void m_initialize(OidCollection applicationPolicies, Boolean critical) {
Oid = _oid;
Critical = critical;
List<Byte> rawData = new List<Byte>();
foreach (Oid aoid in applicationPolicies.Cast<Oid>().Where(aoid => !String.IsNullOrEmpty(aoid.Value))) {
_oids.Add(aoid);
rawData.AddRange(Asn1Utils.Encode(Asn1Utils.EncodeObjectIdentifier(aoid), 48));
}
RawData = Asn1Utils.Encode(rawData.ToArray(), 48);
}
/// <summary>
/// Adapted from .NET source <see cref="System.Security.Cryptography.X509Certificates.X509Utils.CopyOidsToUnmanagedMemory"/>
/// </summary>
private static SafeLocalAllocHandle CopyOidsToUnmanagedMemory(OidCollection oids)
{
SafeLocalAllocHandle safeLocalAllocHandle = SafeLocalAllocHandle.InvalidHandle;
if (oids == null || oids.Count == 0)
{
return(safeLocalAllocHandle);
}
// Copy the oid strings to a local list to prevent a security race condition where
// the OidCollection or individual oids can be modified by another thread and
// potentially cause a buffer overflow
List <string> oidStrs = oids.Cast <Oid>().Select(oid => oid.Value).ToList();
IntPtr pOid = IntPtr.Zero;
// Needs to be checked to avoid having large sets of oids overflow the sizes and allow
// a potential buffer overflow
checked
{
int ptrSize = oidStrs.Count * Marshal.SizeOf(typeof(IntPtr));
int oidSize = oidStrs.Sum(oidStr => oidStr.Length + 1);
safeLocalAllocHandle = NativeMethods.LocalAlloc(NativeMethods.LPTR, new IntPtr((uint)ptrSize + (uint)oidSize));
pOid = new IntPtr((long)safeLocalAllocHandle.DangerousGetHandle() + ptrSize);
}
for (int index = 0; index < oidStrs.Count; index++)
{
Marshal.WriteIntPtr(new IntPtr((long)safeLocalAllocHandle.DangerousGetHandle() + index * Marshal.SizeOf(typeof(IntPtr))), pOid);
byte[] ansiOid = Encoding.ASCII.GetBytes(oidStrs[index]);
Marshal.Copy(ansiOid, 0, pOid, ansiOid.Length);
pOid = new IntPtr((long)pOid + oidStrs[index].Length + 1);
}
return(safeLocalAllocHandle);
}
public static Boolean Contains2(this OidCollection collection, Oid value)
{
return(collection.Cast <Oid>().Any(x => x.Value == value.Value));
}
