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Added interface for SSL_CTX_set_info_callback() 

* dtls/openssl.py:
	- Added methods SSL_CTX_set_info_callback(), SSL_state_string_long(), SSL_alert_type_string_long() and SSL_alert_desc_string_long()
	- Added constants for state and error evaluation during callback
* dtls/sslconnection.py: Added _ssl_logging_cb() as default callback function - only outputs messages when logger is active
incoming
mcfreis 2017-03-20 14:27:23 +01:00
parent d601774e24
commit 70e78b97cb
3 changed files with 166 additions and 20 deletions
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9
ChangeLog
View File

@ -1,3 +1,12 @@
2017-03-17 Björn Freise <mcfreis@gmx.net>
Added interface for SSL_CTX_set_info_callback()
* dtls/openssl.py:
- Added methods SSL_CTX_set_info_callback(), SSL_state_string_long(), SSL_alert_type_string_long() and SSL_alert_desc_string_long()
- Added constants for state and error evaluation during callback
* dtls/sslconnection.py: Added _ssl_logging_cb() as default callback function - only outputs messages when logger is active
2017-03-17 Björn Freise <mcfreis@gmx.net>
SSL_write() extended to handle ctypes.Array as data

84
dtls/openssl.py
View File

@ -102,6 +102,31 @@ GEN_DIRNAME = 4
NID_subject_alt_name = 85
CRYPTO_LOCK = 1
SSL_ST_MASK = 0x0FFF
SSL_ST_CONNECT = 0x1000
SSL_ST_ACCEPT = 0x2000
SSL_ST_INIT = (SSL_ST_CONNECT | SSL_ST_ACCEPT)
SSL_ST_BEFORE = 0x4000
SSL_ST_OK = 0x03
SSL_ST_RENEGOTIATE = (0x04 | SSL_ST_INIT)
SSL_ST_ERR = 0x05
SSL_CB_LOOP = 0x01
SSL_CB_EXIT = 0x02
SSL_CB_READ = 0x04
SSL_CB_WRITE = 0x08
SSL_CB_ALERT = 0x4000
SSL_CB_READ_ALERT = (SSL_CB_ALERT | SSL_CB_READ)
SSL_CB_WRITE_ALERT = (SSL_CB_ALERT | SSL_CB_WRITE)
SSL_CB_ACCEPT_LOOP = (SSL_ST_ACCEPT | SSL_CB_LOOP)
SSL_CB_ACCEPT_EXIT = (SSL_ST_ACCEPT | SSL_CB_EXIT)
SSL_CB_CONNECT_LOOP = (SSL_ST_CONNECT | SSL_CB_LOOP)
SSL_CB_CONNECT_EXIT = (SSL_ST_CONNECT | SSL_CB_EXIT)
SSL_CB_HANDSHAKE_START = 0x10
SSL_CB_HANDSHAKE_DONE = 0x20
#
# Integer constants - internal
#
@ -486,6 +511,12 @@ __all__ = [
"SSL_SESS_CACHE_SERVER", "SSL_SESS_CACHE_BOTH",
"SSL_SESS_CACHE_NO_AUTO_CLEAR", "SSL_SESS_CACHE_NO_INTERNAL_LOOKUP",
"SSL_SESS_CACHE_NO_INTERNAL_STORE", "SSL_SESS_CACHE_NO_INTERNAL",
"SSL_ST_MASK", "SSL_ST_CONNECT", "SSL_ST_ACCEPT", "SSL_ST_INIT", "SSL_ST_BEFORE", "SSL_ST_OK",
"SSL_ST_RENEGOTIATE", "SSL_ST_ERR", "SSL_CB_LOOP", "SSL_CB_EXIT", "SSL_CB_READ", "SSL_CB_WRITE",
"SSL_CB_ALERT", "SSL_CB_READ_ALERT", "SSL_CB_WRITE_ALERT",
"SSL_CB_ACCEPT_LOOP", "SSL_CB_ACCEPT_EXIT",
"SSL_CB_CONNECT_LOOP", "SSL_CB_CONNECT_EXIT",
"SSL_CB_HANDSHAKE_START", "SSL_CB_HANDSHAKE_DONE",
"SSL_FILE_TYPE_PEM",
"GEN_DIRNAME", "NID_subject_alt_name",
"CRYPTO_LOCK",
@ -499,7 +530,9 @@ __all__ = [
"BIO_set_nbio",
"SSL_CTX_set_session_cache_mode", "SSL_CTX_set_read_ahead",
"SSL_CTX_set_options",
"SSL_CTX_set_info_callback",
"SSL_read", "SSL_write",
"SSL_state_string_long", "SSL_alert_type_string_long", "SSL_alert_desc_string_long",
"SSL_CTX_set_cookie_cb",
"OBJ_obj2txt", "decode_ASN1_STRING", "ASN1_TIME_print",
"X509_get_notAfter",
@ -536,6 +569,8 @@ map(lambda x: _make_function(*x), (
((None, "ret"), (SSLCTX, "ctx"), (c_void_p, "app_gen_cookie_cb")), False),
("SSL_CTX_set_cookie_verify_cb", libssl,
((None, "ret"), (SSLCTX, "ctx"), (c_void_p, "app_verify_cookie_cb")), False),
("SSL_CTX_set_info_callback", libssl,
((None, "ret"), (SSLCTX, "ctx"), (c_void_p, "app_info_cb")), False),
("SSL_new", libssl,
((SSL, "ret"), (SSLCTX, "ctx"))),
("SSL_free", libssl,
@ -568,6 +603,12 @@ map(lambda x: _make_function(*x), (
((None, "ret"), (c_ulong, "e"), (c_char_p, "buf"), (c_size_t, "len")), False),
("SSL_get_error", libssl,
((c_int, "ret"), (SSL, "ssl"), (c_int, "ret")), False, None),
("SSL_state_string_long", libssl,
((c_char_p, "ret"), (SSL, "ssl")), False),
("SSL_alert_type_string_long", libssl,
((c_char_p, "ret"), (c_int, "value")), False),
("SSL_alert_desc_string_long", libssl,
((c_char_p, "ret"), (c_int, "value")), False),
("SSL_CTX_set_cipher_list", libssl,
((c_int, "ret"), (SSLCTX, "ctx"), (c_char_p, "str"))),
("SSL_CTX_use_certificate_file", libssl,
@ -681,6 +722,28 @@ def SSL_CTX_set_options(ctx, options):
# Returns the new option bitmaks after adding the given options
return _SSL_CTX_ctrl(ctx, SSL_CTRL_OPTIONS, options, None)
_rvoid_voidp_int_int = CFUNCTYPE(None, c_void_p, c_int, c_int)
_info_callback = dict()
def SSL_CTX_set_info_callback(ctx, app_info_cb):
"""
Set the info callback
:param callback: The Python callback to use
:return: None
"""
def py_info_callback(ssl, where, ret):
try:
app_info_cb(SSL(ssl), where, ret)
except:
pass
return
global _info_callback
_info_callback[ctx] = _rvoid_voidp_int_int(py_info_callback)
_SSL_CTX_set_info_callback(ctx, _info_callback[ctx])
_rint_voidp_ubytep_uintp = CFUNCTYPE(c_int, c_void_p, POINTER(c_ubyte),
POINTER(c_uint))
_rint_voidp_ubytep_uint = CFUNCTYPE(c_int, c_void_p, POINTER(c_ubyte), c_uint)
@ -778,6 +841,27 @@ def SSL_write(ssl, data):
str_data = str(data)
return _SSL_write(ssl, str_data, len(str_data))
def SSL_state_string_long(ssl):
try:
ret = _SSL_state_string_long(ssl)
except:
pass
return ret
def SSL_alert_type_string_long(value):
try:
ret = _SSL_alert_type_string_long(value)
except:
pass
return ret
def SSL_alert_desc_string_long(value):
try:
ret = _SSL_alert_desc_string_long(value)
except:
pass
return ret
def OBJ_obj2txt(asn1_object, no_name):
buf = create_string_buffer(X509_NAME_MAXLEN)
res_len = _OBJ_obj2txt(buf, sizeof(buf), asn1_object, 1 if no_name else 0)

53
dtls/sslconnection.py
View File

@ -84,6 +84,58 @@ DTLS_OPENSSL_VERSION_INFO = (
DTLS_OPENSSL_VERSION_NUMBER & 0xF) # status
def _ssl_logging_cb(conn, where, return_code):
_state = where & ~SSL_ST_MASK
state = "SSL"
if _state & SSL_ST_INIT == SSL_ST_INIT:
if _state & SSL_ST_RENEGOTIATE == SSL_ST_RENEGOTIATE:
state += "_renew"
else:
state += "_init"
elif _state & SSL_ST_CONNECT:
state += "_connect"
elif _state & SSL_ST_ACCEPT:
state += "_accept"
elif _state == 0:
if where & SSL_CB_HANDSHAKE_START:
state += "_handshake_start"
elif where & SSL_CB_HANDSHAKE_DONE:
state += "_handshake_done"
if where & SSL_CB_LOOP:
state += '_loop'
_logger.debug("%s:%s:%d" % (state,
SSL_state_string_long(conn),
return_code))
elif where & SSL_CB_ALERT:
state += '_alert'
state += "_read" if where & SSL_CB_READ else "_write"
_logger.debug("%s:%s:%s" % (state,
SSL_alert_type_string_long(return_code),
SSL_alert_desc_string_long(return_code)))
elif where & SSL_CB_EXIT:
state += '_exit'
if return_code == 0:
_logger.debug("%s:%s:%d(failed)" % (state,
SSL_state_string_long(conn),
return_code))
elif return_code < 0:
_logger.debug("%s:%s:%d(error)" % (state,
SSL_state_string_long(conn),
return_code))
else:
_logger.debug("%s:%s:%d" % (state,
SSL_state_string_long(conn),
return_code))
else:
_logger.debug("%s:%s:%d" % (state,
SSL_state_string_long(conn),
return_code))
class _CTX(_Rsrc):
"""SSL_CTX wrapper"""
def __init__(self, value):
@ -209,6 +261,7 @@ class SSLConnection(object):
SSL_CTX_set_cipher_list(self._ctx.value, self._ciphers)
except openssl_error() as err:
raise_ssl_error(ERR_NO_CIPHER, err)
SSL_CTX_set_info_callback(self._ctx.value, _ssl_logging_cb)
def _copy_server(self):
source = self._sock