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# Copyright (C) 2016-present the asyncpg authors and contributors
# <see AUTHORS file>
#
# This module is part of asyncpg and is released under
# the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
cdef class SCRAMAuthentication:
cdef:
readonly bytes authentication_method
readonly bytes authorization_message
readonly bytes client_channel_binding
readonly bytes client_first_message_bare
readonly bytes client_nonce
readonly bytes client_proof
readonly bytes password_salt
readonly int password_iterations
readonly bytes server_first_message
# server_key is an instance of hmac.HAMC
readonly object server_key
readonly bytes server_nonce
cdef create_client_first_message(self, str username)
cdef create_client_final_message(self, str password)
cdef parse_server_first_message(self, bytes server_response)
cdef verify_server_final_message(self, bytes server_final_message)
cdef _bytes_xor(self, bytes a, bytes b)
cdef _generate_client_nonce(self, int num_bytes)
cdef _generate_client_proof(self, str password)
cdef _generate_salted_password(self, str password, bytes salt, int iterations)
cdef _normalize_password(self, str original_password)
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