1 /* 2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.security.pkcs11; 27 28 import java.math.BigInteger; 29 import java.security.*; 30 31 /** 32 * Collection of static utility methods. 33 * 34 * @author Andreas Sterbenz 35 * @since 1.5 36 */ 37 public final class P11Util { 38 39 private static Object LOCK = new Object(); 40 41 private static volatile Provider sun, sunRsaSign, sunJce; 42 43 private P11Util() { 44 // empty 45 } 46 47 static Provider getSunProvider() { 48 Provider p = sun; 49 if (p == null) { 50 synchronized (LOCK) { 51 p = getProvider 52 (sun, "SUN", "sun.security.provider.Sun"); 53 sun = p; 54 } 55 } 56 return p; 57 } 58 59 static Provider getSunRsaSignProvider() { 60 Provider p = sunRsaSign; 61 if (p == null) { 62 synchronized (LOCK) { 63 p = getProvider 64 (sunRsaSign, "SunRsaSign", "sun.security.rsa.SunRsaSign"); 65 sunRsaSign = p; 66 } 67 } 68 return p; 69 } 70 71 static Provider getSunJceProvider() { 72 Provider p = sunJce; 73 if (p == null) { 74 synchronized (LOCK) { 75 p = getProvider 76 (sunJce, "SunJCE", "com.sun.crypto.provider.SunJCE"); 77 sunJce = p; 78 } 79 } 80 return p; 81 } 82 83 private static Provider getProvider(Provider p, String providerName, 84 String className) { 85 if (p != null) { 86 return p; 87 } 88 p = Security.getProvider(providerName); 89 if (p == null) { 90 try { 91 Class<?> clazz = Class.forName(className); 92 p = (Provider)clazz.newInstance(); 93 } catch (Exception e) { 94 throw new ProviderException 95 ("Could not find provider " + providerName, e); 96 } 97 } 98 return p; 99 } 100 101 static byte[] convert(byte[] input, int offset, int len) { 102 if ((offset == 0) && (len == input.length)) { 103 return input; 104 } else { 105 byte[] t = new byte[len]; 106 System.arraycopy(input, offset, t, 0, len); 107 return t; 108 } 109 } 110 111 static byte[] subarray(byte[] b, int ofs, int len) { 112 byte[] out = new byte[len]; 113 System.arraycopy(b, ofs, out, 0, len); 114 return out; 115 } 116 117 static byte[] concat(byte[] b1, byte[] b2) { 118 byte[] b = new byte[b1.length + b2.length]; 119 System.arraycopy(b1, 0, b, 0, b1.length); 120 System.arraycopy(b2, 0, b, b1.length, b2.length); 121 return b; 122 } 123 124 static long[] concat(long[] b1, long[] b2) { 125 if (b1.length == 0) { 126 return b2; 127 } 128 long[] b = new long[b1.length + b2.length]; 129 System.arraycopy(b1, 0, b, 0, b1.length); 130 System.arraycopy(b2, 0, b, b1.length, b2.length); 131 return b; 132 } 133 134 public static byte[] getMagnitude(BigInteger bi) { 135 byte[] b = bi.toByteArray(); 136 if ((b.length > 1) && (b[0] == 0)) { 137 int n = b.length - 1; 138 byte[] newarray = new byte[n]; 139 System.arraycopy(b, 1, newarray, 0, n); 140 b = newarray; 141 } 142 return b; 143 } 144 145 static byte[] getBytesUTF8(String s) { 146 try { 147 return s.getBytes("UTF8"); 148 } catch (java.io.UnsupportedEncodingException e) { 149 throw new RuntimeException(e); 150 } 151 } 152 153 static byte[] sha1(byte[] data) { 154 try { 155 MessageDigest md = MessageDigest.getInstance("SHA-1"); 156 md.update(data); 157 return md.digest(); 158 } catch (GeneralSecurityException e) { 159 throw new ProviderException(e); 160 } 161 } 162 163 private final static char[] hexDigits = "0123456789abcdef".toCharArray(); 164 165 static String toString(byte[] b) { 166 if (b == null) { 167 return "(null)"; 168 } 169 StringBuilder sb = new StringBuilder(b.length * 3); 170 for (int i = 0; i < b.length; i++) { 171 int k = b[i] & 0xff; 172 if (i != 0) { 173 sb.append(':'); 174 } 175 sb.append(hexDigits[k >>> 4]); 176 sb.append(hexDigits[k & 0xf]); 177 } 178 return sb.toString(); 179 } 180 181 }