加密方式工具类
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package com.framework.util;
import java.io.UnsupportedEncodingException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import android.text.TextUtils;
/**
* 加密方式工具类
*
* @author liujie
*
*/
public class EncryUtil {
/**
* 加密Map集合中的数据，先将参数中Map集合改成TreeMap在拼成key=value形式后加密
* @param map
* @return
*/
public static Map<String,String> getSignStr(Map<String,String> map){
if(map!=null){
StringBuffer sb = new StringBuffer();
TreeMap<String, String> treeMap = new TreeMap<String, String>();
Set<String> map_set = map.keySet();
Iterator<String> iterator = map_set.iterator();
while (iterator.hasNext()) {
String keyString = (String) iterator.next();
String valueString = (String) map.get(keyString);
treeMap.put(keyString, valueString);
}
Set<Map.Entry<String, String>> tree_set = treeMap.entrySet();
Iterator<Map.Entry<String, String>> it = tree_set.iterator();
while (it.hasNext()) {
Map.Entry<String, String> entry =it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
sb.append(k + "=" + v + "&");
}
try {
String signString= MD5(sb.toString(), "utf-8");
map.put("sign", signString);
} catch (Exception e) {
e.printStackTrace();
}
return map;
}else {
return null;
}
}
/**
* MD5加密
*
* @param message
* 要进行MD5加密的字符串
* @return 加密结果为32位字符串
*/
public static String MD5(String message){
MessageDigest messageDigest = null;
StringBuffer md5StrBuff = new StringBuffer();
try {
messageDigest = MessageDigest.getInstance("MD5");
messageDigest.reset();
messageDigest.update(message.getBytes("UTF-8"));
byte[] byteArray = messageDigest.digest();
for (int i = 0; i < byteArray.length; i++) {
if (Integer.toHexString(0xFF & byteArray[i])
.length() == 1)
md5StrBuff.append("0")
.append(Integer.toHexString(0xFF & byteArray[i]));
else
md5StrBuff.append(Integer
.toHexString(0xFF & byteArray[i]));
}
} catch (Exception e) {
e.printStackTrace();
}
return md5StrBuff.toString();
}
/**
* MD5加密
*
* @param message
* 要加密的内容
* @param charsetname
* 编码通畅直接输入("utf-8","gbk")
* @return
* @throws NoSuchAlgorithmException
* @throws UnsupportedEncodingException
* 不支持编码异常
*/
public static String MD5(String message, String charsetName){
String resultString = null;
resultString = new String(message);
try {
MessageDigest md = MessageDigest.getInstance("MD5");
if (TextUtils.isEmpty(charsetName)) {
resultString = byteArrayToHexString(md
.digest(resultString.getBytes()));
} else {
resultString = byteArrayToHexString(md
.digest(resultString
.getBytes(charsetName)));
}
} catch (Exception e) {
e.printStackTrace();
}
return resultString;
}
/** 支持md5加密的方法 */
private static String byteArrayToHexString(byte b[]) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++)
resultSb.append(byteToHexStringMd5(b[i]));
return resultSb.toString();
}
/** 支持md5加密的方法 */
private static String byteToHexStringMd5(byte b) {
int n = b;
if (n < 0)
n += 256;
int d1 = n / 16;
int d2 = n % 16;
return hexDigitsMd5[d1] + hexDigitsMd5[d2];
}
/** 支持md5加密的数组 */
private static final String hexDigitsMd5[] = { "0", "1", "2", "3",
"4", "5", "6", "7", "8", "9", "a", "b", "c", "d",
"e", "f" };
/**************************************************** AES加密 **************************************************/
/** aes加密的内容 */
private static final String AESTYPE = "AES/ECB/PKCS5Padding";// AES/ECB/PKCS5Padding
/**
* AES加密
*
* @param keyStr
* 密钥(16位长度或32位)
* @param plainText
* 要加密的内容
* @return 返回加密成功的string
*/
public static String AES(String keyStr, String plainText) {
byte[] encrypt = null;
try {
Key key = generateKeyAES(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.ENCRYPT_MODE, key);
encrypt = cipher.doFinal(plainText.getBytes());
} catch (Exception e) {
e.printStackTrace();
}
return new String(org.apache.commons.codec.binary.Base64.encodeBase64(encrypt));
}
/**
* AES解密
*
* @param keyStr
* 密钥
* @param encryptData
* 需要解密的内容
* @return 返回解密成功的string
*/
public static String AESdecrypt(String keyStr, String encryptData) {
if (encryptData != null) {
byte[] decrypt = null;
try {
Key key = generateKeyAES(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.DECRYPT_MODE, key);
decrypt = cipher.doFinal(org.apache.commons.codec.binary.Base64.decodeBase64(encryptData
.getBytes()));
} catch (Exception e) {
e.printStackTrace();
}
return new String(decrypt).trim();
} else {
return null;
}
}
/**
* AES加密获取key
*
* @param key
* 密钥
* @return
* @throws Exception
*/
private static Key generateKeyAES(String key) throws Exception {
try {
SecretKeySpec keySpec = new SecretKeySpec(
key.getBytes(), "AES");
return keySpec;
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
/************************************************************************ SHA1值加密 ***************************************/
public static String sha1(String str) {
if (TextUtils.isEmpty(str)) {
return null;
}
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
try {
MessageDigest mdTemp = MessageDigest
.getInstance("SHA1");
mdTemp.update(str.getBytes());
byte[] md = mdTemp.digest();
int j = md.length;
char buf[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
buf[k++] = hexDigits[byte0 >>> 4 & 0xf];
buf[k++] = hexDigits[byte0 & 0xf];
}
return new String(buf);
} catch (Exception e) {
return null;
}
}
/*********************************************************** RSA私钥加密 *******************************************/
public static final String SIGN_ALGORITHMS = "SHA1WithRSA";
public static String RSA(String content, String privateKey) {
String charset = "utf-8";
try {
PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(
Base64.decode(privateKey));
KeyFactory keyf = KeyFactory.getInstance("RSA");
PrivateKey priKey = keyf.generatePrivate(priPKCS8);
java.security.Signature signature = java.security.Signature
.getInstance(SIGN_ALGORITHMS);
signature.initSign(priKey);
signature.update(content.getBytes(charset));
byte[] signed = signature.sign();
return Base64.encode(signed);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static final class Base64 {
static private final int BASELENGTH = 128;
static private final int LOOKUPLENGTH = 64;
static private final int TWENTYFOURBITGROUP = 24;
static private final int EIGHTBIT = 8;
static private final int SIXTEENBIT = 16;
static private final int FOURBYTE = 4;
static private final int SIGN = -128;
static private final char PAD = '=';
static private final boolean fDebug = false;
static final private byte[] base64Alphabet = new byte[BASELENGTH];
static final private char[] lookUpBase64Alphabet = new char[LOOKUPLENGTH];
static {
for (int i = 0; i < BASELENGTH; ++i) {
base64Alphabet[i] = -1;
}
for (int i = 'Z'; i >= 'A'; i--) {
base64Alphabet[i] = (byte) (i - 'A');
}
for (int i = 'z'; i >= 'a'; i--) {
base64Alphabet[i] = (byte) (i - 'a' + 26);
}
for (int i = '9'; i >= '0'; i--) {
base64Alphabet[i] = (byte) (i - '0' + 52);
}
base64Alphabet['+'] = 62;
base64Alphabet['/'] = 63;
for (int i = 0; i <= 25; i++) {
lookUpBase64Alphabet[i] = (char) ('A' + i);
}
for (int i = 26, j = 0; i <= 51; i++, j++) {
lookUpBase64Alphabet[i] = (char) ('a' + j);
}
for (int i = 52, j = 0; i <= 61; i++, j++) {
lookUpBase64Alphabet[i] = (char) ('0' + j);
}
lookUpBase64Alphabet[62] = (char) '+';
lookUpBase64Alphabet[63] = (char) '/';
}
private static boolean isWhiteSpace(char octect) {
return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
}
private static boolean isPad(char octect) {
return (octect == PAD);
}
private static boolean isData(char octect) {
return (octect < BASELENGTH && base64Alphabet[octect] != -1);
}
public static String encode(byte[] binaryData) {
if (binaryData == null) {
return null;
}
int lengthDataBits = binaryData.length * EIGHTBIT;
if (lengthDataBits == 0) {
return "";
}
int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;
int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;
int numberQuartet = fewerThan24bits != 0 ? numberTriplets + 1
: numberTriplets;
char encodedData[] = null;
encodedData = new char[numberQuartet * 4];
byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;
int encodedIndex = 0;
int dataIndex = 0;
if (fDebug) {
System.out.println("number of triplets = " + numberTriplets);
}
for (int i = 0; i < numberTriplets; i++) {
b1 = binaryData[dataIndex++];
b2 = binaryData[dataIndex++];
b3 = binaryData[dataIndex++];
if (fDebug) {
System.out.println("b1= " + b1 + ", b2= " + b2 + ", b3= "
+ b3);
}
l = (byte) (b2 & 0x0f);
k = (byte) (b1 & 0x03);
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
: (byte) ((b1) >> 2 ^ 0xc0);
byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4)
: (byte) ((b2) >> 4 ^ 0xf0);
byte val3 = ((b3 & SIGN) == 0) ? (byte) (b3 >> 6)
: (byte) ((b3) >> 6 ^ 0xfc);
if (fDebug) {
System.out.println("val2 = " + val2);
System.out.println("k4 = " + (k << 4));
System.out.println("vak = " + (val2 | (k << 4)));
}
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[val2
| (k << 4)];
encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2)
| val3];
encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
}
// form integral number of 6-bit groups
if (fewerThan24bits == EIGHTBIT) {
b1 = binaryData[dataIndex];
k = (byte) (b1 & 0x03);
if (fDebug) {
System.out.println("b1=" + b1);
System.out.println("b1<<2 = " + (b1 >> 2));
}
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
: (byte) ((b1) >> 2 ^ 0xc0);
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
encodedData[encodedIndex++] = PAD;
encodedData[encodedIndex++] = PAD;
} else if (fewerThan24bits == SIXTEENBIT) {
b1 = binaryData[dataIndex];
b2 = binaryData[dataIndex + 1];
l = (byte) (b2 & 0x0f);
k = (byte) (b1 & 0x03);
byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
: (byte) ((b1) >> 2 ^ 0xc0);
byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4)
: (byte) ((b2) >> 4 ^ 0xf0);
encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
encodedData[encodedIndex++] = lookUpBase64Alphabet[val2
| (k << 4)];
encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
encodedData[encodedIndex++] = PAD;
}
return new String(encodedData);
}
public static byte[] decode(String encoded) {
if (encoded == null) {
return null;
}
char[] base64Data = encoded.toCharArray();
// remove white spaces
int len = removeWhiteSpace(base64Data);
if (len % FOURBYTE != 0) {
return null;// should be divisible by four
}
int numberQuadruple = (len / FOURBYTE);
if (numberQuadruple == 0) {
return new byte[0];
}
byte decodedData[] = null;
byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
char d1 = 0, d2 = 0, d3 = 0, d4 = 0;
int i = 0;
int encodedIndex = 0;
int dataIndex = 0;
decodedData = new byte[(numberQuadruple) * 3];
for (; i < numberQuadruple - 1; i++) {
if (!isData((d1 = base64Data[dataIndex++]))
|| !isData((d2 = base64Data[dataIndex++]))
|| !isData((d3 = base64Data[dataIndex++]))
|| !isData((d4 = base64Data[dataIndex++]))) {
return null;
}// if found "no data" just return null
b1 = base64Alphabet[d1];
b2 = base64Alphabet[d2];
b3 = base64Alphabet[d3];
b4 = base64Alphabet[d4];
decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
}
if (!isData((d1 = base64Data[dataIndex++]))
|| !isData((d2 = base64Data[dataIndex++]))) {
return null;// if found "no data" just return null
}
b1 = base64Alphabet[d1];
b2 = base64Alphabet[d2];
d3 = base64Data[dataIndex++];
d4 = base64Data[dataIndex++];
if (!isData((d3)) || !isData((d4))) {// Check if they are PAD
// characters
if (isPad(d3) && isPad(d4)) {
if ((b2 & 0xf) != 0)// last 4 bits should be zero
{
return null;
}
byte[] tmp = new byte[i * 3 + 1];
System.arraycopy(decodedData, 0, tmp, 0, i * 3);
tmp[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
return tmp;
} else if (!isPad(d3) && isPad(d4)) {
b3 = base64Alphabet[d3];
if ((b3 & 0x3) != 0)// last 2 bits should be zero
{
return null;
}
byte[] tmp = new byte[i * 3 + 2];
System.arraycopy(decodedData, 0, tmp, 0, i * 3);
tmp[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
tmp[encodedIndex] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
return tmp;
} else {
return null;
}
} else { // No PAD e.g 3cQl
b3 = base64Alphabet[d3];
b4 = base64Alphabet[d4];
decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
}
return decodedData;
}
private static int removeWhiteSpace(char[] data) {
if (data == null) {
return 0;
}
// count characters that's not whitespace
int newSize = 0;
int len = data.length;
for (int i = 0; i < len; i++) {
if (!isWhiteSpace(data[i])) {
data[newSize++] = data[i];
}
}
return newSize;
}
}
}