if s3Error := checkRequestAuthType(ctx, r, policy.ListBucketMultipartUploadsAction, bucket, ""); s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	prefix, keyMarker, uploadIDMarker, delimiter, maxUploads, encodingType, errCode := getBucketMultipartResources(r.Form)
	if errCode != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(errCode), r.URL)
		return
	}

	// Allow putBucketACL if policy action is set, since this is a dummy call
	// we are simply re-purposing the bucketPolicyAction.
	if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketPolicyAction, bucket, ""); s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	// Before proceeding validate if bucket exists.
	_, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{})
	if err != nil {

	}

	cred, _, apiErr := getReqAccessKeyV2(r)
	if apiErr != ErrNone {
		return cred, apiErr
	}

	return cred, ErrNone
}

func doesSignV2Match(r *http.Request) APIErrorCode {
	v2Auth := r.Header.Get(xhttp.Authorization)
	cred, apiError := validateV2AuthHeader(r)
	if apiError != ErrNone {
		return apiError
	}

	// r.RequestURI will have raw encoded URI as sent by the client.

		return
	}

	vars := mux.Vars(r)
	bucket := vars["bucket"]

	if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketPolicyAction, bucket, ""); s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	// Check if bucket exists.
	if _, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {

	{err: crypto.ErrCustomerKeyMD5Mismatch, errCode: ErrSSECustomerKeyMD5Mismatch},
	{err: errObjectTampered, errCode: ErrObjectTampered},

	{err: nil, errCode: ErrNone},
	{err: errors.New("Custom error"), errCode: ErrInternalError}, // Case where err type is unknown.
}

func TestAPIErrCode(t *testing.T) {
	ctx := t.Context()
	for i, testCase := range toAPIErrorTests {

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentMD5), r.URL)
		return
	}

	if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketLifecycleAction, bucket, ""); s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	// Check if bucket exists.
	rcfg, err := globalBucketObjectLockSys.Get(bucket)
	if err != nil {

			expectedSignStr:  "abcd",
			expectedErrCode:  ErrNone,
		},
	}
	for i, testCase := range testCases {
		actualSignStr, actualErrCode := parseSignature(testCase.inputSignElement)
		if testCase.expectedErrCode != actualErrCode {
			t.Fatalf("Test %d: Expected the APIErrCode to be %d, got %d", i+1, testCase.expectedErrCode, actualErrCode)
		}
		if actualErrCode == ErrNone {
			if testCase.expectedSignStr != actualSignStr {

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
		return
	}

	if _, _, _, s3Err := checkPutObjectLockAllowed(ctx, r, bucket, object, objectAPI.GetObjectInfo, ErrNone, ErrNone); s3Err != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Err), r.URL)
		return
	}

	completeMultiPartUpload := objectAPI.CompleteMultipartUpload

	extractedSignedHeaders, errCode := extractSignedHeaders(signV4Values.SignedHeaders, r)
	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

		if s3Error == ErrNone {
			s3Error = checkRequestAuthType(ctx, r, policy.GetObjectVersionAction, bucket, object)
		}
	} else {
		s3Error = checkRequestAuthType(ctx, r, policy.GetObjectAttributesAction, bucket, object)
		if s3Error == ErrNone {
			s3Error = checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, object)
		}
	}

	if s3Error != ErrNone {