void decodeUnauthAttr(Wincrypt.CRYPT_ATTRIBUTES unauthAttrs)
{
if (unauthAttrs.cAttr == 0)
{
return;
}
IntPtr rgValue = unauthAttrs.rgAttr;
Int32 size = Marshal.SizeOf(typeof(Wincrypt.CRYPT_ATTRIBUTE));
UnauthenticatedAttributes = new X509AttributeCollection();
for (Int32 index = 0; index < unauthAttrs.cAttr; index++)
{
Wincrypt.CRYPT_ATTRIBUTE attr = (Wincrypt.CRYPT_ATTRIBUTE)Marshal.PtrToStructure(rgValue, typeof(Wincrypt.CRYPT_ATTRIBUTE));
UnauthenticatedAttributes.Add(new X509Attribute(attr));
rgValue += size;
}
}
void decode(Byte[] rawData)
{
var asn = new Asn1Reader(rawData);
asn.MoveNextAndExpectTags((Byte)Asn1Type.OCTET_STRING);
Thumbprint = AsnFormatter.BinaryToString(asn.GetPayload(), format: EncodingFormat.NOCRLF, forceUpperCase: true);
// check if there are attributes
if (asn.MoveNext() && asn.Tag == 49)
{
Byte[] attrBytes = asn.GetTagRawData();
// in CTL attributes are encoded as SET, but we need SEQUENCE, so change first byte to SEQUENCE (48)
attrBytes[0] = 48;
var attributes = new X509AttributeCollection();
// decode attributes into collection
attributes.Decode(attrBytes);
// and then add decoded attributes to internal list.
_attributes.AddRange(attributes);
}
}
void get_ctlentries()
{
if (CTLInfo.cCTLEntry > 0)
{
Entries = new X509CTLEntryCollection();
IntPtr rgCTLEntry = CTLInfo.rgCTLEntry;
for (Int32 index = 0; index < CTLInfo.cCTLEntry; index++)
{
StringBuilder SB = new StringBuilder();
X509AttributeCollection attributes = new X509AttributeCollection();
Wincrypt.CTL_ENTRY CTLEntry = (Wincrypt.CTL_ENTRY)Marshal.PtrToStructure(rgCTLEntry, typeof(Wincrypt.CTL_ENTRY));
byte[] bytes = new Byte[CTLEntry.SubjectIdentifier.cbData];
Marshal.Copy(CTLEntry.SubjectIdentifier.pbData, bytes, 0, bytes.Length);
foreach (Byte item in bytes)
{
SB.Append($"{item:X2}");
}
String thumbprint = SB.ToString();
if (CTLEntry.cAttribute > 0)
{
IntPtr rgAttribute = CTLEntry.rgAttribute;
for (Int32 indexx = 0; indexx < CTLEntry.cAttribute; indexx++)
{
Wincrypt.CRYPT_ATTRIBUTE attrib = (Wincrypt.CRYPT_ATTRIBUTE)Marshal.PtrToStructure(rgAttribute, typeof(Wincrypt.CRYPT_ATTRIBUTE));
Oid pszOid = new Oid(attrib.pszObjId);
Wincrypt.CRYPTOAPI_BLOB blob = (Wincrypt.CRYPTOAPI_BLOB)Marshal.PtrToStructure(attrib.rgValue, typeof(Wincrypt.CRYPTOAPI_BLOB));
bytes = new Byte[blob.cbData];
Marshal.Copy(blob.pbData, bytes, 0, bytes.Length);
attributes.Add(new X509Attribute(pszOid, bytes));
rgAttribute = (IntPtr)((UInt64)rgAttribute + (UInt32)Marshal.SizeOf(typeof(Wincrypt.CRYPT_ATTRIBUTE)));
}
}
Entries.Add(new X509CTLEntry(thumbprint, attributes));
rgCTLEntry = (IntPtr)((UInt64)rgCTLEntry + (UInt32)Marshal.SizeOf(typeof(Wincrypt.CTL_ENTRY)));
}
}
}
internal X509CTLEntry(String thumbprint, X509AttributeCollection attributes)
{
m_initialize(thumbprint, attributes);
}
void m_initialize(String thumprint, X509AttributeCollection attributes)
{
Thumbprint = thumprint;
Attributes = attributes;
get_cert();
}