79 lines
2.8 KiB
Go
79 lines
2.8 KiB
Go
/*
|
|
*
|
|
* Copyright 2021 Google LLC
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* https://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*/
|
|
|
|
package s2a
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
|
|
commonpb "github.com/google/s2a-go/internal/proto/common_go_proto"
|
|
"google.golang.org/grpc/credentials"
|
|
"google.golang.org/grpc/peer"
|
|
)
|
|
|
|
// AuthInfo exposes security information from the S2A to the application.
|
|
type AuthInfo interface {
|
|
// AuthType returns the authentication type.
|
|
AuthType() string
|
|
// ApplicationProtocol returns the application protocol, e.g. "grpc".
|
|
ApplicationProtocol() string
|
|
// TLSVersion returns the TLS version negotiated during the handshake.
|
|
TLSVersion() commonpb.TLSVersion
|
|
// Ciphersuite returns the ciphersuite negotiated during the handshake.
|
|
Ciphersuite() commonpb.Ciphersuite
|
|
// PeerIdentity returns the authenticated identity of the peer.
|
|
PeerIdentity() *commonpb.Identity
|
|
// LocalIdentity returns the local identity of the application used during
|
|
// session setup.
|
|
LocalIdentity() *commonpb.Identity
|
|
// PeerCertFingerprint returns the SHA256 hash of the peer certificate used in
|
|
// the S2A handshake.
|
|
PeerCertFingerprint() []byte
|
|
// LocalCertFingerprint returns the SHA256 hash of the local certificate used
|
|
// in the S2A handshake.
|
|
LocalCertFingerprint() []byte
|
|
// IsHandshakeResumed returns true if a cached session was used to resume
|
|
// the handshake.
|
|
IsHandshakeResumed() bool
|
|
// SecurityLevel returns the security level of the connection.
|
|
SecurityLevel() credentials.SecurityLevel
|
|
}
|
|
|
|
// AuthInfoFromPeer extracts the authinfo.S2AAuthInfo object from the given
|
|
// peer, if it exists. This API should be used by gRPC clients after
|
|
// obtaining a peer object using the grpc.Peer() CallOption.
|
|
func AuthInfoFromPeer(p *peer.Peer) (AuthInfo, error) {
|
|
s2aAuthInfo, ok := p.AuthInfo.(AuthInfo)
|
|
if !ok {
|
|
return nil, errors.New("no S2AAuthInfo found in Peer")
|
|
}
|
|
return s2aAuthInfo, nil
|
|
}
|
|
|
|
// AuthInfoFromContext extracts the authinfo.S2AAuthInfo object from the given
|
|
// context, if it exists. This API should be used by gRPC server RPC handlers
|
|
// to get information about the peer. On the client-side, use the grpc.Peer()
|
|
// CallOption and the AuthInfoFromPeer function.
|
|
func AuthInfoFromContext(ctx context.Context) (AuthInfo, error) {
|
|
p, ok := peer.FromContext(ctx)
|
|
if !ok {
|
|
return nil, errors.New("no Peer found in Context")
|
|
}
|
|
return AuthInfoFromPeer(p)
|
|
}
|