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Diffstat (limited to 'libjava/java/security/DigestInputStream.java')
-rw-r--r-- | libjava/java/security/DigestInputStream.java | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/libjava/java/security/DigestInputStream.java b/libjava/java/security/DigestInputStream.java deleted file mode 100644 index 0d4a9d05dc6..00000000000 --- a/libjava/java/security/DigestInputStream.java +++ /dev/null @@ -1,167 +0,0 @@ -/* DigestInputStream.java --- An Input stream tied to a message digest - Copyright (C) 1999, 2003, 2004, 2005 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.security; - -import java.io.FilterInputStream; -import java.io.IOException; -import java.io.InputStream; - -/** - * DigestInputStream is a class that ties an InputStream with a - * MessageDigest. The Message Digest is used by the class to - * update it self as bytes are read from the InputStream. - * - * The updating to the digest depends on the on flag which is set - * to true by default to tell the class to update the data - * in the message digest. - * - * @version 0.0 - * @author Mark Benvenuto (ivymccough@worldnet.att.net) - */ -public class DigestInputStream extends FilterInputStream -{ - /** - * The message digest for the DigestInputStream - */ - protected MessageDigest digest; - - //Manages the on flag - private boolean state = true; - - /** - * Constructs a new DigestInputStream. - * It associates a MessageDigest with the stream to - * compute the stream as data is written. - * - * @param stream An InputStream to associate this stream with - * @param digest A MessageDigest to hash the stream with - */ - public DigestInputStream(InputStream stream, MessageDigest digest) - { - super(stream); - //this.in = stream; - this.digest = digest; - } - - /** - * Returns the MessageDigest associated with this DigestInputStream - * - * @return The MessageDigest used to hash this stream - */ - public MessageDigest getMessageDigest() - { - return digest; - } - - /** - * Sets the current MessageDigest to current parameter - * - * @param digest A MessageDigest to associate with this stream - */ - public void setMessageDigest(MessageDigest digest) - { - this.digest = digest; - } - - /** - * Reads a byte from the input stream and updates the digest. - * This method reads the underlying input stream and if the - * on flag is true then updates the message digest. - * - * @return Returns a byte from the input stream, -1 is returned to indicate that - * the end of stream was reached before this read call - * - * @throws IOException if an IO error occurs in the underlying input stream, - * this error is thrown - */ - public int read() throws IOException - { - int temp = in.read(); - - if (state == true && temp != -1) - digest.update((byte) temp); - - return temp; - } - - /** - * Reads bytes from the input stream and updates the digest. - * This method reads the underlying input stream and if the - * on flag is true then updates the message digest. - * - * @param b a byte array to store the data from the input stream - * @param off an offset to start at in the array - * @param len length of data to read - * @return Returns count of bytes read, -1 is returned to indicate that - * the end of stream was reached before this read call - * - * @throws IOException if an IO error occurs in the underlying input stream, - * this error is thrown - */ - public int read(byte[]b, int off, int len) throws IOException - { - int temp = in.read(b, off, len); - - if (state == true && temp != -1) - digest.update(b, off, temp); - - return temp; - } - - /** - * Sets the flag specifing if this DigestInputStream updates the - * digest in the write() methods. The default is on; - * - * @param on True means it digests stream, false means it does not - */ - public void on(boolean on) - { - state = on; - } - - /** - * Converts the input stream and underlying message digest to a string. - * - * @return A string representing the input stream and message digest. - */ - public String toString() - { - return "[Digest Input Stream] " + digest.toString(); - } -} |