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jwt.go
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jwt.go
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// Copyright 2020 The PipeCD Authors.
//
// 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
//
// http://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 jwt
import (
"fmt"
"os"
"time"
jwtgo "github.com/golang-jwt/jwt"
"github.com/pipe-cd/pipe/pkg/model"
)
const (
// Issuer is the name of the issuer for PipeCD token.
Issuer = "PipeCD"
// SignedTokenKey is the name of singed token key in cookie.
SignedTokenKey = "token"
)
// Claims extends the StandardClaims with the role to access PipeCD resources.
type Claims struct {
jwtgo.StandardClaims
AvatarURL string `json:"avatarUrl,omitempty"`
Role model.Role `json:"role,omitempty"`
}
// NewClaims creates a new claims for a given github user.
func NewClaims(githubUserID, avatarURL string, ttl time.Duration, role model.Role) *Claims {
now := time.Now().UTC()
return &Claims{
StandardClaims: jwtgo.StandardClaims{
Subject: githubUserID,
Issuer: Issuer,
IssuedAt: now.Unix(),
NotBefore: now.Unix(),
ExpiresAt: now.Add(ttl).Unix(),
Audience: "",
},
AvatarURL: avatarURL,
Role: role,
}
}
func readKeyFile(method jwtgo.SigningMethod, keyFile string, isSigningKey bool) (interface{}, error) {
data, err := os.ReadFile(keyFile)
if err != nil {
return nil, fmt.Errorf("unable to read key file: %v", err)
}
switch method.Alg() {
case "HS256", "HS384", "HS512":
return data, nil
case "RS256", "RS384", "RS512":
if isSigningKey {
return jwtgo.ParseRSAPrivateKeyFromPEM(data)
}
return jwtgo.ParseRSAPublicKeyFromPEM(data)
}
return nil, fmt.Errorf("unexpected signing method: %v", method.Alg())
}