istio.io/istio@v0.0.0-20240520182934-d79c90f27776/security/pkg/credentialfetcher/fetcher.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 credentialfetcher fetches workload credentials through platform plugins.
    16  package credentialfetcher
    17  
    18  import (
    19  	"fmt"
    20  
    21  	"istio.io/istio/pkg/security"
    22  	"istio.io/istio/security/pkg/credentialfetcher/plugin"
    23  )
    24  
    25  func NewCredFetcher(credtype, trustdomain, jwtPath, identityProvider string) (security.CredFetcher, error) {
    26  	switch credtype {
    27  	case security.GCE:
    28  		return plugin.CreateGCEPlugin(trustdomain, jwtPath, identityProvider), nil
    29  	case security.JWT, "":
    30  		// If unset, also default to JWT for backwards compatibility
    31  		if jwtPath == "" {
    32  			return nil, nil // no cred fetcher - using certificates only
    33  		}
    34  		return plugin.CreateTokenPlugin(jwtPath), nil
    35  	case security.Mock: // for test only
    36  		return plugin.CreateMockPlugin("test_token"), nil
    37  	default:
    38  		return nil, fmt.Errorf("invalid credential fetcher type %s", credtype)
    39  	}
    40  }