b8f663b69c
1) Move all the crypto classes from securesms.crypto. 2) Move all the crypto storage from securesms.database.keys 3) Replace the old imported BC code with spongycastle.
106 lines
3.1 KiB
Java
106 lines
3.1 KiB
Java
/**
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* Copyright (C) 2011 Whisper Systems
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.whispersystems.textsecure.util;
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/**
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* Utility for generating hex dumps.
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*/
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public class Hex {
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private final static int HEX_DIGITS_START = 10;
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private final static int ASCII_TEXT_START = HEX_DIGITS_START + (16*2 + (16/2));
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final static String EOL = System.getProperty("line.separator");
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private final static char[] HEX_DIGITS = {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
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};
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public static String toString(byte[] bytes) {
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return toString(bytes, 0, bytes.length);
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}
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public static String toString(byte[] bytes, int offset, int length) {
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StringBuffer buf = new StringBuffer();
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for (int i = 0; i < length; i++) {
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appendHexChar(buf, bytes[offset + i]);
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buf.append(' ');
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}
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return buf.toString();
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}
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public static String dump(byte[] bytes) {
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return dump(bytes, 0, bytes.length);
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}
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public static String dump(byte[] bytes, int offset, int length) {
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StringBuffer buf = new StringBuffer();
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int lines = ((length - 1) / 16) + 1;
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int lineOffset;
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int lineLength;
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for (int i = 0; i < lines; i++) {
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lineOffset = (i * 16) + offset;
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lineLength = Math.min(16, (length - (i * 16)));
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appendDumpLine(buf, i, bytes, lineOffset, lineLength);
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buf.append(EOL);
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}
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return buf.toString();
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}
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private static void appendDumpLine(StringBuffer buf, int line, byte[] bytes, int lineOffset, int lineLength) {
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buf.append(HEX_DIGITS[(line >> 28) & 0xf]);
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buf.append(HEX_DIGITS[(line >> 24) & 0xf]);
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buf.append(HEX_DIGITS[(line >> 20) & 0xf]);
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buf.append(HEX_DIGITS[(line >> 16) & 0xf]);
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buf.append(HEX_DIGITS[(line >> 12) & 0xf]);
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buf.append(HEX_DIGITS[(line >> 8) & 0xf]);
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buf.append(HEX_DIGITS[(line >> 4) & 0xf]);
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buf.append(HEX_DIGITS[(line ) & 0xf]);
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buf.append(": ");
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for (int i = 0; i < 16; i++) {
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int idx = i + lineOffset;
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if (i < lineLength) {
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int b = bytes[idx];
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appendHexChar(buf, b);
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} else {
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buf.append(" ");
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}
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if ((i % 2) == 1) {
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buf.append(' ');
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}
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}
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for (int i = 0; i < 16 && i < lineLength; i++) {
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int idx = i + lineOffset;
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int b = bytes[idx];
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if (b >= 0x20 && b <= 0x7e) {
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buf.append((char)b);
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} else {
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buf.append('.');
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}
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}
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}
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private static void appendHexChar(StringBuffer buf, int b) {
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buf.append(HEX_DIGITS[(b >> 4) & 0xf]);
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buf.append(HEX_DIGITS[b & 0xf]);
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}
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}
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