C# System.Security.Cryptography.CryptographicException：“未知错误（0xc100000d）”

Question

我尝试使用 .NET v8 在 C# 中实现 RSA 加密功能。加密测试顺利，但解密测试时出现意外异常。

错误详情：

System.Security.Cryptography.CryptographicException
  HResult=0xC100000D
  Message=Unknown error (0xc100000d)
  Source=System.Security.Cryptography
  StackTrace:
   at Interop.BCrypt.BCryptEncryptRsa(SafeBCryptKeyHandle key, ReadOnlySpan`1 source, Span`1 destination, Void* pPaddingInfo, BCryptEncryptFlags dwFlags)
   at System.Security.Cryptography.RSABCrypt.TryEncrypt(ReadOnlySpan`1 data, Span`1 destination, RSAEncryptionPadding padding, Int32& bytesWritten)
   at System.Security.Cryptography.RSA.Encrypt(ReadOnlySpan`1 data, Span`1 destination, RSAEncryptionPadding padding)
   at System.Security.Cryptography.RSABCrypt.Encrypt(Byte[] data, RSAEncryptionPadding padding)
   at FileCryptography.FileEncryptionUtility.Encrypt(Byte[] data, String pemKey) in Class1.cs:line 51
   at FileCryptography.FileEncryptionUtility.EncryptFile(String filePath, String pemKey) in Class1.cs:line 25
   at FileCryptography.FileEncryptionUtility.File_encryption(Boolean Is_encrypt, String File_path, String PEMkey) in Class1.cs:line 14
   at Cry.Form.File_crypt(Boolean Is_encrypt, String File_path) in Form1.cs:line 114
   at Cry.Form.Form_Load(Object sender, EventArgs e) in Form1.cs:line 203
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at System.Windows.Forms.Control.CreateControl(Boolean ignoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)

这是我的代码：

Class1.cs

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace FileCryptography
{
    public class FileEncryptionUtility
    {
        public static void File_encryption(bool Is_encrypt, string File_path, string PEMkey)
        {
            if (Is_encrypt)
            {
                EncryptFile(File_path, PEMkey);
            }
            else
            {
                DecryptFile(File_path, PEMkey);
            }
        }

        private static void EncryptFile(string filePath, string pemKey)
        {
            byte[] data = File.ReadAllBytes(filePath);
            byte[] encryptedData = Encrypt(data, pemKey);
            File.Delete(filePath);
            string p1 = Path.GetDirectoryName(filePath);
            string p2 = Path.GetFileNameWithoutExtension(filePath);
            string p3 = Path.GetExtension(filePath);
            string p4 = ".rwnenc";
            string p = $"{p1}{p2}{p3}{p4}";
            File.WriteAllBytes(p, encryptedData);
            File.Delete(filePath);
        }
        private static void DecryptFile(string filePath, string pemKey)
        {
            byte[] encryptedData = File.ReadAllBytes(filePath);
            byte[] decryptedData = Decrypt(encryptedData, pemKey);
            string directory = Path.GetDirectoryName(filePath);
            string filenameWithoutExtension = Path.GetFileNameWithoutExtension(filePath);
            filenameWithoutExtension = filenameWithoutExtension.Replace(".rwnenc", "");
            string newFilePath = Path.Combine(directory, filenameWithoutExtension);
            File.WriteAllBytes(newFilePath, decryptedData);
        }

        private static byte[] Encrypt(byte[] data, string pemKey)
        {
            using (RSA rsa = RSA.Create())
            {
                rsa.ImportFromPem(pemKey.ToCharArray());
                return rsa.Encrypt(data, RSAEncryptionPadding.OaepSHA512);
            }
        }

        private static byte[] Decrypt(byte[] data, string pemKey)
        {
            using (RSA rsa = RSA.Create())
            {
                rsa.ImportFromPem(pemKey.ToCharArray());
                return rsa.Decrypt(data, RSAEncryptionPadding.OaepSHA512);
            }
        }
    }
}

我希望程序能够顺利运行，不会遇到指示

0xC100000D

的错误

Unknown Error

我需要紧急答复。

Answer 1

如果您使用公钥进行加密，则必须使用相应的私钥进行解密。

确保密钥解析正确。如果 PEM 密钥包含换行符或格式问题，可能会导致导入失败。