/*

 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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 */