Code Signing Tool

The tool signs software artifacts to prove origin and integrity, and verifies signatures to detect tampering. Conceptually, it computes a digest of the artifact, signs the digest with a private key, and wraps the result in a CMS/PKCS7 envelope or a detached signature. This enables end-user systems and automated pipelines to validate authenticity against a trusted certificate chain. Beneficiaries include developers, security engineers, and release managers who rely on reproducible, auditable builds. Unique value lies in combining flexible algorithm choices (RSA or ECDSA, SHA-256/384/512), streamlined certificate input, and optional TSA timestamping for long-term validity. Core features cover signing, verification, certificate-chain handling, and signature metadata export, with optional offline or HSM-backed signing for high-assurance environments. Typical use cases are signing installers for Windows, macOS, and Linux packages, or embedding signatures into CI/CD artifacts to satisfy enterprise security policies. The tool supports both embedded CMS envelopes and detached signatures, facilitating compatibility with various distribution channels and automated verification tools. It integrates with existing PKI setups and can enforce signing policies or revocation checks in sensitive workflows. Overall, it enables secure distribution, easier compliance audits, and stronger supply-chain resilience across development teams and product releases.