windows-xp/Source/XPSP1/NT/ds/security/services/ca/certcli/crypt.cpp

//+--------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1996 - 1999
//
// File:        crypt.cpp
//
// Contents:    Cert Server wrapper routines
//
// History:     17-Oct-96       vich created
//
//---------------------------------------------------------------------------

#include <pch.cpp>

#pragma hdrstop


HRESULT
myCryptStringToBinaryA(
    IN     LPCSTR    pszString,
    IN     DWORD     cchString,
    IN     DWORD     dwFlags,
    OUT    BYTE    **ppbBinary,
    OUT    DWORD    *pcbBinary,
    OUT    DWORD    *pdwSkip,    // OPTIONAL
    OUT    DWORD    *pdwFlags)   // OPTIONAL
{
    HRESULT hr;
    BYTE *pb = NULL;
    DWORD cb;

    while (TRUE)
    {
	if (!CryptStringToBinaryA(
			pszString,
			cchString,
			dwFlags,
			pb,
			&cb,
			pdwSkip,
			pdwFlags))
	{
	    hr = myHLastError();
	    _JumpError2(
		    hr,
		    error,
		    "CryptStringToBinaryA",
		    HRESULT_FROM_WIN32(ERROR_INVALID_DATA));
	}
	if (NULL != pb)
	{
	    break;	// done
	}
	pb = (BYTE *) LocalAlloc(LMEM_FIXED, cb);
	if (NULL == pb)
	{
	    hr = E_OUTOFMEMORY;
	    _JumpError(hr, error, "LocalAlloc");
	}
    }
    *pcbBinary = cb;
    *ppbBinary = pb;
    pb = NULL;
    hr = S_OK;

error:
    if (NULL != pb)
    {
	LocalFree(pb);
    }
    return(hr);
}


HRESULT
myCryptStringToBinary(
    IN     LPCWSTR   pwszString,
    IN     DWORD     cwcString,
    IN     DWORD     dwFlags,
    OUT    BYTE    **ppbBinary,
    OUT    DWORD    *pcbBinary,
    OUT    DWORD    *pdwSkip,    // OPTIONAL
    OUT    DWORD    *pdwFlags)   // OPTIONAL
{
    HRESULT hr;
    BYTE *pb = NULL;
    DWORD cb;

    while (TRUE)
    {
	if (!CryptStringToBinaryW(
			pwszString,
			cwcString,
			dwFlags,
			pb,
			&cb,
			pdwSkip,
			pdwFlags))
	{
	    hr = myHLastError();
	    _JumpError(hr, error, "CryptStringToBinaryW");
	}
	if (NULL != pb)
	{
	    break;	// done
	}
	pb = (BYTE *) LocalAlloc(LMEM_FIXED, cb);
	if (NULL == pb)
	{
	    hr = E_OUTOFMEMORY;
	    _JumpError(hr, error, "LocalAlloc");
	}
    }
    *pcbBinary = cb;
    *ppbBinary = pb;
    pb = NULL;
    hr = S_OK;

error:
    if (NULL != pb)
    {
	LocalFree(pb);
    }
    return(hr);
}


HRESULT
myCryptBinaryToStringA(
    IN     CONST BYTE  *pbBinary,
    IN     DWORD        cbBinary,
    IN     DWORD        dwFlags,
    OUT    LPSTR       *ppszString)
{
    HRESULT hr;
    char *psz = NULL;
    DWORD cch;

    while (TRUE)
    {
	if (!CryptBinaryToStringA(pbBinary, cbBinary, dwFlags, psz, &cch))
	{
	    hr = myHLastError();
	    _JumpError(hr, error, "CryptBinaryToStringA");
	}
	if (NULL != psz)
	{
	    break;	// done
	}
	psz = (char *) LocalAlloc(LMEM_FIXED, cch * sizeof(char));
	if (NULL == psz)
	{
	    hr = E_OUTOFMEMORY;
	    _JumpError(hr, error, "LocalAlloc");
	}
    }
    *ppszString = psz;
    psz = NULL;
    hr = S_OK;

error:
    if (NULL != psz)
    {
	LocalFree(psz);
    }
    return(hr);
}


HRESULT
myCryptBinaryToString(
    IN     CONST BYTE  *pbBinary,
    IN     DWORD        cbBinary,
    IN     DWORD        dwFlags,
    OUT    LPWSTR      *ppwszString)
{
    HRESULT hr;
    WCHAR *pwsz = NULL;
    DWORD cwc;
    DWORD cwc0;

    while (TRUE)
    {
	if (!CryptBinaryToStringW(pbBinary, cbBinary, dwFlags, pwsz, &cwc))
	{
	    hr = myHLastError();
	    _JumpError(hr, error, "CryptBinaryToStringW");
	}
	if (NULL != pwsz)
	{
	    break;	// done
	}
        cwc0 = cwc;
	pwsz = (WCHAR *) LocalAlloc(LMEM_FIXED, cwc * sizeof(WCHAR));
	if (NULL == pwsz)
	{
	    hr = E_OUTOFMEMORY;
	    _JumpError(hr, error, "LocalAlloc");
	}
    }

    CSASSERT(cwc0 == cwc + 1);
    CSASSERT(L'\0' == pwsz[cwc]);

    *ppwszString = pwsz;
    pwsz = NULL;
    hr = S_OK;

error:
    if (NULL != pwsz)
    {
	LocalFree(pwsz);
    }
    return(hr);
}