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 X-OriginatorOrg: suse.com X-MS-Exchange-CrossTenant-Network-Message-Id: 476a4147-464a-4efb-8710-08d91c6d423a X-MS-Exchange-CrossTenant-AuthSource: VI1PR0402MB3359.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 May 2021 15:29:43.9050 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: f7a17af6-1c5c-4a36-aa8b-f5be247aa4ba X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Dn8Tncj+uucVHeG1acdPr7EjVOYtOQ7bPvP8kIZf1xI8EfxLnb2XzneXRXSM+4bs X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB6909 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org From: Aurelien Aptel * try new one first, fall back on old one otherwise => retrocompatible * use better cipher descriptions Signed-off-by: Aurelien Aptel --- smbinfo | 79 +++++++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 63 insertions(+), 16 deletions(-) diff --git a/smbinfo b/smbinfo index b96fdbc..73c5bb3 100755 --- a/smbinfo +++ b/smbinfo @@ -34,6 +34,7 @@ VERBOSE = False CIFS_QUERY_INFO = 0xc018cf07 CIFS_ENUMERATE_SNAPSHOTS = 0x800ccf06 CIFS_DUMP_KEY = 0xc03acf08 +CIFS_DUMP_FULL_KEY = 0xc011cf0a # large enough input buffer length INPUT_BUFFER_LENGTH = 16384 @@ -192,9 +193,11 @@ ACE_FLAGS = [ ] CIPHER_TYPES = [ - (0x00, "SMB3.0 CCM encryption"), - (0x01, "CCM encryption"), - (0x02, "GCM encryption"), + (0x00, "AES-128-CCM"), + (0x01, "AES-128-CCM"), + (0x02, "AES-128-GCM"), + (0x03, "AES-256-CCM"), + (0x04, "AES-256-GCM"), ] def main(): @@ -799,35 +802,79 @@ class KeyDebugInfoStruct: def __init__(self): self.suid = bytearray() self.cipher = 0 - self.auth_key = bytearray() + self.session_key = bytearray() self.enc_key = bytearray() self.dec_key = bytearray() def ioctl(self, fd): buf = bytearray() buf.extend(struct.pack("= 8s H 16s 16s 16s", self.suid, self.cipher, - self.auth_key, self.enc_key, self.dec_key)) + self.session_key, self.enc_key, self.dec_key)) fcntl.ioctl(fd, CIFS_DUMP_KEY, buf, True) - (self.suid, self.cipher, self.auth_key, + (self.suid, self.cipher, self.session_key, self.enc_key, self.dec_key) = struct.unpack_from('= 8s H 16s 16s 16s', buf, 0) +class FullKeyDebugInfoStruct: + def __init__(self): + # lets pick something large to be future proof + # 17 + 3*32 would be strict minimum as of linux 5.13 + self.in_size = 1024 + self.suid = bytearray() + self.cipher = 0 + self.session_key_len = 0 + self.server_in_key_len = 0 + self.server_out_key_len = 0 + + def ioctl(self, fd): + fmt = "= I 8s H B B B" + size = struct.calcsize(fmt) + buf = bytearray() + buf.extend(struct.pack(fmt, self.in_size, self.suid, self.cipher, + self.session_key_len, self.server_in_key_len, self.server_out_key_len)) + buf.extend(bytearray(self.in_size-size)) + fcntl.ioctl(fd, CIFS_DUMP_FULL_KEY, buf, True) + (self.in_size, self.suid, self.cipher, + self.session_key_len, self.server_in_key_len, + self.server_out_key_len) = struct.unpack_from(fmt, buf, 0) + + end = size + self.session_key = buf[end:end+self.session_key_len] + end += self.session_key_len + self.server_in_key = buf[end:end+self.server_in_key_len] + end += self.server_in_key_len + self.server_out_key = buf[end:end+self.server_out_key_len] + def bytes_to_hex(buf): return " ".join(["%02x"%x for x in buf]) def cmd_keys(args): - kd = KeyDebugInfoStruct() + fd = os.open(args.file, os.O_RDONLY) + kd = FullKeyDebugInfoStruct() + try: - fd = os.open(args.file, os.O_RDONLY) + # try new call first kd.ioctl(fd) except Exception as e: - print("syscall failed: %s"%e) - return False - - print("Session Id: %s"%bytes_to_hex(kd.suid)) - print("Cipher: %s"%type_to_str(kd.cipher, CIPHER_TYPES, verbose=True)) - print("Session Key: %s"%bytes_to_hex(kd.auth_key)) - print("Encryption key: %s"%bytes_to_hex(kd.enc_key)) - print("Decryption key: %s"%bytes_to_hex(kd.dec_key)) + # new failed, try old call + kd = KeyDebugInfoStruct() + try: + kd.ioctl(fd) + except Exception as e: + # both new and old call failed + print("syscall failed: %s"%e) + return False + print("Session Id: %s"%bytes_to_hex(kd.suid)) + print("Cipher: %s"%type_to_str(kd.cipher, CIPHER_TYPES, verbose=True)) + print("Session Key: %s"%bytes_to_hex(kd.session_key)) + print("Encryption key: %s"%bytes_to_hex(kd.enc_key)) + print("Decryption key: %s"%bytes_to_hex(kd.dec_key)) + else: + # no exception, new call succeeded + print("Session Id: %s"%bytes_to_hex(kd.suid)) + print("Cipher: %s"%type_to_str(kd.cipher, CIPHER_TYPES, verbose=True)) + print("Session Key: %s"%bytes_to_hex(kd.session_key)) + print("ServerIn Key: %s"%bytes_to_hex(kd.server_in_key)) + print("ServerOut key: %s"%bytes_to_hex(kd.server_out_key)) if __name__ == '__main__': main()