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# Copyright (c) 2023, exiledkingcc
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from pypdf._crypt_providers._base import CryptBase, CryptIdentity
try:
from pypdf._crypt_providers._cryptography import (
CryptAES,
CryptRC4,
aes_cbc_decrypt,
aes_cbc_encrypt,
aes_ecb_decrypt,
aes_ecb_encrypt,
crypt_provider,
rc4_decrypt,
rc4_encrypt,
)
from pypdf._utils import Version
if Version(crypt_provider[1]) <= Version("3.0"):
# This is due to the backend parameter being required back then:
# https://cryptography.io/en/latest/changelog/#v3-1
raise ImportError("cryptography<=3.0 is not supported") # pragma: no cover
except ImportError:
try:
from pypdf._crypt_providers._pycryptodome import ( # type: ignore
CryptAES,
CryptRC4,
aes_cbc_decrypt,
aes_cbc_encrypt,
aes_ecb_decrypt,
aes_ecb_encrypt,
crypt_provider,
rc4_decrypt,
rc4_encrypt,
)
except ImportError:
from pypdf._crypt_providers._fallback import ( # type: ignore
CryptAES,
CryptRC4,
aes_cbc_decrypt,
aes_cbc_encrypt,
aes_ecb_decrypt,
aes_ecb_encrypt,
crypt_provider,
rc4_decrypt,
rc4_encrypt,
)
__all__ = [
"crypt_provider",
"CryptBase",
"CryptIdentity",
"CryptRC4",
"CryptAES",
"rc4_encrypt",
"rc4_decrypt",
"aes_ecb_encrypt",
"aes_ecb_decrypt",
"aes_cbc_encrypt",
"aes_cbc_decrypt",
]
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