oprf

package
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 Go to latest Published: Jan 12, 2024 License: MIT Imports: 10 Imported by: 0

Documentation

Overview

Package oprf implements the Elliptic Curve Oblivious Pseudorandom Function (EC-OPRF) from https://tools.ietf.org/html/draft-irtf-cfrg-voprf.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Client 

type Client struct {
	Identifier
	// contains filtered or unexported fields
}

Client implements the OPRF client and holds its state.

func (*Client) Blind 

func (c *Client) Blind(input []byte, blind *group.Scalar) *group.Element

TODO: Blind存储input(password)和c.blind， 输出盲化值 Blind masks the input.

func (*Client) Finalize 

func (c *Client) Finalize(evaluation *group.Element) []byte

Finalize terminates the OPRF by unblinding the evaluation and hashing the transcript.

type Identifier 

type Identifier string

Identifier of the OPRF compatible cipher suite to be used. 

const (
	// Ristretto255Sha512 is the OPRF cipher suite of the Ristretto255 group and SHA-512.
	Ristretto255Sha512 Identifier = "ristretto255-SHA512"

	// P256Sha256 is the OPRF cipher suite of the NIST P-256 group and SHA-256.
	P256Sha256 Identifier = "P256-SHA256"

	// P384Sha384 is the OPRF cipher suite of the NIST P-384 group and SHA-384.
	P384Sha384 Identifier = "P384-SHA384"

	// P521Sha512 is the OPRF cipher suite of the NIST P-512 group and SHA-512.
	P521Sha512 Identifier = "P521-SHA512"
)

func IDFromGroup 

func IDFromGroup(g group.Group) Identifier

IDFromGroup returns the OPRF identifier corresponding to the input group.

func (Identifier) Available 

func (i Identifier) Available() bool

Available returns whether the Identifier has been registered of not.

func (Identifier) Client 

func (i Identifier) Client() *Client

TODO: oprf.Client() Client returns an OPRF client.

func (Identifier) DeriveKey 

func (i Identifier) DeriveKey(seed, info []byte) *group.Scalar

DeriveKey returns a scalar mapped from the input.

func (Identifier) Evaluate 

func (i Identifier) Evaluate(privateKey *group.Scalar, blindedElement *group.Element) *group.Element

Evaluate evaluates the blinded input with the given key.

func (Identifier) Group 

func (i Identifier) Group() group.Group

Group returns the Group identifier for the cipher suite.

func (Identifier) Server 

func (i Identifier) Server() *Server

New: add Server

type Server 

type Server struct {
	Identifier
	// contains filtered or unexported fields
}

New: add oprf Server

func (*Server) Blind 

func (s *Server) Blind(blindedElement *group.Element) *group.Element

New: add server blind func

func (*Server) ServiceLogin 

func (s *Server) ServiceLogin(a1, a2, tau1, tau2 *group.Element, client *http.Client) *group.Element

func (*Server) ServiceReg 

func (s *Server) ServiceReg(a1 *group.Element, a2 *group.Element, client *http.Client) *group.Element

func (*Server) UnBlind 

func (s *Server) UnBlind(blindedElement *group.Element) *group.Element

New: add server unblind func

Source Files

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