Framework for glueing BIO layer and Win32 compiler run-time. Goal is to

#define APPLINK_STDIN	1

#define APPLINK_STDOUT	2

#define APPLINK_STDERR	3

#define APPLINK_FPRINTF	4

#define APPLINK_FGETS	5

#define APPLINK_FREAD	6

#define APPLINK_FWRITE	7

#define APPLINK_FSETMOD	8

#define APPLINK_FEOF	9

#define APPLINK_FCLOSE 	10	/* should not be used */

#define APPLINK_MAX	10	/* always same as last macro */

#ifndef APPMACROS_ONLY

#include <stdio.h>

#include <io.h>

#include <fcntl.h>

static void *app_stdin()	{ return stdin;  }

static void *app_stdout()	{ return stdout; }

static void *app_stderr()	{ return stderr; }

static int   app_feof(FILE *fp)	{ return feof(fp); }

static int   app_fsetmod(FILE *fp,char mod)

{ return _setmode (_fileno(fp),mod=='b'?_O_BINARY:_O_TEXT); }

__declspec(dllexport) void **OPENSSL_Applink()

{ static int once=1;

  static void *OPENSSL_ApplinkTable[APPLINK_MAX+1]={(void *)APPLINK_MAX};

    if (once)

    {	OPENSSL_ApplinkTable[APPLINK_STDIN]	= app_stdin;

	OPENSSL_ApplinkTable[APPLINK_STDOUT]	= app_stdout;

	OPENSSL_ApplinkTable[APPLINK_STDERR]	= app_stderr;

	OPENSSL_ApplinkTable[APPLINK_FPRINTF]	= fprintf;

	OPENSSL_ApplinkTable[APPLINK_FGETS]	= fgets;

	OPENSSL_ApplinkTable[APPLINK_FREAD]	= fread;

	OPENSSL_ApplinkTable[APPLINK_FWRITE]	= fwrite;

	OPENSSL_ApplinkTable[APPLINK_FSETMOD]	= app_fsetmod;

	OPENSSL_ApplinkTable[APPLINK_FEOF]	= app_feof;

	OPENSSL_ApplinkTable[APPLINK_FCLOSE]	= fclose;

	once = 0;

    }

  return OPENSSL_ApplinkTable;

}

#endif

#if defined(_WIN64) && !defined(UNICODE)

#define UNICODE

#endif

#if defined(UNICODE) && !defined(_UNICODE)

#define _UNICODE

#endif

#if defined(_UNICODE) && !defined(UNICODE)

#define UNICODE

#endif

#if defined(_MSC_VER) && !defined(_WIN32_WINNT)

#define _WIN32_WINNT 0x0333	/* 3.51 */

#endif

#include <windows.h>

#include <tchar.h>

#include <stdio.h>

#include <malloc.h>

#include "uplink.h"

#ifdef _MSC_VER

#pragma comment(lib,"delayimp")

/*

 * CL command line should also be complemented with following:

 *

 *	/link /delayload:advapi32.dll /delayload:user32.dll

 *

 * This is required if/as we want to support Win9x. With delayloaded

 * DLLs in question all we have to do is to make sure NT-specific

 * functions are not actually called under Win9x.

 */

#endif

#if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333

int IsService()

{ HWINSTA h;

  DWORD len;

  WCHAR *name;

    GetDesktopWindow(); /* return value is ignored */

    h = GetProcessWindowStation();

    if (h==NULL) return -1;

    if (GetUserObjectInformationW (h,UOI_NAME,NULL,0,&len) ||

	GetLastError() != ERROR_INSUFFICIENT_BUFFER)

	return -1;

    if (len>512) return -1;		/* paranoia */

    len++,len&=~1;			/* paranoia */

#ifdef _MSC_VER

    name=(WCHAR *)_alloca(len+sizeof(WCHAR));

#else

    name=(WCHAR *)alloca(len+sizeof(WCHAR));

#endif

    if (!GetUserObjectInformationW (h,UOI_NAME,name,len,&len))

	return -1;

    len++,len&=~1;			/* paranoia */

    name[len/sizeof(WCHAR)]=L'\0';	/* paranoia */

#if 1

    /* This doesn't cover "interactive" services [working with real

     * WinSta0's] nor programs started non-interactively by Task

     * Scheduler [those are working with SAWinSta]. */

    if (wcsstr(name,L"Service-0x"))	return 1;

#else

    /* This covers all non-interactive programs such as services. */

    if (!wcsstr(name,L"WinSta0"))	return 1;

#endif

    else				return 0;

}

#endif

static TCHAR msg[128];

static void unimplemented ()

{

#if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333

    /* this -------------v--- guards NT-specific calls */

    if (GetVersion() < 0x80000000 && IsService())

    {	HANDLE h = RegisterEventSource(0,_T("OPENSSL"));

	TCHAR *pmsg=msg;

	ReportEvent(h,EVENTLOG_ERROR_TYPE,0,0,0,1,0,&pmsg,0);

	DeregisterEventSource(h);

    }

    else

#endif

    {	MSGBOXPARAMS         m;

	m.cbSize             = sizeof(m);

	m.hwndOwner          = NULL;

	m.lpszCaption        = _T("OpenSSL: FATAL");

	m.dwStyle            = MB_OK;

	m.hInstance          = NULL;

	m.lpszIcon           = IDI_ERROR;

	m.dwContextHelpId    = 0;

	m.lpfnMsgBoxCallback = NULL;

	m.dwLanguageId       = MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US);

	m.lpszText           = msg;

	MessageBoxIndirect (&m);

    }

    ExitProcess (1);

}

void OPENSSL_Uplink (void **table, int index)

{ static HMODULE app=NULL;

  static void **applinktable=NULL;

  int len;

    len = _stprintf (msg,_T("OPENSSL_Uplink(%p,%02X): "),table,index);

    _tcscpy (msg+len,_T("unimplemented function"));

    table [index] = unimplemented;

    if (app==NULL && (app=GetModuleHandle(NULL))==NULL)

    {	app=(HMODULE)-1; _tcscpy (msg+len,_T("no host application"));

	return;

    }

    else if (app==(HMODULE)-1)	{ return; }

    if (applinktable==NULL)

    { void**(*applink)();

	applink=(void**(*)())GetProcAddress(app,"OPENSSL_Applink");

	if (applink==NULL)

	{   app=(HMODULE)-1; _tcscpy (msg+len,_T("no OPENSSL_Applink"));

	    return;

	}

	applinktable = (*applink)();

	if (applinktable==NULL)

	{   app=(HMODULE)-1; _tcscpy (msg+len,_T("no ApplinkTable"));

	    return;

	}

    }

    if (index > (int)applinktable[0])	{ return; }

    if (applinktable[index]) table[index] = applinktable[index];

}    

#if defined(_MSC_VER) && defined(_M_IX86)

#define LAZY(i)		\

__declspec(naked) static void lazy##i () { 	\

	_asm	push i				\

	_asm	push OFFSET OPENSSL_UplinkTable	\

	_asm	call OPENSSL_Uplink		\

	_asm	add  esp,8			\

	_asm	jmp  OPENSSL_UplinkTable+4*i	}

#if APPLINK_MAX>20

#error "Add more stubs..."

#endif

/* make some in advance... */

LAZY(1)  LAZY(2)  LAZY(3)  LAZY(4)  LAZY(5)

LAZY(6)  LAZY(7)  LAZY(8)  LAZY(9)  LAZY(10)

LAZY(11) LAZY(12) LAZY(13) LAZY(14) LAZY(15)

LAZY(16) LAZY(17) LAZY(18) LAZY(19) LAZY(20)

void *OPENSSL_UplinkTable[] = {

	(void *)APPLINK_MAX,

	lazy1, lazy2, lazy3, lazy4, lazy5,

	lazy6, lazy7, lazy8, lazy9, lazy10,

	lazy11,lazy12,lazy13,lazy14,lazy15,

	lazy16,lazy17,lazy18,lazy19,lazy20,

};

#endif

#ifdef SELFTEST

main() {  UP_fprintf(UP_stdout,"hello, world!\n"); }

#endif

#define APPMACROS_ONLY

#include "applink.c"

extern void *OPENSSL_UplinkTable[];

#define UP_stdin  (*(void *(*)())OPENSSL_UplinkTable[APPLINK_STDIN])()

#define UP_stdout (*(void *(*)())OPENSSL_UplinkTable[APPLINK_STDOUT])()

#define UP_stderr (*(void *(*)())OPENSSL_UplinkTable[APPLINK_STDERR])()

#define UP_fprintf (*(int (*)(void *,const char *,...))OPENSSL_UplinkTable[APPLINK_FPRINTF])

#define UP_fgets  (*(char *(*)(char *,int,void *))OPENSSL_UplinkTable[APPLINK_FGETS])

#define UP_fread  (*(size_t (*)(void *,size_t,size_t,void *))OPENSSL_UplinkTable[APPLINK_FREAD])

#define UP_fwrite (*(size_t (*)(void *,size_t,size_t,void *))OPENSSL_UplinkTable[APPLINK_FWRITE])

#define UP_fsetmod (*(int (*)(void *,char))OPENSSL_UplinkTable[APPLINK_FSETMOD])

#define UP_feof   (*(int (*)(void *))OPENSSL_UplinkTable[APPLINK_FEOF])

#define UP_fclose (*(int (*)(void *))OPENSSL_Uplink[APPLINK_FCLOSE])

#!/usr/bin/env perl

#

# For Microsoft CL this is implemented as inline assembler. So that

# even though this script can generate even Win32 code, we'll be

# using it primarily to generate Win64 modules. Both IA-64 and AMD64

# are supported...

# pull APPLINK_MAX value from applink.c...

$applink_c=$0;

$applink_c=~s|[^/\\]+$||g;

$applink_c.="applink.c";

open(INPUT,$applink_c) || die "can't open $applink_c: $!";

@max=grep {/APPLINK_MAX\s+(\d+)/} <INPUT>;

close(INPUT);

($#max==0) or die "can't find APPLINK_MAX in $applink_c";

$max[0]=~/APPLINK_MAX\s+(\d+)/;

$N=$1;	# number of entries in OPENSSL_UplinkTable not including

	# OPENSSL_UplinkTable[0], which contains this value...

# Idea is to fill the OPENSSL_UplinkTable with pointers to stubs

# which invoke 'void OPENSSL_Uplink (ULONG_PTR *table,int index)';

# and then dereference themselves. Latter shall result in endless

# loop *unless* OPENSSL_Uplink does not replace 'table[index]' with

# something else, e.g. as 'table[index]=unimplemented;'...

$arg = shift;

#( defined shift || open STDOUT,">$arg" ) || die "can't open $arg: $!";

if ($arg =~ /win32n/)	{ ia32nasm();  }

elsif ($arg =~ /win32/)	{ ia32masm();  }

elsif ($arg =~ /ia64/)	{ ia64ias();   }

elsif ($arg =~ /amd64/)	{ amd64masm(); }

else	{ die "nonsense $arg"; }

sub ia32masm() {

print <<___;

.386P

.model	FLAT

_DATA	SEGMENT

PUBLIC	_OPENSSL_UplinkTable

_OPENSSL_UplinkTable	DD	$N	; amount of following entries

___

for ($i=1;$i<=$N;$i++) {   print "	DD	FLAT:\$lazy$i\n";   }

print <<___;

_DATA	ENDS

_TEXT	SEGMENT

EXTRN	_OPENSSL_Uplink:NEAR

___

for ($i=1;$i<=$N;$i++) {

print <<___;

ALIGN	4

\$lazy$i	PROC NEAR

	push	$i

	push	OFFSET FLAT:_OPENSSL_UplinkTable

	call	_OPENSSL_Uplink

	add	esp,8

	jmp	DWORD PTR _OPENSSL_UplinkTable+4*$i

\$lazy$i	ENDP

___

}

print <<___;

ALIGN	4

_TEXT	ENDS

END

___

}

sub ia32nasm() {

print <<___;

SEGMENT	.data

GLOBAL	_OPENSSL_UplinkTable

_OPENSSL_UplinkTable	DD	$N	; amount of following entries

___

for ($i=1;$i<=$N;$i++) {   print "	DD	\$lazy$i\n";   }

print <<___;

SEGMENT	.text

EXTERN	_OPENSSL_Uplink

___

for ($i=1;$i<=$N;$i++) {

print <<___;

ALIGN	4

\$lazy$i:

	push	$i

	push	_OPENSSL_UplinkTable

	call	_OPENSSL_Uplink

	add	esp,8

	jmp	[_OPENSSL_UplinkTable+4*$i]

___

}

print <<___;

ALIGN	4

END

___

}

sub ia64ias () {

local $V=8;	# max number of args uplink functions may accept...

print <<___;

.data

.global	OPENSSL_UplinkTable#

OPENSSL_UplinkTable:	data8	$N	// amount of following entries

___

for ($i=1;$i<=$N;$i++) {   print "	data8	\@fptr(lazy$i#)\n";   }

print <<___;

.size	OPENSSL_UplinkTable,.-OPENSSL_UplinkTable#

.text

.global	OPENSSL_Uplink#

.type	OPENSSL_Uplink#,\@function

___

for ($i=1;$i<=$N;$i++) {

print <<___;

.proc	lazy$i

lazy$i:

{ .mii;	alloc	loc0=ar.pfs,$V,3,2,0

	mov	loc1=b0

	addl	loc2=\@ltoff(OPENSSL_UplinkTable#),gp	};;

{ .mmi;	ld8	out0=[loc2]

	mov	out1=$i					};;

{ .mib;	adds	loc2=8*$i,out0

	br.call.sptk.many	b0=OPENSSL_Uplink#	};;

{ .mmi;	ld8	r31=[loc2];;

	ld8	r30=[r31],8				};;

{ .mii;	ld8	gp=[r31]

	mov	b6=r30

	mov	b0=loc1					};;

{ .mib; mov	ar.pfs=loc0

	br.many	b6					};;

.endp	lazy$i#

___

}

}

sub amd64masm() {

print <<___;

_DATA	SEGMENT

PUBLIC	OPENSSL_UplinkTable

OPENSSL_UplinkTable	DQ	$N

___

for ($i=1;$i<=$N;$i++) {   print "	DQ	FLAT:\$lazy$i\n";   }

print <<___;

_DATA	ENDS

TEXT	SEGMENT

EXTERN	OPENSSL_Uplink:NEAR

___

for ($i=1;$i<=$N;$i++) {

print <<___;

ALIGN	4

\$lazy$i	PROC NEAR

	push	r9

	push	r8

	push	rdx

	push	rcx

	sub	rsp,40

	mov	rcx,OFFSET FLAT:OPENSSL_UplinkTable

	mov	rdx,$i

	call	OPENSSL_Uplink

	add	rsp,40

	pop	rcx

	pop	rdx

	pop	r8

	pop	r9

	jmp	QWORD PTR OPENSSL_UplinkTable+8*$i

\$lazy$i	ENDP

___

}

print <<___;

TEXT	ENDS

END

___

}