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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
91 lines
2.3 KiB
Markdown
91 lines
2.3 KiB
Markdown
# API Reference: Auditing AWS S3 Bucket Permissions
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## boto3 S3 Client
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### List Buckets
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```python
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import boto3
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s3 = boto3.client("s3")
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response = s3.list_buckets()
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for bucket in response["Buckets"]:
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print(bucket["Name"], bucket["CreationDate"])
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```
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### Get Bucket ACL
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```python
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acl = s3.get_bucket_acl(Bucket="my-bucket")
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for grant in acl["Grants"]:
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print(grant["Grantee"], grant["Permission"])
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```
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### Get/Put Public Access Block
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```python
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# Check settings
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resp = s3.get_public_access_block(Bucket="my-bucket")
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config = resp["PublicAccessBlockConfiguration"]
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# Enable all blocks
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s3.put_public_access_block(
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Bucket="my-bucket",
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PublicAccessBlockConfiguration={
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"BlockPublicAcls": True,
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"IgnorePublicAcls": True,
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"BlockPublicPolicy": True,
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"RestrictPublicBuckets": True,
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},
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)
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```
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### Get Bucket Policy
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```python
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import json
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policy_str = s3.get_bucket_policy(Bucket="my-bucket")["Policy"]
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policy = json.loads(policy_str)
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for stmt in policy["Statement"]:
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print(stmt["Effect"], stmt["Principal"], stmt["Action"])
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```
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### Check Encryption
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```python
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enc = s3.get_bucket_encryption(Bucket="my-bucket")
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rules = enc["ServerSideEncryptionConfiguration"]["Rules"]
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print(rules[0]["ApplyServerSideEncryptionByDefault"]["SSEAlgorithm"])
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```
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### Check Versioning
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```python
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resp = s3.get_bucket_versioning(Bucket="my-bucket")
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print(resp.get("Status", "Disabled"))
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```
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## Key S3 API Methods for Security Auditing
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| Method | Returns |
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|--------|---------|
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| `list_buckets()` | All buckets in account |
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| `get_bucket_acl()` | ACL grants (AllUsers, AuthenticatedUsers) |
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| `get_public_access_block()` | Block public access configuration |
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| `get_bucket_policy()` | Bucket policy JSON (wildcard principals) |
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| `get_bucket_encryption()` | Default encryption algorithm |
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| `get_bucket_versioning()` | Versioning status |
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| `get_bucket_logging()` | Access logging configuration |
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| `get_bucket_location()` | Bucket region |
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## Public Grant URIs to Flag
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| URI | Risk |
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|-----|------|
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| `http://acs.amazonaws.com/groups/global/AllUsers` | Public read/write |
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| `http://acs.amazonaws.com/groups/global/AuthenticatedUsers` | Any AWS account |
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### References
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- boto3 S3 docs: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3.html
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- AWS S3 security: https://docs.aws.amazon.com/AmazonS3/latest/userguide/security.html
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