proxy_checker: simplify CRC32 calc

server/proxy_checker/proxy_checker.go

@@ -6,7 +6,6 @@ package proxy_checker
 
 import (
 	"context"
-	"encoding/hex"
 	"fmt"
 	"hash/crc32"
 	"io"
@@ -102,20 +101,14 @@ func testProxy(ctx context.Context, auditor *audit.Auditor, proxyBaseURL string)
 		return false, resp
 	}
 
-	// Copy response body and compare CRC32 checksum with expected value
+	// Calculate CRC32 checksum of response body
 	hash := crc32.NewIEEE()
 	if _, err := io.Copy(hash, resp.Body); err != nil {
 		auditor.SugaredLogger.Errorf("Error reading response body from image proxy %s: %v", proxyBaseURL, err)
 		return false, resp
 	}
 
-	checksum := hash.Sum32()
-	checksumHex := hex.EncodeToString([]byte{
-		byte(checksum >> 24),
-		byte(checksum >> 16),
-		byte(checksum >> 8),
-		byte(checksum),
-	})
+	checksumHex := fmt.Sprintf("%08x", hash.Sum32())
 
 	if checksumHex != testImageCRC32 {
 		auditor.SugaredLogger.Warnf("CRC32 mismatch for image proxy %s. Expected: %s, Got: %s", proxyBaseURL, testImageCRC32, checksumHex)