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@@ -1,268 +0,0 @@
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-package com.modular.apputils.utils.playsdk;
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-
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-public final class Base64 {
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-
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- private static final int BASELENGTH = 128;
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- private static final int LOOKUPLENGTH = 64;
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- private static final int TWENTYFOURBITGROUP = 24;
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- private static final int EIGHTBIT = 8;
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- private static final int SIXTEENBIT = 16;
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- private static final int FOURBYTE = 4;
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- private static final int SIGN = -128;
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- private static char PAD = '=';
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- private static byte[] base64Alphabet = new byte[BASELENGTH];
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- private static char[] lookUpBase64Alphabet = new char[LOOKUPLENGTH];
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-
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- static {
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- for (int i = 0; i < BASELENGTH; ++i) {
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- base64Alphabet[i] = -1;
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- }
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- for (int i = 'Z'; i >= 'A'; i--) {
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- base64Alphabet[i] = (byte) (i - 'A');
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- }
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- for (int i = 'z'; i >= 'a'; i--) {
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- base64Alphabet[i] = (byte) (i - 'a' + 26);
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- }
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-
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- for (int i = '9'; i >= '0'; i--) {
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- base64Alphabet[i] = (byte) (i - '0' + 52);
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- }
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-
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- base64Alphabet['+'] = 62;
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- base64Alphabet['/'] = 63;
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-
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- for (int i = 0; i <= 25; i++) {
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- lookUpBase64Alphabet[i] = (char) ('A' + i);
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- }
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-
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- for (int i = 26, j = 0; i <= 51; i++, j++) {
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- lookUpBase64Alphabet[i] = (char) ('a' + j);
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- }
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-
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- for (int i = 52, j = 0; i <= 61; i++, j++) {
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- lookUpBase64Alphabet[i] = (char) ('0' + j);
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- }
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- lookUpBase64Alphabet[62] = (char) '+';
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- lookUpBase64Alphabet[63] = (char) '/';
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-
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- }
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-
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- private static boolean isWhiteSpace(char octect) {
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- return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
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- }
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-
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- private static boolean isPad(char octect) {
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- return (octect == PAD);
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- }
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-
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- private static boolean isData(char octect) {
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- return (octect < BASELENGTH && base64Alphabet[octect] != -1);
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- }
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-
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- /**
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- * Encodes hex octects into Base64
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- *
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- * @param binaryData
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- * Array containing binaryData
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- * @return Encoded Base64 array
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- */
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- public static String encode(byte[] binaryData) {
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-
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- if (binaryData == null) {
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- return null;
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- }
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-
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- int lengthDataBits = binaryData.length * EIGHTBIT;
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- if (lengthDataBits == 0) {
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- return "";
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- }
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-
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- int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;
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- int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;
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- int numberQuartet = fewerThan24bits != 0 ? numberTriplets + 1
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- : numberTriplets;
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- char encodedData[] = null;
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-
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- encodedData = new char[numberQuartet * 4];
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-
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- byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;
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-
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- int encodedIndex = 0;
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- int dataIndex = 0;
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-
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- for (int i = 0; i < numberTriplets; i++) {
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- b1 = binaryData[dataIndex++];
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- b2 = binaryData[dataIndex++];
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- b3 = binaryData[dataIndex++];
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-
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- l = (byte) (b2 & 0x0f);
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- k = (byte) (b1 & 0x03);
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-
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- byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
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- : (byte) ((b1) >> 2 ^ 0xc0);
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- byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4)
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- : (byte) ((b2) >> 4 ^ 0xf0);
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- byte val3 = ((b3 & SIGN) == 0) ? (byte) (b3 >> 6)
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- : (byte) ((b3) >> 6 ^ 0xfc);
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-
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
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- }
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-
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- // form integral number of 6-bit groups
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- if (fewerThan24bits == EIGHTBIT) {
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- b1 = binaryData[dataIndex];
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- k = (byte) (b1 & 0x03);
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-
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- byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
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- : (byte) ((b1) >> 2 ^ 0xc0);
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
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- encodedData[encodedIndex++] = PAD;
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- encodedData[encodedIndex++] = PAD;
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- } else if (fewerThan24bits == SIXTEENBIT) {
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- b1 = binaryData[dataIndex];
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- b2 = binaryData[dataIndex + 1];
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- l = (byte) (b2 & 0x0f);
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- k = (byte) (b1 & 0x03);
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-
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- byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
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- : (byte) ((b1) >> 2 ^ 0xc0);
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- byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4)
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- : (byte) ((b2) >> 4 ^ 0xf0);
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-
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
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- encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
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- encodedData[encodedIndex++] = PAD;
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- }
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-
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- return new String(encodedData);
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- }
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-
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- /**
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- * Decodes Base64 data into octects
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- *
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- * @param encoded
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- * string containing Base64 data
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- * @return Array containind decoded data.
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- */
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- public static byte[] decode(String encoded) {
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-
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- if (encoded == null) {
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- return null;
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- }
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-
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- char[] base64Data = encoded.toCharArray();
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- // remove white spaces
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- int len = removeWhiteSpace(base64Data);
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-
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- if (len % FOURBYTE != 0) {
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- return null;// should be divisible by four
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- }
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-
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- int numberQuadruple = (len / FOURBYTE);
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-
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- if (numberQuadruple == 0) {
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- return new byte[0];
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- }
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-
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- byte decodedData[] = null;
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- byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
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- char d1 = 0, d2 = 0, d3 = 0, d4 = 0;
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-
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- int i = 0;
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- int encodedIndex = 0;
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- int dataIndex = 0;
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- decodedData = new byte[(numberQuadruple) * 3];
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-
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- for (; i < numberQuadruple - 1; i++) {
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-
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- if (!isData((d1 = base64Data[dataIndex++]))
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- || !isData((d2 = base64Data[dataIndex++]))
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- || !isData((d3 = base64Data[dataIndex++]))
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- || !isData((d4 = base64Data[dataIndex++]))) {
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- return null;
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- }// if found "no data" just return null
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-
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- b1 = base64Alphabet[d1];
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- b2 = base64Alphabet[d2];
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- b3 = base64Alphabet[d3];
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- b4 = base64Alphabet[d4];
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-
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- decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
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- decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
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- decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
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- }
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-
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- if (!isData((d1 = base64Data[dataIndex++]))
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- || !isData((d2 = base64Data[dataIndex++]))) {
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- return null;// if found "no data" just return null
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- }
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-
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- b1 = base64Alphabet[d1];
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- b2 = base64Alphabet[d2];
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-
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- d3 = base64Data[dataIndex++];
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- d4 = base64Data[dataIndex++];
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- if (!isData((d3)) || !isData((d4))) {// Check if they are PAD characters
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- if (isPad(d3) && isPad(d4)) {
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- if ((b2 & 0xf) != 0)// last 4 bits should be zero
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- {
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- return null;
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- }
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- byte[] tmp = new byte[i * 3 + 1];
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- System.arraycopy(decodedData, 0, tmp, 0, i * 3);
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- tmp[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
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- return tmp;
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- } else if (!isPad(d3) && isPad(d4)) {
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- b3 = base64Alphabet[d3];
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- if ((b3 & 0x3) != 0)// last 2 bits should be zero
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- {
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- return null;
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- }
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- byte[] tmp = new byte[i * 3 + 2];
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- System.arraycopy(decodedData, 0, tmp, 0, i * 3);
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- tmp[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
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- tmp[encodedIndex] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
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- return tmp;
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- } else {
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- return null;
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- }
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- } else { // No PAD e.g 3cQl
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- b3 = base64Alphabet[d3];
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- b4 = base64Alphabet[d4];
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- decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
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- decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
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- decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
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-
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- }
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-
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- return decodedData;
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- }
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-
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- /**
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- * remove WhiteSpace from MIME containing encoded Base64 data.
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- *
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- * @param data
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- * the byte array of base64 data (with WS)
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- * @return the new length
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- */
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- private static int removeWhiteSpace(char[] data) {
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- if (data == null) {
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- return 0;
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- }
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-
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- // count characters that's not whitespace
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- int newSize = 0;
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- int len = data.length;
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- for (int i = 0; i < len; i++) {
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- if (!isWhiteSpace(data[i])) {
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- data[newSize++] = data[i];
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- }
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- }
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- return newSize;
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- }
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-}
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Bitliker