGroupSession* sessionPtr = NULL;
size_t sessionSize = 0;
LOGD("## initNewSessionJni(): inbound group session IN");
sessionSize = olm_inbound_group_session_size();
if(0 == sessionSize)
{
LOGE(" ## initNewSessionJni(): failure - inbound group session size = 0");
}
else if(NULL != (sessionPtr=(OlmInboundGroupSession*)malloc(sessionSize)))
{
sessionPtr = olm_inbound_group_session(sessionPtr);
LOGD(" ## initNewSessionJni(): success - inbound group session size=%lu",sessionSize);
}
else
{
LOGE(" ## initNewSessionJni(): failure - inbound group session OOM");
}
return (jlong)(intptr_t)sessionPtr;
}
/**
* Create a new in-bound session.<br>
* @param aSessionKey session key from an outbound session
* @return ERROR_CODE_OK if operation succeed, ERROR_CODE_KO otherwise
*/
JNIEXPORT jint OLM_INBOUND_GROUP_SESSION_FUNC_DEF(initInboundGroupSessionWithSessionKeyJni)(JNIEnv *env, jobject thiz, jstring aSessionKey)
{
jint retCode = ERROR_CODE_KO;
OlmInboundGroupSession *sessionPtr = NULL;
const uint8_t *sessionKeyPtr = NULL;
size_t sessionResult;
LOGD("## initInboundGroupSessionWithSessionKeyJni(): inbound group session IN");
if(NULL == (sessionPtr = (OlmInboundGroupSession*)getInboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## initInboundGroupSessionWithSessionKeyJni(): failure - invalid inbound group session instance");
}
else if(0 == aSessionKey)
{
LOGE(" ## initInboundGroupSessionWithSessionKeyJni(): failure - invalid aSessionKey");
}
else if(NULL == (sessionKeyPtr = (const uint8_t *)env->GetStringUTFChars(aSessionKey, 0)))
{
LOGE(" ## initInboundSessionFromIdKeyJni(): failure - session key JNI allocation OOM");
}
else
{
size_t sessionKeyLength = (size_t)env->GetStringUTFLength(aSessionKey);
LOGD(" ## initInboundSessionFromIdKeyJni(): sessionKeyLength=%lu",sessionKeyLength);
sessionResult = olm_init_inbound_group_session(sessionPtr, sessionKeyPtr, sessionKeyLength);
if(sessionResult == olm_error()) {
const char *errorMsgPtr = olm_inbound_group_session_last_error(sessionPtr);
LOGE(" ## initInboundSessionFromIdKeyJni(): failure - init inbound session creation Msg=%s",errorMsgPtr);
}
else
{
retCode = ERROR_CODE_OK;
LOGD(" ## initInboundSessionFromIdKeyJni(): success - result=%lu", sessionResult);
}
}
// free local alloc
if(NULL!= sessionKeyPtr)
{
env->ReleaseStringUTFChars(aSessionKey, (const char*)sessionKeyPtr);
}
return retCode;
}
/**
* Get a base64-encoded identifier for this inbound group session.
*/
JNIEXPORT jstring OLM_INBOUND_GROUP_SESSION_FUNC_DEF(sessionIdentifierJni)(JNIEnv *env, jobject thiz)
{
OlmInboundGroupSession *sessionPtr = NULL;
uint8_t *sessionIdPtr = NULL;
jstring returnValueStr=0;
LOGD("## sessionIdentifierJni(): inbound group session IN");
if(NULL == (sessionPtr = (OlmInboundGroupSession*)getInboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## sessionIdentifierJni(): failure - invalid inbound group session instance");
}
else
{
// get the size to alloc
size_t lengthSessionId = olm_inbound_group_session_id_length(sessionPtr);
LOGD(" ## sessionIdentifierJni(): inbound group session lengthSessionId=%lu",lengthSessionId);
if(NULL == (sessionIdPtr = (uint8_t*)malloc((lengthSessionId+1)*sizeof(uint8_t))))
{
LOGE(" ## sessionIdentifierJni(): failure - inbound group session identifier allocation OOM");
}
else
{
size_t result = olm_inbound_group_session_id(sessionPtr, sessionIdPtr, lengthSessionId);
if (result == olm_error())
{
const char *errorMsgPtr = olm_inbound_group_session_last_error(sessionPtr);
LOGE(" ## sessionIdentifierJni(): failure - get inbound group session identifier failure Msg=%s",errorMsgPtr);
}
else
{
// update length
sessionIdPtr[result] = static_cast<char>('\0');
LOGD(" ## sessionIdentifierJni(): success - inbound group session result=%lu sessionId=%s",result, (char*)sessionIdPtr);
returnValueStr = env->NewStringUTF((const char*)sessionIdPtr);
}
free(sessionIdPtr);
}
}
return returnValueStr;
}
JNIEXPORT jstring OLM_INBOUND_GROUP_SESSION_FUNC_DEF(decryptMessageJni)(JNIEnv *env, jobject thiz, jstring aEncryptedMsg)
{
jstring decryptedMsgRetValue = 0;
OlmInboundGroupSession *sessionPtr = NULL;
const char *encryptedMsgPtr = NULL;
uint8_t *plainTextMsgPtr = NULL;
uint8_t *tempEncryptedPtr = NULL;
LOGD("## decryptMessageJni(): inbound group session IN");
if(NULL == (sessionPtr = (OlmInboundGroupSession*)getInboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## decryptMessageJni(): failure - invalid inbound group session ptr=NULL");
}
else if(0 == aEncryptedMsg)
{
LOGE(" ## decryptMessageJni(): failure - invalid encrypted message");
}
else if(0 == (encryptedMsgPtr = env->GetStringUTFChars(aEncryptedMsg, 0)))
{
LOGE(" ## decryptMessageJni(): failure - encrypted message JNI allocation OOM");
}
else
{
// get encrypted message length
size_t encryptedMsgLength = (size_t)env->GetStringUTFLength(aEncryptedMsg);
// create a dedicated temp buffer to be used in next Olm API calls
if(NULL == (tempEncryptedPtr = static_cast<uint8_t*>(malloc(encryptedMsgLength*sizeof(uint8_t)))))
{
LOGE(" ## decryptMessageJni(): failure - tempEncryptedPtr allocation OOM");
}
else
{
memcpy(tempEncryptedPtr, encryptedMsgPtr, encryptedMsgLength);
LOGD(" ## decryptMessageJni(): encryptedMsgLength=%lu encryptedMsg=%s",encryptedMsgLength,encryptedMsgPtr);
// get max plaintext length
size_t maxPlainTextLength = olm_group_decrypt_max_plaintext_length(sessionPtr,
tempEncryptedPtr,
encryptedMsgLength);
if(maxPlainTextLength == olm_error())
{
const char *errorMsgPtr = olm_inbound_group_session_last_error(sessionPtr);
LOGE(" ## decryptMessageJni(): failure - olm_group_decrypt_max_plaintext_length Msg=%s",errorMsgPtr);
}
else
{
LOGD(" ## decryptMessageJni(): maxPlaintextLength=%lu",maxPlainTextLength);
// allocate output decrypted message
plainTextMsgPtr = static_cast<uint8_t*>(malloc((maxPlainTextLength+1)*sizeof(uint8_t)));
// decrypt, but before reload encrypted buffer (previous one was destroyed)
memcpy(tempEncryptedPtr, encryptedMsgPtr, encryptedMsgLength);
size_t plaintextLength = olm_group_decrypt(sessionPtr,
tempEncryptedPtr,
encryptedMsgLength,
plainTextMsgPtr,
maxPlainTextLength);
if(plaintextLength == olm_error())
{
const char *errorMsgPtr = olm_inbound_group_session_last_error(sessionPtr);
LOGE(" ## decryptMessageJni(): failure - olm_group_decrypt Msg=%s",errorMsgPtr);
}
else
{
// update decrypted buffer size
plainTextMsgPtr[plaintextLength] = static_cast<char>('\0');
LOGD(" ## decryptMessageJni(): decrypted returnedLg=%lu plainTextMsgPtr=%s",plaintextLength, (char*)plainTextMsgPtr);
decryptedMsgRetValue = env->NewStringUTF((const char*)plainTextMsgPtr);
}
}
}
}
// free alloc
if(NULL != encryptedMsgPtr)
{
env->ReleaseStringUTFChars(aEncryptedMsg, encryptedMsgPtr);
}
if(NULL != tempEncryptedPtr)
{
free(tempEncryptedPtr);
}
if(NULL != plainTextMsgPtr)
{
free(plainTextMsgPtr);
}
return decryptedMsgRetValue;
}
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