if testCase.result != result {
			t.Errorf("Test %d: Expected signV4TrimAll result to be \"%s\", but found it to be \"%s\" instead", i+1, testCase.result, result)
		}
	}
}

// Test getContentSha256Cksum
func TestGetContentSha256Cksum(t *testing.T) {
	testCases := []struct {
		h        string // header SHA256
		q        string // query SHA256
		expected string // expected SHA256
	}{

		// such broken clients and content-length > 0.
		return r.ContentLength > 0 && !globalServerCtxt.StrictS3Compat
	}
	return false
}

// Returns SHA256 for calculating canonical-request.
func getContentSha256Cksum(r *http.Request, stype serviceType) string {
	if stype == serviceSTS {
		payload, err := io.ReadAll(io.LimitReader(r.Body, stsRequestBodyLimit))
		if err != nil {
			logger.CriticalIf(GlobalContext, err)
		}

		return doesSignV2Match(r)
	}
	return doesPresignV2SignatureMatch(r)
}

func reqSignatureV4Verify(r *http.Request, region string, stype serviceType) (s3Error APIErrorCode) {
	sha256sum := getContentSha256Cksum(r, stype)
	switch {
	case isRequestSignatureV4(r):
		return doesSignatureMatch(sha256sum, r, region, stype)
	case isRequestPresignedSignatureV4(r):
		return doesPresignedSignatureMatch(sha256sum, r, region, stype)

			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
			return
		}

		if !skipContentSha256Cksum(r) {
			sha256hex = getContentSha256Cksum(r, serviceS3)
		}
	}

	if err := enforceBucketQuotaHard(ctx, bucket, size); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	actualSize := size

			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Err), r.URL)
			return
		}
		if !skipContentSha256Cksum(r) {
			sha256hex = getContentSha256Cksum(r, serviceS3)
		}
	}

	if _, ok := r.Header[xhttp.MinIOSourceReplicationCheck]; ok {
		// requests to just validate replication settings and permissions are not allowed to write data