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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_utility.h"
using namespace AndroidOlmSdk;
OlmUtility* initializeUtilityMemory()
{
size_t utilitySize = olm_utility_size();
OlmUtility* utilityPtr = (OlmUtility*)malloc(utilitySize);
if (utilityPtr)
{
utilityPtr = olm_utility(utilityPtr);
LOGD("## initializeUtilityMemory(): success - OLM utility size=%lu",static_cast<long unsigned int>(utilitySize));
}
else
{
LOGE("## initializeUtilityMemory(): failure - OOM");
}
return utilityPtr;
}
JNIEXPORT jlong OLM_UTILITY_FUNC_DEF(createUtilityJni)(JNIEnv *env, jobject thiz)
{
OlmUtility* utilityPtr = initializeUtilityMemory();
LOGD("## createUtilityJni(): IN");
// init account memory allocation
if (!utilityPtr)
{
LOGE(" ## createUtilityJni(): failure - init OOM");
env->ThrowNew(env->FindClass("java/lang/Exception"), "init OOM");
}
else
{
LOGD(" ## createUtilityJni(): success");
}
return (jlong)(intptr_t)utilityPtr;
}
JNIEXPORT void OLM_UTILITY_FUNC_DEF(releaseUtilityJni)(JNIEnv *env, jobject thiz)
{
OlmUtility* utilityPtr = getUtilityInstanceId(env, thiz);
LOGD("## releaseUtilityJni(): IN");
if (!utilityPtr)
{
LOGE("## releaseUtilityJni(): failure - utility ptr=NULL");
}
else
{
olm_clear_utility(utilityPtr);
free(utilityPtr);
}
}
/**
* Verify an ed25519 signature.
* @param aSignature the base64-encoded message signature to be checked.
* @param aKey the ed25519 key (fingerprint key)
* @param aMessage the message which was signed
* @return 0 if validation succeed, an error message string if operation failed
*/
JNIEXPORT jstring OLM_UTILITY_FUNC_DEF(verifyEd25519SignatureJni)(JNIEnv *env, jobject thiz, jbyteArray aSignatureBuffer, jbyteArray aKeyBuffer, jbyteArray aMessageBuffer)
{
jstring errorMessageRetValue = 0;
OlmUtility* utilityPtr = getUtilityInstanceId(env, thiz);
jbyte* signaturePtr = NULL;
jbyte* keyPtr = NULL;
jbyte* messagePtr = NULL;
jboolean messageWasCopied = JNI_FALSE;
LOGD("## verifyEd25519SignatureJni(): IN");
if (!utilityPtr)
{
LOGE(" ## verifyEd25519SignatureJni(): failure - invalid utility ptr=NULL");
}
else if (!aSignatureBuffer || !aKeyBuffer || !aMessageBuffer)
{
LOGE(" ## verifyEd25519SignatureJni(): failure - invalid input parameters ");
}
else if (!(signaturePtr = env->GetByteArrayElements(aSignatureBuffer, 0)))
{
LOGE(" ## verifyEd25519SignatureJni(): failure - signature JNI allocation OOM");
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
{
LOGE(" ## verifyEd25519SignatureJni(): failure - key JNI allocation OOM");
}
else if (!(messagePtr = env->GetByteArrayElements(aMessageBuffer, &messageWasCopied)))
{
LOGE(" ## verifyEd25519SignatureJni(): failure - message JNI allocation OOM");
}
else
{
size_t signatureLength = (size_t)env->GetArrayLength(aSignatureBuffer);
size_t keyLength = (size_t)env->GetArrayLength(aKeyBuffer);
size_t messageLength = (size_t)env->GetArrayLength(aMessageBuffer);
LOGD(" ## verifyEd25519SignatureJni(): signatureLength=%lu keyLength=%lu messageLength=%lu",static_cast<long unsigned int>(signatureLength),static_cast<long unsigned int>(keyLength),static_cast<long unsigned int>(messageLength));
LOGD(" ## verifyEd25519SignatureJni(): key=%.*s", static_cast<int>(keyLength), keyPtr);
size_t result = olm_ed25519_verify(utilityPtr,
(void const *)keyPtr,
keyLength,
(void const *)messagePtr,
messageLength,
(void*)signaturePtr,
signatureLength);
if (result == olm_error()) {
const char *errorMsgPtr = olm_utility_last_error(utilityPtr);
errorMessageRetValue = env->NewStringUTF(errorMsgPtr);
LOGE("## verifyEd25519SignatureJni(): failure - olm_ed25519_verify Msg=%s",errorMsgPtr);
}
else
{
LOGD("## verifyEd25519SignatureJni(): success - result=%lu", static_cast<long unsigned int>(result));
}
}
// free alloc
if (signaturePtr)
{
env->ReleaseByteArrayElements(aSignatureBuffer, signaturePtr, JNI_ABORT);
}
if (keyPtr)
{
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}
if (messagePtr)
{
if (messageWasCopied) {
memset(messagePtr, 0, (size_t)env->GetArrayLength(aMessageBuffer));
}
env->ReleaseByteArrayElements(aMessageBuffer, messagePtr, JNI_ABORT);
}
return errorMessageRetValue;
}
/**
* Compute the digest (SHA 256) for the message passed in parameter.<br>
* The digest value is the function return value.
* An exception is thrown if the operation fails.
* @param aMessage the message
* @return digest of the message.
**/
JNIEXPORT jbyteArray OLM_UTILITY_FUNC_DEF(sha256Jni)(JNIEnv *env, jobject thiz, jbyteArray aMessageToHashBuffer)
{
jbyteArray sha256Ret = 0;
OlmUtility* utilityPtr = getUtilityInstanceId(env, thiz);
jbyte* messagePtr = NULL;
jboolean messageWasCopied = JNI_FALSE;
LOGD("## sha256Jni(): IN");
if (!utilityPtr)
{
LOGE(" ## sha256Jni(): failure - invalid utility ptr=NULL");
}
else if(!aMessageToHashBuffer)
{
LOGE(" ## sha256Jni(): failure - invalid message parameters ");
}
else if(!(messagePtr = env->GetByteArrayElements(aMessageToHashBuffer, &messageWasCopied)))
{
LOGE(" ## sha256Jni(): failure - message JNI allocation OOM");
}
else
{
// get lengths
size_t messageLength = (size_t)env->GetArrayLength(aMessageToHashBuffer);
size_t hashLength = olm_sha256_length(utilityPtr);
void* hashValuePtr = malloc((hashLength)*sizeof(uint8_t));
if (!hashValuePtr)
{
LOGE("## sha256Jni(): failure - hash value allocation OOM");
}
else
{
size_t result = olm_sha256(utilityPtr,
(void const *)messagePtr,
messageLength,
(void *)hashValuePtr,
hashLength);
if (result == olm_error())
{
LOGE("## sha256Jni(): failure - hash creation Msg=%s",(const char *)olm_utility_last_error(utilityPtr));
}
else
{
LOGD("## sha256Jni(): success - result=%lu hashValue=%.*s",static_cast<long unsigned int>(result), static_cast<int>(result), (char*)hashValuePtr);
sha256Ret = env->NewByteArray(result);
env->SetByteArrayRegion(sha256Ret, 0 , result, (jbyte*)hashValuePtr);
}
free(hashValuePtr);
}
}
if (messagePtr)
{
if (messageWasCopied) {
memset(messagePtr, 0, (size_t)env->GetArrayLength(aMessageToHashBuffer));
}
env->ReleaseByteArrayElements(aMessageToHashBuffer, messagePtr, JNI_ABORT);
}
return sha256Ret;
}
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