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java与.net平台之间进行RSA加密验证

發布時間：2023/12/20 编程问答 28 豆豆

生活随笔收集整理的這篇文章主要介紹了 java与.net平台之间进行RSA加密验证小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

RSA加密算法雖然不分平臺，標準都是一樣的，但是各個平臺的實現方式都不盡相同，下面來我來說說
java與.net平臺之間該如何進行RSA加密驗證，
即java端加密-》.net端驗證和.net端加密-》java端驗證。

我對RSA算法也只是停留在應用的層面，所以我就以應用的角度來說說這個過程。
首先，我們來看一下java端的私鑰和公鑰的樣子：
私鑰：

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

公鑰：

MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+lSTeGZH2QN2jz4Cgt8Wqk/8mU+RTpUOUxoOoXlag1RBx1Sx9RPhxBJlprk79p4M/aWW88vSlpCaVefVtXYDR0kpOe+VY1AL9AYWVxUh9JZ4NpmdkOf9nVcSrAEoydm0IhBlA/CzuSqWi5X0KaNwDaLwWb1LR8OXsXoJ8l8mWwwIDAQAB

我們再來看一下.net端的私鑰和公鑰的樣子：
私鑰：

<RSAKeyValue><Modulus>vpUk3hmR9kDdo8+AoLfFqpP/JlPkU6VDlMaDqF5WoNUQcdUsfUT4cQSZaa5O/aeDP2llvPL0paQmlXn1bV2A0dJKTnvlWNQC/QGFlcVIfSWeDaZnZDn/Z1XEqwBKMnZtCIQZQPws7kqlouV9CmjcA2i8Fm9S0fDl7F6CfJfJlsM=</Modulus><Exponent>AQAB</Exponent>+94gtho2crq+GpiUDyunfpA5SdHWMslL0GtL3epn6D50AziKmsgWrnksFiKSyPy+3lLj/Qgxa8kLXQb1qg/3QQ==<Q>wbWcrybn0eaxiPZacZLZXzXO8g12hYoXT1h0DTLvy1rnVUOspNfKZcBZMjPxT4+QEknoTShSnSbJ5sHitfZxAw==</Q><DP>0yVTbPYqoSHWTvuMW+9v2hVUQYNtO2Qvb4kTr/VbqIH6xdx3reyBv0CL6f6P6XihFkaNJMnijIadRR6ZgjkiQQ==</DP><DQ>gPSTa3L+DxmCBQjj6wn01dJvg2p9BaeJnxPmpkbLplhM+tFDpLXXkud7OdWkhu+u3M4A7SSz4tTIwms+rx5x2w==</DQ><InverseQ>4NxLLg6UCAoCpXMgqqZHWMgbMwNNFr9diCWP/tZ5OJmWYHgn7zfqMXa/RNaethjdG1biIkj5h7qm6XDBBqGuxw==</InverseQ><D>r7YEWr1KhLcDYg9jMUqd9QokOSspnTEGoPlx016/EeO/GKSJMynOwSyTYQszisvRxzoecdmyU7GHXVMnQ2Ds7WvbcuNkIRWmxFa4nTkk2zNF6KByvvFwLiW4LQXF6B+uV7+ZNqvfhCoD/j2wki8jfWkuuAaKnTda/axHMi+zRYE=</D></RSAKeyValue>

公鑰：

所以，只要將一邊的公鑰和私鑰轉換成另一邊的即可。
我的做法是將java端的公鑰和私鑰轉換成.net端的公鑰和私鑰。

咱們先看私鑰的轉換：

//?---?Returns?XML?encoded?RSA?private?key?string?suitable?for?.NET
????//?CryptoServiceProvider.FromXmlString(true)?------
????//?---?Leading?zero?bytes?(most?significant)?must?be?removed?for?XML
????//?encoding?for?.NET;?otherwise?format?error?---

????private?String?getRSAPrivateKeyAsNetFormat(byte[]?encodedPrivkey)?{
????????try?{
????????????StringBuffer?buff?=?new?StringBuffer(1024);

????????????PKCS8EncodedKeySpec?pvkKeySpec?=?new?PKCS8EncodedKeySpec(
????????????????????encodedPrivkey);
????????????KeyFactory?keyFactory?=?KeyFactory.getInstance("RSA");
????????????RSAPrivateCrtKey?pvkKey?=?(RSAPrivateCrtKey)?keyFactory
????????????????????.generatePrivate(pvkKeySpec);

????????????buff.append("<RSAKeyValue>");
????????????buff.append("<Modulus>"
????????????????????+?b64encode(removeMSZero(pvkKey.getModulus().toByteArray()))
????????????????????+?"</Modulus>");

????????????buff.append("<Exponent>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPublicExponent()
????????????????????????????.toByteArray()))?+?"</Exponent>");

????????????buff.append(""
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeP().toByteArray()))
????????????????????+?"");

????????????buff.append("<Q>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeQ().toByteArray()))
????????????????????+?"</Q>");

????????????buff.append("<DP>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeExponentP()
????????????????????????????.toByteArray()))?+?"</DP>");

????????????buff.append("<DQ>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeExponentQ()
????????????????????????????.toByteArray()))?+?"</DQ>");

????????????buff.append("<InverseQ>"
????????????????????+?b64encode(removeMSZero(pvkKey.getCrtCoefficient()
????????????????????????????.toByteArray()))?+?"</InverseQ>");

????????????buff.append("<D>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrivateExponent()
????????????????????????????.toByteArray()))?+?"</D>");
????????????buff.append("</RSAKeyValue>");

????????????return?buff.toString().replaceAll("[?\t\n\r]",?"");
????????}?catch?(Exception?e)?{
????????????System.err.println(e);
????????????return?null;
????????}
????}

再看公鑰的轉換：

//?---?Returns?XML?encoded?RSA?public?key?string?suitable?for?.NET
????//?CryptoServiceProvider.FromXmlString(true)?------
????//?---?Leading?zero?bytes?(most?significant)?must?be?removed?for?XML
????//?encoding?for?.NET;?otherwise?format?error?---

????private?String?getRSAPublicKeyAsNetFormat(byte[]?encodedPrivkey)?{
????????try?{
????????????StringBuffer?buff?=?new?StringBuffer(1024);

????????????PKCS8EncodedKeySpec?pvkKeySpec?=?new?PKCS8EncodedKeySpec(
????????????????????encodedPrivkey);
????????????KeyFactory?keyFactory?=?KeyFactory.getInstance("RSA");
????????????RSAPrivateCrtKey?pvkKey?=?(RSAPrivateCrtKey)?keyFactory
????????????????????.generatePrivate(pvkKeySpec);
????????????buff.append("<RSAKeyValue>");
????????????buff.append("<Modulus>"
????????????????????+?b64encode(removeMSZero(pvkKey.getModulus().toByteArray()))
????????????????????+?"</Modulus>");
????????????buff.append("<Exponent>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPublicExponent()
????????????????????????????.toByteArray()))?+?"</Exponent>");
????????????buff.append("</RSAKeyValue>");
????????????return?buff.toString().replaceAll("[?\t\n\r]",?"");
????????}?catch?(Exception?e)?{
????????????System.err.println(e);
????????????return?null;
????????}
????}

通過以上兩個方法，就可以將java端的公鑰和私鑰轉換為.net端的了。
然后.net端可以用如下代碼裝載轉換好的key

?//java端轉換為.net端的私鑰?
????????????????string?NET_PRIVATE_KEY?=?@"<RSAKeyValue><Modulus>lKc3QnhdBGrA+Tkz0QvbgEWHDjS/AMp4bhwqFgQXdo+mIwC/8POr8GpgCpsY2GgU+PBIFI51q2U64aKFwQYQhxSiQI3r7kAa5+DVQVhheRlAaHz/iRMr2HqVkxqtjoTbNjVCMuTqgX7xu30YDcX9ZXSH0lGWCy3NEdzxBpOAtFk=</Modulus><Exponent>AQAB</Exponent>3eX5uQZalJF/tgosNUUV8ss4aVAwDntID63Ta6bFEnZFzp3YckXKGzmOQuygHK0tuUviN+BQFlk0eelMz3JMiQ==<Q>q3+YtH0B30ijTITtGWqNI+zXbhpodhVuugWHkihz9XKFQ7srbYA3YovvyOmK1Q/zlF92X3MFfUjRFWB/fEVVUQ==</Q><DP>Ey1tB7Ck43Ivt2vppjDyVKl7lp53iMje0XwUaZlgLthJ8DF0I2wkq3Wt9dq9e7z71qfYRTv9r/DFuEORf9xBAQ==</DP><DQ>n2ynDSmkIugIfeqX6meluv7BqWW9NABqhVz8kT8vxLzn63XEQi/NzLtfdbq8x6HjgktX5BUtxjB5xVCGUoS1cQ==</DQ><InverseQ>FNZDF90zR/2b/kevm4DomVTs7Iz/oaidOFsLQqD4BZfycuMdpTMAO8UUVtK5+eL7G24JaJAmb1U6QfkTc4syOQ==</InverseQ><D>cVf2aHZB5kZHkT+uZKx31xwsWAabxEyc+sf6xwKjqUDqWjIOJ/iDlzJkvHF5xjfGFfGP5CyjR+ZNuREkjwLCwjBiOhp34QMuN22LbKfHsvgHYiAOqkTxwASQ2FwaonA8nrfluHZhWECMrOSYag2QWuaOoToF91XvkNf8tBFcHQE=</D></RSAKeyValue>";
????????????????//java端轉換為.net端的公鑰?????
????????????????//string?NET_PUBLIC_KEY?=?@"<RSAKeyValue><Modulus>vpUk3hmR9kDdo8+AoLfFqpP/JlPkU6VDlMaDqF5WoNUQcdUsfUT4cQSZaa5O/aeDP2llvPL0paQmlXn1bV2A0dJKTnvlWNQC/QGFlcVIfSWeDaZnZDn/Z1XEqwBKMnZtCIQZQPws7kqlouV9CmjcA2i8Fm9S0fDl7F6CfJfJlsM=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
????????????????RSA?=?new?RSACryptoServiceProvider();
????????????????RSA.FromXmlString(NET_PRIVATE_KEY);
???????????????//RSA.FromXmlString(NET_PUBLIC_KEY);

注意，如果.net端只是驗證，可以只導入NET_PUBLIC_KEY;如果.net端既加密又驗證，那么只導入NET_PRIVATE_KEY即可，不用導入NET_PUBLIC_KEY。

下面給出完整代碼及使用說明：
使用說明：
1.使用java端的GenerateKeys方法，生成java端和.net端需要的公鑰和私鑰
2.java端調用Sign方法進行加密，調用Verify方法進行驗證
3..net端調用signData方法進行加密，調用verifySignature方法進行驗證

.net端c#代碼：

using?System;
using?System.Security.Cryptography;
using?System.IO;
using?System.Text;
using?System.Xml;
using?System.Web;
namespace?RSASecurity
{
????class?ssosign
????{
????????private?RSAParameters?RSAKeyInfo;
????????private?static?RSACryptoServiceProvider?RSA=null;
????????//私鑰
????????private?const?string?NET_PRIVATE_KEY?=?@"<RSAKeyValue><Modulus>lKc3QnhdBGrA+Tkz0QvbgEWHDjS/AMp4bhwqFgQXdo+mIwC/8POr8GpgCpsY2GgU+PBIFI51q2U64aKFwQYQhxSiQI3r7kAa5+DVQVhheRlAaHz/iRMr2HqVkxqtjoTbNjVCMuTqgX7xu30YDcX9ZXSH0lGWCy3NEdzxBpOAtFk=</Modulus><Exponent>AQAB</Exponent>3eX5uQZalJF/tgosNUUV8ss4aVAwDntID63Ta6bFEnZFzp3YckXKGzmOQuygHK0tuUviN+BQFlk0eelMz3JMiQ==<Q>q3+YtH0B30ijTITtGWqNI+zXbhpodhVuugWHkihz9XKFQ7srbYA3YovvyOmK1Q/zlF92X3MFfUjRFWB/fEVVUQ==</Q><DP>Ey1tB7Ck43Ivt2vppjDyVKl7lp53iMje0XwUaZlgLthJ8DF0I2wkq3Wt9dq9e7z71qfYRTv9r/DFuEORf9xBAQ==</DP><DQ>n2ynDSmkIugIfeqX6meluv7BqWW9NABqhVz8kT8vxLzn63XEQi/NzLtfdbq8x6HjgktX5BUtxjB5xVCGUoS1cQ==</DQ><InverseQ>FNZDF90zR/2b/kevm4DomVTs7Iz/oaidOFsLQqD4BZfycuMdpTMAO8UUVtK5+eL7G24JaJAmb1U6QfkTc4syOQ==</InverseQ><D>cVf2aHZB5kZHkT+uZKx31xwsWAabxEyc+sf6xwKjqUDqWjIOJ/iDlzJkvHF5xjfGFfGP5CyjR+ZNuREkjwLCwjBiOhp34QMuN22LbKfHsvgHYiAOqkTxwASQ2FwaonA8nrfluHZhWECMrOSYag2QWuaOoToF91XvkNf8tBFcHQE=</D></RSAKeyValue>";
????????//公鑰參數
????????private?const?string?PUB_KEY_MODULES?=?@"1lpnLvumD8/NedJ7s4WS8UO9OORbXVTgJXmfa72bI4A1L1l6Np91BETQ+yB8Fq6iGWw5OR8OB2UbRBcopb2etepDqWd7kmCtbVT36kTW+E8dWdaVjbI2BCXEGaXuzPPdGOlp52OaawYR5zyG0MiCvJ4jE7RDJax4Cl24ZqPUs4U=";
????????//公鑰參數
????????private?const?string?PUB_KEY_EXP?=?@"AQAB";
????????///?<summary>
????????///?Reads?the?Public?key?file?and?Loads?the?RSAParameters?with?the?
????????///?Modulous?and?Exponent?data.
????????///?</summary>
????????public?ssosign(RSAType?type)
????????{
????????????
????????????RSA?=?new?RSACryptoServiceProvider();
????????????//if?(type?==?RSAType.ITDMS)
????????????//{
????????????//????RSAKeyInfo?=?new?RSAParameters();
????????????//????RSAKeyInfo.Modulus?=?Convert.FromBase64String(PUB_KEY_MODULES);
????????????//????RSAKeyInfo.Exponent?=?Convert.FromBase64String(PUB_KEY_EXP);
????????????//????RSA.ImportParameters(RSAKeyInfo);
????????????//}
????????????//else?//type?==?RSAType.RSP
????????????//{?
????????????????RSA.FromXmlString(NET_PRIVATE_KEY);
????????????//}
????????}
????????///?<summary>
????????///?sign?the?data
????????///?</summary>
????????///?<param?name="dataToBeSigned"></param>
????????///?<returns></returns>
????????public?string?signData(string?dataToBeSigned)
????????{
????????????byte[]?data?=?Encoding.UTF8.GetBytes(dataToBeSigned);

????????????byte[]?endata?=?RSA.SignData(data,"SHA1");

????????????return?Convert.ToBase64String(endata);
???????????
????????}
????????///?<summary>
????????///?Verifies?the?signature?for?a?given?data.
????????///?</summary>
????????///?<param?name="signature">Signature?data?in?Base64</param>
????????///?<param?name="signedData">Original?data?in?BASE64</param>
????????///?<returns>True?if?signature?is?valid?else?False</returns>
????????public?bool?verifySignature(string?signature,string?signedData)
????????{
????????????byte[]?sign?=?Convert.FromBase64String(signature);
????????????return?verifySignature(sign,signedData);
????????}
????????///?<summary>
????????///?Verifies?the?signature?for?a?given?data.
????????///?</summary>
????????///?<param?name="signature">The?signature?</param>
????????///?<param?name="signedData">Original?data?in?Base64</param>
????????///?<returns></returns>
????????public?bool?verifySignature(byte[]?signature?,?string?signedData)
????????{
????????????try
????????????{
????????????????byte[]?hash?=?Convert.FromBase64String(signedData);
????????????????if(RSA.VerifyData(hash,"SHA1",signature))
????????????????{
????????????????????return?true;
????????????????}
????????????????else
????????????????{
????????????????????//Console.WriteLine("The?signature?is?not?valid.");
????????????????????return?false;
????????????????}
????????????}
????????????catch(Exception?e)????
????????????{
????????????????Console.WriteLine(e.Message);
????????????????return?false;
????????????}
????????}

????????///?<summary>
????????///?The?main?entry?point?for?the?application.
????????///?</summary>
????????[STAThread]
????????static?void?Main()
????????{
????????????ssosign?sso?=?new?ssosign(RSAType.RSP);
????????????string?user?=?"limt";
????????????string?time?=?"2010-12-01?11:00:00";
????????????string?data?=?user?+?time;
????????????string?endata?=?Convert.ToBase64String(Encoding.UTF8.GetBytes(data));
????????????//string?ensignature?=?@"SjAoGfsw+vjTLOEC7eXq+V41Q6UNdRXVIdD+5gTbEfy8tfE8cgDIZRn4uIAydYfqprhJ2GbJnTTpQZxOJ0PsQR9TUVVGp0QmbNOJc/Zjm0kuBBwF43ESTSMe0CpXqOLMpLasP7hEdJlVgcrEIXijde0GxSD7qZ+6Ty8P0istR1Y=";
????????????string?ensignature?=?sso.signData(data);

????????????bool?result?=?sso.verifySignature(ensignature,?endata);

????????????Console.WriteLine("Data?is?validate:?"?+?result);
????????????//string?str?=?HttpUtility.UrlDecode("MDEyMzQ1Njc4OTAxMjM0NTY3ODkwMTIzNDU2Nzg5MDEyMzQ1Njc4OQ%3D%3D",Encoding.UTF8);
????????????//Console.WriteLine(str);
????????????Console.ReadLine();
????????}
????}
}

java端代碼：

package?rsa;

import?java.security.*;
import?java.security.spec.*;
import?java.io.*;
import?java.security.interfaces.*;

import?org.castor.util.Base64Decoder;
import?org.castor.util.Base64Encoder;

public?class?ssosign?{

????private?KeyPairGenerator?keyGen;?//?Key?pair?generator?for?RSA
????private?PrivateKey?privateKey;?//?Private?Key?Class
????private?PublicKey?publicKey;?//?Public?Key?Class
????private?KeyPair?keypair;?//?KeyPair?Class
????private?Signature?sign;?//?Signature,?used?to?sign?the?data

????/**
?????*?Default?Constructor.?Instantiates?the?signature?algorithm.
?????*/
????public?ssosign()?{
????????try?{
????????????//?Get?the?instance?of?Signature?Engine.
????????????sign?=?Signature.getInstance("SHA1withRSA");
????????}?catch?(NoSuchAlgorithmException?nsa)?{
????????????System.out.println(""?+?nsa.getMessage());
????????}
????}

????/**
?????*?Signs?the?data?and?return?the?signature?for?a?given?data.
?????*?
?????*?@param?user
?????*????????????The?current?user’s?external?person?number
?????*?@param?time
?????*????????????The?current?time?in?string?format:?yyyy-mm-dd?hh:mm:ss
?????*?@param?EncodedCert
?????*????????????The?hard?coded?certificate?string,?i.e.?private?key
?????*?@return?String?URLEncode?string?of?Signature
?????*?@throws?UnsupportedEncodingException
?????*/
????public?String?Sign(String?user,?String?time,?String?EncodedCert)?{

????????String?returnStr?=?"";
????????try?{
????????????String?toBeSigned?=?user?+?time;
????????????byte[]?signature?=?signData(toBeSigned.getBytes(),?EncodedCert);
????????????String?base64Signature?=?b64encode(signature);
????????????returnStr?=?base64Signature;//?java.net.URLEncoder.encode(base64Signature,
????????????????????????????????????????//?"UTF-8");
????????}
????????//?catch?(UnsupportedEncodingException?ue)?{
????????//?//?TODO?Auto-generated?catch?block
????????//?System.out.println(ue.getMessage());
????????//?}
????????catch?(Exception?e)?{
????????????System.out.println(e);
????????}
????????return?returnStr;
????}

????public?boolean?Verify(String?base64signature,?String?user,?String?time,
????????????String?EncodedCert)?{
????????String?toBeSigned?=?user?+?time;
????????//?try?{
????????//?base64signature?=?java.net.URLDecoder.decode(base64signature,
????????//?"UTF-8");
????????//?}?catch?(UnsupportedEncodingException?e)?{
????????//?//?TODO?Auto-generated?catch?block
????????//?e.printStackTrace();
????????//?}
????????byte[]?signature?=?b64decode(base64signature);
????????return?verifySignature(signature,?toBeSigned.getBytes(),?EncodedCert);
????}

????/**
?????*?Generates?the?keys?for?given?size.
?????*?
?????*?@param?size
?????*????????????Key?Size?[512|1024]
?????*?@param?privateKeyPath
?????*????????????Private?key?will?be?generated?in?file?which?can?be?named?with
?????*????????????"privateKeyPath"?parameter;
?????*?@param?publicKeyPath
?????*????????????Public?key?will?be?generated?in?file?which?can?be?named?with
?????*????????????"publicKeyPath"?parameter;
?????*?@param?netPublicKeyPath
?????*????????????Public?key?can?be?read?for?.Net?platform?will?be?generated?in
?????*????????????file?which?can?be?named?with?"netPublicKeyPath"?parameter;
?????*/
????public?void?GenerateKeys(int?size,?String?privateKeyPath,
????????????String?publicKeyPath,?String?netPublicKeyPath,
????????????String?netPrivateKeyPath)?{
????????try?{
????????????System.out.println("Generatign?Keys");
????????????//?Get?Key?Pair?Generator?for?RSA.
????????????keyGen?=?KeyPairGenerator.getInstance("RSA");
????????????keyGen.initialize(size);
????????????keypair?=?keyGen.genKeyPair();
????????????privateKey?=?keypair.getPrivate();
????????????publicKey?=?keypair.getPublic();

????????????//?Get?the?bytes?of?the?public?and?private?keys
????????????byte[]?privateKeyBytes?=?privateKey.getEncoded();
????????????byte[]?publicKeyBytes?=?publicKey.getEncoded();

????????????//?write?bytes?to?corresponding?files.
????????????writeKeyBytesToFile(b64encode(privateKeyBytes).getBytes(),
????????????????????privateKeyPath);
????????????String?encodedValue?=?b64encode(publicKeyBytes);
????????????writeKeyBytesToFile(encodedValue.getBytes(),?publicKeyPath);

????????????//?Generate?the?Private?Key,?Public?Key?and?Public?Key?in?XML
????????????//?format.
????????????PrivateKey?privateKey?=?KeyFactory.getInstance("RSA")
????????????????????.generatePrivate(new?PKCS8EncodedKeySpec(privateKeyBytes));
????????????PublicKey?publicKey?=?KeyFactory.getInstance("RSA").generatePublic(
????????????????????new?X509EncodedKeySpec(publicKeyBytes));
????????????//?RSAPublicKey?rsaPublicKey?=?(RSAPublicKey)
????????????//?KeyFactory.getInstance(
????????????//?"RSA").generatePublic(
????????????//?new?X509EncodedKeySpec(publicKeyBytes));
????????????//?//?get?the?modules?and?exponent?of?public?key?to?make?compatible
????????????//?//?.Net?public?key?file
????????????//?String?netPublicKey?=?getRSAPublicKeyAsNetFormat(rsaPublicKey);
????????????//?Store?the?modules?and?exponent?(Generated?.Net?public?key?file)
????????????//?in?file
????????????//?writeKeyBytesToFile(netPublicKey.getBytes(),?netPublicKeyPath);

????????????String?netPrivateKey?=?getRSAPrivateKeyAsNetFormat(privateKeyBytes);
????????????writeKeyBytesToFile(netPrivateKey.getBytes(),?netPrivateKeyPath);

????????????String?netPublicKey?=?getRSAPublicKeyAsNetFormat(privateKeyBytes);
????????????writeKeyBytesToFile(netPublicKey.getBytes(),?netPublicKeyPath);

????????}?catch?(java.security.NoSuchAlgorithmException?e)?{
????????????System.out
????????????????????.println("No?such?algorithm.?Please?check?the?JDK?version."
????????????????????????????+?e.getCause());
????????}?catch?(java.security.spec.InvalidKeySpecException?ik)?{
????????????System.out.println("Invalid?Key?Specs.?Not?valid?Key?files."
????????????????????+?ik.getCause());
????????}?catch?(UnsupportedEncodingException?ex)?{
????????????System.out.println(ex);
????????}?catch?(IOException?ioe)?{
????????????System.out.println("Files?not?found?on?specified?path.?"
????????????????????+?ioe.getCause());
????????}?catch?(Exception?ex1)?{
????????????System.out.println(ex1);
????????}

????}

????/**
?????*?Initialize?only?the?private?key.
?????*/
????private?void?initializePrivateKey(String?privateKeyStr)?{
????????try?{
????????????//?Read?key?files?back?and?decode?them?from?BASE64
????????????byte[]?privateKeyBytes?=?b64decode(privateKeyStr);

????????????//?Convert?back?to?public?and?private?key?objects
????????????KeyFactory?keyFactory?=?KeyFactory.getInstance("RSA");
????????????EncodedKeySpec?privateKeySpec?=?new?PKCS8EncodedKeySpec(
????????????????????privateKeyBytes);
????????????privateKey?=?keyFactory.generatePrivate(privateKeySpec);
????????}?catch?(InvalidKeySpecException?e)?{
????????????System.out.println("Invalid?Key?Specs.?Not?valid?Key?files."
????????????????????+?e.getCause());
????????}?catch?(NoSuchAlgorithmException?e)?{
????????????System.out
????????????????????.println("There?is?no?such?algorithm.?Please?check?the?JDK?ver."
????????????????????????????+?e.getCause());
????????}
????}

????/**
?????*?Signs?the?data?and?return?the?signature?for?a?given?data.
?????*?
?????*?@param?toBeSigned
?????*????????????Data?to?be?signed
?????*?@return?byte[]?Signature
?????*/
????private?byte[]?signData(byte[]?toBeSigned,?String?EncodedCert)?{
????????if?(privateKey?==?null)?{
????????????initializePrivateKey(EncodedCert);
????????}
????????try?{
????????????Signature?rsa?=?Signature.getInstance("SHA1withRSA");
????????????rsa.initSign(privateKey);
????????????rsa.update(toBeSigned);
????????????return?rsa.sign();
????????}?catch?(NoSuchAlgorithmException?ex)?{
????????????System.out.println(ex);
????????}?catch?(InvalidKeyException?in)?{
????????????System.out
????????????????????.println("Invalid?Key?file.Please?check?the?key?file?path"
????????????????????????????+?in.getCause());
????????}?catch?(SignatureException?se)?{
????????????System.out.println(se);
????????}
????????return?null;
????}

????/**
?????*?Verifies?the?signature?for?the?given?bytes?using?the?public?key.
?????*?
?????*?@param?signature
?????*????????????Signature
?????*?@param?data
?????*????????????Data?that?was?signed
?????*?@param?EncodedCert
?????*????????????public?key?string
?????*?@return?boolean?True?if?valid?signature?else?false
?????*/
????private?boolean?verifySignature(byte[]?signature,?byte[]?data,
????????????String?EncodedCert)?{
????????try?{
????????????initializePublicKey(EncodedCert);
????????????sign.initVerify(publicKey);
????????????sign.update(data);
????????????return?sign.verify(signature);
????????}?catch?(SignatureException?e)?{
????????????e.printStackTrace();
????????}?catch?(InvalidKeyException?e)?{
????????}

????????return?false;
????}

????/**
?????*?Initializes?the?public?and?private?keys.
?????*/
????private?void?initializePublicKey(String?publicKeyStr)?{
????????try?{
????????????//?Read?key?files?back?and?decode?them?from?BASE64
????????????byte[]?publicKeyBytes?=?b64decode(publicKeyStr);

????????????//?Convert?back?to?public?and?private?key?objects
????????????KeyFactory?keyFactory?=?KeyFactory.getInstance("RSA");

????????????EncodedKeySpec?publicKeySpec?=?new?X509EncodedKeySpec(
????????????????????publicKeyBytes);
????????????publicKey?=?keyFactory.generatePublic(publicKeySpec);

????????}?catch?(InvalidKeySpecException?e)?{
????????????System.out.println("Invalid?Key?Specs.?Not?valid?Key?files."
????????????????????+?e.getCause());
????????}?catch?(NoSuchAlgorithmException?e)?{
????????????System.out
????????????????????.println("There?is?no?such?algorithm.?Please?check?the?JDK?ver."
????????????????????????????+?e.getCause());
????????}
????}

//????/**
//?????*?Gets?the?RSA?Public?Key.?The?key?idea?is?to?make?the?key?readable?for
//?????*?.Net?platform.
//?????*?
//?????*?@param?key
//?????*????????????RSAPublicKey
//?????*?@return?String?the?public?key?that?.Net?platform?can?read
//?????*/
//????private?String?getRSAPublicKeyAsNetFormat(RSAPublicKey?key)?{
//
//????????byte[]?modulusBytes?=?key.getModulus().toByteArray();
//????????modulusBytes?=?stripLeadingZeros(modulusBytes);
//????????String?modules?=?b64encode(modulusBytes);
//
//????????byte[]?exponentBytes?=?key.getPublicExponent().toByteArray();
//????????String?exponent?=?b64encode(exponentBytes);
//
//????????String?result?=?"modules?:?"?+?modules?+?"\r\n"?+?"exponent?:?"
//????????????????+?exponent;
//????????return?result;
//????}

????/**
?????*?Utility?method?to?delete?the?leading?zeros?from?the?modulus.
?????*?
?????*?@param?a
?????*????????????modulus
?????*?@return?modulus
?????*/
????private?byte[]?stripLeadingZeros(byte[]?a)?{
????????int?lastZero?=?-1;
????????for?(int?i?=?0;?i?<?a.length;?i++)?{
????????????if?(a[i]?==?0)?{
????????????????lastZero?=?i;
????????????}?else?{
????????????????break;
????????????}
????????}
????????lastZero++;
????????byte[]?result?=?new?byte[a.length?-?lastZero];
????????System.arraycopy(a,?lastZero,?result,?0,?result.length);
????????return?result;
????}

????/**
?????*?Writes?the?bytes?of?the?key?in?a?file.
?????*?
?????*?@param?key
?????*????????????byte?array?of?key?data.
?????*?@param?file
?????*????????????File?Name
?????*/
????private?void?writeKeyBytesToFile(byte[]?key,?String?file)
????????????throws?IOException?{
????????OutputStream?out?=?new?FileOutputStream(file);
????????out.write(key);
????????out.close();
????}

????//?---?Returns?XML?encoded?RSA?private?key?string?suitable?for?.NET
????//?CryptoServiceProvider.FromXmlString(true)?------
????//?---?Leading?zero?bytes?(most?significant)?must?be?removed?for?XML
????//?encoding?for?.NET;?otherwise?format?error?---

????private?String?getRSAPrivateKeyAsNetFormat(byte[]?encodedPrivkey)?{
????????try?{
????????????StringBuffer?buff?=?new?StringBuffer(1024);

????????????PKCS8EncodedKeySpec?pvkKeySpec?=?new?PKCS8EncodedKeySpec(
????????????????????encodedPrivkey);
????????????KeyFactory?keyFactory?=?KeyFactory.getInstance("RSA");
????????????RSAPrivateCrtKey?pvkKey?=?(RSAPrivateCrtKey)?keyFactory
????????????????????.generatePrivate(pvkKeySpec);

????????????buff.append("<RSAKeyValue>");
????????????buff.append("<Modulus>"
????????????????????+?b64encode(removeMSZero(pvkKey.getModulus().toByteArray()))
????????????????????+?"</Modulus>");

????????????buff.append("<Exponent>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPublicExponent()
????????????????????????????.toByteArray()))?+?"</Exponent>");

????????????buff.append(""
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeP().toByteArray()))
????????????????????+?"");

????????????buff.append("<Q>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeQ().toByteArray()))
????????????????????+?"</Q>");

????????????buff.append("<DP>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeExponentP()
????????????????????????????.toByteArray()))?+?"</DP>");

????????????buff.append("<DQ>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrimeExponentQ()
????????????????????????????.toByteArray()))?+?"</DQ>");

????????????buff.append("<InverseQ>"
????????????????????+?b64encode(removeMSZero(pvkKey.getCrtCoefficient()
????????????????????????????.toByteArray()))?+?"</InverseQ>");

????????????buff.append("<D>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPrivateExponent()
????????????????????????????.toByteArray()))?+?"</D>");
????????????buff.append("</RSAKeyValue>");

????????????return?buff.toString().replaceAll("[?\t\n\r]",?"");
????????}?catch?(Exception?e)?{
????????????System.err.println(e);
????????????return?null;
????????}
????}

????//?---?Returns?XML?encoded?RSA?public?key?string?suitable?for?.NET
????//?CryptoServiceProvider.FromXmlString(true)?------
????//?---?Leading?zero?bytes?(most?significant)?must?be?removed?for?XML
????//?encoding?for?.NET;?otherwise?format?error?---

????private?String?getRSAPublicKeyAsNetFormat(byte[]?encodedPrivkey)?{
????????try?{
????????????StringBuffer?buff?=?new?StringBuffer(1024);

????????????PKCS8EncodedKeySpec?pvkKeySpec?=?new?PKCS8EncodedKeySpec(
????????????????????encodedPrivkey);
????????????KeyFactory?keyFactory?=?KeyFactory.getInstance("RSA");
????????????RSAPrivateCrtKey?pvkKey?=?(RSAPrivateCrtKey)?keyFactory
????????????????????.generatePrivate(pvkKeySpec);
????????????buff.append("<RSAKeyValue>");
????????????buff.append("<Modulus>"
????????????????????+?b64encode(removeMSZero(pvkKey.getModulus().toByteArray()))
????????????????????+?"</Modulus>");
????????????buff.append("<Exponent>"
????????????????????+?b64encode(removeMSZero(pvkKey.getPublicExponent()
????????????????????????????.toByteArray()))?+?"</Exponent>");
????????????buff.append("</RSAKeyValue>");
????????????return?buff.toString().replaceAll("[?\t\n\r]",?"");
????????}?catch?(Exception?e)?{
????????????System.err.println(e);
????????????return?null;
????????}
????}

????//?---------?remove?leading?(Most?Significant)?zero?byte?if?present
????//?----------------
????private?byte[]?removeMSZero(byte[]?data)?{
????????byte[]?data1;
????????int?len?=?data.length;
????????if?(data[0]?==?0)?{
????????????data1?=?new?byte[data.length?-?1];
????????????System.arraycopy(data,?1,?data1,?0,?len?-?1);
????????}?else
????????????data1?=?data;

????????return?data1;
????}

????private?String?b64encode(byte[]?data)?{

????????String?b64str?=?new?String(Base64Encoder.encode(data));
????????return?b64str;
????}

????private?byte[]?b64decode(String?data)?{
????????byte[]?decodeData?=?Base64Decoder.decode(data);
????????return?decodeData;
????}

????public?static?void?main(String?args[])?{
????????ssosign?sso?=?new?ssosign();
//?????????sso.GenerateKeys(
//?????????1024,
//?????????"d:/private.key",
//?????????"d:/public.key",
//?????????"d:/netpublic.key",
//?????????"d:/netprivate.key");

?????????String?signedData?=?sso
?????????.Sign("zhangxn",
?????????"2010-12-10?11:21:18",
?????????"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");
?????????System.out.println(signedData);

//????????String?signedData?=?"D+vkrMIe9cJyr3kELI5jNes/bJe7MLExyJDMqJyBlVgFtmPNQ723IsBtWmqO93yoBoKHaxeTI1kwaJzESe3X5vqS6TfFBTl+IeX5aJ/cc1+Hxo5Rr2QZwzUywgS/e3gRC+Ik+Fx0M0gBaQTGNdIDNaIvl776+0SNVaD0L3Sar9k=";
//????????boolean?res?=?sso
//????????????????.Verify(signedData,
//????????????????????????"zhangxn",
//????????????????????????"2010-12-10?11:21:18",
//????????????????????????"MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDWWmcu+6YPz8150nuzhZLxQ7045FtdVOAleZ9rvZsjgDUvWXo2n3UERND7IHwWrqIZbDk5Hw4HZRtEFyilvZ616kOpZ3uSYK1tVPfqRNb4Tx1Z1pWNsjYEJcQZpe7M890Y6WnnY5prBhHnPIbQyIK8niMTtEMlrHgKXbhmo9SzhQIDAQAB");
//????????System.out.println(res);

????}

轉載于:https://www.cnblogs.com/amylis_chen/p/8611838.html

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