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wolfcrypt-jni/jni/jni_aesgcm.c

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/* jni_aesgcm.c
*
* Copyright (C) 2006-2025 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#include <stdint.h>
#ifdef WOLFSSL_USER_SETTINGS
#include <wolfssl/wolfcrypt/settings.h>
#elif !defined(__ANDROID__)
#include <wolfssl/options.h>
#endif
#include <wolfssl/wolfcrypt/aes.h>
#include <com_wolfssl_wolfcrypt_AesGcm.h>
#include <wolfcrypt_jni_NativeStruct.h>
#include <wolfcrypt_jni_error.h>
/* #define WOLFCRYPT_JNI_DEBUG_ON */
#include <wolfcrypt_jni_debug.h>
JNIEXPORT jlong JNICALL Java_com_wolfssl_wolfcrypt_AesGcm_mallocNativeStruct_1internal
(JNIEnv* env, jobject this)
{
#ifndef NO_AES
Aes* aes = NULL;
(void)this;
aes = (Aes*)XMALLOC(sizeof(Aes), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (aes == NULL) {
throwOutOfMemoryException(env, "Failed to allocate Aes object");
}
else {
XMEMSET(aes, 0, sizeof(Aes));
}
LogStr("new AesGcm() = %p\n", aes);
return (jlong)(uintptr_t)aes;
#else
(void)this;
throwNotCompiledInException(env);
return (jlong)0;
#endif
}
JNIEXPORT void JNICALL Java_com_wolfssl_wolfcrypt_AesGcm_wc_1AesInit
(JNIEnv* env, jobject this)
{
#ifndef NO_AES
int ret = 0;
Aes* aes = NULL;
(void)this;
aes = (Aes*) getNativeStruct(env, this);
if ((*env)->ExceptionOccurred(env)) {
/* getNativeStruct may throw exception, if so stop and return */
return;
}
ret = wc_AesInit(aes, NULL, INVALID_DEVID);
if (ret != 0) {
throwWolfCryptExceptionFromError(env, ret);
}
LogStr("wc_AesInit(aes=%p)\n", aes);
#else
(void)this;
throwNotCompiledInException(env);
#endif
}
JNIEXPORT void JNICALL Java_com_wolfssl_wolfcrypt_AesGcm_wc_1AesFree
(JNIEnv* env, jobject this)
{
#ifndef NO_AES
Aes* aes = NULL;
(void)this;
aes = (Aes*) getNativeStruct(env, this);
if ((*env)->ExceptionOccurred(env)) {
/* getNativeStruct may throw exception, if so stop and return */
return;
}
wc_AesFree(aes);
LogStr("wc_AesFree(aes=%p)\n", aes);
#else
(void)this;
throwNotCompiledInException(env);
#endif
}
JNIEXPORT void JNICALL Java_com_wolfssl_wolfcrypt_AesGcm_wc_1AesGcmSetKey
(JNIEnv* env, jobject this, jbyteArray keyArr)
{
#if !defined(NO_AES) && defined(HAVE_AESGCM)
int ret = 0;
Aes* aes = NULL;
const byte* key = NULL;
word32 keyLen = 0;
aes = (Aes*) getNativeStruct(env, this);
if ((*env)->ExceptionOccurred(env)) {
/* getNativeStruct may throw exception, if so stop and return */
return;
}
if (keyArr != NULL) {
key = (const byte*)(*env)->GetByteArrayElements(env, keyArr, NULL);
keyLen = (*env)->GetArrayLength(env, keyArr);
}
if (key == NULL || keyLen == 0) {
ret = BAD_FUNC_ARG;
}
if (ret == 0) {
ret = wc_AesGcmSetKey(aes, key, keyLen);
}
if (keyArr != NULL) {
(*env)->ReleaseByteArrayElements(env, keyArr, (jbyte*)key, JNI_ABORT);
}
if (ret != 0) {
throwWolfCryptExceptionFromError(env, ret);
}
LogStr("wc_AesGcmSetKey(aes = %p, keylen = %d)\n", aes, keyLen);
#else
(void)this;
throwNotCompiledInException(env);
#endif
}
JNIEXPORT jbyteArray JNICALL Java_com_wolfssl_wolfcrypt_AesGcm_wc_1AesGcmEncrypt
(JNIEnv* env, jobject this, jbyteArray inputArr, jbyteArray ivArr, jbyteArray authTagArr, jbyteArray authInArr)
{
#if !defined(NO_AES) && defined(HAVE_AESGCM)
int ret = 0;
Aes* aes = NULL;
const byte* in = NULL;
const byte* iv = NULL;
byte* authTag = NULL;
const byte* authIn = NULL;
word32 inLen = 0;
word32 ivSz = 0;
word32 authTagSz = 0;
word32 authInSz = 0;
byte* out = NULL;
jbyteArray outArr = NULL;
aes = (Aes*) getNativeStruct(env, this);
if ((*env)->ExceptionOccurred(env)) {
/* getNativeStruct may throw exception, if so stop and return */
return NULL;
}
if (inputArr != NULL) {
in = (const byte*)(*env)->GetByteArrayElements(env, inputArr, NULL);
inLen = (*env)->GetArrayLength(env, inputArr);
}
if (ivArr != NULL) {
iv = (byte*)(*env)->GetByteArrayElements(env, ivArr, NULL);
ivSz = (*env)->GetArrayLength(env, ivArr);
}
if (authTagArr != NULL) {
authTag = (byte*)(*env)->GetByteArrayElements(env, authTagArr, NULL);
authTagSz = (*env)->GetArrayLength(env, authTagArr);
}
if (authInArr != NULL) {
authIn = (byte*)(*env)->GetByteArrayElements(env, authInArr, NULL);
authInSz = (*env)->GetArrayLength(env, authInArr);
}
/* authIn can be null */
if (in == NULL || inLen == 0 || iv == NULL || ivSz == 0 ||
authTag == NULL || authTagSz == 0) {
ret = BAD_FUNC_ARG;
}
/* Allocate new buffer to hold ciphertext */
if (ret == 0) {
out = (byte*)XMALLOC(inLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (out == NULL) {
ret = MEMORY_E;
}
else {
XMEMSET(out, 0, inLen);
}
}
if (ret == 0) {
ret = wc_AesGcmEncrypt(aes, out, in, inLen, iv, ivSz,
authTag, authTagSz, authIn, authInSz);
}
/* Create new jbyteArray to return output */
if (ret == 0) {
outArr = (*env)->NewByteArray(env, inLen);
if (outArr == NULL) {
ret = MEMORY_E;
}
else {
(*env)->SetByteArrayRegion(env, outArr, 0, inLen, (jbyte*)out);
if ((*env)->ExceptionOccurred(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
(*env)->DeleteLocalRef(env, outArr);
outArr = NULL;
ret = -1;
}
}
}
/* Commit authTag changes back to original Java array on success */
if (authTagArr != NULL) {
if (ret == 0) {
(*env)->ReleaseByteArrayElements(env, authTagArr,
(jbyte*)authTag, JNI_COMMIT);
}
else {
(*env)->ReleaseByteArrayElements(env, authTagArr,
(jbyte*)authTag, JNI_ABORT);
}
}
/* Release all other byte arrays without changing original arrays */
if (inputArr != NULL) {
(*env)->ReleaseByteArrayElements(env, inputArr, (jbyte*)in,
JNI_ABORT);
}
if (ivArr != NULL) {
(*env)->ReleaseByteArrayElements(env, ivArr, (jbyte*)iv,
JNI_ABORT);
}
if (authInArr != NULL) {
(*env)->ReleaseByteArrayElements(env, authInArr, (jbyte*)authIn,
JNI_ABORT);
}
if (out != NULL) {
XFREE(out, NULL, DYNAMIC_TYPE_TMP_BUFFER);
}
LogStr("wc_AesGcmEncrypt(aes = %p, inLen = %d, ivSz = %d, "
"authTagSz = %d, authInSz = %d)\n", aes, inLen, ivSz,
authTagSz, authInSz);
if (ret != 0) {
throwWolfCryptExceptionFromError(env, ret);
return NULL;
}
return outArr;
#else
(void)this;
(void)input;
(void)iv;
(void)authTag;
(void)authIn;
throwNotCompiledInException(env);
return NULL;
#endif
}
JNIEXPORT jbyteArray JNICALL Java_com_wolfssl_wolfcrypt_AesGcm_wc_1AesGcmDecrypt
(JNIEnv* env, jobject this, jbyteArray inputArr, jbyteArray ivArr, jbyteArray authTagArr, jbyteArray authInArr)
{
#if !defined(NO_AES) && defined(HAVE_AESGCM)
int ret = 0;
Aes* aes = NULL;
const byte* in = NULL;
const byte* iv = NULL;
const byte* authTag = NULL;
const byte* authIn = NULL;
word32 inLen = 0;
word32 ivSz = 0;
word32 authTagSz = 0;
word32 authInSz = 0;
byte* out = NULL;
jbyteArray outArr = NULL;
aes = (Aes*) getNativeStruct(env, this);
if ((*env)->ExceptionOccurred(env)) {
/* getNativeStruct may throw exception, if so stop and return */
return NULL;
}
if (inputArr != NULL) {
in = (byte*)(*env)->GetByteArrayElements(env, inputArr, NULL);
inLen = (*env)->GetArrayLength(env, inputArr);
}
if (ivArr != NULL) {
iv = (byte*)(*env)->GetByteArrayElements(env, ivArr, NULL);
ivSz = (*env)->GetArrayLength(env, ivArr);
}
if (authTagArr != NULL) {
authTag = (byte*)(*env)->GetByteArrayElements(env, authTagArr, NULL);
authTagSz = (*env)->GetArrayLength(env, authTagArr);
}
if (authInArr != NULL) {
authIn = (byte*)(*env)->GetByteArrayElements(env, authInArr, NULL);
authInSz = (*env)->GetArrayLength(env, authInArr);
}
if (in == NULL || inLen == 0 || iv == NULL || ivSz == 0 ||
authTag == NULL || authTagSz == 0) {
ret = BAD_FUNC_ARG;
}
if (ret == 0) {
out = (byte*)XMALLOC(inLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (out == NULL) {
ret = MEMORY_E;
}
else {
XMEMSET(out, 0, inLen);
}
}
if (ret == 0) {
ret = wc_AesGcmDecrypt(aes, out, in, inLen, iv, ivSz,
authTag, authTagSz, authIn, authInSz);
}
/* Create new jbyteArray to return output */
if (ret == 0) {
outArr = (*env)->NewByteArray(env, inLen);
if (outArr == NULL) {
ret = MEMORY_E;
}
else {
(*env)->SetByteArrayRegion(env, outArr, 0, inLen, (jbyte*)out);
if ((*env)->ExceptionOccurred(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
(*env)->DeleteLocalRef(env, outArr);
outArr = NULL;
ret = -1;
}
}
}
/* Release all byte arrays without changing original arrays */
if (inputArr != NULL) {
(*env)->ReleaseByteArrayElements(env, inputArr, (jbyte*)in,
JNI_ABORT);
}
if (ivArr != NULL) {
(*env)->ReleaseByteArrayElements(env, ivArr, (jbyte*)iv,
JNI_ABORT);
}
if (authInArr != NULL) {
(*env)->ReleaseByteArrayElements(env, authInArr, (jbyte*)authIn,
JNI_ABORT);
}
if (authTagArr != NULL) {
(*env)->ReleaseByteArrayElements(env, authTagArr, (jbyte*)authTag,
JNI_ABORT);
}
if (out != NULL) {
XMEMSET(out, 0, inLen);
XFREE(out, NULL, DYNAMIC_TYPE_TMP_BUFFER);
}
LogStr("wc_AesGcmDecrypt(aes = %p, inLen = %d, ivSz = %d, "
"authTagSz = %d, authInSz = %d)\n", aes, inLen, ivSz,
authTagSz, authInSz);
if (ret != 0) {
throwWolfCryptExceptionFromError(env, ret);
}
return outArr;
#else
(void)this;
(void)input;
(void)iv;
(void)authTag;
(void)authIn;
throwNotCompiledInException(env);
return NULL;
#endif
}
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