/// <summary>
/// Get the HashAlgorithmName from the given ALG_ID
/// </summary>
private static HashAlgorithmName?GetHashAlgorithmName(Interop.BCrypt.ECC_CURVE_ALG_ID_ENUM hashId)
{
Interop.Crypt32.CRYPT_OID_INFO oid = Interop.Crypt32.FindAlgIdOidInfo((int)hashId);
if (oid.AlgId == -1)
{
// The original hash algorithm may not be found and is optional
return(null);
}
return(new HashAlgorithmName(oid.Name));
}
public static unsafe CRYPT_OID_INFO FindAlgIdOidInfo(Interop.BCrypt.ECC_CURVE_ALG_ID_ENUM algId)
{
CRYPT_OID_INFO *fullOidInfo = CryptFindOIDInfo(
CryptOidInfoKeyType.CRYPT_OID_INFO_ALGID_KEY,
&algId,
OidGroup.HashAlgorithm);
if (fullOidInfo != null)
{
return(*fullOidInfo);
}
// Otherwise the lookup failed.
return(new CRYPT_OID_INFO()
{
AlgId = -1
});
}
public static CRYPT_OID_INFO FindAlgIdOidInfo(Interop.BCrypt.ECC_CURVE_ALG_ID_ENUM algId)
{
int intAlgId = (int)algId;
IntPtr fullOidInfo = CryptFindOIDInfo(
CryptOidInfoKeyType.CRYPT_OID_INFO_ALGID_KEY,
ref intAlgId,
OidGroup.HashAlgorithm);
if (fullOidInfo != IntPtr.Zero)
{
return(Marshal.PtrToStructure <CRYPT_OID_INFO>(fullOidInfo));
}
// Otherwise the lookup failed.
return(new CRYPT_OID_INFO()
{
AlgId = -1
});
}
