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X509CertificateStore.cs
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X509CertificateStore.cs
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/* Copyright (c) 1996-2022 The OPC Foundation. All rights reserved.
The source code in this file is covered under a dual-license scenario:
- RCL: for OPC Foundation Corporate Members in good-standing
- GPL V2: everybody else
RCL license terms accompanied with this source code. See http://opcfoundation.org/License/RCL/1.00/
GNU General Public License as published by the Free Software Foundation;
version 2 of the License are accompanied with this source code. See http://opcfoundation.org/License/GPLv2
This source code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
using System;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using Opc.Ua.Security.Certificates;
namespace Opc.Ua
{
/// <summary>
/// Provides access to a simple X509Store based certificate store.
/// </summary>
public class X509CertificateStore : ICertificateStore
{
/// <summary>
/// Create an instance of the certificate store.
/// </summary>
public X509CertificateStore()
{
// defaults
m_storeName = "My";
m_storeLocation = StoreLocation.CurrentUser;
}
/// <inheritdoc/>
public void Dispose()
{
Dispose(true);
}
/// <summary>
/// Dispose method for derived classes.
/// </summary>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
Close();
}
}
/// <summary cref="ICertificateStore.Open(string, bool)" />
/// <remarks>
/// Syntax: StoreLocation\StoreName
/// Example:
/// CurrentUser\My
/// </remarks>
public void Open(string location, bool noPrivateKeys = true)
{
if (location == null) throw new ArgumentNullException(nameof(location));
m_storePath = location;
m_noPrivateKeys = noPrivateKeys;
location = location.Trim();
if (string.IsNullOrEmpty(location))
{
throw ServiceResultException.Create(
StatusCodes.BadUnexpectedError,
"Store Location cannot be empty.");
}
// extract store name.
int index = location.IndexOf('\\');
if (index == -1)
{
throw ServiceResultException.Create(
StatusCodes.BadUnexpectedError,
"Path does not specify a store name. Path={0}",
location);
}
// extract store location.
string storeLocation = location.Substring(0, index);
bool found = false;
foreach (StoreLocation availableLocation in (StoreLocation[])Enum.GetValues(typeof(StoreLocation)))
{
if (availableLocation.ToString().Equals(storeLocation, StringComparison.OrdinalIgnoreCase))
{
m_storeLocation = availableLocation;
found = true;
}
}
if (!found)
{
var message = new StringBuilder();
message.AppendLine("Store location specified not available.");
message.AppendLine("Store location={0}");
throw ServiceResultException.Create(StatusCodes.BadUnexpectedError,
message.ToString(), storeLocation);
}
m_storeName = location.Substring(index + 1);
}
/// <inheritdoc/>
public void Close()
{
// nothing to do
}
/// <inheritdoc/>
public string StoreType => CertificateStoreType.X509Store;
/// <inheritdoc/>
public string StorePath => m_storePath;
/// <inheritdoc/>
public Task<X509Certificate2Collection> Enumerate()
{
using (X509Store store = new X509Store(m_storeName, m_storeLocation))
{
store.Open(OpenFlags.ReadOnly);
return Task.FromResult(new X509Certificate2Collection(store.Certificates));
}
}
/// <inheritdoc/>
public Task Add(X509Certificate2 certificate, string password = null)
{
if (certificate == null) throw new ArgumentNullException(nameof(certificate));
using (X509Store store = new X509Store(m_storeName, m_storeLocation))
{
store.Open(OpenFlags.ReadWrite);
if (!store.Certificates.Contains(certificate))
{
if (certificate.HasPrivateKey && !m_noPrivateKeys)
{
// X509Store needs a persisted private key
var persistedCertificate = X509Utils.CreateCopyWithPrivateKey(certificate, true);
store.Add(persistedCertificate);
}
else if (certificate.HasPrivateKey && m_noPrivateKeys)
{
// ensure no private key is added to store
using (var publicKey = new X509Certificate2(certificate.RawData))
{
store.Add(publicKey);
}
}
else
{
store.Add(certificate);
}
Utils.LogCertificate("Added certificate to X509Store {0}.", certificate, store.Name);
}
}
return Task.CompletedTask;
}
/// <inheritdoc/>
public Task<bool> Delete(string thumbprint)
{
using (X509Store store = new X509Store(m_storeName, m_storeLocation))
{
store.Open(OpenFlags.ReadWrite);
foreach (X509Certificate2 certificate in store.Certificates)
{
if (certificate.Thumbprint == thumbprint)
{
store.Remove(certificate);
}
}
}
return Task.FromResult(true);
}
/// <inheritdoc/>
public Task<X509Certificate2Collection> FindByThumbprint(string thumbprint)
{
using (X509Store store = new X509Store(m_storeName, m_storeLocation))
{
store.Open(OpenFlags.ReadOnly);
X509Certificate2Collection collection = new X509Certificate2Collection();
foreach (X509Certificate2 certificate in store.Certificates)
{
if (certificate.Thumbprint == thumbprint)
{
collection.Add(certificate);
}
}
return Task.FromResult(collection);
}
}
/// <inheritdoc/>
public bool SupportsLoadPrivateKey => false;
/// <inheritdoc/>
/// <remarks>The LoadPrivateKey special handling is not necessary in this store.</remarks>
public Task<X509Certificate2> LoadPrivateKey(string thumbprint, string subjectName, string password)
{
return Task.FromResult<X509Certificate2>(null);
}
/// <inheritdoc/>
/// <remarks>CRLs are not supported here.</remarks>
public bool SupportsCRLs => false;
/// <inheritdoc/>
/// <remarks>CRLs are not supported here.</remarks>
public Task<StatusCode> IsRevoked(X509Certificate2 issuer, X509Certificate2 certificate)
{
return Task.FromResult((StatusCode)StatusCodes.BadNotSupported);
}
/// <inheritdoc/>
/// <remarks>CRLs are not supported here.</remarks>
public Task<X509CRLCollection> EnumerateCRLs()
{
throw new ServiceResultException(StatusCodes.BadNotSupported);
}
/// <inheritdoc/>
/// <remarks>CRLs are not supported here.</remarks>
public Task<X509CRLCollection> EnumerateCRLs(X509Certificate2 issuer, bool validateUpdateTime = true)
{
throw new ServiceResultException(StatusCodes.BadNotSupported);
}
/// <inheritdoc/>
/// <remarks>CRLs are not supported here.</remarks>
public Task AddCRL(X509CRL crl)
{
throw new ServiceResultException(StatusCodes.BadNotSupported);
}
/// <inheritdoc/>
/// <remarks>CRLs are not supported here.</remarks>
public Task<bool> DeleteCRL(X509CRL crl)
{
throw new ServiceResultException(StatusCodes.BadNotSupported);
}
private bool m_noPrivateKeys;
private string m_storeName;
private string m_storePath;
private StoreLocation m_storeLocation;
}
}