aboutsummaryrefslogtreecommitdiff
path: root/android/olm-sdk/src/main/jni/olm_inbound_group_session.cpp
blob: 23910bb6b6f025423b1990f696eac33e92354b47 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
/*
 * Copyright 2016 OpenMarket Ltd
 * Copyright 2016 Vector Creations Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "olm_inbound_group_session.h"

using namespace AndroidOlmSdk;

/**
 * Release the session allocation made by initializeInboundGroupSessionMemory().<br>
 * This method MUST be called when java counter part account instance is done.
 */
JNIEXPORT void OLM_INBOUND_GROUP_SESSION_FUNC_DEF(releaseSessionJni)(JNIEnv *env, jobject thiz)
{
    OlmInboundGroupSession* sessionPtr = getInboundGroupSessionInstanceId(env,thiz);

    LOGD("## releaseSessionJni(): InBound group session IN");

    if (!sessionPtr)
    {
        LOGE("## releaseSessionJni(): failure - invalid inbound group session instance");
    }
    else
    {
        LOGD(" ## releaseSessionJni(): sessionPtr=%p", sessionPtr);
#ifdef ENABLE_JNI_LOG
        size_t retCode = olm_clear_inbound_group_session(sessionPtr);
        LOGD(" ## releaseSessionJni(): clear_inbound_group_session=%lu",static_cast<long unsigned int>(retCode));
#else
        olm_clear_inbound_group_session(sessionPtr);
#endif

        LOGD(" ## releaseSessionJni(): free IN");
        free(sessionPtr);
        LOGD(" ## releaseSessionJni(): free OUT");
    }
}

/**
 * Initialize a new inbound group session and return it to JAVA side.<br>
 * Since a C prt is returned as a jlong, special care will be taken
 * to make the cast (OlmInboundGroupSession* => jlong) platform independent.
 * @param aSessionKeyBuffer session key from an outbound session
 * @return the initialized OlmInboundGroupSession* instance or throw an exception it fails.
 **/
JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(createNewSessionJni)(JNIEnv *env, jobject thiz, jbyteArray aSessionKeyBuffer)
{
    const char* errorMessage = NULL;
    OlmInboundGroupSession* sessionPtr = NULL;
    jbyte* sessionKeyPtr = NULL;
    size_t sessionSize = olm_inbound_group_session_size();

    LOGD("## createNewSessionJni(): inbound group session IN");

    if (!sessionSize)
    {
        LOGE(" ## createNewSessionJni(): failure - inbound group session size = 0");
        errorMessage = "inbound group session size = 0";
    }
    else if (!(sessionPtr = (OlmInboundGroupSession*)malloc(sessionSize)))
    {
        LOGE(" ## createNewSessionJni(): failure - inbound group session OOM");
        errorMessage = "inbound group session OOM";
    }
    else if (!aSessionKeyBuffer)
    {
        LOGE(" ## createNewSessionJni(): failure - invalid aSessionKey");
        errorMessage = "invalid aSessionKey";
    }
    else if (!(sessionKeyPtr = env->GetByteArrayElements(aSessionKeyBuffer, 0)))
    {
        LOGE(" ## createNewSessionJni(): failure - session key JNI allocation OOM");
        errorMessage = "Session key JNI allocation OOM";
    }
    else
    {
        sessionPtr = olm_inbound_group_session(sessionPtr);

        size_t sessionKeyLength = (size_t)env->GetArrayLength(aSessionKeyBuffer);
        LOGD(" ## createNewSessionJni(): sessionKeyLength=%lu", static_cast<long unsigned int>(sessionKeyLength));

        size_t sessionResult = olm_init_inbound_group_session(sessionPtr, (const uint8_t*)sessionKeyPtr, sessionKeyLength);

        if (sessionResult == olm_error())
        {
            errorMessage = olm_inbound_group_session_last_error(sessionPtr);
            LOGE(" ## createNewSessionJni(): failure - init inbound session creation Msg=%s", errorMessage);
        }
        else
        {
            LOGD(" ## createNewSessionJni(): success - result=%lu", static_cast<long unsigned int>(sessionResult));
        }
    }

    if (sessionKeyPtr)
    {
        env->ReleaseByteArrayElements(aSessionKeyBuffer, sessionKeyPtr, JNI_ABORT);
    }

    if (errorMessage)
    {
        env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
    }

    if (errorMessage)
    {
        // release the allocated session
        if (sessionPtr)
        {
            olm_clear_inbound_group_session(sessionPtr);
            free(sessionPtr);
        }

        env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
    }

    return (jlong)(intptr_t)sessionPtr;
}

/**
 * Get a base64-encoded identifier for this inbound group session.
 * An exception is thrown if the operation fails.
 * @return the base64-encoded identifier
 */
JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(sessionIdentifierJni)(JNIEnv *env, jobject thiz)
{
    const char* errorMessage = NULL;
    OlmInboundGroupSession *sessionPtr = getInboundGroupSessionInstanceId(env, thiz);
    jbyteArray returnValue = 0;

    LOGD("## sessionIdentifierJni(): inbound group session IN");

    if (!sessionPtr)
    {
        LOGE(" ## sessionIdentifierJni(): failure - invalid inbound group session instance");
        errorMessage = "invalid inbound group session instance";
    }
    else
    {
        // get the size to alloc
        size_t lengthSessionId = olm_inbound_group_session_id_length(sessionPtr);
        LOGD(" ## sessionIdentifierJni(): inbound group session lengthSessionId=%lu",static_cast<long unsigned int>(lengthSessionId));

        uint8_t *sessionIdPtr = (uint8_t*)malloc(lengthSessionId*sizeof(uint8_t));

        if (!sessionIdPtr)
        {
            LOGE(" ## sessionIdentifierJni(): failure - inbound group session identifier allocation OOM");
            errorMessage = "inbound group session identifier allocation OOM";
        }
        else
        {
            size_t result = olm_inbound_group_session_id(sessionPtr, sessionIdPtr, lengthSessionId);

            if (result == olm_error())
            {
                errorMessage = (const char *)olm_inbound_group_session_last_error(sessionPtr);
                LOGE(" ## sessionIdentifierJni(): failure - get inbound group session identifier failure Msg=%s",(const char *)olm_inbound_group_session_last_error(sessionPtr));
            }
            else
            {
                LOGD(" ## sessionIdentifierJni(): success - inbound group session result=%lu sessionId=%.*s",static_cast<long unsigned int>(result), static_cast<int>(result), (char*)sessionIdPtr);

                returnValue = env->NewByteArray(result);
                env->SetByteArrayRegion(returnValue, 0 , result, (jbyte*)sessionIdPtr);
            }

            free(sessionIdPtr);
        }
    }

    if (errorMessage)
    {
        env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
    }

    return returnValue;
}

/**
 * Decrypt a message.
 * An exception is thrown if the operation fails.
 * @param aEncryptedMsg the encrypted message
 * @param aDecryptMessageResult the decryptMessage information
 * @return the decrypted message
 */
JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(decryptMessageJni)(JNIEnv *env, jobject thiz, jbyteArray aEncryptedMsgBuffer, jobject aDecryptionResult)
{
    jbyteArray decryptedMsgBuffer = 0;
    const char* errorMessage = NULL;

    OlmInboundGroupSession *sessionPtr = getInboundGroupSessionInstanceId(env, thiz);
    jbyte *encryptedMsgPtr = NULL;
    jclass indexObjJClass = 0;
    jfieldID indexMsgFieldId;

    LOGD("## decryptMessageJni(): inbound group session IN");

    if (!sessionPtr)
    {
        LOGE(" ## decryptMessageJni(): failure - invalid inbound group session ptr=NULL");
        errorMessage = "invalid inbound group session ptr=NULL";
    }
    else if (!aEncryptedMsgBuffer)
    {
        LOGE(" ## decryptMessageJni(): failure - invalid encrypted message");
        errorMessage = "invalid encrypted message";
    }
    else if (!aDecryptionResult)
    {
        LOGE(" ## decryptMessageJni(): failure - invalid index object");
        errorMessage = "invalid index object";
    }
    else if (!(encryptedMsgPtr = env->GetByteArrayElements(aEncryptedMsgBuffer, 0)))
    {
        LOGE(" ## decryptMessageJni(): failure - encrypted message JNI allocation OOM");
        errorMessage = "encrypted message JNI allocation OOM";
    }
    else if (!(indexObjJClass = env->GetObjectClass(aDecryptionResult)))
    {
        LOGE("## decryptMessageJni(): failure - unable to get index class");
        errorMessage = "unable to get index class";
    }
    else if (!(indexMsgFieldId = env->GetFieldID(indexObjJClass,"mIndex","J")))
    {
        LOGE("## decryptMessageJni(): failure - unable to get index type field");
        errorMessage = "unable to get index type field";
    }
    else
    {
        // get encrypted message length
        size_t encryptedMsgLength = (size_t)env->GetArrayLength(aEncryptedMsgBuffer);
        uint8_t *tempEncryptedPtr = static_cast<uint8_t*>(malloc(encryptedMsgLength*sizeof(uint8_t)));

        // create a dedicated temp buffer to be used in next Olm API calls
        if (!tempEncryptedPtr)
        {
            LOGE(" ## decryptMessageJni(): failure - tempEncryptedPtr allocation OOM");
            errorMessage = "tempEncryptedPtr allocation OOM";
        }
        else
        {
            memcpy(tempEncryptedPtr, encryptedMsgPtr, encryptedMsgLength);
            LOGD(" ## decryptMessageJni(): encryptedMsgLength=%lu encryptedMsg=%.*s",static_cast<long unsigned int>(encryptedMsgLength), static_cast<int>(encryptedMsgLength), encryptedMsgPtr);

            // get max plaintext length
            size_t maxPlainTextLength = olm_group_decrypt_max_plaintext_length(sessionPtr,
                                                                               tempEncryptedPtr,
                                                                               encryptedMsgLength);
            if (maxPlainTextLength == olm_error())
            {
                errorMessage = olm_inbound_group_session_last_error(sessionPtr);
                LOGE(" ## decryptMessageJni(): failure - olm_group_decrypt_max_plaintext_length Msg=%s", errorMessage);
            }
            else
            {
                LOGD(" ## decryptMessageJni(): maxPlaintextLength=%lu",static_cast<long unsigned int>(maxPlainTextLength));

                uint32_t messageIndex = 0;

                // allocate output decrypted message
                uint8_t *plainTextMsgPtr = static_cast<uint8_t*>(malloc(maxPlainTextLength*sizeof(uint8_t)));

                // decrypt, but before reload encrypted buffer (previous one was destroyed)
                memcpy(tempEncryptedPtr, encryptedMsgPtr, encryptedMsgLength);
                size_t plaintextLength = olm_group_decrypt(sessionPtr,
                                                           tempEncryptedPtr,
                                                           encryptedMsgLength,
                                                           plainTextMsgPtr,
                                                           maxPlainTextLength,
                                                           &messageIndex);
                if (plaintextLength == olm_error())
                {
                    errorMessage = olm_inbound_group_session_last_error(sessionPtr);
                    LOGE(" ## decryptMessageJni(): failure - olm_group_decrypt Msg=%s", errorMessage);
                }
                else
                {
                    // update index
                    env->SetLongField(aDecryptionResult, indexMsgFieldId, (jlong)messageIndex);

                    decryptedMsgBuffer = env->NewByteArray(plaintextLength);
                    env->SetByteArrayRegion(decryptedMsgBuffer, 0 , plaintextLength, (jbyte*)plainTextMsgPtr);

                    LOGD(" ## decryptMessageJni(): UTF-8 Conversion - decrypted returnedLg=%lu OK",static_cast<long unsigned int>(plaintextLength));
                }

                if (plainTextMsgPtr)
                {
                    memset(plainTextMsgPtr, 0, maxPlainTextLength*sizeof(uint8_t));
                    free(plainTextMsgPtr);
                }
            }

            if (tempEncryptedPtr)
            {
                free(tempEncryptedPtr);
            }
        }
    }

    // free alloc
    if (encryptedMsgPtr)
    {
        env->ReleaseByteArrayElements(aEncryptedMsgBuffer, encryptedMsgPtr, JNI_ABORT);
    }

    if (errorMessage)
    {
        env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
    }

    return decryptedMsgBuffer;
}


/**
 * Serialize and encrypt session instance into a base64 string.<br>
 * An exception is thrown if the operation fails.
 * @param aKeyBuffer key used to encrypt the serialized session data
 * @return a base64 string if operation succeed, null otherwise
 **/
JNIEXPORT jbyteArray OLM_INBOUND_GROUP_SESSION_FUNC_DEF(serializeJni)(JNIEnv *env, jobject thiz, jbyteArray aKeyBuffer)
{
    const char* errorMessage = NULL;

    jbyteArray pickledDataRet = 0;
    jbyte* keyPtr = NULL;
    OlmInboundGroupSession* sessionPtr = getInboundGroupSessionInstanceId(env, thiz);

    LOGD("## inbound group session serializeJni(): IN");

    if (!sessionPtr)
    {
        LOGE(" ## serializeJni(): failure - invalid session ptr");
        errorMessage = "invalid session ptr";
    }
    else if (!aKeyBuffer)
    {
        LOGE(" ## serializeJni(): failure - invalid key");
        errorMessage = "invalid key";
    }
    else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
    {
        LOGE(" ## serializeJni(): failure - keyPtr JNI allocation OOM");
        errorMessage = "keyPtr JNI allocation OOM";
    }
    else
    {
        size_t pickledLength = olm_pickle_inbound_group_session_length(sessionPtr);
        size_t keyLength = (size_t)env->GetArrayLength(aKeyBuffer);
        LOGD(" ## serializeJni(): pickledLength=%lu keyLength=%lu", static_cast<long unsigned int>(pickledLength), static_cast<long unsigned int>(keyLength));

        void *pickledPtr = malloc(pickledLength*sizeof(uint8_t));

        if (!pickledPtr)
        {
            LOGE(" ## serializeJni(): failure - pickledPtr buffer OOM");
            errorMessage = "pickledPtr buffer OOM";
        }
        else
        {
            size_t result = olm_pickle_inbound_group_session(sessionPtr,
                                                             (void const *)keyPtr,
                                                              keyLength,
                                                              (void*)pickledPtr,
                                                              pickledLength);
            if (result == olm_error())
            {
                errorMessage = olm_inbound_group_session_last_error(sessionPtr);
                LOGE(" ## serializeJni(): failure - olm_pickle_outbound_group_session() Msg=%s", errorMessage);
            }
            else
            {
                LOGD(" ## serializeJni(): success - result=%lu pickled=%.*s", static_cast<long unsigned int>(result), static_cast<int>(pickledLength), static_cast<char*>(pickledPtr));

                pickledDataRet = env->NewByteArray(pickledLength);
                env->SetByteArrayRegion(pickledDataRet, 0 , pickledLength, (jbyte*)pickledPtr);
            }

            free(pickledPtr);
        }
    }

    // free alloc
    if (keyPtr)
    {
        env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
    }

    if (errorMessage)
    {
        env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
    }

    return pickledDataRet;
}

/**
 * Allocate a new session and initialize it with the serialisation data.<br>
 * An exception is thrown if the operation fails.
 * @param aSerializedData the session serialisation buffer
 * @param aKey the key used to encrypt the serialized account data
 * @return the deserialized session
 **/
JNIEXPORT jlong OLM_INBOUND_GROUP_SESSION_FUNC_DEF(deserializeJni)(JNIEnv *env, jobject thiz, jbyteArray aSerializedDataBuffer, jbyteArray aKeyBuffer)
{
    const char* errorMessage = NULL;

    OlmInboundGroupSession* sessionPtr = NULL;
    size_t sessionSize = olm_inbound_group_session_size();
    jbyte* keyPtr = NULL;
    jbyte* pickledPtr = NULL;

    LOGD("## deserializeJni(): IN");

    if (!sessionSize)
    {
        LOGE(" ## deserializeJni(): failure - inbound group session size = 0");
        errorMessage = "inbound group session size = 0";
    }
    else if (!(sessionPtr = (OlmInboundGroupSession*)malloc(sessionSize)))
    {
        LOGE(" ## deserializeJni(): failure - session failure OOM");
        errorMessage = "session failure OOM";
    }
    else if (!aKeyBuffer)
    {
        LOGE(" ## deserializeJni(): failure - invalid key");
        errorMessage = "invalid key";
    }
    else if (!aSerializedDataBuffer)
    {
        LOGE(" ## deserializeJni(): failure - serialized data");
        errorMessage = "serialized data";
    }
    else if (!(keyPtr = env->GetByteArrayElements(aKeyBuffer, 0)))
    {
        LOGE(" ## deserializeJni(): failure - keyPtr JNI allocation OOM");
        errorMessage = "keyPtr JNI allocation OOM";
    }
    else if (!(pickledPtr = env->GetByteArrayElements(aSerializedDataBuffer, 0)))
    {
        LOGE(" ## deserializeJni(): failure - pickledPtr JNI allocation OOM");
        errorMessage = "pickledPtr JNI allocation OOM";
    }
    else
    {
        sessionPtr = olm_inbound_group_session(sessionPtr);

        size_t pickledLength = (size_t)env->GetArrayLength(aSerializedDataBuffer);
        size_t keyLength = (size_t)env->GetArrayLength(aKeyBuffer);
        LOGD(" ## deserializeJni(): pickledLength=%lu keyLength=%lu",static_cast<long unsigned int>(pickledLength), static_cast<long unsigned int>(keyLength));
        LOGD(" ## deserializeJni(): pickled=%.*s", static_cast<int>(pickledLength), (char const *)pickledPtr);

        size_t result = olm_unpickle_inbound_group_session(sessionPtr,
                                                           (void const *)keyPtr,
                                                           keyLength,
                                                           (void*)pickledPtr,
                                                           pickledLength);
        if (result == olm_error())
        {
            errorMessage = olm_inbound_group_session_last_error(sessionPtr);
            LOGE(" ## deserializeJni(): failure - olm_unpickle_inbound_group_session() Msg=%s", errorMessage);
        }
        else
        {
            LOGD(" ## deserializeJni(): success - result=%lu ", static_cast<long unsigned int>(result));
        }
    }

    // free alloc
    if (keyPtr)
    {
        env->ReleaseByteArrayElements(aKeyBuffer, keyPtr, JNI_ABORT);
    }

    if (pickledPtr)
    {
        env->ReleaseByteArrayElements(aSerializedDataBuffer, pickledPtr, JNI_ABORT);
    }

    if (errorMessage)
    {
        if (sessionPtr)
        {
            olm_clear_inbound_group_session(sessionPtr);
            free(sessionPtr);
        }
        env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
    }

    return (jlong)(intptr_t)sessionPtr;
}