程序包 gateway.api

类 RSAUtils

java.lang.Object

gateway.api.RSAUtils

public abstract class RSAUtils
extends Object

RSA工具类

作者:

neeker

字段概要

字段

修饰符和类型	字段	说明
private static final String	PEM_PRIVATE_KEY
private static final String	PEM_PUBLIC_KEY
private static final String	RSA_ALGORITHM
static final String	RSA_DEFAULT_TRANSFORMATION

构造器概要

构造器

构造器	说明
RSAUtils()

方法概要

修饰符和类型	方法	说明
static byte[]	decryptData(byte[] cipher_data, int data_offset, int data_len, Key key, String transformation)
static byte[]	decryptData(byte[] cipher_data, Key key, String transformation)
static byte[]	encryptData(byte[] plaint_data, int data_offset, int data_len, Key key, String transformation)
static byte[]	encryptData(byte[] plaint_data, Key key, String transformation)
static KeyPair	generateKeyPair(int keySize)	产生密钥对
static PrivateKey	parsePrivateKey(String key)
static PrivateKey	parsePrivateKeyFromPEM(String pem)
static PublicKey	parsePublicKey(String key)
static PublicKey	parsePublicKeyFromPEM(String pem)	从PEM格式中获得RSA公钥
static byte[]	signData(byte[] digest, int offset, int len, PrivateKey privkey, String algorithm)
static byte[]	signData(byte[] digest, PrivateKey privkey, String algorithm)
static String	toPem(Key key)
static boolean	verifySign(byte[] digest, byte[] sign, PublicKey pubkey, String algorithm)

从类继承的方法 java.lang.Object

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

字段详细资料

RSA_DEFAULT_TRANSFORMATION

public static final String RSA_DEFAULT_TRANSFORMATION

另请参阅:

• 常量字段值

PEM_PUBLIC_KEY

private static final String PEM_PUBLIC_KEY

另请参阅:

• 常量字段值

PEM_PRIVATE_KEY

private static final String PEM_PRIVATE_KEY

另请参阅:

• 常量字段值

RSA_ALGORITHM

private static final String RSA_ALGORITHM

另请参阅:

• 常量字段值

构造器详细资料

RSAUtils

public RSAUtils()

方法详细资料

generateKeyPair

public static KeyPair generateKeyPair(int keySize)

产生密钥对

参数:

keySize - 密钥长度

返回:

KeyPair

parsePublicKeyFromPEM

public static PublicKey parsePublicKeyFromPEM(String pem)

从PEM格式中获得RSA公钥

参数:

pem - 传入的PEM格式

返回:

PublicKey

parsePublicKey

public static PublicKey parsePublicKey(String key)

parsePrivateKey

public static PrivateKey parsePrivateKey(String key)

parsePrivateKeyFromPEM

public static PrivateKey parsePrivateKeyFromPEM(String pem)

参数:

pem - PEM格式

返回:

PrivateKey

verifySign

public static boolean verifySign(byte[] digest,
 byte[] sign,
 PublicKey pubkey,
 String algorithm)
                          throws InvalidKeyException,
SignatureException

参数:

digest - 原始数据

sign - 签名数据

pubkey - 公钥

algorithm - 签名算法

返回:

返回true表示签名正确

抛出:

InvalidKeyException

SignatureException

signData

public static byte[] signData(byte[] digest,
 PrivateKey privkey,
 String algorithm)
                       throws InvalidKeyException,
SignatureException

参数:

digest - 待签名数据

privkey - RSA私钥

algorithm - 签名数据

返回:

已签名数据

抛出:

InvalidKeyException

SignatureException

signData

public static byte[] signData(byte[] digest,
 int offset,
 int len,
 PrivateKey privkey,
 String algorithm)
                       throws InvalidKeyException,
SignatureException

抛出:

InvalidKeyException

SignatureException

decryptData

public static byte[] decryptData(byte[] cipher_data,
 Key key,
 String transformation)
                          throws InvalidKeyException,
NoSuchPaddingException,
IllegalBlockSizeException,
BadPaddingException

参数:

cipher_data - 密文

key - 密钥

返回:

明文

抛出:

InvalidKeyException

NoSuchPaddingException

IllegalBlockSizeException

BadPaddingException

decryptData

public static byte[] decryptData(byte[] cipher_data,
 int data_offset,
 int data_len,
 Key key,
 String transformation)
                          throws InvalidKeyException,
NoSuchPaddingException,
IllegalBlockSizeException,
BadPaddingException

参数:

cipher_data - 密文块

data_offset - 开始索引

data_len - 数据长度

key - 密钥

返回:

明文

抛出:

InvalidKeyException

NoSuchPaddingException

IllegalBlockSizeException

BadPaddingException

encryptData

public static byte[] encryptData(byte[] plaint_data,
 Key key,
 String transformation)
                          throws InvalidKeyException,
NoSuchPaddingException,
IllegalBlockSizeException,
BadPaddingException

参数:

plaint_data - 明文

key - 密钥

返回:

密文

抛出:

InvalidKeyException

NoSuchPaddingException

IllegalBlockSizeException

BadPaddingException

encryptData

public static byte[] encryptData(byte[] plaint_data,
 int data_offset,
 int data_len,
 Key key,
 String transformation)
                          throws InvalidKeyException,
NoSuchPaddingException,
IllegalBlockSizeException,
BadPaddingException

参数:

plaint_data - 明文块

data_offset - 开始索引

data_len - 数据长度

key - 密钥

返回:

抛出:

InvalidKeyException

NoSuchPaddingException

IllegalBlockSizeException

BadPaddingException

toPem

public static String toPem(Key key)