49 lines
1.6 KiB
Python
49 lines
1.6 KiB
Python
# utils.py
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#
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# Copyright (C) 2006-2026 wolfSSL Inc.
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#
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# This file is part of wolfSSL.
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#
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# wolfSSL is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# wolfSSL is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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# pylint: disable=unused-import
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from __future__ import annotations
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from typing import TypeAlias
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from binascii import hexlify as b2h, unhexlify as h2b # noqa: F401
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BytesOrStr: TypeAlias = bytes | bytearray | memoryview | str
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def t2b(string: BytesOrStr) -> bytes:
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"""
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Converts text to bytes.
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Passes through bytes unchanged.
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Objects of type bytearray or memoryview are converted to bytes.
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Encodes str to UTF-8 bytes.
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:param string: text to convert to bytes.
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:raises TypeError: if string is not one of the supported types.
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"""
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if isinstance(string, bytes):
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return string
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if isinstance(string, (bytearray, memoryview)):
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return bytes(string)
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if isinstance(string, str):
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return str(string).encode("utf-8")
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raise TypeError(f"String parameter of wrong type {type(string).__name__}, expected bytes, bytearray, memoryview or str")
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