cyf
40 lines
1.5 KiB
C#
40 lines
1.5 KiB
C#
using Org.BouncyCastle.Crypto.Parameters;
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using Org.BouncyCastle.Security;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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namespace Lskj.QueryEssentialInfo
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{
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public static class RsaEntryUtil
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{
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public static byte[] Encrypt(string plainText, string publicKeyXml)
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{
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byte[] dataToEncrypt = Encoding.UTF8.GetBytes(plainText);
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using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
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{
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rsa.FromXmlString(publicKeyXml);
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// 默认使用PKCS#1 v1.5填充，4.0版本不支持OAEP-SHA256，只能用OAEP-SHA1，且需要指定true
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return rsa.Encrypt(dataToEncrypt, false);
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}
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}
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public static string ToXmlPublicKey(string pubilcKey)
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{
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RsaKeyParameters rsaKeyParameters = PublicKeyFactory.CreateKey(Convert.FromBase64String(pubilcKey)) as RsaKeyParameters;
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using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
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{
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RSAParameters rsaParams = new RSAParameters
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{
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Modulus = rsaKeyParameters.Modulus.ToByteArrayUnsigned(),
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Exponent = rsaKeyParameters.Exponent.ToByteArrayUnsigned()
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};
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rsa.ImportParameters(rsaParams);
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return rsa.ToXmlString(false);
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}
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}
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}
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}
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