bropen.toolkit.utils.security

Class RSA

java.lang.Object

bropen.toolkit.utils.security.RSA

public class RSA
extends java.lang.Object

RSA 非对称算法加解密工具

示例：
     System.out.println(">> createKeyPair");
     RSA rsa = new RSA();
     Map<String, Object> keyPair = rsa.createKeyPair();
     for (Map.Entry<String, Object> entry : keyPair.entrySet()) {
         System.out.println(entry.getKey() + " == " + entry.getValue());
     }

     String data = "啦啦啦";

     System.out.println(">> encrypt by private key");
     rsa.setPrivateKey((String) keyPair.get(PRIVATE_KEY_B64));
     String encrypted = rsa.encryptToBase64(data);
     System.out.println("encrypted: " + encrypted);

     System.out.println(">> decrypt by public key");
     rsa.setPublicKey((String) keyPair.get(PUBLIC_KEY_B64));
     String decrypted = rsa.decryptString(encrypted);
     System.out.println("decrypted1: " + decrypted);
     System.out.println("decrypted2: " + rsa.decryptString(rsa.encrypt(data.getBytes(CHARSET))));
     System.out.println("equals: " + data.equals(decrypted));

     rsa.encrypt(new FileInputStream("/dev/shm/ramdisk/plain.xls"), new FileOutputStream("/dev/shm/ramdisk/enc"))
     rsa.decrypt(new FileInputStream("/dev/shm/ramdisk/enc"), new FileOutputStream("/dev/shm/ramdisk/dec.xls"))
 

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ALGORITHM
static java.lang.String	BASE64_TYPE_MINE
static java.lang.String	BASE64_TYPE_URLSAFE
static java.nio.charset.Charset	CHARSET
static java.lang.String	PRIVATE_KEY
static java.lang.String	PRIVATE_KEY_B64
static java.lang.String	PUBLIC_KEY
static java.lang.String	PUBLIC_KEY_B64

Constructor Summary

Constructors

Constructor and Description
RSA()

Method Summary

Modifier and Type	Method and Description
java.util.Map<java.lang.String,java.lang.Object>	createKeyPair() 生成 1024 位的公钥和私钥的密钥对
java.util.Map<java.lang.String,java.lang.Object>	createKeyPair(int keysize) 生成公钥和私钥的密钥对
byte[]	decrypt(byte[] encryptedData) 使用公钥进行数据解密
void	decrypt(java.io.InputStream encryptedIs, java.io.OutputStream decryptedOs) 使用公钥进行数据解密
byte[]	decrypt(java.lang.String encryptedStr) 使用公钥对使用 Base64 编码过的数据解密
java.lang.String	decryptString(byte[] encryptedData) 使用公钥进行数据解密，并返回解密后的字符串
java.lang.String	decryptString(java.lang.String encryptedStr) 使用公钥对使用 Base64 编码过的数据解密，并返回解密后的字符串
byte[]	encrypt(byte[] plainData) 使用私钥进行数据加密
void	encrypt(java.io.InputStream plainIs, java.io.OutputStream encryptedOs) 使用私钥进行数据加密
java.lang.String	encryptToBase64(byte[] plainData) 使用私钥对数据加密，并返回 Base64 编码后的字符串
java.lang.String	encryptToBase64(java.lang.String plainStr) 使用私钥对字符串加密，并返回 Base64 编码后的字符串
java.security.interfaces.RSAPrivateKey	getPrivateKey()
java.security.interfaces.RSAPublicKey	getPublicKey()
static void	main(java.lang.String[] args)
RSA	setBase64Type(java.lang.String type) 设置 Base64 的编解码器类型
RSA	setPrivateKey(java.security.interfaces.RSAPrivateKey privateKey) 设置私钥
RSA	setPrivateKey(java.lang.String privateKey) 设置私钥
RSA	setPublicKey(java.security.interfaces.RSAPublicKey publicKey) 设置公钥
RSA	setPublicKey(java.lang.String publicKey) 设置公钥

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CHARSET

public static final java.nio.charset.Charset CHARSET

ALGORITHM

public static final java.lang.String ALGORITHM

See Also:

Constant Field Values

PUBLIC_KEY

public static final java.lang.String PUBLIC_KEY

See Also:

Constant Field Values

PUBLIC_KEY_B64

public static final java.lang.String PUBLIC_KEY_B64

See Also:

Constant Field Values

PRIVATE_KEY

public static final java.lang.String PRIVATE_KEY

See Also:

Constant Field Values

PRIVATE_KEY_B64

public static final java.lang.String PRIVATE_KEY_B64

See Also:

Constant Field Values

BASE64_TYPE_URLSAFE

public static final java.lang.String BASE64_TYPE_URLSAFE

See Also:

Constant Field Values

BASE64_TYPE_MINE

public static final java.lang.String BASE64_TYPE_MINE

See Also:

Constant Field Values

Constructor Detail

RSA

public RSA()

Method Detail

createKeyPair

public java.util.Map<java.lang.String,java.lang.Object> createKeyPair()

生成 1024 位的公钥和私钥的密钥对

Returns:

包含公私钥对象、以及使用 Base64 编码过的公私钥字符串。Map 的键为常量 PUBLIC_KEY[_B64]、PRIVATE_KEY[_B64]。

createKeyPair

public java.util.Map<java.lang.String,java.lang.Object> createKeyPair(int keysize)

生成公钥和私钥的密钥对

Parameters:

keysize - 秘钥位数，如 1024、2048

Returns:

公私钥

setPublicKey

public RSA setPublicKey(java.lang.String publicKey)
                 throws java.security.spec.InvalidKeySpecException

设置公钥

Parameters:

publicKey - 使用 Base64 编码过的公钥

Returns:

this

Throws:

java.security.spec.InvalidKeySpecException - .

setPublicKey

public RSA setPublicKey(java.security.interfaces.RSAPublicKey publicKey)

设置公钥

Parameters:

publicKey - 公钥

Returns:

this

getPublicKey

public java.security.interfaces.RSAPublicKey getPublicKey()

setPrivateKey

public RSA setPrivateKey(java.lang.String privateKey)
                  throws java.security.spec.InvalidKeySpecException

设置私钥

Parameters:

privateKey - 使用 Base64 编码过的私钥

Returns:

this

Throws:

java.security.spec.InvalidKeySpecException - .

setPrivateKey

public RSA setPrivateKey(java.security.interfaces.RSAPrivateKey privateKey)

设置私钥

Parameters:

privateKey - 私钥

Returns:

this

getPrivateKey

public java.security.interfaces.RSAPrivateKey getPrivateKey()

encrypt

public void encrypt(java.io.InputStream plainIs,
                    java.io.OutputStream encryptedOs)
             throws java.security.InvalidKeyException,
                    javax.crypto.BadPaddingException,
                    javax.crypto.IllegalBlockSizeException,
                    java.io.IOException

使用私钥进行数据加密

Parameters:

plainIs - 需要加密的输入流

encryptedOs - 加密后的输出流

Throws:

java.security.InvalidKeyException - .

javax.crypto.BadPaddingException - .

javax.crypto.IllegalBlockSizeException - .

java.io.IOException - .

encrypt

public byte[] encrypt(byte[] plainData)
               throws java.security.InvalidKeyException,
                      javax.crypto.BadPaddingException,
                      javax.crypto.IllegalBlockSizeException

使用私钥进行数据加密

Parameters:

plainData - 需要加密的数据

Returns:

加密后的数据

Throws:

java.security.InvalidKeyException - .

javax.crypto.BadPaddingException - .

javax.crypto.IllegalBlockSizeException - .

encryptToBase64

public java.lang.String encryptToBase64(byte[] plainData)
                                 throws javax.crypto.BadPaddingException,
                                        java.security.InvalidKeyException,
                                        javax.crypto.IllegalBlockSizeException

使用私钥对数据加密，并返回 Base64 编码后的字符串

Parameters:

plainData - 需要加密的数据

Returns:

加密并 Base64 编码后的数据

Throws:

javax.crypto.BadPaddingException - .

java.security.InvalidKeyException - .

javax.crypto.IllegalBlockSizeException - .

encryptToBase64

public java.lang.String encryptToBase64(java.lang.String plainStr)
                                 throws javax.crypto.BadPaddingException,
                                        java.security.InvalidKeyException,
                                        javax.crypto.IllegalBlockSizeException

使用私钥对字符串加密，并返回 Base64 编码后的字符串

Parameters:

plainStr - 需要加密的字符串

Returns:

加密并 Base64 编码后的字符串

Throws:

javax.crypto.BadPaddingException - .

java.security.InvalidKeyException - .

javax.crypto.IllegalBlockSizeException - .

decrypt

public void decrypt(java.io.InputStream encryptedIs,
                    java.io.OutputStream decryptedOs)
             throws java.security.InvalidKeyException,
                    javax.crypto.BadPaddingException,
                    javax.crypto.IllegalBlockSizeException,
                    java.io.IOException

使用公钥进行数据解密

Parameters:

encryptedIs - 已加密的数据输入流

decryptedOs - 解密的数据输出流

Throws:

java.security.InvalidKeyException - .

javax.crypto.BadPaddingException - .

javax.crypto.IllegalBlockSizeException - .

java.io.IOException - .

decrypt

public byte[] decrypt(byte[] encryptedData)
               throws java.security.InvalidKeyException,
                      javax.crypto.BadPaddingException,
                      javax.crypto.IllegalBlockSizeException

使用公钥进行数据解密

Parameters:

encryptedData - 已加密的数据

Returns:

解密的数据

Throws:

java.security.InvalidKeyException - .

javax.crypto.BadPaddingException - .

javax.crypto.IllegalBlockSizeException - .

decrypt

public byte[] decrypt(java.lang.String encryptedStr)
               throws javax.crypto.BadPaddingException,
                      java.security.InvalidKeyException,
                      javax.crypto.IllegalBlockSizeException

使用公钥对使用 Base64 编码过的数据解密

Parameters:

encryptedStr - 已加密并 Base64 编码的数据

Returns:

解密的数据

Throws:

javax.crypto.BadPaddingException - .

java.security.InvalidKeyException - .

javax.crypto.IllegalBlockSizeException - .

decryptString

public java.lang.String decryptString(byte[] encryptedData)
                               throws javax.crypto.BadPaddingException,
                                      java.security.InvalidKeyException,
                                      javax.crypto.IllegalBlockSizeException

使用公钥进行数据解密，并返回解密后的字符串

Parameters:

encryptedData - 已加密的数据

Returns:

解密的数据

Throws:

javax.crypto.BadPaddingException - .

java.security.InvalidKeyException - .

javax.crypto.IllegalBlockSizeException - .

decryptString

public java.lang.String decryptString(java.lang.String encryptedStr)
                               throws javax.crypto.BadPaddingException,
                                      java.security.InvalidKeyException,
                                      javax.crypto.IllegalBlockSizeException

使用公钥对使用 Base64 编码过的数据解密，并返回解密后的字符串

Parameters:

encryptedStr - 已加密并 Base64 编码的数据

Returns:

解密的字符串

Throws:

javax.crypto.BadPaddingException - .

java.security.InvalidKeyException - .

javax.crypto.IllegalBlockSizeException - .

setBase64Type

public RSA setBase64Type(java.lang.String type)

设置 Base64 的编解码器类型

Parameters:

type - 可选 BASE64_TYPE_URLSAFE、BASE64_TYPE_MINE、其他（默认）

Returns:

this

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception