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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include "stdafx.h"
#include <stdlib.h>
#include "utilcode.h"
#include "strongname.h"
#include "assemblyfilehash.h"
#include "ex.h"
#include "corperm.h"
#include <wincrypt.h>
HRESULT AssemblyFileHash::ReadData()
{
CONTRACTL
{
INSTANCE_CHECK;
NOTHROW;
GC_NOTRIGGER;
INJECT_FAULT(return E_OUTOFMEMORY;);
#ifdef MODE_PREEMPTIVE
MODE_PREEMPTIVE;
#endif
}
CONTRACTL_END;
NewArrayHolder<BYTE> pBuffer;
DWORD dwFileSize = SafeGetFileSize( m_hFile, NULL );
if (dwFileSize == 0xffffffff)
return HRESULT_FROM_GetLastError();
pBuffer = new (nothrow)BYTE[dwFileSize];
if(pBuffer==NULL)
return E_OUTOFMEMORY;
DWORD cbBuffer = dwFileSize;
DWORD cbRead;
if (!ReadFile( m_hFile, pBuffer, cbBuffer, &cbRead, NULL ) ||
cbRead != cbBuffer)
return HRESULT_FROM_GetLastError();
pBuffer.SuppressRelease();
this->m_pbData = pBuffer;
this->m_cbData = cbBuffer;
this->m_bDataOwner = TRUE;
this->m_NeedToReadData=FALSE;
return S_OK;
}
HRESULT AssemblyFileHash::SetFileName(LPCWSTR wszFileName)
{
CONTRACTL
{
INSTANCE_CHECK;
NOTHROW;
GC_NOTRIGGER;
INJECT_FAULT(return E_OUTOFMEMORY;);
#ifdef MODE_PREEMPTIVE
MODE_PREEMPTIVE;
#endif
}
CONTRACTL_END;
HRESULT hr = S_OK;
HandleHolder hFile;
hFile = WszCreateFile(wszFileName,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
0,
NULL);
if (hFile == INVALID_HANDLE_VALUE)
return HRESULT_FROM_GetLastError();
IfFailRet(SetFileHandle(hFile));
hFile.SuppressRelease();
return S_OK;
}
HRESULT AssemblyFileHash::HashData(HCRYPTHASH hHash)
{
WRAPPER_NO_CONTRACT;
if(!CryptHashData(hHash, m_pbData, m_cbData, 0))
return HRESULT_FROM_GetLastError();
return S_OK;
}
HRESULT AssemblyFileHash::CalculateHash(DWORD algid)
{
CONTRACTL
{
INSTANCE_CHECK;
NOTHROW;
INJECT_FAULT(return E_OUTOFMEMORY;);
}
CONTRACTL_END;
HRESULT hr = S_OK;
if(m_NeedToReadData)
IfFailRet(ReadData());
_ASSERTE(!m_NeedToReadData);
HCRYPTPROV pProvider = NULL;
HCRYPTHASH hHash = NULL;
DWORD count;
if(!WszCryptAcquireContext(&pProvider,
NULL,
NULL,
//PROV_RSA_SIG,
PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT))
IfFailGo(HRESULT_FROM_GetLastError());
if(!CryptCreateHash(pProvider,
algid,
0,
0,
&hHash))
IfFailGo(HRESULT_FROM_GetLastError());
IfFailGo(HashData(hHash));
count = sizeof(m_cbHash);
if(!CryptGetHashParam(hHash,
HP_HASHSIZE,
(PBYTE) &m_cbHash,
&count,
0))
IfFailGo(HRESULT_FROM_GetLastError());
if(m_cbHash > 0) {
m_pbHash = new (nothrow) BYTE[m_cbHash];
if (!m_pbHash)
IfFailGo(E_OUTOFMEMORY);
if(!CryptGetHashParam(hHash,
HP_HASHVAL,
m_pbHash,
&m_cbHash,
0))
IfFailGo(HRESULT_FROM_GetLastError());
}
ErrExit:
if(hHash)
CryptDestroyHash(hHash);
if(pProvider)
CryptReleaseContext(pProvider, 0);
return hr;
}
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