testCases := []struct {
		form     http.Header
		expected APIErrorCode
	}{
		// (0) It should fail if 'X-Amz-Credential' is missing.
		{
			form:     http.Header{},
			expected: ErrCredMalformed,
		},
		// (1) It should fail if the access key is incorrect.
		{
			form: http.Header{
				"X-Amz-Credential": []string{fmt.Sprintf(credentialTemplate, "EXAMPLEINVALIDEXAMPL", now.Format(yyyymmdd), globalMinioDefaultRegion)},
			},

	}

	if conf.IsSPEnabled() {
		credential, err = newCredentialFromSP(conf)
	} else {
		credential, err = azblob.NewSharedKeyCredential(conf.AccountName, conf.AccountKey)
	}
	if err != nil {
		if _, ok := err.(base64.CorruptInputError); ok {
			return nil, errors.New("invalid Azure credentials")
		}
		return nil, err
	}
	p := azblob.NewPipeline(credential, azblob.PipelineOptions{})
	var u *url.URL

/home/user1/.minio
└─ certs
   ├─ CAs
   ├─ private.key
   └─ public.crt
```

You can provide a custom certs directory using `--certs-dir` command line option.

#### Credentials

On MinIO admin credentials or root credentials are only allowed to be changed using ENVs namely `MINIO_ROOT_USER` and `MINIO_ROOT_PASSWORD`.

```sh
export MINIO_ROOT_USER=minio
export MINIO_ROOT_PASSWORD=minio13
minio server /data
```

}

func validateAdminSignature(ctx context.Context, r *http.Request, region string) (auth.Credentials, bool, APIErrorCode) {
	var cred auth.Credentials
	var owner bool
	s3Err := ErrAccessDenied
	if _, ok := r.Header[xhttp.AmzContentSha256]; ok &&
		getRequestAuthType(r) == authTypeSigned {

		// Get credential information from the request.
		cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)

	}{
		{"shastring", "", "shastring"},
		{emptySHA256, "", emptySHA256},
		{"", "", emptySHA256},
		{"", "X-Amz-Credential=random", unsignedPayload},
		{"", "X-Amz-Credential=random&X-Amz-Content-Sha256=" + unsignedPayload, unsignedPayload},
		{"", "X-Amz-Credential=random&X-Amz-Content-Sha256=shastring", "shastring"},
	}

	for i, testCase := range testCases {

function __init__() {
	echo "Initializing environment"
	mkdir -p "$WORK_DIR"
	mkdir -p "$MINIO_CONFIG_DIR"

	## version is purposefully set to '3' for minio to migrate configuration file
	echo '{"version": "3", "credential": {"accessKey": "minio", "secretKey": "minio123"}, "region": "us-east-1"}' >"$MINIO_CONFIG_DIR/config.json"

	if [ ! -f /tmp/mc ]; then
		wget --quiet -O /tmp/mc https://dl.minio.io/client/mc/release/linux-amd64/mc &&

	testCases := []struct {
		inputQueryKey   string
		inputQueryValue string
		expectedResult  bool
	}{
		// Test case - 1.
		// Test case with query key ""X-Amz-Credential" set.
		{"", "", false},
		// Test case - 2.
		{"X-Amz-Credential", "", true},
		// Test case - 3.
		{"X-Amz-Content-Sha256", "", false},
	}

	for i, testCase := range testCases {
		// creating an input HTTP request.

	shred -n 1 -s 1M - 1>"$FILE_1_MB" 2>/dev/null
	shred -n 1 -s 65M - 1>"$FILE_65_MB" 2>/dev/null

	## version is purposefully set to '3' for minio to migrate configuration file
	echo '{"version": "3", "credential": {"accessKey": "minio", "secretKey": "minio123"}, "region": "us-east-1"}' >"$MINIO_CONFIG_DIR/config.json"

	if ! wget -q -O "$FUNCTIONAL_TESTS" https://raw.githubusercontent.com/minio/mc/master/functional-tests.sh; then

		"s3:GetObject",
		"s3:PutObject"
	  ],
	  "Effect": "Allow",
	  "Resource": ["arn:aws:s3:::mybucket/${aws:username}/*"]
	}
  ]
}
```

If the user is authenticating using an STS credential which was authorized from OpenID connect we allow all `jwt:*` variables specified in the JWT specification, custom `jwt:*` or extensions are not supported. List of policy variables for OpenID based STS.

- `jwt:sub`
- `jwt:iss`

	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	cred, _, errCode = checkKeyValid(r, signV4Values.Credential.accessKey)
	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	// Verify if region is valid.
	region = signV4Values.Credential.scope.region

	// Extract date, if not present throw error.
	var dateStr string