Skype user data file
application/octet-stream
Magic Bytes
Offset: 4
6D 6F 6F 76
The Skype user data file is a proprietary data format developed by Skype Technologies to store local configuration and profile information on a user's machine. It serves as a repository for caching contact lists and historical usage statistics within legacy versions of the communication software. Because modern iterations of Skype utilize cloud-based synchronization, this format is now considered obsolete and presents minimal security risks when encountered on older computer systems.
Validation Code
How to validate .dbb files in Python
Python
def is_dbb(file_path: str) -> bool:
"""
Check if file is a valid DBB by magic bytes.
Signature offset: 4 bytes
"""
signature = bytes([0x6D, 0x6F, 0x6F, 0x76])
with open(file_path, "rb") as f:
f.seek(4)
return f.read(4) == signatureHow to validate .dbb files in Node.js
Node.js
function isDBB(buffer: Buffer): boolean {
// Signature offset: 4 bytes
const signature = Buffer.from([0x6D, 0x6F, 0x6F, 0x76]);
if (buffer.length < 8) return false;
return buffer.subarray(4, 8).equals(signature);
}
Go
func IsDBB(data []byte) bool {
// Signature offset: 4 bytes
signature := []byte{0x6D, 0x6F, 0x6F, 0x76}
if len(data) < 8 {
return false
}
return bytes.Equal(data[4:8], signature)
}API Endpoint
GET
/api/v1/dbb
curl https://filesignature.org/api/v1/dbb