# Credential Scanner Quick Reference

**Module:** `api/utils/credential_scanner`
**Purpose:** Import credentials from files to database with auto-encryption

---

## Quick Start

```python
from api.database import SessionLocal
from api.utils.credential_scanner import scan_and_import_credentials

db = SessionLocal()
try:
    results = scan_and_import_credentials(
        base_path="C:/Projects/MyClient",
        db=db,
        client_id="uuid-here"  # Optional
    )
    print(f"Imported: {results['credentials_imported']}")
finally:
    db.close()
```

---

## Functions

### 1. `scan_for_credential_files(base_path)`
Find all credential files in directory tree.

**Returns:** `List[str]` - File paths

**Finds:**
- credentials.md, credentials.txt
- passwords.md, passwords.txt
- .env, .env.local, .env.production
- secrets.md, auth.md

---

### 2. `parse_credential_file(file_path)`
Parse credentials from a file.

**Returns:** `List[Dict]` - Credential dictionaries

**Example output:**
```python
[
    {
        "service_name": "Gitea Admin",
        "credential_type": "password",
        "username": "admin",
        "password": "SecurePass123!"
    },
    ...
]
```

---

### 3. `import_credentials_to_db(db, credentials, client_id=None, user_id="system_import")`
Import credentials with auto-encryption.

**Returns:** `int` - Count of imported credentials

**Features:**
- Auto-encrypts sensitive fields (AES-256-GCM)
- Creates audit log entries
- Never logs plaintext values
- Continues on errors

---

### 4. `scan_and_import_credentials(base_path, db, client_id=None, user_id="system_import")`
Complete workflow in one call.

**Returns:** `Dict[str, int]`
```python
{
    "files_found": 3,
    "credentials_parsed": 8,
    "credentials_imported": 8
}
```

---

## File Formats

### Markdown (.md)
```markdown
## Service Name
Username: admin
Password: secret123
API Key: sk-1234567890
URL: https://example.com
Notes: Additional info
```

### Environment (.env)
```bash
DATABASE_URL=mysql://user:pass@host/db
API_KEY=sk-1234567890
SECRET_TOKEN=abc123def456
```

### Text (.txt)
Same as Markdown format

---

## Credential Types Auto-Detected

| Value Pattern | Type | Field |
|--------------|------|-------|
| `sk-*` | api_key | api_key |
| `ghp_*` | api_key | api_key |
| `mysql://...` | connection_string | connection_string |
| `-----BEGIN...` | ssh_key | password |
| JWT (3 parts) | jwt | token |
| Default | password | password |

---

## Security

**Encryption:** AES-256-GCM via `credential_service`
**Audit:** Every import logged to `credential_audit_log`
**Logging:** Never logs plaintext credentials

---

## Command Line

```bash
# Preview
python example_credential_import.py /path --preview

# Import
python example_credential_import.py /path --client-id "uuid"
```

---

## Common Workflows

### Import from Client Directory
```python
db = SessionLocal()
try:
    results = scan_and_import_credentials(
        "C:/Projects/ClientA",
        db,
        client_id="client-uuid"
    )
finally:
    db.close()
```

### Preview Before Import
```python
files = scan_for_credential_files("/path")
for f in files:
    creds = parse_credential_file(f)
    print(f"{f}: {len(creds)} credentials")
```

### Import with Error Handling
```python
files = scan_for_credential_files("/path")
for file_path in files:
    try:
        creds = parse_credential_file(file_path)
        count = import_credentials_to_db(db, creds)
        print(f"✓ {count} from {file_path}")
    except Exception as e:
        print(f"✗ Failed: {e}")
```

---

## Testing

```bash
python test_credential_scanner.py
# All 5 tests should pass
```

---

## Documentation

- **Full Guide:** `CREDENTIAL_SCANNER_GUIDE.md`
- **Summary:** `CREDENTIAL_SCANNER_SUMMARY.md`
- **Examples:** `example_credential_import.py`
- **Tests:** `test_credential_scanner.py`

---

## Troubleshooting

**No files found?**
- Check base_path exists
- Verify file names match patterns
- Ensure not in excluded dirs (.git, node_modules)

**Parsing errors?**
- Verify file format (headers, key:value pairs)
- Check UTF-8 encoding
- Ensure recognized key names

**Import fails?**
- Check database connection
- Verify ENCRYPTION_KEY set
- Check client_id exists (if provided)

---

**Quick Help:** See `CREDENTIAL_SCANNER_GUIDE.md` for complete documentation
