geändert: README.md

geändert:       client/client.py
	gelöscht:       lib/__pycache__/crypto_utils.cpython-313.pyc
	gelöscht:       lib/__pycache__/jebp_utils.cpython-313.pyc
	gelöscht:       lib/__pycache__/terminal_table.cpython-313.pyc
	geändert:       lib/jebp_utils.py
	gelöscht:       server/clients_management/chclient.py
	gelöscht:       server/clients_management/rmclient.py
	neue Datei:     server/data/conf/client_admin_rights
	umbenannt:      server/config/clients/fingerprints -> server/data/conf/client_fingerprints
	neue Datei:     server/data/conf/topics
	geändert:       server/server.py
	neue Datei:     server/utils/clients_management/chclient.py
	neue Datei:     server/utils/clients_management/lsclients.py
	umbenannt:      server/clients_management/mkclient.py -> server/utils/clients_management/mkclient.py
	neue Datei:     server/utils/clients_management/rmclient.py
	umbenannt:      server/clients_management/lsclients.py -> server/utils/topics_management/lstopics.py

README.md

@@ -26,3 +26,142 @@ All messages begin with `0x01`, followed by the content length length. The conte
     1. Client: Client certificate
 
     The server closes the connection if the client is unauthorized.
+
+
+### Commands
+#### `0x11`: Create topic
+##### Request
+`0x11<TOPIC_NAME>`, parameters:
+- `<TOPIC_NAME>`: The name of the topic
+##### Response
+###### Status code
+- `0xa1`: Topic successfully created
+- `0xb4`: Unknown error creating the topic
+- `0xb6`: Topic exists
+- `0xb7`: No administrative rights
+###### Content
+Empty
+
+Requires administrative rights.
+
+
+#### `0x12`: Create record
+##### Request
+`0x12<TOPIC_NAME><CHECKSUM><TIMESTAMP><CONTENT>`, parameters:
+- `<TOPIC_NAME>`: The name of the topic
+- `<CHECKSUM>`: The CRC
+- `<TIMESTAMP>`: The timestamp of the record (the milliseconds since the epoch, formatted as `int64`). If it is `0`, the timestamp the record was is at will be saved.
+- `<CONTENT>`: The record content
+##### Response
+###### Status code
+- `0xa1`: Record successfully created
+- `0xb3`: Unknown error creating the record. Probably the CRC is invalid if the repetition byte is `0x31`
+###### Content
+Empty
+
+
+#### `0x21`: Subscribe
+##### Request
+`0x21<TOPICS>`, parameters:
+- `<TOPICS>`: The topics, comma-separated
+##### Response
+###### Status code
+- `0xa2`: Successfully subscribed
+- `0xb0`: Unknown error subscribing
+- `0xb1`: At least one of the topics does not exist
+###### Content
+- Status code `0xa0`: Empty
+- Status code `0xb1`: `<TOPICS>`, `<TOPICS>`: The topics that do not exist
+
+
+#### `0x22`: Fetch records
+##### Request
+`0x22<START_TYPE><START><MAX_BYTES>`
+- `<START_TYPE>`: One byte, if `0xc0`, the `<START>` is the timestamp of the first fetched event, if `0xc1` the offset.
+- `<START>`: The first event timestamp or offset
+- `<MAX_BYTES>`: Maximum bytes sent
+##### Response
+###### Status code
+- `0xa0`: Success
+- `0xb1`: The offset `<OFFSET>` does not exist
+
+#### `0x31`: Remove topic
+##### Request
+`0x31<TOPIC_NAME>`, parameters:
+- `<TOPIC_NAME>`: The name of the topic
+##### Response
+###### Status code
+- `0xa2`: Topic successfully removed
+- `0xb8`: Unknown deletion error
+- `0xb9`: Unknown deletion error. The client should attempt to perform the operation again.
+###### Content
+Empty
+
+Requires administrative rights.
+
+
+### Status codes
+The status code consists of two bytes.
+
+1\. Byte (status byte): The status
+
+2\. Byte (repetition byte): If the operation was unsuccessful, `0x31` if the client should try to perform the operation again, otherwise or if the operation was successful, `0x30`.
+
+In this documentation, the *status code* always means the status byte, unless otherwise stated.
+
+#### `0xa…`: Success
+- `0xa0`: Reading successful
+- `0xa1`: Creation successful
+- `0xa2`: Deletion successful
+#### `0xb…`: Error
+- `0xb0`: Reading error
+- `0xb1`: Reading error, object does not exist
+- `0xb2`: Reading error, no permission
+- `0xb3`: Creation error
+- `0xb4`: Creation error, object already exists
+- `0xb5`: Creation error, no permission
+- `0xb6`: Deletion error
+- `0xb7`: Deletion error, object does not exist
+- `0xb8`: Deletion error, no permission
+
+
+
+
+## Data storage
+The topics consist of partitions and every partition consists of segments. A segment consists of three files,
+- `<BASE_OFFSET>.log`
+- `<BASE_OFFSET>.index`
+- `<BASE_OFFSET>.timeindex`
+
+`<BASE_OFFSET>`: The offset of the first record in the segment
+
+In the `<BASE_OFFSET>.log` file, the records are saved.
+
+In the `<BASE_OFFSET>.index` file, the positions (bytes) of every 1024th record are saved.
+
+In the `<BASE_OFFSET>.timeindex` file, the timestampts of every 1024th record are saved.
+
+### Data format
+#### `<BASE_OFFSET>.log`
+##### Record
+| Field | Type | Length (bytes) | Description |
+| - | - | - | - |
+| **Offset** | `int64` | 8 | Offset |
+| **Record Length** | `int32` | 4 | Length |
+| **CRC** | `int32` | 4 | Checksum |
+| **Attributes** | `byte` | 1 | Flags, e. g. Compression |
+| **Timestamp** | `int64` | 8 | Milliseconds since Epoch |
+| **Key Length** | `int32` | 4 | The length of the key |
+| **Key** | `bytes` | -- | optional |
+| **Payload length** | `int32` | 4 | The length of the payload |
+| **Payload** | `bytes` | -- | Record payload |
+| **Headers Count** | `int8` | 1 | Number of header pairs |
+| **Header Key / Value** | `int32` | -- | Header pairs |
+
+##### Header pairs
+| Field | Type | Length (bytes) | Description |
+| - | - | - | - |
+| Header key length | `int8` | 4 | Length of the header name (key) |
+| Header key | `bytes` | -- | Header name (key) |
+| Header value length | `int8` | 4 | Length of the header value |
+| Header value | `bytes` | -- | Header value |

client/client.py

@@ -81,6 +81,14 @@ async def main():
             certfile.close()
         await sendmsg(base64.b64decode(cert_data.replace(b'-----BEGIN CERTIFICATE-----', b'').replace(b'-----END CERTIFICATE-----', b'').strip()), writer, aesgcm, client_nonce)
         
+        msg = await readmsg(reader, aesgcm, server_nonce)
+        if msg == b'SCD':
+            print('LOGIN SUCCEEDED')
+        elif msg == b'ERR':
+            print('LOGIN FAILED')
+
+        await sendmsg(b'\x11', writer, aesgcm, client_nonce)
+        print(await readmsg(reader, aesgcm, server_nonce))
 
     except MessageFormatError:
         print('invalid message format')

server/clients_management/chclient.py

@@ -1,19 +0,0 @@
-#!/usr/bin/env python3
-
-import dbm
-import sys
-from cryptography import x509
-from cryptography.hazmat.backends import default_backend
-from cryptography.hazmat.primitives import serialization
-import hashlib
-
-if len(sys.argv) < 2:
-    print(f'{sys.argv[0]}: missing key hash')
-    sys.exit(1)
-
-with dbm.open('server/config/clients/fingerprints', 'c') as db:
-    if bytes.fromhex(sys.argv[1]) not in db.keys():
-        print(f'{sys.argv[0]}: hash not registered')
-        sys.exit(1) 
-    db[bytes.fromhex(sys.argv[1])] = input('New common name: ')
-    db.close()

server/clients_management/rmclient.py

@@ -1,19 +0,0 @@
-#!/usr/bin/env python3
-
-import sys
-import os
-sys.path.append(os.getcwd())
-import dbm
-from lib.terminal_table import ascii_table
-
-if len(sys.argv) < 2:
-    print(f'{sys.argv[0]}: missing key hash')
-    sys.exit(1)
-
-with dbm.open('server/config/clients/fingerprints', 'c') as db:
-    try:
-        del db[bytes.fromhex(sys.argv[1])]
-    except:
-        print(f'{sys.argv[0]}: hash not registered')
-        sys.exit(1)
-    db.close()

server/data/conf/client_admin_rights

@@ -0,0 +1 @@
+947586a2a725bb7568fe221c9e8b443056df6213979a04ce2f38b82eeb2bd5a6

server/server.py

@@ -26,6 +26,34 @@ VERSION = 'jebp 1.0'
 CERT_FILE = 'server/sec/server.crt.pem'
 CLIENT_CERT_ISSUER_NAME = 'jCloudCA-Root-CA'
 
+class Client:
+    def __init__(self, fingerprint: bytes, common_name: str, admin: bool = False):
+        self.fingerprint = fingerprint
+        self.common_name = common_name
+        self.admin = admin
+
+def get_client_info(client_fingerprint: bytes):
+    with dbm.open('server/data/conf/client_fingerprints') as db:
+        if client_fingerprint not in db.keys():
+            raise KeyError('Client not registered')
+        common_name = db[client_fingerprint].decode()
+        db.close()
+    with open('server/data/conf/client_admin_rights') as carf:
+        admins = carf.read().split('\n')
+        carf.close()
+    return Client(fingerprint = client_fingerprint, common_name = common_name, admin = client_fingerprint.hex() in admins)
+
+
+def process_command(command, client: Client):
+    print(client.fingerprint, client.common_name, client.admin)
+    response = b''
+    if command[0] == 0x11:
+        if not client.admin:
+            response = b'\xb7'
+    return response
+
+
+
 async def handle_client(reader: asyncio.StreamReader, writer: asyncio.StreamWriter):
     addr = writer.get_extra_info('peername')
     print(f'Connected to {addr}')
@@ -68,16 +96,27 @@ async def handle_client(reader: asyncio.StreamReader, writer: asyncio.StreamWrit
 
     cert = x509.load_der_x509_certificate(await readmsg(reader, aesgcm, client_nonce))
     key_hash = hashlib.sha256(cert.public_key().public_bytes(encoding=serialization.Encoding.DER, format=serialization.PublicFormat.SubjectPublicKeyInfo)).digest()
-    with dbm.open('server/config/clients/fingerprints', 'c') as db:
+    with dbm.open('server/data/conf/client_fingerprints', 'c') as db:
         if key_hash not in db.keys():
+            await sendmsg('ERR', writer, aesgcm, server_nonce)
             raise InvalidCertificateError('client not known')
         if not validate_cert(cert, db[key_hash].decode(), CLIENT_CERT_ISSUER_NAME):
+            await sendmsg('ERR', writer, aesgcm, server_nonce)
             raise InvalidCertificateError('client certificate not trusted')
 
-    print('Client authenticated')
+    await sendmsg('SCD', writer, aesgcm, server_nonce)
+    print('CLIENT AUTHENTICATED')
+
+    while True:
+        try:
+            await sendmsg(process_command(await readmsg(reader, aesgcm, client_nonce), get_client_info(hashlib.sha256(cert.public_key().public_bytes(encoding=serialization.Encoding.DER, format=serialization.PublicFormat.SubjectPublicKeyInfo)).digest())), writer, aesgcm, server_nonce)
+        except Exception as e:
+            print(f'{str(type(e))[8:-2]}: {e}')
+            break
 
     writer.close()
     await writer.wait_closed()
+    print(f'Connection to {addr} closed')
 
 
 async def main():

server/utils/clients_management/chclient.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+import dbm
+import sys
+from cryptography import x509
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import serialization
+import hashlib
+import os
+
+if len(sys.argv) < 2:
+    print(f'{sys.argv[0]}: missing key hash')
+    sys.exit(1)
+
+with dbm.open('server/data/conf/client_fingerprints', 'c') as db:
+    if bytes.fromhex(sys.argv[1]) not in db.keys():
+        print(f'{sys.argv[0]}: hash not registered')
+        sys.exit(1) 
+    db[bytes.fromhex(sys.argv[1])] = input(f'New common name [{db[bytes.fromhex(sys.argv[1])].decode()}]: ') or db[bytes.fromhex(sys.argv[1])]
+    db.close()
+
+if os.path.exists('server/data/conf/locks/client_admin_rights.lock'):
+    with open('server/data/conf/locks/client_admin_rights.lock', 'r') as lockf:
+        print(f'{sys.argv[0]}: admin rights file is locked by process {lockf.read()}')
+        lockf.close()
+        sys.exit(1)
+
+try:
+    with open('server/data/conf/locks/client_admin_rights.lock', 'w') as lockf:
+        lockf.write(str(os.getpid()))
+        lockf.close()
+
+    with open('server/data/conf/client_admin_rights', 'r') as carf:
+        admins = {kh for kh in carf.read().split('\n') if kh}
+        carf.close()
+
+    admin = input(f'Is admin (y/n) [{'y' if sys.argv[1] in admins else 'n'}]: ') or ('y' if sys.argv[1] in admins else 'n')
+    if admin == 'y':
+        admin = True
+    else:
+        admin = False
+    if admin:
+        if sys.argv[1] not in admins:
+            print(f'Added {sys.argv[1]} to the admins')
+        admins.add(sys.argv[1])
+    else:
+        try:
+            admins.remove(sys.argv[1])
+        except KeyError:
+            pass
+    with open('server/data/conf/client_admin_rights', 'w') as carf:
+        carf.write('\n'.join(admins))
+        carf.close()
+
+finally:
+    os.remove('server/data/conf/locks/client_admin_rights.lock')

server/utils/clients_management/lsclients.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+sys.path.append(os.getcwd())
+import dbm
+from lib.terminal_table import ascii_table
+
+with open('server/data/conf/client_admin_rights', 'r') as carf:
+    admins = {kh for kh in carf.read().split('\n') if kh}
+    carf.close()
+
+with dbm.open('server/data/conf/client_fingerprints', 'c') as db:
+    print(ascii_table([{
+        'Key Hash': k.hex(),
+        'Common name': v.decode(),
+        'Is admin': 'yes' if k.hex() in admins else 'no'
+    } for k, v in db.items()], ))
+    db.close()

server/utils/clients_management/mkclient.py

@@ -17,6 +17,6 @@ except:
     print(f'{sys.argv[0]}: invalid certificate')
     sys.exit(1)
 
-with dbm.open('server/config/clients/fingerprints', 'c') as db:
+with dbm.open('server/data/conf/client_fingerprints', 'c') as db:
     db[hashlib.sha256(cert.public_key().public_bytes(encoding=serialization.Encoding.DER, format=serialization.PublicFormat.SubjectPublicKeyInfo)).digest()] = sys.argv[1]
     db.close()

server/utils/clients_management/rmclient.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+sys.path.append(os.getcwd())
+import dbm
+from lib.terminal_table import ascii_table
+
+if len(sys.argv) < 2:
+    print(f'{sys.argv[0]}: missing key hash')
+    sys.exit(1)
+
+with dbm.open('server/data/conf/client_fingerprints', 'c') as db:
+    try:
+        del db[bytes.fromhex(sys.argv[1])]
+    except:
+        print(f'{sys.argv[0]}: hash not registered')
+        sys.exit(1)
+    db.close()
+
+if os.path.exists('server/data/conf/locks/client_admin_rights.lock'):
+    with open('server/data/conf/locks/client_admin_rights.lock', 'r') as lockf:
+        print(f'{sys.argv[0]}: admin rights file is locked by process {lockf.read()}')
+        lockf.close()
+        sys.exit(1)
+
+try:
+    with open('server/data/conf/locks/client_admin_rights.lock', 'w') as lockf:
+        lockf.write(str(os.getpid()))
+        lockf.close()
+
+    with open('server/data/conf/client_admin_rights', 'r') as carf:
+        admins = {kh for kh in carf.read().split('\n') if kh}
+        carf.close()
+
+    if sys.argv[1] in admins:
+        admins.remove(sys.argv[1])
+        with open('server/data/conf/client_admin_rights', 'w') as carf:
+            carf.write('\n'.join(admins))
+            carf.close()
+
+finally:
+    os.remove('server/data/conf/locks/client_admin_rights.lock')

server/utils/topics_management/lstopics.py

@@ -5,10 +5,11 @@ import os
 sys.path.append(os.getcwd())
 import dbm
 from lib.terminal_table import ascii_table
+import pickle
 
-with dbm.open('server/config/clients/fingerprints', 'c') as db:
+with dbm.open('server/data/conf/topics', 'c') as db:
     print(ascii_table([{
-        'Key Hash': k.hex(),
-        'Common name': v.decode()
+        'Name': k.decode(),
+        'Partitions': str(pickle.loads(v['partitions'])),
     } for k, v in db.items()], ))
     db.close()