2019-11-04 01:36:53 +00:00
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// Copyright (c) 2005-2019 Jay Berkenbilt
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//
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// This file is part of qpdf.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms
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// of version 2.0 of the Artistic License. At your option, you may
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// continue to consider qpdf to be licensed under those terms. Please
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// see the manual for additional information.
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#ifndef QPDFCRYPTOIMPL_HH
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#define QPDFCRYPTOIMPL_HH
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#include <qpdf/DLL.h>
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2019-11-04 02:22:03 +00:00
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#include <cstring>
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2019-11-04 01:36:53 +00:00
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// This class is part of qpdf's pluggable crypto provider support.
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// Most users won't need to know or care about this class, but you can
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// use it if you want to supply your own crypto implementation. To do
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// so, provide an implementation of QPDFCryptoImpl, ensure that you
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// register it by calling QPDFCryptoProvider::registerImpl, and make
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// it the default by calling QPDFCryptoProvider::setDefaultProvider.
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class QPDF_DLL_CLASS QPDFCryptoImpl
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{
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public:
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QPDF_DLL
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QPDFCryptoImpl() = default;
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QPDF_DLL
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virtual ~QPDFCryptoImpl() = default;
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2019-11-04 02:22:03 +00:00
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typedef unsigned char MD5_Digest[16];
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QPDF_DLL
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virtual void MD5_init() = 0;
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QPDF_DLL
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virtual void MD5_update(unsigned char const* data, size_t len) = 0;
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QPDF_DLL
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virtual void MD5_finalize() = 0;
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QPDF_DLL
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virtual void MD5_digest(MD5_Digest) = 0;
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2019-11-04 14:04:25 +00:00
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// key_len of -1 means treat key_data as a null-terminated string
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QPDF_DLL
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virtual void RC4_init(unsigned char const* key_data, int key_len = -1) = 0;
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// out_data = 0 means to encrypt/decrypt in place
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QPDF_DLL
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virtual void RC4_process(unsigned char* in_data, size_t len,
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unsigned char* out_data = 0) = 0;
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QPDF_DLL
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virtual void RC4_finalize() = 0;
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2019-11-04 01:36:53 +00:00
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};
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#endif // QPDFCRYPTOIMPL_HH
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