jdk/src/share/classes/sun/security/util/SignatureFileManifest.java
changeset 9391 5cad348bfb7b
parent 9390 76bb81c6327c
parent 9386 d54bd79072b0
child 9397 79de9afa367c
--- a/jdk/src/share/classes/sun/security/util/SignatureFileManifest.java	Mon May 02 09:36:49 2011 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,251 +0,0 @@
-/*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code 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
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.security.util;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.Arrays;
-import java.util.jar.Attributes;
-import java.util.jar.Manifest;
-
-/**
- * This class provides streaming mode reading of manifest files.
- * Used by {@link SignatureFileVerifier}.
- */
-class SignatureFileManifest extends Manifest {
-
-    /*
-     * Reading a manifest into this object by calling update(byte[]) on chunks.
-     * During the reading, the bytes are saved in (@code current} until a line
-     * is complete and the key-value pair is saved in {@code currentAttr}. When
-     * a section is complete, {@code consumeAttr} is called to merge
-     * {@code currentAttr} into main attributes or a named entry.
-     */
-
-    // Internal state during update() style reading
-    // 0. not in update mode
-    // 1, in update mode but main attributes not completed yet
-    // 2. main attributes completed, still reading the entries
-    private int state = 0;
-
-    // The partial line read
-    private byte[] current;
-
-    // Number of bytes in current
-    private int currentPos = 0;
-
-    // The current Attribute
-    private Attributes currentAttr;
-
-    /**
-     * Reads a manifest in chunks.
-     * <p>
-     * This method must be called in a row, reading chunks from a single
-     * manifest file by order. After all chunks are read, caller must call
-     * {@code update(null)} to fully consume the manifest.
-     * <p>
-     * The entry names and attributes read will be merged in with the current
-     * manifest entries. The {@link #read} method cannot be called inside a
-     * row of update calls.
-     * <p>
-     * Along with the calls, caller can call {@link #getMainAttributes()},
-     * {@link #getAttributes(java.lang.String)} or {@link #getEntries()}
-     * to get already available contents. However, in order not to return
-     * partial result, when the main attributes in the new manifest is not
-     * consumed completely, {@link #getMainAttributes()} throws an
-     * {@code IllegalStateException}. When a certain named entry is not
-     * consumed completely, {@link #getAttributes(java.lang.String)}
-     * returns the old {@code Attributes} for the name (if it exists).
-     *
-     * @param data null for last call, otherwise, feeding chunks
-     * @param offset offset into data to begin read
-     * @param length length of data after offset to read
-     * @exception IOException if an I/O error has occurred
-     * @exception IllegalStateException if {@code update(null)} is called
-     * without any previous {@code update(non-null)} call
-     */
-    public void update(byte[] data, int offset, int length) throws IOException {
-
-        // The last call
-        if (data == null) {
-            if (state == 0) {
-                throw new IllegalStateException("No data to update");
-            }
-            // We accept manifest not ended with \n or \n\n
-            if (hasLastByte()) {
-                consumeCurrent();
-            }
-            // We accept empty lines at the end
-            if (!currentAttr.isEmpty()) {
-                consumeAttr();
-            }
-            state = 0;  // back to non-update state
-            current = null;
-            currentAttr = null;
-            return;
-        }
-
-        // The first call
-        if (state == 0) {
-            current = new byte[1024];
-            currentAttr = super.getMainAttributes(); // the main attribute
-            state = 1;
-        }
-
-        int end = offset + length;
-
-        while (offset < end) {
-            switch (data[offset]) {
-                case '\r':
-                    break;  // always skip
-                case '\n':
-                    if (hasLastByte() && lastByte() == '\n') {  // new section
-                        consumeCurrent();
-                        consumeAttr();
-                        if (state == 1) {
-                            state = 2;
-                        }
-                        currentAttr = new Attributes(2);
-                    } else {
-                        if (hasLastByte()) {
-                            // save \n into current but do not parse,
-                            // there might be a continuation later
-                            ensureCapacity();
-                            current[currentPos++] = data[offset];
-                        } else if (state == 1) {
-                            // there can be multiple empty lines between
-                            // sections, but cannot be at the beginning
-                            throw new IOException("invalid manifest format");
-                        }
-                    }
-                    break;
-                case ' ':
-                    if (!hasLastByte()) {
-                        throw new IOException("invalid manifest format");
-                    } else if (lastByte() == '\n') {
-                        currentPos--;   // continuation, remove last \n
-                    } else {    // a very normal ' '
-                        ensureCapacity();
-                        current[currentPos++] = data[offset];
-                    }
-                    break;
-                default:
-                    if (hasLastByte() && lastByte() == '\n') {
-                        // The start of a new pair, not continuation
-                        consumeCurrent();   // the last line read
-                    }
-                    ensureCapacity();
-                    current[currentPos++] = data[offset];
-                    break;
-            }
-            offset++;
-        }
-    }
-
-    /**
-     * Returns the main Attributes for the Manifest.
-     * @exception IllegalStateException the main attributes is being read
-     * @return the main Attributes for the Manifest
-     */
-    public Attributes getMainAttributes() {
-        if (state == 1) {
-            throw new IllegalStateException();
-        }
-        return super.getMainAttributes();
-    }
-
-    /**
-     * Reads the Manifest from the specified InputStream. The entry
-     * names and attributes read will be merged in with the current
-     * manifest entries.
-     *
-     * @param is the input stream
-     * @exception IOException if an I/O error has occurred
-     * @exception IllegalStateException if called between two {@link #update}
-     * calls
-     */
-    public void read(InputStream is) throws IOException {
-        if (state != 0) {
-            throw new IllegalStateException("Cannot call read between updates");
-        }
-        super.read(is);
-    }
-
-    /*
-     * ----------  Helper methods  -----------------
-     */
-
-    private void ensureCapacity() {
-        if (currentPos >= current.length-1) {
-            current = Arrays.copyOf(current, current.length*2);
-        }
-    }
-
-    private boolean hasLastByte() {
-        return currentPos > 0;
-    }
-
-    private byte lastByte() {
-        return current[currentPos-1];
-    }
-
-    // Parse current as key:value and save into currentAttr.
-    // There MUST be something inside current.
-    private void consumeCurrent() throws IOException {
-        // current normally has a \n end, except for the last line
-        if (current[currentPos-1] == '\n') currentPos--;
-        for (int i=0; i<currentPos; i++) {
-            if (current[i] == ':') {
-                String key = new String(current, 0, 0, i);
-                i++;
-                while (i < currentPos && current[i] == ' ') { i++; }
-                String value = new String(current, i, currentPos-i, "UTF-8");
-                currentAttr.putValue(key, value);
-                currentPos = 0;
-                return;
-            }
-        }
-        throw new IOException("invalid header field");
-    }
-
-    // Merge currentAttr into Manifest
-    private void consumeAttr() throws IOException {
-        // Only needed for named entries. For the main attribute, key/value
-        // is added into attr directly, but since getMainAttributes() throws
-        // an exception, the partial data is not leaked.
-        if (state != 1) {
-            String name = currentAttr.getValue("Name");
-            if (name != null) {
-                currentAttr.remove(new Attributes.Name("Name"));
-                Attributes old = getAttributes(name);
-                if (old != null) old.putAll(currentAttr);
-                else getEntries().put(name, currentAttr);
-            } else {
-                throw new IOException("invalid manifest format");
-            }
-        }
-    }
-}