syntax = "proto3";

package identity;

import "google/protobuf/timestamp.proto";

// Group represents an identity group.
message Group {
	// ID is the unique identifier for this group
	string id = 1;

	// Name is the unique name for this group
	string name = 2;

	// Policies are the vault policies to be granted to members of this group
	repeated string policies = 3;

	// ParentGroupIDs are the identifiers of those groups to which this group is a
	// member of. These will serve as references to the parent group in the
	// hierarchy.
	repeated string parent_group_ids = 4;

	// MemberEntityIDs are the identifiers of entities which are members of this
	// group
	repeated string member_entity_ids = 5;

	// Metadata represents the custom data tied with this group
	map<string, string> metadata = 6;

	// CreationTime is the time at which this group was created
	google.protobuf.Timestamp creation_time = 7;

	// LastUpdateTime is the time at which this group was last modified
	google.protobuf.Timestamp last_update_time= 8;

	// ModifyIndex tracks the number of updates to the group. It is useful to detect
	// updates to the groups.
	uint64 modify_index = 9;

	// BucketKeyHash is the MD5 hash of the storage bucket key into which this
	// group is stored in the underlying storage. This is useful to find all
	// the groups belonging to a particular bucket during invalidation of the
	// storage key.
	string bucket_key_hash = 10;
}


// Entity represents an entity that gets persisted and indexed.
// Entity is fundamentally composed of zero or many aliases.
message Entity {
	// Aliases are the identities that this entity is made of. This can be
	// empty as well to favor being able to create the entity first and then
	// incrementally adding aliases.
	repeated Alias aliases = 1;

	// ID is the unique identifier of the entity which always be a UUID. This
	// should never be allowed to be updated.
	string id = 2;

	// Name is a unique identifier of the entity which is intended to be
	// human-friendly. The default name might not be human friendly since it
	// gets suffixed by a UUID, but it can optionally be updated, unlike the ID
	// field.
	string name = 3;

	// Metadata represents the explicit metadata which is set by the
	// clients.  This is useful to tie any information pertaining to the
	// aliases. This is a non-unique field of entity, meaning multiple
	// entities can have the same metadata set. Entities will be indexed based
	// on this explicit metadata. This enables virtual groupings of entities
	// based on its metadata.
	map<string, string> metadata = 4;

	// CreationTime is the time at which this entity is first created.
	google.protobuf.Timestamp creation_time = 5;

	// LastUpdateTime is the most recent time at which the properties of this
	// entity got modified. This is helpful in filtering out entities based on
	// its age and to take action on them, if desired.
	google.protobuf.Timestamp last_update_time= 6;

	// MergedEntityIDs are the entities which got merged to this one. Entities
	// will be indexed based on all the entities that got merged into it. This
	// helps to apply the actions on this entity on the tokens that are merged
	// to the merged entities. Merged entities will be deleted entirely and
	// this is the only trackable trail of its earlier presence.
	repeated string merged_entity_ids = 7;

	// Policies the entity is entitled to
	repeated string policies = 8;

	// BucketKeyHash is the MD5 hash of the storage bucket key into which this
	// entity is stored in the underlying storage. This is useful to find all
	// the entities belonging to a particular bucket during invalidation of the
	// storage key.
	string bucket_key_hash = 9;

	// **Enterprise only**
	// MFASecrets holds the MFA secrets indexed by the identifier of the MFA
	// method configuration.
	//map<string, mfa.Secret> mfa_secrets = 10;
}

// Alias represents the alias that gets stored inside of the
// entity object in storage and also represents in an in-memory index of an
// alias object.
message Alias {
	// ID is the unique identifier that represents this alias
	string id = 1;

	// EntityID is the entity identifier to which this alias belongs to
	string entity_id = 2;

	// MountType is the backend mount's type to which this alias belongs to.
	// This enables categorically querying aliases of specific backend types.
	string mount_type = 3;

	// MountAccessor is the backend mount's accessor to which this alias 
	// belongs to.
	string mount_accessor = 4;

	// MountPath is the backend mount's path to which the Maccessor belongs to. This
	// field is not used for any operational purposes. This is only returned when
	// alias is read, only as a nicety.
	string mount_path = 5;

	// Metadata is the explicit metadata that clients set against an entity
	// which enables virtual grouping of aliases. Aliases will be indexed
	// against their metadata.
	map<string, string> metadata = 6;

	// Name is the identifier of this alias in its authentication source.
	// This does not uniquely identify a alias in Vault. This in conjunction
	// with MountAccessor form to be the factors that represent a alias in a
	// unique way. Aliases will be indexed based on this combined uniqueness
	// factor.
	string name = 7;

	// CreationTime is the time at which this alias was first created
	google.protobuf.Timestamp creation_time = 8;

	// LastUpdateTime is the most recent time at which the properties of this
	// alias got modified. This is helpful in filtering out aliases based
	// on its age and to take action on them, if desired.
	google.protobuf.Timestamp last_update_time = 9;

	// MergedFromEntityIDs is the FIFO history of merging activity by entity IDs from
	// which this alias is transfered over to the entity to which it
	// currently belongs to.
	repeated string merged_from_entity_ids = 10;
}