由于项目要用到非对称加密解密签名校验什么的,于是参考《Java加密解密的艺术》写一个RSA进行加密解密签名及校验的Demo,代码很简单,特此分享!
RSA加密解密类:
- package com.ihep;
- import java.io.BufferedReader;
- import java.io.BufferedWriter;
- import java.io.FileReader;
- import java.io.FileWriter;
- import java.io.IOException;
- import java.security.InvalidKeyException;
- import java.security.KeyFactory;
- import java.security.KeyPair;
- import java.security.KeyPairGenerator;
- import java.security.NoSuchAlgorithmException;
- import java.security.SecureRandom;
- import java.security.interfaces.RSAPrivateKey;
- import java.security.interfaces.RSAPublicKey;
- import java.security.spec.InvalidKeySpecException;
- import java.security.spec.PKCS8EncodedKeySpec;
- import java.security.spec.X509EncodedKeySpec;
- import javax.crypto.BadPaddingException;
- import javax.crypto.Cipher;
- import javax.crypto.IllegalBlockSizeException;
- import javax.crypto.NoSuchPaddingException;
- import com.fcplay.Base64;
- public class RSAEncrypt {
- /**
- * 字节数据转字符串专用集合
- */
- private static final char[] HEX_CHAR = { '0', '1', '2', '3', '4', '5', '6',
- '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
- /**
- * 随机生成密钥对
- */
- public static void genKeyPair(String filePath) {
- // KeyPairGenerator类用于生成公钥和私钥对,基于RSA算法生成对象
- KeyPairGenerator keyPairGen = null;
- try {
- keyPairGen = KeyPairGenerator.getInstance("RSA");
- } catch (NoSuchAlgorithmException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- // 初始化密钥对生成器,密钥大小为96-1024位
- keyPairGen.initialize(1024,new SecureRandom());
- // 生成一个密钥对,保存在keyPair中
- KeyPair keyPair = keyPairGen.generateKeyPair();
- // 得到私钥
- RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
- // 得到公钥
- RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
- try {
- // 得到公钥字符串
- String publicKeyString = Base64.encode(publicKey.getEncoded());
- // 得到私钥字符串
- String privateKeyString = Base64.encode(privateKey.getEncoded());
- // 将密钥对写入到文件
- FileWriter pubfw = new FileWriter(filePath + "/publicKey.keystore");
- FileWriter prifw = new FileWriter(filePath + "/privateKey.keystore");
- BufferedWriter pubbw = new BufferedWriter(pubfw);
- BufferedWriter pribw = new BufferedWriter(prifw);
- pubbw.write(publicKeyString);
- pribw.write(privateKeyString);
- pubbw.flush();
- pubbw.close();
- pubfw.close();
- pribw.flush();
- pribw.close();
- prifw.close();
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- /**
- * 从文件中输入流中加载公钥
- *
- * @param in
- * 公钥输入流
- * @throws Exception
- * 加载公钥时产生的异常
- */
- public static String loadPublicKeyByFile(String path) throws Exception {
- try {
- BufferedReader br = new BufferedReader(new FileReader(path
- + "/publicKey.keystore"));
- String readLine = null;
- StringBuilder sb = new StringBuilder();
- while ((readLine = br.readLine()) != null) {
- sb.append(readLine);
- }
- br.close();
- return sb.toString();
- } catch (IOException e) {
- throw new Exception("公钥数据流读取错误");
- } catch (NullPointerException e) {
- throw new Exception("公钥输入流为空");
- }
- }
- /**
- * 从字符串中加载公钥
- *
- * @param publicKeyStr
- * 公钥数据字符串
- * @throws Exception
- * 加载公钥时产生的异常
- */
- public static RSAPublicKey loadPublicKeyByStr(String publicKeyStr)
- throws Exception {
- try {
- byte[] buffer = Base64.decode(publicKeyStr);
- KeyFactory keyFactory = KeyFactory.getInstance("RSA");
- X509EncodedKeySpec keySpec = new X509EncodedKeySpec(buffer);
- return (RSAPublicKey) keyFactory.generatePublic(keySpec);
- } catch (NoSuchAlgorithmException e) {
- throw new Exception("无此算法");
- } catch (InvalidKeySpecException e) {
- throw new Exception("公钥非法");
- } catch (NullPointerException e) {
- throw new Exception("公钥数据为空");
- }
- }
- /**
- * 从文件中加载私钥
- *
- * @param keyFileName
- * 私钥文件名
- * @return 是否成功
- * @throws Exception
- */
- public static String loadPrivateKeyByFile(String path) throws Exception {
- try {
- BufferedReader br = new BufferedReader(new FileReader(path
- + "/privateKey.keystore"));
- String readLine = null;
- StringBuilder sb = new StringBuilder();
- while ((readLine = br.readLine()) != null) {
- sb.append(readLine);
- }
- br.close();
- return sb.toString();
- } catch (IOException e) {
- throw new Exception("私钥数据读取错误");
- } catch (NullPointerException e) {
- throw new Exception("私钥输入流为空");
- }
- }
- public static RSAPrivateKey loadPrivateKeyByStr(String privateKeyStr)
- throws Exception {
- try {
- byte[] buffer = Base64.decode(privateKeyStr);
- PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(buffer);
- KeyFactory keyFactory = KeyFactory.getInstance("RSA");
- return (RSAPrivateKey) keyFactory.generatePrivate(keySpec);
- } catch (NoSuchAlgorithmException e) {
- throw new Exception("无此算法");
- } catch (InvalidKeySpecException e) {
- throw new Exception("私钥非法");
- } catch (NullPointerException e) {
- throw new Exception("私钥数据为空");
- }
- }
- /**
- * 公钥加密过程
- *
- * @param publicKey
- * 公钥
- * @param plainTextData
- * 明文数据
- * @return
- * @throws Exception
- * 加密过程中的异常信息
- */
- public static byte[] encrypt(RSAPublicKey publicKey, byte[] plainTextData)
- throws Exception {
- if (publicKey == null) {
- throw new Exception("加密公钥为空, 请设置");
- }
- Cipher cipher = null;
- try {
- // 使用默认RSA
- cipher = Cipher.getInstance("RSA");
- // cipher= Cipher.getInstance("RSA", new BouncyCastleProvider());
- cipher.init(Cipher.ENCRYPT_MODE, publicKey);
- byte[] output = cipher.doFinal(plainTextData);
- return output;
- } catch (NoSuchAlgorithmException e) {
- throw new Exception("无此加密算法");
- } catch (NoSuchPaddingException e) {
- e.printStackTrace();
- return null;
- } catch (InvalidKeyException e) {
- throw new Exception("加密公钥非法,请检查");
- } catch (IllegalBlockSizeException e) {
- throw new Exception("明文长度非法");
- } catch (BadPaddingException e) {
- throw new Exception("明文数据已损坏");
- }
- }
- /**
- * 私钥加密过程
- *
- * @param privateKey
- * 私钥
- * @param plainTextData
- * 明文数据
- * @return
- * @throws Exception
- * 加密过程中的异常信息
- */
- public static byte[] encrypt(RSAPrivateKey privateKey, byte[] plainTextData)
- throws Exception {
- if (privateKey == null) {
- throw new Exception("加密私钥为空, 请设置");
- }
- Cipher cipher = null;
- try {
- // 使用默认RSA
- cipher = Cipher.getInstance("RSA");
- cipher.init(Cipher.ENCRYPT_MODE, privateKey);
- byte[] output = cipher.doFinal(plainTextData);
- return output;
- } catch (NoSuchAlgorithmException e) {
- throw new Exception("无此加密算法");
- } catch (NoSuchPaddingException e) {
- e.printStackTrace();
- return null;
- } catch (InvalidKeyException e) {
- throw new Exception("加密私钥非法,请检查");
- } catch (IllegalBlockSizeException e) {
- throw new Exception("明文长度非法");
- } catch (BadPaddingException e) {
- throw new Exception("明文数据已损坏");
- }
- }
- /**
- * 私钥解密过程
- *
- * @param privateKey
- * 私钥
- * @param cipherData
- * 密文数据
- * @return 明文
- * @throws Exception
- * 解密过程中的异常信息
- */
- public static byte[] decrypt(RSAPrivateKey privateKey, byte[] cipherData)
- throws Exception {
- if (privateKey == null) {
- throw new Exception("解密私钥为空, 请设置");
- }
- Cipher cipher = null;
- try {
- // 使用默认RSA
- cipher = Cipher.getInstance("RSA");
- // cipher= Cipher.getInstance("RSA", new BouncyCastleProvider());
- cipher.init(Cipher.DECRYPT_MODE, privateKey);
- byte[] output = cipher.doFinal(cipherData);
- return output;
- } catch (NoSuchAlgorithmException e) {
- throw new Exception("无此解密算法");
- } catch (NoSuchPaddingException e) {
- e.printStackTrace();
- return null;
- } catch (InvalidKeyException e) {
- throw new Exception("解密私钥非法,请检查");
- } catch (IllegalBlockSizeException e) {
- throw new Exception("密文长度非法");
- } catch (BadPaddingException e) {
- throw new Exception("密文数据已损坏");
- }
- }
- /**
- * 公钥解密过程
- *
- * @param publicKey
- * 公钥
- * @param cipherData
- * 密文数据
- * @return 明文
- * @throws Exception
- * 解密过程中的异常信息
- */
- public static byte[] decrypt(RSAPublicKey publicKey, byte[] cipherData)
- throws Exception {
- if (publicKey == null) {
- throw new Exception("解密公钥为空, 请设置");
- }
- Cipher cipher = null;
- try {
- // 使用默认RSA
- cipher = Cipher.getInstance("RSA");
- // cipher= Cipher.getInstance("RSA", new BouncyCastleProvider());
- cipher.init(Cipher.DECRYPT_MODE, publicKey);
- byte[] output = cipher.doFinal(cipherData);
- return output;
- } catch (NoSuchAlgorithmException e) {
- throw new Exception("无此解密算法");
- } catch (NoSuchPaddingException e) {
- e.printStackTrace();
- return null;
- } catch (InvalidKeyException e) {
- throw new Exception("解密公钥非法,请检查");
- } catch (IllegalBlockSizeException e) {
- throw new Exception("密文长度非法");
- } catch (BadPaddingException e) {
- throw new Exception("密文数据已损坏");
- }
- }
- /**
- * 字节数据转十六进制字符串
- *
- * @param data
- * 输入数据
- * @return 十六进制内容
- */
- public static String byteArrayToString(byte[] data) {
- StringBuilder stringBuilder = new StringBuilder();
- for (int i = 0; i < data.length; i++) {
- // 取出字节的高四位 作为索引得到相应的十六进制标识符 注意无符号右移
- stringBuilder.append(HEX_CHAR[(data[i] & 0xf0) >>> 4]);
- // 取出字节的低四位 作为索引得到相应的十六进制标识符
- stringBuilder.append(HEX_CHAR[(data[i] & 0x0f)]);
- if (i < data.length - 1) {
- stringBuilder.append(' ');
- }
- }
- return stringBuilder.toString();
- }
- }
签名及校验类:
- package com.ihep;
- import java.security.KeyFactory;
- import java.security.PrivateKey;
- import java.security.PublicKey;
- import java.security.spec.PKCS8EncodedKeySpec;
- import java.security.spec.X509EncodedKeySpec;
- /**
- * RSA签名验签类
- */
- public class RSASignature{
- /**
- * 签名算法
- */
- public static final String SIGN_ALGORITHMS = "SHA1WithRSA";
- /**
- * RSA签名
- * @param content 待签名数据
- * @param privateKey 商户私钥
- * @param encode 字符集编码
- * @return 签名值
- */
- public static String sign(String content, String privateKey, String encode)
- {
- 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(encode));
- byte[] signed = signature.sign();
- return Base64.encode(signed);
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- return null;
- }
- public static String sign(String content, String privateKey)
- {
- 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());
- byte[] signed = signature.sign();
- return Base64.encode(signed);
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- return null;
- }
- /**
- * RSA验签名检查
- * @param content 待签名数据
- * @param sign 签名值
- * @param publicKey 分配给开发商公钥
- * @param encode 字符集编码
- * @return 布尔值
- */
- public static boolean doCheck(String content, String sign, String publicKey,String encode)
- {
- try
- {
- KeyFactory keyFactory = KeyFactory.getInstance("RSA");
- byte[] encodedKey = Base64.decode(publicKey);
- PublicKey pubKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey));
- java.security.Signature signature = java.security.Signature
- .getInstance(SIGN_ALGORITHMS);
- signature.initVerify(pubKey);
- signature.update( content.getBytes(encode) );
- boolean bverify = signature.verify( Base64.decode(sign) );
- return bverify;
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- return false;
- }
- public static boolean doCheck(String content, String sign, String publicKey)
- {
- try
- {
- KeyFactory keyFactory = KeyFactory.getInstance("RSA");
- byte[] encodedKey = Base64.decode(publicKey);
- PublicKey pubKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey));
- java.security.Signature signature = java.security.Signature
- .getInstance(SIGN_ALGORITHMS);
- signature.initVerify(pubKey);
- signature.update( content.getBytes() );
- boolean bverify = signature.verify( Base64.decode(sign) );
- return bverify;
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- return false;
- }
- }
再来一个Base64的类,当然你也可以用commons-codec-1.9.jar
- package com.ihep;
- public 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);
- }
- /**
- * Encodes hex octects into Base64
- *
- * @param binaryData Array containing binaryData
- * @return Encoded Base64 array
- */
- 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);
- }
- /**
- * Decodes Base64 data into octects
- *
- * @param encoded string containing Base64 data
- * @return Array containind decoded data.
- */
- 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;
- }
- /**
- * remove WhiteSpace from MIME containing encoded Base64 data.
- *
- * @param data the byte array of base64 data (with WS)
- * @return the new length
- */
- 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;
- }
- }
最后是一个MainTest:
- package com.ihep;
- public class MainTest {
- public static void main(String[] args) throws Exception {
- String filepath="G:/tmp/";
- //RSAEncrypt.genKeyPair(filepath);
- System.out.println("--------------公钥加密私钥解密过程-------------------");
- String plainText="ihep_公钥加密私钥解密";
- //公钥加密过程
- byte[] cipherData=RSAEncrypt.encrypt(RSAEncrypt.loadPublicKeyByStr(RSAEncrypt.loadPublicKeyByFile(filepath)),plainText.getBytes());
- String cipher=Base64.encode(cipherData);
- //私钥解密过程
- byte[] res=RSAEncrypt.decrypt(RSAEncrypt.loadPrivateKeyByStr(RSAEncrypt.loadPrivateKeyByFile(filepath)), Base64.decode(cipher));
- String restr=new String(res);
- System.out.println("原文:"+plainText);
- System.out.println("加密:"+cipher);
- System.out.println("解密:"+restr);
- System.out.println();
- System.out.println("--------------私钥加密公钥解密过程-------------------");
- plainText="ihep_私钥加密公钥解密";
- //私钥加密过程
- cipherData=RSAEncrypt.encrypt(RSAEncrypt.loadPrivateKeyByStr(RSAEncrypt.loadPrivateKeyByFile(filepath)),plainText.getBytes());
- cipher=Base64.encode(cipherData);
- //公钥解密过程
- res=RSAEncrypt.decrypt(RSAEncrypt.loadPublicKeyByStr(RSAEncrypt.loadPublicKeyByFile(filepath)), Base64.decode(cipher));
- restr=new String(res);
- System.out.println("原文:"+plainText);
- System.out.println("加密:"+cipher);
- System.out.println("解密:"+restr);
- System.out.println();
- System.out.println("---------------私钥签名过程------------------");
- String content="ihep_这是用于签名的原始数据";
- String signstr=RSASignature.sign(content,RSAEncrypt.loadPrivateKeyByFile(filepath));
- System.out.println("签名原串:"+content);
- System.out.println("签名串:"+signstr);
- System.out.println();
- System.out.println("---------------公钥校验签名------------------");
- System.out.println("签名原串:"+content);
- System.out.println("签名串:"+signstr);
- System.out.println("验签结果:"+RSASignature.doCheck(content, signstr, RSAEncrypt.loadPublicKeyByFile(filepath)));
- System.out.println();
- }
- }
看看运行截图:
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