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ec2.go
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ec2.go
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package ec2
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"github.com/AndrewCopeland/conjur-authn-iam-client/pkg/utils/aws"
)
type EC2 struct {
GetIamRoleUrl string
GetIamCredentialUrl string
}
func (r EC2) getIamRoleName() (string, error) {
resp, err := http.Get(r.GetIamRoleUrl)
if err != nil {
return "", fmt.Errorf("Failed to retrieve IAM role name. %s", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", fmt.Errorf("Failed to read IAM role name. %s", err)
}
return string(body), nil
}
func (r EC2) getIamCredential(iamRoleName string) (aws.Credential, error) {
resp, err := http.Get(fmt.Sprintf(r.GetIamCredentialUrl, iamRoleName))
if err != nil {
return aws.Credential{}, fmt.Errorf("Failed to retrieve AM credential for role '%s'. %s", iamRoleName, err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return aws.Credential{}, fmt.Errorf("Failed to read IAM credential for role '%s'. %s", iamRoleName, err)
}
var cred aws.Credential
err = json.Unmarshal(body, &cred)
if err != nil {
return aws.Credential{}, fmt.Errorf("Failed to unmarshal IAM credential for role '%s', %s", iamRoleName, err)
}
return cred, nil
}
// Name name of the resource type
func (r EC2) Name() string {
return "ec2"
}
// GetCredential will retrieve an IAM credential
func (r EC2) GetCredential() (aws.Credential, error) {
iamRoleName, err := r.getIamRoleName()
if err != nil {
return aws.Credential{}, err
}
return r.getIamCredential(iamRoleName)
}
// New will create a new EC2 AWS Resource
func New() EC2 {
return EC2{
GetIamRoleUrl: "http://169.254.169.254/latest/meta-data/iam/security-credentials/",
GetIamCredentialUrl: "http://169.254.169.254/latest/meta-data/iam/security-credentials/%s",
}
}