| /* |
| * Copyright (C) 2006 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 <JNIHelp.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| |
| #include <openssl/md5.h> |
| |
| namespace android |
| { |
| |
| struct fields_t { |
| jfieldID context; |
| }; |
| static fields_t fields; |
| |
| static void native_init(JNIEnv *env, jobject clazz) |
| { |
| MD5_CTX* context = (MD5_CTX *)malloc(sizeof(MD5_CTX)); |
| MD5_Init(context); |
| |
| env->SetIntField(clazz, fields.context, (int)context); |
| } |
| |
| static void native_reset(JNIEnv *env, jobject clazz) |
| { |
| MD5_CTX *context = (MD5_CTX *)env->GetIntField(clazz, fields.context); |
| if (context != NULL) { |
| free(context); |
| env->SetIntField(clazz, fields.context, 0 ); |
| } |
| } |
| |
| static void native_update(JNIEnv *env, jobject clazz, jbyteArray dataArray) |
| { |
| jbyte * data; |
| jsize dataSize; |
| MD5_CTX *context = (MD5_CTX *)env->GetIntField(clazz, fields.context); |
| |
| if (context == NULL) { |
| native_init(env, clazz); |
| context = (MD5_CTX *)env->GetIntField(clazz, fields.context); |
| } |
| |
| data = env->GetByteArrayElements(dataArray, NULL); |
| if (data == NULL) { |
| LOGE("Unable to get byte array elements"); |
| jniThrowException(env, "java/lang/IllegalArgumentException", |
| "Invalid data array when calling MessageDigest.update()"); |
| return; |
| } |
| dataSize = env->GetArrayLength(dataArray); |
| |
| MD5_Update(context, data, dataSize); |
| |
| env->ReleaseByteArrayElements(dataArray, data, 0); |
| } |
| |
| static jbyteArray native_digest(JNIEnv *env, jobject clazz) |
| { |
| jbyteArray array; |
| jbyte md[MD5_DIGEST_LENGTH]; |
| MD5_CTX *context = (MD5_CTX *)env->GetIntField(clazz, fields.context); |
| |
| MD5_Final((uint8_t*)md, context); |
| |
| array = env->NewByteArray(MD5_DIGEST_LENGTH); |
| LOG_ASSERT(array, "Native could not create new byte[]"); |
| |
| env->SetByteArrayRegion(array, 0, MD5_DIGEST_LENGTH, md); |
| |
| native_reset(env, clazz); |
| |
| return array; |
| } |
| |
| |
| /* |
| * JNI registration. |
| */ |
| |
| static JNINativeMethod gMethods[] = |
| { |
| /* name, signature, funcPtr */ |
| {"init", "()V", (void *)native_init}, |
| {"update", "([B)V", (void *)native_update}, |
| {"digest", "()[B", (void *)native_digest}, |
| {"reset", "()V", (void *)native_reset}, |
| }; |
| |
| int register_android_security_Md5MessageDigest(JNIEnv *env) |
| { |
| jclass clazz; |
| |
| clazz = env->FindClass("android/security/Md5MessageDigest"); |
| if (clazz == NULL) { |
| LOGE("Can't find android/security/Md5MessageDigest"); |
| return -1; |
| } |
| |
| fields.context = env->GetFieldID(clazz, "mNativeMd5Context", "I"); |
| if (fields.context == NULL) { |
| LOGE("Can't find Md5MessageDigest.mNativeMd5Context"); |
| return -1; |
| } |
| |
| return jniRegisterNativeMethods(env, "android/security/Md5MessageDigest", |
| gMethods, NELEM(gMethods)); |
| } |
| |
| }; |