two version of R2R are here HEAD master

5 files changed, 432 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/__init__.py b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/__init__.py
new file mode 100644
index 00000000..49d41128
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/__init__.py
@@ -0,0 +1,86 @@
+# 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",
+]
diff --git a/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_base.py b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_base.py
new file mode 100644
index 00000000..894025f3
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_base.py
@@ -0,0 +1,38 @@
+# 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.
+
+
+class CryptBase:
+    def encrypt(self, data: bytes) -> bytes:  # pragma: no cover
+        return data
+
+    def decrypt(self, data: bytes) -> bytes:  # pragma: no cover
+        return data
+
+
+class CryptIdentity(CryptBase):
+    pass
diff --git a/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_cryptography.py b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_cryptography.py
new file mode 100644
index 00000000..f5537612
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_cryptography.py
@@ -0,0 +1,118 @@
+# 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.
+
+import secrets
+
+from cryptography import __version__
+from cryptography.hazmat.primitives import padding
+from cryptography.hazmat.primitives.ciphers.algorithms import AES
+
+try:
+    # 43.0.0 - https://cryptography.io/en/latest/changelog/#v43-0-0
+    from cryptography.hazmat.decrepit.ciphers.algorithms import ARC4
+except ImportError:
+    from cryptography.hazmat.primitives.ciphers.algorithms import ARC4
+from cryptography.hazmat.primitives.ciphers.base import Cipher
+from cryptography.hazmat.primitives.ciphers.modes import CBC, ECB
+
+from pypdf._crypt_providers._base import CryptBase
+
+crypt_provider = ("cryptography", __version__)
+
+
+class CryptRC4(CryptBase):
+    def __init__(self, key: bytes) -> None:
+        self.cipher = Cipher(ARC4(key), mode=None)
+
+    def encrypt(self, data: bytes) -> bytes:
+        encryptor = self.cipher.encryptor()
+        return encryptor.update(data) + encryptor.finalize()
+
+    def decrypt(self, data: bytes) -> bytes:
+        decryptor = self.cipher.decryptor()
+        return decryptor.update(data) + decryptor.finalize()
+
+
+class CryptAES(CryptBase):
+    def __init__(self, key: bytes) -> None:
+        self.alg = AES(key)
+
+    def encrypt(self, data: bytes) -> bytes:
+        iv = secrets.token_bytes(16)
+        pad = padding.PKCS7(128).padder()
+        data = pad.update(data) + pad.finalize()
+
+        cipher = Cipher(self.alg, CBC(iv))
+        encryptor = cipher.encryptor()
+        return iv + encryptor.update(data) + encryptor.finalize()
+
+    def decrypt(self, data: bytes) -> bytes:
+        iv = data[:16]
+        data = data[16:]
+        # for empty encrypted data
+        if not data:
+            return data
+
+        # just for robustness, it does not happen under normal circumstances
+        if len(data) % 16 != 0:
+            pad = padding.PKCS7(128).padder()
+            data = pad.update(data) + pad.finalize()
+
+        cipher = Cipher(self.alg, CBC(iv))
+        decryptor = cipher.decryptor()
+        d = decryptor.update(data) + decryptor.finalize()
+        return d[: -d[-1]]
+
+
+def rc4_encrypt(key: bytes, data: bytes) -> bytes:
+    encryptor = Cipher(ARC4(key), mode=None).encryptor()
+    return encryptor.update(data) + encryptor.finalize()
+
+
+def rc4_decrypt(key: bytes, data: bytes) -> bytes:
+    decryptor = Cipher(ARC4(key), mode=None).decryptor()
+    return decryptor.update(data) + decryptor.finalize()
+
+
+def aes_ecb_encrypt(key: bytes, data: bytes) -> bytes:
+    encryptor = Cipher(AES(key), mode=ECB()).encryptor()
+    return encryptor.update(data) + encryptor.finalize()
+
+
+def aes_ecb_decrypt(key: bytes, data: bytes) -> bytes:
+    decryptor = Cipher(AES(key), mode=ECB()).decryptor()
+    return decryptor.update(data) + decryptor.finalize()
+
+
+def aes_cbc_encrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
+    encryptor = Cipher(AES(key), mode=CBC(iv)).encryptor()
+    return encryptor.update(data) + encryptor.finalize()
+
+
+def aes_cbc_decrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
+    decryptor = Cipher(AES(key), mode=CBC(iv)).decryptor()
+    return decryptor.update(data) + decryptor.finalize()
diff --git a/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_fallback.py b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_fallback.py
new file mode 100644
index 00000000..631fec19
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_fallback.py
@@ -0,0 +1,93 @@
+# 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
+from pypdf.errors import DependencyError
+
+_DEPENDENCY_ERROR_STR = "cryptography>=3.1 is required for AES algorithm"
+
+
+crypt_provider = ("local_crypt_fallback", "0.0.0")
+
+
+class CryptRC4(CryptBase):
+    def __init__(self, key: bytes) -> None:
+        self.s = bytearray(range(256))
+        j = 0
+        for i in range(256):
+            j = (j + self.s[i] + key[i % len(key)]) % 256
+            self.s[i], self.s[j] = self.s[j], self.s[i]
+
+    def encrypt(self, data: bytes) -> bytes:
+        s = bytearray(self.s)
+        out = [0 for _ in range(len(data))]
+        i, j = 0, 0
+        for k in range(len(data)):
+            i = (i + 1) % 256
+            j = (j + s[i]) % 256
+            s[i], s[j] = s[j], s[i]
+            x = s[(s[i] + s[j]) % 256]
+            out[k] = data[k] ^ x
+        return bytes(bytearray(out))
+
+    def decrypt(self, data: bytes) -> bytes:
+        return self.encrypt(data)
+
+
+class CryptAES(CryptBase):
+    def __init__(self, key: bytes) -> None:
+        pass
+
+    def encrypt(self, data: bytes) -> bytes:
+        raise DependencyError(_DEPENDENCY_ERROR_STR)
+
+    def decrypt(self, data: bytes) -> bytes:
+        raise DependencyError(_DEPENDENCY_ERROR_STR)
+
+
+def rc4_encrypt(key: bytes, data: bytes) -> bytes:
+    return CryptRC4(key).encrypt(data)
+
+
+def rc4_decrypt(key: bytes, data: bytes) -> bytes:
+    return CryptRC4(key).decrypt(data)
+
+
+def aes_ecb_encrypt(key: bytes, data: bytes) -> bytes:
+    raise DependencyError(_DEPENDENCY_ERROR_STR)
+
+
+def aes_ecb_decrypt(key: bytes, data: bytes) -> bytes:
+    raise DependencyError(_DEPENDENCY_ERROR_STR)
+
+
+def aes_cbc_encrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
+    raise DependencyError(_DEPENDENCY_ERROR_STR)
+
+
+def aes_cbc_decrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
+    raise DependencyError(_DEPENDENCY_ERROR_STR)
diff --git a/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_pycryptodome.py b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_pycryptodome.py
new file mode 100644
index 00000000..30a13e18
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/pypdf/_crypt_providers/_pycryptodome.py
@@ -0,0 +1,97 @@
+# 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.
+
+import secrets
+
+from Crypto import __version__
+from Crypto.Cipher import AES, ARC4
+from Crypto.Util.Padding import pad
+
+from pypdf._crypt_providers._base import CryptBase
+
+crypt_provider = ("pycryptodome", __version__)
+
+
+class CryptRC4(CryptBase):
+    def __init__(self, key: bytes) -> None:
+        self.key = key
+
+    def encrypt(self, data: bytes) -> bytes:
+        return ARC4.ARC4Cipher(self.key).encrypt(data)
+
+    def decrypt(self, data: bytes) -> bytes:
+        return ARC4.ARC4Cipher(self.key).decrypt(data)
+
+
+class CryptAES(CryptBase):
+    def __init__(self, key: bytes) -> None:
+        self.key = key
+
+    def encrypt(self, data: bytes) -> bytes:
+        iv = secrets.token_bytes(16)
+        data = pad(data, 16)
+        aes = AES.new(self.key, AES.MODE_CBC, iv)
+        return iv + aes.encrypt(data)
+
+    def decrypt(self, data: bytes) -> bytes:
+        iv = data[:16]
+        data = data[16:]
+        # for empty encrypted data
+        if not data:
+            return data
+
+        # just for robustness, it does not happen under normal circumstances
+        if len(data) % 16 != 0:
+            data = pad(data, 16)
+
+        aes = AES.new(self.key, AES.MODE_CBC, iv)
+        d = aes.decrypt(data)
+        return d[: -d[-1]]
+
+
+def rc4_encrypt(key: bytes, data: bytes) -> bytes:
+    return ARC4.ARC4Cipher(key).encrypt(data)
+
+
+def rc4_decrypt(key: bytes, data: bytes) -> bytes:
+    return ARC4.ARC4Cipher(key).decrypt(data)
+
+
+def aes_ecb_encrypt(key: bytes, data: bytes) -> bytes:
+    return AES.new(key, AES.MODE_ECB).encrypt(data)
+
+
+def aes_ecb_decrypt(key: bytes, data: bytes) -> bytes:
+    return AES.new(key, AES.MODE_ECB).decrypt(data)
+
+
+def aes_cbc_encrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
+    return AES.new(key, AES.MODE_CBC, iv).encrypt(data)
+
+
+def aes_cbc_decrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
+    return AES.new(key, AES.MODE_CBC, iv).decrypt(data)