text: /*
   * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include "dso_local.h"
  
  #ifdef OPENSSL_SYS_VMS
  
  # pragma message disable DOLLARID
  # include <errno.h>
  # include <rms.h>
  # include <lib$routines.h>
  # include <libfisdef.h>
  # include <stsdef.h>
  # include <descrip.h>
  # include <starlet.h>
  # include "../vms_rms.h"
  
  /* 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 */
  
  # pragma message disable DOLLARID
  
  static int vms_load(DSO *dso);
  static int vms_unload(DSO *dso);
  static DSO_FUNC_TYPE vms_bind_func(DSO *dso, const char *symname);
  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_func,
      NULL,                       /* ctrl */
      vms_name_converter,
      vms_merger,
      NULL,                       /* init */
      NULL,                       /* finish */
      NULL,                       /* pathbyaddr */
      NULL                        /* globallookup */
  };
  
  /*
   * 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_openssl(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 */
      const char *ext = NULL;     /* possible extension to add */
  
      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 there is a period and the next character is a semi-colon,
       * we need to add an extension
       */
      if (sp2 != NULL && sp2[1] == ';')
          ext = ".EXE";
      /*
       * 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, ';');
          ext = ".EXE";
      }
      /*
       * 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(*p));
      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';
      if (ext) {
          strcat(p->imagename, ext);
          if (*sp2 == '.')
              sp2++;
      }
      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! */
      OPENSSL_free(p);
      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);
  }
  
  # ifndef LIB$M_FIS_MIXEDCASE
  #  define LIB$M_FIS_MIXEDCASE (1 << 4);
  # endif
  void vms_bind_sym(DSO *dso, const char *symname, void **sym)
  {
      DSO_VMS_INTERNAL *ptr;
      int status = 0;
      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;
      }
  
      status = do_find_symbol(ptr, &symname_dsc, sym, LIB$M_FIS_MIXEDCASE);
  
      if (!$VMS_STATUS_SUCCESS(status))
          status = do_find_symbol(ptr, &symname_dsc, sym, 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;
  
          *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 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 == NULL)
          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);
      if (not_translated != NULL)
          strcpy(not_translated, filename);
      return not_translated;
  }
  
  #endif                          /* OPENSSL_SYS_VMS */
  