1 /* 2 * Copyright (C) 2015, Google Inc. 3 * and other copyright owners as documented in the project's IP log. 4 * 5 * This program and the accompanying materials are made available 6 * under the terms of the Eclipse Distribution License v1.0 which 7 * accompanies this distribution, is reproduced below, and is 8 * available at http://www.eclipse.org/org/documents/edl-v10.php 9 * 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials provided 22 * with the distribution. 23 * 24 * - Neither the name of the Eclipse Foundation, Inc. nor the 25 * names of its contributors may be used to endorse or promote 26 * products derived from this software without specific prior 27 * written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 */ 43 44 package org.eclipse.jgit.transport; 45 46 import org.eclipse.jgit.lib.Config; 47 import org.eclipse.jgit.lib.Config.SectionParser; 48 49 /** 50 * Configuration for server-side signed push verification. 51 * 52 * @since 4.1 53 */ 54 public class SignedPushConfig { 55 /** Key for {@link Config#get(SectionParser)}. */ 56 public static final SectionParser<SignedPushConfig> KEY = 57 new SectionParser<SignedPushConfig>() { 58 public SignedPushConfig parse(Config cfg) { 59 return new SignedPushConfig(cfg); 60 } 61 }; 62 63 private String certNonceSeed; 64 private int certNonceSlopLimit; 65 private NonceGenerator nonceGenerator; 66 67 /** Create a new config with default values disabling push verification. */ 68 public SignedPushConfig() { 69 } 70 71 SignedPushConfig(Config cfg) { 72 setCertNonceSeed(cfg.getString("receive", null, "certnonceseed")); //$NON-NLS-1$ //$NON-NLS-2$ 73 certNonceSlopLimit = cfg.getInt("receive", "certnonceslop", 0); //$NON-NLS-1$ //$NON-NLS-2$ 74 } 75 76 /** 77 * Set the seed used by the nonce verifier. 78 * <p> 79 * Setting this to a non-null value enables push certificate verification 80 * using the default {@link HMACSHA1NonceGenerator} implementation, if a 81 * different implementation was not set using {@link 82 * #setNonceGenerator(NonceGenerator)}. 83 * 84 * @param seed 85 * new seed value. 86 */ 87 public void setCertNonceSeed(String seed) { 88 certNonceSeed = seed; 89 } 90 91 /** @return the configured seed. */ 92 public String getCertNonceSeed() { 93 return certNonceSeed; 94 } 95 96 /** 97 * Set the nonce slop limit. 98 * <p> 99 * Old but valid nonces within this limit will be accepted. 100 * 101 * @param limit 102 * new limit in seconds. 103 */ 104 public void setCertNonceSlopLimit(int limit) { 105 certNonceSlopLimit = limit; 106 } 107 108 /** @return the configured nonce slop limit. */ 109 public int getCertNonceSlopLimit() { 110 return certNonceSlopLimit; 111 } 112 113 /** 114 * Set the {@link NonceGenerator} used for signed pushes. 115 * <p> 116 * Setting this to a non-null value enables push certificate verification. If 117 * this method is called, this implementation will be used instead of the 118 * default {@link HMACSHA1NonceGenerator} even if {@link 119 * #setCertNonceSeed(String)} was called. 120 * 121 * @param generator 122 * new nonce generator. 123 */ 124 public void setNonceGenerator(NonceGenerator generator) { 125 nonceGenerator = generator; 126 } 127 128 /** 129 * Get the {@link NonceGenerator} used for signed pushes. 130 * <p> 131 * If {@link #setNonceGenerator(NonceGenerator)} was used to set a non-null 132 * implementation, that will be returned. If no custom implementation was set 133 * but {@link #setCertNonceSeed(String)} was called, returns a newly-created 134 * {@link HMACSHA1NonceGenerator}. 135 * 136 * @return the configured nonce generator. 137 */ 138 public NonceGenerator getNonceGenerator() { 139 if (nonceGenerator != null) { 140 return nonceGenerator; 141 } else if (certNonceSeed != null) { 142 return new HMACSHA1NonceGenerator(certNonceSeed); 143 } 144 return null; 145 } 146 }