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anonymizer: option to skip SRC_IP (-S)/DST_IP (-D) #236

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Aug 30, 2024
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anonymizer: option to skip SRC_IP (-S)/DST_IP (-D) #236

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2 changes: 2 additions & 0 deletions anonymizer/README
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Original file line number Diff line number Diff line change
Expand Up @@ -28,5 +28,7 @@ Anonymization key: 32 characters long string or 32B sized hex string starting wi

Parameters: -k KEY Specify anonymization key.
-f FILE Specify file containg anonymization key.
-S Disable anonymization of SRC_IP.
-D Disable anonymization of DST_IP.
-M Use MurmurHash3 instead of Rijndael cipher.
-d Switch to de-anonymization mode, i.e. do reverse transofmration of the addresses.
21 changes: 20 additions & 1 deletion anonymizer/anonymizer.c
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Expand Up @@ -6,10 +6,11 @@
* \author Tomas Jansky <[email protected]>
* \author Martin Zadnik <[email protected]>
* \author Tomas Cejka <[email protected]>
* \date 2024
* \date 2017
*/
/*
* Copyright (C) 2013-2018 CESNET
* Copyright (C) 2013-2024 CESNET
*
* LICENSE TERMS
*
Expand Down Expand Up @@ -71,10 +72,15 @@ trap_module_info_t *module_info = NULL;
PARAM('k', "key", "Specify secret key, the key must be 32 characters long string or 32B sized hex string starting with 0x", required_argument, "string") \
PARAM('f', "file", "Specify file containing secret key, the key must be 32 characters long string or 32B sized hex string starting with 0x", required_argument, "string") \
PARAM('M', "murmur", "Use MurmurHash3 instead of Rijndael cipher.", no_argument, "none") \
PARAM('S', "srcip", "Disable anonymization of SRC_IP.", no_argument, "none") \
PARAM('D', "dstip", "Disable anonymization of DST_IP.", no_argument, "none") \
PARAM('d', "de-anonym", "Switch to de-anonymization mode.", no_argument, "none")

static int stop = 0;

static int disable_src_ip = 0;
static int disable_dst_ip = 0;

TRAP_DEFAULT_SIGNAL_HANDLER(stop = 1);

const char *anon_field_names[] = {"SRC_IP", "DST_IP", "SIP_CALLED_PARTY", "SIP_CALLING_PARTY", "SIP_CALL_ID", "SIP_REQUEST_URI", "SIP_VIA"};
Expand Down Expand Up @@ -331,6 +337,13 @@ int set_fields_present(ur_template_t *tmplt)
int j = 0;

for (i = 0; i < ANON_FIELDS_COUNT; i++) {
// check skip flags for src_ip and dst_ip (-S / -D) and skip these fields
if (disable_src_ip == 1 && strncmp(anon_field_names[i], "SRC_IP", 7) == 0) {
continue;
}
if (disable_dst_ip == 1 && strncmp(anon_field_names[i], "DST_IP", 7) == 0) {
continue;
}
anon_fields[j] = ur_get_id_by_name(anon_field_names[i]);
if (anon_fields[j] != UR_E_INVALID_NAME && ur_is_present(tmplt, anon_fields[j])) {
j++;
Expand Down Expand Up @@ -415,6 +428,12 @@ int main(int argc, char **argv)
case 'd':
mode = DEANONYMIZATION;
break;
case 'S':
disable_src_ip = 1;
break;
case 'D':
disable_dst_ip = 1;
break;
default:
fprintf(stderr, "Invalid arguments.\n");
ret = 1;
Expand Down
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