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/* //device/libs/android_runtime/android_message_digest_sha1.cpp
**
** Copyright 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 "android_runtime/AndroidRuntime.h"
#include <openssl/sha.h>
//#define _DEBUG 1
// ----------------------------------------------------------------------------
using namespace android;
// ----------------------------------------------------------------------------
struct fields_t {
jfieldID context;
};
static fields_t fields;
static void native_init(JNIEnv *env, jobject clazz)
{
SHA_CTX* context;
#ifdef _DEBUG
printf("sha1.native_init\n");
#endif
context = (SHA_CTX *)malloc(sizeof(SHA_CTX));
SHA1_Init(context);
env->SetIntField(clazz, fields.context, (int)context);
}
static void native_reset(JNIEnv *env, jobject clazz)
{
SHA_CTX *context = (SHA_CTX *)env->GetIntField(clazz, fields.context);
if (context != NULL) {
#ifdef _DEBUG
printf("sha1.native_reset: free context\n");
#endif
free(context);
env->SetIntField(clazz, fields.context, 0 );
}
}
static void native_update(JNIEnv *env, jobject clazz, jbyteArray dataArray)
{
#ifdef _DEBUG
printf("sha1.native_update\n");
#endif
jbyte * data;
jsize dataSize;
SHA_CTX *context = (SHA_CTX *)env->GetIntField(clazz, fields.context);
if (context == NULL) {
#ifdef _DEBUG
printf("sha1.native_update: context is NULL, call init...\n");
#endif
native_init(env, clazz);
context = (SHA_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);
SHA1_Update(context, data, dataSize);
env->ReleaseByteArrayElements(dataArray, data, 0);
}
static jbyteArray native_digest(JNIEnv *env, jobject clazz)
{
#ifdef _DEBUG
printf("sha1.native_digest\n");
#endif
jbyteArray array;
jbyte md[SHA_DIGEST_LENGTH];
SHA_CTX *context = (SHA_CTX *)env->GetIntField(clazz, fields.context);
SHA1_Final((uint8_t*)md, context);
array = env->NewByteArray(SHA_DIGEST_LENGTH);
LOG_ASSERT(array, "Native could not create new byte[]");
env->SetByteArrayRegion(array, 0, SHA_DIGEST_LENGTH, md);
native_reset(env, clazz);
return array;
}
static JNINativeMethod method_table[] =
{
/* 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_message_digest_sha1(JNIEnv *env)
{
jclass clazz;
clazz = env->FindClass("android/security/Sha1MessageDigest");
if (clazz == NULL) {
LOGE("Can't find android/security/Sha1MessageDigest");
return -1;
}
fields.context = env->GetFieldID(clazz, "mNativeSha1Context", "I");
if (fields.context == NULL) {
LOGE("Can't find Sha1MessageDigest.mNativeSha1Context");
return -1;
}
return AndroidRuntime::registerNativeMethods(
env, "android/security/Sha1MessageDigest",
method_table, NELEM(method_table));
}
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