100644 blob 58695fc9ab8c1a220d09138784440124a53925db	BlockSource.java
100644 blob ce86eabe90c07e1a9faf482271225d715eae9e83	CancellableDigestOutputStream.java
100644 blob ea5877ffff72215ae24b8da1416adf17a89a93c4	NullMessageDigest.java