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dso_vms.c

/* dso_vms.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "cryptlib.h"
#include <openssl/dso.h>
#ifdef OPENSSL_SYS_VMS
#pragma message disable DOLLARID
#include <rms.h>
#include <lib$routines.h>
#include <stsdef.h>
#include <descrip.h>
#include <starlet.h>
#include "vms_rms.h"
#endif

/* Some compiler options may mask the declaration of "_malloc32". */
#if __INITIAL_POINTER_SIZE && defined _ANSI_C_SOURCE
# if __INITIAL_POINTER_SIZE == 64
#  pragma pointer_size save
#  pragma pointer_size 32
    void * _malloc32  (__size_t);
#  pragma pointer_size restore
# endif /* __INITIAL_POINTER_SIZE == 64 */
#endif /* __INITIAL_POINTER_SIZE && defined _ANSI_C_SOURCE */


#ifndef OPENSSL_SYS_VMS
DSO_METHOD *DSO_METHOD_vms(void)
      {
      return NULL;
      }
#else
#pragma message disable DOLLARID

static int vms_load(DSO *dso);
static int vms_unload(DSO *dso);
static void *vms_bind_var(DSO *dso, const char *symname);
static DSO_FUNC_TYPE vms_bind_func(DSO *dso, const char *symname);
#if 0
static int vms_unbind_var(DSO *dso, char *symname, void *symptr);
static int vms_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
static int vms_init(DSO *dso);
static int vms_finish(DSO *dso);
static long vms_ctrl(DSO *dso, int cmd, long larg, void *parg);
#endif
static char *vms_name_converter(DSO *dso, const char *filename);
static char *vms_merger(DSO *dso, const char *filespec1,
      const char *filespec2);

static DSO_METHOD dso_meth_vms = {
      "OpenSSL 'VMS' shared library method",
      vms_load,
      NULL, /* unload */
      vms_bind_var,
      vms_bind_func,
/* For now, "unbind" doesn't exist */
#if 0
      NULL, /* unbind_var */
      NULL, /* unbind_func */
#endif
      NULL, /* ctrl */
      vms_name_converter,
      vms_merger,
      NULL, /* init */
      NULL  /* finish */
      };

/* On VMS, the only "handle" is the file name.  LIB$FIND_IMAGE_SYMBOL depends
 * on the reference to the file name being the same for all calls regarding
 * one shared image, so we'll just store it in an instance of the following
 * structure and put a pointer to that instance in the meth_data stack.
 */
typedef struct dso_internal_st
      {
      /* This should contain the name only, no directory,
       * no extension, nothing but a name. */
      struct dsc$descriptor_s filename_dsc;
      char filename[ NAMX_MAXRSS+ 1];
      /* This contains whatever is not in filename, if needed.
       * Normally not defined. */
      struct dsc$descriptor_s imagename_dsc;
      char imagename[ NAMX_MAXRSS+ 1];
      } DSO_VMS_INTERNAL;

DSO_METHOD *DSO_METHOD_vms(void)
      {
      return(&dso_meth_vms);
      }

static int vms_load(DSO *dso)
      {
      void *ptr = NULL;
      /* See applicable comments in dso_dl.c */
      char *filename = DSO_convert_filename(dso, NULL);

/* Ensure 32-bit pointer for "p", and appropriate malloc() function. */
#if __INITIAL_POINTER_SIZE == 64
# define DSO_MALLOC _malloc32
# pragma pointer_size save
# pragma pointer_size 32
#else /* __INITIAL_POINTER_SIZE == 64 */
# define DSO_MALLOC OPENSSL_malloc
#endif /* __INITIAL_POINTER_SIZE == 64 [else] */

      DSO_VMS_INTERNAL *p = NULL;

#if __INITIAL_POINTER_SIZE == 64
# pragma pointer_size restore
#endif /* __INITIAL_POINTER_SIZE == 64 */

      const char *sp1, *sp2;  /* Search result */

      if(filename == NULL)
            {
            DSOerr(DSO_F_VMS_LOAD,DSO_R_NO_FILENAME);
            goto err;
            }

      /* A file specification may look like this:
       *
       *    node::dev:[dir-spec]name.type;ver
       *
       * or (for compatibility with TOPS-20):
       *
       *    node::dev:<dir-spec>name.type;ver
       *
       * and the dir-spec uses '.' as separator.  Also, a dir-spec
       * may consist of several parts, with mixed use of [] and <>:
       *
       *    [dir1.]<dir2>
       *
       * We need to split the file specification into the name and
       * the rest (both before and after the name itself).
       */
      /* Start with trying to find the end of a dir-spec, and save the
         position of the byte after in sp1 */
      sp1 = strrchr(filename, ']');
      sp2 = strrchr(filename, '>');
      if (sp1 == NULL) sp1 = sp2;
      if (sp2 != NULL && sp2 > sp1) sp1 = sp2;
      if (sp1 == NULL) sp1 = strrchr(filename, ':');
      if (sp1 == NULL)
            sp1 = filename;
      else
            sp1++;            /* The byte after the found character */
      /* Now, let's see if there's a type, and save the position in sp2 */
      sp2 = strchr(sp1, '.');
      /* If we found it, that's where we'll cut.  Otherwise, look for a
         version number and save the position in sp2 */
      if (sp2 == NULL) sp2 = strchr(sp1, ';');
      /* If there was still nothing to find, set sp2 to point at the end of
         the string */
      if (sp2 == NULL) sp2 = sp1 + strlen(sp1);

      /* Check that we won't get buffer overflows */
      if (sp2 - sp1 > FILENAME_MAX
            || (sp1 - filename) + strlen(sp2) > FILENAME_MAX)
            {
            DSOerr(DSO_F_VMS_LOAD,DSO_R_FILENAME_TOO_BIG);
            goto err;
            }

      p = DSO_MALLOC(sizeof(DSO_VMS_INTERNAL));
      if(p == NULL)
            {
            DSOerr(DSO_F_VMS_LOAD,ERR_R_MALLOC_FAILURE);
            goto err;
            }

      strncpy(p->filename, sp1, sp2-sp1);
      p->filename[sp2-sp1] = '\0';

      strncpy(p->imagename, filename, sp1-filename);
      p->imagename[sp1-filename] = '\0';
      strcat(p->imagename, sp2);

      p->filename_dsc.dsc$w_length = strlen(p->filename);
      p->filename_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
      p->filename_dsc.dsc$b_class = DSC$K_CLASS_S;
      p->filename_dsc.dsc$a_pointer = p->filename;
      p->imagename_dsc.dsc$w_length = strlen(p->imagename);
      p->imagename_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
      p->imagename_dsc.dsc$b_class = DSC$K_CLASS_S;
      p->imagename_dsc.dsc$a_pointer = p->imagename;

      if(!sk_void_push(dso->meth_data, (char *)p))
            {
            DSOerr(DSO_F_VMS_LOAD,DSO_R_STACK_ERROR);
            goto err;
            }

      /* Success (for now, we lie.  We actually do not know...) */
      dso->loaded_filename = filename;
      return(1);
err:
      /* Cleanup! */
      if(p != NULL)
            OPENSSL_free(p);
      if(filename != NULL)
            OPENSSL_free(filename);
      return(0);
      }

/* Note that this doesn't actually unload the shared image, as there is no
 * such thing in VMS.  Next time it get loaded again, a new copy will
 * actually be loaded.
 */
static int vms_unload(DSO *dso)
      {
      DSO_VMS_INTERNAL *p;
      if(dso == NULL)
            {
            DSOerr(DSO_F_VMS_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
            return(0);
            }
      if(sk_void_num(dso->meth_data) < 1)
            return(1);
      p = (DSO_VMS_INTERNAL *)sk_void_pop(dso->meth_data);
      if(p == NULL)
            {
            DSOerr(DSO_F_VMS_UNLOAD,DSO_R_NULL_HANDLE);
            return(0);
            }
      /* Cleanup */
      OPENSSL_free(p);
      return(1);
      }

/* We must do this in a separate function because of the way the exception
   handler works (it makes this function return */
static int do_find_symbol(DSO_VMS_INTERNAL *ptr,
      struct dsc$descriptor_s *symname_dsc, void **sym,
      unsigned long flags)
      {
      /* Make sure that signals are caught and returned instead of
         aborting the program.  The exception handler gets unestablished
         automatically on return from this function.  */
      lib$establish(lib$sig_to_ret);

      if(ptr->imagename_dsc.dsc$w_length)
            return lib$find_image_symbol(&ptr->filename_dsc,
                  symname_dsc, sym,
                  &ptr->imagename_dsc, flags);
      else
            return lib$find_image_symbol(&ptr->filename_dsc,
                  symname_dsc, sym,
                  0, flags);
      }

void vms_bind_sym(DSO *dso, const char *symname, void **sym)
      {
      DSO_VMS_INTERNAL *ptr;
      int status;
#if 0
      int flags = (1<<4); /* LIB$M_FIS_MIXEDCASE, but this symbol isn't
                               defined in VMS older than 7.0 or so */
#else
      int flags = 0;
#endif
      struct dsc$descriptor_s symname_dsc;

/* Arrange 32-bit pointer to (copied) string storage, if needed. */
#if __INITIAL_POINTER_SIZE == 64
# define SYMNAME symname_32p
# pragma pointer_size save
# pragma pointer_size 32
      char *symname_32p;
# pragma pointer_size restore
      char symname_32[ NAMX_MAXRSS+ 1];
#else /* __INITIAL_POINTER_SIZE == 64 */
# define SYMNAME ((char *) symname)
#endif /* __INITIAL_POINTER_SIZE == 64 [else] */

      *sym = NULL;

      if((dso == NULL) || (symname == NULL))
            {
            DSOerr(DSO_F_VMS_BIND_SYM,ERR_R_PASSED_NULL_PARAMETER);
            return;
            }

#if __INITIAL_POINTER_SIZE == 64
      /* Copy the symbol name to storage with a 32-bit pointer. */
      symname_32p = symname_32;
      strcpy( symname_32p, symname);
#endif /* __INITIAL_POINTER_SIZE == 64 [else] */

      symname_dsc.dsc$w_length = strlen(SYMNAME);
      symname_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
      symname_dsc.dsc$b_class = DSC$K_CLASS_S;
      symname_dsc.dsc$a_pointer = SYMNAME;

      if(sk_void_num(dso->meth_data) < 1)
            {
            DSOerr(DSO_F_VMS_BIND_SYM,DSO_R_STACK_ERROR);
            return;
            }
      ptr = (DSO_VMS_INTERNAL *)sk_void_value(dso->meth_data,
            sk_void_num(dso->meth_data) - 1);
      if(ptr == NULL)
            {
            DSOerr(DSO_F_VMS_BIND_SYM,DSO_R_NULL_HANDLE);
            return;
            }

      if(dso->flags & DSO_FLAG_UPCASE_SYMBOL) flags = 0;

      status = do_find_symbol(ptr, &symname_dsc, sym, flags);

      if(!$VMS_STATUS_SUCCESS(status))
            {
            unsigned short length;
            char errstring[257];
            struct dsc$descriptor_s errstring_dsc;

            errstring_dsc.dsc$w_length = sizeof(errstring);
            errstring_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
            errstring_dsc.dsc$b_class = DSC$K_CLASS_S;
            errstring_dsc.dsc$a_pointer = errstring;

            *sym = NULL;

            status = sys$getmsg(status, &length, &errstring_dsc, 1, 0);

            if (!$VMS_STATUS_SUCCESS(status))
                  lib$signal(status); /* This is really bad.  Abort!  */
            else
                  {
                  errstring[length] = '\0';

                  DSOerr(DSO_F_VMS_BIND_SYM,DSO_R_SYM_FAILURE);
                  if (ptr->imagename_dsc.dsc$w_length)
                        ERR_add_error_data(9,
                              "Symbol ", symname,
                              " in ", ptr->filename,
                              " (", ptr->imagename, ")",
                              ": ", errstring);
                  else
                        ERR_add_error_data(6,
                              "Symbol ", symname,
                              " in ", ptr->filename,
                              ": ", errstring);
                  }
            return;
            }
      return;
      }

static void *vms_bind_var(DSO *dso, const char *symname)
      {
      void *sym = 0;
      vms_bind_sym(dso, symname, &sym);
      return sym;
      }

static DSO_FUNC_TYPE vms_bind_func(DSO *dso, const char *symname)
      {
      DSO_FUNC_TYPE sym = 0;
      vms_bind_sym(dso, symname, (void **)&sym);
      return sym;
      }


static char *vms_merger(DSO *dso, const char *filespec1, const char *filespec2)
      {
      int status;
      int filespec1len, filespec2len;
      struct FAB fab;
      struct NAMX_STRUCT nam;
      char esa[ NAMX_MAXRSS+ 1];
      char *merged;

/* Arrange 32-bit pointer to (copied) string storage, if needed. */
#if __INITIAL_POINTER_SIZE == 64
# define FILESPEC1 filespec1_32p;
# define FILESPEC2 filespec2_32p;
# pragma pointer_size save
# pragma pointer_size 32
      char *filespec1_32p;
      char *filespec2_32p;
# pragma pointer_size restore
      char filespec1_32[ NAMX_MAXRSS+ 1];
      char filespec2_32[ NAMX_MAXRSS+ 1];
#else /* __INITIAL_POINTER_SIZE == 64 */
# define FILESPEC1 ((char *) filespec1)
# define FILESPEC2 ((char *) filespec2)
#endif /* __INITIAL_POINTER_SIZE == 64 [else] */

      if (!filespec1) filespec1 = "";
      if (!filespec2) filespec2 = "";
      filespec1len = strlen(filespec1);
      filespec2len = strlen(filespec2);

#if __INITIAL_POINTER_SIZE == 64
      /* Copy the file names to storage with a 32-bit pointer. */
      filespec1_32p = filespec1_32;
      filespec2_32p = filespec2_32;
      strcpy( filespec1_32p, filespec1);
      strcpy( filespec2_32p, filespec2);
#endif /* __INITIAL_POINTER_SIZE == 64 [else] */

      fab = cc$rms_fab;
      nam = CC_RMS_NAMX;

      FAB_OR_NAML( fab, nam).FAB_OR_NAML_FNA = FILESPEC1;
      FAB_OR_NAML( fab, nam).FAB_OR_NAML_FNS = filespec1len;
      FAB_OR_NAML( fab, nam).FAB_OR_NAML_DNA = FILESPEC2;
      FAB_OR_NAML( fab, nam).FAB_OR_NAML_DNS = filespec2len;
      NAMX_DNA_FNA_SET( fab)

      nam.NAMX_ESA = esa;
      nam.NAMX_ESS = NAMX_MAXRSS;
      nam.NAMX_NOP = NAM$M_SYNCHK | NAM$M_PWD;
      SET_NAMX_NO_SHORT_UPCASE( nam);

      fab.FAB_NAMX = &nam;

      status = sys$parse(&fab, 0, 0);

      if(!$VMS_STATUS_SUCCESS(status))
            {
            unsigned short length;
            char errstring[257];
            struct dsc$descriptor_s errstring_dsc;

            errstring_dsc.dsc$w_length = sizeof(errstring);
            errstring_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
            errstring_dsc.dsc$b_class = DSC$K_CLASS_S;
            errstring_dsc.dsc$a_pointer = errstring;

            status = sys$getmsg(status, &length, &errstring_dsc, 1, 0);

            if (!$VMS_STATUS_SUCCESS(status))
                  lib$signal(status); /* This is really bad.  Abort!  */
            else
                  {
                  errstring[length] = '\0';

                  DSOerr(DSO_F_VMS_MERGER,DSO_R_FAILURE);
                  ERR_add_error_data(7,
                                 "filespec \"", filespec1, "\", ",
                                 "defaults \"", filespec2, "\": ",
                                 errstring);
                  }
            return(NULL);
            }

      merged = OPENSSL_malloc( nam.NAMX_ESL+ 1);
      if(!merged)
            goto malloc_err;
      strncpy( merged, nam.NAMX_ESA, nam.NAMX_ESL);
      merged[ nam.NAMX_ESL] = '\0';
      return(merged);
 malloc_err:
      DSOerr(DSO_F_VMS_MERGER,
            ERR_R_MALLOC_FAILURE);
      }

static char *vms_name_converter(DSO *dso, const char *filename)
      {
        int len = strlen(filename);
        char *not_translated = OPENSSL_malloc(len+1);
        strcpy(not_translated,filename);
      return(not_translated);
      }

#endif /* OPENSSL_SYS_VMS */

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