istio.io/istio@v0.0.0-20240520182934-d79c90f27776/security/pkg/credentialfetcher/plugin/token.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package plugin
    16  
    17  import (
    18  	"os"
    19  	"strings"
    20  
    21  	"istio.io/istio/pkg/log"
    22  	"istio.io/istio/pkg/security"
    23  )
    24  
    25  type KubernetesTokenPlugin struct {
    26  	path string
    27  }
    28  
    29  var _ security.CredFetcher = &KubernetesTokenPlugin{}
    30  
    31  func CreateTokenPlugin(path string) *KubernetesTokenPlugin {
    32  	return &KubernetesTokenPlugin{
    33  		path: path,
    34  	}
    35  }
    36  
    37  func (t KubernetesTokenPlugin) GetPlatformCredential() (string, error) {
    38  	if t.path == "" {
    39  		return "", nil
    40  	}
    41  	tok, err := os.ReadFile(t.path)
    42  	if err != nil {
    43  		log.Warnf("failed to fetch token from file: %v", err)
    44  		return "", nil
    45  	}
    46  	return strings.TrimSpace(string(tok)), nil
    47  }
    48  
    49  func (t KubernetesTokenPlugin) GetIdentityProvider() string {
    50  	return ""
    51  }
    52  
    53  func (t KubernetesTokenPlugin) Stop() {
    54  }