客户接口是使用的java实现，验证使用的md5withrsa,拆开看都理解，放到一块就懵逼了，求讲解！！！！
附java的实现方式：
<code>package main;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.security.SecureRandom;
public class main {
/**
* 生成秘钥
*/
public static void makeKey()
{
String KEY_ALGORITHM = "rsa";
java.security.KeyPairGenerator keygen;
try {
keygen = java.security.KeyPairGenerator
.getInstance(KEY_ALGORITHM );
SecureRandom secrand = new SecureRandom();
secrand.setSeed("tmriPayment".getBytes()); // 初始化随机产生器
keygen.initialize(1024);
KeyPair keys = keygen.genKeyPair();
RSAPublicKey pubkey = (RSAPublicKey) keys.getPublic();
RSAPrivateKey prikey = (RSAPrivateKey) keys.getPrivate();
String pubKeyStr= Base64Util.encodeBase64(pubkey.getEncoded());//得到公钥 并做base64编码
String priKeyStr= Base64Util.encodeBase64(prikey.getEncoded());//得到私钥 并做base64编码
System.out.println("公钥:"+ pubKeyStr);
System.out.println("私钥:"+ priKeyStr);
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 加密
* @return
*/
public static String encodeData()
{
try {
byte[] data = "fdfdfsdfdfd".getBytes();
String privateKey = "MIICXAIBAAKBgQDOF3dzQpPVIvHrx2qwszcv9Cw5XhCEyuRTy+HDPD684NSGGGnL"+
"34cLc1BCEjlT3v9H81SigvSUDB++YbMcZOrRFT+MAt22yi98BcRP60vgVixfTCCI"+
"lc39b6G6I6ac5BUfOKwdUKNUnCLvcojshmtGezcEYGocMziOIwXIdBXErQIDAQAB"+
"AoGANlycRovuQM9J7v6YFun/Cagnri4wv0ZhefUSpRQUHHBVvtVbuspIbe3J4tO5"+
"yXTN86Ws0n0mlJKqIObWfwvjoDADNeEWFXUI5YKyEnpnvvZwTo1JjrDy8QJpGe94"+
"yNebfGLKyZtIc/zLq9sFboyqNCtn2hu7IsG2g4SGe9BFcsUCQQDnrc6yXG6jmFC/"+
"7HFqXj5NtQc72vYbIjf32yG8W1D1j3ghZZwtUkIa8g3WMxFrYW9DFMzTDi3/mPSd"+
"1A9OG89DAkEA47oFZj6xf7gzDbHDdKX/S9ehjQjP2q6V7SYXnhdEwioxjJpj9qrP"+
"SKQg8A9m4nUl2FXJ2spxApotHoKHqTGFTwJBAIkcohGJBqmnQVL0mgK7l9/hXVCd"+
"O72/OKRlecfBu1449H2/ZvijkB/mVS4Jtyt31KM8siPOZoa4fTzS/ePaLYUCQDHj"+
"LY2hjFbzblPArpXeS5g8y8pOtOIuPu/t2Vyrskdq4OHxbJa8Ap7iPcj5RsuzaDAF"+
"UywYDzvHtLyrUbbR/2cCQGbbIWDLPtzHzI7QumtabHq9M5zUgvtXDksnOltcEDSX"+
"aBoGSbpRcPcGFfFMY+fd/kdmEambYn+270DNHPvqljU=";
byte[] keyBytes;
keyBytes = Base64Util.decodeBase64(privateKey);
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);
Signature signature = Signature.getInstance("MD5withRSA");
signature.initSign(priKey);
signature.update(data);//data为要生成签名的源数据字节数组
return Base64Util.encodeBase64(Base64Util.encodeBase64(signature.sign()).getBytes());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//对私钥做base64解码
return "";
}
/**
* 解密
* @return
*/
public static Boolean decodeData(String msg)
{
String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDMrfAeCg5zyHJKs269vMywoMYwKWGfBbk31K44g0ZLg8YN4c9jOH4hyAYkhN5mWY69Q8Sb82OAlxBXMY1zQshKk6kzZGOrYDQOt/bvVg6kPdf9IgtWky4YaCVSR2C0zYCviz+pHXJrbTeyVVLmbaxsr2lEjamBoDcfM1uE9hj83QIDAQAB";
try {
byte[] data = "fdfdfsdfdfd".getBytes();
byte[] publicKey1 = Base64Util.decodeBase64(publicKey);//对提供的公钥做base64解码
byte[] sign = Base64Util.decodeBase64( new String(Base64Util.decodeBase64(msg)));//签名需要做二次base64解码
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKey1);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PublicKey pubKey = keyFactory.generatePublic(keySpec);
Signature signature = Signature.getInstance("MD5withRSA");
signature.initVerify(pubKey);
signature.update(data);
return signature.verify(sign);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//对私钥做base64解码
return false;
}
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
//makeKey();
String msg = encodeData();
//System.out.println(msg);
//String msg = "ZlBGVnVXQm1YVjhhWDhGbVVYV24raEJzRVB1WFAycUhKdVIwbGl3azY5T2VKWHBkMDlpL1U5aGYwcEVvK1h0M0RNMFNsRTNQM1pYazFyT25xblZwTStRZmJhVGVPUXBsZ0ozZVFKemFnaWt5dzNvUXRNZC81RGQ4RGlSR3pqUmRhOFd2OCt1ekRiakZBdWtqeGg3Y1plTEdTT2ppQ08rcFVqOUQxZXh6ZG1VPQ==";
//Boolean data = decodeData(msg);
//System.out.println(data);
}
}
</code>客户接口是使用的java实现，验证使用的md5withrsa,拆开看都理解，放到一块就懵逼了，求讲解！！！！
附java的实现方式：
<code>package main;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.security.SecureRandom;
public class main {
/**
* 生成秘钥
*/
public static void makeKey()
{
String KEY_ALGORITHM = "rsa";
java.security.KeyPairGenerator keygen;
try {
keygen = java.security.KeyPairGenerator
.getInstance(KEY_ALGORITHM );
SecureRandom secrand = new SecureRandom();
secrand.setSeed("tmriPayment".getBytes()); // 初始化随机产生器
keygen.initialize(1024);
KeyPair keys = keygen.genKeyPair();
RSAPublicKey pubkey = (RSAPublicKey) keys.getPublic();
RSAPrivateKey prikey = (RSAPrivateKey) keys.getPrivate();
String pubKeyStr= Base64Util.encodeBase64(pubkey.getEncoded());//得到公钥 并做base64编码
String priKeyStr= Base64Util.encodeBase64(prikey.getEncoded());//得到私钥 并做base64编码
System.out.println("公钥:"+ pubKeyStr);
System.out.println("私钥:"+ priKeyStr);
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 加密
* @return
*/
public static String encodeData()
{
try {
byte[] data = "fdfdfsdfdfd".getBytes();
String privateKey = "MIICXAIBAAKBgQDOF3dzQpPVIvHrx2qwszcv9Cw5XhCEyuRTy+HDPD684NSGGGnL"+
"34cLc1BCEjlT3v9H81SigvSUDB++YbMcZOrRFT+MAt22yi98BcRP60vgVixfTCCI"+
"lc39b6G6I6ac5BUfOKwdUKNUnCLvcojshmtGezcEYGocMziOIwXIdBXErQIDAQAB"+
"AoGANlycRovuQM9J7v6YFun/Cagnri4wv0ZhefUSpRQUHHBVvtVbuspIbe3J4tO5"+
"yXTN86Ws0n0mlJKqIObWfwvjoDADNeEWFXUI5YKyEnpnvvZwTo1JjrDy8QJpGe94"+
"yNebfGLKyZtIc/zLq9sFboyqNCtn2hu7IsG2g4SGe9BFcsUCQQDnrc6yXG6jmFC/"+
"7HFqXj5NtQc72vYbIjf32yG8W1D1j3ghZZwtUkIa8g3WMxFrYW9DFMzTDi3/mPSd"+
"1A9OG89DAkEA47oFZj6xf7gzDbHDdKX/S9ehjQjP2q6V7SYXnhdEwioxjJpj9qrP"+
"SKQg8A9m4nUl2FXJ2spxApotHoKHqTGFTwJBAIkcohGJBqmnQVL0mgK7l9/hXVCd"+
"O72/OKRlecfBu1449H2/ZvijkB/mVS4Jtyt31KM8siPOZoa4fTzS/ePaLYUCQDHj"+
"LY2hjFbzblPArpXeS5g8y8pOtOIuPu/t2Vyrskdq4OHxbJa8Ap7iPcj5RsuzaDAF"+
"UywYDzvHtLyrUbbR/2cCQGbbIWDLPtzHzI7QumtabHq9M5zUgvtXDksnOltcEDSX"+
"aBoGSbpRcPcGFfFMY+fd/kdmEambYn+270DNHPvqljU=";
byte[] keyBytes;
keyBytes = Base64Util.decodeBase64(privateKey);
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);
Signature signature = Signature.getInstance("MD5withRSA");
signature.initSign(priKey);
signature.update(data);//data为要生成签名的源数据字节数组
return Base64Util.encodeBase64(Base64Util.encodeBase64(signature.sign()).getBytes());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//对私钥做base64解码
return "";
}
/**
* 解密
* @return
*/
public static Boolean decodeData(String msg)
{
String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDMrfAeCg5zyHJKs269vMywoMYwKWGfBbk31K44g0ZLg8YN4c9jOH4hyAYkhN5mWY69Q8Sb82OAlxBXMY1zQshKk6kzZGOrYDQOt/bvVg6kPdf9IgtWky4YaCVSR2C0zYCviz+pHXJrbTeyVVLmbaxsr2lEjamBoDcfM1uE9hj83QIDAQAB";
try {
byte[] data = "fdfdfsdfdfd".getBytes();
byte[] publicKey1 = Base64Util.decodeBase64(publicKey);//对提供的公钥做base64解码
byte[] sign = Base64Util.decodeBase64( new String(Base64Util.decodeBase64(msg)));//签名需要做二次base64解码
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKey1);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PublicKey pubKey = keyFactory.generatePublic(keySpec);
Signature signature = Signature.getInstance("MD5withRSA");
signature.initVerify(pubKey);
signature.update(data);
return signature.verify(sign);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//对私钥做base64解码
return false;
}
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
//makeKey();
String msg = encodeData();
//System.out.println(msg);
//String msg = "ZlBGVnVXQm1YVjhhWDhGbVVYV24raEJzRVB1WFAycUhKdVIwbGl3azY5T2VKWHBkMDlpL1U5aGYwcEVvK1h0M0RNMFNsRTNQM1pYazFyT25xblZwTStRZmJhVGVPUXBsZ0ozZVFKemFnaWt5dzNvUXRNZC81RGQ4RGlSR3pqUmRhOFd2OCt1ekRiakZBdWtqeGg3Y1plTEdTT2ppQ08rcFVqOUQxZXh6ZG1VPQ==";
//Boolean data = decodeData(msg);
//System.out.println(data);
}
}
</code>
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