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-rw-r--r--android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java5
-rw-r--r--android/olm-sdk/src/main/java/org/matrix/olm/OlmSAS.java153
2 files changed, 158 insertions, 0 deletions
diff --git a/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java b/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
index 532f318..5b4a85a 100644
--- a/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
@@ -76,6 +76,11 @@ public class OlmException extends IOException {
public static final int EXCEPTION_CODE_PK_SIGNING_INIT_WITH_SEED = 802;
public static final int EXCEPTION_CODE_PK_SIGNING_SIGN = 803;
+ public static final int EXCEPTION_CODE_SAS_CREATION = 900;
+ public static final int EXCEPTION_CODE_SAS_ERROR = 901;
+ public static final int EXCEPTION_CODE_SAS_MISSING_THEIR_PKEY = 902;
+ public static final int EXCEPTION_CODE_SAS_GENERATE_SHORT_CODE = 903;
+
// exception human readable messages
public static final String EXCEPTION_MSG_INVALID_PARAMS_DESERIALIZATION = "invalid de-serialized parameters";
diff --git a/android/olm-sdk/src/main/java/org/matrix/olm/OlmSAS.java b/android/olm-sdk/src/main/java/org/matrix/olm/OlmSAS.java
new file mode 100644
index 0000000..4bd1579
--- /dev/null
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmSAS.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2019 New Vector 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.
+ */
+package org.matrix.olm;
+
+import android.util.Log;
+
+import java.io.UnsupportedEncodingException;
+
+public class OlmSAS {
+
+ private static final String LOG_TAG = OlmSAS.class.getName();
+ /**
+ * Session Id returned by JNI.
+ * This value uniquely identifies the native SAS instance.
+ **/
+ private transient long mNativeId;
+
+ private String theirPublicKey = null;
+
+ public OlmSAS() throws OlmException {
+ try {
+ mNativeId = createNewSASJni();
+ } catch (Exception e) {
+ throw new OlmException(OlmException.EXCEPTION_CODE_SAS_CREATION, e.getMessage());
+ }
+ }
+
+ /**
+ * Gets the Public Key encoded in Base64 with no padding
+ */
+ public String getPublicKey() throws OlmException {
+ try {
+ byte[] buffer = getPubKeyJni();
+
+ if (null != buffer) {
+ return new String(buffer, "UTF-8");
+ }
+ } catch (Exception e) {
+ Log.e(LOG_TAG, "## sessionIdentifier(): " + e.getMessage());
+ throw new OlmException(OlmException.EXCEPTION_CODE_SAS_ERROR, e.getMessage());
+ }
+
+ return null;
+ }
+
+ /**
+ * Sets the public key of other user.
+ *
+ * @param otherPkey other user public key (base64 encoded with no padding)
+ * @throws OlmException
+ */
+ public void setTheirPublicKey(String otherPkey) throws OlmException {
+ try {
+ setTheirPubKey(otherPkey.getBytes("UTF-8"));
+ } catch (UnsupportedEncodingException e) {
+ throw new OlmException(OlmException.EXCEPTION_CODE_SAS_ERROR, e.getMessage());
+ }
+ this.theirPublicKey = otherPkey;
+ }
+
+
+ /**
+ * Generate bytes to use for the short authentication string.
+ *
+ * @param info info extra information to mix in when generating the bytes, as
+ * per the Matrix spec.
+ * @param byteNumber The size of the short code to generate
+ * @return The generated shortcode
+ * @throws OlmException
+ */
+ public byte[] generateShortCode(String info, int byteNumber) throws OlmException {
+ if (theirPublicKey == null || theirPublicKey.isEmpty()) {
+ throw new OlmException(OlmException.EXCEPTION_CODE_SAS_MISSING_THEIR_PKEY, "call setTheirPublicKey first");
+ }
+ try {
+ return generateShortCodeJni(info.getBytes("UTF-8"), byteNumber);
+ } catch (Exception e) {
+ Log.e(LOG_TAG, "## sessionIdentifier(): " + e.getMessage());
+ throw new OlmException(OlmException.EXCEPTION_CODE_SAS_GENERATE_SHORT_CODE, e.getMessage());
+ }
+ }
+
+
+ public String calculateMac(String message, String info) throws OlmException {
+ try {
+ byte[] bytes = calculateMacJni(message.getBytes("UTF-8"), info.getBytes("UTF-8"));
+ if (bytes != null) return new String(bytes, "UTF-8");
+ } catch (UnsupportedEncodingException e) {
+ throw new OlmException(OlmException.EXCEPTION_CODE_SAS_ERROR, e.getMessage());
+ }
+ return null;
+ }
+
+ public String calculateMacLongKdf(String message, String info) throws OlmException {
+ try {
+ byte[] bytes = calculateMacLongKdfJni(message.getBytes("UTF-8"), info.getBytes("UTF-8"));
+ if (bytes != null) return new String(bytes, "UTF-8");
+ } catch (UnsupportedEncodingException e) {
+ throw new OlmException(OlmException.EXCEPTION_CODE_SAS_ERROR, e.getMessage());
+ }
+ return null;
+ }
+
+ /**
+ * Create an OLM session in native side.<br>
+ * Do not forget to call {@link #releaseSASJni()} when JAVA side is done.
+ *
+ * @return native account instance identifier or throw an exception.
+ */
+ private native long createNewSASJni();
+
+ /**
+ * Destroy the corresponding OLM session native object.<br>
+ * This method must ALWAYS be called when this JAVA instance
+ * is destroyed (ie. garbage collected) to prevent memory leak in native side.
+ * See {@link #createNewSASJni()}.
+ */
+ private native void releaseSASJni();
+
+ private native byte[] getPubKeyJni();
+
+ private native void setTheirPubKey(byte[] pubKey);
+
+ private native byte[] generateShortCodeJni(byte[] info, int byteNumber);
+
+ private native byte[] calculateMacJni(byte[] message, byte[] info);
+
+ private native byte[] calculateMacLongKdfJni(byte[] message, byte[] info);
+
+ /**
+ * Release native session and invalid its JAVA reference counter part.<br>
+ * Public API for {@link #releaseSASJni()}.
+ */
+ public void releaseSas() {
+ if (0 != mNativeId) {
+ releaseSASJni();
+ }
+ mNativeId = 0;
+ }
+}