C# RSA和Java RSA互通

今天调查了C# RSA和Java RSA，网上很多人说，C#加密或者java加密 ，Java不能解密或者C#不能解密

但是我尝试了一下，发现是可以的，下面就是我尝试的代码，如果您有什么问题，我想看看，他们为什么不能互通？

1. package rsa;
2. import java.math.BigInteger;
3. import java.security.KeyFactory;
4. import java.security.PrivateKey;
5. import java.security.PublicKey;
6. import java.security.spec.RSAPrivateKeySpec;
7. import java.security.spec.RSAPublicKeySpec;
8. import javax.crypto.Cipher;
9. import com.sun.org.apache.xml.internal.security.exceptions.Base64DecodingException;
10. import com.sun.org.apache.xml.internal.security.utils.Base64;
11. /**
12. * @author cnchenhl
13. * Jul 8, 2011
14. */
15. public class RSAMain {
16. private static String module = "5m9m14XH3oqLJ8bNGw9e4rGpXpcktv9MSkHSVFVMjHbfv+SJ5v0ubqQxa5YjLN4vc49z7SVju8s0X4gZ6AzZTn06jzWOgyPRV54Q4I0DCYadWW4Ze3e+BOtwgVU1Og3qHKn8vygoj40J6U85Z/PTJu3hN1m75Zr195ju7g9v4Hk=";
17. private static String exponentString = "AQAB";
18. private static String delement = "vmaYHEbPAgOJvaEXQl+t8DQKFT1fudEysTy31LTyXjGu6XiltXXHUuZaa2IPyHgBz0Nd7znwsW/S44iql0Fen1kzKioEL3svANui63O3o5xdDeExVM6zOf1wUUh/oldovPweChyoAdMtUzgvCbJk1sYDJf++Nr0FeNW1RB1XG30=";
19. private static String encryptString = "Vx/dGjS1YWKRubsoDgiShiwLgqyNE2z/eM65U7HZx+RogwaiZimNBxjuOS6acEhKZx66cMYEAd1fc6oewbEvDIfP44GaN9dCjKE/BkkQlwEg6aTO5q+yqy+nEGe1kvLY9EyXS/Kv1LDh3e/2xAk5FNj8Zp6oU2kq4ewL8kK/ai4=";
20. /**
21. * @param args
22. */
23. public static void main(String[] args) {
24. byte[] en = encrypt();
25. System.out.println(Base64.encode(en));
26. byte[] enTest = null;
27. try {
28. enTest = Base64.decode(encryptString);
29. } catch (Base64DecodingException e) {
30. e.printStackTrace();
31. }
32. System.out.println(enTest.length);
33. System.out.println(en.length);
34. System.out.println(new String(Dencrypt(en)));
35. System.out.println(new String(Dencrypt(enTest)));
36. }
37. public static byte[] encrypt() {
38. try {
39. byte[] modulusBytes = Base64.decode(module);
40. byte[] exponentBytes = Base64.decode(exponentString);
41. BigInteger modulus = new BigInteger(1, modulusBytes);
42. BigInteger exponent = new BigInteger(1, exponentBytes);
43. RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(modulus, exponent);
44. KeyFactory fact = KeyFactory.getInstance("RSA");
45. PublicKey pubKey = fact.generatePublic(rsaPubKey);
46. Cipher cipher = Cipher.getInstance("RSA");
47. cipher.init(Cipher.ENCRYPT_MODE, pubKey);
48. byte[] cipherData = cipher.doFinal(new String("chenhailong").getBytes());
49. return cipherData;
50. } catch (Exception e) {
51. e.printStackTrace();
52. }
53. return null;
54. }
55. public static byte[] Dencrypt(byte[] encrypted) {
56. try {
57. byte[] expBytes = Base64.decode(delement);
58. byte[] modBytes = Base64.decode(module);
59. BigInteger modules = new BigInteger(1, modBytes);
60. BigInteger exponent = new BigInteger(1, expBytes);
61. KeyFactory factory = KeyFactory.getInstance("RSA");
62. Cipher cipher = Cipher.getInstance("RSA");
63. RSAPrivateKeySpec privSpec = new RSAPrivateKeySpec(modules, exponent);
64. PrivateKey privKey = factory.generatePrivate(privSpec);
65. cipher.init(Cipher.DECRYPT_MODE, privKey);
66. byte[] decrypted = cipher.doFinal(encrypted);
67. return decrypted;
68. } catch (Exception e) {
69. e.printStackTrace();
70. }
71. return null;
72. }
73. }

1. using System;
2. using System.Collections.Generic;
3. using System.Linq;
4. using System.Text;
5. using System.Security.Cryptography;
6. namespace RSA
7. {
8. class Program
9. {
10. static void Main(string[] args)
11. {
12. string de  = "iBILuPJFgPMxgpbgN3F2JjD6XjcqRSApjVVbvBBEBDV21Pjj7lTrfhEjSVnJX/MVoZrmX0lxsvoXTMvvVwVF7K7W5hs7Qo+aMN96yWke7wiLEM9M4pPz60A/KSckskiona67tXcqOLXb8N18TKaNCKHv0Ce+GyEKK5+MT7e1vao=";
13. //string encrypt = RSAEncrypt("", "chenhailong");
14. byte[] encrypt = RSAEncrypt("chenhailong");
15. //string name = RSADecrypt(encrypt);
16. string name = RSADecrypt(Convert.FromBase64String(de));
17. Console.WriteLine(encrypt.Length);
18. Console.WriteLine(Convert.ToBase64String(encrypt));
19. Console.WriteLine(name);
20. Console.ReadKey();
21. }
22. /// <summary>
23. /// RSA encrypt
24. /// </summary>
25. /// <param name="publickey"></param>
26. /// <param name="content"></param>
27. /// <returns></returns>
28. public static byte[] RSAEncrypt(string content)
29. {
30. string publickey = @"<RSAKeyValue><Modulus>5m9m14XH3oqLJ8bNGw9e4rGpXpcktv9MSkHSVFVMjHbfv+SJ5v0ubqQxa5YjLN4vc49z7SVju8s0X4gZ6AzZTn06jzWOgyPRV54Q4I0DCYadWW4Ze3e+BOtwgVU1Og3qHKn8vygoj40J6U85Z/PTJu3hN1m75Zr195ju7g9v4Hk=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
31. RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
32. byte[] cipherbytes;
33. rsa.FromXmlString(publickey);
34. cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);
35. //return Convert.ToBase64String(cipherbytes);
36. return cipherbytes;
37. }
38. /// <summary>
39. /// RSA decrypt
40. /// </summary>
41. /// <param name="privatekey"></param>
42. /// <param name="content"></param>
43. /// <returns></returns>
44. public static string RSADecrypt(byte[] content)
45. {
46. string privatekey = @"<RSAKeyValue><Modulus>5m9m14XH3oqLJ8bNGw9e4rGpXpcktv9MSkHSVFVMjHbfv+SJ5v0ubqQxa5YjLN4vc49z7SVju8s0X4gZ6AzZTn06jzWOgyPRV54Q4I0DCYadWW4Ze3e+BOtwgVU1Og3qHKn8vygoj40J6U85Z/PTJu3hN1m75Zr195ju7g9v4Hk=</Modulus><Exponent>AQAB</Exponent><P>/hf2dnK7rNfl3lbqghWcpFdu778hUpIEBixCDL5WiBtpkZdpSw90aERmHJYaW2RGvGRi6zSftLh00KHsPcNUMw==</P><Q>6Cn/jOLrPapDTEp1Fkq+uz++1Do0eeX7HYqi9rY29CqShzCeI7LEYOoSwYuAJ3xA/DuCdQENPSoJ9KFbO4Wsow==</Q><DP>ga1rHIJro8e/yhxjrKYo/nqc5ICQGhrpMNlPkD9n3CjZVPOISkWF7FzUHEzDANeJfkZhcZa21z24aG3rKo5Qnw==</DP><DQ>MNGsCB8rYlMsRZ2ek2pyQwO7h/sZT8y5ilO9wu08Dwnot/7UMiOEQfDWstY3w5XQQHnvC9WFyCfP4h4QBissyw==</DQ><InverseQ>EG02S7SADhH1EVT9DD0Z62Y0uY7gIYvxX/uq+IzKSCwB8M2G7Qv9xgZQaQlLpCaeKbux3Y59hHM+KpamGL19Kg==</InverseQ><D>vmaYHEbPAgOJvaEXQl+t8DQKFT1fudEysTy31LTyXjGu6XiltXXHUuZaa2IPyHgBz0Nd7znwsW/S44iql0Fen1kzKioEL3svANui63O3o5xdDeExVM6zOf1wUUh/oldovPweChyoAdMtUzgvCbJk1sYDJf++Nr0FeNW1RB1XG30=</D></RSAKeyValue>";
47. RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
48. byte[] cipherbytes;
49. rsa.FromXmlString(privatekey);
50. cipherbytes = rsa.Decrypt(content, false);
51. return Encoding.UTF8.GetString(cipherbytes);
52. }
53. }
54. }

有什么问题 请给我留言

下面是Key的互通代码

1. private byte[] removeMSZero(byte[] data) {
2. byte[] data1;
3. int len = data.length;
4. if (data[0] == 0) {
5. data1 = new byte[data.length - 1];
6. System.arraycopy(data, 1, data1, 0, len - 1);
7. } else
8. data1 = data;
9. return data1;
10. }