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package credentials
import (
"os"
"github.com/aws/aws-sdk-go/aws/awserr"
)
// EnvProviderName provides a name of Env provider
const EnvProviderName = "EnvProvider"
var (
// ErrAccessKeyIDNotFound is returned when the AWS Access Key ID can't be
// found in the process's environment.
ErrAccessKeyIDNotFound = awserr.New("EnvAccessKeyNotFound", "AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY not found in environment", nil)
// ErrSecretAccessKeyNotFound is returned when the AWS Secret Access Key
// can't be found in the process's environment.
ErrSecretAccessKeyNotFound = awserr.New("EnvSecretNotFound", "AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY not found in environment", nil)
)
// A EnvProvider retrieves credentials from the environment variables of the
// running process. Environment credentials never expire.
//
// Environment variables used:
//
// * Access Key ID: AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY
//
// * Secret Access Key: AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY
type EnvProvider struct {
retrieved bool
}
// NewEnvCredentials returns a pointer to a new Credentials object
// wrapping the environment variable provider.
func NewEnvCredentials() *Credentials {
return NewCredentials(&EnvProvider{})
}
// Retrieve retrieves the keys from the environment.
func (e *EnvProvider) 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")
}
if id == "" {
return Value{ProviderName: EnvProviderName}, ErrAccessKeyIDNotFound
}
if secret == "" {
return Value{ProviderName: EnvProviderName}, ErrSecretAccessKeyNotFound
}
e.retrieved = true
return Value{
AccessKeyID: id,
SecretAccessKey: secret,
SessionToken: os.Getenv("AWS_SESSION_TOKEN"),
ProviderName: EnvProviderName,
}, nil
}
// IsExpired returns if the credentials have been retrieved.
func (e *EnvProvider) IsExpired() bool {
return !e.retrieved
}