1a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak/* 2a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * Copyright 2013 The Android Open Source Project 3a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * 4a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * Licensed under the Apache License, Version 2.0 (the "License"); 5a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * you may not use this file except in compliance with the License. 6a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * You may obtain a copy of the License at 7a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * 8a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * http://www.apache.org/licenses/LICENSE-2.0 9a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * 10a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * Unless required by applicable law or agreed to in writing, software 11a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * distributed under the License is distributed on an "AS IS" BASIS, 12a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * See the License for the specific language governing permissions and 14a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * limitations under the License. 15a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak */ 16a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 17a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniakpackage org.conscrypt; 18a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 19a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak/** 20a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * 21a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * Helper class for dealing with hexadecimal strings. 22a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak * 23a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak */ 24a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak// public for testing by TrustedCertificateStoreTest 25a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniakpublic class Hex { 26a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak private Hex() {} 27a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 28a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak private final static char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; 29a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 30a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak public static String bytesToHexString(byte[] bytes) { 31a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak char[] buf = new char[bytes.length * 2]; 32a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak int c = 0; 33a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak for (byte b : bytes) { 34a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak buf[c++] = DIGITS[(b >> 4) & 0xf]; 35a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak buf[c++] = DIGITS[b & 0xf]; 36a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak } 37a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak return new String(buf); 38a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak } 39a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 40a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak public static String intToHexString(int i, int minWidth) { 41a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak int bufLen = 8; // Max number of hex digits in an int 42a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak char[] buf = new char[bufLen]; 43a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak int cursor = bufLen; 44a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 45a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak do { 46a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak buf[--cursor] = DIGITS[i & 0xf]; 47a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak } while ((i >>>= 4) != 0 || (bufLen - cursor < minWidth)); 48a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 49a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak return new String(buf, cursor, bufLen - cursor); 50a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak } 51a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak 52a7157d7eebb61d55410af93fc960a96bcfe4296ePrzemyslaw Szczepaniak} 53