lib/libgss/oid_ops.c

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * lib/gssapi/generic/oid_ops.c
 *
 * Copyright 1995 by the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 */

/*
 * oid_ops.c - GSS-API V2 interfaces to manipulate OIDs
 */

#include <mechglueP.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>

/*
 * this oid is defined in the oid structure but not exported to
 * external callers; we must still ensure that we do not delete it.
 */
extern const gss_OID_desc * const gss_nt_service_name;


OM_uint32
generic_gss_release_oid(minor_status, oid)
OM_uint32   *minor_status;
gss_OID *oid;
{
    if (minor_status)
        *minor_status = 0;

    if (oid == NULL || *oid == GSS_C_NO_OID)
        return (GSS_S_COMPLETE);

    /*
     * The V2 API says the following!
     *
     * gss_release_oid[()] will recognize any of the GSSAPI's own OID
     * values, and will silently ignore attempts to free these OIDs;
     * for other OIDs it will call the C free() routine for both the OID
     * data and the descriptor.  This allows applications to freely mix
     * their own heap allocated OID values with OIDs returned by GSS-API.
     */

    /*
     * We use the official OID definitions instead of the unofficial OID
     * defintions. But we continue to support the unofficial OID
     * gss_nt_service_name just in case if some gss applications use
     * the old OID.
     */

    if ((*oid != GSS_C_NT_USER_NAME) &&
        (*oid != GSS_C_NT_MACHINE_UID_NAME) &&
        (*oid != GSS_C_NT_STRING_UID_NAME) &&
        (*oid != GSS_C_NT_HOSTBASED_SERVICE) &&
        (*oid != GSS_C_NT_ANONYMOUS) &&
        (*oid != GSS_C_NT_EXPORT_NAME) &&
        (*oid != gss_nt_service_name)) {
        free((*oid)->elements);
        free(*oid);
    }
    *oid = GSS_C_NO_OID;
    return (GSS_S_COMPLETE);
}

OM_uint32
generic_gss_copy_oid(minor_status, oid, new_oid)
    OM_uint32   *minor_status;
    const gss_OID   oid;
    gss_OID     *new_oid;
{
    gss_OID p;

    if (minor_status)
        *minor_status = 0;

    if (new_oid == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    if (oid == GSS_C_NO_OID)
        return (GSS_S_CALL_INACCESSIBLE_READ);

    p = (gss_OID) malloc(sizeof (gss_OID_desc));
    if (!p) {
        return (GSS_S_FAILURE);
    }
    p->length = oid->length;
    p->elements = malloc(p->length);
    if (!p->elements) {
        free(p);
        return (GSS_S_FAILURE);
    }
    (void) memcpy(p->elements, oid->elements, p->length);
    *new_oid = p;
    return (GSS_S_COMPLETE);
}


OM_uint32
generic_gss_create_empty_oid_set(minor_status, oid_set)
OM_uint32 *minor_status;
gss_OID_set *oid_set;
{
    if (minor_status)
        *minor_status = 0;

    if (oid_set == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    if ((*oid_set = (gss_OID_set) malloc(sizeof (gss_OID_set_desc)))) {
        (void) memset(*oid_set, 0, sizeof (gss_OID_set_desc));
        return (GSS_S_COMPLETE);
    } else {
        return (GSS_S_FAILURE);
    }
}

OM_uint32
generic_gss_add_oid_set_member(minor_status, member_oid, oid_set)
OM_uint32 *minor_status;
const gss_OID member_oid;
gss_OID_set *oid_set;
{
    gss_OID elist;
    gss_OID lastel;

    if (minor_status)
        *minor_status = 0;

    if (member_oid == GSS_C_NO_OID || member_oid->length == 0 ||
        member_oid->elements == NULL)
        return (GSS_S_CALL_INACCESSIBLE_READ);

    if (oid_set == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    elist = (*oid_set)->elements;
    /* Get an enlarged copy of the array */
    if (((*oid_set)->elements = (gss_OID) malloc(((*oid_set)->count+1) *
                    sizeof (gss_OID_desc)))) {
        /* Copy in the old junk */
        if (elist)
            (void) memcpy((*oid_set)->elements, elist,
                ((*oid_set)->count * sizeof (gss_OID_desc)));

        /* Duplicate the input element */
        lastel = &(*oid_set)->elements[(*oid_set)->count];
        if ((lastel->elements =
            (void *) malloc(member_oid->length))) {

            /* Success - copy elements */
            (void) memcpy(lastel->elements, member_oid->elements,
                    member_oid->length);
            /* Set length */
            lastel->length = member_oid->length;

            /* Update count */
            (*oid_set)->count++;
            if (elist)
                free(elist);
            return (GSS_S_COMPLETE);
        } else
            free((*oid_set)->elements);
    }
    /* Failure - restore old contents of list */
    (*oid_set)->elements = elist;
    return (GSS_S_FAILURE);
}

OM_uint32
generic_gss_test_oid_set_member(minor_status, member, set, present)
    OM_uint32       *minor_status;
    const gss_OID   member;
    const gss_OID_set   set;
    int         *present;
{
    OM_uint32 i;
    int result;

    if (minor_status)
        *minor_status = 0;

    if (member == GSS_C_NO_OID || set == NULL)
        return (GSS_S_CALL_INACCESSIBLE_READ);

    if (present == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    result = 0;
    for (i = 0; i < set->count; i++) {
        if ((set->elements[i].length == member->length) &&
            !memcmp(set->elements[i].elements,
                member->elements, member->length)) {
            result = 1;
            break;
        }
    }
    *present = result;
    return (GSS_S_COMPLETE);
}

/*
 * OID<->string routines.  These are uuuuugly.
 */
OM_uint32
generic_gss_oid_to_str(minor_status, oid, oid_str)
OM_uint32 *minor_status;
const gss_OID oid;
gss_buffer_t oid_str;
{
    char numstr[128];
    OM_uint32 number;
    int numshift;
    OM_uint32 string_length;
    OM_uint32 i;
    unsigned char *cp;
    char *bp;

    if (minor_status != NULL)
        *minor_status = 0;

    if (oid_str != GSS_C_NO_BUFFER) {
        oid_str->length = 0;
        oid_str->value = NULL;
    }

    if (oid == GSS_C_NO_OID || oid->length == 0 || oid->elements == NULL)
        return (GSS_S_CALL_INACCESSIBLE_READ);

    if (oid_str == GSS_C_NO_BUFFER)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    /* First determine the size of the string */
    string_length = 0;
    number = 0;
    numshift = 0;
    cp = (unsigned char *) oid->elements;
    number = (OM_uint32) cp[0];
    (void) sprintf(numstr, "%d ", number/40);
    string_length += strlen(numstr);
    (void) sprintf(numstr, "%d ", number%40);
    string_length += strlen(numstr);
    for (i = 1; i < oid->length; i++) {
        if ((OM_uint32) (numshift+7) < (sizeof (OM_uint32)*8)) {
            number = (number << 7) | (cp[i] & 0x7f);
            numshift += 7;
        } else {
            return (GSS_S_FAILURE);
        }

        if ((cp[i] & 0x80) == 0) {
            (void) sprintf(numstr, "%d ", number);
            string_length += strlen(numstr);
            number = 0;
            numshift = 0;
        }
    }
    /*
     * If we get here, we've calculated the length of "n n n ... n ".  Add 4
     * here for "{ " and "}\0".
     */
    string_length += 4;
    if ((bp = (char *)malloc(string_length))) {
        (void) strcpy(bp, "{ ");
        number = (OM_uint32) cp[0];
        (void) sprintf(numstr, "%d ", number/40);
        (void) strcat(bp, numstr);
        (void) sprintf(numstr, "%d ", number%40);
        (void) strcat(bp, numstr);
        number = 0;
        cp = (unsigned char *) oid->elements;
        for (i = 1; i < oid->length; i++) {
            number = (number << 7) | (cp[i] & 0x7f);
            if ((cp[i] & 0x80) == 0) {
                (void) sprintf(numstr, "%d ", number);
                (void) strcat(bp, numstr);
                number = 0;
            }
        }
        (void) strcat(bp, "}");
        oid_str->length = strlen(bp)+1;
        oid_str->value = (void *) bp;
        return (GSS_S_COMPLETE);
    }
    return (GSS_S_FAILURE);
}

/*
 * This routine will handle 2 types of oid string formats:
 *  1 - { 1 2 3 4 }  where the braces are optional
 *  2 - 1.2.3.4 this is an alernative format
 * The first format is mandated by the gss spec.  The
 * second format is popular outside of the gss community so
 * has been added.
 */
OM_uint32
generic_gss_str_to_oid(minor_status, oid_str, oid)
OM_uint32 *minor_status;
const gss_buffer_t oid_str;
gss_OID *oid;
{
    char *cp, *bp, *startp;
    int brace;
    int numbuf;
    int onumbuf;
    OM_uint32 nbytes;
    int index;
    unsigned char *op;

    if (minor_status != NULL)
        *minor_status = 0;

    if (oid != NULL)
        *oid = GSS_C_NO_OID;

    if (GSS_EMPTY_BUFFER(oid_str))
        return (GSS_S_CALL_INACCESSIBLE_READ);

    if (oid == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    brace = 0;
    bp = (char *)oid_str->value;
    cp = bp;
    /* Skip over leading space */
    while ((bp < &cp[oid_str->length]) && isspace(*bp))
        bp++;
    if (*bp == '{') {
        brace = 1;
        bp++;
    }
    while ((bp < &cp[oid_str->length]) && isspace(*bp))
        bp++;
    startp = bp;
    nbytes = 0;

    /*
     * The first two numbers are chewed up by the first octet.
     */
    if (sscanf(bp, "%d", &numbuf) != 1) {
        return (GSS_S_FAILURE);
    }
    while ((bp < &cp[oid_str->length]) && isdigit(*bp))
        bp++;
    while ((bp < &cp[oid_str->length]) &&
        (isspace(*bp) || *bp == '.'))
        bp++;
    if (sscanf(bp, "%d", &numbuf) != 1) {
        return (GSS_S_FAILURE);
    }
    while ((bp < &cp[oid_str->length]) && isdigit(*bp))
        bp++;
    while ((bp < &cp[oid_str->length]) &&
        (isspace(*bp) || *bp == '.'))
        bp++;
    nbytes++;
    while (isdigit(*bp)) {
        if (sscanf(bp, "%d", &numbuf) != 1) {
            return (GSS_S_FAILURE);
        }
        while (numbuf) {
            nbytes++;
            numbuf >>= 7;
        }
        while ((bp < &cp[oid_str->length]) && isdigit(*bp))
            bp++;
        while ((bp < &cp[oid_str->length]) &&
            (isspace(*bp) || *bp == '.'))
            bp++;
    }
    if (brace && (*bp != '}')) {
        return (GSS_S_FAILURE);
    }

    /*
     * Phew!  We've come this far, so the syntax is good.
     */
    if ((*oid = (gss_OID) malloc(sizeof (gss_OID_desc)))) {
        if (((*oid)->elements = (void *) malloc(nbytes))) {
            (*oid)->length = nbytes;
            op = (unsigned char *) (*oid)->elements;
            bp = startp;
            (void) sscanf(bp, "%d", &numbuf);
            while (isdigit(*bp))
                bp++;
            while (isspace(*bp) || *bp == '.')
                bp++;
            onumbuf = 40*numbuf;
            (void) sscanf(bp, "%d", &numbuf);
            onumbuf += numbuf;
            *op = (unsigned char) onumbuf;
            op++;
            while (isdigit(*bp))
                bp++;
            while (isspace(*bp) || *bp == '.')
                bp++;
            while (isdigit(*bp)) {
                (void) sscanf(bp, "%d", &numbuf);
                nbytes = 0;
        /* Have to fill in the bytes msb-first */
                onumbuf = numbuf;
                while (numbuf) {
                    nbytes++;
                    numbuf >>= 7;
                }
                numbuf = onumbuf;
                op += nbytes;
                index = -1;
                while (numbuf) {
                    op[index] = (unsigned char)
                            numbuf & 0x7f;
                    if (index != -1)
                        op[index] |= 0x80;
                    index--;
                    numbuf >>= 7;
                }
                while (isdigit(*bp))
                    bp++;
                while (isspace(*bp) || *bp == '.')
                    bp++;
            }
            return (GSS_S_COMPLETE);
        } else {
            free(*oid);
            *oid = GSS_C_NO_OID;
        }
    }
    return (GSS_S_FAILURE);
}

/*
 * Copyright 1993 by OpenVision Technologies, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appears in all copies and
 * that both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of OpenVision not be used
 * in advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission. OpenVision makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */
OM_uint32
gss_copy_oid_set(
    OM_uint32 *minor_status,
    const gss_OID_set_desc * const oidset,
    gss_OID_set *new_oidset
)
{
    gss_OID_set_desc *copy;
    OM_uint32 minor = 0;
    OM_uint32 major = GSS_S_COMPLETE;
    OM_uint32 index;

    if (minor_status != NULL)
        *minor_status = 0;

    if (new_oidset != NULL)
        *new_oidset = GSS_C_NO_OID_SET;

    if (oidset == GSS_C_NO_OID_SET)
        return (GSS_S_CALL_INACCESSIBLE_READ);

    if (new_oidset == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    if ((copy = (gss_OID_set_desc *) calloc(1, sizeof (*copy))) == NULL) {
        major = GSS_S_FAILURE;
        goto done;
    }

    if ((copy->elements = (gss_OID_desc *)
        calloc(oidset->count, sizeof (*copy->elements))) == NULL) {
        major = GSS_S_FAILURE;
        goto done;
    }
    copy->count = oidset->count;

    for (index = 0; index < copy->count; index++) {
        gss_OID_desc *out = &copy->elements[index];
        gss_OID_desc *in = &oidset->elements[index];

        if ((out->elements = (void *) malloc(in->length)) == NULL) {
            major = GSS_S_FAILURE;
            goto done;
        }
        (void) memcpy(out->elements, in->elements, in->length);
        out->length = in->length;
    }

    *new_oidset = copy;
done:
    if (major != GSS_S_COMPLETE) {
        (void) gss_release_oid_set(&minor, &copy);
    }

    return (major);
}