module yuma-nacm {
yang-version 1;
namespace "http://netconfcentral.org/ns/yuma-nacm";
prefix "nacm";
import ietf-yang-types {
prefix "yang";
}
organization "Netconf Central";
contact
"Andy Bierman <andy@netconfcentral.org>.";
description "NETCONF Server Access Control Model";
revision "2010-02-21" {
description "Initial version (work-in-progress).";
}
typedef nacm-user-name {
type string {
length "1..64";
pattern
'[a-z,A-Z,_][a-z,A-Z,0-9,\-,_,@,.]{0,63}';
}
description "General Purpose User Name string.";
}
typedef nacm-rights {
type bits {
bit "read" {
position 0;
description
"Read access allowed to all specified data.
Any protocol operation or notification that
returns data to an application is a read
operation.";
}
bit "write" {
position 1;
description
"Write access allowed to all specified data.
Any protocol operation that alters a database
is a write operation.";
}
bit "exec" {
position 2;
description
"Execution access to the specified RPC operation.
Any RPC operation invocation is an exec operation.";
}
}
description "NETCONF Access Rights";
}
typedef nacm-group {
type identityref {
base nacm-groups;
}
description
"Type of administrative group that can be
assigned to the user, and specified in
an access control rule.
The identityref data type is used to allow as
many groups to be added as needed. There are
no standard semantics for each identity.
It simply represents a unique group name.";
}
typedef nacm-action {
type enumeration {
enum "permit" {
value 0;
description "Requested action is permitted.";
}
enum "deny" {
value 1;
description "Requested action is denied.";
}
}
description
"Action taken by the server when a particular
rule matches.";
}
typedef schema-instance-identifier {
type string;
description
"Path expression used to represent a special
schema-instance identifier string.
A schema-instance-identifier value string is an
unrestricted YANG instance-identifier expression.
All the same rules as an instance-identifier apply
except predicates for keys are optional. If a key
predicate is missing, then the schema-instance-identifier
represents all possible server instances for that key.";
}
extension secure {
description
"Used to indicate that the data model node
represents a sensitive security system parameter.
If present, the NETCONF server will only allow
the designated 'superuser' to have write or execute
default nacm-rights for the node. An explicit access
control rule is required for all other users.
The 'secure' extension may appear within a data, rpc,
or notification node definition. It is ignored
otherwise.";
}
extension very-secure {
description
"Used to indicate that the data model node
controls a very sensitive security system parameter.
If present, the NETCONF server will only allow
the designated 'superuser' to have read, write, or execute
default nacm-rights for the node. An explicit access
control rule is required for all other users.
The 'very-secure' extension may appear within a data, rpc,
or notification node definition. It is ignored
otherwise.";
}
identity nacm-groups {
description
"Root of all NETCONF Administrative Groups";
}
identity admin {
base nacm-groups;
description "Example Administrator group.";
}
identity monitor {
base nacm-groups;
description "Example Monitoring group.";
}
identity guest {
base nacm-groups;
description "Example Guest group.";
}
container nacm {
presence
"An empty nacm container indicates that the
NACM service is running, and possibly using
all default parameters.";
description
"Parameters for NETCONF Access Control Model.";
leaf enable-nacm {
type boolean;
default "true";
description
"Enable or disable all NETCONF access control
enforcement. If 'true', then enforcement
is enabled. If 'false', then enforcement
is disabled.";
}
leaf read-default {
type nacm-action;
default "permit";
description
"Controls whether read access is granted if
no appropriate rule is found for a
particular read request.";
}
leaf write-default {
type nacm-action;
default "deny";
description
"Controls whether write access is granted if
no appropriate rule is found for a
particular write request.";
}
leaf exec-default {
type nacm-action;
default "permit";
description
"Controls whether exec access is granted if
no appropriate rule is found for a
particular RPC operation request.";
}
leaf denied-rpcs {
type yang:zero-based-counter32;
config "false";
description
"Number of times an RPC operation request was denied";
}
leaf denied-data-writes {
type yang:zero-based-counter32;
config "false";
description
"Number of times a request to alter a data node
was denied.";
}
container groups {
description "NACM Group Table";
list group {
key "group-identity";
description "One NACM Group Entry";
leaf group-identity {
type nacm-group;
description
"Group identity associated with this entry.";
}
leaf-list user-name {
type nacm-user-name;
description
"Each entry identifies the user name of
a member of the group associated with
this entry.";
}
} // list group
} // container groups
container rules {
description "NETCONF Access Control Rules.";
grouping common-rule-parms {
leaf rule-name {
type string {
length "1..1023";
}
description
"Arbitrary name assigned to the
access control rule.";
}
leaf allowed-rights {
type nacm-rights;
mandatory "true";
description
"List of access rights granted to
specified administrative groups for the
content specified by the associated path.";
}
leaf-list allowed-group {
type nacm-group;
min-elements "1";
description
"List of administrative groups which will be
assigned the associated access rights
for the content specified by the associated
path.";
}
leaf comment {
type string {
length "0..4095";
}
description
"A textual description of the access rule.";
}
} // grouping common-rule-parms
list module-rule {
key "module-name rule-name";
ordered-by "user";
description
"One Module Access Rule.
Rules are processed in user-defined order.
A module rule is considered a match if
the XML namespace for the specified module
name matches the XML namespace used within
a NETCONF PDU, and the administrative group
associated with the requesting session is
specified in the 'allowed-group' leaf-list.";
leaf module-name {
type string {
length "1..max";
}
description
"Name of the module associated with
this rule.";
}
uses common-rule-parms;
} // list module-rule
list rpc-rule {
key "rpc-module-name rpc-name rule-name";
ordered-by "user";
description
"One RPC Operation Access Rule.
Rules are processed in user-defined order.
An RPC rule is considered a match if
the module name of the requested RPC
operation matches 'rpc-module-name',
the requested RPC operation matches
'rpc-name', and an administrative group
associated with the session user
is listed in the 'allowed-group'
leaf-list";
leaf rpc-module-name {
type string {
length "1..max";
}
description
"Name of the module defining this
RPC operation.";
}
leaf rpc-name {
type string {
length "1..max";
}
description "Name of the RPC operation.";
}
uses common-rule-parms;
} // list rpc-rule
list data-rule {
key "rule-name";
ordered-by "user";
description
"One Data Access Control Rule.
Rules are processed in user-defined order.
A data rule is considered to match when
the path expression identifies
the same node that is being accessed
in the NETCONF database, and the administrative
group associated with the session is identified
in the 'allowed-group' leaf-list.";
leaf path {
type schema-instance-identifier;
mandatory "true";
description
"Schema Instance Identifier associated with
the data node controlled by this rule.
Configuration data or state data
instance identifiers start with
a top-level data node.
A complete instance identifier is
required for this type of path value.
The special value '/' refers to all
possible database contents.";
}
uses common-rule-parms;
} // list data-rule
list notification-rule {
key "notification-module-name notification-name rule-name";
ordered-by "user";
description
"One Notification Access Rule.
A notification is considered a match if
the module name of the requested
event type matches 'notification-module-name',
the requested event type matches the
'notification-name', and the administrative group
associated with the requesting session
is listed in the 'allowed-group' leaf-list.";
leaf notification-module-name {
type string {
length "1..max";
}
description
"Name of the module defining this
notification event type.";
}
leaf notification-name {
type string {
length "1..max";
}
description "Name of the notification event.";
}
uses common-rule-parms;
} // list notification-rule
} // container rules
nacm:very-secure;
} // container nacm
} // module yuma-nacm
