Copybara import of the project:

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5c8e998 by Henry Jalonen <henkka@spheroid.fi>:

Make InputStreamDecrypter.read() InputStream compliant

Convert the read signed integer to unsigned before returning it, because it is the behavior defined in the InputStream interface. It also makes it possible to distinguish between errors and successful read operations.

Fixes #10.

PiperOrigin-RevId: 567219401
Change-Id: Ie6f2726e2a5bfd71015022c24463d7bd41357d16

src/main/java/com/google/crypto/tink/streamingaead/InputStreamDecrypter.java

@@ -121,7 +121,7 @@ public synchronized int available() throws IOException {
   public synchronized int read() throws IOException {
     byte[] oneByte = new byte[1];
     if (read(oneByte) == 1) {
-      return oneByte[0];
+      return oneByte[0] & 0xff;
     }
     return -1;
   }