mirror of
https://gitee.com/fudiwei/DotNetCore.SKIT.FlurlHttpClient.Wechat.git
synced 2025-09-19 01:58:14 +08:00
272 lines
13 KiB
C#
272 lines
13 KiB
C#
using System;
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using System.IO;
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using System.Text;
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using System.Text.RegularExpressions;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Crypto.Engines;
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using Org.BouncyCastle.Crypto.Parameters;
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using Org.BouncyCastle.OpenSsl;
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using Org.BouncyCastle.Security;
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using Org.BouncyCastle.X509;
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namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Utilities
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{
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/// <summary>
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/// RSA 算法工具类。
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/// </summary>
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public static class RSAUtility
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{
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// REF: https://github.com/bcgit/bc-csharp/blob/master/crypto/src/security/CipherUtilities.cs
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private const string RSA_CIPHER_ALG = "RSA/ECB/PKCS1";
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// REF: https://github.com/bcgit/bc-csharp/blob/master/crypto/src/security/SignerUtilities.cs
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private const string RSA_SIGNER_ALG = "SHA-256withRSA";
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/// <summary>
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/// 使用私钥基于 SHA-256 算法生成签名。
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/// </summary>
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/// <param name="privateKeyBytes">PKCS#8 私钥字节数组。</param>
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/// <param name="plainBytes">待签名的数据字节数组。</param>
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/// <returns>签名字节数组。</returns>
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public static byte[] SignWithSHA256(byte[] privateKeyBytes, byte[] plainBytes)
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{
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if (privateKeyBytes == null) throw new ArgumentNullException(nameof(privateKeyBytes));
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if (plainBytes == null) throw new ArgumentNullException(nameof(plainBytes));
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RsaKeyParameters rsaKeyParams = (RsaKeyParameters)PrivateKeyFactory.CreateKey(privateKeyBytes);
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return SignWithSHA256(rsaKeyParams, plainBytes);
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}
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/// <summary>
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/// 使用私钥基于 SHA-256 算法生成签名。
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/// </summary>
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/// <param name="privateKey">PKCS#8 私钥（pem 格式）。</param>
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/// <param name="plainText">待签名的文本数据。</param>
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/// <returns>经 Base64 编码的签名。</returns>
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public static string SignWithSHA256(string privateKey, string plainText)
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{
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if (privateKey == null) throw new ArgumentNullException(nameof(privateKey));
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if (plainText == null) throw new ArgumentNullException(nameof(plainText));
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byte[] privateKeyBytes = ConvertPkcs8PrivateKeyToByteArray(privateKey);
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byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
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byte[] signBytes = SignWithSHA256(privateKeyBytes, plainBytes);
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return Convert.ToBase64String(signBytes);
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}
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/// <summary>
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/// 使用公钥基于 SHA-256 算法验证签名。
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/// </summary>
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/// <param name="publicKeyBytes">PKCS#8 公钥字节数据。</param>
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/// <param name="plainBytes">待验证的数据字节数据。</param>
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/// <param name="signBytes">待验证的签名字节数据。</param>
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/// <returns>验证结果。</returns>
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public static bool VerifyWithSHA256(byte[] publicKeyBytes, byte[] plainBytes, byte[] signBytes)
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{
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if (publicKeyBytes == null) throw new ArgumentNullException(nameof(publicKeyBytes));
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if (plainBytes == null) throw new ArgumentNullException(nameof(plainBytes));
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if (signBytes == null) throw new ArgumentNullException(nameof(signBytes));
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RsaKeyParameters rsaKeyParams = (RsaKeyParameters)PublicKeyFactory.CreateKey(publicKeyBytes);
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return VerifyWithSHA256(rsaKeyParams, plainBytes, signBytes);
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}
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/// <summary>
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/// 使用公钥基于 SHA-256 算法验证签名。
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/// </summary>
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/// <param name="publicKey">PKCS#8 公钥（pem 格式）。</param>
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/// <param name="plainText">待验证的文本数据。</param>
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/// <param name="signature">经 Base64 编码的待验证的签名。</param>
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/// <returns>验证结果。</returns>
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public static bool VerifyWithSHA256(string publicKey, string plainText, string signature)
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{
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if (publicKey == null) throw new ArgumentNullException(nameof(publicKey));
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if (plainText == null) throw new ArgumentNullException(nameof(plainText));
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if (signature == null) throw new ArgumentNullException(nameof(signature));
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byte[] publicKeyBytes = ConvertPkcs8PublicKeyToByteArray(publicKey);
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byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
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byte[] signBytes = Convert.FromBase64String(signature);
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return VerifyWithSHA256(publicKeyBytes, plainBytes, signBytes);
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}
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/// <summary>
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/// 使用证书基于 SHA-256 算法验证签名。
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/// </summary>
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/// <param name="certificate">证书（cer 格式）。</param>
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/// <param name="plainText">待验证的文本数据。</param>
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/// <param name="signature">经 Base64 编码的待验证的签名。</param>
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/// <returns>验证结果。</returns>
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public static bool VerifyWithSHA256ByCertificate(string certificate, string plainText, string signature)
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{
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if (certificate == null) throw new ArgumentNullException(nameof(certificate));
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if (plainText == null) throw new ArgumentNullException(nameof(plainText));
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if (signature == null) throw new ArgumentNullException(nameof(signature));
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RsaKeyParameters rsaKeyParams = ConvertCertificateToPublicKeyParams(certificate);
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byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
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byte[] signBytes = Convert.FromBase64String(signature);
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return VerifyWithSHA256(rsaKeyParams, plainBytes, signBytes);
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}
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/// <summary>
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/// 使用私钥基于 ECB 模式解密数据。
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/// </summary>
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/// <param name="privateKeyBytes">PKCS#8 私钥字节数据。</param>
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/// <param name="cipherBytes">待解密的数据字节数据。</param>
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/// <returns>解密后的数据字节数组。</returns>
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public static byte[] DecryptWithECB(byte[] privateKeyBytes, byte[] cipherBytes)
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{
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if (privateKeyBytes == null) throw new ArgumentNullException(nameof(privateKeyBytes));
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if (cipherBytes == null) throw new ArgumentNullException(nameof(cipherBytes));
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RsaKeyParameters rsaKeyParams = (RsaKeyParameters)PrivateKeyFactory.CreateKey(privateKeyBytes);
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return DecryptWithECB(rsaKeyParams, cipherBytes);
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}
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/// <summary>
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/// 使用私钥基于 ECB 模式解密数据。
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/// </summary>
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/// <param name="privateKey">PKCS#8 私钥（pem 格式）。</param>
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/// <param name="cipherText">经 Base64 编码的待解密数据。</param>
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/// <returns>解密后的文本数据。</returns>
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public static string DecryptWithECB(string privateKey, string cipherText)
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{
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if (privateKey == null) throw new ArgumentNullException(nameof(privateKey));
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if (cipherText == null) throw new ArgumentNullException(nameof(cipherText));
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byte[] privateKeyBytes = ConvertPkcs8PrivateKeyToByteArray(privateKey);
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byte[] cipherBytes = Convert.FromBase64String(cipherText);
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byte[] plainBytes = DecryptWithECB(privateKeyBytes, cipherBytes);
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return Encoding.UTF8.GetString(plainBytes);
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}
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/// <summary>
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/// 使用公钥基于 ECB 模式加密数据。
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/// </summary>
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/// <param name="publicKeyBytes">PKCS#8 公钥字节数据。</param>
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/// <param name="plainBytes">待加密的数据字节数据。</param>
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/// <returns>加密后的数据字节数组。</returns>
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public static byte[] EncryptWithECB(byte[] publicKeyBytes, byte[] plainBytes)
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{
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if (publicKeyBytes == null) throw new ArgumentNullException(nameof(publicKeyBytes));
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if (plainBytes == null) throw new ArgumentNullException(nameof(plainBytes));
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RsaKeyParameters rsaKeyParams = (RsaKeyParameters)PublicKeyFactory.CreateKey(publicKeyBytes);
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return EncryptWithECB(rsaKeyParams, plainBytes);
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}
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/// <summary>
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/// 使用公钥基于 ECB 模式加密数据。
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/// </summary>
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/// <param name="publicKey">PKCS#8 公钥（pem 格式）。</param>
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/// <param name="plainText">待加密的文本数据。</param>
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/// <returns>经 Base64 编码的加密数据。</returns>
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public static string EncryptWithECB(string publicKey, string plainText)
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{
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if (publicKey == null) throw new ArgumentNullException(nameof(publicKey));
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if (plainText == null) throw new ArgumentNullException(nameof(plainText));
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byte[] publicKeyBytes = ConvertPkcs8PublicKeyToByteArray(publicKey);
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byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
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byte[] cipherBytes = EncryptWithECB(publicKeyBytes, plainBytes);
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return Convert.ToBase64String(cipherBytes);
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}
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/// <summary>
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/// 使用证书基于 ECB 模式加密数据。
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/// </summary>
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/// <param name="certificate">证书（cer 格式）。</param>
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/// <param name="plainText">待加密的文本数据。</param>
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/// <returns>经 Base64 编码的加密数据。</returns>
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public static string EncryptWithECBByCertificate(string certificate, string plainText)
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{
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if (certificate == null) throw new ArgumentNullException(nameof(certificate));
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if (plainText == null) throw new ArgumentNullException(nameof(plainText));
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RsaKeyParameters rsaKeyParams = ConvertCertificateToPublicKeyParams(certificate);
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byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
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byte[] cipherBytes = EncryptWithECB(rsaKeyParams, plainBytes);
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return Convert.ToBase64String(cipherBytes);
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}
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/// <summary>
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/// <para>从 CER 证书中提取 PKCS#8 公钥。</para>
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/// <para>
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/// 即从 -----BEGIN CERTIFICATE----- ... -----END CERTIFICATE-----
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/// 转为 -----BEGIN PUBLIC KEY----- ..... -----END PUBLIC KEY-----
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/// </para>
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/// </summary>
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/// <param name="certificate">证书（cer 格式）。</param>
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/// <returns>PKCS#8 公钥（pem 格式）。</returns>
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public static string ExportPublicKey(string certificate)
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{
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using (TextWriter swriter = new StringWriter())
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{
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RsaKeyParameters rsaKeyParams = ConvertCertificateToPublicKeyParams(certificate);
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PemWriter pemWriter = new PemWriter(swriter);
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pemWriter.WriteObject(rsaKeyParams);
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pemWriter.Writer.Flush();
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return swriter.ToString()!;
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}
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}
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private static byte[] ConvertPkcs8PrivateKeyToByteArray(string privateKey)
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{
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privateKey = privateKey
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.Replace("-----BEGIN PRIVATE KEY-----", "")
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.Replace("-----END PRIVATE KEY-----", "");
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privateKey = Regex.Replace(privateKey, "\\s+", "");
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return Convert.FromBase64String(privateKey);
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}
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private static byte[] ConvertPkcs8PublicKeyToByteArray(string publicKey)
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{
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publicKey = publicKey
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.Replace("-----BEGIN PUBLIC KEY-----", "")
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.Replace("-----END PUBLIC KEY-----", "");
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publicKey = Regex.Replace(publicKey, "\\s+", "");
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return Convert.FromBase64String(publicKey);
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}
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private static RsaKeyParameters ConvertCertificateToPublicKeyParams(string certificate)
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{
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using (TextReader sreader = new StringReader(certificate))
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{
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PemReader pemReader = new PemReader(sreader);
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X509Certificate cert = (X509Certificate)pemReader.ReadObject();
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return (RsaKeyParameters)cert.GetPublicKey();
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}
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}
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private static byte[] SignWithSHA256(RsaKeyParameters rsaKeyParams, byte[] plainBytes)
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{
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ISigner signer = SignerUtilities.GetSigner(RSA_SIGNER_ALG);
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signer.Init(true, rsaKeyParams);
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signer.BlockUpdate(plainBytes, 0, plainBytes.Length);
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return signer.GenerateSignature();
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}
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private static bool VerifyWithSHA256(RsaKeyParameters rsaKeyParams, byte[] plainBytes, byte[] signBytes)
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{
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ISigner signer = SignerUtilities.GetSigner(RSA_SIGNER_ALG);
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signer.Init(false, rsaKeyParams);
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signer.BlockUpdate(plainBytes, 0, plainBytes.Length);
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return signer.VerifySignature(signBytes);
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}
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private static byte[] EncryptWithECB(RsaKeyParameters rsaKeyParams, byte[] plainBytes)
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{
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IBufferedCipher cipher = CipherUtilities.GetCipher(RSA_CIPHER_ALG);
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cipher.Init(true, rsaKeyParams);
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return cipher.DoFinal(plainBytes);
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}
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private static byte[] DecryptWithECB(RsaKeyParameters rsaKeyParams, byte[] cipherBytes)
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{
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IBufferedCipher cipher = CipherUtilities.GetCipher(RSA_CIPHER_ALG);
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cipher.Init(false, rsaKeyParams);
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return cipher.DoFinal(cipherBytes);
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}
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}
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}
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