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mukul975
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Complete skill folder anatomy across all cybersecurity skills: - scripts/agent.py: 80-150 line Python agents using real libraries (impacket, boto3, azure-mgmt-*, kubernetes, pefile, yara, scapy, shodan, stix2, etc.) - references/api-reference.md: real API documentation with method signatures - LICENSE: MIT license for all skill folders
57 lines
2.1 KiB
Markdown
57 lines
2.1 KiB
Markdown
# API Reference: Securing Serverless Functions
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## boto3 Lambda Client
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### Installation
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```bash
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pip install boto3
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```
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### Key Methods
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| Method | Description |
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|--------|-------------|
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| `list_functions()` | List all functions with configuration details |
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| `get_function_configuration()` | Get function config (role, env vars, KMS) |
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| `get_function_url_config()` | Get function URL and auth type |
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| `get_function_concurrency()` | Get reserved concurrency settings |
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| `update_function_configuration()` | Update KMS key, logging, VPC config |
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| `create_function_url_config()` | Create function URL with auth type |
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### Function Configuration Fields
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| Field | Security Relevance |
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|-------|-------------------|
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| `Role` | Execution role ARN (check for least privilege) |
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| `Environment.Variables` | May contain hardcoded secrets |
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| `KMSKeyArn` | Customer-managed KMS key for env encryption |
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| `VpcConfig` | VPC subnet and security group configuration |
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| `Timeout` | Max execution time (1-900 seconds) |
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| `Runtime` | Language runtime (check for EOL versions) |
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| `Layers` | Shared code layers (scan independently) |
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### Function URL Auth Types
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| Value | Description |
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|-------|-------------|
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| `AWS_IAM` | Requires IAM authentication (secure) |
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| `NONE` | No authentication required (insecure for sensitive functions) |
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## boto3 IAM Client (Role Checks)
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| Method | Description |
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|--------|-------------|
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| `list_attached_role_policies()` | Check for overly broad managed policies |
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| `get_role_policy()` | Inspect inline policy for wildcards |
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| `get_role()` | Check trust policy and permission boundary |
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## GuardDuty Lambda Protection
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```python
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gd = boto3.client("guardduty")
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gd.update_detector(
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DetectorId="<id>",
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Features=[{"Name": "LAMBDA_NETWORK_ACTIVITY_LOGS", "Status": "ENABLED"}]
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)
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```
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## References
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- Lambda security best practices: https://docs.aws.amazon.com/lambda/latest/dg/lambda-security.html
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- Lambda function URLs: https://docs.aws.amazon.com/lambda/latest/dg/lambda-urls.html
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- GuardDuty Lambda protection: https://docs.aws.amazon.com/guardduty/latest/ug/lambda-protection.html
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