private void Reset()
{
this.platformKey?.Dispose();
this.platformKey = null;
this.platformAlgorithm?.Dispose();
this.platformAlgorithm = null;
}
public static extern NTSTATUS BCryptOpenAlgorithmProvider(
out SafeAlgorithmHandle phAlgorithm,
string pszAlgId,
string pszImplementation,
BCryptOpenAlgorithmProviderFlags dwFlags);
public static extern NTSTATUS BCryptGenRandom(
SafeAlgorithmHandle hAlgorithm,
byte[] pbBuffer,
int cbBuffer,
BCryptGenRandomFlags flags = BCryptGenRandomFlags.None);
public static extern NTSTATUS BCryptGenerateSymmetricKey(
SafeAlgorithmHandle hAlgorithm,
out SafeKeyHandle phKey,
byte[] pbKeyObject,
int cbKeyObject,
byte[] pbSecret,
int cbSecret,
BCryptGenerateSymmetricKeyFlags flags = BCryptGenerateSymmetricKeyFlags.None);
public static extern NTSTATUS BCryptImportKeyPair(
SafeAlgorithmHandle hAlgorithm,
SafeKeyHandle hImportKey,
[MarshalAs(UnmanagedType.LPWStr)] string pszBlobType,
out SafeKeyHandle phKey,
byte[] pbInput,
int cbInput,
BCryptImportKeyPairFlags dwFlags);
public static extern NTSTATUS BCryptCreateHash(
SafeAlgorithmHandle hAlgorithm,
out SafeHashHandle phHash,
byte[] pbHashObject,
int cbHashObject,
byte[] pbSecret,
int cbSecret,
BCryptCreateHashFlags dwFlags);
public static extern NTSTATUS BCryptGenerateKeyPair(
SafeAlgorithmHandle hAlgorithm,
out SafeKeyHandle phKey,
int dwLength,
BCryptGenerateKeyPairFlags dwFlags = BCryptGenerateKeyPairFlags.None);
/// <summary>
/// Gets the minimum length of a key (in bits).
/// </summary>
/// <param name="algorithm">The algorithm.</param>
/// <returns>The length of the smallest key, in bits.</returns>
private static int GetMinimumKeySize(SafeAlgorithmHandle algorithm)
{
var keyLengths = BCryptGetProperty<BCRYPT_KEY_LENGTHS_STRUCT>(algorithm, PropertyNames.BCRYPT_KEY_LENGTHS);
return keyLengths.MinLength;
}
/// <summary>
/// Creates an empty public/private key pair.
/// </summary>
/// <param name="algorithm">The handle to the algorithm previously opened by <see cref="BCryptOpenAlgorithmProvider"/></param>
/// <param name="keyLength">The length of the key, in bits.</param>
/// <returns>A handle to the generated key pair.</returns>
/// <remarks>
/// After you create a key by using this function, you can use the BCryptSetProperty
/// function to set its properties; however, the key cannot be used until the
/// BCryptFinalizeKeyPair function is called.
/// </remarks>
public static SafeKeyHandle BCryptGenerateKeyPair(
SafeAlgorithmHandle algorithm,
int keyLength)
{
SafeKeyHandle result;
var error = BCryptGenerateKeyPair(algorithm, out result, keyLength, 0);
error.ThrowOnError();
return result;
}
public static SafeKeyHandle BCryptImportKeyPair(
SafeAlgorithmHandle algorithm,
string blobType,
byte[] input,
BCryptImportKeyPairFlags flags)
{
SafeKeyHandle result;
var error = BCryptImportKeyPair(
algorithm,
SafeKeyHandle.NullHandle,
blobType,
out result,
input,
input.Length,
flags);
error.ThrowOnError();
return result;
}
public static extern NTStatus BCryptImportKey(
SafeAlgorithmHandle hAlgorithm,
SafeKeyHandle hImportKey,
[MarshalAs(UnmanagedType.LPWStr)] string pszBlobType,
out SafeKeyHandle phKey,
byte[] pbKeyObject,
int cbKeyObject,
byte[] pbInput,
int cbInput,
BCryptImportKeyFlags dwFlags = BCryptImportKeyFlags.None);
private static extern NTSTATUS BCryptImportKey(SafeAlgorithmHandle hAlgorithm, IntPtr hImportKey, string pszBlobType, out SafeKeyHandle hKey, IntPtr pbKeyObject, int cbKeyObject, byte[] pbInput, int cbInput, int dwFlags);