dispatcher.h File Reference

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Functions
SECURITY_STATUS	fork_helper (PNegoHelper *new_helper, const char *prog, char *const argv[]) DECLSPEC_HIDDEN
SECURITY_STATUS	run_helper (PNegoHelper helper, char *buffer, unsigned int max_buflen, int *buflen) DECLSPEC_HIDDEN
void	cleanup_helper (PNegoHelper helper) DECLSPEC_HIDDEN
void	check_version (PNegoHelper helper) DECLSPEC_HIDDEN

Function Documentation

check_version()

void check_version

(

PNegoHelper

helper

)

Definition at line 408 of file dispatcher.c.

{
    char temp[80];
    char *newline;
    int major = 0, minor = 0, micro = 0, ret;

    TRACE("Checking version of helper\n");
    if(helper != NULL)
    {
        int len = read(helper->pipe_in, temp, sizeof(temp)-1);
        if (len > 8)
        {
            if((newline = memchr(temp, '\n', len)) != NULL)
                *newline = '\0';
            else
                temp[len] = 0;

            TRACE("Exact version is %s\n", debugstr_a(temp));
            ret = sscanf(temp, "Version %d.%d.%d", &major, &minor, &micro);
            if(ret != 3)
            {
                ERR("Failed to get the helper version.\n");
                helper->major = helper->minor = helper->micro = -1;
            }
            else
            {
                TRACE("Version recognized: %d.%d.%d\n", major, minor, micro);
                helper->major = major;
                helper->minor = minor;
                helper->micro = micro;
            }
        }
    }
}

cleanup_helper()

void cleanup_helper

(

PNegoHelper

helper

)

Definition at line 377 of file dispatcher.c.

{

    TRACE("Killing helper %p\n", helper);
    if(helper == NULL)
        return;

    HeapFree(GetProcessHeap(), 0, helper->com_buf);
    HeapFree(GetProcessHeap(), 0, helper->session_key);

    /* closing stdin will terminate ntlm_auth */
    close(helper->pipe_out);
    close(helper->pipe_in);

#ifndef __REACTOS__

#ifdef HAVE_FORK
    if (helper->helper_pid > 0) /* reap child */
    {
        pid_t wret;
        do {
            wret = waitpid(helper->helper_pid, NULL, 0);
        } while (wret < 0 && errno == EINTR);
    }
#endif

#endif

    HeapFree(GetProcessHeap(), 0, helper);
}

Referenced by ntlm_AcceptSecurityContext(), ntlm_DeleteSecurityContext(), ntlm_InitializeSecurityContextW(), and SECUR32_initNTLMSP().

fork_helper()

SECURITY_STATUS fork_helper	(	PNegoHelper *	new_helper,
		const char *	prog,
		char *const	argv[]
	)

Definition at line 76 of file dispatcher.c.

{
    int pipe_in[2];
    int pipe_out[2];
#ifdef __REACTOS__
    HANDLE hPipe;
    PROCESS_INFORMATION pi;
    STARTUPINFOA si;
    char* cmdline;
#endif
    int i;
    PNegoHelper helper;

    TRACE("%s ", debugstr_a(prog));
    for(i = 0; argv[i] != NULL; ++i)
    {
        TRACE("%s ", debugstr_a(argv[i]));
    }
    TRACE("\n");

#ifndef __REACTOS__

#ifdef HAVE_PIPE2
    if (pipe2( pipe_in, O_CLOEXEC ) < 0 )
#endif
    {
        if( pipe(pipe_in) < 0 ) return SEC_E_INTERNAL_ERROR;
        fcntl( pipe_in[0], F_SETFD, FD_CLOEXEC );
        fcntl( pipe_in[1], F_SETFD, FD_CLOEXEC );
    }
#ifdef HAVE_PIPE2
    if (pipe2( pipe_out, O_CLOEXEC ) < 0 )
#endif
    {
        if( pipe(pipe_out) < 0 )
        {
            close(pipe_in[0]);
            close(pipe_in[1]);
            return SEC_E_INTERNAL_ERROR;
        }
        fcntl( pipe_out[0], F_SETFD, FD_CLOEXEC );
        fcntl( pipe_out[1], F_SETFD, FD_CLOEXEC );
    }

#else

    if (_pipe(pipe_in, 0, _O_BINARY /* _O_TEXT */ | _O_NOINHERIT) < 0)
    {
        return SEC_E_INTERNAL_ERROR;
    }

    if (_pipe(pipe_out, 0, _O_BINARY /* _O_TEXT */ | _O_NOINHERIT) < 0)
    {
        close(pipe_in[0]);
        close(pipe_in[1]);
        return SEC_E_INTERNAL_ERROR;
    }

#endif

    if (!(helper = HeapAlloc(GetProcessHeap(),0, sizeof(NegoHelper))))
    {
        close(pipe_in[0]);
        close(pipe_in[1]);
        close(pipe_out[0]);
        close(pipe_out[1]);
        return SEC_E_INSUFFICIENT_MEMORY;
    }

#ifndef __REACTOS__
    helper->helper_pid = fork();
#else

    cmdline = flatten_cmdline(prog, argv);
    if (!cmdline)
    {
        close(pipe_in[0]);
        close(pipe_in[1]);
        close(pipe_out[0]);
        close(pipe_out[1]);
        HeapFree( GetProcessHeap(), 0, helper );
        return SEC_E_INSUFFICIENT_MEMORY;
    }

    ZeroMemory(&pi, sizeof(pi));
    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);

    si.dwFlags |= STARTF_USESTDHANDLES;

    /* The reading side of the pipe is STDIN for this process */
    hPipe = (HANDLE)_get_osfhandle(pipe_out[0]);
    SetHandleInformation(hPipe, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT);
    si.hStdInput = hPipe;

    /* The writing side of the pipe is STDOUT for this process */
    hPipe = (HANDLE)_get_osfhandle(pipe_in[1]);
    SetHandleInformation(hPipe, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT);
    si.hStdOutput = hPipe;
    si.hStdError  = hPipe;

    if (!CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi))
    {
        /* We fail just afterwards */
        helper->helper_pid = (HANDLE)-1;
    }
    else
    {
        helper->helper_pid = pi.hProcess;
        CloseHandle(pi.hThread);
        CloseHandle(pi.hProcess);
    }

    HeapFree( GetProcessHeap(), 0, cmdline );

#endif

#ifndef __REACTOS__
    if(helper->helper_pid == -1)
#else
    if(helper->helper_pid == (HANDLE)-1)
#endif
    {
        close(pipe_in[0]);
        close(pipe_in[1]);
        close(pipe_out[0]);
        close(pipe_out[1]);
        HeapFree( GetProcessHeap(), 0, helper );
        return SEC_E_INTERNAL_ERROR;
    }

#ifndef __REACTOS__
    if(helper->helper_pid == 0)
    {
        /* We're in the child now */
        dup2(pipe_out[0], 0);
        close(pipe_out[0]);
        close(pipe_out[1]);

        dup2(pipe_in[1], 1);
        close(pipe_in[0]);
        close(pipe_in[1]);

        execvp(prog, argv);

        /* Whoops, we shouldn't get here. Big badaboom.*/
        write(STDOUT_FILENO, "BH\n", 3);
        _exit(1);
    }
    else
#endif
    {
        *new_helper = helper;
        helper->major = helper->minor = helper->micro = -1;
        helper->com_buf = NULL;
        helper->com_buf_size = 0;
        helper->com_buf_offset = 0;
        helper->session_key = NULL;
        helper->neg_flags = 0;
        helper->crypt.ntlm.a4i = NULL;
        helper->crypt.ntlm2.send_a4i = NULL;
        helper->crypt.ntlm2.recv_a4i = NULL;
        helper->crypt.ntlm2.send_sign_key = NULL;
        helper->crypt.ntlm2.send_seal_key = NULL;
        helper->crypt.ntlm2.recv_sign_key = NULL;
        helper->crypt.ntlm2.recv_seal_key = NULL;
        helper->pipe_in = pipe_in[0];   // Keep in(read)
        close(pipe_in[1]);              // Close in(write)
        helper->pipe_out = pipe_out[1]; // Keep out(write)
        close(pipe_out[0]);             // Close out(read)
    }

    return SEC_E_OK;
}

Referenced by ntlm_AcceptSecurityContext(), ntlm_InitializeSecurityContextW(), and SECUR32_initNTLMSP().

run_helper()

SECURITY_STATUS run_helper	(	PNegoHelper	helper,
		char *	buffer,
		unsigned int	max_buflen,
		int *	buflen
	)

Definition at line 331 of file dispatcher.c.

{
    int offset_len;
    SECURITY_STATUS sec_status = SEC_E_OK;

    TRACE("In helper: sending %s\n", debugstr_a(buffer));

    /* buffer + '\n' */
    write(helper->pipe_out, buffer, lstrlenA(buffer));
    write(helper->pipe_out, "\n", 1);

    if((sec_status = read_line(helper, &offset_len)) != SEC_E_OK)
    {
        return sec_status;
    }
    
    TRACE("In helper: received %s\n", debugstr_a(helper->com_buf));
    *buflen = lstrlenA(helper->com_buf);

    if( *buflen > max_buflen)
    {   
        ERR("Buffer size too small(%d given, %d required) dropping data!\n",
                max_buflen, *buflen);
        return SEC_E_BUFFER_TOO_SMALL;
    }

    if( *buflen < 2 )
    {
        return SEC_E_ILLEGAL_MESSAGE;
    }

    /* We only get ERR if the input size is too big. On a GENSEC error,
     * ntlm_auth will return BH */
    if(strncmp(helper->com_buf, "ERR", 3) == 0)
    {
        return SEC_E_INVALID_TOKEN;
    }

    memcpy(buffer, helper->com_buf, *buflen+1);

    sec_status = preserve_unused(helper, offset_len);
    
    return sec_status;
}

Referenced by ntlm_AcceptSecurityContext(), and ntlm_InitializeSecurityContextW().