Add serialization for outbound group session

10 files changed, 304 insertions, 10 deletions

diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmException.java b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
index 280dce1..d74f6e3 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
@@ -31,6 +31,8 @@ public class OlmException extends Exception {
     public static final int EXCEPTION_CODE_SESSION_DESERIALIZATION = 7;
     public static final int EXCEPTION_CODE_INIT_ACCOUNT_CREATION = 8;
     public static final int EXCEPTION_CODE_INIT_SESSION_CREATION = 9;
+    public static final int EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_SERIALIZATION = 10;
+    public static final int EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_DESERIALIZATION = 11;
 
     // exception human readable messages
     public static final String EXCEPTION_MSG_NEW_OUTBOUND_GROUP_SESSION = "failed to create a new outbound group Session";
@@ -39,7 +41,7 @@ public class OlmException extends Exception {
     public static final String EXCEPTION_MSG_INIT_INBOUND_GROUP_SESSION = "failed to initialize a new inbound group Session";
     public static final String EXCEPTION_MSG_INIT_NEW_ACCOUNT_DESERIALIZATION = "initNewAccount() failure";
     public static final String EXCEPTION_MSG_INIT_ACCOUNT_DESERIALIZATION = "initWithSerializedData() failure";
-    public static final String EXCEPTION_MSG_INVALID_PARAMS_DESERIALIZATION = "invalid deserialized parameters";
+    public static final String EXCEPTION_MSG_INVALID_PARAMS_DESERIALIZATION = "invalid de-serialized parameters";
     public static final String EXCEPTION_MSG_INIT_ACCOUNT_CREATION = "Account constructor failure";
     public static final String EXCEPTION_MSG_INIT_SESSION_CREATION = "Session constructor failure";
 
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmInboundGroupSession.java b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmInboundGroupSession.java
index d7d9a1c..e78e259 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmInboundGroupSession.java
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmInboundGroupSession.java
@@ -26,7 +26,7 @@ import android.util.Log;
 import java.io.Serializable;
 
 public class OlmInboundGroupSession implements Serializable {
-
+    private static final long serialVersionUID = -772028491251653253L;
     private static final String LOG_TAG = "OlmInboundGroupSession";
 
     /** session raw pointer value returned by JNI.<br>
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmManager.java b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmManager.java
index 55b9910..403b4b3 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmManager.java
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmManager.java
@@ -17,10 +17,17 @@
 package org.matrix.olm;
 
 
+import android.util.Log;
+
 public class OlmManager {
+    private static final String LOG_TAG = "OlmManager";
 
-    static {
-        java.lang.System.loadLibrary("olm");
+    public OlmManager() {
+        try {
+            java.lang.System.loadLibrary("olm");
+        } catch(UnsatisfiedLinkError e) {
+            Log.e(LOG_TAG,"Exception loadLibrary() - Msg="+e.getMessage());
+        }
     }
 
     /**
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmOutboundGroupSession.java b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmOutboundGroupSession.java
index 7c2c42b..7fdf405 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmOutboundGroupSession.java
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmOutboundGroupSession.java
@@ -18,8 +18,15 @@ package org.matrix.olm;
 
 
 import android.text.TextUtils;
+import android.util.Log;
 
-public class OlmOutboundGroupSession {
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+
+public class OlmOutboundGroupSession implements Serializable {
+    private static final long serialVersionUID = -3133097431283604416L;
     private static final String LOG_TAG = "OlmOutboundGroupSession";
 
     /** session raw pointer value returned by JNI.<br>
@@ -54,6 +61,120 @@ public class OlmOutboundGroupSession {
     }
 
     /**
+     * Kick off the serialization mechanism.
+     * @param aOutStream output stream for serializing
+     * @throws IOException
+     * @throws OlmException
+     */
+    private void writeObject(ObjectOutputStream aOutStream) throws IOException, OlmException {
+        aOutStream.defaultWriteObject();
+
+        // generate serialization key
+        String key = OlmUtility.getRandomKey();
+
+        // compute pickle string
+        StringBuffer errorMsg = new StringBuffer();
+        String pickledData = serializeDataWithKey(key, errorMsg);
+
+        if(null == pickledData) {
+            throw new OlmException(OlmException.EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_SERIALIZATION, String.valueOf(errorMsg));
+        } else {
+            aOutStream.writeObject(key);
+            aOutStream.writeObject(pickledData);
+        }
+    }
+
+    /**
+     * Kick off the deserialization mechanism.
+     * @param aInStream
+     * @throws IOException
+     * @throws ClassNotFoundException
+     * @throws OlmException
+     */
+    private void readObject(ObjectInputStream aInStream) throws IOException, ClassNotFoundException, OlmException {
+        aInStream.defaultReadObject();
+        StringBuffer errorMsg = new StringBuffer();
+
+        String key = (String) aInStream.readObject();
+        String pickledData = (String) aInStream.readObject();
+
+        if(TextUtils.isEmpty(key)) {
+            throw new OlmException(OlmException.EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_DESERIALIZATION, OlmException.EXCEPTION_MSG_INVALID_PARAMS_DESERIALIZATION+" key");
+
+        } else if(TextUtils.isEmpty(pickledData)) {
+            throw new OlmException(OlmException.EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_DESERIALIZATION, OlmException.EXCEPTION_MSG_INVALID_PARAMS_DESERIALIZATION+" pickle");
+
+        } else if(!initNewSession()) {
+            throw new OlmException(OlmException.EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_DESERIALIZATION, OlmException.EXCEPTION_MSG_INIT_NEW_ACCOUNT_DESERIALIZATION);
+
+        } else if(!initWithSerializedData(pickledData, key, errorMsg)) {
+            releaseSession(); // prevent memory leak
+            throw new OlmException(OlmException.EXCEPTION_CODE_OUTBOUND_GROUP_SESSION_DESERIALIZATION, String.valueOf(errorMsg));
+
+        } else {
+            Log.d(LOG_TAG,"## readObject(): success");
+        }
+    }
+
+    /**
+     * Return a session as a base64 string.<br>
+     * The account is serialized and encrypted with aKey.
+     * In case of failure, an error human readable
+     * description is provide in aErrorMsg.
+     * @param aKey encryption key
+     * @param aErrorMsg error message description
+     * @return pickled base64 string if operation succeed, null otherwise
+     */
+    private String serializeDataWithKey(String aKey, StringBuffer aErrorMsg) {
+        String pickleRetValue = null;
+
+        // sanity check
+        if(null == aErrorMsg) {
+            Log.e(LOG_TAG,"## serializeDataWithKey(): invalid parameter - aErrorMsg=null");
+        } else if(TextUtils.isEmpty(aKey)) {
+            aErrorMsg.append("Invalid input parameters in serializeDataWithKey()");
+        } else {
+            aErrorMsg.setLength(0);
+            pickleRetValue = serializeDataWithKeyJni(aKey, aErrorMsg);
+        }
+
+        return pickleRetValue;
+    }
+    private native String serializeDataWithKeyJni(String aKey, StringBuffer aErrorMsg);
+
+
+    /**
+     * Loads an account from a pickled base64 string.<br>
+     * See {@link #serializeDataWithKey(String, StringBuffer)}
+     * @param aSerializedData pickled account in a base64 string format
+     * @param aKey key used to encrypted
+     * @param aErrorMsg error message description
+     * @return true if operation succeed, false otherwise
+     */
+    private boolean initWithSerializedData(String aSerializedData, String aKey, StringBuffer aErrorMsg) {
+        boolean retCode = false;
+        String jniError;
+
+        if(null == aErrorMsg) {
+            Log.e(LOG_TAG, "## initWithSerializedData(): invalid input error parameter");
+        } else {
+            aErrorMsg.setLength(0);
+
+            if (TextUtils.isEmpty(aSerializedData) || TextUtils.isEmpty(aKey)) {
+                Log.e(LOG_TAG, "## initWithSerializedData(): invalid input parameters");
+            } else if (null == (jniError = initWithSerializedDataJni(aSerializedData, aKey))) {
+                retCode = true;
+            } else {
+                aErrorMsg.append(jniError);
+            }
+        }
+
+        return retCode;
+    }
+    private native String initWithSerializedDataJni(String aSerializedData, String aKey);
+
+
+    /**
      * Release native session and invalid its JAVA reference counter part.<br>
      * Public API for {@link #releaseSessionJni()}.
      */
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
index ca74352..eaf6110 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
@@ -97,7 +97,7 @@ public class OlmSession implements Serializable {
     }
 
     /**
-     * Return an account as a base64 string.<br>
+     * Return a session as a base64 string.<br>
      * The account is serialized and encrypted with aKey.
      * In case of failure, an error human readable
      * description is provide in aErrorMsg.
@@ -124,7 +124,7 @@ public class OlmSession implements Serializable {
 
 
     /**
-     * Loads an account from a pickled base64 string.<br>
+     * Loads a session from a pickled base64 string.<br>
      * See {@link #serializeDataWithKey(String, StringBuffer)}
      * @param aSerializedData pickled account in a base64 string format
      * @param aKey key used to encrypted
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/Android.mk b/java/android/OlmLibSdk/olm-sdk/src/main/jni/Android.mk
index 92a9359..7a8f20b 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/Android.mk
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/Android.mk
@@ -47,7 +47,8 @@ olm_account.cpp \
 olm_session.cpp \
 olm_jni_helper.cpp \
 olm_inbound_group_session.cpp \
-olm_outbound_group_session.cpp
+olm_outbound_group_session.cpp \
+olm_utility.cpp
 
 LOCAL_LDLIBS := -llog
 
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp
index fd3a977..1a1b360 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_account.cpp
@@ -642,7 +642,6 @@ JNIEXPORT jstring OLM_ACCOUNT_FUNC_DEF(initWithSerializedDataJni)(JNIEnv *env, j
         {
             LOGD(" ## initWithSerializedDataJni(): success - result=%lu ", result);
         }
-
     }
 
     // free alloc
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp
index 55c6539..67bf8bd 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.cpp
@@ -330,4 +330,166 @@ JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv
 }
 
 
+/**
+* Serialize and encrypt session instance into a base64 string.<br>
+* @param aKey key used to encrypt the serialized session data
+* @param[out] aErrorMsg error message set if operation failed
+* @return a base64 string if operation succeed, null otherwise
+**/
+JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(serializeDataWithKeyJni)(JNIEnv *env, jobject thiz, jstring aKey, jobject aErrorMsg)
+{
+    jstring pickledDataRetValue = 0;
+    jclass errorMsgJClass = 0;
+    jmethodID errorMsgMethodId = 0;
+    jstring errorJstring = 0;
+    const char *keyPtr = NULL;
+    void *pickledPtr = NULL;
+    OlmOutboundGroupSession* sessionPtr = NULL;
+
+    LOGD("## outbound group session serializeDataWithKeyJni(): IN");
+
+    if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
+    {
+        LOGE(" ## serializeDataWithKeyJni(): failure - invalid session ptr");
+    }
+    else if(0 == aKey)
+    {
+        LOGE(" ## serializeDataWithKeyJni(): failure - invalid key");
+    }
+    else if(0 == aErrorMsg)
+    {
+        LOGE(" ## serializeDataWithKeyJni(): failure - invalid error object");
+    }
+    else if(0 == (errorMsgJClass = env->GetObjectClass(aErrorMsg)))
+    {
+        LOGE(" ## serializeDataWithKeyJni(): failure - unable to get error class");
+    }
+    else if(0 == (errorMsgMethodId = env->GetMethodID(errorMsgJClass, "append", "(Ljava/lang/String;)Ljava/lang/StringBuffer;")))
+    {
+        LOGE(" ## serializeDataWithKeyJni(): failure - unable to get error method ID");
+    }
+    else if(NULL == (keyPtr = env->GetStringUTFChars(aKey, 0)))
+    {
+        LOGE(" ## serializeDataWithKeyJni(): failure - keyPtr JNI allocation OOM");
+    }
+    else
+    {
+        size_t pickledLength = olm_pickle_outbound_group_session_length(sessionPtr);
+        size_t keyLength = (size_t)env->GetStringUTFLength(aKey);
+        LOGD(" ## serializeDataWithKeyJni(): pickledLength=%lu keyLength=%lu",pickledLength, keyLength);
+        LOGD(" ## serializeDataWithKeyJni(): key=%s",(char const *)keyPtr);
+
+        if(NULL == (pickledPtr = (void*)malloc((pickledLength+1)*sizeof(uint8_t))))
+        {
+            LOGE(" ## serializeDataWithKeyJni(): failure - pickledPtr buffer OOM");
+        }
+        else
+        {
+            size_t result = olm_pickle_outbound_group_session(sessionPtr,
+                                                             (void const *)keyPtr,
+                                                              keyLength,
+                                                              (void*)pickledPtr,
+                                                              pickledLength);
+            if(result == olm_error())
+            {
+                const char *errorMsgPtr = olm_outbound_group_session_last_error(sessionPtr);
+                LOGE(" ## serializeDataWithKeyJni(): failure - olm_pickle_outbound_group_session() Msg=%s",errorMsgPtr);
+
+                if(0 != (errorJstring = env->NewStringUTF(errorMsgPtr)))
+                {
+                    env->CallObjectMethod(aErrorMsg, errorMsgMethodId, errorJstring);
+                }
+            }
+            else
+            {
+                // build success output
+                (static_cast<char*>(pickledPtr))[pickledLength] = static_cast<char>('\0');
+                pickledDataRetValue = env->NewStringUTF((const char*)pickledPtr);
+                LOGD(" ## serializeDataWithKeyJni(): success - result=%lu pickled=%s", result, static_cast<char*>(pickledPtr));
+            }
+        }
+    }
+
+    // free alloc
+    if(NULL != keyPtr)
+    {
+     env->ReleaseStringUTFChars(aKey, keyPtr);
+    }
+
+    if(NULL != pickledPtr)
+    {
+        free(pickledPtr);
+    }
+
+    return pickledDataRetValue;
+}
+
+
+JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(initWithSerializedDataJni)(JNIEnv *env, jobject thiz, jstring aSerializedData, jstring aKey)
+{
+    OlmOutboundGroupSession* sessionPtr = NULL;
+    jstring errorMessageRetValue = 0;
+    const char *keyPtr = NULL;
+    const char *pickledPtr = NULL;
+
+    LOGD("## initWithSerializedDataJni(): IN");
+
+    if(NULL == (sessionPtr = (OlmOutboundGroupSession*)getOutboundGroupSessionInstanceId(env,thiz)))
+    {
+        LOGE(" ## initWithSerializedDataJni(): failure - session failure OOM");
+    }
+    else if(0 == aKey)
+    {
+        LOGE(" ## initWithSerializedDataJni(): failure - invalid key");
+    }
+    else if(0 == aSerializedData)
+    {
+        LOGE(" ## initWithSerializedDataJni(): failure - serialized data");
+    }
+    else if(NULL == (keyPtr = env->GetStringUTFChars(aKey, 0)))
+    {
+        LOGE(" ## initWithSerializedDataJni(): failure - keyPtr JNI allocation OOM");
+    }
+    else if(NULL == (pickledPtr = env->GetStringUTFChars(aSerializedData, 0)))
+    {
+        LOGE(" ## initWithSerializedDataJni(): failure - pickledPtr JNI allocation OOM");
+    }
+    else
+    {
+        size_t pickledLength = (size_t)env->GetStringUTFLength(aSerializedData);
+        size_t keyLength = (size_t)env->GetStringUTFLength(aKey);
+        LOGD(" ## initWithSerializedDataJni(): pickledLength=%lu keyLength=%lu",pickledLength, keyLength);
+        LOGD(" ## initWithSerializedDataJni(): key=%s",(char const *)keyPtr);
+        LOGD(" ## initWithSerializedDataJni(): pickled=%s",(char const *)pickledPtr);
+
+        size_t result = olm_unpickle_outbound_group_session(sessionPtr,
+                                                            (void const *)keyPtr,
+                                                            keyLength,
+                                                            (void*)pickledPtr,
+                                                            pickledLength);
+        if(result == olm_error())
+        {
+            const char *errorMsgPtr = olm_outbound_group_session_last_error(sessionPtr);
+            LOGE(" ## initWithSerializedDataJni(): failure - olm_unpickle_outbound_group_session() Msg=%s",errorMsgPtr);
+            errorMessageRetValue = env->NewStringUTF(errorMsgPtr);
+        }
+        else
+        {
+            LOGD(" ## initWithSerializedDataJni(): success - result=%lu ", result);
+        }
+    }
+
+    // free alloc
+    if(NULL != keyPtr)
+    {
+        env->ReleaseStringUTFChars(aKey, keyPtr);
+    }
+
+    if(NULL != pickledPtr)
+    {
+        env->ReleaseStringUTFChars(aSerializedData, pickledPtr);
+    }
+
+    return errorMessageRetValue;
+}
 
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.h b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.h
index 6e264aa..22c32a7 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.h
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_outbound_group_session.h
@@ -38,6 +38,9 @@ JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(sessionKeyJni)(JNIEnv *env
 
 JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(encryptMessageJni)(JNIEnv *env, jobject thiz, jstring aClearMsgPtr);
 
+// serialization
+JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(serializeDataWithKeyJni)(JNIEnv *env, jobject thiz, jstring aKey, jobject aErrorMsg);
+JNIEXPORT jstring OLM_OUTBOUND_GROUP_SESSION_FUNC_DEF(initWithSerializedDataJni)(JNIEnv *env, jobject thiz, jstring aSerializedData, jstring aKey);
 
 #ifdef __cplusplus
 }
diff --git a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp
index 3422fee..9f64d2e 100644
--- a/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp
+++ b/java/android/OlmLibSdk/olm-sdk/src/main/jni/olm_session.cpp
@@ -41,7 +41,6 @@ OlmSession* initializeSessionMemory()
     return sessionPtr;
 }
 
-
 JNIEXPORT jlong OLM_SESSION_FUNC_DEF(createNewSessionJni)(JNIEnv *env, jobject thiz)
 {
     LOGD("## createNewSessionJni(): IN");