diff options
Diffstat (limited to 'libjava/java/security/MessageDigestSpi.java')
-rw-r--r-- | libjava/java/security/MessageDigestSpi.java | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/libjava/java/security/MessageDigestSpi.java b/libjava/java/security/MessageDigestSpi.java index a50e0a0..509666c 100644 --- a/libjava/java/security/MessageDigestSpi.java +++ b/libjava/java/security/MessageDigestSpi.java @@ -40,15 +40,15 @@ package java.security; /** This is the Service Provider Interface (SPI) for MessageDigest class in java.security. It provides the back end functionality - for the MessageDigest class so that it can compute message + for the MessageDigest class so that it can compute message hashes. The default hashes are SHA-1 and MD5. A message hash takes data of arbitrary length and produces a unique number - representing it. + representing it. Cryptography service providers who want to implement their own message digest hashes need only to subclass this class. - The implementation of a Cloneable interface is left to up to + The implementation of a Cloneable interface is left to up to the programmer of a subclass. @version 0.0 @@ -135,7 +135,7 @@ public abstract class MessageDigestSpi } /** - Resets the digest engine. Reinitializes internal variables + Resets the digest engine. Reinitializes internal variables and clears sensitive data. */ protected abstract void engineReset(); @@ -150,9 +150,6 @@ public abstract class MessageDigestSpi */ public Object clone() throws CloneNotSupportedException { - if (this instanceof Cloneable) - return super.clone(); - else - throw new CloneNotSupportedException(); + return super.clone(); } } |