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Diffstat (limited to 'src/lib/protocols/tls.c')
-rw-r--r--src/lib/protocols/tls.c80
1 files changed, 50 insertions, 30 deletions
diff --git a/src/lib/protocols/tls.c b/src/lib/protocols/tls.c
index a75e26eb2..da29466e8 100644
--- a/src/lib/protocols/tls.c
+++ b/src/lib/protocols/tls.c
@@ -241,7 +241,7 @@ static int extractRDNSequence(struct ndpi_packet_struct *packet,
char *str;
u_int len, j;
- if (*rdnSeqBuf_offset >= rdnSeqBuf_len) {
+ if(*rdnSeqBuf_offset >= rdnSeqBuf_len) {
#ifdef DEBUG_TLS
printf("[TLS] %s() [buffer capacity reached][%u]\n",
__FUNCTION__, rdnSeqBuf_len);
@@ -393,7 +393,7 @@ static void processCertificateElements(struct ndpi_detection_module_struct *ndpi
if(rdn_len && (flow->protos.tls_quic.issuerDN == NULL)) {
flow->protos.tls_quic.issuerDN = ndpi_strdup(rdnSeqBuf);
- if (ndpi_is_printable_string(rdnSeqBuf, rdn_len) == 0) {
+ if(ndpi_is_printable_string(rdnSeqBuf, rdn_len) == 0) {
ndpi_set_risk(ndpi_struct, flow, NDPI_INVALID_CHARACTERS);
}
}
@@ -463,7 +463,7 @@ static void processCertificateElements(struct ndpi_detection_module_struct *ndpi
}
}
- if (flow->protos.tls_quic.notBefore > TLS_LIMIT_DATE)
+ if(flow->protos.tls_quic.notBefore > TLS_LIMIT_DATE)
if((flow->protos.tls_quic.notAfter-flow->protos.tls_quic.notBefore) > TLS_THRESHOLD)
ndpi_set_risk(ndpi_struct, flow, NDPI_TLS_CERT_VALIDITY_TOO_LONG); /* Certificate validity longer than 13 months*/
@@ -499,7 +499,13 @@ static void processCertificateElements(struct ndpi_detection_module_struct *ndpi
i++;
while(i < packet->payload_packet_len) {
- if(packet->payload[i] == 0x82) {
+ u_int8_t general_name_type = packet->payload[i];
+
+ if((general_name_type == 0x81) /* rfc822Name */
+ || (general_name_type == 0x82) /* dNSName */
+ || (general_name_type == 0x87) /* ipAddress */
+ )
+ {
if((i < (packet->payload_packet_len - 1))
&& ((i + packet->payload[i + 1] + 2) < packet->payload_packet_len)) {
u_int8_t len = packet->payload[i + 1];
@@ -513,9 +519,24 @@ static void processCertificateElements(struct ndpi_detection_module_struct *ndpi
|| ((i+len) > packet->payload_packet_len))
break;
- strncpy(dNSName, (const char*)&packet->payload[i], len);
- dNSName[len] = '\0';
-
+ if(general_name_type == 0x87) {
+ if(len == 4 /* IPv4 */) {
+ snprintf(dNSName, sizeof(dNSName), "%u.%u.%u.%u",
+ packet->payload[i] & 0xFF,
+ packet->payload[i+1] & 0xFF,
+ packet->payload[i+2] & 0xFF,
+ packet->payload[i+3] & 0xFF);
+ } else {
+ /*
+ TODO add IPv6 support when able to have
+ a pcap file for coding
+ */
+ }
+ } else {
+ strncpy(dNSName, (const char*)&packet->payload[i], len);
+ dNSName[len] = '\0';
+ }
+
cleanupServerName(dNSName, len);
#if DEBUG_TLS
@@ -523,9 +544,8 @@ static void processCertificateElements(struct ndpi_detection_module_struct *ndpi
flow->host_server_name, len,
packet->payload_packet_len-i-len);
#endif
- if (ndpi_is_printable_string(dNSName, len) == 0) {
- ndpi_set_risk(ndpi_struct, flow, NDPI_INVALID_CHARACTERS);
- }
+ if(ndpi_is_printable_string(dNSName, len) == 0)
+ ndpi_set_risk(ndpi_struct, flow, NDPI_INVALID_CHARACTERS);
if(matched_name == 0) {
#if DEBUG_TLS
@@ -536,13 +556,13 @@ static void processCertificateElements(struct ndpi_detection_module_struct *ndpi
if(flow->host_server_name[0] == '\0') {
matched_name = 1; /* No SNI */
- } else if (dNSName[0] == '*') {
+ } else if(dNSName[0] == '*') {
char * label = strstr(flow->host_server_name, &dNSName[1]);
- if (label != NULL) {
+ if(label != NULL) {
char * first_dot = strchr(flow->host_server_name, '.');
- if (first_dot == NULL || first_dot >= label) {
+ if(first_dot == NULL || first_dot >= label) {
matched_name = 1;
}
}
@@ -739,7 +759,7 @@ int processCertificate(struct ndpi_detection_module_struct *ndpi_struct,
printf("[TLS] SHA-1: %s\n", sha1_str);
#endif
- if (ndpi_struct->malicious_sha1_automa.ac_automa != NULL) {
+ if(ndpi_struct->malicious_sha1_automa.ac_automa != NULL) {
u_int16_t rc1 = ndpi_match_string(ndpi_struct->malicious_sha1_automa.ac_automa, sha1_str);
if(rc1 > 0)
@@ -801,7 +821,7 @@ static int processTLSBlock(struct ndpi_detection_module_struct *ndpi_struct,
* ndpi_int_tls_add_connection has been called */
if(flow->protos.tls_quic.hello_processed) {
ret = processCertificate(ndpi_struct, flow);
- if (ret != 1) {
+ if(ret != 1) {
#ifdef DEBUG_TLS
printf("[TLS] Error processing certificate: %d\n", ret);
#endif
@@ -1023,7 +1043,7 @@ static int ndpi_search_tls_udp(struct ndpi_detection_module_struct *ndpi_struct,
#ifdef DEBUG_TLS
printf("[TLS] DTLS block len: %d\n", block_len);
#endif
- if (block_len == 0 || (processed + block_len + 12 >= p_len)) {
+ if(block_len == 0 || (processed + block_len + 12 >= p_len)) {
#ifdef DEBUG_TLS
printf("[TLS] DTLS invalid block len %d (processed %d, p_len %d)\n",
block_len, processed, p_len);
@@ -1033,7 +1053,7 @@ static int ndpi_search_tls_udp(struct ndpi_detection_module_struct *ndpi_struct,
}
/* We process only handshake msgs */
if(block[0] == 0x16) {
- if (processed + block_len + 13 > p_len) {
+ if(processed + block_len + 13 > p_len) {
#ifdef DEBUG_TLS
printf("[TLS] DTLS invalid len %d %d %d\n", processed, block_len, p_len);
#endif
@@ -1041,7 +1061,7 @@ static int ndpi_search_tls_udp(struct ndpi_detection_module_struct *ndpi_struct,
break;
}
/* TODO: handle (certificate) fragments */
- if (block_len > 16) {
+ if(block_len > 16) {
handshake_len = (block[14] << 16) + (block[15] << 8) + block[16];
if((handshake_len + 12) != block_len) {
#ifdef DEBUG_TLS
@@ -1165,7 +1185,7 @@ static void checkExtensions(struct ndpi_detection_module_struct *ndpi_struct,
{
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
- if (extension_payload_offset + extension_len > packet->payload_packet_len)
+ if(extension_payload_offset + extension_len > packet->payload_packet_len)
{
#ifdef DEBUG_TLS
printf("[TLS] extension length exceeds remaining packet length: %u > %u.\n",
@@ -1192,18 +1212,18 @@ static void checkExtensions(struct ndpi_detection_module_struct *ndpi_struct,
sizeof(allowed_non_iana_extensions[0]);
/* see: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml */
- if (extension_id > 59 && extension_id != 65281)
+ if(extension_id > 59 && extension_id != 65281)
{
u_int8_t extension_found = 0;
for (size_t i = 0; i < allowed_non_iana_extensions_size; ++i)
{
- if (allowed_non_iana_extensions[i] == extension_id)
+ if(allowed_non_iana_extensions[i] == extension_id)
{
extension_found = 1;
break;
}
}
- if (extension_found == 0)
+ if(extension_found == 0)
{
#ifdef DEBUG_TLS
printf("[TLS] suspicious extension id: %u\n", extension_id);
@@ -1214,9 +1234,9 @@ static void checkExtensions(struct ndpi_detection_module_struct *ndpi_struct,
}
/* Check for DTLS-only extensions. */
- if (is_dtls == 0)
+ if(is_dtls == 0)
{
- if (extension_id == 53 || extension_id == 54)
+ if(extension_id == 53 || extension_id == 54)
{
#ifdef DEBUG_TLS
printf("[TLS] suspicious DTLS-only extension id: %u\n", extension_id);
@@ -1335,7 +1355,7 @@ int processClientServerHello(struct ndpi_detection_module_struct *ndpi_struct,
extension_id = ntohs(*((u_int16_t*)&packet->payload[offset]));
extension_len = ntohs(*((u_int16_t*)&packet->payload[offset+2]));
- if (offset+4+extension_len > packet->payload_packet_len) {
+ if(offset+4+extension_len > packet->payload_packet_len) {
break;
}
@@ -1371,7 +1391,7 @@ int processClientServerHello(struct ndpi_detection_module_struct *ndpi_struct,
s_offset += 2;
tot_alpn_len += s_offset;
- if (tot_alpn_len > packet->payload_packet_len)
+ if(tot_alpn_len > packet->payload_packet_len)
return 0;
while(s_offset < tot_alpn_len && s_offset < total_len) {
@@ -1409,7 +1429,7 @@ int processClientServerHello(struct ndpi_detection_module_struct *ndpi_struct,
#ifdef DEBUG_TLS
printf("Server TLS [ALPN: %s][len: %u]\n", alpn_str, alpn_str_len);
#endif
- if (ndpi_is_printable_string(alpn_str, alpn_str_len) == 0)
+ if(ndpi_is_printable_string(alpn_str, alpn_str_len) == 0)
ndpi_set_risk(ndpi_struct, flow, NDPI_INVALID_CHARACTERS);
if(flow->protos.tls_quic.alpn == NULL)
@@ -1725,7 +1745,7 @@ int processClientServerHello(struct ndpi_detection_module_struct *ndpi_struct,
#ifdef DEBUG_TLS
printf("[TLS] SNI: [%s]\n", sni);
#endif
- if (ndpi_is_printable_string(sni, sni_len) == 0)
+ if(ndpi_is_printable_string(sni, sni_len) == 0)
{
ndpi_set_risk(ndpi_struct, flow, NDPI_INVALID_CHARACTERS);
}
@@ -1938,7 +1958,7 @@ int processClientServerHello(struct ndpi_detection_module_struct *ndpi_struct,
duplicate_found);
#endif
- if (i > 0 && i >= tot_signature_algorithms_len) {
+ if(i > 0 && i >= tot_signature_algorithms_len) {
ja3.client.signature_algorithms[i*2 - 1] = '\0';
} else {
ja3.client.signature_algorithms[i*2] = '\0';
@@ -2067,7 +2087,7 @@ int processClientServerHello(struct ndpi_detection_module_struct *ndpi_struct,
/* Key Share Entry */
e_offset += 2; /* Group */
- if (e_offset + 2 < packet->payload_packet_len) {
+ if(e_offset + 2 < packet->payload_packet_len) {
e_offset += ntohs(*((u_int16_t*)&packet->payload[e_offset])) + 2; /* Lenght */
if((e_offset+4) < packet->payload_packet_len) {
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