.NET與JAVA RSA密鑰格式轉換

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一、該篇內容用於記錄.net和Java之間，RSA公密鑰的轉換

using Org.BouncyCastle.Asn1.Pkcs;using Org.BouncyCastle.Asn1.X509;using Org.BouncyCastle.Crypto.Parameters;using Org.BouncyCastle.Math;using Org.BouncyCastle.Pkcs;using Org.BouncyCastle.Security;using Org.BouncyCastle.X509;using System;using System.Xml;namespace Sysock.Framework{    /// <summary>    /// RSA密鑰格式轉換    /// </summary>    public class RsaKeyConvert    {        /// <summary>        /// RSA私密金鑰格式轉換，java->.net        /// </summary>        /// <param name="privateKey">java產生的RSA私密金鑰</param>        /// <returns></returns>        public static string RSAPrivateKeyJava2DotNet(string privateKey)        {            RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKey));            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>",                Convert.ToBase64String(privateKeyParam.Modulus.ToByteArrayUnsigned()),                Convert.ToBase64String(privateKeyParam.PublicExponent.ToByteArrayUnsigned()),                Convert.ToBase64String(privateKeyParam.P.ToByteArrayUnsigned()),                Convert.ToBase64String(privateKeyParam.Q.ToByteArrayUnsigned()),                Convert.ToBase64String(privateKeyParam.DP.ToByteArrayUnsigned()),                Convert.ToBase64String(privateKeyParam.DQ.ToByteArrayUnsigned()),                Convert.ToBase64String(privateKeyParam.QInv.ToByteArrayUnsigned()),                Convert.ToBase64String(privateKeyParam.Exponent.ToByteArrayUnsigned()));        }        /// <summary>        /// RSA私密金鑰格式轉換，.net->java        /// </summary>        /// <param name="privateKey">.net產生的私密金鑰</param>        /// <returns></returns>        public static string RSAPrivateKeyDotNet2Java(string privateKey)        {            XmlDocument doc = new XmlDocument();            doc.LoadXml(privateKey);            BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));            BigInteger exp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));            BigInteger d = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("D")[0].InnerText));            BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("P")[0].InnerText));            BigInteger q = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Q")[0].InnerText));            BigInteger dp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DP")[0].InnerText));            BigInteger dq = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DQ")[0].InnerText));            BigInteger qinv = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("InverseQ")[0].InnerText));            RsaPrivateCrtKeyParameters privateKeyParam = new RsaPrivateCrtKeyParameters(m, exp, d, p, q, dp, dq, qinv);            PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKeyParam);            byte[] serializedPrivateBytes = privateKeyInfo.ToAsn1Object().GetEncoded();            return Convert.ToBase64String(serializedPrivateBytes);        }        /// <summary>        /// RSA公開金鑰格式轉換，java->.net        /// </summary>        /// <param name="publicKey">java產生的公開金鑰</param>        /// <returns></returns>        public static string RSAPublicKeyJava2DotNet(string publicKey)        {            RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKey));            return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent></RSAKeyValue>",                Convert.ToBase64String(publicKeyParam.Modulus.ToByteArrayUnsigned()),                Convert.ToBase64String(publicKeyParam.Exponent.ToByteArrayUnsigned()));        }        /// <summary>        /// RSA公開金鑰格式轉換，.net->java        /// </summary>        /// <param name="publicKey">.net產生的公開金鑰</param>        /// <returns></returns>        public static string RSAPublicKeyDotNet2Java(string publicKey)        {            XmlDocument doc = new XmlDocument();            doc.LoadXml(publicKey);            BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));            BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));            RsaKeyParameters pub = new RsaKeyParameters(false, m, p);            SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pub);            byte[] serializedPublicBytes = publicKeyInfo.ToAsn1Object().GetDerEncoded();            return Convert.ToBase64String(serializedPublicBytes);        }    }}

 

.NET與JAVA RSA密鑰格式轉換