Clawsend
LeoYeAI/openclaw-master-skills
Agent-to-agent messaging with cryptographic signing and encryption.
Agent skill
Configuring Certificate Authority With Openssl
Build a two-tier PKI Certificate Authority hierarchy (offline Root CA plus issuing Intermediate CA) using OpenSSL and the Python cryptography library, covering certificate extensions, CRL…
Install Configuring Certificate Authority With Openssl
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills configuring-certificate-authority-with-openssl --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/configuring-certificate-authority-with-openssl .claude/skills/configuring-certificate-authority-with-openssl && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "configuring-certificate-authority-with-openssl" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/configuring-certificate-authority-with-openssl into .claude/skills/configuring-certificate-authority-with-openssl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "configuring-certificate-authority-with-openssl", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/configuring-certificate-authority-with-opensslType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills configuring-certificate-authority-with-openssl --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/configuring-certificate-authority-with-openssl .agents/skills/configuring-certificate-authority-with-openssl && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "configuring-certificate-authority-with-openssl" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/configuring-certificate-authority-with-openssl into .agents/skills/configuring-certificate-authority-with-openssl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "configuring-certificate-authority-with-openssl", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills configuring-certificate-authority-with-openssl --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/configuring-certificate-authority-with-openssl .cursor/skills/configuring-certificate-authority-with-openssl && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "configuring-certificate-authority-with-openssl" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/configuring-certificate-authority-with-openssl into .cursor/skills/configuring-certificate-authority-with-openssl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "configuring-certificate-authority-with-openssl", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/configuring-certificate-authority-with-openssl--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills configuring-certificate-authority-with-openssl --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/configuring-certificate-authority-with-openssl .gemini/skills/configuring-certificate-authority-with-openssl && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "configuring-certificate-authority-with-openssl" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/configuring-certificate-authority-with-openssl into .gemini/skills/configuring-certificate-authority-with-openssl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "configuring-certificate-authority-with-openssl", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills configuring-certificate-authority-with-opensslInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/configuring-certificate-authority-with-openssl .github/skills/configuring-certificate-authority-with-openssl && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "configuring-certificate-authority-with-openssl" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/configuring-certificate-authority-with-openssl into .github/skills/configuring-certificate-authority-with-openssl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "configuring-certificate-authority-with-openssl", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills configuring-certificate-authority-with-openssl --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/configuring-certificate-authority-with-openssl .opencode/skills/configuring-certificate-authority-with-openssl && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "configuring-certificate-authority-with-openssl" agent skill from https://github.com/mukul975/Anthropic-Cybersecurity-Skills/tree/main/skills/configuring-certificate-authority-with-openssl into .opencode/skills/configuring-certificate-authority-with-openssl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "configuring-certificate-authority-with-openssl", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
configuring-certificate-authority-with-openssl- GitHub stars
- 34k
- Token cost
- ~879 tokens
- SKILL.md length
- 297 words
- Files
- 8 (incl. scripts, references, assets)
- Skills in repo
- 644
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Build a two-tier PKI Certificate Authority hierarchy (offline Root CA plus issuing Intermediate CA) using OpenSSL and the Python cryptography library, covering certificate extensions, CRL…
- Standing up an internal CA
- SKILL.md covers Overview, When to Use, Prerequisites and Objectives, plus 3 more sections
- Runs Python scripts from its folder
- Revoking X.509 certificates
What it does
Configuring Certificate Authority With Openssl is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Build a two-tier PKI Certificate Authority hierarchy (offline Root CA plus issuing Intermediate CA) using OpenSSL and the Python cryptography library, covering certificate extensions, CRL distribution points, OCSP responder configuration, and certificate policy management. Use when standing up an internal CA, issuing or revoking X.509 certificates, or designing PKI trust hierarchies for TLS, code-signing, or client-authentication use cases.
Its SKILL.md is about 880 tokens, which your agent loads only when the skill is triggered. The skill folder holds 10 other files, including scripts, reference files and assets (for example `assets/template.md`, `references/api-reference.md` and `references/standards.md`).
It sits in Security, covering Cryptography. It works with Python. The repository describes itself as: 817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io…. The licence is Apache-2.0.
When your agent uses it
- Standing up an internal CA
- Revoking X.509 certificates
- Designing PKI trust hierarchies for TLS
- Client-authentication use cases
Example prompts
- “/configuring-certificate-authority-with-openssl”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit 54a7988. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 2 files in scripts/ (Python), which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Configuring Certificate Authority With Openssl loads about 879 tokens when it runs, and up to ~2.2k if it reads all its reference files. Until then it costs about 123 tokens; SKILL.md has 297 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from mukul975/Anthropic-Cybersecurity-Skills at commit 54a7988, republished under its Apache-2.0 licence (© mukul975). 297 words, ~879 tokens.
Download SKILL.mdSave it as
.claude/skills/configuring-certificate-authority-with-openssl/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.- name
- configuring-certificate-authority-with-openssl
- description
- Build a two-tier PKI Certificate Authority hierarchy (offline Root CA plus issuing Intermediate CA) using OpenSSL and the Python cryptography library, covering certificate extensions, CRL distribution points, OCSP responder configuration, and certificate policy management. Use when standing up an internal CA, issuing or revoking X.509 certificates, or designing PKI trust hierarchies for TLS, code-signing, or client-authentication use cases.
- domain
- cybersecurity
- subdomain
- cryptography
- tags
- cryptography, pki, certificate-authority, openssl, x509
- version
- 1.0
- author
- mahipal
- license
- Apache-2.0
- nist_csf
- PR.DS-01, PR.DS-02, PR.DS-10
- mitre_attack
- T1649, T1553.004, T1557, T1587.003
Configuring Certificate Authority with OpenSSL
Overview
A Certificate Authority (CA) is the trust anchor in a PKI hierarchy, responsible for issuing, signing, and revoking digital certificates. This skill covers building a two-tier CA hierarchy (Root CA + Intermediate CA) using OpenSSL and the Python cryptography library, including CRL distribution, OCSP responder configuration, and certificate policy management.
When to Use
- When deploying or configuring configuring certificate authority with openssl capabilities in your environment
- When establishing security controls aligned to compliance requirements
- When building or improving security architecture for this domain
- When conducting security assessments that require this implementation
Prerequisites
- Familiarity with cryptography concepts and tools
- Access to a test or lab environment for safe execution
- Python 3.8+ with required dependencies installed
- Appropriate authorization for any testing activities
Objectives
- Create a Root CA with self-signed certificate
- Create an Intermediate CA signed by the Root CA
- Issue server and client certificates from the Intermediate CA
- Configure Certificate Revocation Lists (CRLs)
- Implement certificate policies and constraints
- Build a complete PKI hierarchy programmatically
Key Concepts
CA Hierarchy
Root CA (offline, air-gapped)
|
+-- Intermediate CA (online, operational)
|
+-- Server Certificates
+-- Client Certificates
+-- Code Signing CertificatesCertificate Extensions
| Extension | Purpose | Critical |
|---|---|---|
| basicConstraints | CA:TRUE/FALSE, pathLenConstraint | Yes |
| keyUsage | keyCertSign, cRLSign, digitalSignature | Yes |
| extendedKeyUsage | serverAuth, clientAuth, codeSigning | No |
| subjectKeyIdentifier | Hash of public key | No |
| authorityKeyIdentifier | Issuer's key identifier | No |
| crlDistributionPoints | URL to CRL | No |
| authorityInfoAccess | OCSP responder URL | No |
Security Considerations
- Root CA private key must be stored offline (air-gapped HSM)
- Use minimum 4096-bit RSA or P-384 ECDSA for CA keys
- Set path length constraints on intermediate CAs
- Implement certificate policies (OIDs)
- Enable CRL and OCSP for revocation checking
- Audit all certificate issuance operations
Validation Criteria
- Root CA self-signed certificate is valid
- Intermediate CA certificate chains to Root CA
- Issued certificates chain to Intermediate -> Root
- Path length constraints are enforced
- CRL is generated and accessible
- Revoked certificates appear in CRL
- Certificate policies are correctly embedded
© mukul975, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 7 other files (scripts, references, assets) in skills/configuring-certificate-authority-with-openssl of mukul975/Anthropic-Cybersecurity-Skills.
- SKILL.md
- LICENSE
- assets/template.md
- references/api-reference.md
- references/standards.md
- references/workflows.md
- scripts/agent.py
- scripts/process.py
Open the folder on GitHubat commit 54a7988
Compare with similar skills
Configuring Certificate Authority With Openssl next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Configuring Certificate Authority With Openssl this skillmukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~879 | Automated safety check: Pass | Apache-2.0 | |
| ClawsendLeoYeAI/openclaw-master-skills | 2.2k | — | ~4.3k | Automated safety check: Pass | MIT | |
| Constant-Time Analysistrailofbits/skills | 7.5k | — | ~3.3k | Automated safety check: Notes | CC-BY-SA-4.0 | |
| Security Reviewgithub/awesome-copilot | 40k | 1 repos | ~2.3k | Automated safety check: Notes | MIT | |
| Azure Keyvault Pymicrosoft/skills | 3.1k | — | ~2.4k | Automated safety check: Pass | MIT | |
| Stellar DevVelaPayments/vela-payments | 131 | — | ~1.8k | Automated safety check: Pass | MIT |
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Works with
Categories
Questions about Configuring Certificate Authority With Openssl
What does Configuring Certificate Authority With Openssl do?
Build a two-tier PKI Certificate Authority hierarchy (offline Root CA plus issuing Intermediate CA) using OpenSSL and the Python cryptography library, covering certificate extensions, CRL…. Configuring Certificate Authority With Openssl is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Build a two-tier PKI Certificate Authority hierarchy (offline Root CA plus issuing Intermediate CA) using OpenSSL and the Python cryptography library, covering certificate extensions, CRL distribution points, OCSP responder configuration, and certificate policy management.
When should I use Configuring Certificate Authority With Openssl?
Configuring Certificate Authority With Openssl fits situations like: standing up an internal CA; revoking X.509 certificates; designing PKI trust hierarchies for TLS; client-authentication use cases.
How do I install Configuring Certificate Authority With Openssl in Claude Code?
Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a claude-code`. Or copy the skill folder (skills/configuring-certificate-authority-with-openssl in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/configuring-certificate-authority-with-openssl in your project. Claude Code loads it when a task matches its description.
How do I install Configuring Certificate Authority With Openssl in Codex?
Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a codex`. Or copy the skill folder (skills/configuring-certificate-authority-with-openssl in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/configuring-certificate-authority-with-openssl in your project. Codex loads it when a task matches its description.
Can I use Configuring Certificate Authority With Openssl in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-certificate-authority-with-openssl -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/configuring-certificate-authority-with-openssl, .gemini/skills/configuring-certificate-authority-with-openssl, .github/skills/configuring-certificate-authority-with-openssl and .opencode/skills/configuring-certificate-authority-with-openssl in your project.
What does Configuring Certificate Authority With Openssl need to run?
Going by SKILL.md and its folder, Configuring Certificate Authority With Openssl needs Python for the scripts in its folder. Our summary lists: Python 3.
Does Configuring Certificate Authority With Openssl access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Configuring Certificate Authority With Openssl safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Configuring Certificate Authority With Openssl use?
Configuring Certificate Authority With Openssl is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Configuring Certificate Authority With Openssl use?
About 879 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.3k tokens, read only when the agent opens those files.
What are the alternatives to Configuring Certificate Authority With Openssl?
Skills that share tags, products or a category with Configuring Certificate Authority With Openssl: Clawsend (LeoYeAI/openclaw-master-skills, 2.2k stars), Constant-Time Analysis (trailofbits/skills, 7.5k stars), Security Review (github/awesome-copilot, 40k stars) and Azure Keyvault Py (microsoft/skills, 3.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Configuring Certificate Authority With Openssl?
mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 34,116 GitHub stars. The repository holds 644 skills in this directory. The repository was last updated on August 31, 2026.
Source: mukul975/Anthropic-Cybersecurity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.