88 lines
2.4 KiB
Go
88 lines
2.4 KiB
Go
// Copyright 2023 Woodpecker Authors
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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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// http://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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package grpc
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import (
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"errors"
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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// JWTManager is a JSON web token manager.
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type JWTManager struct {
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secretKey string
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tokenDuration time.Duration
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}
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// UserClaims is a custom JWT claims that contains some user's information.
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type AgentTokenClaims struct {
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jwt.RegisteredClaims
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AgentID int64 `json:"agent_id"`
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}
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const jwtTokenDuration = 1 * time.Hour
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// NewJWTManager returns a new JWT manager.
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func NewJWTManager(secretKey string) *JWTManager {
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return &JWTManager{secretKey, jwtTokenDuration}
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}
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// Generate generates and signs a new token for a user.
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func (manager *JWTManager) Generate(agentID int64) (string, error) {
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claims := AgentTokenClaims{
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RegisteredClaims: jwt.RegisteredClaims{
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Issuer: "woodpecker",
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Subject: fmt.Sprintf("%d", agentID),
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Audience: jwt.ClaimStrings{},
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NotBefore: jwt.NewNumericDate(time.Now()),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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ID: fmt.Sprintf("%d", agentID),
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(manager.tokenDuration)),
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},
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AgentID: agentID,
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString([]byte(manager.secretKey))
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}
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// Verify verifies the access token string and return a user claim if the token is valid.
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func (manager *JWTManager) Verify(accessToken string) (*AgentTokenClaims, error) {
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token, err := jwt.ParseWithClaims(
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accessToken,
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&AgentTokenClaims{},
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func(token *jwt.Token) (any, error) {
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_, ok := token.Method.(*jwt.SigningMethodHMAC)
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if !ok {
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return nil, errors.New("unexpected token signing method")
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}
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return []byte(manager.secretKey), nil
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},
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)
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if err != nil {
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return nil, fmt.Errorf("invalid token: %w", err)
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}
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claims, ok := token.Claims.(*AgentTokenClaims)
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if !ok {
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return nil, errors.New("invalid token claims")
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}
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return claims, nil
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}
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