/*
* 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_outbound_group_session.h"
using namespace AndroidOlmSdk;
/**
* Release the session allocation made by initializeOutboundGroupSessionMemory().
* This method MUST be called when java counter part account instance is done.
*
*/
JNIEXPORT void OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(releaseSessionJni)(JNIEnv *env, jobject thiz)
{
OlmOutboundGroupSession* sessionPtr = NULL;
LOGD("## releaseSessionJni(): outbound group session");
if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## releaseSessionJni(): failure - invalid outbound group session instance");
}
else
{
LOGD(" ## releaseSessionJni(): sessionPtr=%p",sessionPtr);
size_t retCode = olm_clear_outbound_group_session(sessionPtr);
LOGD(" ## releaseSessionJni(): clear_outbound_group_session=%lu",retCode);
LOGD(" ## releaseSessionJni(): free IN");
free(sessionPtr);
LOGD(" ## releaseSessionJni(): free OUT");
}
}
/**
* Initialize a new outbound group session and return it to JAVA side.
* Since a C prt is returned as a jlong, special care will be taken
* to make the cast (OlmOutboundGroupSession* => jlong) platform independent.
* @return the initialized OlmOutboundGroupSession* instance if init succeed, NULL otherwise
**/
JNIEXPORT jlong OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(initNewSessionJni)(JNIEnv *env, jobject thiz)
{
OlmOutboundGroupSession* sessionPtr = NULL;
size_t sessionSize = 0;
LOGD("## initNewSessionJni(): outbound group session IN");
sessionSize = olm_outbound_group_session_size();
if(0 == sessionSize)
{
LOGE(" ## initNewSessionJni(): failure - outbound group session size = 0");
}
else if(NULL != (sessionPtr=(OlmOutboundGroupSession*)malloc(sessionSize)))
{
sessionPtr = olm_outbound_group_session(sessionPtr);
LOGD(" ## initNewSessionJni(): success - outbound group session size=%lu",sessionSize);
}
else
{
LOGE(" ## initNewSessionJni(): failure - outbound group session OOM");
}
return (jlong)(intptr_t)sessionPtr;
}
/**
* Start a new outbound session.
* @return ERROR_CODE_OK if operation succeed, ERROR_CODE_KO otherwise
*/
JNIEXPORT jint OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(initOutboundGroupSessionJni)(JNIEnv *env, jobject thiz)
{
jint retCode = ERROR_CODE_KO;
OlmOutboundGroupSession *sessionPtr = NULL;
uint8_t *randomBuffPtr = NULL;
LOGD("## initOutboundGroupSessionJni(): IN");
if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## initOutboundGroupSessionJni(): failure - invalid outbound group session instance");
}
else
{
// compute random buffer
size_t randomLength = olm_init_outbound_group_session_random_length(sessionPtr);
LOGW(" ## initOutboundGroupSessionJni(): randomLength=%lu",randomLength);
if((0!=randomLength) && !setRandomInBuffer(&randomBuffPtr, randomLength))
{
LOGE(" ## initOutboundGroupSessionJni(): failure - random buffer init");
}
else
{
if(0==randomLength)
{
LOGW(" ## initOutboundGroupSessionJni(): random buffer is not required");
}
size_t sessionResult = olm_init_outbound_group_session(sessionPtr, randomBuffPtr, randomLength);
if(sessionResult == olm_error()) {
const char *errorMsgPtr = olm_outbound_group_session_last_error(sessionPtr);
LOGE(" ## initOutboundGroupSessionJni(): failure - init outbound session creation Msg=%s",errorMsgPtr);
}
else
{
retCode = ERROR_CODE_OK;
LOGD(" ## initOutboundGroupSessionJni(): success - result=%lu", sessionResult);
}
}
}
if(NULL != randomBuffPtr)
{
free(randomBuffPtr);
}
return retCode;
}
/**
* Get a base64-encoded identifier for this outbound group session.
*/
JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(sessionIdentifierJni)(JNIEnv *env, jobject thiz)
{
OlmOutboundGroupSession *sessionPtr = NULL;
uint8_t *sessionIdPtr = NULL;
jstring returnValueStr=0;
LOGD("## sessionIdentifierJni(): outbound group session IN");
if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## sessionIdentifierJni(): failure - invalid outbound group session instance");
}
else
{
// get the size to alloc
size_t lengthSessionId = olm_outbound_group_session_id_length(sessionPtr);
LOGD(" ## sessionIdentifierJni(): outbound group session lengthSessionId=%lu",lengthSessionId);
if(NULL == (sessionIdPtr = (uint8_t*)malloc((lengthSessionId+1)*sizeof(uint8_t))))
{
LOGE(" ## sessionIdentifierJni(): failure - outbound identifier allocation OOM");
}
else
{
size_t result = olm_outbound_group_session_id(sessionPtr, sessionIdPtr, lengthSessionId);
if (result == olm_error())
{
const char *errorMsgPtr = olm_outbound_group_session_last_error(sessionPtr);
LOGE(" ## sessionIdentifierJni(): failure - outbound group session identifier failure Msg=%s",errorMsgPtr);
}
else
{
// update length
sessionIdPtr[result] = static_cast('\0');
LOGD(" ## sessionIdentifierJni(): success - outbound group session identifier result=%lu sessionId=%s",result, (char*)sessionIdPtr);
returnValueStr = env->NewStringUTF((const char*)sessionIdPtr);
}
// free alloc
free(sessionIdPtr);
}
}
return returnValueStr;
}
/**
* Get the current message index for this session.
* Each message is sent with an increasing index, this
* method returns the index for the next message.
* @return current session index
*/
JNIEXPORT jint OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(messageIndexJni)(JNIEnv *env, jobject thiz)
{
OlmOutboundGroupSession *sessionPtr = NULL;
jint indexRetValue = 0;
LOGD("## messageIndexJni(): IN");
if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## messageIndexJni(): failure - invalid outbound group session instance");
}
else
{
indexRetValue = static_cast(olm_outbound_group_session_message_index(sessionPtr));
}
LOGD(" ## messageIndexJni(): success - index=%d",indexRetValue);
return indexRetValue;
}
/**
* Get the base64-encoded current ratchet key for this session.
*/
JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(sessionKeyJni)(JNIEnv *env, jobject thiz)
{
OlmOutboundGroupSession *sessionPtr = NULL;
uint8_t *sessionKeyPtr = NULL;
jstring returnValueStr=0;
LOGD("## sessionKeyJni(): outbound group session IN");
if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## sessionKeyJni(): failure - invalid outbound group session instance");
}
else
{
// get the size to alloc
size_t sessionKeyLength = olm_outbound_group_session_key_length(sessionPtr);
LOGD(" ## sessionKeyJni(): sessionKeyLength=%lu",sessionKeyLength);
if(NULL == (sessionKeyPtr = (uint8_t*)malloc((sessionKeyLength+1)*sizeof(uint8_t))))
{
LOGE(" ## sessionKeyJni(): failure - session key allocation OOM");
}
else
{
size_t result = olm_outbound_group_session_key(sessionPtr, sessionKeyPtr, sessionKeyLength);
if (result == olm_error())
{
const char *errorMsgPtr = olm_outbound_group_session_last_error(sessionPtr);
LOGE(" ## sessionKeyJni(): failure - session key failure Msg=%s",errorMsgPtr);
}
else
{
// update length
sessionKeyPtr[result] = static_cast('\0');
LOGD(" ## sessionKeyJni(): success - outbound group session key result=%lu sessionKey=%s",result, (char*)sessionKeyPtr);
returnValueStr = env->NewStringUTF((const char*)sessionKeyPtr);
}
// free alloc
free(sessionKeyPtr);
}
}
return returnValueStr;
}
JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz, jstring aClearMsg)
{
jstring encryptedMsgRetValue = 0;
OlmOutboundGroupSession *sessionPtr = NULL;
const char *clearMsgPtr = NULL;
uint8_t *encryptedMsgPtr = NULL;
LOGD("## encryptMessageJni(): IN");
if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
{
LOGE(" ## encryptMessageJni(): failure - invalid outbound group session ptr=NULL");
}
else if(0 == aClearMsg)
{
LOGE(" ## encryptMessageJni(): failure - invalid clear message");
}
else if(0 == (clearMsgPtr = env->GetStringUTFChars(aClearMsg, 0)))
{
LOGE(" ## encryptMessageJni(): failure - clear message JNI allocation OOM");
}
else
{
// get clear message length
size_t clearMsgLength = (size_t)env->GetStringUTFLength(aClearMsg);
LOGD(" ## encryptMessageJni(): clearMsgLength=%lu",clearMsgLength);
// compute max encrypted length
size_t encryptedMsgLength = olm_group_encrypt_message_length(sessionPtr,clearMsgLength);
if(NULL == (encryptedMsgPtr = (uint8_t*)malloc((encryptedMsgLength+1)*sizeof(uint8_t))))
{
LOGE(" ## encryptMessageJni(): failure - encryptedMsgPtr buffer OOM");
}
else
{
LOGD(" ## encryptMessageJni(): estimated encryptedMsgLength=%lu",encryptedMsgLength);
size_t encryptedLength = olm_group_encrypt(sessionPtr,
(uint8_t*)clearMsgPtr,
clearMsgLength,
encryptedMsgPtr,
encryptedMsgLength);
if(encryptedLength == olm_error())
{
const char *errorMsgPtr = olm_outbound_group_session_last_error(sessionPtr);
LOGE(" ## encryptMessageJni(): failure - olm_group_encrypt Msg=%s",errorMsgPtr);
}
else
{
// update decrypted buffer size
encryptedMsgPtr[encryptedLength] = static_cast('\0');
LOGD(" ## encryptMessageJni(): encrypted returnedLg=%lu plainTextMsgPtr=%s",encryptedLength, (char*)encryptedMsgPtr);
encryptedMsgRetValue = env->NewStringUTF((const char*)encryptedMsgPtr);
}
}
}
// free alloc
if(NULL != clearMsgPtr)
{
env->ReleaseStringUTFChars(aClearMsg, clearMsgPtr);
}
if(NULL != encryptedMsgPtr)
{
free(encryptedMsgPtr);
}
return encryptedMsgRetValue;
}