diff options
Diffstat (limited to 'libsubid')
| -rw-r--r-- | libsubid/Makefile.am | 30 | ||||
| -rw-r--r-- | libsubid/Makefile.in | 764 | ||||
| -rw-r--r-- | libsubid/api.c | 108 | ||||
| -rw-r--r-- | libsubid/subid.h | 163 | ||||
| -rw-r--r-- | libsubid/subid.h.in | 163 |
5 files changed, 1228 insertions, 0 deletions
diff --git a/libsubid/Makefile.am b/libsubid/Makefile.am new file mode 100644 index 0000000..09ec341 --- /dev/null +++ b/libsubid/Makefile.am @@ -0,0 +1,30 @@ +lib_LTLIBRARIES = libsubid.la +libsubid_la_SOURCES = api.c +libsubid_la_LDFLAGS = -version-info @LIBSUBID_ABI_MAJOR@ -export-symbols-regex '^subid_' + +pkginclude_HEADERS = subid.h + +MISCLIBS = \ + $(LIBAUDIT) \ + $(LIBSELINUX) \ + $(LIBSEMANAGE) \ + $(LIBCRACK) \ + $(LIBCRYPT_NOPAM) \ + $(LIBSKEY) \ + $(LIBMD) \ + $(LIBECONF) \ + $(LIBCRYPT) \ + $(LIBACL) \ + $(LIBATTR) \ + $(LIBTCB) \ + $(LIBPAM) + +libsubid_la_LIBADD = \ + $(top_builddir)/lib/libshadow.la \ + $(top_builddir)/libmisc/libmisc.la \ + $(MISCLIBS) -ldl + +AM_CPPFLAGS = \ + -I${top_srcdir}/lib \ + -I${top_srcdir}/libmisc \ + -DLOCALEDIR=\"$(datadir)/locale\" diff --git a/libsubid/Makefile.in b/libsubid/Makefile.in new file mode 100644 index 0000000..ed8dc94 --- /dev/null +++ b/libsubid/Makefile.in @@ -0,0 +1,764 @@ +# Makefile.in generated by automake 1.16.5 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2021 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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+ * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <config.h> +#include <fcntl.h> +#include <stdio.h> +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <pwd.h> +#include <stdbool.h> +#include "subordinateio.h" +#include "idmapping.h" +#include "subid.h" +#include "shadowlog.h" + +bool subid_init(const char *progname, FILE * logfd) +{ + FILE *shadow_logfd; + if (progname) { + progname = strdup(progname); + if (!progname) + return false; + log_set_progname(progname); + } else { + log_set_progname("(libsubid)"); + } + + if (logfd) { + log_set_logfd(logfd); + return true; + } + shadow_logfd = fopen("/dev/null", "w"); + if (!shadow_logfd) { + log_set_logfd(stderr); + return false; + } + log_set_logfd(shadow_logfd); + return true; +} + +static +int get_subid_ranges(const char *owner, enum subid_type id_type, struct subid_range **ranges) +{ + return list_owner_ranges(owner, id_type, ranges); +} + +int subid_get_uid_ranges(const char *owner, struct subid_range **ranges) +{ + return get_subid_ranges(owner, ID_TYPE_UID, ranges); +} + +int subid_get_gid_ranges(const char *owner, struct subid_range **ranges) +{ + return get_subid_ranges(owner, ID_TYPE_GID, ranges); +} + +static +int get_subid_owner(unsigned long id, enum subid_type id_type, uid_t **owner) +{ + return find_subid_owners(id, id_type, owner); +} + +int subid_get_uid_owners(uid_t uid, uid_t **owner) +{ + return get_subid_owner((unsigned long)uid, ID_TYPE_UID, owner); +} + +int subid_get_gid_owners(gid_t gid, uid_t **owner) +{ + return get_subid_owner((unsigned long)gid, ID_TYPE_GID, owner); +} + +static +bool grant_subid_range(struct subordinate_range *range, bool reuse, + enum subid_type id_type) +{ + return new_subid_range(range, id_type, reuse); +} + +bool subid_grant_uid_range(struct subordinate_range *range, bool reuse) +{ + return grant_subid_range(range, reuse, ID_TYPE_UID); +} + +bool subid_grant_gid_range(struct subordinate_range *range, bool reuse) +{ + return grant_subid_range(range, reuse, ID_TYPE_GID); +} + +static +bool ungrant_subid_range(struct subordinate_range *range, enum subid_type id_type) +{ + return release_subid_range(range, id_type); +} + +bool subid_ungrant_uid_range(struct subordinate_range *range) +{ + return ungrant_subid_range(range, ID_TYPE_UID); +} + +bool subid_ungrant_gid_range(struct subordinate_range *range) +{ + return ungrant_subid_range(range, ID_TYPE_GID); +} diff --git a/libsubid/subid.h b/libsubid/subid.h new file mode 100644 index 0000000..d13ee84 --- /dev/null +++ b/libsubid/subid.h @@ -0,0 +1,163 @@ +#include <sys/types.h> +#include <stdio.h> +#include <stdbool.h> + +#ifndef SUBID_RANGE_DEFINED +#define SUBID_RANGE_DEFINED 1 +#define SUBID_ABI_VERSION 4.0.0 +#define SUBID_ABI_MAJOR 4 +#define SUBID_ABI_MINOR 0 +#define SUBID_ABI_MICRO 0 + +/* subid_range is just a starting point and size of a range */ +struct subid_range { + unsigned long start; + unsigned long count; +}; + +/* subordinage_range is a subid_range plus an owner, representing + * a range in /etc/subuid or /etc/subgid */ +struct subordinate_range { + const char *owner; + unsigned long start; + unsigned long count; +}; + +enum subid_type { + ID_TYPE_UID = 1, + ID_TYPE_GID = 2 +}; + +enum subid_status { + SUBID_STATUS_SUCCESS = 0, + SUBID_STATUS_UNKNOWN_USER = 1, + SUBID_STATUS_ERROR_CONN = 2, + SUBID_STATUS_ERROR = 3, +}; + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * subid_init: initialize libsubid + * + * @progname: Name to display as program. If NULL, then "(libsubid)" will be + * shown in error messages. + * @logfd: Open file pointer to pass error messages to. If NULL, then + * /dev/null will be opened and messages will be sent there. The + * default if libsubid_init() is not called is stderr (2). + * + * This function does not need to be called. If not called, then the defaults + * will be used. + * + * Returns false if an error occurred. + */ +bool subid_init(const char *progname, FILE *logfd); + +/* + * subid_get_uid_ranges: return a list of UID ranges for a user + * + * @owner: username being queried + * @ranges: a pointer to an array of subid_range structs in which the result + * will be returned. + * + * The caller must free(ranges) when done. + * + * returns: number of ranges found, ir < 0 on error. + */ +int subid_get_uid_ranges(const char *owner, struct subid_range **ranges); + +/* + * subid_get_gid_ranges: return a list of GID ranges for a user + * + * @owner: username being queried + * @ranges: a pointer to an array of subid_range structs in which the result + * will be returned. + * + * The caller must free(ranges) when done. + * + * returns: number of ranges found, ir < 0 on error. + */ +int subid_get_gid_ranges(const char *owner, struct subid_range **ranges); + +/* + * subid_get_uid_owners: return a list of uids to which the given uid has been + * delegated. + * + * @uid: The subuid being queried + * @owners: a pointer to an array of uids into which the results are placed. + * The returned array must be freed by the caller. + * + * Returns the number of uids returned, or < 0 on error. + */ +int subid_get_uid_owners(uid_t uid, uid_t **owner); + +/* + * subid_get_gid_owners: return a list of uids to which the given gid has been + * delegated. + * + * @uid: The subgid being queried + * @owners: a pointer to an array of uids into which the results are placed. + * The returned array must be freed by the caller. + * + * Returns the number of uids returned, or < 0 on error. + */ +int subid_get_gid_owners(gid_t gid, uid_t **owner); + +/* + * subid_grant_uid_range: assign a subuid range to a user + * + * @range: pointer to a struct subordinate_range detailing the UID range + * to allocate. ->owner must be the username, and ->count must be + * filled in. ->start is ignored, and will contain the start + * of the newly allocated range, upon success. + * + * Returns true if the delegation succeeded, false otherwise. If true, + * then the range from (range->start, range->start + range->count) will + * be delegated to range->owner. + */ +bool subid_grant_uid_range(struct subordinate_range *range, bool reuse); + +/* + * subid_grant_gid_range: assign a subgid range to a user + * + * @range: pointer to a struct subordinate_range detailing the GID range + * to allocate. ->owner must be the username, and ->count must be + * filled in. ->start is ignored, and will contain the start + * of the newly allocated range, upon success. + * + * Returns true if the delegation succeeded, false otherwise. If true, + * then the range from (range->start, range->start + range->count) will + * be delegated to range->owner. + */ +bool subid_grant_gid_range(struct subordinate_range *range, bool reuse); + +/* + * subid_ungrant_uid_range: remove a subuid allocation. + * + * @range: pointer to a struct subordinate_range detailing the UID allocation + * to remove. + * + * Returns true if successful, false if it failed, for instance if the + * delegation did not exist. + */ +bool subid_ungrant_uid_range(struct subordinate_range *range); + +/* + * subid_ungrant_gid_range: remove a subgid allocation. + * + * @range: pointer to a struct subordinate_range detailing the GID allocation + * to remove. + * + * Returns true if successful, false if it failed, for instance if the + * delegation did not exist. + */ +bool subid_ungrant_gid_range(struct subordinate_range *range); + +#ifdef __cplusplus +} +#endif + +#define SUBID_NFIELDS 3 +#endif diff --git a/libsubid/subid.h.in b/libsubid/subid.h.in new file mode 100644 index 0000000..79744ed --- /dev/null +++ b/libsubid/subid.h.in @@ -0,0 +1,163 @@ +#include <sys/types.h> +#include <stdio.h> +#include <stdbool.h> + +#ifndef SUBID_RANGE_DEFINED +#define SUBID_RANGE_DEFINED 1 +#define SUBID_ABI_VERSION @LIBSUBID_ABI_MAJOR@.@LIBSUBID_ABI_MINOR@.@LIBSUBID_ABI_MICRO@ +#define SUBID_ABI_MAJOR @LIBSUBID_ABI_MAJOR@ +#define SUBID_ABI_MINOR @LIBSUBID_ABI_MINOR@ +#define SUBID_ABI_MICRO @LIBSUBID_ABI_MICRO@ + +/* subid_range is just a starting point and size of a range */ +struct subid_range { + unsigned long start; + unsigned long count; +}; + +/* subordinage_range is a subid_range plus an owner, representing + * a range in /etc/subuid or /etc/subgid */ +struct subordinate_range { + const char *owner; + unsigned long start; + unsigned long count; +}; + +enum subid_type { + ID_TYPE_UID = 1, + ID_TYPE_GID = 2 +}; + +enum subid_status { + SUBID_STATUS_SUCCESS = 0, + SUBID_STATUS_UNKNOWN_USER = 1, + SUBID_STATUS_ERROR_CONN = 2, + SUBID_STATUS_ERROR = 3, +}; + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * subid_init: initialize libsubid + * + * @progname: Name to display as program. If NULL, then "(libsubid)" will be + * shown in error messages. + * @logfd: Open file pointer to pass error messages to. If NULL, then + * /dev/null will be opened and messages will be sent there. The + * default if libsubid_init() is not called is stderr (2). + * + * This function does not need to be called. If not called, then the defaults + * will be used. + * + * Returns false if an error occurred. + */ +bool subid_init(const char *progname, FILE *logfd); + +/* + * subid_get_uid_ranges: return a list of UID ranges for a user + * + * @owner: username being queried + * @ranges: a pointer to an array of subid_range structs in which the result + * will be returned. + * + * The caller must free(ranges) when done. + * + * returns: number of ranges found, ir < 0 on error. + */ +int subid_get_uid_ranges(const char *owner, struct subid_range **ranges); + +/* + * subid_get_gid_ranges: return a list of GID ranges for a user + * + * @owner: username being queried + * @ranges: a pointer to an array of subid_range structs in which the result + * will be returned. + * + * The caller must free(ranges) when done. + * + * returns: number of ranges found, ir < 0 on error. + */ +int subid_get_gid_ranges(const char *owner, struct subid_range **ranges); + +/* + * subid_get_uid_owners: return a list of uids to which the given uid has been + * delegated. + * + * @uid: The subuid being queried + * @owners: a pointer to an array of uids into which the results are placed. + * The returned array must be freed by the caller. + * + * Returns the number of uids returned, or < 0 on error. + */ +int subid_get_uid_owners(uid_t uid, uid_t **owner); + +/* + * subid_get_gid_owners: return a list of uids to which the given gid has been + * delegated. + * + * @uid: The subgid being queried + * @owners: a pointer to an array of uids into which the results are placed. + * The returned array must be freed by the caller. + * + * Returns the number of uids returned, or < 0 on error. + */ +int subid_get_gid_owners(gid_t gid, uid_t **owner); + +/* + * subid_grant_uid_range: assign a subuid range to a user + * + * @range: pointer to a struct subordinate_range detailing the UID range + * to allocate. ->owner must be the username, and ->count must be + * filled in. ->start is ignored, and will contain the start + * of the newly allocated range, upon success. + * + * Returns true if the delegation succeeded, false otherwise. If true, + * then the range from (range->start, range->start + range->count) will + * be delegated to range->owner. + */ +bool subid_grant_uid_range(struct subordinate_range *range, bool reuse); + +/* + * subid_grant_gid_range: assign a subgid range to a user + * + * @range: pointer to a struct subordinate_range detailing the GID range + * to allocate. ->owner must be the username, and ->count must be + * filled in. ->start is ignored, and will contain the start + * of the newly allocated range, upon success. + * + * Returns true if the delegation succeeded, false otherwise. If true, + * then the range from (range->start, range->start + range->count) will + * be delegated to range->owner. + */ +bool subid_grant_gid_range(struct subordinate_range *range, bool reuse); + +/* + * subid_ungrant_uid_range: remove a subuid allocation. + * + * @range: pointer to a struct subordinate_range detailing the UID allocation + * to remove. + * + * Returns true if successful, false if it failed, for instance if the + * delegation did not exist. + */ +bool subid_ungrant_uid_range(struct subordinate_range *range); + +/* + * subid_ungrant_gid_range: remove a subgid allocation. + * + * @range: pointer to a struct subordinate_range detailing the GID allocation + * to remove. + * + * Returns true if successful, false if it failed, for instance if the + * delegation did not exist. + */ +bool subid_ungrant_gid_range(struct subordinate_range *range); + +#ifdef __cplusplus +} +#endif + +#define SUBID_NFIELDS 3 +#endif |