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mukul975
c47eed6a64
- Fix 25 shell=True subprocess calls with list-based commands - Fix 49 verify=False in defensive skills (env-var override) - Add timeout to 231 HTTP/subprocess/socket calls - Fix 6 SQL injection patterns with whitelist validation - Replace 8 __import__() with standard imports - Remove 701 unused imports across 442 files - Add authorized-testing disclaimers to all offensive skills - Complete 11 incomplete skill directories - Expand 10 stub SKILL.md files with full content - Fix 2 YAML parse errors in frontmatter - Fix 5 pre-existing syntax errors - Convert 22 hardcoded paths/ports to environment variables - Back up 21 redundant skill pairs to .bak - Fix 2 global declaration errors - 724/724 skills with full folder anatomy (SKILL.md + agent.py + api-reference.md + LICENSE) - 0 compile errors across all 724 agent.py files
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1.6 KiB
name, description, domain, subdomain, tags, version, author, license
| name | description | domain | subdomain | tags | version | author | license | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| implementing-log-integrity-with-blockchain | Build an append-only log integrity chain using SHA-256 hash chaining for tamper detection. Each log entry is hashed with the previous entry's hash to create a blockchain-like structure where modifying any entry invalidates all subsequent hashes. Implements log ingestion, chain verification, tamper detection with pinpoint identification, and periodic checkpoint anchoring to external timestamping services. | cybersecurity | security-operations |
|
1.0 | mahipal | Apache-2.0 |
Implementing Log Integrity with Blockchain
Instructions
- Install dependencies:
pip install requests - Ingest log entries from syslog, JSON, or plain text files.
- For each entry, compute SHA-256 hash of: previous_hash + timestamp + log_content.
- Store the chain as a JSON ledger with entry index, timestamp, content hash, previous hash, and chain hash.
- Verify chain integrity by recomputing all hashes and detecting breaks.
- Optionally anchor checkpoint hashes to an external timestamping service.
python scripts/agent.py --log-file /var/log/syslog --chain-file log_chain.json --verify --output integrity_report.json
Examples
Chain Entry Structure
{"index": 42, "timestamp": "2024-01-15T10:30:00Z", "content_hash": "a1b2c3...",
"prev_hash": "d4e5f6...", "chain_hash": "SHA256(prev_hash + timestamp + content_hash)"}
Tamper Detection
If entry 42 is modified, chain_hash[42] will not match SHA256(chain_hash[41] + ...), and all entries from 42 onward will be flagged as invalid.