C#下解析、生成JAVA的RSA密钥、公钥

C#下解析、生成JAVA的RSA密钥、公钥

娃都会打酱油了 2016-07-06 14:26:09 9267 收藏 1

分类专栏： C# Java 加密解密

 

需要用到的dll在nuget上的地址是：https://www.nuget.org/packages/BouncyCastle/，相关转换代码如下：

1. using Org.BouncyCastle.Asn1.Pkcs;
2. using Org.BouncyCastle.Asn1.X509;
3. using Org.BouncyCastle.Crypto.Parameters;
4. using Org.BouncyCastle.Math;
5. using Org.BouncyCastle.Pkcs;
6. using Org.BouncyCastle.Security;
7. using Org.BouncyCastle.X509;
8. using System;
9. using System.Xml;
10. /// <summary>
11. /// RSA密钥格式转换
12. /// </summary>
13. public static class RSAConverter
14. {
15. /// <summary>
16. /// RSA私钥格式转换，java->.net
17. /// </summary>
18. /// <param name="privateKey">java生成的RSA私钥</param>
19. /// <returns></returns>
20. public static string RSAPrivateKeyJava2DotNet(this string privateKey)
21. {
22. RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKey));
23. return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent><P>{2}</P><Q>{3}</Q><DP>{4}</DP><DQ>{5}</DQ><InverseQ>{6}</InverseQ><D>{7}</D></RSAKeyValue>",
24. Convert.ToBase64String(privateKeyParam.Modulus.ToByteArrayUnsigned()),
25. Convert.ToBase64String(privateKeyParam.PublicExponent.ToByteArrayUnsigned()),
26. Convert.ToBase64String(privateKeyParam.P.ToByteArrayUnsigned()),
27. Convert.ToBase64String(privateKeyParam.Q.ToByteArrayUnsigned()),
28. Convert.ToBase64String(privateKeyParam.DP.ToByteArrayUnsigned()),
29. Convert.ToBase64String(privateKeyParam.DQ.ToByteArrayUnsigned()),
30. Convert.ToBase64String(privateKeyParam.QInv.ToByteArrayUnsigned()),
31. Convert.ToBase64String(privateKeyParam.Exponent.ToByteArrayUnsigned()));
32. }
33. /// <summary>
34. /// RSA私钥格式转换，.net->java
35. /// </summary>
36. /// <param name="privateKey">.net生成的私钥</param>
37. /// <returns></returns>
38. public static string RSAPrivateKeyDotNet2Java(this string privateKey)
39. {
40. XmlDocument doc = new XmlDocument();
41. doc.LoadXml(privateKey);
42. BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
43. BigInteger exp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
44. BigInteger d = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("D")[0].InnerText));
45. BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("P")[0].InnerText));
46. BigInteger q = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Q")[0].InnerText));
47. BigInteger dp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DP")[0].InnerText));
48. BigInteger dq = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DQ")[0].InnerText));
49. BigInteger qinv = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("InverseQ")[0].InnerText));
50. RsaPrivateCrtKeyParameters privateKeyParam = new RsaPrivateCrtKeyParameters(m, exp, d, p, q, dp, dq, qinv);
51. PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKeyParam);
52. byte[] serializedPrivateBytes = privateKeyInfo.ToAsn1Object().GetEncoded();
53. return Convert.ToBase64String(serializedPrivateBytes);
54. }
55. /// <summary>
56. /// RSA公钥格式转换，java->.net
57. /// </summary>
58. /// <param name="publicKey">java生成的公钥</param>
59. /// <returns></returns>
60. public static string RSAPublicKeyJava2DotNet(this string publicKey)
61. {
62. RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKey));
63. return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent></RSAKeyValue>",
64. Convert.ToBase64String(publicKeyParam.Modulus.ToByteArrayUnsigned()),
65. Convert.ToBase64String(publicKeyParam.Exponent.ToByteArrayUnsigned()));
66. }
67. /// <summary>
68. /// RSA公钥格式转换，.net->java
69. /// </summary>
70. /// <param name="publicKey">.net生成的公钥</param>
71. /// <returns></returns>
72. public static string RSAPublicKeyDotNet2Java(this string publicKey)
73. {
74. XmlDocument doc = new XmlDocument(); doc.LoadXml(publicKey);
75. BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
76. BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
77. RsaKeyParameters pub = new RsaKeyParameters(false, m, p);
78. SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pub);
79. byte[] serializedPublicBytes = publicKeyInfo.ToAsn1Object().GetDerEncoded();
80. return Convert.ToBase64String(serializedPublicBytes);
81. }
82. }