diff --git a/include/net/calipso.h b/include/net/calipso.h new file mode 100644 index 000000000000..38dbb4707150 --- /dev/null +++ b/include/net/calipso.h @@ -0,0 +1,79 @@ +/* + * CALIPSO - Common Architecture Label IPv6 Security Option + * + * This is an implementation of the CALIPSO protocol as specified in + * RFC 5570. + * + * Authors: Paul Moore + * Huw Davies + * + */ + +/* + * (c) Copyright Hewlett-Packard Development Company, L.P., 2006 + * (c) Copyright Huw Davies , 2015 + * + * 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 2 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 . + * + */ + +#ifndef _CALIPSO_H +#define _CALIPSO_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* known doi values */ +#define CALIPSO_DOI_UNKNOWN 0x00000000 + +/* doi mapping types */ +#define CALIPSO_MAP_UNKNOWN 0 +#define CALIPSO_MAP_PASS 2 + +/* + * CALIPSO DOI definitions + */ + +/* DOI definition struct */ +struct calipso_doi { + u32 doi; + u32 type; + + atomic_t refcount; + struct list_head list; + struct rcu_head rcu; +}; + +#ifdef CONFIG_NETLABEL +int __init calipso_init(void); +void calipso_exit(void); +#else +static inline int __init calipso_init(void) +{ + return 0; +} + +static inline void calipso_exit(void) +{ +} +#endif /* CONFIG_NETLABEL */ + +#endif /* _CALIPSO_H */ diff --git a/include/net/netlabel.h b/include/net/netlabel.h index 7b5a300de7f5..6af1bb6df4ab 100644 --- a/include/net/netlabel.h +++ b/include/net/netlabel.h @@ -40,6 +40,7 @@ #include struct cipso_v4_doi; +struct calipso_doi; /* * NetLabel - A management interface for maintaining network packet label @@ -94,6 +95,8 @@ struct cipso_v4_doi; #define NETLBL_NLTYPE_UNLABELED_NAME "NLBL_UNLBL" #define NETLBL_NLTYPE_ADDRSELECT 6 #define NETLBL_NLTYPE_ADDRSELECT_NAME "NLBL_ADRSEL" +#define NETLBL_NLTYPE_CALIPSO 7 +#define NETLBL_NLTYPE_CALIPSO_NAME "NLBL_CALIPSO" /* * NetLabel - Kernel API for accessing the network packet label mappings. @@ -216,6 +219,23 @@ struct netlbl_lsm_secattr { } attr; }; +/** + * struct netlbl_calipso_ops - NetLabel CALIPSO operations + * @doi_add: add a CALIPSO DOI + * @doi_free: free a CALIPSO DOI + * + * Description: + * This structure is filled out by the CALIPSO engine and passed + * to the NetLabel core via a call to netlbl_calipso_ops_register(). + * It enables the CALIPSO engine (and hence IPv6) to be compiled + * as a module. + */ +struct netlbl_calipso_ops { + int (*doi_add)(struct calipso_doi *doi_def, + struct netlbl_audit *audit_info); + void (*doi_free)(struct calipso_doi *doi_def); +}; + /* * LSM security attribute operations (inline) */ @@ -598,4 +618,7 @@ static inline struct audit_buffer *netlbl_audit_start(int type, } #endif /* CONFIG_NETLABEL */ +const struct netlbl_calipso_ops * +netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops); + #endif /* _NETLABEL_H */ diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index d820aa979620..82e8aa59446b 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -130,6 +130,8 @@ #define AUDIT_MAC_IPSEC_EVENT 1415 /* Audit an IPSec event */ #define AUDIT_MAC_UNLBL_STCADD 1416 /* NetLabel: add a static label */ #define AUDIT_MAC_UNLBL_STCDEL 1417 /* NetLabel: del a static label */ +#define AUDIT_MAC_CALIPSO_ADD 1418 /* NetLabel: add CALIPSO DOI entry */ +#define AUDIT_MAC_CALIPSO_DEL 1419 /* NetLabel: del CALIPSO DOI entry */ #define AUDIT_FIRST_KERN_ANOM_MSG 1700 #define AUDIT_LAST_KERN_ANOM_MSG 1799 diff --git a/net/ipv6/Makefile b/net/ipv6/Makefile index 2fbd90bf8d33..88ad4477705c 100644 --- a/net/ipv6/Makefile +++ b/net/ipv6/Makefile @@ -21,6 +21,7 @@ ipv6-$(CONFIG_NETFILTER) += netfilter.o ipv6-$(CONFIG_IPV6_MULTIPLE_TABLES) += fib6_rules.o ipv6-$(CONFIG_PROC_FS) += proc.o ipv6-$(CONFIG_SYN_COOKIES) += syncookies.o +ipv6-$(CONFIG_NETLABEL) += calipso.o ipv6-objs += $(ipv6-y) diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index b11c37cfd67c..c241c1805728 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -60,6 +60,7 @@ #ifdef CONFIG_IPV6_TUNNEL #include #endif +#include #include #include @@ -970,6 +971,10 @@ static int __init inet6_init(void) if (err) goto pingv6_fail; + err = calipso_init(); + if (err) + goto calipso_fail; + #ifdef CONFIG_SYSCTL err = ipv6_sysctl_register(); if (err) @@ -980,8 +985,10 @@ static int __init inet6_init(void) #ifdef CONFIG_SYSCTL sysctl_fail: - pingv6_exit(); + calipso_exit(); #endif +calipso_fail: + pingv6_exit(); pingv6_fail: ipv6_packet_cleanup(); ipv6_packet_fail: diff --git a/net/ipv6/calipso.c b/net/ipv6/calipso.c new file mode 100644 index 000000000000..aa44310120be --- /dev/null +++ b/net/ipv6/calipso.c @@ -0,0 +1,169 @@ +/* + * CALIPSO - Common Architecture Label IPv6 Security Option + * + * This is an implementation of the CALIPSO protocol as specified in + * RFC 5570. + * + * Authors: Paul Moore + * Huw Davies + * + */ + +/* (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 + * (c) Copyright Huw Davies , 2015 + * + * 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 2 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 . + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* List of available DOI definitions */ +static DEFINE_SPINLOCK(calipso_doi_list_lock); +static LIST_HEAD(calipso_doi_list); + +/* DOI List Functions + */ + +/** + * calipso_doi_search - Searches for a DOI definition + * @doi: the DOI to search for + * + * Description: + * Search the DOI definition list for a DOI definition with a DOI value that + * matches @doi. The caller is responsible for calling rcu_read_[un]lock(). + * Returns a pointer to the DOI definition on success and NULL on failure. + */ +static struct calipso_doi *calipso_doi_search(u32 doi) +{ + struct calipso_doi *iter; + + list_for_each_entry_rcu(iter, &calipso_doi_list, list) + if (iter->doi == doi && atomic_read(&iter->refcount)) + return iter; + return NULL; +} + +/** + * calipso_doi_add - Add a new DOI to the CALIPSO protocol engine + * @doi_def: the DOI structure + * @audit_info: NetLabel audit information + * + * Description: + * The caller defines a new DOI for use by the CALIPSO engine and calls this + * function to add it to the list of acceptable domains. The caller must + * ensure that the mapping table specified in @doi_def->map meets all of the + * requirements of the mapping type (see calipso.h for details). Returns + * zero on success and non-zero on failure. + * + */ +static int calipso_doi_add(struct calipso_doi *doi_def, + struct netlbl_audit *audit_info) +{ + int ret_val = -EINVAL; + u32 doi; + u32 doi_type; + struct audit_buffer *audit_buf; + + doi = doi_def->doi; + doi_type = doi_def->type; + + if (doi_def->doi == CALIPSO_DOI_UNKNOWN) + goto doi_add_return; + + atomic_set(&doi_def->refcount, 1); + + spin_lock(&calipso_doi_list_lock); + if (calipso_doi_search(doi_def->doi)) { + spin_unlock(&calipso_doi_list_lock); + ret_val = -EEXIST; + goto doi_add_return; + } + list_add_tail_rcu(&doi_def->list, &calipso_doi_list); + spin_unlock(&calipso_doi_list_lock); + ret_val = 0; + +doi_add_return: + audit_buf = netlbl_audit_start(AUDIT_MAC_CALIPSO_ADD, audit_info); + if (audit_buf) { + const char *type_str; + + switch (doi_type) { + case CALIPSO_MAP_PASS: + type_str = "pass"; + break; + default: + type_str = "(unknown)"; + } + audit_log_format(audit_buf, + " calipso_doi=%u calipso_type=%s res=%u", + doi, type_str, ret_val == 0 ? 1 : 0); + audit_log_end(audit_buf); + } + + return ret_val; +} + +/** + * calipso_doi_free - Frees a DOI definition + * @doi_def: the DOI definition + * + * Description: + * This function frees all of the memory associated with a DOI definition. + * + */ +static void calipso_doi_free(struct calipso_doi *doi_def) +{ + kfree(doi_def); +} + +static const struct netlbl_calipso_ops ops = { + .doi_add = calipso_doi_add, + .doi_free = calipso_doi_free, +}; + +/** + * calipso_init - Initialize the CALIPSO module + * + * Description: + * Initialize the CALIPSO module and prepare it for use. Returns zero on + * success and negative values on failure. + * + */ +int __init calipso_init(void) +{ + netlbl_calipso_ops_register(&ops); + return 0; +} + +void calipso_exit(void) +{ + netlbl_calipso_ops_register(NULL); +} diff --git a/net/netlabel/Makefile b/net/netlabel/Makefile index d2732fc952e2..d341ede0dca5 100644 --- a/net/netlabel/Makefile +++ b/net/netlabel/Makefile @@ -12,4 +12,4 @@ obj-y += netlabel_mgmt.o # protocol modules obj-y += netlabel_unlabeled.o obj-y += netlabel_cipso_v4.o - +obj-$(subst m,y,$(CONFIG_IPV6)) += netlabel_calipso.o diff --git a/net/netlabel/netlabel_calipso.c b/net/netlabel/netlabel_calipso.c new file mode 100644 index 000000000000..8a113f91b7a1 --- /dev/null +++ b/net/netlabel/netlabel_calipso.c @@ -0,0 +1,216 @@ +/* + * NetLabel CALIPSO/IPv6 Support + * + * This file defines the CALIPSO/IPv6 functions for the NetLabel system. The + * NetLabel system manages static and dynamic label mappings for network + * protocols such as CIPSO and CALIPSO. + * + * Authors: Paul Moore + * Huw Davies + * + */ + +/* (c) Copyright Hewlett-Packard Development Company, L.P., 2006 + * (c) Copyright Huw Davies , 2015 + * + * 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 2 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 . + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "netlabel_user.h" +#include "netlabel_calipso.h" +#include "netlabel_mgmt.h" +#include "netlabel_domainhash.h" + +/* NetLabel Generic NETLINK CALIPSO family */ +static struct genl_family netlbl_calipso_gnl_family = { + .id = GENL_ID_GENERATE, + .hdrsize = 0, + .name = NETLBL_NLTYPE_CALIPSO_NAME, + .version = NETLBL_PROTO_VERSION, + .maxattr = NLBL_CALIPSO_A_MAX, +}; + +/* NetLabel Netlink attribute policy */ +static const struct nla_policy calipso_genl_policy[NLBL_CALIPSO_A_MAX + 1] = { + [NLBL_CALIPSO_A_DOI] = { .type = NLA_U32 }, + [NLBL_CALIPSO_A_MTYPE] = { .type = NLA_U32 }, +}; + +/* NetLabel Command Handlers + */ +/** + * netlbl_calipso_add_pass - Adds a CALIPSO pass DOI definition + * @info: the Generic NETLINK info block + * @audit_info: NetLabel audit information + * + * Description: + * Create a new CALIPSO_MAP_PASS DOI definition based on the given ADD message + * and add it to the CALIPSO engine. Return zero on success and non-zero on + * error. + * + */ +static int netlbl_calipso_add_pass(struct genl_info *info, + struct netlbl_audit *audit_info) +{ + int ret_val; + struct calipso_doi *doi_def = NULL; + + doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); + if (!doi_def) + return -ENOMEM; + doi_def->type = CALIPSO_MAP_PASS; + doi_def->doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); + ret_val = calipso_doi_add(doi_def, audit_info); + if (ret_val != 0) + calipso_doi_free(doi_def); + + return ret_val; +} + +/** + * netlbl_calipso_add - Handle an ADD message + * @skb: the NETLINK buffer + * @info: the Generic NETLINK info block + * + * Description: + * Create a new DOI definition based on the given ADD message and add it to the + * CALIPSO engine. Returns zero on success, negative values on failure. + * + */ +static int netlbl_calipso_add(struct sk_buff *skb, struct genl_info *info) + +{ + int ret_val = -EINVAL; + struct netlbl_audit audit_info; + + if (!info->attrs[NLBL_CALIPSO_A_DOI] || + !info->attrs[NLBL_CALIPSO_A_MTYPE]) + return -EINVAL; + + netlbl_netlink_auditinfo(skb, &audit_info); + switch (nla_get_u32(info->attrs[NLBL_CALIPSO_A_MTYPE])) { + case CALIPSO_MAP_PASS: + ret_val = netlbl_calipso_add_pass(info, &audit_info); + break; + } + if (ret_val == 0) + atomic_inc(&netlabel_mgmt_protocount); + + return ret_val; +} + +/* NetLabel Generic NETLINK Command Definitions + */ + +static const struct genl_ops netlbl_calipso_ops[] = { + { + .cmd = NLBL_CALIPSO_C_ADD, + .flags = GENL_ADMIN_PERM, + .policy = calipso_genl_policy, + .doit = netlbl_calipso_add, + .dumpit = NULL, + }, +}; + +/* NetLabel Generic NETLINK Protocol Functions + */ + +/** + * netlbl_calipso_genl_init - Register the CALIPSO NetLabel component + * + * Description: + * Register the CALIPSO packet NetLabel component with the Generic NETLINK + * mechanism. Returns zero on success, negative values on failure. + * + */ +int __init netlbl_calipso_genl_init(void) +{ + return genl_register_family_with_ops(&netlbl_calipso_gnl_family, + netlbl_calipso_ops); +} + +static const struct netlbl_calipso_ops *calipso_ops; + +/** + * netlbl_calipso_ops_register - Register the CALIPSO operations + * + * Description: + * Register the CALIPSO packet engine operations. + * + */ +const struct netlbl_calipso_ops * +netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops) +{ + return xchg(&calipso_ops, ops); +} +EXPORT_SYMBOL(netlbl_calipso_ops_register); + +static const struct netlbl_calipso_ops *netlbl_calipso_ops_get(void) +{ + return ACCESS_ONCE(calipso_ops); +} + +/** + * calipso_doi_add - Add a new DOI to the CALIPSO protocol engine + * @doi_def: the DOI structure + * @audit_info: NetLabel audit information + * + * Description: + * The caller defines a new DOI for use by the CALIPSO engine and calls this + * function to add it to the list of acceptable domains. The caller must + * ensure that the mapping table specified in @doi_def->map meets all of the + * requirements of the mapping type (see calipso.h for details). Returns + * zero on success and non-zero on failure. + * + */ +int calipso_doi_add(struct calipso_doi *doi_def, + struct netlbl_audit *audit_info) +{ + int ret_val = -ENOMSG; + const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); + + if (ops) + ret_val = ops->doi_add(doi_def, audit_info); + return ret_val; +} + +/** + * calipso_doi_free - Frees a DOI definition + * @doi_def: the DOI definition + * + * Description: + * This function frees all of the memory associated with a DOI definition. + * + */ +void calipso_doi_free(struct calipso_doi *doi_def) +{ + const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); + + if (ops) + ops->doi_free(doi_def); +} diff --git a/net/netlabel/netlabel_calipso.h b/net/netlabel/netlabel_calipso.h new file mode 100644 index 000000000000..f78790a6ce4f --- /dev/null +++ b/net/netlabel/netlabel_calipso.h @@ -0,0 +1,90 @@ +/* + * NetLabel CALIPSO Support + * + * This file defines the CALIPSO functions for the NetLabel system. The + * NetLabel system manages static and dynamic label mappings for network + * protocols such as CIPSO and RIPSO. + * + * Authors: Paul Moore + * Huw Davies + * + */ + +/* (c) Copyright Hewlett-Packard Development Company, L.P., 2006 + * (c) Copyright Huw Davies , 2015 + * + * 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 2 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 . + * + */ + +#ifndef _NETLABEL_CALIPSO +#define _NETLABEL_CALIPSO + +#include +#include + +/* The following NetLabel payloads are supported by the CALIPSO subsystem. + * + * o ADD: + * Sent by an application to add a new DOI mapping table. + * + * Required attributes: + * + * NLBL_CALIPSO_A_DOI + * NLBL_CALIPSO_A_MTYPE + * + * If using CALIPSO_MAP_PASS no additional attributes are required. + * + */ + +/* NetLabel CALIPSO commands */ +enum { + NLBL_CALIPSO_C_UNSPEC, + NLBL_CALIPSO_C_ADD, + NLBL_CALIPSO_C_REMOVE, + NLBL_CALIPSO_C_LIST, + NLBL_CALIPSO_C_LISTALL, + __NLBL_CALIPSO_C_MAX, +}; + +/* NetLabel CALIPSO attributes */ +enum { + NLBL_CALIPSO_A_UNSPEC, + NLBL_CALIPSO_A_DOI, + /* (NLA_U32) + * the DOI value */ + NLBL_CALIPSO_A_MTYPE, + /* (NLA_U32) + * the mapping table type (defined in the calipso.h header as + * CALIPSO_MAP_*) */ + __NLBL_CALIPSO_A_MAX, +}; + +#define NLBL_CALIPSO_A_MAX (__NLBL_CALIPSO_A_MAX - 1) + +/* NetLabel protocol functions */ +#if IS_ENABLED(CONFIG_IPV6) +int netlbl_calipso_genl_init(void); +#else +static inline int netlbl_calipso_genl_init(void) +{ + return 0; +} +#endif + +int calipso_doi_add(struct calipso_doi *doi_def, + struct netlbl_audit *audit_info); +void calipso_doi_free(struct calipso_doi *doi_def); + +#endif diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c index 7e2a68f9d165..8d2e483167a8 100644 --- a/net/netlabel/netlabel_kapi.c +++ b/net/netlabel/netlabel_kapi.c @@ -1170,6 +1170,7 @@ struct audit_buffer *netlbl_audit_start(int type, { return netlbl_audit_start_common(type, audit_info); } +EXPORT_SYMBOL(netlbl_audit_start); /* * Setup Functions diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c index b2aeb5d44601..975b1e93271e 100644 --- a/net/netlabel/netlabel_mgmt.c +++ b/net/netlabel/netlabel_mgmt.c @@ -674,6 +674,15 @@ static int netlbl_mgmt_protocols(struct sk_buff *skb, goto protocols_return; protos_sent++; } +#if IS_ENABLED(CONFIG_IPV6) + if (protos_sent == 2) { + if (netlbl_mgmt_protocols_cb(skb, + cb, + NETLBL_NLTYPE_CALIPSO) < 0) + goto protocols_return; + protos_sent++; + } +#endif protocols_return: cb->args[0] = protos_sent; diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c index adf8b7900da2..58495f44c62a 100644 --- a/net/netlabel/netlabel_user.c +++ b/net/netlabel/netlabel_user.c @@ -44,6 +44,7 @@ #include "netlabel_mgmt.h" #include "netlabel_unlabeled.h" #include "netlabel_cipso_v4.h" +#include "netlabel_calipso.h" #include "netlabel_user.h" /* @@ -71,6 +72,10 @@ int __init netlbl_netlink_init(void) if (ret_val != 0) return ret_val; + ret_val = netlbl_calipso_genl_init(); + if (ret_val != 0) + return ret_val; + return netlbl_unlabel_genl_init(); }