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Copy pathassume-role.go
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145 lines (124 loc) · 3.98 KB
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//go:build ignore
// +build ignore
// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"context"
"flag"
"fmt"
"io"
"log"
"net/url"
"os"
"time"
"github.com/minio/minio-go/v7"
cr "github.com/minio/minio-go/v7/pkg/credentials"
)
var (
// Minio endpoint (for STS API)
stsEndpoint string
// User account credentials
minioUsername string
minioPassword string
// Display credentials flag
displayCreds bool
// Credential expiry duration
expiryDuration time.Duration
// Bucket to list
bucketToList string
// Session policy file (FIXME: add support in minio-go)
sessionPolicyFile string
)
func init() {
flag.StringVar(&stsEndpoint, "sts-ep", "http://localhost:9000", "STS endpoint")
flag.StringVar(&minioUsername, "u", "", "MinIO Username")
flag.StringVar(&minioPassword, "p", "", "MinIO Password")
flag.BoolVar(&displayCreds, "d", false, "Only show generated credentials")
flag.DurationVar(&expiryDuration, "e", 0, "Request a duration of validity for the generated credential")
flag.StringVar(&bucketToList, "b", "", "Bucket to list (defaults to username)")
flag.StringVar(&sessionPolicyFile, "s", "", "File containing session policy to apply to the STS request")
}
func main() {
flag.Parse()
if minioUsername == "" || minioPassword == "" {
flag.PrintDefaults()
return
}
// The credentials package in minio-go provides an interface to call the
// STS API.
// Initialize credential options
var stsOpts cr.STSAssumeRoleOptions
stsOpts.AccessKey = minioUsername
stsOpts.SecretKey = minioPassword
if sessionPolicyFile != "" {
var policy string
if f, err := os.Open(sessionPolicyFile); err != nil {
log.Fatalf("Unable to open session policy file: %v", err)
} else {
bs, err := io.ReadAll(f)
if err != nil {
log.Fatalf("Error reading session policy file: %v", err)
}
policy = string(bs)
}
stsOpts.Policy = policy
}
if expiryDuration != 0 {
stsOpts.DurationSeconds = int(expiryDuration.Seconds())
}
li, err := cr.NewSTSAssumeRole(stsEndpoint, stsOpts)
if err != nil {
log.Fatalf("Error initializing STS Identity: %v", err)
}
stsEndpointURL, err := url.Parse(stsEndpoint)
if err != nil {
log.Fatalf("Error parsing sts endpoint: %v", err)
}
opts := &minio.Options{
Creds: li,
Secure: stsEndpointURL.Scheme == "https",
}
v, err := li.Get()
if err != nil {
log.Fatalf("Error retrieving STS credentials: %v", err)
}
if displayCreds {
fmt.Println("Only displaying credentials:")
fmt.Println("AccessKeyID:", v.AccessKeyID)
fmt.Println("SecretAccessKey:", v.SecretAccessKey)
fmt.Println("SessionToken:", v.SessionToken)
return
}
// Use generated credentials to authenticate with MinIO server
minioClient, err := minio.New(stsEndpointURL.Host, opts)
if err != nil {
log.Fatalf("Error initializing client: %v", err)
}
// Use minIO Client object normally like the regular client.
if bucketToList == "" {
bucketToList = minioUsername
}
fmt.Printf("Calling list objects on bucket named `%s` with temp creds:\n===\n", bucketToList)
objCh := minioClient.ListObjects(context.Background(), bucketToList, minio.ListObjectsOptions{})
for obj := range objCh {
if obj.Err != nil {
log.Fatalf("Listing error: %v", obj.Err)
}
fmt.Printf("Key: %s\nSize: %d\nLast Modified: %s\n===\n", obj.Key, obj.Size, obj.LastModified)
}
}