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more and improved buffer sanitising for Android bindings

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This commit is contained in:
Hubert Chathi 2018-10-17 15:50:36 -04:00
parent c4c3055f83
commit 1c7ff7f48d
11 changed files with 99 additions and 22 deletions
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9
android/olm-sdk/src/main/java/org/matrix/olm/OlmAccount.java
View file

@ -26,6 +26,7 @@ import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Map;
/**
@ -290,9 +291,9 @@ public class OlmAccount extends CommonSerializeUtils implements Serializable {
String result = null;
if (null != aMessage) {
byte[] utf8String = null;
try {
byte[] utf8String = aMessage.getBytes("UTF-8");
utf8String = aMessage.getBytes("UTF-8");
if (null != utf8String) {
byte[] signedMessage = signMessageJni(utf8String);
@ -302,6 +303,10 @@ public class OlmAccount extends CommonSerializeUtils implements Serializable {
}
} catch (Exception e) {
throw new OlmException(OlmException.EXCEPTION_CODE_ACCOUNT_SIGN_MESSAGE, e.getMessage());
} finally {
if (null != utf8String) {
Arrays.fill(utf8String, (byte) 0);
}
}
}

7
android/olm-sdk/src/main/java/org/matrix/olm/OlmInboundGroupSession.java
View file

@ -77,10 +77,16 @@ public class OlmInboundGroupSession extends CommonSerializeUtils implements Seri
Log.e(LOG_TAG, "## initInboundGroupSession(): invalid session key");
throw new OlmException(OlmException.EXCEPTION_CODE_INIT_INBOUND_GROUP_SESSION, "invalid session key");
} else {
byte[] sessionBuffer = null;
try {
sessionBuffer = aSessionKey.getBytes("UTF-8");
mNativeId = createNewSessionJni(aSessionKey.getBytes("UTF-8"), isImported);
} catch (Exception e) {
throw new OlmException(OlmException.EXCEPTION_CODE_INIT_INBOUND_GROUP_SESSION, e.getMessage());
} finally {
if (null != sessionBuffer) {
Arrays.fill(sessionBuffer, (byte) 0);
}
}
}
}
@ -216,6 +222,7 @@ public class OlmInboundGroupSession extends CommonSerializeUtils implements Seri
if (null != bytesBuffer) {
result = new String(bytesBuffer, "UTF-8");
Arrays.fill(bytesBuffer, (byte) 0);
}
} catch (Exception e) {
Log.e(LOG_TAG, "## export() failed " + e.getMessage());

5
android/olm-sdk/src/main/java/org/matrix/olm/OlmOutboundGroupSession.java
View file

@ -142,7 +142,10 @@ public class OlmOutboundGroupSession extends CommonSerializeUtils implements Ser
*/
public String sessionKey() throws OlmException {
try {
return new String(sessionKeyJni(), "UTF-8");
byte[] sessionKeyBuffer = sessionKeyJni();
String ret = new String(sessionKeyBuffer, "UTF-8");
Arrays.fill(sessionKeyBuffer, (byte) 0);
return ret;
} catch (Exception e) {
Log.e(LOG_TAG, "## sessionKey() failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_KEY, e.getMessage());

5
android/olm-sdk/src/main/java/org/matrix/olm/OlmPkDecryption.java
View file

@ -68,14 +68,15 @@ public class OlmPkDecryption {
return null;
}
byte[] plaintextBuffer = decryptJni(aMessage);
try {
byte[] plaintextBuffer = decryptJni(aMessage);
String plaintext = new String(plaintextBuffer, "UTF-8");
Arrays.fill(plaintextBuffer, (byte) 0);
return plaintext;
} catch (Exception e) {
Log.e(LOG_TAG, "## pkDecrypt(): failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_DECRYPT, e.getMessage());
} finally {
Arrays.fill(plaintextBuffer, (byte) 0);
}
}

8
android/olm-sdk/src/main/java/org/matrix/olm/OlmPkEncryption.java
View file

@ -73,10 +73,10 @@ public class OlmPkEncryption {
OlmPkMessage encryptedMsgRetValue = new OlmPkMessage();
byte[] plaintextBuffer = null;
try {
byte[] plaintextBuffer = aPlaintext.getBytes("UTF-8");
plaintextBuffer = aPlaintext.getBytes("UTF-8");
byte[] ciphertextBuffer = encryptJni(plaintextBuffer, encryptedMsgRetValue);
Arrays.fill(plaintextBuffer, (byte) 0);
if (null != ciphertextBuffer) {
encryptedMsgRetValue.mCipherText = new String(ciphertextBuffer, "UTF-8");
@ -84,6 +84,10 @@ public class OlmPkEncryption {
} catch (Exception e) {
Log.e(LOG_TAG, "## pkEncrypt(): failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_PK_ENCRYPTION_ENCRYPT, e.getMessage());
} finally {
if (null != plaintextBuffer) {
Arrays.fill(plaintextBuffer, (byte) 0);
}
}
return encryptedMsgRetValue;

17
android/olm-sdk/src/main/java/org/matrix/olm/OlmUtility.java
View file

@ -23,6 +23,7 @@ import android.util.Log;
import org.json.JSONObject;
import java.security.SecureRandom;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
@ -81,17 +82,23 @@ public class OlmUtility {
*/
public void verifyEd25519Signature(String aSignature, String aFingerprintKey, String aMessage) throws OlmException {
String errorMessage;
byte[] messageBuffer = null;
try {
if (TextUtils.isEmpty(aSignature) || TextUtils.isEmpty(aFingerprintKey) || TextUtils.isEmpty(aMessage)) {
Log.e(LOG_TAG, "## verifyEd25519Signature(): invalid input parameters");
errorMessage = "JAVA sanity check failure - invalid input parameters";
} else {
errorMessage = verifyEd25519SignatureJni(aSignature.getBytes("UTF-8"), aFingerprintKey.getBytes("UTF-8"), aMessage.getBytes("UTF-8"));
messageBuffer = aMessage.getBytes("UTF-8");
errorMessage = verifyEd25519SignatureJni(aSignature.getBytes("UTF-8"), aFingerprintKey.getBytes("UTF-8"), messageBuffer);
}
} catch (Exception e) {
Log.e(LOG_TAG, "## verifyEd25519Signature(): failed " + e.getMessage());
errorMessage = e.getMessage();
} finally {
if (messageBuffer != null) {
Arrays.fill(messageBuffer, (byte) 0);
}
}
if (!TextUtils.isEmpty(errorMessage)) {
@ -119,10 +126,16 @@ public class OlmUtility {
String hashRetValue = null;
if (null != aMessageToHash) {
byte[] messageBuffer = null;
try {
hashRetValue = new String(sha256Jni(aMessageToHash.getBytes("UTF-8")), "UTF-8");
messageBuffer = aMessageToHash.getBytes("UTF-8");
hashRetValue = new String(sha256Jni(messageBuffer), "UTF-8");
} catch (Exception e) {
Log.e(LOG_TAG, "## sha256(): failed " + e.getMessage());
} finally {
if (null != messageBuffer) {
Arrays.fill(messageBuffer, (byte) 0);
}
}
}

14
android/olm-sdk/src/main/jni/olm_account.cpp
View file

@ -528,6 +528,7 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
const char* errorMessage = NULL;
jbyteArray pickledDataRetValue = 0;
jbyte* keyPtr = NULL;
jboolean keyIsCopied = JNI_FALSE;
OlmAccount* accountPtr = NULL;
LOGD("## serializeJni(): IN");
@ -542,7 +543,7 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
LOGE(" ## serializeJni(): failure - invalid account ptr");
errorMessage = "invalid account ptr";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, NULL)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyIsCopied)))
{
LOGE(" ## serializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "keyPtr JNI allocation OOM";
@ -586,6 +587,9 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
// free alloc
if (keyPtr)
{
if (keyIsCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}
@ -610,6 +614,7 @@ JNIEXPORT jlong OLM_ACCOUNT_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz,
OlmAccount* accountPtr = NULL;
jbyte* keyPtr = NULL;
jboolean keyIsCopied = JNI_FALSE;
jbyte* pickledPtr = NULL;
LOGD("## deserializeJni(): IN");
@ -629,7 +634,7 @@ JNIEXPORT jlong OLM_ACCOUNT_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz,
LOGE(" ## deserializeJni(): failure - account failure OOM");
errorMessage = "account failure OOM";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyIsCopied)))
{
LOGE(" ## deserializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "keyPtr JNI allocation OOM";
@ -665,6 +670,9 @@ JNIEXPORT jlong OLM_ACCOUNT_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz,
// free alloc
if (keyPtr)
{
if (keyIsCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}
@ -684,4 +692,4 @@ JNIEXPORT jlong OLM_ACCOUNT_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz,
}
return (jlong)(intptr_t)accountPtr;
}
}

18
android/olm-sdk/src/main/jni/olm_inbound_group_session.cpp
View file

@ -62,6 +62,7 @@ JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(createNewSessionJni)(JNIEnv *
const char* errorMessage = NULL;
OlmInboundGroupSession* sessionPtr = NULL;
jbyte* sessionKeyPtr = NULL;
jboolean sessionWasCopied = JNI_FALSE;
size_t sessionSize = olm_inbound_group_session_size();
LOGD("## createNewSessionJni(): inbound group session IN");
@ -81,7 +82,7 @@ JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(createNewSessionJni)(JNIEnv *
LOGE(" ## createNewSessionJni(): failure - invalid aSessionKey");
errorMessage = "invalid aSessionKey";
}
else if (!(sessionKeyPtr = env->GetByteArrayElements(aSessionKeyBuffer, 0)))
else if (!(sessionKeyPtr = env->GetByteArrayElements(aSessionKeyBuffer, &sessionWasCopied)))
{
LOGE(" ## createNewSessionJni(): failure - session key JNI allocation OOM");
errorMessage = "Session key JNI allocation OOM";
@ -119,6 +120,9 @@ JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(createNewSessionJni)(JNIEnv *
if (sessionKeyPtr)
{
if (sessionWasCopied) {
memset(sessionKeyPtr, 0, (size_t)env->GetArrayLength(aSessionKeyBuffer));
}
env->ReleaseByteArrayElements(aSessionKeyBuffer, sessionKeyPtr, JNI_ABORT);
}
@ -474,6 +478,7 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *en
jbyteArray pickledDataRet = 0;
jbyte* keyPtr = NULL;
jboolean keyWasCopied = JNI_FALSE;
OlmInboundGroupSession* sessionPtr = getInboundGroupSessionInstanceId(env, thiz);
LOGD("## inbound group session serializeJni(): IN");
@ -488,7 +493,7 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *en
LOGE(" ## serializeJni(): failure - invalid key");
errorMessage = "invalid key";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyWasCopied)))
{
LOGE(" ## serializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "keyPtr JNI allocation OOM";
@ -533,6 +538,9 @@ JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *en
// free alloc
if (keyPtr)
{
if (keyWasCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}
@ -558,6 +566,7 @@ JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env,
OlmInboundGroupSession* sessionPtr = NULL;
size_t sessionSize = olm_inbound_group_session_size();
jbyte* keyPtr = NULL;
jboolean keyWasCopied = JNI_FALSE;
jbyte* pickledPtr = NULL;
LOGD("## deserializeJni(): IN");
@ -582,7 +591,7 @@ JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env,
LOGE(" ## deserializeJni(): failure - serialized data");
errorMessage = "serialized data";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyWasCopied)))
{
LOGE(" ## deserializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "keyPtr JNI allocation OOM";
@ -620,6 +629,9 @@ JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env,
// free alloc
if (keyPtr)
{
if (keyWasCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}

12
android/olm-sdk/src/main/jni/olm_outbound_group_session.cpp
View file

@ -387,6 +387,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *e
jbyteArray returnValue = 0;
jbyte* keyPtr = NULL;
jboolean keyWasCopied = JNI_FALSE;
OlmOutboundGroupSession* sessionPtr = NULL;
LOGD("## outbound group session serializeJni(): IN");
@ -401,7 +402,7 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *e
LOGE(" ## serializeJni(): failure - invalid key");
errorMessage = "invalid key";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyWasCopied)))
{
LOGE(" ## serializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "keyPtr JNI allocation OOM";
@ -446,6 +447,9 @@ JNIEXPORT jbyteArray OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *e
// free alloc
if (keyPtr)
{
if (keyWasCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}
@ -471,6 +475,7 @@ JNIEXPORT jlong OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env,
OlmOutboundGroupSession* sessionPtr = NULL;
jbyte* keyPtr = NULL;
jboolean keyWasCopied = JNI_FALSE;
jbyte* pickledPtr = NULL;
LOGD("## deserializeJni(): IN");
@ -495,7 +500,7 @@ JNIEXPORT jlong OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env,
LOGE(" ## deserializeJni(): failure - serialized data");
errorMessage = "invalid serialized data";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyWasCopied)))
{
LOGE(" ## deserializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "keyPtr JNI allocation OOM";
@ -532,6 +537,9 @@ JNIEXPORT jlong OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env,
// free alloc
if (keyPtr)
{
if (keyWasCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}

12
android/olm-sdk/src/main/jni/olm_session.cpp
View file

@ -810,6 +810,7 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
jbyteArray returnValue = 0;
jbyte* keyPtr = NULL;
jboolean keyWasCopied = JNI_FALSE;
OlmSession* sessionPtr = getSessionInstanceId(env, thiz);
LOGD("## serializeJni(): IN");
@ -824,7 +825,7 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
LOGE(" ## serializeJni(): failure - invalid key");
errorMessage = "invalid key";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyWasCopied)))
{
LOGE(" ## serializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "ikeyPtr JNI allocation OOM";
@ -869,6 +870,9 @@ JNIEXPORT jbyteArray OLM_SESSION_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thi
// free alloc
if (keyPtr)
{
if (keyWasCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}
@ -892,6 +896,7 @@ JNIEXPORT jlong OLM_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz,
const char* errorMessage = NULL;
OlmSession* sessionPtr = initializeSessionMemory();
jbyte* keyPtr = NULL;
jboolean keyWasCopied = JNI_FALSE;
jbyte* pickledPtr = NULL;
LOGD("## deserializeJni(): IN");
@ -911,7 +916,7 @@ JNIEXPORT jlong OLM_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz,
LOGE(" ## deserializeJni(): failure - serialized data");
errorMessage = "serialized data";
}
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, &keyWasCopied)))
{
LOGE(" ## deserializeJni(): failure - keyPtr JNI allocation OOM");
errorMessage = "keyPtr JNI allocation OOM";
@ -947,6 +952,9 @@ JNIEXPORT jlong OLM_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz,
// free alloc
if (keyPtr)
{
if (keyWasCopied) {
memset(keyPtr, 0, (size_t)env->GetArrayLength(aKeyBuffer));
}
env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
}

14
android/olm-sdk/src/main/jni/olm_utility.cpp
View file

@ -90,6 +90,7 @@ JNIEXPORT jstring OLM_UTILITY_FUNC_DEF(verifyEd25519SignatureJni)(JNIEnv *env, j
jbyte* signaturePtr = NULL;
jbyte* keyPtr = NULL;
jbyte* messagePtr = NULL;
jboolean messageWasCopied = JNI_FALSE;
LOGD("## verifyEd25519SignatureJni(): IN");
@ -109,7 +110,7 @@ JNIEXPORT jstring OLM_UTILITY_FUNC_DEF(verifyEd25519SignatureJni)(JNIEnv *env, j
{
LOGE(" ## verifyEd25519SignatureJni(): failure - key JNI allocation OOM");
}
else if (!(messagePtr = env->GetByteArrayElements(aMessageBuffer, 0)))
else if (!(messagePtr = env->GetByteArrayElements(aMessageBuffer, &messageWasCopied)))
{
LOGE(" ## verifyEd25519SignatureJni(): failure - message JNI allocation OOM");
}
@ -152,6 +153,9 @@ JNIEXPORT jstring OLM_UTILITY_FUNC_DEF(verifyEd25519SignatureJni)(JNIEnv *env, j
if (messagePtr)
{
if (messageWasCopied) {
memset(messagePtr, 0, (size_t)env->GetArrayLength(aMessageBuffer));
}
env->ReleaseByteArrayElements(aMessageBuffer, messagePtr, JNI_ABORT);
}
@ -171,6 +175,7 @@ JNIEXPORT jbyteArray OLM_UTILITY_FUNC_DEF(sha256Jni)(JNIEnv *env, jobject thiz,
OlmUtility* utilityPtr = getUtilityInstanceId(env, thiz);
jbyte* messagePtr = NULL;
jboolean messageWasCopied = JNI_FALSE;
LOGD("## sha256Jni(): IN");
@ -182,7 +187,7 @@ JNIEXPORT jbyteArray OLM_UTILITY_FUNC_DEF(sha256Jni)(JNIEnv *env, jobject thiz,
{
LOGE(" ## sha256Jni(): failure - invalid message parameters ");
}
else if(!(messagePtr = env->GetByteArrayElements(aMessageToHashBuffer, 0)))
else if(!(messagePtr = env->GetByteArrayElements(aMessageToHashBuffer, &messageWasCopied)))
{
LOGE(" ## sha256Jni(): failure - message JNI allocation OOM");
}
@ -221,8 +226,11 @@ JNIEXPORT jbyteArray OLM_UTILITY_FUNC_DEF(sha256Jni)(JNIEnv *env, jobject thiz,
if (messagePtr)
{
if (messageWasCopied) {
memset(messagePtr, 0, (size_t)env->GetArrayLength(aMessageToHashBuffer));
}
env->ReleaseByteArrayElements(aMessageToHashBuffer, messagePtr, JNI_ABORT);
}
return sha256Ret;
}
}