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Incorporated Script Code-Signing

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This commit is contained in:
Nicole Rappe
2025-10-19 19:55:19 -06:00
parent 7700865bf7
commit 03bb19ef05
6 changed files with 313 additions and 54 deletions
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50
Data/Agent/Roles/role_ScriptExec_SYSTEM.py
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@@ -8,6 +8,8 @@ import subprocess
import base64
from typing import Dict, List, Optional
from signature_utils import decode_script_bytes, verify_and_store_script_signature
ROLE_NAME = 'script_exec_system'
ROLE_CONTEXTS = ['system']
@@ -293,7 +295,53 @@ class Role:
return
job_id = payload.get('job_id')
script_type = (payload.get('script_type') or '').lower()
content = _decode_script_content(payload.get('script_content'), payload.get('script_encoding'))
script_bytes = decode_script_bytes(payload.get('script_content'), payload.get('script_encoding'))
if script_bytes is None:
await sio.emit('quick_job_result', {
'job_id': job_id,
'status': 'Failed',
'stdout': '',
'stderr': 'Invalid script payload (unable to decode)',
})
return
signature_b64 = payload.get('signature')
sig_alg = (payload.get('sig_alg') or 'ed25519').lower()
signing_key = payload.get('signing_key')
if sig_alg and sig_alg not in ('ed25519', 'eddsa'):
await sio.emit('quick_job_result', {
'job_id': job_id,
'status': 'Failed',
'stdout': '',
'stderr': f'Unsupported script signature algorithm: {sig_alg}',
})
return
if not isinstance(signature_b64, str) or not signature_b64.strip():
await sio.emit('quick_job_result', {
'job_id': job_id,
'status': 'Failed',
'stdout': '',
'stderr': 'Missing script signature; rejecting payload',
})
return
http_client_fn = getattr(self.ctx, 'hooks', {}).get('http_client') if hasattr(self.ctx, 'hooks') else None
client = http_client_fn() if callable(http_client_fn) else None
if client is None:
await sio.emit('quick_job_result', {
'job_id': job_id,
'status': 'Failed',
'stdout': '',
'stderr': 'Signature verification unavailable (client missing)',
})
return
if not verify_and_store_script_signature(client, script_bytes, signature_b64, signing_key):
await sio.emit('quick_job_result', {
'job_id': job_id,
'status': 'Failed',
'stdout': '',
'stderr': 'Rejected script payload due to invalid signature',
})
return
content = script_bytes.decode('utf-8', errors='replace')
raw_env = payload.get('environment')
env_map = _sanitize_env_map(raw_env)
variables = payload.get('variables') if isinstance(payload.get('variables'), list) else []