Ev Certificate Validator

DevOps & Security

ev-certificate-validator

Ev Certificate Validator 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.

Validate EV code signing certificate chain and timestamp for Windows SmartScreen

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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/ev-certificate-validator/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/ev-certificate-validator, but wait for my approval before writing files or running scripts.

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ev-certificate-validator

Validate EV (Extended Validation) code signing certificate chain and timestamp to ensure Windows SmartScreen compatibility.

Capabilities

Verify certificate chain validity
Check timestamp presence and validity
Validate EV certificate attributes
Check certificate expiration
Verify signature algorithm strength
Validate publisher information

Input Schema

{
  "type": "object",
  "properties": {
    "signedFile": { "type": "string" },
    "checkSmartScreen": { "type": "boolean", "default": true }
  },
  "required": ["signedFile"]
}

Validation Commands

# Verify signature with chain
signtool verify /pa /all /v signed.exe

# Check certificate details
certutil -dump signed.exe

# Verify timestamp
signtool verify /pa /tw signed.exe

Related Skills

windows-authenticode-signer
code-signing-setup process