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Diffstat (limited to 'src/lib/ndpi_main.c')
-rw-r--r--src/lib/ndpi_main.c83
1 files changed, 66 insertions, 17 deletions
diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c
index fc898d4b8..e200f32f0 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -2690,7 +2690,7 @@ u_int16_t ndpi_guess_protocol_id(struct ndpi_detection_module_struct *ndpi_struc
u_int8_t proto, u_int16_t sport, u_int16_t dport,
u_int8_t *user_defined_proto) {
*user_defined_proto = 0; /* Default */
-
+
if(sport && dport) {
ndpi_default_ports_tree_node_t *found = ndpi_get_guessed_protocol_id(ndpi_struct, proto, sport, dport);
@@ -3913,7 +3913,7 @@ void ndpi_connection_tracking(struct ndpi_detection_module_struct *ndpi_struct,
if(tcph->ack != 0) {
flow->next_tcp_seq_nr[flow->packet.packet_direction] =
ntohl(tcph->seq) + (tcph->syn ? 1 : packet->payload_packet_len);
-
+
flow->next_tcp_seq_nr[1 -flow->packet.packet_direction] = ntohl(tcph->ack_seq);
}
} else if(packet->payload_packet_len > 0) {
@@ -4178,7 +4178,7 @@ static ndpi_protocol ndpi_process_partial_detection(struct ndpi_detection_module
ret.app_protocol = ret.master_protocol;
ndpi_fill_protocol_category(ndpi_struct, flow, &ret);
-
+
ndpi_int_change_protocol(ndpi_struct, flow, ret.app_protocol, ret.master_protocol);
return(ret);
@@ -4275,17 +4275,17 @@ ndpi_protocol ndpi_detection_giveup(struct ndpi_detection_module_struct *ndpi_st
if(flow->host_server_name[0] != '\0') {
ndpi_protocol_match_result ret_match;
-
+
ndpi_match_host_subprotocol(ndpi_struct, flow,
(char *)flow->host_server_name,
strlen((const char*)flow->host_server_name),
&ret_match,
NDPI_PROTOCOL_DNS);
-
+
if(ret_match.protocol_id != NDPI_PROTOCOL_UNKNOWN)
guessed_host_protocol_id = ret_match.protocol_id;
}
-
+
ndpi_int_change_protocol(ndpi_struct, flow,
guessed_host_protocol_id,
guessed_protocol_id);
@@ -4584,7 +4584,7 @@ int ndpi_fill_ip_protocol_category(struct ndpi_detection_module_struct *ndpi_str
return 1;
}
}
-
+
ret->category = ndpi_get_proto_category(ndpi_struct, *ret);
return 0;
@@ -4599,7 +4599,7 @@ void ndpi_fill_protocol_category(struct ndpi_detection_module_struct *ndpi_struc
if(flow->guessed_header_category != NDPI_PROTOCOL_CATEGORY_UNSPECIFIED) {
flow->category = ret->category = flow->guessed_header_category;
return;
- }
+ }
if(flow->host_server_name[0] != '\0') {
unsigned long id;
@@ -4653,7 +4653,7 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
if(flow->detected_protocol_stack[0] != NDPI_PROTOCOL_UNKNOWN) {
/*
With SSL we might want to dissect further packets to decode
- the certificate type for instance
+ the certificate type for instance
*/
if(flow->check_extra_packets
/*
@@ -4667,7 +4667,7 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
} else
goto ret_protocols;
}
-
+
/* need at least 20 bytes for ip header */
if(packetlen < 20) {
/* reset protocol which is normally done in init_packet_header */
@@ -4683,7 +4683,7 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
/* we are interested in ipv4 packet */
if(ndpi_init_packet_header(ndpi_struct, flow, packetlen) != 0)
- goto invalidate_ptr;
+ goto invalidate_ptr;
/* detect traffic for tcp or udp only */
flow->src = src, flow->dst = dst;
@@ -4745,12 +4745,12 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
if(ndpi_struct->custom_categories.categories_loaded && flow->packet.iph) {
ndpi_protocol ret = { NDPI_PROTOCOL_UNKNOWN, NDPI_PROTOCOL_UNKNOWN, NDPI_PROTOCOL_CATEGORY_UNSPECIFIED };
-
+
ndpi_fill_ip_protocol_category(ndpi_struct, flow->packet.iph->saddr, flow->packet.iph->daddr, &ret);
flow->guessed_header_category = ret.category;
} else
flow->guessed_header_category = NDPI_PROTOCOL_CATEGORY_UNSPECIFIED;
-
+
if(flow->guessed_protocol_id >= (NDPI_MAX_SUPPORTED_PROTOCOLS-1)) {
/* This is a custom protocol and it has priority over everything else */
ret.master_protocol = NDPI_PROTOCOL_UNKNOWN,
@@ -4797,7 +4797,7 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
ndpi_check_flow_func(ndpi_struct, flow, &ndpi_selection_packet);
ndpi_fill_protocol_category(ndpi_struct, flow, &ret);
- goto invalidate_ptr;
+ goto invalidate_ptr;
}
ndpi_check_flow_func(ndpi_struct, flow, &ndpi_selection_packet);
@@ -4812,7 +4812,7 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
for(i=0; i<sizeof(flow->host_server_name); i++) {
if(flow->host_server_name[i] != '\0')
flow->host_server_name[i] = tolower(flow->host_server_name[i]);
- else {
+ else {
flow->host_server_name[i] ='\0';
break;
}
@@ -4848,12 +4848,12 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
}
invalidate_ptr:
- /*
+ /*
Invalidate packet memory to avoid accessing the pointers below
when the packet is no longer accessible
*/
flow->packet.iph = NULL, flow->packet.tcp = NULL, flow->packet.udp = NULL;
-
+
return(ret);
}
@@ -6406,3 +6406,52 @@ int ndpi_flowv6_flow_hash(u_int8_t l4_proto, struct ndpi_in6_addr *src_ip, struc
}
/* **************************************** */
+
+/* **************************************** */
+
+struct cipher_weakness {
+ u_int16_t cipher_id;
+ ndpi_cipher_weakness weakness_type;
+};
+
+static struct cipher_weakness safe_ssl_ciphers[] = {
+ /* https://community.qualys.com/thread/18212-how-does-qualys-determine-the-server-cipher-suites */
+ /* INSECURE */
+ { 0xc011, NDPI_CIPHER_INSECURE }, /* TLS_ECDHE_RSA_WITH_RC4_128_SHA */
+ { 0x0005, NDPI_CIPHER_INSECURE }, /* TLS_RSA_WITH_RC4_128_SHA */
+ { 0x0004, NDPI_CIPHER_INSECURE }, /* TLS_RSA_WITH_RC4_128_MD5 */
+ /* WEAK */
+ { 0x009d, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_AES_256_GCM_SHA384 */
+ { 0x003d, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_AES_256_CBC_SHA256 */
+ { 0x0035, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_AES_256_CBC_SHA */
+ { 0x0084, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_CAMELLIA_256_CBC_SHA */
+ { 0x009c, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_AES_128_GCM_SHA256 */
+ { 0x003c, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_AES_128_CBC_SHA256 */
+ { 0x002f, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_AES_128_CBC_SHA */
+ { 0x0041, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_CAMELLIA_128_CBC_SHA */
+ { 0xc012, NDPI_CIPHER_WEAK }, /* TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA */
+ { 0x0016, NDPI_CIPHER_WEAK }, /* TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA */
+ { 0x000a, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_3DES_EDE_CBC_SHA */
+ { 0x0096, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_SEED_CBC_SHA */
+ { 0x0007, NDPI_CIPHER_WEAK }, /* TLS_RSA_WITH_IDEA_CBC_SHA */
+
+ { 0x0, NDPI_CIPHER_SAFE } /* END */
+};
+
+u_int8_t ndpi_is_safe_ssl_cipher(u_int16_t cipher) {
+ u_int i;
+
+ for(i=0; safe_ssl_ciphers[i].cipher_id != 0; i++) {
+ if(safe_ssl_ciphers[i].cipher_id == cipher) {
+#ifdef CERTIFICATE_DEBUG
+ printf("%s %s(%04X / %u)\n",
+ (safe_ssl_ciphers[i].weakness_type == NDPI_CIPHER_WEAK) ? "WEAK" : "INSECURE",
+ __FUNCTION__, cipher, cipher);
+#endif
+
+ return(safe_ssl_ciphers[i].weakness_type);
+ }
+ }
+
+ return(NDPI_CIPHER_SAFE); /* We're safe */
+}
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