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signer.go
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signer.go
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// Copyright 2023 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"
jwtgo "github.com/golang-jwt/jwt"
)
type Signer interface {
Sign(claims *Claims) (string, error)
}
type signer struct {
key interface{}
method jwtgo.SigningMethod
}
// NewSigner returns a new signer using SigningMethodRS256.
func NewSigner(method jwtgo.SigningMethod, keyFile string) (Signer, error) {
key, err := readKeyFile(method, keyFile, true)
if err != nil {
return nil, fmt.Errorf("unable to read key file: %v", err)
}
return &signer{
key: key,
method: method,
}, nil
}
func (s *signer) Sign(claims *Claims) (string, error) {
token := jwtgo.NewWithClaims(s.method, claims)
return token.SignedString(s.key)
}