smimesign ☆

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Description:
S/MIME signing utility for use with Git

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Security

Tags: git smime signing security x509 cli

Install: brew install smimesign

About:
Smimesign is a command-line utility that enables developers to perform S/MIME signing on Git commits and tags. It integrates with Git's commit signing framework to provide cryptographically verifiable commit signatures using X.509 certificates. This tool is particularly valuable for enterprise environments that require compliance with certificate-based signing policies.

Key Features:

Integrates seamlessly with Git's commit signing workflow
Supports X.509 certificates from various PKI providers
Compatible with hardware security modules (HSMs) via PKCS#11
Provides clear verification output for signed commits

Use Cases:

Complying with corporate security policies requiring S/MIME signed commits
Signing Git commits with existing enterprise certificates
Establishing trust in commit authenticity across distributed teams

Alternatives:

GPG – GPG is the Git default for commit signing, but Smimesign is designed for organizations that require S/MIME/X.509 certificates instead of PGP keys
SSH signing – SSH signing is a native Git alternative that uses SSH keys, while Smimesign specifically supports PKI infrastructure with X.509 certificates

Version History

Detected	Version	Rev	Change	Commit
Sep 15, 2025 10:47am		0	VERSION_BUMP	a189dff6
Sep 13, 2024 11:26pm		0	VERSION_BUMP	2b65ed18