mirror of https://git.matrix.org/git/olm.git
594 lines
20 KiB
C++
594 lines
20 KiB
C++
/*
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* Copyright 2018 New Vector Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "olm_pk.h"
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#include "olm/olm.h"
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using namespace AndroidOlmSdk;
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OlmPkEncryption * initializePkEncryptionMemory()
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{
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size_t encryptionSize = olm_pk_encryption_size();
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OlmPkEncryption *encryptionPtr = (OlmPkEncryption *)malloc(encryptionSize);
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if (encryptionPtr)
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{
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// init encryption object
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encryptionPtr = olm_pk_encryption(encryptionPtr);
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LOGD(
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"## initializePkEncryptionMemory(): success - OLM encryption size=%lu",
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static_cast<long unsigned int>(encryptionSize)
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);
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}
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else
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{
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LOGE("## initializePkEncryptionMemory(): failure - OOM");
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}
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return encryptionPtr;
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}
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JNIEXPORT jlong OLM_PK_ENCRYPTION_FUNC_DEF(createNewPkEncryptionJni)(JNIEnv *env, jobject thiz)
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{
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const char* errorMessage = NULL;
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OlmPkEncryption *encryptionPtr = initializePkEncryptionMemory();
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// init encryption memory allocation
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if (!encryptionPtr)
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{
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LOGE("## createNewPkEncryptionJni(): failure - init encryption OOM");
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errorMessage = "init encryption OOM";
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}
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else
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{
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LOGD("## createNewPkEncryptionJni(): success - OLM encryption created");
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LOGD(
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"## createNewPkEncryptionJni(): encryptionPtr=%p (jlong)(intptr_t)encryptionPtr=%lld",
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encryptionPtr, (jlong)(intptr_t)encryptionPtr
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);
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}
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if (errorMessage)
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{
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// release the allocated data
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if (encryptionPtr)
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{
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olm_clear_pk_encryption(encryptionPtr);
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free(encryptionPtr);
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}
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env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
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}
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return (jlong)(intptr_t)encryptionPtr;
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}
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JNIEXPORT void OLM_PK_ENCRYPTION_FUNC_DEF(releasePkEncryptionJni)(JNIEnv *env, jobject thiz)
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{
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LOGD("## releasePkEncryptionJni(): IN");
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OlmPkEncryption* encryptionPtr = getPkEncryptionInstanceId(env, thiz);
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if (!encryptionPtr)
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{
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LOGE(" ## releasePkEncryptionJni(): failure - invalid Encryption ptr=NULL");
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}
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else
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{
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LOGD(" ## releasePkEncryptionJni(): encryptionPtr=%p", encryptionPtr);
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olm_clear_pk_encryption(encryptionPtr);
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LOGD(" ## releasePkEncryptionJni(): IN");
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// even if free(NULL) does not crash, logs are performed for debug
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// purpose
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free(encryptionPtr);
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LOGD(" ## releasePkEncryptionJni(): OUT");
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}
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}
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JNIEXPORT void OLM_PK_ENCRYPTION_FUNC_DEF(setRecipientKeyJni)(
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JNIEnv *env, jobject thiz, jbyteArray aKeyBuffer
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) {
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const char *errorMessage = NULL;
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jbyte *keyPtr = NULL;
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OlmPkEncryption *encryptionPtr = getPkEncryptionInstanceId(env, thiz);
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if (!encryptionPtr)
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{
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LOGE(" ## pkSetRecipientKeyJni(): failure - invalid Encryption ptr=NULL");
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}
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else if (!aKeyBuffer)
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{
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LOGE(" ## pkSetRecipientKeyJni(): failure - invalid key");
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errorMessage = "invalid key";
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}
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else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
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{
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LOGE(" ## pkSetRecipientKeyJni(): failure - key JNI allocation OOM");
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errorMessage = "key JNI allocation OOM";
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}
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else
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{
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if (olm_pk_encryption_set_recipient_key(encryptionPtr, keyPtr, (size_t)env->GetArrayLength(aKeyBuffer)) == olm_error())
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{
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errorMessage = olm_pk_encryption_last_error(encryptionPtr);
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LOGE(
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" ## pkSetRecipientKeyJni(): failure - olm_pk_encryption_set_recipient_key Msg=%s",
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errorMessage
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);
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}
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}
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if (keyPtr)
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{
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env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
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}
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if (errorMessage)
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{
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env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
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}
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}
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JNIEXPORT jbyteArray OLM_PK_ENCRYPTION_FUNC_DEF(encryptJni)(
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JNIEnv *env, jobject thiz, jbyteArray aPlaintextBuffer, jobject aEncryptedMsg
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) {
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jbyteArray encryptedMsgRet = 0;
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const char* errorMessage = NULL;
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jbyte *plaintextPtr = NULL;
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jboolean plaintextIsCopied = JNI_FALSE;
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OlmPkEncryption *encryptionPtr = getPkEncryptionInstanceId(env, thiz);
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jclass encryptedMsgJClass = 0;
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jfieldID macFieldId;
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jfieldID ephemeralFieldId;
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if (!encryptionPtr)
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{
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LOGE(" ## pkEncryptJni(): failure - invalid Encryption ptr=NULL");
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}
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else if (!aPlaintextBuffer)
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{
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LOGE(" ## pkEncryptJni(): failure - invalid clear message");
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errorMessage = "invalid clear message";
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}
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else if (!(plaintextPtr = env->GetByteArrayElements(aPlaintextBuffer, &plaintextIsCopied)))
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{
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LOGE(" ## pkEncryptJni(): failure - plaintext JNI allocation OOM");
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errorMessage = "plaintext JNI allocation OOM";
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}
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else if (!(encryptedMsgJClass = env->GetObjectClass(aEncryptedMsg)))
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{
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LOGE(" ## pkEncryptJni(): failure - unable to get encrypted message class");
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errorMessage = "unable to get encrypted message class";
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}
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else if (!(macFieldId = env->GetFieldID(encryptedMsgJClass, "mMac", "Ljava/lang/String;")))
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{
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LOGE("## pkEncryptJni(): failure - unable to get MAC field");
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errorMessage = "unable to get MAC field";
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}
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else if (!(ephemeralFieldId = env->GetFieldID(encryptedMsgJClass, "mEphemeralKey", "Ljava/lang/String;")))
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{
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LOGE("## pkEncryptJni(): failure - unable to get ephemeral key field");
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errorMessage = "unable to get ephemeral key field";
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}
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else
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{
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size_t plaintextLength = (size_t)env->GetArrayLength(aPlaintextBuffer);
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size_t ciphertextLength = olm_pk_ciphertext_length(encryptionPtr, plaintextLength);
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size_t macLength = olm_pk_mac_length(encryptionPtr);
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size_t ephemeralLength = olm_pk_key_length();
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uint8_t *ciphertextPtr = NULL, *macPtr = NULL, *ephemeralPtr = NULL;
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size_t randomLength = olm_pk_encrypt_random_length(encryptionPtr);
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uint8_t *randomBuffPtr = NULL;
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LOGD("## pkEncryptJni(): randomLength=%lu",static_cast<long unsigned int>(randomLength));
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if (!(ciphertextPtr = (uint8_t*)malloc(ciphertextLength)))
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{
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LOGE("## pkEncryptJni(): failure - ciphertext JNI allocation OOM");
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errorMessage = "ciphertext JNI allocation OOM";
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}
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else if (!(macPtr = (uint8_t*)malloc(macLength + 1)))
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{
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LOGE("## pkEncryptJni(): failure - MAC JNI allocation OOM");
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errorMessage = "MAC JNI allocation OOM";
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}
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else if (!(ephemeralPtr = (uint8_t*)malloc(ephemeralLength + 1)))
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{
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LOGE("## pkEncryptJni(): failure: ephemeral key JNI allocation OOM");
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errorMessage = "ephemeral JNI allocation OOM";
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}
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else if (!setRandomInBuffer(env, &randomBuffPtr, randomLength))
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{
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LOGE("## pkEncryptJni(): failure - random buffer init");
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errorMessage = "random buffer init";
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}
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else
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{
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macPtr[macLength] = '\0';
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ephemeralPtr[ephemeralLength] = '\0';
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size_t returnValue = olm_pk_encrypt(
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encryptionPtr,
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plaintextPtr, plaintextLength,
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ciphertextPtr, ciphertextLength,
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macPtr, macLength,
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ephemeralPtr, ephemeralLength,
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randomBuffPtr, randomLength
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);
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if (returnValue == olm_error())
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{
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errorMessage = olm_pk_encryption_last_error(encryptionPtr);
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LOGE("## pkEncryptJni(): failure - olm_pk_encrypt Msg=%s", errorMessage);
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}
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else
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{
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encryptedMsgRet = env->NewByteArray(ciphertextLength);
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env->SetByteArrayRegion(
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encryptedMsgRet, 0, ciphertextLength, (jbyte*)ciphertextPtr
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);
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jstring macStr = env->NewStringUTF((char*)macPtr);
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env->SetObjectField(aEncryptedMsg, macFieldId, macStr);
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jstring ephemeralStr = env->NewStringUTF((char*)ephemeralPtr);
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env->SetObjectField(aEncryptedMsg, ephemeralFieldId, ephemeralStr);
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}
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}
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if (randomBuffPtr)
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{
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memset(randomBuffPtr, 0, randomLength);
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free(randomBuffPtr);
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}
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if (ephemeralPtr)
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{
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free(ephemeralPtr);
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}
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if (macPtr)
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{
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free(macPtr);
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}
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if (ciphertextPtr)
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{
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free(ciphertextPtr);
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}
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}
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if (plaintextPtr)
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{
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if (plaintextIsCopied)
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{
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memset(plaintextPtr, 0, (size_t)env->GetArrayLength(aPlaintextBuffer));
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}
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env->ReleaseByteArrayElements(aPlaintextBuffer, plaintextPtr, JNI_ABORT);
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}
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if (errorMessage)
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{
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env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
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}
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return encryptedMsgRet;
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}
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OlmPkDecryption * initializePkDecryptionMemory()
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{
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size_t decryptionSize = olm_pk_decryption_size();
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OlmPkDecryption *decryptionPtr = (OlmPkDecryption *)malloc(decryptionSize);
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if (decryptionPtr)
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{
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// init decryption object
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decryptionPtr = olm_pk_decryption(decryptionPtr);
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LOGD(
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"## initializePkDecryptionMemory(): success - OLM decryption size=%lu",
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static_cast<long unsigned int>(decryptionSize)
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);
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}
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else
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{
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LOGE("## initializePkDecryptionMemory(): failure - OOM");
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}
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return decryptionPtr;
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}
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JNIEXPORT jlong OLM_PK_DECRYPTION_FUNC_DEF(createNewPkDecryptionJni)(JNIEnv *env, jobject thiz)
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{
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const char* errorMessage = NULL;
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OlmPkDecryption *decryptionPtr = initializePkDecryptionMemory();
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// init encryption memory allocation
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if (!decryptionPtr)
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{
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LOGE("## createNewPkDecryptionJni(): failure - init decryption OOM");
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errorMessage = "init decryption OOM";
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}
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else
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{
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LOGD("## createNewPkDecryptionJni(): success - OLM decryption created");
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LOGD(
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"## createNewPkDecryptionJni(): decryptionPtr=%p (jlong)(intptr_t)decryptionPtr=%lld",
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decryptionPtr, (jlong)(intptr_t)decryptionPtr
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);
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}
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if (errorMessage)
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{
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// release the allocated data
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if (decryptionPtr)
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{
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olm_clear_pk_decryption(decryptionPtr);
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free(decryptionPtr);
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}
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env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
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}
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return (jlong)(intptr_t)decryptionPtr;
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}
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JNIEXPORT void OLM_PK_DECRYPTION_FUNC_DEF(releasePkDecryptionJni)(JNIEnv *env, jobject thiz)
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{
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LOGD("## releasePkDecryptionJni(): IN");
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OlmPkDecryption* decryptionPtr = getPkDecryptionInstanceId(env, thiz);
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if (!decryptionPtr)
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{
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LOGE(" ## releasePkDecryptionJni(): failure - invalid Decryption ptr=NULL");
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}
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else
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{
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LOGD(" ## releasePkDecryptionJni(): decryptionPtr=%p", encryptionPtr);
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olm_clear_pk_decryption(decryptionPtr);
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LOGD(" ## releasePkDecryptionJni(): IN");
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// even if free(NULL) does not crash, logs are performed for debug
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// purpose
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free(decryptionPtr);
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LOGD(" ## releasePkDecryptionJni(): OUT");
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}
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}
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JNIEXPORT jbyteArray OLM_PK_DECRYPTION_FUNC_DEF(generateKeyJni)(JNIEnv *env, jobject thiz)
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{
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size_t randomLength = olm_pk_generate_key_random_length();
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uint8_t *randomBuffPtr = NULL;
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jbyteArray publicKeyRet = 0;
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uint8_t *publicKeyPtr = NULL;
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size_t publicKeyLength = olm_pk_key_length();
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const char* errorMessage = NULL;
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OlmPkDecryption *decryptionPtr = getPkDecryptionInstanceId(env, thiz);
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if (!decryptionPtr)
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{
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LOGE(" ## pkGenerateKeyJni(): failure - invalid Decryption ptr=NULL");
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errorMessage = "invalid Decryption ptr=NULL";
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}
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else if (!setRandomInBuffer(env, &randomBuffPtr, randomLength))
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{
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LOGE("## pkGenerateKeyJni(): failure - random buffer init");
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errorMessage = "random buffer init";
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}
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else if (!(publicKeyPtr = static_cast<uint8_t*>(malloc(publicKeyLength))))
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{
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LOGE("## pkGenerateKeyJni(): failure - public key allocation OOM");
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errorMessage = "public key allocation OOM";
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}
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else
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{
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if (olm_pk_generate_key(decryptionPtr, publicKeyPtr, publicKeyLength, randomBuffPtr, randomLength) == olm_error())
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{
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errorMessage = olm_pk_decryption_last_error(decryptionPtr);
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LOGE("## pkGenerateKeyJni(): failure - olm_pk_generate_key Msg=%s", errorMessage);
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}
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else
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{
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publicKeyRet = env->NewByteArray(publicKeyLength);
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env->SetByteArrayRegion(publicKeyRet, 0, publicKeyLength, (jbyte*)publicKeyPtr);
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LOGD("## pkGenerateKeyJni(): public key generated");
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}
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}
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if (randomBuffPtr)
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{
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memset(randomBuffPtr, 0, randomLength);
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free(randomBuffPtr);
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}
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if (errorMessage)
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{
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// release the allocated data
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if (decryptionPtr)
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{
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olm_clear_pk_decryption(decryptionPtr);
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free(decryptionPtr);
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}
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env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
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}
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return publicKeyRet;
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}
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JNIEXPORT jbyteArray OLM_PK_DECRYPTION_FUNC_DEF(decryptJni)(
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JNIEnv *env, jobject thiz, jobject aEncryptedMsg
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) {
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const char* errorMessage = NULL;
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OlmPkDecryption *decryptionPtr = getPkDecryptionInstanceId(env, thiz);
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jclass encryptedMsgJClass = 0;
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jstring ciphertextJstring = 0;
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jstring macJstring = 0;
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jstring ephemeralKeyJstring = 0;
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jfieldID ciphertextFieldId;
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jfieldID macFieldId;
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jfieldID ephemeralKeyFieldId;
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const char *ciphertextPtr = NULL;
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const char *macPtr = NULL;
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const char *ephemeralKeyPtr = NULL;
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jbyteArray decryptedMsgRet = 0;
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if (!decryptionPtr)
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{
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LOGE(" ## pkDecryptJni(): failure - invalid Decryption ptr=NULL");
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errorMessage = "invalid Decryption ptr=NULL";
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}
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else if (!aEncryptedMsg)
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{
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LOGE(" ## pkDecryptJni(): failure - invalid encrypted message");
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errorMessage = "invalid encrypted message";
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}
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else if (!(encryptedMsgJClass = env->GetObjectClass(aEncryptedMsg)))
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{
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LOGE("## pkDecryptJni(): failure - unable to get encrypted message class");
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errorMessage = "unable to get encrypted message class";
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}
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else if (!(ciphertextFieldId = env->GetFieldID(encryptedMsgJClass,"mCipherText","Ljava/lang/String;")))
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{
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LOGE("## pkDecryptJni(): failure - unable to get message field");
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errorMessage = "unable to get message field";
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}
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else if (!(ciphertextJstring = (jstring)env->GetObjectField(aEncryptedMsg, ciphertextFieldId)))
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{
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LOGE("## pkDecryptJni(): failure - no ciphertext");
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errorMessage = "no ciphertext";
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}
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else if (!(ciphertextPtr = env->GetStringUTFChars(ciphertextJstring, 0)))
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{
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LOGE("## pkDecryptJni(): failure - ciphertext JNI allocation OOM");
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errorMessage = "ciphertext JNI allocation OOM";
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}
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else if (!(ciphertextJstring = (jstring)env->GetObjectField(aEncryptedMsg, ciphertextFieldId)))
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{
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LOGE("## pkDecryptJni(): failure - no ciphertext");
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errorMessage = "no ciphertext";
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}
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else if (!(ciphertextPtr = env->GetStringUTFChars(ciphertextJstring, 0)))
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{
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LOGE("## decryptMessageJni(): failure - ciphertext JNI allocation OOM");
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errorMessage = "ciphertext JNI allocation OOM";
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}
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else if (!(macFieldId = env->GetFieldID(encryptedMsgJClass,"mMac","Ljava/lang/String;")))
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{
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LOGE("## pkDecryptJni(): failure - unable to get MAC field");
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errorMessage = "unable to get MAC field";
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}
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else if (!(macJstring = (jstring)env->GetObjectField(aEncryptedMsg, macFieldId)))
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{
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LOGE("## pkDecryptJni(): failure - no MAC");
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errorMessage = "no MAC";
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}
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else if (!(macPtr = env->GetStringUTFChars(macJstring, 0)))
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{
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LOGE("## pkDecryptJni(): failure - MAC JNI allocation OOM");
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errorMessage = "ciphertext JNI allocation OOM";
|
|
}
|
|
else if (!(ephemeralKeyFieldId = env->GetFieldID(encryptedMsgJClass,"mEphemeralKey","Ljava/lang/String;")))
|
|
{
|
|
LOGE("## pkDecryptJni(): failure - unable to get ephemeral key field");
|
|
errorMessage = "unable to get ephemeral key field";
|
|
}
|
|
else if (!(ephemeralKeyJstring = (jstring)env->GetObjectField(aEncryptedMsg, ephemeralKeyFieldId)))
|
|
{
|
|
LOGE("## pkDecryptJni(): failure - no ephemeral key");
|
|
errorMessage = "no ephemeral key";
|
|
}
|
|
else if (!(ephemeralKeyPtr = env->GetStringUTFChars(ephemeralKeyJstring, 0)))
|
|
{
|
|
LOGE("## pkDecryptJni(): failure - ephemeral key JNI allocation OOM");
|
|
errorMessage = "ephemeral key JNI allocation OOM";
|
|
}
|
|
else
|
|
{
|
|
size_t maxPlaintextLength = olm_pk_max_plaintext_length(
|
|
decryptionPtr,
|
|
(size_t)env->GetStringUTFLength(ciphertextJstring)
|
|
);
|
|
uint8_t *plaintextPtr = NULL;
|
|
uint8_t *tempCiphertextPtr = NULL;
|
|
size_t ciphertextLength = (size_t)env->GetStringUTFLength(ciphertextJstring);
|
|
if (!(plaintextPtr = (uint8_t*)malloc(maxPlaintextLength)))
|
|
{
|
|
LOGE("## pkDecryptJni(): failure - plaintext JNI allocation OOM");
|
|
errorMessage = "plaintext JNI allocation OOM";
|
|
}
|
|
else if (!(tempCiphertextPtr = (uint8_t*)malloc(ciphertextLength)))
|
|
{
|
|
LOGE("## pkDecryptJni(): failure - temp ciphertext JNI allocation OOM");
|
|
}
|
|
else
|
|
{
|
|
memcpy(tempCiphertextPtr, ciphertextPtr, ciphertextLength);
|
|
size_t plaintextLength = olm_pk_decrypt(
|
|
decryptionPtr,
|
|
ephemeralKeyPtr, (size_t)env->GetStringUTFLength(ephemeralKeyJstring),
|
|
macPtr, (size_t)env->GetStringUTFLength(macJstring),
|
|
tempCiphertextPtr, ciphertextLength,
|
|
plaintextPtr, maxPlaintextLength
|
|
);
|
|
if (plaintextLength == olm_error())
|
|
{
|
|
errorMessage = olm_pk_decryption_last_error(decryptionPtr);
|
|
LOGE("## pkDecryptJni(): failure - olm_pk_decrypt Msg=%s", errorMessage);
|
|
}
|
|
else
|
|
{
|
|
decryptedMsgRet = env->NewByteArray(plaintextLength);
|
|
env->SetByteArrayRegion(decryptedMsgRet, 0, plaintextLength, (jbyte*)plaintextPtr);
|
|
LOGD(
|
|
"## pkDecryptJni(): success returnedLg=%lu OK",
|
|
static_cast<long unsigned int>(plaintextLength)
|
|
);
|
|
}
|
|
}
|
|
|
|
if (tempCiphertextPtr)
|
|
{
|
|
free(tempCiphertextPtr);
|
|
}
|
|
if (plaintextPtr)
|
|
{
|
|
memset(plaintextPtr, 0, maxPlaintextLength);
|
|
free(plaintextPtr);
|
|
}
|
|
}
|
|
|
|
if (ciphertextPtr)
|
|
{
|
|
env->ReleaseStringUTFChars(ciphertextJstring, ciphertextPtr);
|
|
}
|
|
if (macPtr)
|
|
{
|
|
env->ReleaseStringUTFChars(macJstring, macPtr);
|
|
}
|
|
if (ephemeralKeyPtr)
|
|
{
|
|
env->ReleaseStringUTFChars(ephemeralKeyJstring, ephemeralKeyPtr);
|
|
}
|
|
|
|
if (errorMessage)
|
|
{
|
|
env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
|
|
}
|
|
|
|
return decryptedMsgRet;
|
|
}
|