Windows Authenticode Signer

DevOps & Security

windows-authenticode-signer

Windows Authenticode Signer is an Agent Skill for devops & security published in the a5c-ai/babysitter repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

Sign Windows executables with Authenticode using signtool, supporting EV and standard certificates

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QUICK START

How to use this skill

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Prompt to paste

Inspect the Agent Skill at https://github.com/a5c-ai/babysitter/blob/HEAD/library/specializations/desktop-development/skills/windows-authenticode-signer/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/windows-authenticode-signer, but wait for my approval before writing files or running scripts.

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windows-authenticode-signer

Sign Windows executables with Authenticode using signtool. This skill configures code signing for Windows applications with standard and EV certificates, timestamping, and CI/CD integration.

Capabilities

Sign executables with Authenticode
Configure EV certificate signing
Set up timestamping servers
Sign with Azure Key Vault
Configure CI/CD signing workflows
Verify existing signatures
Sign DLLs and nested binaries
Configure dual SHA1/SHA256 signing

Input Schema

{
  "type": "object",
  "properties": {
    "executablePath": { "type": "string" },
    "certificateSource": { "enum": ["file", "store", "azure-keyvault", "digicert"] },
    "timestampServer": { "type": "string" },
    "hashAlgorithm": { "enum": ["SHA256", "SHA1", "dual"] }
  },
  "required": ["executablePath"]
}

Signing Commands

# Sign with PFX file
signtool sign /f certificate.pfx /p password /fd SHA256 /tr http://timestamp.digicert.com /td SHA256 MyApp.exe

# Sign with certificate store
signtool sign /n "My Company" /fd SHA256 /tr http://timestamp.digicert.com /td SHA256 MyApp.exe

# Sign with Azure Key Vault
AzureSignTool sign -kvu https://myvault.vault.azure.net -kvi $AZURE_CLIENT_ID -kvt $AZURE_TENANT_ID -kvs $AZURE_CLIENT_SECRET -kvc MyCertificate -tr http://timestamp.digicert.com -td sha256 MyApp.exe

Verification

signtool verify /pa /v MyApp.exe

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