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v2ray-core/transport/internet/authenticator.go

109 lines
2.5 KiB

package internet
import (
"errors"
"v2ray.com/core/common"
"v2ray.com/core/common/alloc"
"v2ray.com/core/common/loader"
"github.com/golang/protobuf/proto"
"github.com/golang/protobuf/ptypes"
)
type Authenticator interface {
Seal(*alloc.Buffer)
Open(*alloc.Buffer) bool
Overhead() int
}
type AuthenticatorFactory interface {
Create(interface{}) Authenticator
}
func (this *AuthenticatorConfig) GetInternalConfig() (interface{}, error) {
return configCache.CreateConfig(this.Name)
}
func NewAuthenticatorConfig(name string, config interface{}) (*AuthenticatorConfig, error) {
pbMsg, ok := config.(proto.Message)
if !ok {
return nil, errors.New("Internet|Authenticator: Failed to convert config into proto message.")
}
anyConfig, err := ptypes.MarshalAny(pbMsg)
if err != nil {
return nil, err
}
return &AuthenticatorConfig{
Name: name,
Settings: anyConfig,
}, nil
}
func (this *AuthenticatorConfig) CreateAuthenticator() (Authenticator, error) {
config, err := this.GetInternalConfig()
if err != nil {
return nil, err
}
return CreateAuthenticator(this.Name, config)
}
var (
authenticatorCache = make(map[string]AuthenticatorFactory)
configCache = loader.ConfigCreatorCache{}
)
func RegisterAuthenticator(name string, factory AuthenticatorFactory) error {
if _, found := authenticatorCache[name]; found {
return common.ErrDuplicatedName
}
authenticatorCache[name] = factory
return nil
}
func RegisterAuthenticatorConfig(name string, configCreator loader.ConfigCreator) error {
return configCache.RegisterCreator(name, configCreator)
}
func CreateAuthenticator(name string, config interface{}) (Authenticator, error) {
factory, found := authenticatorCache[name]
if !found {
return nil, common.ErrObjectNotFound
}
return factory.Create(config), nil
}
type AuthenticatorChain struct {
authenticators []Authenticator
}
func NewAuthenticatorChain(auths ...Authenticator) Authenticator {
return &AuthenticatorChain{
authenticators: auths,
}
}
func (this *AuthenticatorChain) Overhead() int {
total := 0
for _, auth := range this.authenticators {
total += auth.Overhead()
}
return total
}
func (this *AuthenticatorChain) Open(payload *alloc.Buffer) bool {
for _, auth := range this.authenticators {
if !auth.Open(payload) {
return false
}
}
return true
}
func (this *AuthenticatorChain) Seal(payload *alloc.Buffer) {
for i := len(this.authenticators) - 1; i >= 0; i-- {
auth := this.authenticators[i]
auth.Seal(payload)
}
}