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56 lines
2.0 KiB
Plaintext
56 lines
2.0 KiB
Plaintext
// Copyright (c) 2016 Ryan Prichard
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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#ifndef WINPTY_GEN_RANDOM_H
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#define WINPTY_GEN_RANDOM_H
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// The original MinGW requires that we include wincrypt.h. With MinGW-w64 and
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// MSVC, including windows.h is sufficient.
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#include <windows.h>
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#include <wincrypt.h>
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#include <string>
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#include "OsModule.h"
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class GenRandom {
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typedef BOOLEAN WINAPI RtlGenRandom_t(PVOID, ULONG);
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OsModule m_advapi32;
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RtlGenRandom_t *m_rtlGenRandom = nullptr;
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bool m_cryptProvIsValid = false;
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HCRYPTPROV m_cryptProv = 0;
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public:
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GenRandom();
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~GenRandom();
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bool fillBuffer(void *buffer, size_t size);
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std::string randomBytes(size_t numBytes);
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std::wstring randomHexString(size_t numBytes);
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std::wstring uniqueName();
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// Return true if the crypto context was successfully initialized.
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bool valid() const {
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return m_rtlGenRandom != nullptr || m_cryptProvIsValid;
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}
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};
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#endif // WINPTY_GEN_RANDOM_H
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