经过一年的黑莓开发，总结一些东西，记录遇到过的一些问题。 这里主要记录跟RSA加密解密有关的问题：黑莓端与java服务器端相互加密 解密 1，首先是填充模式使用 java端RSA/ECB/PKCS1Padding与黑莓端PKCS1FormatterEngine对应，刚开始的时候试过其他的几种 不
这里主要记录跟RSA加密解密有关的问题：黑莓端与java服务器端相互加密 解密
1，首先是填充模式使用 java端RSA/ECB/PKCS1Padding与黑莓端PKCS1FormatterEngine对应，刚开始的时候试过其他的几种 不是java端不支持 就是黑莓端不支持，最后确认两边都支持PKCS1Padding模式。
2，黑莓端的公钥和Modules 与 java端的不同：公钥前面加一个0，Modules前面加两个00,（Modules是我在java服务器端生成的）
String publicKeyExponent="010001"; StringpublicKeyModules="0098565b6f053c21f78c645c64aec952989876279a357efe30ab3c75d482c7ef1c16927b2d5a255a d8beb7059792929885b2054ae005ba4fcaa70da5737e16305d7ecc852802e0360b4ab3c0ba92991a4e41ab49b4403cd46f038c85 9accba8e9229d6dbd8a1ce606b4681d8aea433073bea86ed6514e8600c30e32d94720ddafd";3，在黑莓端加密以后需要到java端解密 所以需要将加密后的数据转后16进制，至于为什么要转换成16进制 感觉是因为RSA的加密机制吧（不太确定）
4，java端的代码是从网上找来的，大致做了一些修改:
a,下面new org.bouncycastle.jce.provider.BouncyCastleProvider()的部分没有的话 int blockSize = cipher.getBlockSize(); 这段代码获取模块大小值就会为0.
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
b,RSA加密使用了填充 但是在某种情况下可能会在密文多出一位,用以下代码解决：（我做WinPhone8的同事也遇到了同样的问题 下面带面也可以解决）
if(raw[0]==0 && raw.length==129)//判断数组首元素是否为0，若是，则将其删除，保证模的位数是128
{
byte[] temp=new byte[raw.length-1];
for(int i=0;i<raw.length-1;i++)
{
temp[i]=raw[i+1];
}
raw=temp;
}
5,在windows服务器与在linux获取秘钥的路径不同参考:
public static String getRSAPairFilePath() {
String urlPath = RSAUtils.class.getResource("/").getPath();
String path=(new File(urlPath).getParent() +File.separator+ RSAKeyStore);
return path;
}
BB6,7端：
import java.io.ByteArrayOutputStream;
import net.rim.device.api.crypto.BlockEncryptor;
import net.rim.device.api.crypto.PKCS1FormatterEngine;
import net.rim.device.api.crypto.RSACryptoSystem;
import net.rim.device.api.crypto.RSAEncryptorEngine;
import net.rim.device.api.crypto.RSAPublicKey;
public class RSACryptUtil {
public static String rsaEncrypt(String content) {
String publicKeyExponent="010001";//公钥
//Modules
String publicKeyModules="0098565b6f053c21f78c645c64aec952989876279a357efe30ab3c75d482c7ef1c16927b2d5a255ad8beb7059792929885b2054ae005ba4fcaa70da5737e16305d7ecc852802e0360b4ab3c0ba92991a4e41ab49b4403cd46f038c859accba8e9229d6dbd8a1ce606b4681d8aea433073bea86ed6514e8600c30e32d94720ddafd";
RSACryptoSystem cryptoSystem;
try {
cryptoSystem = new RSACryptoSystem(1024);// 这个值关系到块加密的大小
RSAPublicKey publicKey=new RSAPublicKey(cryptoSystem, parseHexStr2Byte(publicKeyExponent),
parseHexStr2Byte(publicKeyModules));//将公钥与modules转化为二进制 创建RSAPublicKey对象
RSAEncryptorEngine rsaEngine=new RSAEncryptorEngine(publicKey);
PKCS1FormatterEngine pkcs1Engine=new PKCS1FormatterEngine(rsaEngine);
ByteArrayOutputStream out=new ByteArrayOutputStream();
BlockEncryptor encrypt=new BlockEncryptor(pkcs1Engine, out);
encrypt.write(content.getBytes());
encrypt.close();
out.close();
byte[] bt=out.toByteArray();
return parseByte2HexStr(bt);//转换成16进制.
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**将16进制转换为二进制
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
byte[] result=new byte[hexStr.length()/2];
for(int i=0;i<hexStr.length()/2;i++){
int high=Integer.parseInt(hexStr.substring(i*2, i*2+1),16);
int low=Integer.parseInt(hexStr.substring(i*2+1, i*2+2),16);
result[i]=(byte)(high*16+low);
}
return result;
}
/**将二进制转换成16进制
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb=new StringBuffer();
for(int i=0;i<buf.length;i++){
String hex=Integer.toHexString(buf[i]&0xFF);
if(hex.length()==1){
hex='0'+hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
}
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
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.SecureRandom;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec;
import javax.crypto.Cipher;
public class RSABBSixUtil {
private static String RSAKeyStore = "RSAKey.txt";
/**
* * 生成密钥对 *
*
* @return KeyPair *
* @throws EncryptException
*/
public static KeyPair generateKeyPair() throws Exception {
try {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
final int KEY_SIZE = 1024;// 这个值关系到块加密的大小，可以更改，但是不要太大，否则效率会低
keyPairGen.initialize(KEY_SIZE, new SecureRandom());
KeyPair keyPair = keyPairGen.generateKeyPair();
RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
System.out.println(publicKey.getModulus().toString(16));
System.out.println(publicKey.getPublicExponent().toString(16));
System.out.println(privateKey.getPrivateExponent().toString(16));
System.out.println(publicKey.getPublicExponent().toString(16).length());
System.out.println(privateKey.getPrivateExponent().toString(16).length());
System.out.println("99e28e237fa52ee766e38db10b2bbbcc3fc8f0549781547bbef2d75e952d1f5fda9bb0b61964760fdab21c3f4a940a51e80781da50dd9623ac589a152998e1710b549677e40b74d81bbb039eb8196bda28a9e8c53920f5da1c23e559b9afc39d08dfce7f00fdef88059bec49063f57179628aa259e63d2bf837057b0b25cadf3".length());
saveKeyPair(keyPair);
return keyPair;
} catch (Exception e) {
throw new Exception(e.getMessage());
}
}
public static String getRSAPairFilePath() {
String urlPath = RSAUtils.class.getResource("/").getPath();
String path=(new File(urlPath).getParent() +File.separator+ RSAKeyStore);
return path;//(new File(urlPath).getParent() + RSAKeyStore);
}
public static KeyPair getKeyPair() throws Exception {
String path=getRSAPairFilePath();
System.out.println(path);
FileInputStream fis = new FileInputStream(path);
ObjectInputStream oos = new ObjectInputStream(fis);
KeyPair kp = (KeyPair) oos.readObject();
oos.close();
fis.close();
return kp;
}
public static void saveKeyPair(KeyPair kp) throws Exception {
FileOutputStream fos = new FileOutputStream(RSAKeyStore);
ObjectOutputStream oos = new ObjectOutputStream(fos);
// 生成密钥
oos.writeObject(kp);
oos.close();
fos.close();
}
/**
* * 生成公钥 *
*
* @param modulus *
* @param publicExponent *
* @return RSAPublicKey *
* @throws Exception
*/
public static RSAPublicKey generateRSAPublicKey(byte[] modulus,
byte[] publicExponent) throws Exception {
KeyFactory keyFac = null;
try {
keyFac = KeyFactory.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
} catch (NoSuchAlgorithmException ex) {
throw new Exception(ex.getMessage());
}
RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(
modulus), new BigInteger(publicExponent));
try {
return (RSAPublicKey) keyFac.generatePublic(pubKeySpec);
} catch (InvalidKeySpecException ex) {
throw new Exception(ex.getMessage());
}
}
/**
* * 生成私钥 *
*
* @param modulus *
* @param privateExponent *
* @return RSAPrivateKey *
* @throws Exception
*/
public static RSAPrivateKey generateRSAPrivateKey(byte[] modulus,
byte[] privateExponent) throws Exception {
KeyFactory keyFac = null;
try {
keyFac = KeyFactory.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
} catch (NoSuchAlgorithmException ex) {
throw new Exception(ex.getMessage());
}
RSAPrivateKeySpec priKeySpec = new RSAPrivateKeySpec(new BigInteger(
modulus), new BigInteger(privateExponent));
try {
return (RSAPrivateKey) keyFac.generatePrivate(priKeySpec);
} catch (InvalidKeySpecException ex) {
throw new Exception(ex.getMessage());
}
}
/**
* * 加密 *
*
* @param key
* 加密的密钥 *
* @param data
* 待加密的明文数据 *
* @return 加密后的数据 *
* @throws Exception
*/
public static byte[] encrypt(PublicKey pk, byte[] data) throws Exception {
try {
Cipher cipher = Cipher.getInstance("RSA",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, pk);
int blockSize = cipher.getBlockSize();// 获得加密块大小，如：加密前数据为128个byte，而key_size=1024
// 加密块大小为127
// byte,加密后为128个byte;因此共有2个加密块，第一个127
// byte第二个为1个byte
int outputSize = cipher.getOutputSize(data.length);// 获得加密块加密后块大小
int leavedSize = data.length % blockSize;
int blocksSize = leavedSize != 0 ? data.length / blockSize + 1
: data.length / blockSize;
byte[] raw = new byte[outputSize * blocksSize];
int i = 0;
while (data.length - i * blockSize > 0) {
if (data.length - i * blockSize > blockSize)
cipher.doFinal(data, i * blockSize, blockSize, raw, i
* outputSize);
else
cipher.doFinal(data, i * blockSize, data.length - i
* blockSize, raw, i * outputSize);
// 这里面doUpdate方法不可用，查看源代码后发现每次doUpdate后并没有什么实际动作除了把byte[]放到
// ByteArrayOutputStream中，而最后doFinal的时候才将所有的byte[]进行加密，可是到了此时加密块大小很可能已经超出了
// OutputSize所以只好用dofinal方法。
i++;
}
return raw;
} catch (Exception e) {
throw new Exception(e.getMessage());
}
}
/**
* * 解密 *
*
* @param key
* 解密的密钥 *
* @param raw
* 已经加密的数据 *
* @return 解密后的明文 *
* @throws Exception
*/
public static byte[] decrypt(PrivateKey pk, byte[] raw) throws Exception {
try {
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(cipher.DECRYPT_MODE, pk);
int blockSize = cipher.getBlockSize();
ByteArrayOutputStream bout = new ByteArrayOutputStream(64);
int j = 0;
if(raw[0]==0 && raw.length==129)//判断数组首元素是否为0，若是，则将其删除，保证模的位数是128
{
byte[] temp=new byte[raw.length-1];
for(int i=0;i<raw.length-1;i++)
{
temp[i]=raw[i+1];
}
raw=temp;
}
while (raw.length - j * blockSize > 0) {
bout.write(cipher.doFinal(raw, j * blockSize, blockSize));
j++;
}
return bout.toByteArray();
} catch (Exception e) {
throw new Exception(e.getMessage());
}
}
public static String decrypt(String result) throws Exception{
byte[] en_result = new BigInteger(result, 16).toByteArray();
try{
byte[] de_result = decrypt(getKeyPair().getPrivate(),
en_result);
StringBuffer sb = new StringBuffer();
sb.append(new String(de_result));
String pwd = sb.toString();
return pwd;
}catch(Exception e){
throw new Exception(e.getMessage());
}
}
}
java端代码参考：http://sosuny.iteye.com/blog/793327
BB6,7端代码参考：http://stackoverflow.com/questions/5248590/error-while-using-rsa-encryption-on-blackberry