/// <summary>
/// Starts an explicit encryption context.
/// </summary>
/// <param name="key">The key id.</param>
/// <param name="encryptionAlgorithm">The encryption algorithm.</param>
/// <param name="message">The BSON message.</param>
/// <returns>A encryption context. </returns>
public CryptContext StartExplicitEncryptionContextWithKeyId(byte[] keyId, EncryptionAlgorithm encryptionAlgorithm, byte[] message)
{
ContextSafeHandle handle = Library.mongocrypt_ctx_new(_handle);
unsafe
{
fixed(byte *p = keyId)
{
IntPtr ptr = (IntPtr)p;
using (PinnedBinary pinned = new PinnedBinary(ptr, (uint)keyId.Length))
{
handle.Check(_status, Library.mongocrypt_ctx_setopt_key_id(handle, pinned.Handle));
}
}
}
handle.Check(_status, Library.mongocrypt_ctx_setopt_algorithm(handle, Helpers.EncryptionAlgorithmToString(encryptionAlgorithm), -1));
unsafe
{
fixed(byte *p = message)
{
IntPtr ptr = (IntPtr)p;
using (PinnedBinary pinned = new PinnedBinary(ptr, (uint)message.Length))
{
handle.Check(_status, Library.mongocrypt_ctx_explicit_encrypt_init(handle, pinned.Handle));
}
}
}
return(new CryptContext(handle));
}