RSA加密突破117长度限制
RSA 加密 突破117长度限制
package com.topnet.utils;import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Map;
import org.apache.commons.io.IOUtils;
/**
* 加密解密工具
*
* @author lpf
*
*/
public class EncryptionTool {
private static String publicKey = null;
private static String privateKey = null;
/**
* 配置公钥
*
* @param publicKey
*/
public static void setPublicKey(String publicKey) {
EncryptionTool.publicKey = publicKey;
}
/**
* 配置私钥
*
* @param privateKey
*/
public static void setPrivateKey(String privateKey) {
EncryptionTool.privateKey = privateKey;
}
public static void main(String[] args) {
String text =
"{"UNISCID":"统一社会信用代码","ENTTYPE":"市场主体类型","OPFROM":"经营(驻在)期限自","OPTO":"经营(驻在)期限至","APPRDATE":"核准日期"}";
String encrypt = encrypt(text);
System.out.println(decrypt(encrypt));;
generatorKey("/home/lpf/myproject/TopEncryption/src/main/resources");
}
/**
* 生成一对密码,放到文件夹
*
* @param folder 文件夹路径
* @return
*/
public static void generatorKey(String folder) {
ByteArrayInputStream in = null;
FileOutputStream out = null;
try {
File f = new File(folder);
if (!f.exists()) {
f.mkdirs();
}
Map<String, String> m = RSACoder.base64Key();
in = new ByteArrayInputStream(m.get("RSAPublicKey").toString().getBytes());
out = new FileOutputStream(folder + File.separator + "publickKey");
// out = new FileOutputStream(folder);
IOUtils.copy(in, out);
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
in = new ByteArrayInputStream(m.get("RSAPrivateKey").toString().getBytes());
out = new FileOutputStream(folder + File.separator + "privateKey");
IOUtils.copy(in, out);
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
}
}
/**
* 加密
*
* @param data
* @return
*/
public static String encrypt(String data) {
try {
return RSACoder.encryptAndBase64ByPublicKey(data, getPublicKey());
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 解密
*
* @param data
* @return
*/
public static String decrypt(String data) {
try {
return new String(
RSACoder.decryptByPrivateKey(RSACoder.decryptBASE64(data), getPrivateKey()));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 得到公要
*
* @return
*/
private static String getPublicKey() {
if (publicKey == null) {
String file =
Thread.currentThread().getContextClassLoader().getResource("publickKey").getFile();
publicKey = getFileTxt(new File(file));
}
return publicKey;
}
/**
* 得到私钥
*
* @return
*/
private static String getPrivateKey() {
if (privateKey == null) {
String file =
Thread.currentThread().getContextClassLoader().getResource("privateKey").getFile();
privateKey = getFileTxt(new File(file));
}
return privateKey;
}
private static String getFileTxt(File file) {
FileInputStream in = null;
ByteArrayOutputStream out = null;
try {
in = new FileInputStream(file);
out = new ByteArrayOutputStream();
IOUtils.copy(in, out);
return out.toString();
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
}
}
}
RSACoder
package com.topnet.utils;import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import javax.crypto.Cipher;
import org.apache.commons.codec.binary.Base64;
/**
* @author lpf 在线密钥http://travistidwell.com/jsencrypt/demo/index.html
* pkcs8转码：http://tool.chacuo.net/cryptrsapkcs1pkcs8
*/
public class RSACoder {
public static final String KEY_ALGORITHM = "RSA";
public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
private static final String PUBLIC_KEY = "RSAPublicKey";
private static final String PRIVATE_KEY = "RSAPrivateKey";
public static void main(String[] args) throws Exception {
String encryptAndBase64ByPublicKey =
RSACoder.encryptAndBase64ByPublicKey("这里445545输入密文", publicKey);
System.out.println(encryptAndBase64ByPublicKey);
byte[] de = RSACoder.decryptBase64AndRSAByPrivateKey(encryptAndBase64ByPublicKey);
System.out.println(new String(de));
de = RSACoder.decryptBase64AndRSAByPrivateKey(
"UfuAgO1OeEJ3rzxrkjZcnwxNtDwDp1yuaEgrDzT6p6cw9FRusZwb8MwCTf+rFVAvitXBUPrV/7Kr/cIoB3u7Fw==");
System.out.println(new String(de));
System.out.println(privateKey);
}
/** 公钥，请换掉这里的key，乱写的 **/
public static String publicKey =
"MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAJK+CtxbfTYxQofcZ48yFb+MabIniIwG"
+ "5lhykq7y20Xe/7lcWQW1qL870LCsuWjlKy/GL+A5G2xta57a4Qy8Z78CAwEAAQ==";
/** 私钥，请换掉这里的key，乱写的 **/
public static String privateKey =
"MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAkr4K3Ft9NjFCh9xn
"
+ "jzIVv4xpsieIjAbmWHKSrvLbRd7/uVxZBbWovzvQsKy5aOUrL8Yv4DkbbG1rntrh
"
+ "DLxnvwIDAQABAkBxuQJlwCmLpCVxcSh421HrfwAy51x1WKuPhEuVdfTlcj1yeqdD
"
+ "I39QEH4ruXuZGNODsJrykRDruu8kW7gR6PmxAiEA1OhTrw3XaRmdDynIJ99UpiMz
"
+ "m7DsbJjmBNqkcR3or/MCIQCwcWhXZefQHbPk4QGVkRUmE3UE2eKvyj7LsCr2lUEo
"
+ "BQIgfn1o+l+m0vI8tX2FROsSR4IybxU14W8VeVzMxceXLrECIBG3ETbVMHUgxlMQ
"
+ "lEwkCO+NvI4EIlJsB+oDggzH54bRAiEAoWP+zcIYPt1F3DSjGJJ0zwdFmuo2gNKE
" + "gn2aM6Yg0Po=";
static {
init();
}
public static void init() {
/**
* 生成key
*/
// Map<String, Key> keyMap;
// try {
// keyMap = RSACoder.initKey();
// publicKey = RSACoder.getPublicKey(keyMap);
// privateKey = RSACoder.getPrivateKey(keyMap);
// } catch (Exception e) {
// // TODO Auto-generated catch block
// logger.error("初始化前端js加密秘钥失败：",e);
// }
// logger.info("公钥:
" + publicKey);
// logger.info("私钥：
" + privateKey);
}
public static byte[] decryptBASE64(String key) {
return Base64.decodeBase64(key.getBytes());
}
public static String encryptBASE64(byte[] bytes) {
return new String(Base64.encodeBase64(bytes));
}
public static byte[] decryptBase64AndRSAByPrivateKey(String data) throws Exception {
return decryptByPrivateKey(RSACoder.decryptBASE64(data), privateKey);
}
/**
* 私钥解密
*
* @param data 要解密的base64编码的数据；
* @param key 私钥的base64编码数据；
* @return
* @throws Exception
*/
public static byte[] decryptAndBase64ByPrivateKey(String data, String key) throws Exception {
return decryptByPrivateKey(RSACoder.decryptBASE64(data), key);
}
/**
* 公钥加密 返回base64字符串
*
* @param data
* @param key
* @return
* @throws Exception
*/
public static String encryptAndBase64ByPublicKey(String data, String key) throws Exception {
return encryptBASE64(encryptByPublicKey(data, key));
}
/**
*
* 用私钥对信息生成数字签名
*
* @param data 加密数据
* @param privateKey 私钥
* @return
* @throws Exception
*/
public static String sign(byte[] data, String privateKey) throws Exception {
// 解密由base64编码的私钥
byte[] keyBytes = decryptBASE64(privateKey);
// 构造PKCS8EncodedKeySpec对象
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
// KEY_ALGORITHM 指定的加密算法
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
// 取私钥匙对象
PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);
// 用私钥对信息生成数字签名
Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
signature.initSign(priKey);
signature.update(data);
return encryptBASE64(signature.sign());
}
/**
* 校验数字签名
*
* @param data 加密数据
* @param publicKey 公钥
* @param sign 数字签名
* @return 校验成功返回true 失败返回false
* @throws Exception
*/
public static boolean verify(byte[] data, String publicKey, String sign) throws Exception {
// 解密由base64编码的公钥
byte[] keyBytes = decryptBASE64(publicKey);
// 构造X509EncodedKeySpec对象
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
// KEY_ALGORITHM 指定的加密算法
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
// 取公钥匙对象
PublicKey pubKey = keyFactory.generatePublic(keySpec);
Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
signature.initVerify(pubKey);
signature.update(data);
// 验证签名是否正常
return signature.verify(decryptBASE64(sign));
}
/**
* 使用私钥解密
*
* @param data
* @param privateKey
* @return
* @throws Exception
*/
public static byte[] decryptByPrivateKey(byte[] data, Key privateKey) throws Exception {
// 对数据解密
Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, privateKey);
byte[] inputArray = data;
int inputLength = inputArray.length;
// 最大加密字节数，超出最大字节数需要分组加密
int MAX_ENCRYPT_BLOCK = 128;
// 标识
int offSet = 0;
byte[] resultBytes = {};
byte[] cache = {};
while (inputLength - offSet > 0) {
if (inputLength - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(inputArray, offSet, MAX_ENCRYPT_BLOCK);
offSet += MAX_ENCRYPT_BLOCK;
} else {
cache = cipher.doFinal(inputArray, offSet, inputLength - offSet);
offSet = inputLength;
}
resultBytes = Arrays.copyOf(resultBytes, resultBytes.length + cache.length);
System.arraycopy(cache, 0, resultBytes, resultBytes.length - cache.length, cache.length);
}
return resultBytes;
}
public static byte[] decryptByPrivateKey(byte[] data, String key) throws Exception {
// 对密钥解密
byte[] keyBytes = decryptBASE64(key);
// 取得私钥
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
return decryptByPrivateKey(data, privateKey);
}
/**
* 解密<br>
* 用私钥解密
*
* @param data
* @param key
* @return
* @throws Exception
*/
public static byte[] decryptByPrivateKey(String data, String key) throws Exception {
return decryptByPrivateKey(decryptBASE64(data), key);
}
/**
* 解密<br>
* 用公钥解密
*
* @param data
* @param key
* @return
* @throws Exception
*/
public static byte[] decryptByPublicKey(byte[] data, String key) throws Exception {
// 对密钥解密
byte[] keyBytes = decryptBASE64(key);
// 取得公钥
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key publicKey = keyFactory.generatePublic(x509KeySpec);
// 对数据解密
Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
cipher.init(Cipher.DECRYPT_MODE, publicKey);
return cipher.doFinal(data);
}
/**
* 加密<br>
* 用公钥加密
*
* @param data
* @param key
* @return
* @throws Exception
*/
public static byte[] encryptByPublicKey(String data, String key) throws Exception {
// 对公钥解密
byte[] keyBytes = decryptBASE64(key);
// 取得公钥
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key publicKey = keyFactory.generatePublic(x509KeySpec);
// 对数据加密
Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
byte[] inputArray = data.getBytes();
int inputLength = inputArray.length;
// 最大加密字节数，超出最大字节数需要分组加密
int MAX_ENCRYPT_BLOCK = 117;
// 标识
int offSet = 0;
byte[] resultBytes = {};
byte[] cache = {};
while (inputLength - offSet > 0) {
if (inputLength - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(inputArray, offSet, MAX_ENCRYPT_BLOCK);
offSet += MAX_ENCRYPT_BLOCK;
} else {
cache = cipher.doFinal(inputArray, offSet, inputLength - offSet);
offSet = inputLength;
}
resultBytes = Arrays.copyOf(resultBytes, resultBytes.length + cache.length);
System.arraycopy(cache, 0, resultBytes, resultBytes.length - cache.length, cache.length);
}
return resultBytes;
}
/**
* 加密<br>
* 用私钥加密
*
* @param data
* @param key
* @return
* @throws Exception
*/
public static byte[] encryptByPrivateKey(byte[] data, String key) throws Exception {
// 对密钥解密
byte[] keyBytes = decryptBASE64(key);
// 取得私钥
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
// 对数据加密
Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
return cipher.doFinal(data);
}
/**
* 取得私钥
*
* @param keyMap
* @return
* @throws Exception
*/
public static String getPrivateKey(Map<String, Key> keyMap) throws Exception {
Key key = keyMap.get(PRIVATE_KEY);
return encryptBASE64(key.getEncoded());
}
/**
* 取得公钥
*
* @param keyMap
* @return
* @throws Exception
*/
public static String getPublicKey(Map<String, Key> keyMap) throws Exception {
Key key = keyMap.get(PUBLIC_KEY);
return encryptBASE64(key.getEncoded());
}
/**
* 初始化密钥
*
* @return
* @throws NoSuchAlgorithmException
* @throws Exception
*/
public static Map<String, Key> initKey() throws NoSuchAlgorithmException {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
keyPairGen.initialize(1024);
KeyPair keyPair = keyPairGen.generateKeyPair();
Map<String, Key> keyMap = new HashMap<String, Key>(2);
keyMap.put(PUBLIC_KEY, keyPair.getPublic());// 公钥
keyMap.put(PRIVATE_KEY, keyPair.getPrivate());// 私钥
return keyMap;
}
public static Map<String, String> base64Key() throws NoSuchAlgorithmException {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
keyPairGen.initialize(1024);
KeyPair keyPair = keyPairGen.generateKeyPair();
Map<String, String> keyMap = new HashMap<String, String>(2);
keyMap.put(PUBLIC_KEY, encryptBASE64(keyPair.getPublic().getEncoded()));// 公钥
keyMap.put(PRIVATE_KEY, encryptBASE64(keyPair.getPrivate().getEncoded()));// 私钥
return keyMap;
}
}
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