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1# Copyright (c) 2023, exiledkingcc
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met:
7#
8# * Redistributions of source code must retain the above copyright notice,
9# this list of conditions and the following disclaimer.
10# * Redistributions in binary form must reproduce the above copyright notice,
11# this list of conditions and the following disclaimer in the documentation
12# and/or other materials provided with the distribution.
13# * The name of the author may not be used to endorse or promote products
14# derived from this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26# POSSIBILITY OF SUCH DAMAGE.
28from pypdf._crypt_providers._base import CryptBase, CryptIdentity
30try:
31 from pypdf._crypt_providers._cryptography import (
32 CryptAES,
33 CryptRC4,
34 aes_cbc_decrypt,
35 aes_cbc_encrypt,
36 aes_ecb_decrypt,
37 aes_ecb_encrypt,
38 crypt_provider,
39 rc4_decrypt,
40 rc4_encrypt,
41 )
42except ImportError:
43 try:
44 from pypdf._crypt_providers._pycryptodome import ( # type: ignore
45 CryptAES,
46 CryptRC4,
47 aes_cbc_decrypt,
48 aes_cbc_encrypt,
49 aes_ecb_decrypt,
50 aes_ecb_encrypt,
51 crypt_provider,
52 rc4_decrypt,
53 rc4_encrypt,
54 )
55 except ImportError:
56 from pypdf._crypt_providers._fallback import ( # type: ignore
57 CryptAES,
58 CryptRC4,
59 aes_cbc_decrypt,
60 aes_cbc_encrypt,
61 aes_ecb_decrypt,
62 aes_ecb_encrypt,
63 crypt_provider,
64 rc4_decrypt,
65 rc4_encrypt,
66 )
68__all__ = [
69 "CryptAES",
70 "CryptBase",
71 "CryptIdentity",
72 "CryptRC4",
73 "aes_cbc_decrypt",
74 "aes_cbc_encrypt",
75 "aes_ecb_decrypt",
76 "aes_ecb_encrypt",
77 "crypt_provider",
78 "rc4_decrypt",
79 "rc4_encrypt",
80]