Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 129 insertions, 0 deletions

diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/hls/Aes128DataSource.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/hls/Aes128DataSource.java
new file mode 100644
index 0000000000..4643c0402c
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/hls/Aes128DataSource.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.mozilla.thirdparty.com.google.android.exoplayer2.source.hls;
+
+import android.net.Uri;
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSource;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSourceInputStream;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSpec;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.TransferListener;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import java.io.IOException;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.AlgorithmParameterSpec;
+import java.util.List;
+import java.util.Map;
+import javax.crypto.Cipher;
+import javax.crypto.CipherInputStream;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+/**
+ * A {@link DataSource} that decrypts data read from an upstream source, encrypted with AES-128 with
+ * a 128-bit key and PKCS7 padding.
+ *
+ * <p>Note that this {@link DataSource} does not support being opened from arbitrary offsets. It is
+ * designed specifically for reading whole files as defined in an HLS media playlist. For this
+ * reason the implementation is private to the HLS package.
+ */
+/* package */ class Aes128DataSource implements DataSource {
+
+  private final DataSource upstream;
+  private final byte[] encryptionKey;
+  private final byte[] encryptionIv;
+
+  @Nullable private CipherInputStream cipherInputStream;
+
+  /**
+   * @param upstream The upstream {@link DataSource}.
+   * @param encryptionKey The encryption key.
+   * @param encryptionIv The encryption initialization vector.
+   */
+  public Aes128DataSource(DataSource upstream, byte[] encryptionKey, byte[] encryptionIv) {
+    this.upstream = upstream;
+    this.encryptionKey = encryptionKey;
+    this.encryptionIv = encryptionIv;
+  }
+
+  @Override
+  public final void addTransferListener(TransferListener transferListener) {
+    upstream.addTransferListener(transferListener);
+  }
+
+  @Override
+  public final long open(DataSpec dataSpec) throws IOException {
+    Cipher cipher;
+    try {
+      cipher = getCipherInstance();
+    } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
+      throw new RuntimeException(e);
+    }
+
+    Key cipherKey = new SecretKeySpec(encryptionKey, "AES");
+    AlgorithmParameterSpec cipherIV = new IvParameterSpec(encryptionIv);
+
+    try {
+      cipher.init(Cipher.DECRYPT_MODE, cipherKey, cipherIV);
+    } catch (InvalidKeyException | InvalidAlgorithmParameterException e) {
+      throw new RuntimeException(e);
+    }
+
+    DataSourceInputStream inputStream = new DataSourceInputStream(upstream, dataSpec);
+    cipherInputStream = new CipherInputStream(inputStream, cipher);
+    inputStream.open();
+
+    return C.LENGTH_UNSET;
+  }
+
+  @Override
+  public final int read(byte[] buffer, int offset, int readLength) throws IOException {
+    Assertions.checkNotNull(cipherInputStream);
+    int bytesRead = cipherInputStream.read(buffer, offset, readLength);
+    if (bytesRead < 0) {
+      return C.RESULT_END_OF_INPUT;
+    }
+    return bytesRead;
+  }
+
+  @Override
+  @Nullable
+  public final Uri getUri() {
+    return upstream.getUri();
+  }
+
+  @Override
+  public final Map<String, List<String>> getResponseHeaders() {
+    return upstream.getResponseHeaders();
+  }
+
+  @Override
+  public void close() throws IOException {
+    if (cipherInputStream != null) {
+      cipherInputStream = null;
+      upstream.close();
+    }
+  }
+
+  protected Cipher getCipherInstance() throws NoSuchPaddingException, NoSuchAlgorithmException {
+    return Cipher.getInstance("AES/CBC/PKCS7Padding");
+  }
+}