token.c 49.7 KB
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/*
 * Tokens
 *
 * Copyright (C) 1998 Alexandre Julliard
 * Copyright (C) 2003 Mike McCormack
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 * Copyright (C) 2005 Robert Shearman
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 */

#include "config.h"

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
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#include <stdarg.h>
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#include "ntstatus.h"
#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "handle.h"
#include "thread.h"
#include "process.h"
#include "request.h"
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#include "security.h"

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#include "wine/unicode.h"

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#define MAX_SUBAUTH_COUNT 1

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const LUID SeIncreaseQuotaPrivilege        = {  5, 0 };
const LUID SeSecurityPrivilege             = {  8, 0 };
const LUID SeTakeOwnershipPrivilege        = {  9, 0 };
const LUID SeLoadDriverPrivilege           = { 10, 0 };
const LUID SeSystemProfilePrivilege        = { 11, 0 };
const LUID SeSystemtimePrivilege           = { 12, 0 };
const LUID SeProfileSingleProcessPrivilege = { 13, 0 };
const LUID SeIncreaseBasePriorityPrivilege = { 14, 0 };
const LUID SeCreatePagefilePrivilege       = { 15, 0 };
const LUID SeBackupPrivilege               = { 17, 0 };
const LUID SeRestorePrivilege              = { 18, 0 };
const LUID SeShutdownPrivilege             = { 19, 0 };
const LUID SeDebugPrivilege                = { 20, 0 };
const LUID SeSystemEnvironmentPrivilege    = { 22, 0 };
const LUID SeChangeNotifyPrivilege         = { 23, 0 };
const LUID SeRemoteShutdownPrivilege       = { 24, 0 };
const LUID SeUndockPrivilege               = { 25, 0 };
const LUID SeManageVolumePrivilege         = { 28, 0 };
const LUID SeImpersonatePrivilege          = { 29, 0 };
const LUID SeCreateGlobalPrivilege         = { 30, 0 };
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static const SID world_sid = { SID_REVISION, 1, { SECURITY_WORLD_SID_AUTHORITY }, { SECURITY_WORLD_RID } };
static const SID local_sid = { SID_REVISION, 1, { SECURITY_LOCAL_SID_AUTHORITY }, { SECURITY_LOCAL_RID } };
static const SID interactive_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_INTERACTIVE_RID } };
static const SID authenticated_user_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_AUTHENTICATED_USER_RID } };
static const SID local_system_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_LOCAL_SYSTEM_RID } };
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static const PSID security_world_sid = (PSID)&world_sid;
static const PSID security_local_sid = (PSID)&local_sid;
const PSID security_interactive_sid = (PSID)&interactive_sid;
static const PSID security_authenticated_user_sid = (PSID)&authenticated_user_sid;
static const PSID security_local_system_sid = (PSID)&local_system_sid;
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static luid_t prev_luid_value = { 1000, 0 };
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struct token
{
    struct object  obj;             /* object header */
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    luid_t         token_id;        /* system-unique id of token */
    luid_t         modified_id;     /* new id allocated every time token is modified */
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    struct list    privileges;      /* privileges available to the token */
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    struct list    groups;          /* groups that the user of this token belongs to (sid_and_attributes) */
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    SID           *user;            /* SID of user this token represents */
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    SID           *primary_group;   /* SID of user's primary group */
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    unsigned       primary;         /* is this a primary or impersonation token? */
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    ACL           *default_dacl;    /* the default DACL to assign to objects created by this user */
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    TOKEN_SOURCE   source;          /* source of the token */
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    SECURITY_IMPERSONATION_LEVEL impersonation_level; /* impersonation level this token is capable of if non-primary token */
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};

struct privilege
{
    struct list entry;
    LUID        luid;
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    unsigned    enabled  : 1; /* is the privilege currently enabled? */
    unsigned    def      : 1; /* is the privilege enabled by default? */
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};

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struct group
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{
    struct list entry;
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    unsigned    enabled  : 1; /* is the sid currently enabled? */
    unsigned    def      : 1; /* is the sid enabled by default? */
    unsigned    logon    : 1; /* is this a logon sid? */
    unsigned    mandatory: 1; /* is this sid always enabled? */
    unsigned    owner    : 1; /* can this sid be an owner of an object? */
    unsigned    resource : 1; /* is this a domain-local group? */
    unsigned    deny_only: 1; /* is this a sid that should be use for denying only? */
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    SID         sid;
};

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static void token_dump( struct object *obj, int verbose );
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static unsigned int token_map_access( struct object *obj, unsigned int access );
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static void token_destroy( struct object *obj );
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static const struct object_ops token_ops =
{
    sizeof(struct token),      /* size */
    token_dump,                /* dump */
    no_add_queue,              /* add_queue */
    NULL,                      /* remove_queue */
    NULL,                      /* signaled */
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    NULL,                      /* satisfied */
    no_signal,                 /* signal */
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    no_get_fd,                 /* get_fd */
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    token_map_access,          /* map_access */
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    no_lookup_name,            /* lookup_name */
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    no_open_file,              /* open_file */
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    no_close_handle,           /* close_handle */
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    token_destroy              /* destroy */
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};


static void token_dump( struct object *obj, int verbose )
{
    fprintf( stderr, "Security token\n" );
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    /* FIXME: dump token members */
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}

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static unsigned int token_map_access( struct object *obj, unsigned int access )
{
    if (access & GENERIC_READ)    access |= TOKEN_READ;
    if (access & GENERIC_WRITE)   access |= TOKEN_WRITE;
    if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
    if (access & GENERIC_ALL)     access |= TOKEN_ALL_ACCESS;
    return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
}

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static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
{
    int i;
    SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
    if (!sid) return NULL;
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    sid->Revision = SID_REVISION;
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    sid->SubAuthorityCount = subauthcount;
    sid->IdentifierAuthority = *idauthority;
    for (i = 0; i < subauthcount; i++)
        sid->SubAuthority[i] = subauth[i];
    return sid;
}

static inline int security_equal_sid( const SID *sid1, const SID *sid2 )
{
    return ((sid1->SubAuthorityCount == sid2->SubAuthorityCount) &&
        !memcmp( sid1, sid2, FIELD_OFFSET(SID, SubAuthority[sid1->SubAuthorityCount]) ));
}

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void security_set_thread_token( struct thread *thread, obj_handle_t handle )
{
    if (!handle)
    {
        if (thread->token)
            release_object( thread->token );
        thread->token = NULL;
    }
    else
    {
        struct token *token = (struct token *)get_handle_obj( current->process,
                                                              handle,
                                                              TOKEN_IMPERSONATE,
                                                              &token_ops );
        if (token)
        {
            if (thread->token)
                release_object( thread->token );
            thread->token = token;
        }
    }
}

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static const ACE_HEADER *ace_next( const ACE_HEADER *ace )
{
    return (const ACE_HEADER *)((const char *)ace + ace->AceSize);
}

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static int acl_is_valid( const ACL *acl, data_size_t size )
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{
    ULONG i;
    const ACE_HEADER *ace;

    if (size < sizeof(ACL))
        return FALSE;

    size = min(size, MAX_ACL_LEN);

    size -= sizeof(ACL);

    ace = (const ACE_HEADER *)(acl + 1);
    for (i = 0; i < acl->AceCount; i++)
    {
        const SID *sid;
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        data_size_t sid_size;
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        if (size < sizeof(ACE_HEADER))
            return FALSE;
        if (size < ace->AceSize)
            return FALSE;
        size -= ace->AceSize;
        switch (ace->AceType)
        {
        case ACCESS_DENIED_ACE_TYPE:
            sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
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            sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
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            break;
        case ACCESS_ALLOWED_ACE_TYPE:
            sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
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            sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
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            break;
        case SYSTEM_AUDIT_ACE_TYPE:
            sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
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            sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
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            break;
        case SYSTEM_ALARM_ACE_TYPE:
            sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
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            sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
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            break;
        default:
            return FALSE;
        }
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        if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
            sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
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            return FALSE;
        ace = ace_next( ace );
    }
    return TRUE;
}

/* gets the discretionary access control list from a security descriptor */
static inline const ACL *sd_get_dacl( const struct security_descriptor *sd, int *present )
{
    *present = (sd->control & SE_DACL_PRESENT ? TRUE : FALSE);

    if (sd->dacl_len)
        return (const ACL *)((const char *)(sd + 1) +
            sd->owner_len + sd->group_len + sd->sacl_len);
    else
        return NULL;
}

/* gets the system access control list from a security descriptor */
static inline const ACL *sd_get_sacl( const struct security_descriptor *sd, int *present )
{
    *present = (sd->control & SE_SACL_PRESENT ? TRUE : FALSE);

    if (sd->sacl_len)
        return (const ACL *)((const char *)(sd + 1) +
            sd->owner_len + sd->group_len);
    else
        return NULL;
}

/* gets the owner from a security descriptor */
static inline const SID *sd_get_owner( const struct security_descriptor *sd )
{
    if (sd->owner_len)
        return (const SID *)(sd + 1);
    else
        return NULL;
}

/* gets the primary group from a security descriptor */
static inline const SID *sd_get_group( const struct security_descriptor *sd )
{
    if (sd->group_len)
        return (const SID *)((const char *)(sd + 1) + sd->owner_len);
    else
        return NULL;
}

/* checks whether all members of a security descriptor fit inside the size
 * of memory specified */
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static int sd_is_valid( const struct security_descriptor *sd, data_size_t size )
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{
    size_t offset = sizeof(struct security_descriptor);
    const SID *group;
    const SID *owner;
    const ACL *sacl;
    const ACL *dacl;
    int dummy;

    if (size < offset)
        return FALSE;

    if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
        (offset + sd->owner_len > size))
        return FALSE;
    owner = sd_get_owner( sd );
    if (owner)
    {
        size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
        if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
            return FALSE;
    }
    offset += sd->owner_len;

    if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
        (offset + sd->group_len > size))
        return FALSE;
    group = sd_get_group( sd );
    if (group)
    {
        size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
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        if ((sd->group_len < sizeof(SID)) || (needed_size > sd->group_len))
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            return FALSE;
    }
    offset += sd->group_len;

    if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
        return FALSE;
    sacl = sd_get_sacl( sd, &dummy );
    if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
        return FALSE;
    offset += sd->sacl_len;

    if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
        return FALSE;
    dacl = sd_get_dacl( sd, &dummy );
    if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
        return FALSE;
    offset += sd->dacl_len;

    return TRUE;
}

/* maps from generic rights to specific rights as given by a mapping */
static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
{
    if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
    if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
    if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
    if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
    *mask &= 0x0FFFFFFF;
}

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static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
{
    return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
}

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static inline void allocate_luid( luid_t *luid )
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{
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    prev_luid_value.low_part++;
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    *luid = prev_luid_value;
}

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DECL_HANDLER( allocate_locally_unique_id )
{
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    allocate_luid( &reply->luid );
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}

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static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
{
    out->Luid = in->luid;
    out->Attributes =
        (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
        (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
}

static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
{
    struct privilege *privilege = mem_alloc( sizeof(*privilege) );
    if (privilege)
    {
        privilege->luid = *luid;
        privilege->def = privilege->enabled = (enabled != 0);
        list_add_tail( &token->privileges, &privilege->entry );
    }
    return privilege;
}

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static inline void privilege_remove( struct privilege *privilege )
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{
    list_remove( &privilege->entry );
    free( privilege );
}

static void token_destroy( struct object *obj )
{
    struct token* token;
    struct list *cursor, *cursor_next;

    assert( obj->ops == &token_ops );
    token = (struct token *)obj;

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    free( token->user );

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    LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
    {
        struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
        privilege_remove( privilege );
    }
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    LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
    {
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        struct group *group = LIST_ENTRY( cursor, struct group, entry );
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        list_remove( &group->entry );
        free( group );
    }
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    free( token->default_dacl );
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}

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/* creates a new token.
 *  groups may be NULL if group_count is 0.
 *  privs may be NULL if priv_count is 0.
 *  default_dacl may be NULL, indicating that all objects created by the user
 *   are unsecured.
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 *  modified_id may be NULL, indicating that a new modified_id luid should be
 *   allocated.
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 */
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static struct token *create_token( unsigned primary, const SID *user,
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                                   const SID_AND_ATTRIBUTES *groups, unsigned int group_count,
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                                   const LUID_AND_ATTRIBUTES *privs, unsigned int priv_count,
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                                   const ACL *default_dacl, TOKEN_SOURCE source,
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                                   const luid_t *modified_id,
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                                   SECURITY_IMPERSONATION_LEVEL impersonation_level )
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{
    struct token *token = alloc_object( &token_ops );
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    if (token)
    {
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        unsigned int i;
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        allocate_luid( &token->token_id );
        if (modified_id)
            token->modified_id = *modified_id;
        else
            allocate_luid( &token->modified_id );
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        list_init( &token->privileges );
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        list_init( &token->groups );
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        token->primary = primary;
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        /* primary tokens don't have impersonation levels */
        if (primary)
            token->impersonation_level = -1;
        else
            token->impersonation_level = impersonation_level;
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        token->default_dacl = NULL;
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        token->primary_group = NULL;
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        /* copy user */
        token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
        if (!token->user)
        {
            release_object( token );
            return NULL;
        }
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        /* copy groups */
        for (i = 0; i < group_count; i++)
        {
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            size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
            struct group *group = mem_alloc( size );
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            if (!group)
            {
                release_object( token );
                return NULL;
            }
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            memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
            group->enabled = TRUE;
            group->def = TRUE;
            group->logon = FALSE;
            group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
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            group->owner = groups[i].Attributes & SE_GROUP_OWNER ? TRUE : FALSE;
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            group->resource = FALSE;
            group->deny_only = FALSE;
            list_add_tail( &token->groups, &group->entry );
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            /* Use first owner capable group as an owner */
            if (!token->primary_group && group->owner)
                token->primary_group = &group->sid;
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        }
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        /* copy privileges */
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        for (i = 0; i < priv_count; i++)
        {
            /* note: we don't check uniqueness: the caller must make sure
             * privs doesn't contain any duplicate luids */
            if (!privilege_add( token, &privs[i].Luid,
                                privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
            {
                release_object( token );
                return NULL;
            }
        }
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        if (default_dacl)
        {
            token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
            if (!token->default_dacl)
            {
                release_object( token );
                return NULL;
            }
        }
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        token->source = source;
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    }
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    return token;
}

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static ACL *create_default_dacl( const SID *user )
{
    ACCESS_ALLOWED_ACE *aaa;
    ACL *default_dacl;
    SID *sid;
    size_t default_dacl_size = sizeof(ACL) +
                               2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
                               sizeof(local_system_sid) +
                               FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);

    default_dacl = mem_alloc( default_dacl_size );
    if (!default_dacl) return NULL;

    default_dacl->AclRevision = MAX_ACL_REVISION;
    default_dacl->Sbz1 = 0;
    default_dacl->AclSize = default_dacl_size;
    default_dacl->AceCount = 2;
    default_dacl->Sbz2 = 0;

    /* GENERIC_ALL for Local System */
    aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
    aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
    aaa->Header.AceFlags = 0;
    aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
                          sizeof(local_system_sid);
    aaa->Mask = GENERIC_ALL;
    sid = (SID *)&aaa->SidStart;
    memcpy( sid, &local_system_sid, sizeof(local_system_sid) );

    /* GENERIC_ALL for specified user */
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    aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
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    aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
    aaa->Header.AceFlags = 0;
    aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
                          FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
    aaa->Mask = GENERIC_ALL;
    sid = (SID *)&aaa->SidStart;
    memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );

    return default_dacl;
}

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struct sid_data
{
    SID_IDENTIFIER_AUTHORITY idauth;
    int count;
    unsigned int subauth[MAX_SUBAUTH_COUNT];
};

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struct token *token_create_admin( void )
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{
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    struct token *token = NULL;
    static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
    static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
    static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
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    /* on Windows, this value changes every time the user logs on */
    static const unsigned int logon_subauth[] = { SECURITY_LOGON_IDS_RID, 0, 1 /* FIXME: should be randomly generated when tokens are inherited by new processes */ };
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    PSID alias_admins_sid;
    PSID alias_users_sid;
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    PSID logon_sid;
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    /* note: should be the owner specified in the token */
    ACL *default_dacl = create_default_dacl( &interactive_sid );
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    alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
                                           alias_admins_subauth );
    alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
                                          alias_users_subauth );
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    logon_sid = security_sid_alloc( &nt_authority, sizeof(logon_subauth)/sizeof(logon_subauth[0]),
                                    logon_subauth );
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    if (alias_admins_sid && alias_users_sid && logon_sid && default_dacl)
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    {
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        const LUID_AND_ATTRIBUTES admin_privs[] =
        {
            { SeChangeNotifyPrivilege        , SE_PRIVILEGE_ENABLED },
            { SeSecurityPrivilege            , 0                    },
            { SeBackupPrivilege              , 0                    },
            { SeRestorePrivilege             , 0                    },
            { SeSystemtimePrivilege          , 0                    },
            { SeShutdownPrivilege            , 0                    },
            { SeRemoteShutdownPrivilege      , 0                    },
            { SeTakeOwnershipPrivilege       , 0                    },
            { SeDebugPrivilege               , 0                    },
            { SeSystemEnvironmentPrivilege   , 0                    },
            { SeSystemProfilePrivilege       , 0                    },
            { SeProfileSingleProcessPrivilege, 0                    },
            { SeIncreaseBasePriorityPrivilege, 0                    },
            { SeLoadDriverPrivilege          , 0                    },
            { SeCreatePagefilePrivilege      , 0                    },
            { SeIncreaseQuotaPrivilege       , 0                    },
            { SeUndockPrivilege              , 0                    },
            { SeManageVolumePrivilege        , 0                    },
            { SeImpersonatePrivilege         , SE_PRIVILEGE_ENABLED },
            { SeCreateGlobalPrivilege        , SE_PRIVILEGE_ENABLED },
        };
        /* note: we don't include non-builtin groups here for the user -
         * telling us these is the job of a client-side program */
        const SID_AND_ATTRIBUTES admin_groups[] =
        {
            { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
            { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
            { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
            { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
626
            { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_OWNER },
627
            { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
628
            { logon_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_LOGON_ID },
629
        };
630
        static const TOKEN_SOURCE admin_source = {"SeMgr", {0, 0}};
631 632 633
        /* note: we just set the user sid to be the interactive builtin sid -
         * we should really translate the UNIX user id to a sid */
        token = create_token( TRUE, &interactive_sid,
634
                            admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
635
                            admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
636
                            default_dacl, admin_source, NULL, -1 );
637 638
        /* we really need a primary group */
        assert( token->primary_group );
639 640
    }

641
    free( logon_sid );
642 643 644
    free( alias_admins_sid );
    free( alias_users_sid );
    free( default_dacl );
645

646
    return token;
647 648
}

649
static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665
{
    struct privilege *privilege;
    LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
    {
        if (is_equal_luid( luid, &privilege->luid ))
        {
            if (enabled_only && !privilege->enabled)
                return NULL;
            return privilege;
        }
    }
    return NULL;
}

static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
                                             unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
666
                                             unsigned int mod_privs_count )
667
{
668
    unsigned int i, modified_count = 0;
669

670 671 672
    /* mark as modified */
    allocate_luid( &token->modified_id );

673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707
    for (i = 0; i < count; i++)
    {
        struct privilege *privilege =
            token_find_privilege( token, &privs[i].Luid, FALSE );
        if (!privilege)
        {
            set_error( STATUS_NOT_ALL_ASSIGNED );
            continue;
        }

        if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
            privilege_remove( privilege );
        else
        {
            /* save previous state for caller */
            if (mod_privs_count)
            {
                luid_and_attr_from_privilege(mod_privs, privilege);
                mod_privs++;
                mod_privs_count--;
                modified_count++;
            }

            if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
                privilege->enabled = TRUE;
            else
                privilege->enabled = FALSE;
        }
    }
    return modified_count;
}

static void token_disable_privileges( struct token *token )
{
    struct privilege *privilege;
708 709 710 711

    /* mark as modified */
    allocate_luid( &token->modified_id );

712 713 714 715
    LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
        privilege->enabled = FALSE;
}

716 717 718 719
int token_check_privileges( struct token *token, int all_required,
                            const LUID_AND_ATTRIBUTES *reqprivs,
                            unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
{
720
    unsigned int i, enabled_count = 0;
721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743

    for (i = 0; i < count; i++)
    {
        struct privilege *privilege = 
            token_find_privilege( token, &reqprivs[i].Luid, TRUE );

        if (usedprivs)
            usedprivs[i] = reqprivs[i];

        if (privilege && privilege->enabled)
        {
            enabled_count++;
            if (usedprivs)
                usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
        }
    }

    if (all_required)
        return (enabled_count == count);
    else
        return (enabled_count > 0);
}

744 745
static int token_sid_present( struct token *token, const SID *sid, int deny )
{
746
    struct group *group;
747 748 749

    if (security_equal_sid( token->user, sid )) return TRUE;

750
    LIST_FOR_EACH_ENTRY( group, &token->groups, struct group, entry )
751 752 753 754 755 756 757 758 759 760
    {
        if (!group->enabled) continue;
        if (group->deny_only && !deny) continue;

        if (security_equal_sid( &group->sid, sid )) return TRUE;
    }

    return FALSE;
}

761 762 763 764 765 766
/* Checks access to a security descriptor. 'sd' must have been validated by
 * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
 * the reason. 'status' parameter will indicate if access is granted or denied.
 *
 * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
 */
767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
static unsigned int token_access_check( struct token *token,
                                 const struct security_descriptor *sd,
                                 unsigned int desired_access,
                                 LUID_AND_ATTRIBUTES *privs,
                                 unsigned int *priv_count,
                                 const GENERIC_MAPPING *mapping,
                                 unsigned int *granted_access,
                                 unsigned int *status )
{
    unsigned int current_access = 0;
    unsigned int denied_access = 0;
    ULONG i;
    const ACL *dacl;
    int dacl_present;
    const ACE_HEADER *ace;
    const SID *owner;

784
    /* assume no access rights */
785 786 787 788 789 790
    *granted_access = 0;

    /* fail if desired_access contains generic rights */
    if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
    {
        *priv_count = 0;
791
        return STATUS_GENERIC_NOT_MAPPED;
792 793 794 795 796 797 798
    }

    dacl = sd_get_dacl( sd, &dacl_present );
    owner = sd_get_owner( sd );
    if (!owner || !sd_get_group( sd ))
    {
        *priv_count = 0;
799
        return STATUS_INVALID_SECURITY_DESCR;
800 801 802 803 804 805 806
    }

    /* 1: Grant desired access if the object is unprotected */
    if (!dacl_present)
    {
        *priv_count = 0;
        *granted_access = desired_access;
807
        return *status = STATUS_SUCCESS;
808 809 810 811
    }
    if (!dacl)
    {
        *priv_count = 0;
812 813
        *status = STATUS_ACCESS_DENIED;
        return STATUS_SUCCESS;
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
    }

    /* 2: Check if caller wants access to system security part. Note: access
     * is only granted if specifically asked for */
    if (desired_access & ACCESS_SYSTEM_SECURITY)
    {
        const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
        LUID_AND_ATTRIBUTES retpriv = security_priv;
        if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
        {
            if (priv_count)
            {
                /* assumes that there will only be one privilege to return */
                if (*priv_count >= 1)
                {
                    *priv_count = 1;
                    *privs = retpriv;
                }
                else
                {
                    *priv_count = 1;
                    return STATUS_BUFFER_TOO_SMALL;
                }
            }
            current_access |= ACCESS_SYSTEM_SECURITY;
            if (desired_access == current_access)
            {
                *granted_access = current_access;
842
                return *status = STATUS_SUCCESS;
843 844 845 846 847
            }
        }
        else
        {
            *priv_count = 0;
848 849
            *status = STATUS_PRIVILEGE_NOT_HELD;
            return STATUS_SUCCESS;
850 851 852 853 854 855 856 857 858 859 860 861 862 863
        }
    }
    else if (priv_count) *priv_count = 0;

    /* 3: Check whether the token is the owner */
    /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
     * checked when a "set owner" call is made, overriding the access rights
     * determined here. */
    if (token_sid_present( token, owner, FALSE ))
    {
        current_access |= (READ_CONTROL | WRITE_DAC);
        if (desired_access == current_access)
        {
            *granted_access = current_access;
864
            return *status = STATUS_SUCCESS;
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
        }
    }

    /* 4: Grant rights according to the DACL */
    ace = (const ACE_HEADER *)(dacl + 1);
    for (i = 0; i < dacl->AceCount; i++)
    {
        const ACCESS_ALLOWED_ACE *aa_ace;
        const ACCESS_DENIED_ACE *ad_ace;
        const SID *sid;
        switch (ace->AceType)
        {
        case ACCESS_DENIED_ACE_TYPE:
            ad_ace = (const ACCESS_DENIED_ACE *)ace;
            sid = (const SID *)&ad_ace->SidStart;
            if (token_sid_present( token, sid, TRUE ))
            {
                unsigned int access = ad_ace->Mask;
                map_generic_mask(&access, mapping);
                if (desired_access & MAXIMUM_ALLOWED)
                    denied_access |= access;
                else
                {
                    denied_access |= (access & ~current_access);
889
                    if (desired_access & access) goto done;
890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915
                }
            }
            break;
        case ACCESS_ALLOWED_ACE_TYPE:
            aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
            sid = (const SID *)&aa_ace->SidStart;
            if (token_sid_present( token, sid, FALSE ))
            {
                unsigned int access = aa_ace->Mask;
                map_generic_mask(&access, mapping);
                if (desired_access & MAXIMUM_ALLOWED)
                    current_access |= access;
                else
                    current_access |= (access & ~denied_access);
            }
            break;
        }

        /* don't bother carrying on checking if we've already got all of
            * rights we need */
        if (desired_access == *granted_access)
            break;

        ace = ace_next( ace );
    }

916
done:
917 918 919 920 921 922
    if (desired_access & MAXIMUM_ALLOWED)
        *granted_access = current_access & ~denied_access;
    else
        if ((current_access & desired_access) == desired_access)
            *granted_access = current_access & desired_access;
        else
923 924 925 926
            *granted_access = 0;

    *status = *granted_access ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
    return STATUS_SUCCESS;
927 928
}

929 930 931 932 933
const ACL *token_get_default_dacl( struct token *token )
{
    return token->default_dacl;
}

934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
static void set_object_sd( struct object *obj, const struct security_descriptor *sd,
                           unsigned int set_info )
{
    struct security_descriptor new_sd, *pnew_sd;
    int present;
    const SID *owner, *group;
    const ACL *sacl, *dacl;
    char *ptr;

    if (!set_info) return;

    new_sd.control = sd->control & ~SE_SELF_RELATIVE;

    owner = sd_get_owner( sd );
    if (set_info & OWNER_SECURITY_INFORMATION && owner)
        new_sd.owner_len = sd->owner_len;
    else
    {
        owner = current->process->token->user;
        new_sd.owner_len = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
        new_sd.control |= SE_OWNER_DEFAULTED;
    }

    group = sd_get_group( sd );
    if (set_info & GROUP_SECURITY_INFORMATION && group)
        new_sd.group_len = sd->group_len;
    else
    {
        group = current->process->token->primary_group;
        new_sd.group_len = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
        new_sd.control |= SE_GROUP_DEFAULTED;
    }

    new_sd.control |= SE_SACL_PRESENT;
    sacl = sd_get_sacl( sd, &present );
    if (set_info & SACL_SECURITY_INFORMATION && present)
        new_sd.sacl_len = sd->sacl_len;
    else
    {
        if (obj->sd) sacl = sd_get_sacl( obj->sd, &present );

        if (obj->sd && present)
            new_sd.sacl_len = obj->sd->sacl_len;
        else
        {
            new_sd.sacl_len = 0;
            new_sd.control |= SE_SACL_DEFAULTED;
        }
    }

    new_sd.control |= SE_DACL_PRESENT;
    dacl = sd_get_dacl( sd, &present );
    if (set_info & DACL_SECURITY_INFORMATION && present)
        new_sd.dacl_len = sd->dacl_len;
    else
    {
        if (obj->sd) dacl = sd_get_dacl( obj->sd, &present );

        if (obj->sd && present)
            new_sd.dacl_len = obj->sd->dacl_len;
        else
        {
            dacl = token_get_default_dacl( current->process->token );
            new_sd.dacl_len = dacl->AclSize;
            new_sd.control |= SE_DACL_DEFAULTED;
        }
    }

    ptr = mem_alloc( sizeof(new_sd) + new_sd.owner_len + new_sd.group_len +
                     new_sd.sacl_len + new_sd.dacl_len );
    if (!ptr) return;
    pnew_sd = (struct security_descriptor*)ptr;

    memcpy( ptr, &new_sd, sizeof(new_sd) );
    ptr += sizeof(new_sd);
    memcpy( ptr, owner, new_sd.owner_len );
    ptr += new_sd.owner_len;
    memcpy( ptr, group, new_sd.group_len );
    ptr += new_sd.group_len;
    memcpy( ptr, sacl, new_sd.sacl_len );
    ptr += new_sd.sacl_len;
    memcpy( ptr, dacl, new_sd.dacl_len );

    free( obj->sd );
    obj->sd = pnew_sd;
}

1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
int check_object_access(struct object *obj, unsigned int *access)
{
    GENERIC_MAPPING mapping;
    struct token *token = current->token ? current->token : current->process->token;
    LUID_AND_ATTRIBUTES priv;
    unsigned int status, priv_count = 1;
    int res;

    mapping.GenericAll = obj->ops->map_access( obj, GENERIC_ALL );

    if (!obj->sd)
    {
        if (*access & MAXIMUM_ALLOWED)
            *access = mapping.GenericAll;
        return TRUE;
    }

    mapping.GenericRead  = obj->ops->map_access( obj, GENERIC_READ );
    mapping.GenericWrite = obj->ops->map_access( obj, GENERIC_WRITE );
    mapping.GenericExecute = obj->ops->map_access( obj, GENERIC_EXECUTE );

    res = token_access_check( token, obj->sd, *access, &priv, &priv_count,
                              &mapping, access, &status ) == STATUS_SUCCESS &&
          status == STATUS_SUCCESS;

    if (!res) set_error( STATUS_ACCESS_DENIED );
    return res;
}


1051 1052 1053
/* open a security token */
DECL_HANDLER(open_token)
{
1054
    if (req->flags & OPEN_TOKEN_THREAD)
1055 1056 1057 1058 1059
    {
        struct thread *thread = get_thread_from_handle( req->handle, 0 );
        if (thread)
        {
            if (thread->token)
1060 1061 1062 1063 1064 1065 1066
            {
                if (thread->token->impersonation_level <= SecurityAnonymous)
                    set_error( STATUS_CANT_OPEN_ANONYMOUS );
                else
                    reply->token = alloc_handle( current->process, thread->token,
                                                 req->access, req->attributes );
            }
1067
            else
1068
                set_error( STATUS_NO_TOKEN );
1069 1070 1071 1072 1073 1074 1075 1076 1077
            release_object( thread );
        }
    }
    else
    {
        struct process *process = get_process_from_handle( req->handle, 0 );
        if (process)
        {
            if (process->token)
1078
                reply->token = alloc_handle( current->process, process->token, req->access,
1079
                                             req->attributes );
1080
            else
1081
                set_error( STATUS_NO_TOKEN );
1082 1083 1084 1085
            release_object( process );
        }
    }
}
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104

/* adjust the privileges held by a token */
DECL_HANDLER(adjust_token_privileges)
{
    struct token *token;
    unsigned int access = TOKEN_ADJUST_PRIVILEGES;

    if (req->get_modified_state) access |= TOKEN_QUERY;

    if ((token = (struct token *)get_handle_obj( current->process, req->handle,
                                                 access, &token_ops )))
    {
        const LUID_AND_ATTRIBUTES *privs = get_req_data();
        LUID_AND_ATTRIBUTES *modified_privs = NULL;
        unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
        unsigned int modified_priv_count = 0;

        if (req->get_modified_state && !req->disable_all)
        {
1105
            unsigned int i;
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
            /* count modified privs */
            for (i = 0; i < priv_count; i++)
            {
                struct privilege *privilege =
                    token_find_privilege( token, &privs[i].Luid, FALSE );
                if (privilege && req->get_modified_state)
                    modified_priv_count++;
            }
            reply->len = modified_priv_count;
            modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
            if (modified_priv_count)
                modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
        }
        reply->len = modified_priv_count * sizeof(*modified_privs);

        if (req->disable_all)
            token_disable_privileges( token );
        else
            modified_priv_count = token_adjust_privileges( token, privs,
                priv_count, modified_privs, modified_priv_count );

        release_object( token );
    }
}

/* retrieves the list of privileges that may be held be the token */
DECL_HANDLER(get_token_privileges)
{
    struct token *token;

    if ((token = (struct token *)get_handle_obj( current->process, req->handle,
                                                 TOKEN_QUERY,
                                                 &token_ops )))
    {
        int priv_count = 0;
        LUID_AND_ATTRIBUTES *privs;
        struct privilege *privilege;

        LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
            priv_count++;

        reply->len = priv_count * sizeof(*privs);
        if (reply->len <= get_reply_max_size())
        {
            privs = set_reply_data_size( priv_count * sizeof(*privs) );
            if (privs)
            {
                int i = 0;
                LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
                {
                    luid_and_attr_from_privilege( &privs[i], privilege );
                    i++;
                }
            }
        }
        else
            set_error(STATUS_BUFFER_TOO_SMALL);

        release_object( token );
    }
}

/* creates a duplicate of the token */
DECL_HANDLER(duplicate_token)
{
    struct token *src_token;
1172 1173 1174 1175 1176 1177 1178 1179

    if ((req->impersonation_level < SecurityAnonymous) ||
        (req->impersonation_level > SecurityDelegation))
    {
        set_error( STATUS_BAD_IMPERSONATION_LEVEL );
        return;
    }

1180 1181 1182 1183
    if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
                                                     TOKEN_DUPLICATE,
                                                     &token_ops )))
    {
1184
        const luid_t *modified_id =
1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195
            req->primary || (req->impersonation_level == src_token->impersonation_level) ?
                &src_token->modified_id : NULL;
        struct token *token = NULL;

        if (req->primary || (req->impersonation_level <= src_token->impersonation_level))
            token = create_token( req->primary, src_token->user, NULL, 0,
                                  NULL, 0, src_token->default_dacl,
                                  src_token->source, modified_id,
                                  req->impersonation_level );
        else set_error( STATUS_BAD_IMPERSONATION_LEVEL );

1196 1197 1198
        if (token)
        {
            struct privilege *privilege;
1199
            struct group *group;
1200 1201
            unsigned int access;

1202
            /* copy groups */
1203
            LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct group, entry )
1204
            {
1205 1206
                size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[group->sid.SubAuthorityCount] );
                struct group *newgroup = mem_alloc( size );
1207 1208 1209 1210 1211 1212
                if (!newgroup)
                {
                    release_object( token );
                    release_object( src_token );
                    return;
                }
1213 1214 1215
                memcpy( newgroup, group, size );
                list_add_tail( &token->groups, &newgroup->entry );
            }
1216 1217
            token->primary_group = src_token->primary_group;
            assert( token->primary_group );
1218

1219
            /* copy privileges */
1220 1221 1222 1223
            LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
                privilege_add( token, &privilege->luid, privilege->enabled );

            access = req->access;
1224
            reply->new_handle = alloc_handle( current->process, token, access, req->attributes);
1225 1226 1227 1228 1229
            release_object( token );
        }
        release_object( src_token );
    }
}
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/* checks the specified privileges are held by the token */
DECL_HANDLER(check_token_privileges)
{
    struct token *token;

    if ((token = (struct token *)get_handle_obj( current->process, req->handle,
                                                 TOKEN_QUERY,
                                                 &token_ops )))
    {
        unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
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        if (!token->primary && token->impersonation_level <= SecurityAnonymous)
            set_error( STATUS_BAD_IMPERSONATION_LEVEL );
        else if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
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        {
            LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
            reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
        }
        else
            set_error( STATUS_BUFFER_OVERFLOW );
        release_object( token );
    }
}
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/* checks that a user represented by a token is allowed to access an object
 * represented by a security descriptor */
DECL_HANDLER(access_check)
{
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    data_size_t sd_size = get_req_data_size();
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    const struct security_descriptor *sd = get_req_data();
    struct token *token;

    if (!sd_is_valid( sd, sd_size ))
    {
        set_error( STATUS_ACCESS_VIOLATION );
        return;
    }

    if ((token = (struct token *)get_handle_obj( current->process, req->handle,
                                                 TOKEN_QUERY,
                                                 &token_ops )))
    {
        GENERIC_MAPPING mapping;
        unsigned int status;
        LUID_AND_ATTRIBUTES priv;
        unsigned int priv_count = 1;

        memset(&priv, 0, sizeof(priv));

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        /* only impersonation tokens may be used with this function */
        if (token->primary)
        {
            set_error( STATUS_NO_IMPERSONATION_TOKEN );
            release_object( token );
            return;
        }
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        /* anonymous impersonation tokens can't be used */
        if (token->impersonation_level <= SecurityAnonymous)
        {
            set_error( STATUS_BAD_IMPERSONATION_LEVEL );
            release_object( token );
            return;
        }
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        mapping.GenericRead = req->mapping_read;
        mapping.GenericWrite = req->mapping_write;
        mapping.GenericExecute = req->mapping_execute;
        mapping.GenericAll = req->mapping_all;

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        status = token_access_check(
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            token, sd, req->desired_access, &priv, &priv_count, &mapping,
1302
            &reply->access_granted, &reply->access_status );
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        reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);

        if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
        {
            LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
            memcpy( privs, &priv, sizeof(priv) );
        }

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        set_error( status );
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        release_object( token );
    }
}
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1317
/* retrieves the SID of the user that the token represents */
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DECL_HANDLER(get_token_user)
{
    struct token *token;

    reply->user_len = 0;

    if ((token = (struct token *)get_handle_obj( current->process, req->handle,
                                                 TOKEN_QUERY,
                                                 &token_ops )))
    {
        const SID *user = token->user;

        reply->user_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
        if (reply->user_len <= get_reply_max_size())
        {
            SID *user_reply = set_reply_data_size( reply->user_len );
            if (user_reply)
                memcpy( user_reply, user, reply->user_len );
        }
        else set_error( STATUS_BUFFER_TOO_SMALL );

        release_object( token );
    }
}
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/* retrieves the groups that the user represented by the token belongs to */
DECL_HANDLER(get_token_groups)
{
    struct token *token;

    reply->user_len = 0;

    if ((token = (struct token *)get_handle_obj( current->process, req->handle,
                                                 TOKEN_QUERY,
                                                 &token_ops )))
    {
        size_t size_needed = sizeof(struct token_groups);
        unsigned int group_count = 0;
        const struct group *group;

        LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
        {
            group_count++;
            size_needed += FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]);
        }
        size_needed += sizeof(unsigned int) * group_count;

        reply->user_len = size_needed;

        if (size_needed <= get_reply_max_size())
        {
            struct token_groups *tg = set_reply_data_size( size_needed );
            if (tg)
            {
                unsigned int *attr_ptr = (unsigned int *)(tg + 1);
                SID *sid_ptr = (SID *)(attr_ptr + group_count);

                tg->count = group_count;

                LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
                {

                    *attr_ptr = 0;
                    if (group->mandatory) *attr_ptr |= SE_GROUP_MANDATORY;
                    if (group->def) *attr_ptr |= SE_GROUP_ENABLED_BY_DEFAULT;
                    if (group->enabled) *attr_ptr |= SE_GROUP_ENABLED;
                    if (group->owner) *attr_ptr |= SE_GROUP_OWNER;
                    if (group->deny_only) *attr_ptr |= SE_GROUP_USE_FOR_DENY_ONLY;
                    if (group->resource) *attr_ptr |= SE_GROUP_RESOURCE;

                    memcpy(sid_ptr, &group->sid, FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));

                    sid_ptr = (SID *)((char *)sid_ptr + FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
                    attr_ptr++;
                }
            }
        }
        else set_error( STATUS_BUFFER_TOO_SMALL );

        release_object( token );
    }
}
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DECL_HANDLER(get_token_impersonation_level)
{
    struct token *token;

    if ((token = (struct token *)get_handle_obj( current->process, req->handle,
                                                 TOKEN_QUERY,
                                                 &token_ops )))
    {
        if (token->primary)
            set_error( STATUS_INVALID_PARAMETER );
        else
            reply->impersonation_level = token->impersonation_level;

        release_object( token );
    }
}

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DECL_HANDLER(set_security_object)
{
    data_size_t sd_size = get_req_data_size();
    const struct security_descriptor *sd = get_req_data();
    struct object *obj;
    unsigned int access = 0;

    if (!sd_is_valid( sd, sd_size ))
    {
        set_error( STATUS_ACCESS_VIOLATION );
        return;
    }

    if (req->security_info & OWNER_SECURITY_INFORMATION ||
        req->security_info & GROUP_SECURITY_INFORMATION)
        access |= WRITE_OWNER;
    if (req->security_info & SACL_SECURITY_INFORMATION)
        access |= ACCESS_SYSTEM_SECURITY;
    if (req->security_info & DACL_SECURITY_INFORMATION)
        access |= WRITE_DAC;

    if (!(obj = get_handle_obj( current->process, req->handle, access, NULL ))) return;

    set_object_sd( obj, sd, req->security_info );
    release_object( obj );
}