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ad0f7a5305
Upgrade to Go 1.20.5, Hydra v2 SDK, rules-go v0.44.2 (with proper resolves), protobuf v25.3 and mass upgrade of Go dependencies.
71 lines
2.3 KiB
Go
71 lines
2.3 KiB
Go
/*
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*
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Package tokenmanager provides tokens for authenticating to S2A.
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package tokenmanager
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import (
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"fmt"
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"os"
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commonpb "github.com/google/s2a-go/internal/proto/common_go_proto"
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)
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const (
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s2aAccessTokenEnvironmentVariable = "S2A_ACCESS_TOKEN"
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)
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// AccessTokenManager manages tokens for authenticating to S2A.
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type AccessTokenManager interface {
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// DefaultToken returns a token that an application with no specified local
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// identity must use to authenticate to S2A.
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DefaultToken() (token string, err error)
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// Token returns a token that an application with local identity equal to
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// identity must use to authenticate to S2A.
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Token(identity *commonpb.Identity) (token string, err error)
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}
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type singleTokenAccessTokenManager struct {
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token string
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}
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// NewSingleTokenAccessTokenManager returns a new AccessTokenManager instance
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// that will always manage the same token.
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//
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// The token to be managed is read from the s2aAccessTokenEnvironmentVariable
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// environment variable. If this environment variable is not set, then this
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// function returns an error.
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func NewSingleTokenAccessTokenManager() (AccessTokenManager, error) {
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token, variableExists := os.LookupEnv(s2aAccessTokenEnvironmentVariable)
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if !variableExists {
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return nil, fmt.Errorf("%s environment variable is not set", s2aAccessTokenEnvironmentVariable)
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}
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return &singleTokenAccessTokenManager{token: token}, nil
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}
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// DefaultToken always returns the token managed by the
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// singleTokenAccessTokenManager.
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func (m *singleTokenAccessTokenManager) DefaultToken() (string, error) {
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return m.token, nil
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}
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// Token always returns the token managed by the singleTokenAccessTokenManager.
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func (m *singleTokenAccessTokenManager) Token(*commonpb.Identity) (string, error) {
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return m.token, nil
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}
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