Java Cryptography Extension keystorefile
application/octet-stream
Magic Bytes
Offset: 0
CE FA ED FE
The Java Cryptography Extension KeyStore (JCEKS) is a proprietary binary container format developed by Sun Microsystems, now Oracle, for the Java platform. It was specifically designed to store symmetric secret keys, alongside private keys and digital certificates, facilitating encryption and secure authentication processes. While it originally provided stronger protection than standard JKS files, this format is now considered legacy, as newer Java versions default to the industry-standard PKCS#12 format for improved interoperability.
Validation Code
How to validate .jceks files in Python
Python
def is_jceks(file_path: str) -> bool:
"""Check if file is a valid JCEKS by magic bytes."""
signature = bytes([0xCE, 0xFA, 0xED, 0xFE])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .jceks files in Node.js
Node.js
function isJCEKS(buffer: Buffer): boolean {
const signature = Buffer.from([0xCE, 0xFA, 0xED, 0xFE]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsJCEKS(data []byte) bool {
signature := []byte{0xCE, 0xFA, 0xED, 0xFE}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/jceks
curl https://filesignature.org/api/v1/jceks