libtatsu ☆

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Description:
Library handling the communication with Apple's Tatsu Signing Server (TSS)

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: library apple ios tss jailbreak firmware

Install: brew install libtatsu

About:
Libtatsu is a C library that provides a programmatic interface for interacting with Apple's Tatsu Signing Server (TSS). It handles the complex communication protocols required to request signing tickets for iOS devices, which is essential for tasks like firmware restores and SHSH blob saving. This library serves as a core dependency for various iOS jailbreaking and device management tools.

Key Features:

Implements the TSS protocol for communication with Apple's servers
Handles request construction and response parsing for signing tickets
Provides a C API for integration into other applications
Supports various device and firmware configurations

Use Cases:

Saving SHSH blobs for iOS firmware versions to enable future restores
Building custom iOS restore tools and utilities
Developing software that requires on-demand signing from Apple's TSS

Alternatives:

tsschecker – A standalone CLI tool for checking and saving blobs, whereas libtatsu is a library providing the underlying functionality.

Version History

Detected	Version	Rev	Change	Commit
Sep 16, 2025 10:27am		0	VERSION_BUMP	1dfa3bed