JNIEXPORT jlong JNICALL Java_com_intel_chimera_cipher_OpensslNative_init
(JNIEnv *env, jclass clazz, jlong ctx, jint mode, jint alg, jint padding,
jbyteArray key, jbyteArray iv)
{
int jKeyLen = (*env)->GetArrayLength(env, key);
int jIvLen = (*env)->GetArrayLength(env, iv);
if (jKeyLen != KEY_LENGTH_128 && jKeyLen != KEY_LENGTH_192
&& jKeyLen != KEY_LENGTH_256) {
THROW(env, "java/lang/IllegalArgumentException", "Invalid key length.");
return (jlong)0;
}
if (jIvLen != IV_LENGTH) {
THROW(env, "java/lang/IllegalArgumentException", "Invalid iv length.");
return (jlong)0;
}
EVP_CIPHER_CTX *context = CONTEXT(ctx);
if (context == 0) {
// Create and initialize a EVP_CIPHER_CTX
context = dlsym_EVP_CIPHER_CTX_new();
if (!context) {
THROW(env, "java/lang/OutOfMemoryError", NULL);
return (jlong)0;
}
}
jbyte *jKey = (*env)->GetByteArrayElements(env, key, NULL);
if (jKey == NULL) {
THROW(env, "java/lang/InternalError", "Cannot get bytes array for key.");
return (jlong)0;
}
jbyte *jIv = (*env)->GetByteArrayElements(env, iv, NULL);
if (jIv == NULL) {
(*env)->ReleaseByteArrayElements(env, key, jKey, 0);
THROW(env, "java/lang/InternalError", "Cannot get bytes array for iv.");
return (jlong)0;
}
int rc = dlsym_EVP_CipherInit_ex(context, getEvpCipher(alg, jKeyLen), \
NULL, (unsigned char *)jKey, (unsigned char *)jIv, mode == ENCRYPT_MODE);
(*env)->ReleaseByteArrayElements(env, key, jKey, 0);
(*env)->ReleaseByteArrayElements(env, iv, jIv, 0);
if (rc == 0) {
dlsym_EVP_CIPHER_CTX_cleanup(context);
THROW(env, "java/lang/InternalError", "Error in EVP_CipherInit_ex.");
return (jlong)0;
}
if (padding == NOPADDING) {
dlsym_EVP_CIPHER_CTX_set_padding(context, 0);
} else if (padding == PKCS5PADDING) {
dlsym_EVP_CIPHER_CTX_set_padding(context, 1);
}
return JLONG(context);
}
/**
* Create an 256 bit key and IV using the supplied key_data. salt can be added for taste.
* Fills in the encryption and decryption ctx objects and returns 0 on success
**/
bool OpensslAES::init(const QByteArray &keyData,
const QByteArray &saltData)
{
int i, nrounds = 5;
unsigned char key[32], iv[32];
const EVP_CIPHER *evpCipher = getEvpCipher();
if (evpCipher == 0)
return false;
/* 8 bytes (required EVP_BytesToKey) to salt the key_data during key generation. */
unsigned char salt[8] = {0xAD, 0x7E, 0xF8, 0x14, 0x92, 0x31,0x2B, 0x3F};
QByteArray saltDataHash = QCryptographicHash::hash(saltData, QCryptographicHash::Md5);
memcpy(salt, saltDataHash.constData(), 8);
/*
* Gen key & IV for choosen algoritm. A SHA1 digest is used to hash the supplied key material.
* nrounds is the number of times the we hash the material. More rounds are more secure but
* slower.
*/
i = EVP_BytesToKey(evpCipher, EVP_sha1(), salt,
(const unsigned char*) keyData.constData(), keyData.size(),
nrounds, key, iv);
if (i*8 != m_blockSize) { // i*8 = blocksize in bits
printf("Key size is %d bytes - should be %d bits\n", i, m_blockSize);
return false;
}
EVP_CIPHER_CTX_init(&m_encoder);
EVP_EncryptInit_ex(&m_encoder, evpCipher, 0, key, iv);
EVP_CIPHER_CTX_init(&m_decoder);
EVP_DecryptInit_ex(&m_decoder, evpCipher, 0, key, iv);
return true;
}
JNIEXPORT jlong JNICALL Java_org_apache_commons_crypto_cipher_OpenSslNative_init
(JNIEnv *env, jclass clazz, jlong ctx, jint mode, jint alg, jint padding,
jbyteArray key, jbyteArray iv)
{
jlong result = 0L;
EVP_CIPHER_CTX *context = CONTEXT(ctx);
jbyte *jKey = NULL;
jbyte *jIv = NULL;
int jKeyLen = (*env)->GetArrayLength(env, key);
int jIvLen = (*env)->GetArrayLength(env, iv);
if (jKeyLen != KEY_LENGTH_128 && jKeyLen != KEY_LENGTH_192
&& jKeyLen != KEY_LENGTH_256) {
char str[64] = {0};
snprintf(str, sizeof(str), "Invalid AES key length: %d bytes", jKeyLen);
THROW(env, "java/security/InvalidKeyException", str);
goto cleanup;
}
if (jIvLen != IV_LENGTH) {
THROW(env, "java/security/InvalidAlgorithmParameterException", "Wrong IV length: must be 16 bytes long");
goto cleanup;
}
if (context == 0) {
// Create and initialize a EVP_CIPHER_CTX
context = dlsym_EVP_CIPHER_CTX_new();
if (!context) {
THROW(env, "java/lang/OutOfMemoryError", NULL);
return (jlong)0;
}
}
jKey = (*env)->GetByteArrayElements(env, key, NULL);
if (jKey == NULL) {
THROW(env, "java/lang/InternalError", "Cannot get bytes array for key.");
goto cleanup;
}
jIv = (*env)->GetByteArrayElements(env, iv, NULL);
if (jIv == NULL) {
THROW(env, "java/lang/InternalError", "Cannot get bytes array for iv.");
goto cleanup;
}
if (!(alg == AES_CTR || alg == AES_CBC)) {
THROW(env, "java/security/NoSuchAlgorithmException", "The algorithm is not supported.");
goto cleanup;
}
int rc = dlsym_EVP_CipherInit_ex(context, getEvpCipher(alg, jKeyLen), \
NULL, (unsigned char *)jKey, (unsigned char *)jIv, mode == ENCRYPT_MODE);
if (rc == 0) {
THROW(env, "java/lang/InternalError", "Error in EVP_CipherInit_ex.");
goto cleanup;
}
if (padding == NOPADDING) {
dlsym_EVP_CIPHER_CTX_set_padding(context, 0);
} else if (padding == PKCS5PADDING) {
dlsym_EVP_CIPHER_CTX_set_padding(context, 1);
}
// everything is OK,
result = JLONG(context);
cleanup:
if (result == 0 && context != NULL) {
if (CONTEXT(ctx) != NULL) {
dlsym_EVP_CIPHER_CTX_cleanup(context);
} else {
dlsym_EVP_CIPHER_CTX_free(context);
}
}
if (jKey != NULL) {
(*env)->ReleaseByteArrayElements(env, key, jKey, 0);
}
if (jIv != NULL) {
(*env)->ReleaseByteArrayElements(env, iv, jIv, 0);
}
return result;
}
