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		# Conflicts: # epmet-auth/src/main/java/com/epmet/controller/GovWebController.java # epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/RSASignature.javamaster
				 2 changed files with 281 additions and 2 deletions
			
			
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package com.epmet.commons.tools.utils; | 
				
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 | 
				
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import javax.crypto.Cipher; | 
				
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import java.security.*; | 
				
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import java.security.spec.PKCS8EncodedKeySpec; | 
				
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import java.security.spec.X509EncodedKeySpec; | 
				
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import java.util.Base64; | 
				
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 | 
				
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/** | 
				
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 * @author jianjun liu | 
				
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 * @date 2020-06-05 16:48 | 
				
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 **/ | 
				
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 | 
				
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public class RSASignature { | 
				
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 | 
				
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 | 
				
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    //非对称密钥算法
 | 
				
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    private static final String KEY_ALGORITHM = "RSA"; | 
				
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    //密钥长度,在512到65536位之间,建议不要太长,否则速度很慢,生成的加密数据很长
 | 
				
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    private static final int KEY_SIZE = 512; | 
				
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    //字符编码
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    private static final String CHARSET = "UTF-8"; | 
				
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 | 
				
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    /** | 
				
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     * 生成密钥对 | 
				
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     * | 
				
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     * @return KeyPair 密钥对 | 
				
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     */ | 
				
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    public static KeyPair getKeyPair() throws Exception { | 
				
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        return getKeyPair(null); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 生成密钥对 | 
				
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     * | 
				
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     * @param password 生成密钥对的密码 | 
				
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     * @return | 
				
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     * @throws Exception | 
				
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     */ | 
				
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    public static KeyPair getKeyPair(String password) throws Exception { | 
				
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        //实例化密钥生成器
 | 
				
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        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(KEY_ALGORITHM); | 
				
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        //初始化密钥生成器
 | 
				
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        if (password == null) { | 
				
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            keyPairGenerator.initialize(KEY_SIZE); | 
				
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        } else { | 
				
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            SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); | 
				
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            secureRandom.setSeed(password.getBytes(CHARSET)); | 
				
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            keyPairGenerator.initialize(KEY_SIZE, secureRandom); | 
				
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        } | 
				
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        //生成密钥对
 | 
				
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        return keyPairGenerator.generateKeyPair(); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 取得私钥 | 
				
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     * | 
				
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     * @param keyPair 密钥对 | 
				
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     * @return byte[] 私钥 | 
				
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     */ | 
				
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    public static byte[] getPrivateKeyBytes(KeyPair keyPair) { | 
				
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        return keyPair.getPrivate().getEncoded(); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 取得Base64编码的私钥 | 
				
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     * | 
				
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     * @param keyPair 密钥对 | 
				
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     * @return String Base64编码的私钥 | 
				
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     */ | 
				
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    public static String getPrivateKey(KeyPair keyPair) { | 
				
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        return Base64.getEncoder().encodeToString(getPrivateKeyBytes(keyPair)); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 取得公钥 | 
				
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     * | 
				
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     * @param keyPair 密钥对 | 
				
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     * @return byte[] 公钥 | 
				
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     */ | 
				
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    public static byte[] getPublicKeyBytes(KeyPair keyPair) { | 
				
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        return keyPair.getPublic().getEncoded(); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 取得Base64编码的公钥 | 
				
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     * | 
				
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     * @param keyPair 密钥对 | 
				
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     * @return String Base64编码的公钥 | 
				
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     */ | 
				
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    public static String getPublicKey(KeyPair keyPair) { | 
				
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        return Base64.getEncoder().encodeToString(getPublicKeyBytes(keyPair)); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 私钥加密 | 
				
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     * | 
				
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     * @param data       待加密数据 | 
				
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     * @param privateKey 私钥字节数组 | 
				
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     * @return byte[] 加密数据 | 
				
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     */ | 
				
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    public static byte[] encryptByPrivateKey(byte[] data, byte[] privateKey) throws Exception { | 
				
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        //实例化密钥工厂
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        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM); | 
				
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        //生成私钥
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        PrivateKey key = keyFactory.generatePrivate(new PKCS8EncodedKeySpec(privateKey)); | 
				
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        //数据加密
 | 
				
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        Cipher cipher = Cipher.getInstance(KEY_ALGORITHM); | 
				
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        cipher.init(Cipher.ENCRYPT_MODE, key); | 
				
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        return cipher.doFinal(data); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 私钥加密 | 
				
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     * | 
				
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     * @param data       待加密数据 | 
				
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     * @param privateKey Base64编码的私钥 | 
				
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     * @return String Base64编码的加密数据 | 
				
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     */ | 
				
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    public static String encryptByPrivateKey(String data, String privateKey) throws Exception { | 
				
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        byte[] key = Base64.getDecoder().decode(privateKey); | 
				
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        return Base64.getEncoder().encodeToString(encryptByPrivateKey(data.getBytes(CHARSET), key)); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 公钥加密 | 
				
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     * | 
				
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     * @param data      待加密数据 | 
				
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     * @param publicKey 公钥字节数组 | 
				
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     * @return byte[] 加密数据 | 
				
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     */ | 
				
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    public static byte[] encryptByPublicKey(byte[] data, byte[] publicKey) throws Exception { | 
				
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        //实例化密钥工厂
 | 
				
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        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM); | 
				
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        //生成公钥
 | 
				
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        PublicKey key = keyFactory.generatePublic(new X509EncodedKeySpec(publicKey)); | 
				
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        //数据加密
 | 
				
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        Cipher cipher = Cipher.getInstance(KEY_ALGORITHM); | 
				
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        cipher.init(Cipher.ENCRYPT_MODE, key); | 
				
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        return cipher.doFinal(data); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 公钥加密 | 
				
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     * | 
				
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     * @param data      待加密数据 | 
				
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     * @param publicKey Base64编码的公钥 | 
				
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     * @return String Base64编码的加密数据 | 
				
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     */ | 
				
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    public static String encryptByPublicKey(String data, String publicKey) throws Exception { | 
				
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        byte[] key = Base64.getDecoder().decode(publicKey); | 
				
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        return Base64.getEncoder().encodeToString(encryptByPublicKey(data.getBytes(CHARSET), key)); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 私钥解密 | 
				
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     * | 
				
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     * @param data       待解密数据 | 
				
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     * @param privateKey 私钥字节数组 | 
				
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     * @return byte[] 解密数据 | 
				
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     */ | 
				
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    public static byte[] decryptByPrivateKey(byte[] data, byte[] privateKey) throws Exception { | 
				
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        //实例化密钥工厂
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        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM); | 
				
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        //生成私钥
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        PrivateKey key = keyFactory.generatePrivate(new PKCS8EncodedKeySpec(privateKey)); | 
				
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        //数据解密
 | 
				
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        Cipher cipher = Cipher.getInstance(KEY_ALGORITHM); | 
				
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        cipher.init(Cipher.DECRYPT_MODE, key); | 
				
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        return cipher.doFinal(data); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 私钥解密 | 
				
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     * | 
				
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     * @param data       Base64编码的待解密数据 | 
				
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     * @param privateKey Base64编码的私钥 | 
				
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     * @return String 解密数据 | 
				
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     */ | 
				
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    public static String decryptByPrivateKey(String data, String privateKey) throws Exception { | 
				
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        byte[] key = Base64.getDecoder().decode(privateKey); | 
				
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        return new String(decryptByPrivateKey(Base64.getDecoder().decode(data), key), CHARSET); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 公钥解密 | 
				
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     * | 
				
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     * @param data      待解密数据 | 
				
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     * @param publicKey 公钥字节数组 | 
				
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     * @return byte[] 解密数据 | 
				
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     */ | 
				
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    public static byte[] decryptByPublicKey(byte[] data, byte[] publicKey) throws Exception { | 
				
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        //实例化密钥工厂
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        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM); | 
				
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        //产生公钥
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        PublicKey key = keyFactory.generatePublic(new X509EncodedKeySpec(publicKey)); | 
				
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        //数据解密
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        Cipher cipher = Cipher.getInstance(KEY_ALGORITHM); | 
				
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        cipher.init(Cipher.DECRYPT_MODE, key); | 
				
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        return cipher.doFinal(data); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 公钥解密 | 
				
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     * | 
				
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     * @param data      Base64编码的待解密数据 | 
				
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     * @param publicKey Base64编码的公钥 | 
				
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     * @return String 解密数据 | 
				
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     */ | 
				
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    public static String decryptByPublicKey(String data, String publicKey) throws Exception { | 
				
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        byte[] key = Base64.getDecoder().decode(publicKey); | 
				
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        return new String(decryptByPublicKey(Base64.getDecoder().decode(data), key), CHARSET); | 
				
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    } | 
				
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 | 
				
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    /** | 
				
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     * 测试加解密方法 | 
				
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     * | 
				
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     * @param args | 
				
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     * @throws Exception | 
				
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     */ | 
				
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    public static void main(String[] args) throws Exception { | 
				
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        //生成密钥对,一般生成之后可以放到配置文件中
 | 
				
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        KeyPair keyPair = RSASignature.getKeyPair(); | 
				
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        //公钥
 | 
				
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        String publicKey = RSASignature.getPublicKey(keyPair); | 
				
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        //私钥
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        String privateKey = RSASignature.getPrivateKey(keyPair); | 
				
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 | 
				
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        System.out.println("公钥:\n" + publicKey); | 
				
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        System.out.println("私钥:\n" + privateKey); | 
				
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 | 
				
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        String data = "RSA 加解密测试!"; | 
				
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        { | 
				
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            System.out.println("\n===========私钥加密,公钥解密=============="); | 
				
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            String s1 = RSASignature.encryptByPrivateKey(data, privateKey); | 
				
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            System.out.println("加密后的数据:" + s1); | 
				
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            String s2 = RSASignature.decryptByPublicKey(s1, publicKey); | 
				
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            System.out.println("解密后的数据:" + s2 + "\n\n"); | 
				
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        } | 
				
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        //=====
 | 
				
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        { | 
				
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            System.out.println("\n===========公钥加密,私钥解密=============="); | 
				
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            String s1 = RSASignature.encryptByPublicKey(data, publicKey); | 
				
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            System.out.println("加密后的数据:" + s1); | 
				
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            String s2 = RSASignature.decryptByPrivateKey(s1, privateKey); | 
				
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            System.out.println("解密后的数据:" + s2 + "\n\n"); | 
				
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        } | 
				
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 | 
				
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    } | 
				
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 | 
				
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} | 
				
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