github.com/oam-dev/kubevela@v1.9.11/pkg/utils/jwt.go (about)

     1  /*
     2  Copyright 2022 The KubeVela Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package utils
    18  
    19  import (
    20  	"crypto/x509"
    21  	"crypto/x509/pkix"
    22  	"encoding/pem"
    23  
    24  	"github.com/form3tech-oss/jwt-go"
    25  )
    26  
    27  // GetTokenSubject extract the subject field from the jwt token
    28  func GetTokenSubject(token string) (string, error) {
    29  	claims, sub := jwt.MapClaims{}, ""
    30  	_, err := jwt.ParseWithClaims(token, claims, nil)
    31  	if len(claims) > 0 {
    32  		sub, _ = claims["sub"].(string)
    33  	}
    34  	return sub, err
    35  }
    36  
    37  // GetCertificateSubject extract Subject from Certificate
    38  func GetCertificateSubject(certificate []byte) (*pkix.Name, error) {
    39  	if len(certificate) == 0 {
    40  		return nil, nil
    41  	}
    42  	blk, _ := pem.Decode(certificate)
    43  	if blk == nil {
    44  		return nil, nil
    45  	}
    46  	cert, err := x509.ParseCertificate(blk.Bytes)
    47  	if err != nil {
    48  		return nil, err
    49  	}
    50  	return &cert.Subject, nil
    51  }