| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package libcore.java.security; |
| |
| import java.security.NoSuchAlgorithmException; |
| import java.security.Provider; |
| import java.security.Security; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Comparator; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.TreeSet; |
| import javax.crypto.Cipher; |
| import javax.crypto.NoSuchPaddingException; |
| |
| /** |
| * Prints a list of all algorithms provided by security providers. Intended to be run |
| * via vogar as part of the algorithm documentation update process. |
| * <p> |
| * {@code vogar libcore/tools/src/java/libcore/java/security/ListProviders.java} |
| */ |
| public class ListProviders { |
| |
| private static final boolean SHOW_PROVIDER = false; |
| |
| // These algorithms were previously provided, but now are aliases for a different |
| // algorithm. For documentation purposes, we want to continue having them show up |
| // as supported. |
| private static final Set<String> KNOWN_ALIASES = new TreeSet<>(Arrays.asList(new String[]{ |
| "Alg.Alias.Signature.DSA", |
| "Alg.Alias.Signature.DSAwithSHA1", |
| "Alg.Alias.Signature.ECDSA", |
| "Alg.Alias.Signature.ECDSAwithSHA1", |
| })); |
| |
| // Ciphers come in algorithm/mode/padding combinations, and not all combinations are explicitly |
| // registered by the providers (sometimes only the base algorithm is registered). While there |
| // is a mechanism for providers to specify which modes and/or paddings are supported for a |
| // given algorithm, none of our providers use it. Thus, when a base algorithm is seen, all |
| // combinations of modes and paddings will be tried to see which ones are supported. |
| private static final Set<String> CIPHER_MODES = new TreeSet<>(Arrays.asList(new String[]{ |
| "CBC", |
| "CFB", |
| "CTR", |
| "CTS", |
| "ECB", |
| "GCM", |
| "OFB", |
| "NONE", |
| })); |
| private static final Set<String> CIPHER_PADDINGS = new TreeSet<>(Arrays.asList(new String[]{ |
| "NoPadding", |
| "OAEPPadding", |
| "OAEPwithSHA-1andMGF1Padding", |
| "OAEPwithSHA-224andMGF1Padding", |
| "OAEPwithSHA-256andMGF1Padding", |
| "OAEPwithSHA-384andMGF1Padding", |
| "OAEPwithSHA-512andMGF1Padding", |
| "PKCS1Padding", |
| "PKCS5Padding", |
| "ISO10126Padding", |
| })); |
| |
| private static void print(Provider p, String type, String algorithm) { |
| System.out.println((SHOW_PROVIDER ? p.getName() + ": " : "") + type + " " + algorithm); |
| } |
| |
| public static void main(String[] argv) { |
| System.out.println("BEGIN ALGORITHM LIST"); |
| for (Provider p : Security.getProviders()) { |
| Set<Provider.Service> services = new TreeSet<Provider.Service>( |
| new Comparator<Provider.Service>() { |
| public int compare(Provider.Service a, Provider.Service b) { |
| int typeCompare = a.getType().compareTo(b.getType()); |
| if (typeCompare != 0) { |
| return typeCompare; |
| } |
| return a.getAlgorithm().compareTo(b.getAlgorithm()); |
| } |
| }); |
| services.addAll(p.getServices()); |
| for (Provider.Service s : services) { |
| if (s.getType().equals("Cipher") && s.getAlgorithm().startsWith("PBE")) { |
| // PBE ciphers are a mess and generally don't do anything but delegate |
| // to the underlying cipher. We don't want to document them. |
| continue; |
| } |
| if (s.getType().equals("Cipher") && s.getAlgorithm().indexOf('/') == -1) { |
| for (String mode : CIPHER_MODES) { |
| for (String padding : CIPHER_PADDINGS) { |
| try { |
| String name = s.getAlgorithm() + "/" + mode + "/" + padding; |
| Cipher.getInstance(name, p); |
| print(p, s.getType(), name); |
| } catch (NoSuchAlgorithmException |
| |NoSuchPaddingException |
| |IllegalArgumentException e) { |
| // This combination doesn't work |
| } |
| } |
| } |
| } else { |
| print(p, s.getType(), s.getAlgorithm()); |
| } |
| } |
| for (String alias : KNOWN_ALIASES) { |
| if (p.containsKey(alias)) { |
| String[] elements = alias.split("\\."); // Split takes a regex |
| print(p, elements[2], elements[3]); |
| } |
| } |
| } |
| System.out.println("END ALGORITHM LIST"); |
| } |
| } |