common/src/jni/main/cpp/conscrypt/jniload.cc

/*
 * Copyright (C) 2017 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 <jni.h>

#include <conscrypt/compatibility_close_monitor.h>
#include <conscrypt/jniutil.h>
#include <conscrypt/logging.h>
#include <conscrypt/native_crypto.h>

#ifndef CONSCRYPT_JNI_VERSION
#define CONSCRYPT_JNI_VERSION JNI_VERSION_1_6
#endif  // !CONSCRYPT_JNI_VERSION

using conscrypt::CompatibilityCloseMonitor;
using conscrypt::NativeCrypto;

// Give client libs everything they need to initialize our JNI
jint libconscrypt_JNI_OnLoad(JavaVM* vm, void*) {
    JNIEnv* env;
    if (vm->GetEnv(reinterpret_cast<void**>(&env), CONSCRYPT_JNI_VERSION) != JNI_OK) {
        CONSCRYPT_LOG_ERROR("Could not get JNIEnv");
        return JNI_ERR;
    }

    // Initialize the JNI constants.
    conscrypt::jniutil::init(vm, env);

    // Register all of the native JNI methods.
    NativeCrypto::registerNativeMethods(env);

    // Perform static initialization of the close monitor (if required on this platform).
    CompatibilityCloseMonitor::init();
    return CONSCRYPT_JNI_VERSION;
}

#ifdef STATIC_LIB

// A version of OnLoad called when the Conscrypt library has been statically linked to the JVM (For
// Java >= 1.8). The manner in which the library is statically linked is implementation specific.
//
// See http://openjdk.java.net/jeps/178
CONSCRYPT_PUBLIC jint JNI_OnLoad_conscrypt(JavaVM* vm, void* reserved) {
    return libconscrypt_JNI_OnLoad(vm, reserved);
}

#else  // !STATIC_LIB

// Method called by the JVM when the Conscrypt shared library is loaded.
CONSCRYPT_PUBLIC jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved) {
    return libconscrypt_JNI_OnLoad(vm, reserved);
}

#endif  // !STATIC_LIB