}

// Verify if request has AWS PreSign Version '4'.
func isRequestPresignedSignatureV4(r *http.Request) bool {
	_, ok := r.Form[xhttp.AmzCredential]
	return ok
}

// Verify request has AWS PreSign Version '2'.
func isRequestPresignedSignatureV2(r *http.Request) bool {
	_, ok := r.Form[xhttp.AmzAccessKeyID]
	return ok
}

// Verify if request has AWS Post policy Signature Version '4'.

#   statements:
#     - resources:
#         - 'arn:aws:s3:::example*/*'
#       actions:
#         - "s3:GetObject"
#     - resources:
#         - 'arn:aws:s3:::example*'
#       actions:
#         - "s3:GetBucketLocation"
#         - "s3:ListBucket"
#         - "s3:ListBucketMultipartUploads"

		// Built-in user should be imported without errors even if LDAP is
		// enabled.
		allUsersFile: `{
  "foo": {
    "secretKey": "foobar123",
    "status": "enabled"

package replication

import (
	"encoding/xml"
	"fmt"
	"strings"

	"github.com/minio/pkg/v2/wildcard"
)

// DestinationARNPrefix - destination ARN prefix as per AWS S3 specification.
const DestinationARNPrefix = "arn:aws:s3:::"

// DestinationARNMinIOPrefix - destination ARN prefix for MinIO.
const DestinationARNMinIOPrefix = "arn:minio:replication:"

// Destination - destination in ReplicationConfiguration.

| [Hashicorp Vault](https://github.com/minio/kes/wiki/Hashicorp-Vault-Keystore)                | Local KMS. MinIO and KMS on-prem (**Recommended**)                |
| [AWS-KMS + SecretsManager](https://github.com/minio/kes/wiki/AWS-SecretsManager)             | Cloud KMS. MinIO in combination with a managed KMS installation   |

### Response Elements

XML response for this API is similar to [AWS STS AssumeRoleWithWebIdentity](https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRoleWithWebIdentity.html#API_AssumeRoleWithWebIdentity_ResponseElements)

### Errors

	"github.com/minio/pkg/v2/policy"
)

const (
	// As per AWS S3 specification, 20KiB policy JSON data is allowed.
	maxBucketPolicySize = 20 * humanize.KiByte

	// Policy configuration file.
	bucketPolicyConfig = "policy.json"
)

// PutBucketPolicyHandler - This HTTP handler stores given bucket policy configuration as per
// https://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html

## Pre-pre requisite

- A working knowledge of MinIO codebase and its various components.
- A working knowledge of AWS S3 API behaviors and corner cases.

## Pre-requisite for backporting any fixes

Fixes that are allowed a backport must satisfy any of the following criteria's:

- A fix must not be a feature, for example.

```

	globalMinioDefaultRegion = ""
	// This is a sha256 output of ``arn:aws:iam::minio:user/admin``,
	// this is kept in present form to be compatible with S3 owner ID
	// requirements -
	//
	// ```
	//    The canonical user ID is the Amazon S3–only concept.
	//    It is 64-character obfuscated version of the account ID.
	// ```
	// http://docs.aws.amazon.com/AmazonS3/latest/dev/example-walkthroughs-managing-access-example4.html

		switch header {
		case "expect":
			// Golang http server strips off 'Expect' header, if the
			// client sent this as part of signed headers we need to
			// handle otherwise we would see a signature mismatch.
			// `aws-cli` sets this as part of signed headers.
			//
			// According to
			// http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.20
			// Expect header is always of form:
			//