From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../classpath/java/security/DigestInputStream.java | 167 +++++++++++++++++++++ 1 file changed, 167 insertions(+) create mode 100644 libjava/classpath/java/security/DigestInputStream.java (limited to 'libjava/classpath/java/security/DigestInputStream.java') diff --git a/libjava/classpath/java/security/DigestInputStream.java b/libjava/classpath/java/security/DigestInputStream.java new file mode 100644 index 000000000..c0a74f3ab --- /dev/null +++ b/libjava/classpath/java/security/DigestInputStream.java @@ -0,0 +1,167 @@ +/* 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(); + } +} -- cgit v1.2.3