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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage
* (C) 2017 Minio, Inc.
*
* 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 credentials
import "os"
// A EnvAWS retrieves credentials from the environment variables of the
// running process. EnvAWSironment credentials never expire.
//
// EnvAWSironment variables used:
//
// * Access Key ID: AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY.
// * Secret Access Key: AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY.
// * Secret Token: AWS_SESSION_TOKEN.
type EnvAWS struct {
retrieved bool
}
// NewEnvAWS returns a pointer to a new Credentials object
// wrapping the environment variable provider.
func NewEnvAWS() *Credentials {
return New(&EnvAWS{})
}
// Retrieve retrieves the keys from the environment.
func (e *EnvAWS) Retrieve() (Value, error) {
e.retrieved = false
id := os.Getenv("AWS_ACCESS_KEY_ID")
if id == "" {
id = os.Getenv("AWS_ACCESS_KEY")
}
secret := os.Getenv("AWS_SECRET_ACCESS_KEY")
if secret == "" {
secret = os.Getenv("AWS_SECRET_KEY")
}
signerType := SignatureV4
if id == "" || secret == "" {
signerType = SignatureAnonymous
}
e.retrieved = true
return Value{
AccessKeyID: id,
SecretAccessKey: secret,
SessionToken: os.Getenv("AWS_SESSION_TOKEN"),
SignerType: signerType,
}, nil
}
// IsExpired returns if the credentials have been retrieved.
func (e *EnvAWS) IsExpired() bool {
return !e.retrieved
}
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