本文实例讲述了C#创建自签名认证文件的方法。分享给大家供大家参考。具体如下：

using System;using System.Runtime.InteropServices;using System.Security.Cryptography.X509Certificates;using SecureString = System.Security.SecureString;using RuntimeHelpers = System.Runtime.CompilerServices.RuntimeHelpers;internal class Certificate{ public static byte[] CreateSelfSignCertificatePfx( string x500, DateTime startTime, DateTime endTime) { byte[] pfxData = CreateSelfSignCertificatePfx( x500, startTime, endTime, (SecureString)null); return pfxData; } public static byte[] CreateSelfSignCertificatePfx( string x500, DateTime startTime, DateTime endTime, string insecurePassword) { byte[] pfxData; SecureString password = null; try { if (!string.IsNullOrEmpty(insecurePassword)) { password = new SecureString(); foreach (char ch in insecurePassword) { password.AppendChar(ch); } password.MakeReadOnly(); } pfxData = CreateSelfSignCertificatePfx( x500, startTime, endTime, password); } finally { if (password != null) { password.Dispose(); } } return pfxData; } public static byte[] CreateSelfSignCertificatePfx( string x500, DateTime startTime, DateTime endTime, SecureString password) { byte[] pfxData; if (x500 == null) { x500 = ""; } SystemTime startSystemTime = ToSystemTime(startTime); SystemTime endSystemTime = ToSystemTime(endTime); string containerName = Guid.NewGuid().ToString(); GCHandle dataHandle = new GCHandle(); IntPtr providerContext = IntPtr.Zero; IntPtr cryptKey = IntPtr.Zero; IntPtr certContext = IntPtr.Zero; IntPtr certStore = IntPtr.Zero; IntPtr storeCertContext = IntPtr.Zero; IntPtr passwordPtr = IntPtr.Zero; RuntimeHelpers.PrepareConstrainedRegions(); try { Check(NativeMethods.CryptAcquireContextW( out providerContext, containerName, null, 1, // PROV_RSA_FULL 8)); // CRYPT_NEWKEYSET Check(NativeMethods.CryptGenKey( providerContext, 1, // AT_KEYEXCHANGE 1, // CRYPT_EXPORTABLE out cryptKey)); IntPtr errorStringPtr; int nameDataLength = 0; byte[] nameData; // errorStringPtr gets a pointer into the middle of the x500 string, // so x500 needs to be pinned until after we've copied the value // of errorStringPtr. dataHandle = GCHandle.Alloc(x500, GCHandleType.Pinned); if (!NativeMethods.CertStrToNameW( 0x00010001, // X509_ASN_ENCODING | PKCS_7_ASN_ENCODING dataHandle.AddrOfPinnedObject(), 3, // CERT_X500_NAME_STR = 3 IntPtr.Zero, null, ref nameDataLength, out errorStringPtr)) { string error = Marshal.PtrToStringUni(errorStringPtr); throw new ArgumentException(error); } nameData = new byte[nameDataLength]; if (!NativeMethods.CertStrToNameW( 0x00010001, // X509_ASN_ENCODING | PKCS_7_ASN_ENCODING dataHandle.AddrOfPinnedObject(), 3, // CERT_X500_NAME_STR = 3 IntPtr.Zero, nameData, ref nameDataLength, out errorStringPtr)) { string error = Marshal.PtrToStringUni(errorStringPtr); throw new ArgumentException(error); } dataHandle.Free(); dataHandle = GCHandle.Alloc(nameData, GCHandleType.Pinned); CryptoApiBlob nameBlob = new CryptoApiBlob( nameData.Length, dataHandle.AddrOfPinnedObject()); CryptKeyProviderInformation kpi = new CryptKeyProviderInformation(); kpi.ContainerName = containerName; kpi.ProviderType = 1; // PROV_RSA_FULL kpi.KeySpec = 1; // AT_KEYEXCHANGE certContext = NativeMethods.CertCreateSelfSignCertificate( providerContext, ref nameBlob, 0, ref kpi, IntPtr.Zero, // default = SHA1RSA ref startSystemTime, ref endSystemTime, IntPtr.Zero); Check(certContext != IntPtr.Zero); dataHandle.Free(); certStore = NativeMethods.CertOpenStore( "Memory", // sz_CERT_STORE_PROV_MEMORY 0, IntPtr.Zero, 0x2000, // CERT_STORE_CREATE_NEW_FLAG IntPtr.Zero); Check(certStore != IntPtr.Zero); Check(NativeMethods.CertAddCertificateContextToStore( certStore, certContext, 1, // CERT_STORE_ADD_NEW out storeCertContext)); NativeMethods.CertSetCertificateContextProperty( storeCertContext, 2, // CERT_KEY_PROV_INFO_PROP_ID 0, ref kpi); if (password != null) { passwordPtr = Marshal.SecureStringToCoTaskMemUnicode(password); } CryptoApiBlob pfxBlob = new CryptoApiBlob(); Check(NativeMethods.PFXExportCertStoreEx( certStore, ref pfxBlob, passwordPtr, IntPtr.Zero, 7)); // EXPORT_PRIVATE_KEYS | REPORT_NO_PRIVATE_KEY | REPORT_NOT_ABLE_TO_EXPORT_PRIVATE_KEY pfxData = new byte[pfxBlob.DataLength]; dataHandle = GCHandle.Alloc(pfxData, GCHandleType.Pinned); pfxBlob.Data = dataHandle.AddrOfPinnedObject(); Check(NativeMethods.PFXExportCertStoreEx( certStore, ref pfxBlob, passwordPtr, IntPtr.Zero, 7)); // EXPORT_PRIVATE_KEYS | REPORT_NO_PRIVATE_KEY | REPORT_NOT_ABLE_TO_EXPORT_PRIVATE_KEY dataHandle.Free(); } finally { if (passwordPtr != IntPtr.Zero) { Marshal.ZeroFreeCoTaskMemUnicode(passwordPtr); } if (dataHandle.IsAllocated) { dataHandle.Free(); } if (certContext != IntPtr.Zero) { NativeMethods.CertFreeCertificateContext(certContext); } if (storeCertContext != IntPtr.Zero) { NativeMethods.CertFreeCertificateContext(storeCertContext); } if (certStore != IntPtr.Zero) { NativeMethods.CertCloseStore(certStore, 0); } if (cryptKey != IntPtr.Zero) { NativeMethods.CryptDestroyKey(cryptKey); } if (providerContext != IntPtr.Zero) { NativeMethods.CryptReleaseContext(providerContext, 0); NativeMethods.CryptAcquireContextW( out providerContext, containerName, null, 1, // PROV_RSA_FULL 0x10); // CRYPT_DELETEKEYSET } } return pfxData; } private static SystemTime ToSystemTime(DateTime dateTime) { long fileTime = dateTime.ToFileTime(); SystemTime systemTime; Check(NativeMethods.FileTimeToSystemTime(ref fileTime, out systemTime)); return systemTime; } private static void Check(bool nativeCallSucceeded) { if (!nativeCallSucceeded) { int error = Marshal.GetHRForLastWin32Error(); Marshal.ThrowExceptionForHR(error); } } [StructLayout(LayoutKind.Sequential)] private struct SystemTime { public short Year; public short Month; public short DayOfWeek; public short Day; public short Hour; public short Minute; public short Second; public short Milliseconds; } [StructLayout(LayoutKind.Sequential)] private struct CryptoApiBlob { public int DataLength; public IntPtr Data; public CryptoApiBlob(int dataLength, IntPtr data) { this.DataLength = dataLength; this.Data = data; } } [StructLayout(LayoutKind.Sequential)] private struct CryptKeyProviderInformation { [MarshalAs(UnmanagedType.LPWStr)] public string ContainerName; [MarshalAs(UnmanagedType.LPWStr)] public string ProviderName; public int ProviderType; public int Flags; public int ProviderParameterCount; public IntPtr ProviderParameters; // PCRYPT_KEY_PROV_PARAM public int KeySpec; } private static class NativeMethods { [DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool FileTimeToSystemTime( [In] ref long fileTime, out SystemTime systemTime); [DllImport("AdvApi32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CryptAcquireContextW( out IntPtr providerContext, [MarshalAs(UnmanagedType.LPWStr)] string container, [MarshalAs(UnmanagedType.LPWStr)] string provider, int providerType, int flags); [DllImport("AdvApi32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CryptReleaseContext( IntPtr providerContext, int flags); [DllImport("AdvApi32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CryptGenKey( IntPtr providerContext, int algorithmId, int flags, out IntPtr cryptKeyHandle); [DllImport("AdvApi32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CryptDestroyKey( IntPtr cryptKeyHandle); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CertStrToNameW( int certificateEncodingType, IntPtr x500, int strType, IntPtr reserved, [MarshalAs(UnmanagedType.LPArray)] [Out] byte[] encoded, ref int encodedLength, out IntPtr errorString); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] public static extern IntPtr CertCreateSelfSignCertificate( IntPtr providerHandle, [In] ref CryptoApiBlob subjectIssuerBlob, int flags, [In] ref CryptKeyProviderInformation keyProviderInformation, IntPtr signatureAlgorithm, [In] ref SystemTime startTime, [In] ref SystemTime endTime, IntPtr extensions); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CertFreeCertificateContext( IntPtr certificateContext); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] public static extern IntPtr CertOpenStore( [MarshalAs(UnmanagedType.LPStr)] string storeProvider, int messageAndCertificateEncodingType, IntPtr cryptProvHandle, int flags, IntPtr parameters); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CertCloseStore( IntPtr certificateStoreHandle, int flags); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CertAddCertificateContextToStore( IntPtr certificateStoreHandle, IntPtr certificateContext, int addDisposition, out IntPtr storeContextPtr); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool CertSetCertificateContextProperty( IntPtr certificateContext, int propertyId, int flags, [In] ref CryptKeyProviderInformation data); [DllImport("Crypt32.dll", SetLastError = true, ExactSpelling = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool PFXExportCertStoreEx( IntPtr certificateStoreHandle, ref CryptoApiBlob pfxBlob, IntPtr password, IntPtr reserved, int flags); }}

希望本文所述对大家的C#程序设计有所帮助。