frostfs-api/proto-docs/session.md

Protocol Documentation

Table of Contents

• session/service.proto

• Services

  • SessionService

• Messages

  • CreateRequest
  • CreateRequest.Body
  • CreateResponse
  • CreateResponse.Body

• session/types.proto

  • Messages
    • ObjectSessionContext
    • RequestMetaHeader
    • RequestVerificationHeader
    • ResponseMetaHeader
    • ResponseVerificationHeader
    • SessionToken
    • SessionToken.Body
    • SessionToken.Body.TokenLifetime
    • XHeader

• Scalar Value Types

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session/service.proto

Service "neo.fs.v2.session.SessionService"

Create Session record on Node side

rpc Create(CreateRequest) returns (CreateResponse);

Method Create

Create opens new session between the client and the server.

Name	Input	Output
Create	CreateRequest	CreateResponse

Message CreateRequest

CreateRequest carries an information necessary for opening a session.

Field	Type	Label	Description
body	CreateRequest.Body		Body of create session token request message.
meta_header	RequestMetaHeader		Carries request meta information. Header data is used only to regulate message transport and does not affect request execution.
verify_header	RequestVerificationHeader		Carries request verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission.

Message CreateRequest.Body

Request body

Field	Type	Label	Description
owner_id	neo.fs.v2.refs.OwnerID		Carries an identifier of a session initiator.
expiration	uint64		Expiration Epoch

Message CreateResponse

CreateResponse carries an information about the opened session.

Field	Type	Label	Description
body	CreateResponse.Body		Body of create session token response message.
meta_header	ResponseMetaHeader		Carries response meta information. Header data is used only to regulate message transport and does not affect request execution.
verify_header	ResponseVerificationHeader		Carries response verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission.

Message CreateResponse.Body

Response body

Field	Type	Label	Description
id	bytes		id carries an identifier of session token.
session_key	bytes		session_key carries a session public key.

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session/types.proto

Message ObjectSessionContext

Context information for Session Tokens related to ObjectService requests

Field	Type	Label	Description
verb	ObjectSessionContext.Verb		Verb is a type of request for which the token is issued
address	neo.fs.v2.refs.Address		Related Object address

Message RequestMetaHeader

Information about the request

Field	Type	Label	Description
version	neo.fs.v2.refs.Version		Client API version.
epoch	uint64		Client local epoch number. Set to 0 if unknown.
ttl	uint32		Maximum number of nodes in the request route.
x_headers	XHeader	repeated	Request X-Headers.
session_token	SessionToken		Token is a token of the session within which the request is sent
bearer_token	neo.fs.v2.acl.BearerToken		Bearer is a Bearer token of the request
origin	RequestMetaHeader		RequestMetaHeader of the origin request.

Message RequestVerificationHeader

Verification info for request signed by all intermediate nodes

Field	Type	Label	Description
body_signature	neo.fs.v2.refs.Signature		Request Body signature. Should be generated once by request initiator.
meta_signature	neo.fs.v2.refs.Signature		Request Meta signature is added and signed by any intermediate node
origin_signature	neo.fs.v2.refs.Signature		Sign previous hops
origin	RequestVerificationHeader		Chain of previous hops signatures

Message ResponseMetaHeader

Information about the response

Field	Type	Label	Description
version	neo.fs.v2.refs.Version		Server API version.
epoch	uint64		Server local epoch number.
ttl	uint32		Maximum number of nodes in the response route.
x_headers	XHeader	repeated	Response X-Headers.
origin	ResponseMetaHeader		Carries response meta header of the origin response.

Message ResponseVerificationHeader

Verification info for response signed by all intermediate nodes

Field	Type	Label	Description
body_signature	neo.fs.v2.refs.Signature		Response Body signature. Should be generated once by answering node.
meta_signature	neo.fs.v2.refs.Signature		Response Meta signature is added and signed by any intermediate node
origin_signature	neo.fs.v2.refs.Signature		Sign previous hops
origin	ResponseVerificationHeader		Chain of previous hops signatures

Message SessionToken

NeoFS session token.

Field	Type	Label	Description
body	SessionToken.Body		Session Token body
signature	neo.fs.v2.refs.Signature		Signature is a signature of session token information

Message SessionToken.Body

Session token body

Field	Type	Label	Description
id	bytes		ID is a token identifier. valid UUIDv4 represented in bytes
owner_id	neo.fs.v2.refs.OwnerID		OwnerID carries identifier of the session initiator.
lifetime	SessionToken.Body.TokenLifetime		Lifetime is a lifetime of the session
session_key	bytes		SessionKey is a public key of session key
object	ObjectSessionContext		ObjectService session context.

Message SessionToken.Body.TokenLifetime

Lifetime parameters of the token. Filed names taken from rfc7519.

Field	Type	Label	Description
exp	uint64		Expiration Epoch
nbf	uint64		Not valid before Epoch
iat	uint64		Issued at Epoch

Message XHeader

Extended headers for Request/Response

Field	Type	Label	Description
key	string		Key of the X-Header.
value	string		Value of the X-Header.

ObjectSessionContext.Verb

Object request verbs

Name	Number	Description
VERB_UNSPECIFIED	0	Unknown verb
PUT	1	Refers to object.Put RPC call
GET	2	Refers to object.Get RPC call
HEAD	3	Refers to object.Head RPC call
SEARCH	4	Refers to object.Search RPC call
DELETE	5	Refers to object.Delete RPC call
RANGE	6	Refers to object.GetRange RPC call
RANGEHASH	7	Refers to object.GetRangeHash RPC call

Scalar Value Types

.proto Type	Notes	C++ Type	Java Type	Python Type
double		double	double	float
float		float	float	float
int32	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead.	int32	int	int
int64	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead.	int64	long	int/long
uint32	Uses variable-length encoding.	uint32	int	int/long
uint64	Uses variable-length encoding.	uint64	long	int/long
sint32	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.	int32	int	int
sint64	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.	int64	long	int/long
fixed32	Always four bytes. More efficient than uint32 if values are often greater than 2^28.	uint32	int	int
fixed64	Always eight bytes. More efficient than uint64 if values are often greater than 2^56.	uint64	long	int/long
sfixed32	Always four bytes.	int32	int	int
sfixed64	Always eight bytes.	int64	long	int/long
bool		bool	boolean	boolean
string	A string must always contain UTF-8 encoded or 7-bit ASCII text.	string	String	str/unicode
bytes	May contain any arbitrary sequence of bytes.	string	ByteString	str