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registration_messages.go
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/
registration_messages.go
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// Copyright (c) 2020, Cloudflare. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the names of its contributors
// may be used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package opaque
import (
"crypto"
"crypto/x509"
"github.com/tatianab/mint/syntax"
)
// RegistrationRequest is the first message sent by the client to
// register a new OPAQUE identity with that server
//
// struct {
// opaque id<0..2^16-1>;
// opaque data<1..2^16-1>;
// } RegistrationRequest;
//
// 2 2
// | userIDLen | userID | oprfDataLen | oprfData |.
type RegistrationRequest struct {
UserID []byte `tls:"head=2"`
OprfData []byte `tls:"head=2, min=1"`
}
// Marshal returns the raw form of the Registration Request.
func (rr *RegistrationRequest) Marshal() ([]byte, error) {
return syntax.Marshal(rr)
}
// Unmarshal converts the raw data of a RegistrationRequest into a struct and
// returns the number of bytes read.
func (rr *RegistrationRequest) Unmarshal(data []byte) (int, error) {
return syntax.Unmarshal(data, rr)
}
// Type returns the type of this struct: RegistrationRequest.
func (*RegistrationRequest) Type() ProtocolMessageType {
return ProtocolMessageTypeRegistrationRequest
}
// RegistrationResponse is the first message sent by the Server in response
// to the client's registration request.
//
// struct {
// opaque data<0..2^16-1>;
// opaque pkS<0..2^16-1>;
// CredentialType secret_types<1..254>;
// CredentialType cleartext_types<0..254>;
// } RegistrationResponse;
//
// 2 2 1 1
// | oprfDataLen | oprfData | pkSLen | pkS | secretTypesLen | secretTypes | cleartextTypesLen | cleartextTypes |.
type RegistrationResponse struct {
OprfData []byte
ServerPublicKey crypto.PublicKey
CredentialEncodingPolicy *CredentialEncodingPolicy
}
type registrationResponseInner struct {
OprfData []byte `tls:"head=2"`
ServerPublicKey []byte `tls:"head=2"`
SecretTypes []CredentialType `tls:"head=1, min=1"`
CleartextTypes []CredentialType `tls:"head=1"`
}
// Marshal returns the raw form of a RegistrationResponse.
func (rr *RegistrationResponse) Marshal() ([]byte, error) {
rawServerPublicKey, err := x509.MarshalPKIXPublicKey(rr.ServerPublicKey)
if err != nil {
return nil, err
}
inner := ®istrationResponseInner{
OprfData: rr.OprfData,
ServerPublicKey: rawServerPublicKey,
SecretTypes: rr.CredentialEncodingPolicy.SecretTypes,
CleartextTypes: rr.CredentialEncodingPolicy.CleartextTypes,
}
return syntax.Marshal(inner)
}
// Unmarshal converts the raw data into a RegistrationResponse and returns the
// number of bytes read.
func (rr *RegistrationResponse) Unmarshal(data []byte) (int, error) {
inner := ®istrationResponseInner{}
bytesRead, err := syntax.Unmarshal(data, inner)
if err != nil {
return 0, err
}
serverPublicKey, err := x509.ParsePKIXPublicKey(inner.ServerPublicKey)
if err != nil {
return 0, err
}
*rr = RegistrationResponse{
OprfData: inner.OprfData,
ServerPublicKey: serverPublicKey,
CredentialEncodingPolicy: &CredentialEncodingPolicy{
SecretTypes: inner.SecretTypes,
CleartextTypes: inner.CleartextTypes,
},
}
return bytesRead, nil
}
// Type returns the type of this struct: RegistrationResponse.
func (*RegistrationResponse) Type() ProtocolMessageType {
return ProtocolMessageTypeRegistrationResponse
}
// RegistrationUpload is the second and final message sent by the
// client to register a new identity with a server.
//
// struct {
// Envelope envelope;
// opaque pkU<0..2^16-1>;
// } RegistrationUpload;
//
// 2
// | envelope | pubKeyLen | pubKey.
type RegistrationUpload struct {
Envelope *Envelope
ClientPublicKey crypto.PublicKey
}
type registrationUploadInner struct {
Envelope *Envelope
UserPublicKey []byte `tls:"head=2"`
}
// Marshal returns the raw form of a RegistrationUpload.
func (ru *RegistrationUpload) Marshal() ([]byte, error) {
rawPublicKey, err := x509.MarshalPKIXPublicKey(ru.ClientPublicKey)
if err != nil {
return nil, err
}
inner := ®istrationUploadInner{
Envelope: ru.Envelope,
UserPublicKey: rawPublicKey,
}
return syntax.Marshal(inner)
}
// Unmarshal converts the raw data into a RegistrationUpload and returns the number of
// bytes read.
func (ru *RegistrationUpload) Unmarshal(data []byte) (int, error) {
inner := ®istrationUploadInner{}
bytesRead, err := syntax.Unmarshal(data, inner)
if err != nil {
return 0, err
}
userPublicKey, err := x509.ParsePKIXPublicKey(inner.UserPublicKey)
if err != nil {
return 0, err
}
*ru = RegistrationUpload{
Envelope: inner.Envelope,
ClientPublicKey: userPublicKey,
}
return bytesRead, nil
}
// Type returns the type of this struct: RegistrationUpload.
func (*RegistrationUpload) Type() ProtocolMessageType {
return ProtocolMessageTypeRegistrationUpload
}