| /* |
| * Copyright (c) 2000-2021 The Legion of the Bouncy Castle Inc. (https://www.bouncycastle.org) |
| * <p> |
| * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
| * and associated documentation files (the "Software"), to deal in the Software without restriction, |
| *including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * </p> |
| * <p> |
| * The above copyright notice and this permission notice shall be included in all copies or substantial |
| * portions of the Software. |
| * </p> |
| * <p> |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
| * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * </p> |
| */ |
| package org.eclipse.jgit.gpg.bc.internal.keys; |
| |
| // This class is an unmodified copy from Bouncy Castle; needed because it's package-visible only and used by SExprParser. |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.bouncycastle.bcpg.HashAlgorithmTags; |
| import org.bouncycastle.bcpg.S2K; |
| import org.bouncycastle.util.io.Streams; |
| |
| /** |
| * Utility functions for looking a S-expression keys. This class will move when |
| * it finds a better home! |
| * <p> |
| * Format documented here: |
| * http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=blob;f=agent/keyformat.txt;h=42c4b1f06faf1bbe71ffadc2fee0fad6bec91a97;hb=refs/heads/master |
| * </p> |
| */ |
| class SXprUtils { |
| private static int readLength(InputStream in, int ch) throws IOException { |
| int len = ch - '0'; |
| |
| while ((ch = in.read()) >= 0 && ch != ':') { |
| len = len * 10 + ch - '0'; |
| } |
| |
| return len; |
| } |
| |
| static String readString(InputStream in, int ch) throws IOException { |
| int len = readLength(in, ch); |
| |
| char[] chars = new char[len]; |
| |
| for (int i = 0; i != chars.length; i++) { |
| chars[i] = (char) in.read(); |
| } |
| |
| return new String(chars); |
| } |
| |
| static byte[] readBytes(InputStream in, int ch) throws IOException { |
| int len = readLength(in, ch); |
| |
| byte[] data = new byte[len]; |
| |
| Streams.readFully(in, data); |
| |
| return data; |
| } |
| |
| static S2K parseS2K(InputStream in) throws IOException { |
| skipOpenParenthesis(in); |
| |
| // Algorithm is hard-coded to SHA1 below anyway. |
| readString(in, in.read()); |
| byte[] iv = readBytes(in, in.read()); |
| final long iterationCount = Long.parseLong(readString(in, in.read())); |
| |
| skipCloseParenthesis(in); |
| |
| // we have to return the actual iteration count provided. |
| S2K s2k = new S2K(HashAlgorithmTags.SHA1, iv, (int) iterationCount) { |
| @Override |
| public long getIterationCount() { |
| return iterationCount; |
| } |
| }; |
| |
| return s2k; |
| } |
| |
| static void skipOpenParenthesis(InputStream in) throws IOException { |
| int ch = in.read(); |
| if (ch != '(') { |
| throw new IOException( |
| "unknown character encountered: " + (char) ch); //$NON-NLS-1$ |
| } |
| } |
| |
| static void skipCloseParenthesis(InputStream in) throws IOException { |
| int ch = in.read(); |
| if (ch != ')') { |
| throw new IOException("unknown character encountered"); //$NON-NLS-1$ |
| } |
| } |
| } |