我在使用signedCMS.decode例程时遇到问题。请参阅下面的代码。
当文件大小太大（在这种情况下为11MB）时，似乎会发生错误。
private static void RemoveZfoSignature(string zfoFileName)
{
byte[] fileContents = File.ReadAllBytes(zfoFileName);
var contentInfo = new ContentInfo(fileContents);
var signedCms = new SignedCms(contentInfo);
// This line throws the error 100% of the time
signedCms.Decode(fileContents);
signedCms.RemoveSignature(0);
byte[] outfile = signedCms.ContentInfo.Content;
string outFileName = zfoFileName.Replace(".zfo", "_tmp.zfo");
File.WriteAllBytes(outFileName, outfile);
}
这是确切的错误：
"System.Security.Cryptography.CryptographicException: ASN1 out of memory. at System.Security.Cryptography.Pkcs.SignedCms.OpenToDecode(Byte[] encodedMessage, ContentInfo contentInfo, Boolean detached) at System.Security.Cryptography.Pkcs.SignedCms.Decode(Byte[] encodedMessage) at ConsoleApplication2.Program.RemoveZfoSignature(String zfoFileName) in C:\\Users\\\\Documents\\Visual Studio 2008\\Projects\\ConsoleApplication2\\ConsoleApplication2\\Program.cs:line 30"
有关如何解决这个问题的想法吗？
我现在已经更新了代码，但是现在它在removeSignature上失败了，说CMS消息没有签名。
/// <summary>
/// Removes the ZFO signature from the ZFO, so that it is possible to extract attachments.
/// </summary>
/// <param name="zfoFileName">
/// The zfo file name.
/// </param>
private static void RemoveZfoSignature(string zfoFileName)
{
string outFileName = zfoFileName.Replace(".zfo", "_tmp.zfo");
FileStream inFile = null;
FileStream outFile = null;
inFile = File.Open(zfoFileName, FileMode.Open);
outFile = File.Create(outFileName);
LargeCMS.CMS cms = new LargeCMS.CMS();
cms.Decode(inFile, outFile);
// Clean up
if (inFile != null) { inFile.Close(); }
if (outFile != null) { outFile.Close(); }
byte[] fileContents = File.ReadAllBytes(outFileName);
var contentInfo = new ContentInfo(fileContents);
var signedCms = new SignedCms(contentInfo);
//signedCms.Decode(fileContents);
signedCms.RemoveSignature(0);
byte[] outfileContent = signedCms.ContentInfo.Content;
File.WriteAllBytes(outFileName, outfileContent);
}
答案 0 :(得分：1)
根据this page：
ASN结构中有一个计数器，当包裹八位字节的ASN序列进行BER编码时，每次处理八位字节块时都会增加一个计数器。它添加了已经处理的字节数加上新的块大小;随着已添加到计数器的已处理字节数的增加以及计数器增长的速率增加。由于计数器由整数表示，它可以溢出。在Windows 7上，ASN代码检查溢出，因此函数失败。在Windows 7之前的平台上，仍然会发生溢出但未检查。该计数器对于操作并不重要，并且不会导致以前版本操作系统的代码出现问题。
唯一的解决方案似乎是调用该页面上列出的本机，低级功能。有关示例，请参阅here。
以下所有代码均来自该页面（如果页面出现故障，请复制此处）：
文件form1.cs：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Security.Cryptography.X509Certificates;
using System.IO;
namespace LargeCMS
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
subjectTextBox.Text = "ALEX";
originalTextBox.Text = "my1GBfile.txt";
encodedTextBox.Text = "encodeddata.p7s";
decodedTextBox.Text = "decodeddata.txt";
}
private void encodeButton_Click(object sender, EventArgs e)
{
// Variables
X509Store store = null;
X509Certificate2 cert = null;
FileStream inFile = null;
FileStream outFile = null;
CMS cms = null;
try
{
// Get user cert
store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.MaxAllowed);
cert = store.Certificates.Find(X509FindType.FindBySubjectName, subjectTextBox.Text, true)[0];
// Open file with data to encode
inFile = File.Open(originalTextBox.Text, FileMode.Open);
// Create file for encoded data
outFile = File.Create(encodedTextBox.Text);
// Encode data
cms = new CMS();
cms.Encode(cert, inFile, outFile);
MessageBox.Show("Sucess!!!");
}
catch (Exception ex)
{
// Show errors
if (ex.InnerException != null)
{
MessageBox.Show(ex.Message + "\n" + ex.InnerException.Message);
}
else
{
MessageBox.Show(ex.Message);
}
}
finally
{
// Clean up
if (store != null) { store.Close(); }
if (inFile != null) { inFile.Close(); }
if (outFile != null) { outFile.Close(); }
}
}
private void decodeButton_Click(object sender, EventArgs e)
{
// Variables
FileStream inFile = null;
FileStream outFile = null;
CMS cms = null;
try
{
// Open file with data to decode
inFile = File.Open(encodedTextBox.Text, FileMode.Open);
// Create file for encoded data
outFile = File.Create(decodedTextBox.Text);
// Decode data
cms = new CMS();
cms.Decode(inFile, outFile);
MessageBox.Show("Sucess!!!");
}
catch (Exception ex)
{
if (ex.InnerException != null)
{
MessageBox.Show(ex.Message + "\n" + ex.InnerException.Message);
}
else
{
MessageBox.Show(ex.Message);
}
}
finally
{
// Clean up
if (inFile != null) { inFile.Close(); }
if (outFile != null) { outFile.Close(); }
}
}
}
}
文件cms.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Runtime.InteropServices;
using System.ComponentModel;
namespace LargeCMS
{
class CMS
{
// File stream to use in callback function
private FileStream m_callbackFile;
// Streaming callback function for encoding
private Boolean StreamOutputCallback(IntPtr pvArg, IntPtr pbData, int cbData, Boolean fFinal)
{
// Write all bytes to encoded file
Byte[] bytes = new Byte[cbData];
Marshal.Copy(pbData, bytes, 0, cbData);
m_callbackFile.Write(bytes, 0, cbData);
if (fFinal)
{
// This is the last piece. Close the file
m_callbackFile.Flush();
m_callbackFile.Close();
m_callbackFile = null;
}
return true;
}
// Encode CMS with streaming to support large data
public void Encode(X509Certificate2 cert, FileStream inFile, FileStream outFile)
{
// Variables
Win32.CMSG_SIGNER_ENCODE_INFO SignerInfo;
Win32.CMSG_SIGNED_ENCODE_INFO SignedInfo;
Win32.CMSG_STREAM_INFO StreamInfo;
Win32.CERT_CONTEXT[] CertContexts = null;
Win32.BLOB[] CertBlobs;
X509Chain chain = null;
X509ChainElement[] chainElements = null;
X509Certificate2[] certs = null;
RSACryptoServiceProvider key = null;
BinaryReader stream = null;
GCHandle gchandle = new GCHandle();
IntPtr hProv = IntPtr.Zero;
IntPtr SignerInfoPtr = IntPtr.Zero;
IntPtr CertBlobsPtr = IntPtr.Zero;
IntPtr hMsg = IntPtr.Zero;
IntPtr pbPtr = IntPtr.Zero;
Byte[] pbData;
int dwFileSize;
int dwRemaining;
int dwSize;
Boolean bResult = false;
try
{
// Get data to encode
dwFileSize = (int)inFile.Length;
stream = new BinaryReader(inFile);
pbData = stream.ReadBytes(dwFileSize);
// Prepare stream for encoded info
m_callbackFile = outFile;
// Get cert chain
chain = new X509Chain();
chain.Build(cert);
chainElements = new X509ChainElement[chain.ChainElements.Count];
chain.ChainElements.CopyTo(chainElements, 0);
// Get certs in chain
certs = new X509Certificate2[chainElements.Length];
for (int i = 0; i < chainElements.Length; i++)
{
certs[i] = chainElements[i].Certificate;
}
// Get context of all certs in chain
CertContexts = new Win32.CERT_CONTEXT[certs.Length];
for (int i = 0; i < certs.Length; i++)
{
CertContexts[i] = (Win32.CERT_CONTEXT)Marshal.PtrToStructure(certs[i].Handle, typeof(Win32.CERT_CONTEXT));
}
// Get cert blob of all certs
CertBlobs = new Win32.BLOB[CertContexts.Length];
for (int i = 0; i < CertContexts.Length; i++)
{
CertBlobs[i].cbData = CertContexts[i].cbCertEncoded;
CertBlobs[i].pbData = CertContexts[i].pbCertEncoded;
}
// Get CSP of client certificate
key = (RSACryptoServiceProvider)certs[0].PrivateKey;
bResult = Win32.CryptAcquireContext(
ref hProv,
key.CspKeyContainerInfo.KeyContainerName,
key.CspKeyContainerInfo.ProviderName,
key.CspKeyContainerInfo.ProviderType,
0
);
if (!bResult)
{
throw new Exception("CryptAcquireContext error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Populate Signer Info struct
SignerInfo = new Win32.CMSG_SIGNER_ENCODE_INFO();
SignerInfo.cbSize = Marshal.SizeOf(SignerInfo);
SignerInfo.pCertInfo = CertContexts[0].pCertInfo;
SignerInfo.hCryptProvOrhNCryptKey = hProv;
SignerInfo.dwKeySpec = (int)key.CspKeyContainerInfo.KeyNumber;
SignerInfo.HashAlgorithm.pszObjId = Win32.szOID_OIWSEC_sha1;
// Populate Signed Info struct
SignedInfo = new Win32.CMSG_SIGNED_ENCODE_INFO();
SignedInfo.cbSize = Marshal.SizeOf(SignedInfo);
SignedInfo.cSigners = 1;
SignerInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(SignerInfo));
Marshal.StructureToPtr(SignerInfo, SignerInfoPtr, false);
SignedInfo.rgSigners = SignerInfoPtr;
SignedInfo.cCertEncoded = CertBlobs.Length;
CertBlobsPtr = Marshal.AllocHGlobal(Marshal.SizeOf(CertBlobs[0]) * CertBlobs.Length);
for (int i = 0; i < CertBlobs.Length; i++)
{
Marshal.StructureToPtr(CertBlobs[i], new IntPtr(CertBlobsPtr.ToInt64() + (Marshal.SizeOf(CertBlobs[i]) * i)), false);
}
SignedInfo.rgCertEncoded = CertBlobsPtr;
// Populate Stream Info struct
StreamInfo = new Win32.CMSG_STREAM_INFO();
StreamInfo.cbContent = dwFileSize;
StreamInfo.pfnStreamOutput = new Win32.StreamOutputCallbackDelegate(StreamOutputCallback);
// TODO: CMSG_DETACHED_FLAG
// Open message to encode
hMsg = Win32.CryptMsgOpenToEncode(
Win32.X509_ASN_ENCODING | Win32.PKCS_7_ASN_ENCODING,
0,
Win32.CMSG_SIGNED,
ref SignedInfo,
null,
ref StreamInfo
);
if (hMsg.Equals(IntPtr.Zero))
{
throw new Exception("CryptMsgOpenToEncode error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Process the whole message
gchandle = GCHandle.Alloc(pbData, GCHandleType.Pinned);
pbPtr = gchandle.AddrOfPinnedObject();
dwRemaining = dwFileSize;
dwSize = (dwFileSize < 1024 * 1000 * 100) ? dwFileSize : 1024 * 1000 * 100;
while (dwRemaining > 0)
{
// Update message piece by piece
bResult = Win32.CryptMsgUpdate(
hMsg,
pbPtr,
dwSize,
(dwRemaining <= dwSize) ? true : false
);
if (!bResult)
{
throw new Exception("CryptMsgUpdate error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Move to the next piece
pbPtr = new IntPtr(pbPtr.ToInt64() + dwSize);
dwRemaining -= dwSize;
if (dwRemaining < dwSize)
{
dwSize = dwRemaining;
}
}
}
finally
{
// Clean up
if (gchandle.IsAllocated)
{
gchandle.Free();
}
if (stream != null)
{
stream.Close();
}
if (m_callbackFile != null)
{
m_callbackFile.Close();
}
if (!CertBlobsPtr.Equals(IntPtr.Zero))
{
Marshal.FreeHGlobal(CertBlobsPtr);
}
if (!SignerInfoPtr.Equals(IntPtr.Zero))
{
Marshal.FreeHGlobal(SignerInfoPtr);
}
if (!hProv.Equals(IntPtr.Zero))
{
Win32.CryptReleaseContext(hProv, 0);
}
if (!hMsg.Equals(IntPtr.Zero))
{
Win32.CryptMsgClose(hMsg);
}
}
}
// Decode CMS with streaming to support large data
public void Decode(FileStream inFile, FileStream outFile)
{
// Variables
Win32.CMSG_STREAM_INFO StreamInfo;
Win32.CERT_CONTEXT SignerCertContext;
BinaryReader stream = null;
GCHandle gchandle = new GCHandle();
IntPtr hMsg = IntPtr.Zero;
IntPtr pSignerCertInfo = IntPtr.Zero;
IntPtr pSignerCertContext = IntPtr.Zero;
IntPtr pbPtr = IntPtr.Zero;
IntPtr hStore = IntPtr.Zero;
Byte[] pbData;
Boolean bResult = false;
int dwFileSize;
int dwRemaining;
int dwSize;
int cbSignerCertInfo;
try
{
// Get data to decode
dwFileSize = (int)inFile.Length;
stream = new BinaryReader(inFile);
pbData = stream.ReadBytes(dwFileSize);
// Prepare stream for decoded info
m_callbackFile = outFile;
// Populate Stream Info struct
StreamInfo = new Win32.CMSG_STREAM_INFO();
StreamInfo.cbContent = dwFileSize;
StreamInfo.pfnStreamOutput = new Win32.StreamOutputCallbackDelegate(StreamOutputCallback);
// Open message to decode
hMsg = Win32.CryptMsgOpenToDecode(
Win32.X509_ASN_ENCODING | Win32.PKCS_7_ASN_ENCODING,
0,
0,
IntPtr.Zero,
IntPtr.Zero,
ref StreamInfo
);
if (hMsg.Equals(IntPtr.Zero))
{
throw new Exception("CryptMsgOpenToDecode error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Process the whole message
gchandle = GCHandle.Alloc(pbData, GCHandleType.Pinned);
pbPtr = gchandle.AddrOfPinnedObject();
dwRemaining = dwFileSize;
dwSize = (dwFileSize < 1024 * 1000 * 100) ? dwFileSize : 1024 * 1000 * 100;
while (dwRemaining > 0)
{
// Update message piece by piece
bResult = Win32.CryptMsgUpdate(
hMsg,
pbPtr,
dwSize,
(dwRemaining <= dwSize) ? true : false
);
if (!bResult)
{
throw new Exception("CryptMsgUpdate error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Move to the next piece
pbPtr = new IntPtr(pbPtr.ToInt64() + dwSize);
dwRemaining -= dwSize;
if (dwRemaining < dwSize)
{
dwSize = dwRemaining;
}
}
// Get signer certificate info
cbSignerCertInfo = 0;
bResult = Win32.CryptMsgGetParam(
hMsg,
Win32.CMSG_SIGNER_CERT_INFO_PARAM,
0,
IntPtr.Zero,
ref cbSignerCertInfo
);
if (!bResult)
{
throw new Exception("CryptMsgGetParam error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
pSignerCertInfo = Marshal.AllocHGlobal(cbSignerCertInfo);
bResult = Win32.CryptMsgGetParam(
hMsg,
Win32.CMSG_SIGNER_CERT_INFO_PARAM,
0,
pSignerCertInfo,
ref cbSignerCertInfo
);
if (!bResult)
{
throw new Exception("CryptMsgGetParam error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Open a cert store in memory with the certs from the message
hStore = Win32.CertOpenStore(
Win32.CERT_STORE_PROV_MSG,
Win32.X509_ASN_ENCODING | Win32.PKCS_7_ASN_ENCODING,
IntPtr.Zero,
0,
hMsg
);
if (hStore.Equals(IntPtr.Zero))
{
throw new Exception("CertOpenStore error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Find the signer's cert in the store
pSignerCertContext = Win32.CertGetSubjectCertificateFromStore(
hStore,
Win32.X509_ASN_ENCODING | Win32.PKCS_7_ASN_ENCODING,
pSignerCertInfo
);
if (pSignerCertContext.Equals(IntPtr.Zero))
{
throw new Exception("CertGetSubjectCertificateFromStore error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
// Set message for verifying
SignerCertContext = (Win32.CERT_CONTEXT)Marshal.PtrToStructure(pSignerCertContext, typeof(Win32.CERT_CONTEXT));
bResult = Win32.CryptMsgControl(
hMsg,
0,
Win32.CMSG_CTRL_VERIFY_SIGNATURE,
SignerCertContext.pCertInfo
);
if (!bResult)
{
throw new Exception("CryptMsgControl error #" + Marshal.GetLastWin32Error().ToString(), new Win32Exception(Marshal.GetLastWin32Error()));
}
}
finally
{
// Clean up
if (gchandle.IsAllocated)
{
gchandle.Free();
}
if (!pSignerCertContext.Equals(IntPtr.Zero))
{
Win32.CertFreeCertificateContext(pSignerCertContext);
}
if (!pSignerCertInfo.Equals(IntPtr.Zero))
{
Marshal.FreeHGlobal(pSignerCertInfo);
}
if (!hStore.Equals(IntPtr.Zero))
{
Win32.CertCloseStore(hStore, Win32.CERT_CLOSE_STORE_FORCE_FLAG);
}
if (stream != null)
{
stream.Close();
}
if (m_callbackFile != null)
{
m_callbackFile.Close();
}
if (!hMsg.Equals(IntPtr.Zero))
{
Win32.CryptMsgClose(hMsg);
}
}
}
}
}
答案 1 :(得分：1)
我似乎达到了后期限制。以下是上面提到的the link的其余代码。
文件win32.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Security.Cryptography.X509Certificates;
using System.ComponentModel;
using System.Security.Cryptography;
namespace LargeCMS
{
class Win32
{
#region "CONSTS"
public const int X509_ASN_ENCODING = 0x00000001;
public const int PKCS_7_ASN_ENCODING = 0x00010000;
public const int CMSG_SIGNED = 2;
public const int CMSG_DETACHED_FLAG = 0x00000004;
public const int AT_KEYEXCHANGE = 1;
public const int AT_SIGNATURE = 2;
public const String szOID_OIWSEC_sha1 = "1.3.14.3.2.26";
public const int CMSG_CTRL_VERIFY_SIGNATURE = 1;
public const int CMSG_CERT_PARAM = 12;
public const int CMSG_SIGNER_CERT_INFO_PARAM = 7;
public const int CERT_STORE_PROV_MSG = 1;
public const int CERT_CLOSE_STORE_FORCE_FLAG = 1;
#endregion
#region "STRUCTS"
[StructLayout(LayoutKind.Sequential)]
public struct CRYPT_ALGORITHM_IDENTIFIER
{
public String pszObjId;
BLOB Parameters;
}
[StructLayout(LayoutKind.Sequential)]
public struct CERT_ID
{
public int dwIdChoice;
public BLOB IssuerSerialNumberOrKeyIdOrHashId;
}
[StructLayout(LayoutKind.Sequential)]
public struct CMSG_SIGNER_ENCODE_INFO
{
public int cbSize;
public IntPtr pCertInfo;
public IntPtr hCryptProvOrhNCryptKey;
public int dwKeySpec;
public CRYPT_ALGORITHM_IDENTIFIER HashAlgorithm;
public IntPtr pvHashAuxInfo;
public int cAuthAttr;
public IntPtr rgAuthAttr;
public int cUnauthAttr;
public IntPtr rgUnauthAttr;
public CERT_ID SignerId;
public CRYPT_ALGORITHM_IDENTIFIER HashEncryptionAlgorithm;
public IntPtr pvHashEncryptionAuxInfo;
}
[StructLayout(LayoutKind.Sequential)]
public struct CERT_CONTEXT
{
public int dwCertEncodingType;
public IntPtr pbCertEncoded;
public int cbCertEncoded;
public IntPtr pCertInfo;
public IntPtr hCertStore;
}
[StructLayout(LayoutKind.Sequential)]
public struct BLOB
{
public int cbData;
public IntPtr pbData;
}
[StructLayout(LayoutKind.Sequential)]
public struct CMSG_SIGNED_ENCODE_INFO
{
public int cbSize;
public int cSigners;
public IntPtr rgSigners;
public int cCertEncoded;
public IntPtr rgCertEncoded;
public int cCrlEncoded;
public IntPtr rgCrlEncoded;
public int cAttrCertEncoded;
public IntPtr rgAttrCertEncoded;
}
[StructLayout(LayoutKind.Sequential)]
public struct CMSG_STREAM_INFO
{
public int cbContent;
public StreamOutputCallbackDelegate pfnStreamOutput;
public IntPtr pvArg;
}
#endregion
#region "DELEGATES"
public delegate Boolean StreamOutputCallbackDelegate(IntPtr pvArg, IntPtr pbData, int cbData, Boolean fFinal);
#endregion
#region "API"
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern Boolean CryptAcquireContext(
ref IntPtr hProv,
String pszContainer,
String pszProvider,
int dwProvType,
int dwFlags
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern IntPtr CryptMsgOpenToEncode(
int dwMsgEncodingType,
int dwFlags,
int dwMsgType,
ref CMSG_SIGNED_ENCODE_INFO pvMsgEncodeInfo,
String pszInnerContentObjID,
ref CMSG_STREAM_INFO pStreamInfo
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern IntPtr CryptMsgOpenToDecode(
int dwMsgEncodingType,
int dwFlags,
int dwMsgType,
IntPtr hCryptProv,
IntPtr pRecipientInfo,
ref CMSG_STREAM_INFO pStreamInfo
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern Boolean CryptMsgClose(
IntPtr hCryptMsg
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern Boolean CryptMsgUpdate(
IntPtr hCryptMsg,
Byte[] pbData,
int cbData,
Boolean fFinal
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern Boolean CryptMsgUpdate(
IntPtr hCryptMsg,
IntPtr pbData,
int cbData,
Boolean fFinal
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern Boolean CryptMsgGetParam(
IntPtr hCryptMsg,
int dwParamType,
int dwIndex,
IntPtr pvData,
ref int pcbData
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern Boolean CryptMsgControl(
IntPtr hCryptMsg,
int dwFlags,
int dwCtrlType,
IntPtr pvCtrlPara
);
[DllImport("advapi32.dll", SetLastError = true)]
public static extern Boolean CryptReleaseContext(
IntPtr hProv,
int dwFlags
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern IntPtr CertCreateCertificateContext(
int dwCertEncodingType,
IntPtr pbCertEncoded,
int cbCertEncoded
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern Boolean CertFreeCertificateContext(
IntPtr pCertContext
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern IntPtr CertOpenStore(
int lpszStoreProvider,
int dwMsgAndCertEncodingType,
IntPtr hCryptProv,
int dwFlags,
IntPtr pvPara
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern IntPtr CertGetSubjectCertificateFromStore(
IntPtr hCertStore,
int dwCertEncodingType,
IntPtr pCertId
);
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern IntPtr CertCloseStore(
IntPtr hCertStore,
int dwFlags
);
#endregion
}
}
答案 2 :(得分：0)
如果您在文件上看到此错误＆lt; 100 MB，仅在Windows 7上，可能是由于Windows 7 64位中的一个错误。我两周前向微软报告了这一消息，并于今天收到了一封电子邮件，确认该错误并声明修复程序正在进行内部测试，并且很可能会在2011年2月到期之前包含在Win 7 SP1中（未确认日期）。
如果您迫不及待，其他人建议的Win32 / CryptMsg解决方案似乎是最好的解决方法。
更新：微软今天发布了官方修复程序，请点击此处：http://support.microsoft.com/kb/2480994 他们还确认此修复程序将包含在SP2中，而不是SP1中。