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Diffstat (limited to 'plugins/com.windriver.tcf.api/src/com/windriver/tcf/api/core/Base64.java')
-rw-r--r--plugins/com.windriver.tcf.api/src/com/windriver/tcf/api/core/Base64.java146
1 files changed, 146 insertions, 0 deletions
diff --git a/plugins/com.windriver.tcf.api/src/com/windriver/tcf/api/core/Base64.java b/plugins/com.windriver.tcf.api/src/com/windriver/tcf/api/core/Base64.java
new file mode 100644
index 000000000..498104fac
--- /dev/null
+++ b/plugins/com.windriver.tcf.api/src/com/windriver/tcf/api/core/Base64.java
@@ -0,0 +1,146 @@
+/*******************************************************************************
+ * Copyright (c) 2007 Wind River Systems, Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Wind River Systems - initial API and implementation
+ *******************************************************************************/
+package com.windriver.tcf.api.core;
+
+/**
+ * Methods for translating Base64 encoded strings to byte arrays and back.
+ */
+public class Base64 {
+
+ public static char[] toBase64(byte[] buf, int pos, int len) {
+ char[] out_buf = new char[4 * ((len + 2) / 3)];
+ int end = pos + len;
+ int out_pos = 0;
+ while (pos < end) {
+ int byte0 = buf[pos++] & 0xff;
+ out_buf[out_pos++] = int2char[byte0 >> 2];
+ if (pos == end) {
+ out_buf[out_pos++] = int2char[(byte0 << 4) & 0x3f];
+ out_buf[out_pos++] = '=';
+ out_buf[out_pos++] = '=';
+ }
+ else {
+ int byte1 = buf[pos++] & 0xff;
+ out_buf[out_pos++] = int2char[(byte0 << 4) & 0x3f | (byte1 >> 4)];
+ if (pos == end) {
+ out_buf[out_pos++] = int2char[(byte1 << 2) & 0x3f];
+ out_buf[out_pos++] = '=';
+ }
+ else {
+ int byte2 = buf[pos++] & 0xff;
+ out_buf[out_pos++] = int2char[(byte1 << 2) & 0x3f | (byte2 >> 6)];
+ out_buf[out_pos++] = int2char[byte2 & 0x3f];
+ }
+ }
+ }
+ assert out_pos == out_buf.length;
+ return out_buf;
+ }
+
+ public static void toByteArray(byte[] buf, int offs, int size, char[] inp) {
+ int out_pos = offs;
+ if (inp != null) {
+ int inp_len = inp.length;
+ if (inp_len % 4 != 0) {
+ throw new IllegalArgumentException(
+ "BASE64 string length must be a multiple of four.");
+ }
+ int out_len = inp_len / 4 * 3;
+ if (inp_len > 0 && inp[inp_len - 1] == '=') {
+ out_len--;
+ if (inp[inp_len - 2] == '=') {
+ out_len--;
+ }
+ }
+ if (out_len > size) {
+ throw new IllegalArgumentException(
+ "BASE64 data array is longer then destination buffer.");
+ }
+ int inp_pos = 0;
+ while (inp_pos < inp_len) {
+ int n0, n1, n2, n3;
+ char ch0 = inp[inp_pos++];
+ char ch1 = inp[inp_pos++];
+ char ch2 = inp[inp_pos++];
+ char ch3 = inp[inp_pos++];
+ if (ch0 >= char2int.length || (n0 = char2int[ch0]) < 0) {
+ throw new IllegalArgumentException("Illegal character " + ch0);
+ }
+ if (ch1 >= char2int.length || (n1 = char2int[ch1]) < 0) {
+ throw new IllegalArgumentException("Illegal character " + ch1);
+ }
+ buf[out_pos++] = (byte)((n0 << 2) | (n1 >> 4));
+ if (ch2 == '=') break;
+ if (ch2 >= char2int.length || (n2 = char2int[ch2]) < 0) {
+ throw new IllegalArgumentException("Illegal character " + ch2);
+ }
+ buf[out_pos++] = (byte)((n1 << 4) | (n2 >> 2));
+ if (ch3 == '=') break;
+ if (ch3 >= char2int.length || (n3 = char2int[ch3]) < 0) {
+ throw new IllegalArgumentException("Illegal character " + ch3);
+ }
+ buf[out_pos++] = (byte)((n2 << 6) | n3);
+ }
+ assert out_pos == offs + out_len;
+ }
+ while (out_pos < offs + size) buf[out_pos++] = 0;
+ }
+
+ public static byte[] toByteArray(char[] inp) {
+ int inp_len = inp.length;
+ int out_len = inp_len / 4 * 3;
+ if (inp_len > 0 && inp[inp_len - 1] == '=') {
+ out_len--;
+ if (inp[inp_len - 2] == '=') {
+ out_len--;
+ }
+ }
+ byte[] buf = new byte[out_len];
+ toByteArray(buf, 0, buf.length, inp);
+ return buf;
+ }
+
+ /*
+ * See RFC 2045.
+ */
+ private static final char int2char[] = {
+ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+ 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+ 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+ 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+ 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+ 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+ 'w', 'x', 'y', 'z', '0', '1', '2', '3',
+ '4', '5', '6', '7', '8', '9', '+', '/'
+ };
+
+ /*
+ * See RFC 2045
+ */
+ private static final byte char2int[] = {
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, 62, -1, -1, -1, 63,
+ 52, 53, 54, 55, 56, 57, 58, 59,
+ 60, 61, -1, -1, -1, -1, -1, -1,
+ -1, 0, 1, 2, 3, 4, 5, 6,
+ 7, 8, 9, 10, 11, 12, 13, 14,
+ 15, 16, 17, 18, 19, 20, 21, 22,
+ 23, 24, 25, -1, -1, -1, -1, -1,
+ -1, 26, 27, 28, 29, 30, 31, 32,
+ 33, 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46, 47, 48,
+ 49, 50, 51
+ };
+}

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