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authorizer.go
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authorizer.go
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// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//go:generate mockgen -copyright_file ../../LICENSE -package $GOPACKAGE -source $GOFILE -destination authorizer_mock.go
package authorization
import (
"context"
"fmt"
"strings"
"go.temporal.io/server/common/config"
)
const (
// DecisionDeny means auth decision is deny
DecisionDeny Decision = iota + 1
// DecisionAllow means auth decision is allow
DecisionAllow
)
// @@@SNIPSTART temporal-common-authorization-authorizer-calltarget
// CallTarget is contains information for Authorizer to make a decision.
// It can be extended to include resources like WorkflowType and TaskQueue
type CallTarget struct {
// APIName must be the full API function name.
// Example: "/temporal.api.workflowservice.v1.WorkflowService/StartWorkflowExecution".
APIName string
// If a Namespace is not being targeted this be set to an empty string.
Namespace string
// If a Namespace is not being targeted this be set to an empty string.
Request interface{}
}
// @@@SNIPEND
type (
// Result is result from authority.
Result struct {
Decision Decision
// Reason may contain a message explaining the value of the Decision field.
Reason string
}
// Decision is enum type for auth decision
Decision int
)
// @@@SNIPSTART temporal-common-authorization-authorizer-interface
// Authorizer is an interface for implementing authorization logic
type Authorizer interface {
Authorize(ctx context.Context, caller *Claims, target *CallTarget) (Result, error)
}
// @@@SNIPEND
type hasNamespace interface {
GetNamespace() string
}
func GetAuthorizerFromConfig(config *config.Authorization) (Authorizer, error) {
switch strings.ToLower(config.Authorizer) {
case "":
return NewNoopAuthorizer(), nil
case "default":
return NewDefaultAuthorizer(), nil
}
return nil, fmt.Errorf("unknown authorizer: %s", config.Authorizer)
}