mirror of
https://github.com/restic/restic.git
synced 2024-08-19 19:03:22 +02:00
174 lines
5.8 KiB
Go
174 lines
5.8 KiB
Go
/*
|
|
* Minio Go Library for Amazon S3 Compatible Cloud Storage
|
|
* Copyright 2019 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 (
|
|
"encoding/xml"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"time"
|
|
)
|
|
|
|
// AssumedRoleUser - The identifiers for the temporary security credentials that
|
|
// the operation returns. Please also see https://docs.aws.amazon.com/goto/WebAPI/sts-2011-06-15/AssumedRoleUser
|
|
type AssumedRoleUser struct {
|
|
Arn string
|
|
AssumedRoleID string `xml:"AssumeRoleId"`
|
|
}
|
|
|
|
// AssumeRoleWithClientGrantsResponse contains the result of successful AssumeRoleWithClientGrants request.
|
|
type AssumeRoleWithClientGrantsResponse struct {
|
|
XMLName xml.Name `xml:"https://sts.amazonaws.com/doc/2011-06-15/ AssumeRoleWithClientGrantsResponse" json:"-"`
|
|
Result ClientGrantsResult `xml:"AssumeRoleWithClientGrantsResult"`
|
|
ResponseMetadata struct {
|
|
RequestID string `xml:"RequestId,omitempty"`
|
|
} `xml:"ResponseMetadata,omitempty"`
|
|
}
|
|
|
|
// ClientGrantsResult - Contains the response to a successful AssumeRoleWithClientGrants
|
|
// request, including temporary credentials that can be used to make Minio API requests.
|
|
type ClientGrantsResult struct {
|
|
AssumedRoleUser AssumedRoleUser `xml:",omitempty"`
|
|
Audience string `xml:",omitempty"`
|
|
Credentials struct {
|
|
AccessKey string `xml:"AccessKeyId" json:"accessKey,omitempty"`
|
|
SecretKey string `xml:"SecretAccessKey" json:"secretKey,omitempty"`
|
|
Expiration time.Time `xml:"Expiration" json:"expiration,omitempty"`
|
|
SessionToken string `xml:"SessionToken" json:"sessionToken,omitempty"`
|
|
} `xml:",omitempty"`
|
|
PackedPolicySize int `xml:",omitempty"`
|
|
Provider string `xml:",omitempty"`
|
|
SubjectFromClientGrantsToken string `xml:",omitempty"`
|
|
}
|
|
|
|
// ClientGrantsToken - client grants token with expiry.
|
|
type ClientGrantsToken struct {
|
|
token string
|
|
expiry int
|
|
}
|
|
|
|
// Token - access token returned after authenticating client grants.
|
|
func (c *ClientGrantsToken) Token() string {
|
|
return c.token
|
|
}
|
|
|
|
// Expiry - expiry for the access token returned after authenticating
|
|
// client grants.
|
|
func (c *ClientGrantsToken) Expiry() string {
|
|
return fmt.Sprintf("%d", c.expiry)
|
|
}
|
|
|
|
// A STSClientGrants retrieves credentials from Minio service, and keeps track if
|
|
// those credentials are expired.
|
|
type STSClientGrants struct {
|
|
Expiry
|
|
|
|
// Required http Client to use when connecting to Minio STS service.
|
|
Client *http.Client
|
|
|
|
// Minio endpoint to fetch STS credentials.
|
|
stsEndpoint string
|
|
|
|
// getClientGrantsTokenExpiry function to retrieve tokens
|
|
// from IDP This function should return two values one is
|
|
// accessToken which is a self contained access token (JWT)
|
|
// and second return value is the expiry associated with
|
|
// this token. This is a customer provided function and
|
|
// is mandatory.
|
|
getClientGrantsTokenExpiry func() (*ClientGrantsToken, error)
|
|
}
|
|
|
|
// NewSTSClientGrants returns a pointer to a new
|
|
// Credentials object wrapping the STSClientGrants.
|
|
func NewSTSClientGrants(stsEndpoint string, getClientGrantsTokenExpiry func() (*ClientGrantsToken, error)) (*Credentials, error) {
|
|
if stsEndpoint == "" {
|
|
return nil, errors.New("STS endpoint cannot be empty")
|
|
}
|
|
if getClientGrantsTokenExpiry == nil {
|
|
return nil, errors.New("Client grants access token and expiry retrieval function should be defined")
|
|
}
|
|
return New(&STSClientGrants{
|
|
Client: &http.Client{
|
|
Transport: http.DefaultTransport,
|
|
},
|
|
stsEndpoint: stsEndpoint,
|
|
getClientGrantsTokenExpiry: getClientGrantsTokenExpiry,
|
|
}), nil
|
|
}
|
|
|
|
func getClientGrantsCredentials(clnt *http.Client, endpoint string,
|
|
getClientGrantsTokenExpiry func() (*ClientGrantsToken, error)) (AssumeRoleWithClientGrantsResponse, error) {
|
|
|
|
accessToken, err := getClientGrantsTokenExpiry()
|
|
if err != nil {
|
|
return AssumeRoleWithClientGrantsResponse{}, err
|
|
}
|
|
|
|
v := url.Values{}
|
|
v.Set("Action", "AssumeRoleWithClientGrants")
|
|
v.Set("Token", accessToken.Token())
|
|
v.Set("DurationSeconds", accessToken.Expiry())
|
|
v.Set("Version", "2011-06-15")
|
|
|
|
u, err := url.Parse(endpoint)
|
|
if err != nil {
|
|
return AssumeRoleWithClientGrantsResponse{}, err
|
|
}
|
|
u.RawQuery = v.Encode()
|
|
|
|
req, err := http.NewRequest("POST", u.String(), nil)
|
|
if err != nil {
|
|
return AssumeRoleWithClientGrantsResponse{}, err
|
|
}
|
|
resp, err := clnt.Do(req)
|
|
if err != nil {
|
|
return AssumeRoleWithClientGrantsResponse{}, err
|
|
}
|
|
defer resp.Body.Close()
|
|
if resp.StatusCode != http.StatusOK {
|
|
return AssumeRoleWithClientGrantsResponse{}, errors.New(resp.Status)
|
|
}
|
|
|
|
a := AssumeRoleWithClientGrantsResponse{}
|
|
if err = xml.NewDecoder(resp.Body).Decode(&a); err != nil {
|
|
return AssumeRoleWithClientGrantsResponse{}, err
|
|
}
|
|
return a, nil
|
|
}
|
|
|
|
// Retrieve retrieves credentials from the Minio service.
|
|
// Error will be returned if the request fails.
|
|
func (m *STSClientGrants) Retrieve() (Value, error) {
|
|
a, err := getClientGrantsCredentials(m.Client, m.stsEndpoint, m.getClientGrantsTokenExpiry)
|
|
if err != nil {
|
|
return Value{}, err
|
|
}
|
|
|
|
// Expiry window is set to 10secs.
|
|
m.SetExpiration(a.Result.Credentials.Expiration, DefaultExpiryWindow)
|
|
|
|
return Value{
|
|
AccessKeyID: a.Result.Credentials.AccessKey,
|
|
SecretAccessKey: a.Result.Credentials.SecretKey,
|
|
SessionToken: a.Result.Credentials.SessionToken,
|
|
SignerType: SignatureV4,
|
|
}, nil
|
|
}
|