Android 的网络编程(13)-Http post发送加密内容

package wizzer.cn.app; public class SecBase64 {    private static final byte[] encodingTable = { (byte) 'A', (byte) 'B',            (byte) 'C', (byte) 'D', (byte) 'E', (byte) 'F', (byte) 'G',            (byte) 'H', (byte) 'I', (byte) 'J', (byte) 'K', (byte) 'L',            (byte) 'M', (byte) 'N', (byte) 'O', (byte) 'P', (byte) 'Q',            (byte) 'R', (byte) 'S', (byte) 'T', (byte) 'U', (byte) 'V',            (byte) 'W', (byte) 'X', (byte) 'Y', (byte) 'Z', (byte) 'a',            (byte) 'b', (byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f',            (byte) 'g', (byte) 'h', (byte) 'i', (byte) 'j', (byte) 'k',            (byte) 'l', (byte) 'm', (byte) 'n', (byte) 'o', (byte) 'p',            (byte) 'q', (byte) 'r', (byte) 's', (byte) 't', (byte) 'u',            (byte) 'v', (byte) 'w', (byte) 'x', (byte) 'y', (byte) 'z',            (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4',            (byte) '5', (byte) '6', (byte) '7', (byte) '8', (byte) '9',            (byte) '+', (byte) '/' };         private static final byte[] decodingTable;         static {        decodingTable = new byte[128];        for (int i = 0; i < 128; i++) {            decodingTable[i] = (byte) -1;        }        for (int i = 'A'; i <= 'Z'; i++) {            decodingTable[i] = (byte) (i - 'A');        }        for (int i = 'a'; i <= 'z'; i++) {            decodingTable[i] = (byte) (i - 'a' + 26);        }        for (int i = '0'; i <= '9'; i++) {            decodingTable[i] = (byte) (i - '0' + 52);        }        decodingTable['+'] = 62;        decodingTable['/'] = 63;    }     // 加密    public static byte[] encode(byte[] data) {        byte[] bytes;        int modulus = data.length % 3;        if (modulus == 0) {            bytes = new byte[(4 * data.length) / 3];        } else {            bytes = new byte[4 * ((data.length / 3) + 1)];        }        int dataLength = (data.length - modulus);        int a1;        int a2;        int a3;        for (int i = 0, j = 0; i < dataLength; i += 3, j += 4) {            a1 = data[i] & 0xff;            a2 = data[i + 1] & 0xff;            a3 = data[i + 2] & 0xff;            bytes[j] = encodingTable[(a1 >>> 2) & 0x3f];            bytes[j + 1] = encodingTable[((a1 << 4) | (a2 >>> 4)) & 0x3f];            bytes[j + 2] = encodingTable[((a2 << 2) | (a3 >>> 6)) & 0x3f];            bytes[j + 3] = encodingTable[a3 & 0x3f];        }        int b1;        int b2;        int b3;        int d1;        int d2;        switch (modulus) {        case 0:            break;        case 1:            d1 = data[data.length - 1] & 0xff;            b1 = (d1 >>> 2) & 0x3f;            b2 = (d1 << 4) & 0x3f;            bytes[bytes.length - 4] = encodingTable[b1];            bytes[bytes.length - 3] = encodingTable[b2];            bytes[bytes.length - 2] = (byte) '=';            bytes[bytes.length - 1] = (byte) '=';            break;        case 2:            d1 = data[data.length - 2] & 0xff;            d2 = data[data.length - 1] & 0xff;            b1 = (d1 >>> 2) & 0x3f;            b2 = ((d1 << 4) | (d2 >>> 4)) & 0x3f;            b3 = (d2 << 2) & 0x3f;            bytes[bytes.length - 4] = encodingTable[b1];            bytes[bytes.length - 3] = encodingTable[b2];            bytes[bytes.length - 2] = encodingTable[b3];            bytes[bytes.length - 1] = (byte) '=';            break;        }        return bytes;    }     // 解密    public static byte[] decode(byte[] data) {        byte[] bytes;        byte b1;        byte b2;        byte b3;        byte b4;        data = discardNonBase64Bytes(data);        if (data[data.length - 2] == '=') {            bytes = new byte[(((data.length / 4) - 1) * 3) + 1];        } else if (data[data.length - 1] == '=') {            bytes = new byte[(((data.length / 4) - 1) * 3) + 2];        } else {            bytes = new byte[((data.length / 4) * 3)];        }        for (int i = 0, j = 0; i < (data.length - 4); i += 4, j += 3) {            b1 = decodingTable[data[i]];            b2 = decodingTable[data[i + 1]];            b3 = decodingTable[data[i + 2]];            b4 = decodingTable[data[i + 3]];            bytes[j] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[j + 1] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[j + 2] = (byte) ((b3 << 6) | b4);        }        if (data[data.length - 2] == '=') {            b1 = decodingTable[data[data.length - 4]];            b2 = decodingTable[data[data.length - 3]];            bytes[bytes.length - 1] = (byte) ((b1 << 2) | (b2 >> 4));        } else if (data[data.length - 1] == '=') {            b1 = decodingTable[data[data.length - 4]];            b2 = decodingTable[data[data.length - 3]];            b3 = decodingTable[data[data.length - 2]];            bytes[bytes.length - 2] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 1] = (byte) ((b2 << 4) | (b3 >> 2));        } else {            b1 = decodingTable[data[data.length - 4]];            b2 = decodingTable[data[data.length - 3]];            b3 = decodingTable[data[data.length - 2]];            b4 = decodingTable[data[data.length - 1]];            bytes[bytes.length - 3] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 2] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[bytes.length - 1] = (byte) ((b3 << 6) | b4);        }        return bytes;    }     // 解密    public static byte[] decode(String data) {        byte[] bytes;        byte b1;        byte b2;        byte b3;        byte b4;        data = discardNonBase64Chars(data);        if (data.charAt(data.length() - 2) == '=') {            bytes = new byte[(((data.length() / 4) - 1) * 3) + 1];        } else if (data.charAt(data.length() - 1) == '=') {            bytes = new byte[(((data.length() / 4) - 1) * 3) + 2];        } else {            bytes = new byte[((data.length() / 4) * 3)];        }        for (int i = 0, j = 0; i < (data.length() - 4); i += 4, j += 3) {            b1 = decodingTable[data.charAt(i)];            b2 = decodingTable[data.charAt(i + 1)];            b3 = decodingTable[data.charAt(i + 2)];            b4 = decodingTable[data.charAt(i + 3)];            bytes[j] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[j + 1] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[j + 2] = (byte) ((b3 << 6) | b4);        }        if (data.charAt(data.length() - 2) == '=') {            b1 = decodingTable[data.charAt(data.length() - 4)];            b2 = decodingTable[data.charAt(data.length() - 3)];            bytes[bytes.length - 1] = (byte) ((b1 << 2) | (b2 >> 4));        } else if (data.charAt(data.length() - 1) == '=') {            b1 = decodingTable[data.charAt(data.length() - 4)];            b2 = decodingTable[data.charAt(data.length() - 3)];            b3 = decodingTable[data.charAt(data.length() - 2)];            bytes[bytes.length - 2] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 1] = (byte) ((b2 << 4) | (b3 >> 2));        } else {            b1 = decodingTable[data.charAt(data.length() - 4)];            b2 = decodingTable[data.charAt(data.length() - 3)];            b3 = decodingTable[data.charAt(data.length() - 2)];            b4 = decodingTable[data.charAt(data.length() - 1)];            bytes[bytes.length - 3] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 2] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[bytes.length - 1] = (byte) ((b3 << 6) | b4);        }        return bytes;    }     private static byte[] discardNonBase64Bytes(byte[] data) {        byte[] temp = new byte[data.length];        int bytesCopied = 0;        for (int i = 0; i < data.length; i++) {            if (isValidBase64Byte(data[i])) {                temp[bytesCopied++] = data[i];            }        }        byte[] newData = new byte[bytesCopied];        System.arraycopy(temp, 0, newData, 0, bytesCopied);        return newData;    }     private static String discardNonBase64Chars(String data) {        StringBuffer sb = new StringBuffer();        int length = data.length();        for (int i = 0; i < length; i++) {            if (isValidBase64Byte((byte) (data.charAt(i)))) {                sb.append(data.charAt(i));            }        }        return sb.toString();    }     private static boolean isValidBase64Byte(byte b) {        if (b == '=') {            return true;        } else if ((b < 0) || (b >= 128)) {            return false;        } else if (decodingTable[b] == -1) {            return false;        }        return true;    }     // 测试类    public static void main(String[] args) {        String data = "[e-mail]:etpass";        byte[] result = SecBase64.encode(data.getBytes());// 加密        System.out.println("Basic " + data);        System.out.println("Basic " + new String(result));        System.out.println(new String(SecBase64.decode(new String(result))));// 解密    } }