Assume Role API support

[prakashsvmx]

Assume Role API support

Fixes #841
Fixes #928
Fixes #818

Start the server

Create user (assign no policy) - Test Error scenarios
Assign policies to test the other scenarios.

Tested with

• MinIO Server
• S3

Test Script

const Arp =  require('../../dist/main/AssumeRoleProvider')
var Minio = require("../../dist/main/minio")
const _ = require('lodash')
const AssumeRoleProvider = Arp.AssumeRoleProvider


// Instantiate the minio client with the endpoint
// and access keys as shown below.
//Play instance
var minioClient = new Minio.Client({
  endPoint: 'play.min.io',
  port: 9000,
  useSSL: true,
  accessKey: 'Q3AM3UQ867SPQQA43P2F',
  secretKey: 'zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG'
})

//Local testing
minioClient = new Minio.Client({
  endPoint: 'localhost',
  port: 9000,
  useSSL: false,
  accessKey: 'minio',
  secretKey: 'minio123'
})

const file = '/home/prakash/Downloads/Temp/MinIOJSTestObjects/cardinal-points.png'
const bucketName = "sph-my-bucket"
const objectName="cardinal-points.png"
const prefix="test"
const objectNameWithPrefix = `${prefix}/${objectName}`


const getAssumeRoleCredentialsWithSet  =  async () => {
    //minioClient.traceOn()
    const withoutRole = await minioClient.statObject(bucketName,"PDT.png")
    console.log("Without role:", withoutRole)

    let ap = new AssumeRoleProvider({
        stsEndpoint:"http://127.0.0.1:9000",
        //"https://play.min.io:9000"
        accessKey: 'miniojs',
        secretKey: 'miniojs123'
    })
    await minioClient.setCredentialsProvider(ap)// `await` this is important.

    const withRole = await minioClient.statObject(bucketName,"PDT.png")
    console.log("With Role details:", withRole)

}


const getAssumeRoleInitialize  =  async () => {
  //minioClient.traceOn()
  let asRoleProvider = new AssumeRoleProvider({
    stsEndpoint:"http://127.0.0.1:9000",
    accessKey: 'miniojs',
    secretKey: 'miniojs123'

  })
    const asRoleClient= new Minio.Client({
        endPoint: 'localhost',
        port: 9000,
        useSSL: false,
        accessKey: 'miniojs',
        secretKey: 'miniojs123',
        credentialsProvider:asRoleProvider
    })

    const withRole = await asRoleClient.statObject(bucketName,"PDT.png")
    console.log("Got 1st details at::", new Date())


    setTimeout(async ()=>{
        console.log("Try Refresh Expiry...")
        const beforeExpiry = await asRoleClient.statObject(bucketName,"PDT.png")
        console.log("Got 2nd details at::", new Date(),beforeExpiry)

    }, (1*60*1000))

}

[dvaldivia]

PTAL @kannappanr @kanagarajkm