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我正在使用SignedXML類進行rsa-sha256 xml簽名。但問題是我需要改變CSP來支持sha256。如何更改RSACryptoServiceProvider的CSP參數
這就是我如何選擇證書,
public X509Certificate2 GetCertificateFromStore()
{
X509Store st = new X509Store(StoreName.My, StoreLocation.CurrentUser);
st.Open(OpenFlags.ReadOnly);
X509Certificate2Collection col = st.Certificates.Find(X509FindType.FindByTimeValid, (object)DateTime.Now, false);
X509Certificate2 x509Certificate =null;
X509Certificate2Collection sel = X509Certificate2UI.SelectFromCollection(col, "Certificate", "Select single certificate to sign", X509SelectionFlag.SingleSelection);
if (sel.Count > 0)
{
X509Certificate2Enumerator en = sel.GetEnumerator();
en.MoveNext();
x509Certificate = en.Current;
}
st.Close();
//x509Certificate.s
return x509Certificate;
}
這是我正在試圖改變CSP參數。
byte[] privateKeyBlob;
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa = cert.PrivateKey as RSACryptoServiceProvider;
try
{
privateKeyBlob = rsa.ExportCspBlob(true);
}
catch
{
throw new ApplicationException("Private key fails to export");
}
// To use the RSA-SHA256 the CryptoAPI needs to select a special CSP: Microsoft Enhanced RSA and AES Cryptographic Provider
// By reinstantiating a CSP of type 24 we ensure that we get the right CSP.
CspParameters cp = new CspParameters(24);
rsa = new RSACryptoServiceProvider(cp);
rsa.ImportCspBlob(privateKeyBlob);
signer.SigningKey = rsa;
signer.KeyInfo = getKeyInfo(signer, cert);
問題是我使用USB設備令牌,我懷疑私鑰是不可導出的。在導出時拋出一個錯誤'密鑰在指定狀態下無效。'。
任何人都可以幫助如何做到這一點?
哪一行是異常拋出? – craig1231 2012-07-28 09:59:55
這一行privateKeyBlob = rsa.ExportCspBlob(true); – Matt 2012-07-28 10:16:01
是http://stackoverflow.com/q/10673146/589259有幫助嗎? – 2012-07-28 11:50:56