# zhlynn/zsign

Fast Cross-Platform iOS Code Signing Tool

Repository: https://github.com/zhlynn/zsign
Canonical: https://ross.abutalabs.com/products/zsign
Language: C++
License: MIT
License Family: permissive
Last push: 2026-08-21T04:54:03+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 98, longevity 100
- inputs: {"age_days": 2540, "days_push": 12, "days_rel": 12, "gap_med": 1, "n_releases_24m": 16}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1846, forks 501 (observed 2026-08-28T04:05:43.483960+00:00)

## What it is
zsign is a fast, cross-platform open-source alternative to Apple's codesign tool for re-signing iOS .ipa packages, Mach-O binaries, and .app bundles with custom certificates and provisioning profiles. It runs on macOS, Linux, Windows, Android, and FreeBSD without requiring Xcode, and supports dylib injection and bundle metadata editing.

## Use cases
- re-sign an ipa with a new certificate without a mac
- inject a dylib into an ios app
- sign ios apps in a linux ci pipeline
- change bundle id and display name of an ipa
- inspect certificates in a p12 or mobileprovision file
- ad-hoc sign an ios app for distribution
- remove app extensions from an ipa bundle

## When to choose
- you need to re-sign iOS apps on Linux or Windows servers without Xcode
- you want fast repeated signing with caching of unchanged Mach-O binaries
- you need dylib injection or bundle metadata editing alongside signing
- you are automating iOS app re-signing in CI/CD pipelines

## When to avoid
- you need full Apple codesign compatibility or notarization for App Store submission
- you only sign on macOS and are happy with Apple's official codesign tool
- you need a GUI workflow rather than a command-line tool

## Facets
- artifact type: cli-tool
- maturity: active
- function: security, cli, developer-tools, cryptography
- domain: developer-tools, mobile-development, security
- platform: windows, cross-platform, cli
- tags: ios, code-signing, ipa, mach-o, dylib-injection, provisioning-profile, ci-cd, cpp, automation, macos, linux, android

## Member repositories
- zhlynn/zsign (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:43.483960+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:17:53.947043+00:00, confidence not recorded.
  - readme: https://github.com/zhlynn/zsign (fetched 2026-08-28T04:05:43.483960+00:00, sha b086dbd372b0)
- Data as of 2026-08-30T08:39:29.467469+00:00.