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/*
SSSD
ID-mapping library
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2012 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SSS_IDMAP_H_
#define SSS_IDMAP_H_
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#define DOM_SID_PREFIX "S-1-5-21-"
#define DOM_SID_PREFIX_LEN (sizeof(DOM_SID_PREFIX) - 1)
/**
* @defgroup sss_idmap Map Unix UIDs and GIDs to SIDs and back
* Libsss_idmap provides a mechanism to translate a SID to a UNIX UID or GID
* or the other way round.
* @{
*/
/**
* Error codes used by libsss_idmap
*/
enum idmap_error_code {
/** Success */
IDMAP_SUCCESS = 0,
/** Function is not yet implemented */
IDMAP_NOT_IMPLEMENTED,
/** General error */
IDMAP_ERROR,
/** Ran out of memory during processing */
IDMAP_OUT_OF_MEMORY,
/** No domain added */
IDMAP_NO_DOMAIN,
/** The provided idmap context is invalid */
IDMAP_CONTEXT_INVALID,
/** The provided SID is invalid */
IDMAP_SID_INVALID,
/** The provided SID was not found */
IDMAP_SID_UNKNOWN,
/** The provided UID or GID could not be mapped */
IDMAP_NO_RANGE
};
/**
* Typedef for memory allocation functions
*/
typedef void *(idmap_alloc_func)(size_t size, void *pvt);
typedef void (idmap_free_func)(void *ptr, void *pvt);
/**
* Structure for id ranges
* FIXME: this struct might change when it is clear how ranges are handled on
* the server side
*/
struct sss_idmap_range {
uint32_t min;
uint32_t max;
};
/**
* Opaque type for SIDs
*/
struct dom_sid;
/**
* Opaque type for the idmap context
*/
struct sss_idmap_ctx;
/**
* @brief Initialize idmap context
*
* @param[in] alloc_func Function to allocate memory for the context, if
* NULL malloc() id used
* @param[in] alloc_pvt Private data for allocation routine
* @param[in] free_func Function to free the memory the context, if
* NULL free() id used
* @param[out] ctx idmap context
*
* @return
* - #IDMAP_OUT_OF_MEMORY: Insufficient memory to create the context
*/
enum idmap_error_code sss_idmap_init(idmap_alloc_func *alloc_func,
void *alloc_pvt,
idmap_free_func *free_func,
struct sss_idmap_ctx **ctx);
/**
* @brief Add a domain to the idmap context
*
* @param[in] ctx Idmap context
* @param[in] domain_name Zero-terminated string with the domain name
* @param[in] domain_sid Zero-terminated string representation of the domain
* SID (S-1-15-.....)
* @param[in] range TBD Some information about the id ranges of this
* domain
*
* @return
* - #IDMAP_OUT_OF_MEMORY: Insufficient memory to store the data in the idmap
* context
* - #IDMAP_SID_INVALID: Invalid SID provided
* - #IDMAP_NO_DOMAIN: No domain domain name given
*/
enum idmap_error_code sss_idmap_add_domain(struct sss_idmap_ctx *ctx,
const char *domain_name,
const char *domain_sid,
struct sss_idmap_range *range);
/**
* @brief Translate SID to a unix UID or GID
*
* @param[in] ctx Idmap context
* @param[in] sid Zero-terminated string representation of the SID
* @param[out] id Returned unix UID or GID
*
* @return
* - #IDMAP_NO_DOMAIN: No domains are added to the idmap context
* - #IDMAP_SID_INVALID: Invalid SID provided
* - #IDMAP_SID_UNKNOWN: SID cannot be found in the domains added to the
* idmap context
*/
enum idmap_error_code sss_idmap_sid_to_unix(struct sss_idmap_ctx *ctx,
const char *sid,
uint32_t *id);
/**
* @brief Translate a SID stucture to a unix UID or GID
*
* @param[in] ctx Idmap context
* @param[in] dom_sid SID structure
* @param[out] id Returned unix UID or GID
*
* @return
* - #IDMAP_NO_DOMAIN: No domains are added to the idmap context
* - #IDMAP_SID_INVALID: Invalid SID provided
* - #IDMAP_SID_UNKNOWN: SID cannot be found in the domains added to the
* idmap context
*/
enum idmap_error_code sss_idmap_dom_sid_to_unix(struct sss_idmap_ctx *ctx,
struct dom_sid *dom_sid,
uint32_t *id);
/**
* @brief Translate a binary SID to a unix UID or GID
*
* @param[in] ctx Idmap context
* @param[in] bin_sid Array with the binary SID
* @param[in] length Size of the array containing the binary SID
* @param[out] id Returned unix UID or GID
*
* @return
* - #IDMAP_NO_DOMAIN: No domains are added to the idmap context
* - #IDMAP_SID_INVALID: Invalid SID provided
* - #IDMAP_SID_UNKNOWN: SID cannot be found in the domains added to the
* idmap context
*/
enum idmap_error_code sss_idmap_bin_sid_to_unix(struct sss_idmap_ctx *ctx,
uint8_t *bin_sid,
size_t length,
uint32_t *id);
/**
* @brief Translate unix UID or GID to a SID
*
* @param[in] ctx Idmap context
* @param[in] id unix UID or GID
* @param[out] sid Zero-terminated string representation of the SID, must be
* freed if not needed anymore
*
* @return
* - #IDMAP_NO_DOMAIN: No domains are added to the idmap context
* - #IDMAP_NO_RANGE: The provided ID cannot be found in the domains added
* to the idmap context
*/
enum idmap_error_code sss_idmap_unix_to_sid(struct sss_idmap_ctx *ctx,
uint32_t id,
char **sid);
/**
* @brief Translate unix UID or GID to a SID structure
*
* @param[in] ctx Idmap context
* @param[in] id unix UID or GID
* @param[out] dom_sid SID structure, must be freed if not needed anymore
*
* @return
* - #IDMAP_NO_DOMAIN: No domains are added to the idmap context
* - #IDMAP_NO_RANGE: The provided ID cannot be found in the domains added
* to the idmap context
*/
enum idmap_error_code sss_idmap_unix_to_dom_sid(struct sss_idmap_ctx *ctx,
uint32_t id,
struct dom_sid **dom_sid);
/**
* @brief Translate unix UID or GID to a binary SID
*
* @param[in] ctx Idmap context
* @param[in] id unix UID or GID
* @param[out] bin_sid Array with the binary SID,
* must be freed if not needed anymore
* @param[out] length size of the array containing the binary SID
*
* @return
* - #IDMAP_NO_DOMAIN: No domains are added to the idmap context
* - #IDMAP_NO_RANGE: The provided ID cannot be found in the domains added
* to the idmap context
*/
enum idmap_error_code sss_idmap_unix_to_bin_sid(struct sss_idmap_ctx *ctx,
uint32_t id,
uint8_t **bin_sid,
size_t *length);
/**
* @brief Free all the allocated memory of the idmap context
*
* @param[in] ctx Idmap context
*
* @return
* - #IDMAP_CONTEXT_INVALID: Provided context is invalid
*/
enum idmap_error_code sss_idmap_free(struct sss_idmap_ctx *ctx);
/**
* @brief Translate error code to a string
*
* @param[in] err Idmap error code
*
* @return
* - Error description as a zero-terminated string
*/
const char *idmap_error_string(enum idmap_error_code err);
/**
* @brief Check if given string can be used as domain SID
*
* @param[in] str String to check
*
* @return
* - true: String can be used as domain SID
* - false: String can not be used as domain SID
*/
bool is_domain_sid(const char *str);
/**
* @brief Convert binary SID to SID structure
*
* @param[in] ctx Idmap context
* @param[in] bin_sid Array with the binary SID
* @param[in] length Size of the array containing the binary SID
* @param[out] dom_sid SID structure,
* must be freed if not needed anymore
*
* @return
* - #IDMAP_SID_INVALID: Given SID is invalid
* - #IDMAP_OUT_OF_MEMORY: Failed to allocate memory for the result
*/
enum idmap_error_code sss_idmap_bin_sid_to_dom_sid(struct sss_idmap_ctx *ctx,
const uint8_t *bin_sid,
size_t length,
struct dom_sid **dom_sid);
/**
* @brief Convert binary SID to SID string
*
* @param[in] ctx Idmap context
* @param[in] bin_sid Array with the binary SID
* @param[in] length Size of the array containing the binary SID
* @param[out] sid Zero-terminated string representation of the SID,
* must be freed if not needed anymore
*
* @return
* - #IDMAP_SID_INVALID: Given SID is invalid
* - #IDMAP_OUT_OF_MEMORY: Failed to allocate memory for the result
*/
enum idmap_error_code sss_idmap_bin_sid_to_sid(struct sss_idmap_ctx *ctx,
const uint8_t *bin_sid,
size_t length,
char **sid);
/**
* @brief Convert SID structure to binary SID
*
* @param[in] ctx Idmap context
* @param[in] dom_sid SID structure
* @param[out] bin_sid Array with the binary SID,
* must be freed if not needed anymore
* @param[out] length Size of the array containing the binary SID
*
* @return
* - #IDMAP_SID_INVALID: Given SID is invalid
* - #IDMAP_OUT_OF_MEMORY: Failed to allocate memory for the result
*/
enum idmap_error_code sss_idmap_dom_sid_to_bin_sid(struct sss_idmap_ctx *ctx,
struct dom_sid *dom_sid,
uint8_t **bin_sid,
size_t *length);
/**
* @brief Convert SID string to binary SID
*
* @param[in] ctx Idmap context
* @param[in] sid Zero-terminated string representation of the SID
* @param[out] bin_sid Array with the binary SID,
* must be freed if not needed anymore
* @param[out] length Size of the array containing the binary SID
*
* @return
* - #IDMAP_SID_INVALID: Given SID is invalid
* - #IDMAP_OUT_OF_MEMORY: Failed to allocate memory for the result
*/
enum idmap_error_code sss_idmap_sid_to_bin_sid(struct sss_idmap_ctx *ctx,
const char *sid,
uint8_t **bin_sid,
size_t *length);
/**
* @brief Convert SID structure to SID string
*
* @param[in] ctx Idmap context
* @param[in] dom_sid SID structure
* @param[out] sid Zero-terminated string representation of the SID,
* must be freed if not needed anymore
*
* @return
* - #IDMAP_SID_INVALID: Given SID is invalid
* - #IDMAP_OUT_OF_MEMORY: Failed to allocate memory for the result
*/
enum idmap_error_code sss_idmap_dom_sid_to_sid(struct sss_idmap_ctx *ctx,
struct dom_sid *dom_sid,
char **sid);
/**
* @brief Convert SID string to SID structure
*
* @param[in] ctx Idmap context
* @param[in] sid Zero-terminated string representation of the SID
* @param[out] dom_sid SID structure,
* must be freed if not needed anymore
*
* @return
* - #IDMAP_SID_INVALID: Given SID is invalid
* - #IDMAP_OUT_OF_MEMORY: Failed to allocate memory for the result
*/
enum idmap_error_code sss_idmap_sid_to_dom_sid(struct sss_idmap_ctx *ctx,
const char *sid,
struct dom_sid **dom_sid);
/**
* @}
*/
#endif /* SSS_IDMAP_H_ */
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