IPA
application/octet-stream
Magic Bytes
Offset: 0
50 4B 03 04 50 4B 05 06 50 4B 07 08
The iOS App Store Package (IPA) is an application archive file format developed by Apple Inc. for distributing software on iOS and iPadOS devices. These files encapsulate compressed application binaries, resources, and digital signatures necessary for deployment through the App Store or enterprise channels. Structurally identical to the ZIP standard, IPA containers can be decompressed for inspection, although executable contents are frequently encrypted with FairPlay DRM to prevent unauthorized modification.
Validation Code
How to validate .ipa files in Python
Python
def is_ipa(file_path: str) -> bool:
"""Check if file is a valid IPA by magic bytes."""
signature = bytes([0x50, 0x4B, 0x03, 0x04, 0x50, 0x4B, 0x05, 0x06, 0x50, 0x4B, 0x07, 0x08])
with open(file_path, "rb") as f:
return f.read(12) == signatureHow to validate .ipa files in Node.js
Node.js
function isIPA(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4B, 0x03, 0x04, 0x50, 0x4B, 0x05, 0x06, 0x50, 0x4B, 0x07, 0x08]);
return buffer.subarray(0, 12).equals(signature);
}
Go
func IsIPA(data []byte) bool {
signature := []byte{0x50, 0x4B, 0x03, 0x04, 0x50, 0x4B, 0x05, 0x06, 0x50, 0x4B, 0x07, 0x08}
if len(data) < 12 {
return false
}
return bytes.Equal(data[:12], signature)
}API Endpoint
GET
/api/v1/ipa
curl https://filesignature.org/api/v1/ipa