public X509Certificate2Collection Find(X509FindType findType, object findValue, bool validOnly)
{
DiagnosticUtility.DebugAssert(!this.certStoreHandle.IsInvalid, "");
uint dwFindType;
SafeHGlobalHandle pvFindPara = SafeHGlobalHandle.InvalidHandle;
SafeCertContextHandle pCertContext = SafeCertContextHandle.InvalidHandle;
X509Certificate2Collection result = new X509Certificate2Collection();
SafeHGlobalHandle pvTemp = SafeHGlobalHandle.InvalidHandle;
string strFindValue;
byte[] bytes;
try
{
switch (findType)
{
case X509FindType.FindBySubjectName:
strFindValue = findValue as string;
if (strFindValue == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.X509FindValueMismatch, findType, typeof(string), findValue.GetType())));
}
dwFindType = CAPI.CERT_FIND_SUBJECT_STR;
pvFindPara = SafeHGlobalHandle.AllocHGlobal(strFindValue);
break;
case X509FindType.FindByThumbprint:
bytes = findValue as byte[];
if (bytes == null)
{
strFindValue = findValue as string;
if (strFindValue == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.X509FindValueMismatchMulti, findType, typeof(string), typeof(byte[]), findValue.GetType())));
}
bytes = SecurityUtils.DecodeHexString(strFindValue);
}
CAPI.CRYPTOAPI_BLOB blob = new CAPI.CRYPTOAPI_BLOB();
pvTemp = SafeHGlobalHandle.AllocHGlobal(bytes);
blob.pbData = pvTemp.DangerousGetHandle();
blob.cbData = (uint)bytes.Length;
dwFindType = CAPI.CERT_FIND_HASH;
pvFindPara = SafeHGlobalHandle.AllocHGlobal(CAPI.CRYPTOAPI_BLOB.Size);
Marshal.StructureToPtr(blob, pvFindPara.DangerousGetHandle(), false);
break;
case X509FindType.FindBySubjectDistinguishedName:
if (!(findValue is string))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.X509FindValueMismatch, findType, typeof(string), findValue.GetType())));
}
dwFindType = CAPI.CERT_FIND_ANY;
break;
case X509FindType.FindByIssuerName:
strFindValue = findValue as string;
if (strFindValue == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.X509FindValueMismatch, findType, typeof(string), findValue.GetType())));
}
dwFindType = CAPI.CERT_FIND_ISSUER_STR;
pvFindPara = SafeHGlobalHandle.AllocHGlobal(strFindValue);
break;
case X509FindType.FindByIssuerDistinguishedName:
if (!(findValue is string))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.X509FindValueMismatch, findType, typeof(string), findValue.GetType())));
}
dwFindType = CAPI.CERT_FIND_ANY;
break;
case X509FindType.FindBySerialNumber:
bytes = findValue as byte[];
if (bytes == null)
{
strFindValue = findValue as string;
if (strFindValue == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.X509FindValueMismatchMulti, findType, typeof(string), typeof(byte[]), findValue.GetType())));
}
bytes = SecurityUtils.DecodeHexString(strFindValue);
// reverse bits
int len = bytes.Length;
for (int i = 0, j = len - 1; i < bytes.Length / 2; ++i, --j)
{
byte tmp = bytes[i];
bytes[i] = bytes[j];
bytes[j] = tmp;
}
}
findValue = bytes;
dwFindType = CAPI.CERT_FIND_ANY;
break;
case X509FindType.FindBySubjectKeyIdentifier:
bytes = findValue as byte[];
if (bytes == null)
{
strFindValue = findValue as string;
if (strFindValue == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.X509FindValueMismatchMulti, findType, typeof(string), typeof(byte[]), findValue.GetType())));
}
bytes = SecurityUtils.DecodeHexString(strFindValue);
}
findValue = bytes;
dwFindType = CAPI.CERT_FIND_ANY;
break;
default:
// Fallback to CLR implementation
X509Store store = new X509Store(this.certStoreHandle.DangerousGetHandle());
try
{
return(store.Certificates.Find(findType, findValue, validOnly));
}
finally
{
store.Close();
}
}
#pragma warning suppress 56523 // We are not interested in CRYPT_E_NOT_FOUND error, it return null anyway.
pCertContext = CAPI.CertFindCertificateInStore(this.certStoreHandle,
CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING,
0,
dwFindType,
pvFindPara,
pCertContext);
while (pCertContext != null && !pCertContext.IsInvalid)
{
X509Certificate2 cert;
if (TryGetMatchingX509Certificate(pCertContext.DangerousGetHandle(), findType,
dwFindType, findValue, validOnly, out cert))
{
result.Add(cert);
}
// CER
RuntimeHelpers.PrepareConstrainedRegions();
try { }
finally
{
// Suppress the finalizer
#pragma warning suppress 56508 // CertFindCertificateInStore will release the prev one.
GC.SuppressFinalize(pCertContext);
#pragma warning suppress 56523 // We are not interested in CRYPT_E_NOT_FOUND error, it return null anyway.
pCertContext = CAPI.CertFindCertificateInStore(this.certStoreHandle,
CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING,
0,
dwFindType,
pvFindPara,
pCertContext);
}
}
}
finally
{
if (pCertContext != null)
{
pCertContext.Close();
}
pvFindPara.Close();
pvTemp.Close();
}
return(result);
}