libmlsvc/common/lsalib.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
 */

/*
 * This module provides the high level interface to the LSA RPC functions.
 */

#include <strings.h>
#include <unistd.h>

#include <smbsrv/libsmb.h>
#include <smbsrv/libmlsvc.h>
#include <smbsrv/smbinfo.h>
#include <smbsrv/smb_token.h>

#include <lsalib.h>

static uint32_t lsa_lookup_name_builtin(char *, char *, smb_account_t *);
static uint32_t lsa_lookup_name_domain(char *, smb_account_t *);

static uint32_t lsa_lookup_sid_builtin(smb_sid_t *, smb_account_t *);
static uint32_t lsa_lookup_sid_domain(smb_sid_t *, smb_account_t *);

static uint32_t lsa_list_accounts(mlsvc_handle_t *);
static uint32_t lsa_map_status(uint32_t);

/*
 * Lookup the given account and returns the account information
 * in the passed smb_account_t structure.
 *
 * The lookup is performed in the following order:
 *    well known accounts
 *    local accounts
 *    domain accounts
 *
 * If it's established the given account is well know or local
 * but the lookup fails for some reason, the next step(s) won't be
 * performed.
 *
 * If the name is a domain account, it may refer to a user, group or
 * alias. If it is a local account, its type should be specified
 * in the sid_type parameter. In case the account type is unknown
 * sid_type should be set to SidTypeUnknown.
 *
 * account argument could be either [domain\]name or [domain/]name.
 *
 * Return status:
 *
 *   NT_STATUS_SUCCESS      Account is successfully translated
 *   NT_STATUS_NONE_MAPPED  Couldn't translate the account
 */
uint32_t
lsa_lookup_name(char *account, uint16_t type, smb_account_t *info)
{
    char nambuf[SMB_USERNAME_MAXLEN];
    char dombuf[SMB_PI_MAX_DOMAIN];
    char *name, *domain;
    uint32_t status;
    char *slash;

    (void) strsubst(account, '/', '\\');
    (void) strcanon(account, "\\");
    /* \john -> john */
    account += strspn(account, "\\");

    if ((slash = strchr(account, '\\')) != NULL) {
        *slash = '\0';
        (void) strlcpy(dombuf, account, sizeof (dombuf));
        (void) strlcpy(nambuf, slash + 1, sizeof (nambuf));
        *slash = '\\';
        name = nambuf;
        domain = dombuf;
    } else {
        name = account;
        domain = NULL;
    }

    status = lsa_lookup_name_builtin(domain, name, info);
    if (status == NT_STATUS_NOT_FOUND) {
        status = smb_sam_lookup_name(domain, name, type, info);
        if (status == NT_STATUS_SUCCESS)
            return (status);

        if ((domain == NULL) || (status == NT_STATUS_NOT_FOUND))
            status = lsa_lookup_name_domain(account, info);
    }

    return ((status == NT_STATUS_SUCCESS) ? status : NT_STATUS_NONE_MAPPED);
}

uint32_t
lsa_lookup_sid(smb_sid_t *sid, smb_account_t *info)
{
    uint32_t status;

    if (!smb_sid_isvalid(sid))
        return (NT_STATUS_INVALID_SID);

    status = lsa_lookup_sid_builtin(sid, info);
    if (status == NT_STATUS_NOT_FOUND) {
        status = smb_sam_lookup_sid(sid, info);
        if (status == NT_STATUS_NOT_FOUND)
            status = lsa_lookup_sid_domain(sid, info);
    }

    return ((status == NT_STATUS_SUCCESS) ? status : NT_STATUS_NONE_MAPPED);
}

/*
 * Obtains the primary domain SID and name from the specified server
 * (domain controller).
 *
 * The requested information will be returned via 'info' argument.
 *
 * Returns NT status codes. (Raw, not LSA-ized)
 */
DWORD
lsa_query_primary_domain_info(char *server, char *domain,
    smb_domain_t *info)
{
    mlsvc_handle_t domain_handle;
    char user[SMB_USERNAME_MAXLEN];
    DWORD status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    status = lsar_open(server, domain, user, &domain_handle);
    if (status != 0)
        return (status);

    status = lsar_query_info_policy(&domain_handle,
        MSLSA_POLICY_PRIMARY_DOMAIN_INFO, info);

    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * Obtains the account domain SID and name from the current server
 * (domain controller).
 *
 * The requested information will be returned via 'info' argument.
 *
 * Returns NT status codes. (Raw, not LSA-ized)
 */
DWORD
lsa_query_account_domain_info(char *server, char *domain,
    smb_domain_t *info)
{
    mlsvc_handle_t domain_handle;
    char user[SMB_USERNAME_MAXLEN];
    DWORD status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    status = lsar_open(server, domain, user, &domain_handle);
    if (status != 0)
        return (status);

    status = lsar_query_info_policy(&domain_handle,
        MSLSA_POLICY_ACCOUNT_DOMAIN_INFO, info);

    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * lsa_query_dns_domain_info
 *
 * Obtains the DNS domain info from the specified server
 * (domain controller).
 *
 * The requested information will be returned via 'info' argument.
 *
 * Returns NT status codes. (Raw, not LSA-ized)
 */
DWORD
lsa_query_dns_domain_info(char *server, char *domain, smb_domain_t *info)
{
    mlsvc_handle_t domain_handle;
    char user[SMB_USERNAME_MAXLEN];
    DWORD status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    status = lsar_open(server, domain, user, &domain_handle);
    if (status != 0)
        return (status);

    status = lsar_query_info_policy(&domain_handle,
        MSLSA_POLICY_DNS_DOMAIN_INFO, info);

    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * Enumerate the trusted domains of  primary domain.
 * This is the basic enumaration call which only returns the
 * NetBIOS name of the domain and its SID.
 *
 * The requested information will be returned via 'info' argument.
 *
 * Returns NT status codes.  (Raw, not LSA-ized)
 */
DWORD
lsa_enum_trusted_domains(char *server, char *domain,
    smb_trusted_domains_t *info)
{
    mlsvc_handle_t domain_handle;
    char user[SMB_USERNAME_MAXLEN];
    DWORD enum_context;
    DWORD status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    status = lsar_open(server, domain, user, &domain_handle);
    if (status != 0)
        return (status);

    enum_context = 0;

    status = lsar_enum_trusted_domains(&domain_handle, &enum_context, info);
    if (status == NT_STATUS_NO_MORE_ENTRIES) {
        /*
         * STATUS_NO_MORE_ENTRIES indicates that we
         * have all of the available information.
         */
        status = NT_STATUS_SUCCESS;
    }

    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * Enumerate the trusted domains of the primary domain.
 * This is the extended enumaration call which besides
 * NetBIOS name of the domain and its SID, it will return
 * the FQDN plus some trust information which is not used.
 *
 * The requested information will be returned via 'info' argument.
 *
 * Returns NT status codes. (Raw, not LSA-ized)
 */
DWORD
lsa_enum_trusted_domains_ex(char *server, char *domain,
    smb_trusted_domains_t *info)
{
    mlsvc_handle_t domain_handle;
    char user[SMB_USERNAME_MAXLEN];
    DWORD enum_context;
    DWORD status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    status = lsar_open(server, domain, user, &domain_handle);
    if (status != 0)
        return (status);

    enum_context = 0;

    status = lsar_enum_trusted_domains_ex(&domain_handle, &enum_context,
        info);
    if (status == NT_STATUS_NO_MORE_ENTRIES) {
        /*
         * STATUS_NO_MORE_ENTRIES indicates that we
         * have all of the available information.
         */
        status = NT_STATUS_SUCCESS;
    }

    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * Lookup well known accounts table
 *
 * Return status:
 *
 *   NT_STATUS_SUCCESS      Account is translated successfully
 *   NT_STATUS_NOT_FOUND    This is not a well known account
 *   NT_STATUS_NONE_MAPPED  Account is found but domains don't match
 *   NT_STATUS_NO_MEMORY    Memory shortage
 *   NT_STATUS_INTERNAL_ERROR   Internal error/unexpected failure
 */
static uint32_t
lsa_lookup_name_builtin(char *domain, char *name, smb_account_t *info)
{
    smb_wka_t *wka;
    char *wkadom;

    bzero(info, sizeof (smb_account_t));

    if ((wka = smb_wka_lookup_name(name)) == NULL)
        return (NT_STATUS_NOT_FOUND);

    if ((wkadom = smb_wka_get_domain(wka->wka_domidx)) == NULL)
        return (NT_STATUS_INTERNAL_ERROR);

    if ((domain != NULL) && (smb_strcasecmp(domain, wkadom, 0) != 0))
        return (NT_STATUS_NONE_MAPPED);

    info->a_name = strdup(name);
    info->a_sid = smb_sid_dup(wka->wka_binsid);
    info->a_domain = strdup(wkadom);
    info->a_domsid = smb_sid_split(wka->wka_binsid, &info->a_rid);
    info->a_type = wka->wka_type;

    if (!smb_account_validate(info)) {
        smb_account_free(info);
        return (NT_STATUS_NO_MEMORY);
    }

    return (NT_STATUS_SUCCESS);
}

/*
 * Lookup a domain account by its name.
 *
 * The information is returned in the user_info structure.
 * The caller is responsible for allocating and releasing
 * this structure.
 *
 * Returns NT status codes. (LSA-ized)
 */
static uint32_t
lsa_lookup_name_domain(char *account_name, smb_account_t *info)
{
    mlsvc_handle_t domain_handle;
    smb_domainex_t dinfo;
    char user[SMB_USERNAME_MAXLEN];
    uint32_t status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    if (!smb_domain_getinfo(&dinfo))
        return (NT_STATUS_CANT_ACCESS_DOMAIN_INFO);

    status = lsar_open(dinfo.d_dci.dc_name, dinfo.d_primary.di_nbname,
        user, &domain_handle);
    if (status != 0)
        return (lsa_map_status(status));

    status = lsar_lookup_names(&domain_handle, account_name, info);

    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * lsa_lookup_privs
 *
 * Request the privileges associated with the specified account. In
 * order to get the privileges, we first have to lookup the name on
 * the specified domain controller and obtain the appropriate SID.
 * The SID can then be used to open the account and obtain the
 * account privileges. The results from both the name lookup and the
 * privileges are returned in the user_info structure. The caller is
 * responsible for allocating and releasing this structure.
 *
 * Returns NT status codes. (LSA-ized)
 */
/*ARGSUSED*/
DWORD
lsa_lookup_privs(char *account_name, char *target_name, smb_account_t *ainfo)
{
    mlsvc_handle_t domain_handle;
    smb_domainex_t dinfo;
    char user[SMB_USERNAME_MAXLEN];
    DWORD status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    if (!smb_domain_getinfo(&dinfo))
        return (NT_STATUS_CANT_ACCESS_DOMAIN_INFO);

    status = lsar_open(dinfo.d_dci.dc_name, dinfo.d_primary.di_nbname,
        user, &domain_handle);
    if (status != 0)
        return (lsa_map_status(status));

    status = lsa_list_accounts(&domain_handle);
    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * lsa_list_privs
 *
 * List the privileges supported by the specified server.
 * This function is only intended for diagnostics.
 *
 * Returns NT status codes. (LSA-ized)
 */
DWORD
lsa_list_privs(char *server, char *domain)
{
    static char name[128];
    static struct ms_luid luid;
    mlsvc_handle_t domain_handle;
    char user[SMB_USERNAME_MAXLEN];
    DWORD status;
    int rc;
    int i;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    status = lsar_open(server, domain, user, &domain_handle);
    if (status != 0)
        return (lsa_map_status(status));

    for (i = 0; i < 30; ++i) {
        luid.low_part = i;
        rc = lsar_lookup_priv_name(&domain_handle, &luid, name, 128);
        if (rc != 0)
            continue;

        (void) lsar_lookup_priv_value(&domain_handle, name, &luid);
        (void) lsar_lookup_priv_display_name(&domain_handle, name,
            name, 128);
    }

    (void) lsar_close(&domain_handle);
    return (NT_STATUS_SUCCESS);
}

/*
 * lsa_list_accounts
 *
 * This function can be used to list the accounts in the specified
 * domain. For now the SIDs are just listed in the system log.
 *
 * Returns NT status
 */
static DWORD
lsa_list_accounts(mlsvc_handle_t *domain_handle)
{
    mlsvc_handle_t account_handle;
    struct mslsa_EnumAccountBuf accounts;
    struct mslsa_sid *sid;
    smb_account_t ainfo;
    DWORD enum_context = 0;
    DWORD status;
    int i;

    bzero(&accounts, sizeof (struct mslsa_EnumAccountBuf));

    do {
        status = lsar_enum_accounts(domain_handle, &enum_context,
            &accounts);
        if (status != 0)
            return (status);

        for (i = 0; i < accounts.entries_read; ++i) {
            sid = accounts.info[i].sid;

            if (lsar_open_account(domain_handle, sid,
                &account_handle) == 0) {
                (void) lsar_enum_privs_account(&account_handle,
                    &ainfo);
                (void) lsar_close(&account_handle);
            }

            free(accounts.info[i].sid);
        }

        if (accounts.info)
            free(accounts.info);
    } while (status == 0 && accounts.entries_read != 0);

    return (0);
}

/*
 * Lookup well known accounts table for the given SID
 *
 * Return status:
 *
 *   NT_STATUS_SUCCESS      Account is translated successfully
 *   NT_STATUS_NOT_FOUND    This is not a well known account
 *   NT_STATUS_NO_MEMORY    Memory shortage
 *   NT_STATUS_INTERNAL_ERROR   Internal error/unexpected failure
 */
static uint32_t
lsa_lookup_sid_builtin(smb_sid_t *sid, smb_account_t *ainfo)
{
    smb_wka_t *wka;
    char *wkadom;

    bzero(ainfo, sizeof (smb_account_t));

    if ((wka = smb_wka_lookup_sid(sid)) == NULL)
        return (NT_STATUS_NOT_FOUND);

    if ((wkadom = smb_wka_get_domain(wka->wka_domidx)) == NULL)
        return (NT_STATUS_INTERNAL_ERROR);

    ainfo->a_name = strdup(wka->wka_name);
    ainfo->a_sid = smb_sid_dup(wka->wka_binsid);
    ainfo->a_domain = strdup(wkadom);
    ainfo->a_domsid = smb_sid_split(ainfo->a_sid, &ainfo->a_rid);
    ainfo->a_type = wka->wka_type;

    if (!smb_account_validate(ainfo)) {
        smb_account_free(ainfo);
        return (NT_STATUS_NO_MEMORY);
    }

    return (NT_STATUS_SUCCESS);
}

/*
 * Lookup a domain account by its SID.
 *
 * The information is returned in the user_info structure.
 * The caller is responsible for allocating and releasing
 * this structure.
 *
 * Returns NT status codes. (LSA-ized)
 */
static uint32_t
lsa_lookup_sid_domain(smb_sid_t *sid, smb_account_t *ainfo)
{
    mlsvc_handle_t domain_handle;
    smb_domainex_t dinfo;
    char user[SMB_USERNAME_MAXLEN];
    uint32_t status;

    smb_ipc_get_user(user, SMB_USERNAME_MAXLEN);

    if (!smb_domain_getinfo(&dinfo))
        return (NT_STATUS_CANT_ACCESS_DOMAIN_INFO);

    status = lsar_open(dinfo.d_dci.dc_name, dinfo.d_primary.di_nbname,
        user, &domain_handle);
    if (status != 0)
        return (lsa_map_status(status));

    status = lsar_lookup_sids(&domain_handle, sid, ainfo);

    (void) lsar_close(&domain_handle);
    return (status);
}

/*
 * Most functions that call the local security authority expect
 * only a limited set of status returns.  This function maps the
 * status we get from talking to our domain controller into one
 * that LSA functions can return.  Most common errors become:
 * NT_STATUS_CANT_ACCESS_DOMAIN_INFO (when no DC etc.)
 */
static uint32_t
lsa_map_status(uint32_t status)
{
    switch (status) {
    case NT_STATUS_SUCCESS:
        break;
    case NT_STATUS_INVALID_PARAMETER:   /* rpc bind */
        break;
    case NT_STATUS_NO_MEMORY:
        break;
    case NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND:
    case NT_STATUS_BAD_NETWORK_PATH:    /* get server addr */
    case NT_STATUS_NETWORK_ACCESS_DENIED:   /* authentication */
    case NT_STATUS_BAD_NETWORK_NAME:    /* tree connect */
    case NT_STATUS_ACCESS_DENIED:       /* open pipe */
        status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
        break;
    default:
        status = NT_STATUS_UNSUCCESSFUL;
        break;
    }
    return (status);
}