src/java.base/share/classes/java/util/zip/InflaterInputStream.java

*** 49,66 ****
--- 49,73 ----
       * Input buffer for decompression.
       */
      protected byte[] buf;
  
      /**
+      * Original input buffer.
+      */
+     protected byte[] originBuf;
+ 
+     /**
       * Length of input buffer.
       */
      protected int len;
  
      private boolean closed = false;
      // this flag is set to true after EOF has reached
      private boolean reachEOF = false;
  
+     private ZipCryption zipCryption;
+ 
      /**
       * Check to make sure that this stream has not been closed
       */
      private void ensureOpen() throws IOException {
          if (closed) {
*** 84,93 ****
--- 91,101 ----
          } else if (size <= 0) {
              throw new IllegalArgumentException("buffer size <= 0");
          }
          this.inf = inf;
          buf = new byte[size];
+         originBuf = new byte[size];
      }
  
      /**
       * Creates a new input stream with the specified decompressor and a
       * default buffer size.
*** 237,246 ****
--- 245,260 ----
          ensureOpen();
          len = in.read(buf, 0, buf.length);
          if (len == -1) {
              throw new EOFException("Unexpected end of ZLIB input stream");
          }
+ 
+         if (zipCryption != null) {
+             System.arraycopy(buf, 0, originBuf, 0, len);
+             zipCryption.decryptBytes(buf, 0, len);
+         }
+ 
          inf.setInput(buf, 0, len);
      }
  
      /**
       * Tests if this input stream supports the <code>mark</code> and
*** 283,288 ****
--- 297,313 ----
       * @see     java.io.IOException
       */
      public synchronized void reset() throws IOException {
          throw new IOException("mark/reset not supported");
      }
+ 
+     /**
+      * Set ZIP encryption/decryption engine to this inflater.
+      *
+      * @param zipCryption ZIP encrypt/decrypt engine. zip decryption will not
+      * work if this value set to null.
+      * @since 1.9
+      */
+     void setZipCryption(ZipCryption zipCryption) {
+         this.zipCryption = zipCryption;
+     }
  }