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229 lines
6.9 KiB
C
229 lines
6.9 KiB
C
/*
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* acm.h: Xen access control module interface defintions
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Reiner Sailer <sailer@watson.ibm.com>
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* Copyright (c) 2005, International Business Machines Corporation.
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*/
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#ifndef _XEN_PUBLIC_ACM_H
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#define _XEN_PUBLIC_ACM_H
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#include "xen.h"
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/* if ACM_DEBUG defined, all hooks should
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* print a short trace message (comment it out
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* when not in testing mode )
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*/
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/* #define ACM_DEBUG */
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#ifdef ACM_DEBUG
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# define printkd(fmt, args...) printk(fmt,## args)
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#else
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# define printkd(fmt, args...)
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#endif
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/* default ssid reference value if not supplied */
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#define ACM_DEFAULT_SSID 0x0
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#define ACM_DEFAULT_LOCAL_SSID 0x0
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/* Internal ACM ERROR types */
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#define ACM_OK 0
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#define ACM_UNDEF -1
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#define ACM_INIT_SSID_ERROR -2
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#define ACM_INIT_SOID_ERROR -3
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#define ACM_ERROR -4
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/* External ACCESS DECISIONS */
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#define ACM_ACCESS_PERMITTED 0
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#define ACM_ACCESS_DENIED -111
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#define ACM_NULL_POINTER_ERROR -200
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/*
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Error codes reported in when trying to test for a new policy
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These error codes are reported in an array of tuples where
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each error code is followed by a parameter describing the error
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more closely, such as a domain id.
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*/
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#define ACM_EVTCHN_SHARING_VIOLATION 0x100
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#define ACM_GNTTAB_SHARING_VIOLATION 0x101
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#define ACM_DOMAIN_LOOKUP 0x102
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#define ACM_CHWALL_CONFLICT 0x103
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#define ACM_SSIDREF_IN_USE 0x104
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/* primary policy in lower 4 bits */
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#define ACM_NULL_POLICY 0
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#define ACM_CHINESE_WALL_POLICY 1
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#define ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY 2
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#define ACM_POLICY_UNDEFINED 15
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/* combinations have secondary policy component in higher 4bit */
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#define ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY \
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((ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY << 4) | ACM_CHINESE_WALL_POLICY)
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/* policy: */
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#define ACM_POLICY_NAME(X) \
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((X) == (ACM_NULL_POLICY)) ? "NULL" : \
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((X) == (ACM_CHINESE_WALL_POLICY)) ? "CHINESE WALL" : \
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((X) == (ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "SIMPLE TYPE ENFORCEMENT" : \
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((X) == (ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "CHINESE WALL AND SIMPLE TYPE ENFORCEMENT" : \
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"UNDEFINED"
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/* the following policy versions must be increased
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* whenever the interpretation of the related
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* policy's data structure changes
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*/
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#define ACM_POLICY_VERSION 3
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#define ACM_CHWALL_VERSION 1
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#define ACM_STE_VERSION 1
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/* defines a ssid reference used by xen */
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typedef uint32_t ssidref_t;
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/* hooks that are known to domains */
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#define ACMHOOK_none 0
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#define ACMHOOK_sharing 1
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/* -------security policy relevant type definitions-------- */
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/* type identifier; compares to "equal" or "not equal" */
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typedef uint16_t domaintype_t;
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/* CHINESE WALL POLICY DATA STRUCTURES
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*
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* current accumulated conflict type set:
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* When a domain is started and has a type that is in
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* a conflict set, the conflicting types are incremented in
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* the aggregate set. When a domain is destroyed, the
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* conflicting types to its type are decremented.
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* If a domain has multiple types, this procedure works over
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* all those types.
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*
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* conflict_aggregate_set[i] holds the number of
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* running domains that have a conflict with type i.
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*
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* running_types[i] holds the number of running domains
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* that include type i in their ssidref-referenced type set
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*
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* conflict_sets[i][j] is "0" if type j has no conflict
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* with type i and is "1" otherwise.
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*/
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/* high-16 = version, low-16 = check magic */
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#define ACM_MAGIC 0x0001debc
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/* each offset in bytes from start of the struct they
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* are part of */
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/* V3 of the policy buffer aded a version structure */
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struct acm_policy_version
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{
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uint32_t major;
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uint32_t minor;
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};
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/* each buffer consists of all policy information for
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* the respective policy given in the policy code
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*
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* acm_policy_buffer, acm_chwall_policy_buffer,
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* and acm_ste_policy_buffer need to stay 32-bit aligned
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* because we create binary policies also with external
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* tools that assume packed representations (e.g. the java tool)
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*/
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struct acm_policy_buffer {
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uint32_t policy_version; /* ACM_POLICY_VERSION */
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uint32_t magic;
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uint32_t len;
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uint32_t policy_reference_offset;
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uint32_t primary_policy_code;
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uint32_t primary_buffer_offset;
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uint32_t secondary_policy_code;
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uint32_t secondary_buffer_offset;
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struct acm_policy_version xml_pol_version; /* add in V3 */
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};
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struct acm_policy_reference_buffer {
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uint32_t len;
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};
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struct acm_chwall_policy_buffer {
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uint32_t policy_version; /* ACM_CHWALL_VERSION */
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uint32_t policy_code;
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uint32_t chwall_max_types;
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uint32_t chwall_max_ssidrefs;
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uint32_t chwall_max_conflictsets;
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uint32_t chwall_ssid_offset;
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uint32_t chwall_conflict_sets_offset;
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uint32_t chwall_running_types_offset;
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uint32_t chwall_conflict_aggregate_offset;
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};
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struct acm_ste_policy_buffer {
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uint32_t policy_version; /* ACM_STE_VERSION */
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uint32_t policy_code;
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uint32_t ste_max_types;
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uint32_t ste_max_ssidrefs;
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uint32_t ste_ssid_offset;
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};
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struct acm_stats_buffer {
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uint32_t magic;
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uint32_t len;
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uint32_t primary_policy_code;
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uint32_t primary_stats_offset;
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uint32_t secondary_policy_code;
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uint32_t secondary_stats_offset;
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};
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struct acm_ste_stats_buffer {
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uint32_t ec_eval_count;
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uint32_t gt_eval_count;
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uint32_t ec_denied_count;
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uint32_t gt_denied_count;
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uint32_t ec_cachehit_count;
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uint32_t gt_cachehit_count;
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};
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struct acm_ssid_buffer {
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uint32_t len;
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ssidref_t ssidref;
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uint32_t policy_reference_offset;
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uint32_t primary_policy_code;
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uint32_t primary_max_types;
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uint32_t primary_types_offset;
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uint32_t secondary_policy_code;
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uint32_t secondary_max_types;
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uint32_t secondary_types_offset;
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};
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#endif
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/*
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* Local variables:
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* mode: C
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* c-set-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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