Crush compressed archive (.cru)
.cru file signature | application/octet-stream
Crush compressed archive
Magic Bytes
Offset 0
43 52 55 53 48 20 76
Sources: Gary Kessler
Extension
.cru
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .cru files in Python
def is_cru(file_path: str) -> bool:
"""Check if file is a valid CRU by magic bytes."""
signature = bytes([0x43, 0x52, 0x55, 0x53, 0x48, 0x20, 0x76])
with open(file_path, "rb") as f:
return f.read(7) == signatureHow to validate .cru files in Node.js
function isCRU(buffer: Buffer): boolean {
const signature = Buffer.from([0x43, 0x52, 0x55, 0x53, 0x48, 0x20, 0x76]);
return buffer.subarray(0, 7).equals(signature);
}How to validate .cru files in Go
func IsCRU(data []byte) bool {
signature := []byte{0x43, 0x52, 0x55, 0x53, 0x48, 0x20, 0x76}
if len(data) < 7 {
return false
}
return bytes.Equal(data[:7], signature)
}API Endpoint
/api/v1/cru
curl https://filesignature.org/api/v1/cru
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .cru file?
A .cru file is a Crush compressed archive file. Crush compressed archive
What are the magic bytes for .cru files?
The magic bytes for Crush compressed archive files are 43 52 55 53 48 20 76 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .cru file?
To validate a .cru file, read the first bytes of the file and compare them against the known magic bytes (43 52 55 53 48 20 76) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .cru files?
There is no officially registered MIME type for .cru files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .cru files?
Crush compressed archive (.cru) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.