imessage-exporter is a tool designed to decode iMessage data stored in a unique format resembling objects. Initially, the process was rudimentary but with Apple’s new iMessage updates, critical information became only accessible within this obscure blob. Reverse engineering the binary serialization protocol behind typedstream, a format exclusive to Apple’s Foundation framework, is explored in this post. The analysis uncovers patterns suggesting how data is structured within the blob format. Clues hidden in byte sequences reveal a complex process behind encoding and decoding messages in iMessage, shedding light on Apple’s proprietary system not officially documented.
https://chrissardegna.com/blog/reverse-engineering-apples-typedstream-format/