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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 "OverrideLog.h"
#include "SecureElement.h"
#include "JavaClassConstants.h"
#include "PowerSwitch.h"
namespace android
{
extern void com_android_nfc_NfcManager_disableDiscovery (JNIEnv* e, jobject o);
extern void com_android_nfc_NfcManager_enableDiscovery (JNIEnv* e, jobject o, jint mode);
extern int gGeneralTransceiveTimeout;
/*******************************************************************************
**
** Function: nativeNfcSecureElement_doOpenSecureElementConnection
**
** Description: Connect to the secure element.
** e: JVM environment.
** o: Java object.
**
** Returns: Handle of secure element. 0 is failure.
**
*******************************************************************************/
static jint nativeNfcSecureElement_doOpenSecureElementConnection (JNIEnv* e, jobject o)
{
ALOGD("%s: enter", __FUNCTION__);
bool stat = true;
jint secElemHandle = 0;
SecureElement &se = SecureElement::getInstance();
if (se.isActivatedInListenMode()) {
ALOGD("Denying SE open due to SE listen mode active");
goto TheEnd;
}
if (se.isRfFieldOn()) {
ALOGD("Denying SE open due to SE in active RF field");
goto TheEnd;
}
//tell the controller to power up to get ready for sec elem operations
PowerSwitch::getInstance ().setLevel (PowerSwitch::FULL_POWER);
PowerSwitch::getInstance ().setModeOn (PowerSwitch::SE_CONNECTED);
//if controller is not routing AND there is no pipe connected,
//then turn on the sec elem
if (! se.isBusy())
stat = se.activate(0);
if (stat)
{
//establish a pipe to sec elem
stat = se.connectEE();
if (stat)
secElemHandle = se.mActiveEeHandle;
else
se.deactivate (0);
}
//if code fails to connect to the secure element, and nothing is active, then
//tell the controller to power down
if ((!stat) && (! PowerSwitch::getInstance ().setModeOff (PowerSwitch::SE_CONNECTED)))
{
PowerSwitch::getInstance ().setLevel (PowerSwitch::LOW_POWER);
}
TheEnd:
ALOGD("%s: exit; return handle=0x%X", __FUNCTION__, secElemHandle);
return secElemHandle;
}
/*******************************************************************************
**
** Function: nativeNfcSecureElement_doDisconnectSecureElementConnection
**
** Description: Disconnect from the secure element.
** e: JVM environment.
** o: Java object.
** handle: Handle of secure element.
**
** Returns: True if ok.
**
*******************************************************************************/
static jboolean nativeNfcSecureElement_doDisconnectSecureElementConnection (JNIEnv* e, jobject o, jint handle)
{
ALOGD("%s: enter; handle=0x%04x", __FUNCTION__, handle);
bool stat = false;
stat = SecureElement::getInstance().disconnectEE (handle);
//if controller is not routing AND there is no pipe connected,
//then turn off the sec elem
if (! SecureElement::getInstance().isBusy())
SecureElement::getInstance().deactivate (handle);
//if nothing is active after this, then tell the controller to power down
if (! PowerSwitch::getInstance ().setModeOff (PowerSwitch::SE_CONNECTED))
PowerSwitch::getInstance ().setLevel (PowerSwitch::LOW_POWER);
ALOGD("%s: exit", __FUNCTION__);
return stat ? JNI_TRUE : JNI_FALSE;
}
/*******************************************************************************
**
** Function: nativeNfcSecureElement_doTransceive
**
** Description: Send data to the secure element; retrieve response.
** e: JVM environment.
** o: Java object.
** handle: Secure element's handle.
** data: Data to send.
**
** Returns: Buffer of received data.
**
*******************************************************************************/
static jbyteArray nativeNfcSecureElement_doTransceive (JNIEnv* e, jobject o, jint handle, jbyteArray data)
{
UINT8* buf = NULL;
INT32 buflen = 0;
const INT32 recvBufferMaxSize = 1024;
UINT8 recvBuffer [recvBufferMaxSize];
INT32 recvBufferActualSize = 0;
jbyteArray result = NULL;
buf = (UINT8*) e->GetByteArrayElements (data, NULL);
buflen = e->GetArrayLength (data);
ALOGD("%s: enter; handle=0x%X; buf len=%ld", __FUNCTION__, handle, buflen);
SecureElement::getInstance().transceive (buf, buflen, recvBuffer, recvBufferMaxSize, recvBufferActualSize, gGeneralTransceiveTimeout);
//copy results back to java
result = e->NewByteArray (recvBufferActualSize);
if (result != NULL)
{
e->SetByteArrayRegion (result, 0, recvBufferActualSize, (jbyte *) recvBuffer);
}
e->ReleaseByteArrayElements (data, (jbyte *) buf, JNI_ABORT);
ALOGD("%s: exit: recv len=%ld", __FUNCTION__, recvBufferActualSize);
return result;
}
/*******************************************************************************
**
** Function: nativeNfcSecureElement_doGetUid
**
** Description: Get the secure element's unique ID.
** e: JVM environment.
** o: Java object.
** handle: Handle of secure element.
**
** Returns: Secure element's unique ID.
**
*******************************************************************************/
static jbyteArray nativeNfcSecureElement_doGetUid (JNIEnv* e, jobject o, jint handle)
{
ALOGD("%s: enter; handle=0x%X", __FUNCTION__, handle);
jbyteArray secureElementUid = NULL;
SecureElement::getInstance ().getUiccId (handle, secureElementUid);
ALOGD("%s: exit", __FUNCTION__);
return secureElementUid;
}
/*******************************************************************************
**
** Function: nativeNfcSecureElement_doGetTechList
**
** Description: Get a list of technologies that the secure element supports.
** e: JVM environment.
** o: Java object.
** handle: Handle of secure element.
**
** Returns: Array of technologies.
**
*******************************************************************************/
static jintArray nativeNfcSecureElement_doGetTechList (JNIEnv* e, jobject o, jint handle)
{
ALOGD("%s: enter; handle=0x%X", __FUNCTION__, handle);
jintArray techList = NULL;
SecureElement::getInstance().getTechnologyList (handle, techList);
ALOGD("%s: exit", __FUNCTION__);
return techList;
}
/*****************************************************************************
**
** Description: JNI functions
**
*****************************************************************************/
static JNINativeMethod gMethods[] =
{
{"doNativeOpenSecureElementConnection", "()I", (void *) nativeNfcSecureElement_doOpenSecureElementConnection},
{"doNativeDisconnectSecureElementConnection", "(I)Z", (void *) nativeNfcSecureElement_doDisconnectSecureElementConnection},
{"doTransceive", "(I[B)[B", (void *) nativeNfcSecureElement_doTransceive},
{"doGetUid", "(I)[B", (void *) nativeNfcSecureElement_doGetUid},
{"doGetTechList", "(I)[I", (void *) nativeNfcSecureElement_doGetTechList},
};
/*******************************************************************************
**
** Function: register_com_android_nfc_NativeNfcSecureElement
**
** Description: Regisgter JNI functions with Java Virtual Machine.
** e: Environment of JVM.
**
** Returns: Status of registration.
**
*******************************************************************************/
int register_com_android_nfc_NativeNfcSecureElement(JNIEnv *e)
{
return jniRegisterNativeMethods(e, gNativeNfcSecureElementClassName,
gMethods, NELEM(gMethods));
}
} // namespace android
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