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/* Copyright (c) 2011, NORDUnet A/S */
/* See LICENSE for licensing information. */
#include "fticks.h"
#include "debug.h"
#include "fticks_hashmac.h"
#include <string.h>
int fticks_configure(struct options *options,
uint8_t **reportingp,
uint8_t **macp,
uint8_t **keyp) {
int r = 0;
const char *reporting = (const char *)*reportingp;
const char *mac = (const char *)*macp;
/* Set defaults. */
options->fticks_reporting = RSP_FTICKS_REPORTING_NONE;
options->fticks_mac = RSP_MAC_VENDOR_KEY_HASHED;
if (reporting != NULL) {
if (strcasecmp(reporting, "None") == 0)
options->fticks_reporting = RSP_FTICKS_REPORTING_NONE;
else if (strcasecmp(reporting, "Basic") == 0)
options->fticks_reporting = RSP_FTICKS_REPORTING_BASIC;
else if (strcasecmp(reporting, "Full") == 0)
options->fticks_reporting = RSP_FTICKS_REPORTING_FULL;
else {
debugx(1, DBG_ERR,
"config error: invalid FTicksReporting value: %s",
reporting);
r = 1;
}
}
if (mac != NULL) {
if (strcasecmp(mac, "Static") == 0)
options->fticks_mac = RSP_MAC_STATIC;
else if (strcasecmp(mac, "Original") == 0)
options->fticks_mac = RSP_MAC_ORIGINAL;
else if (strcasecmp(mac, "VendorHashed") == 0)
options->fticks_mac = RSP_MAC_VENDOR_HASHED;
else if (strcasecmp(mac, "VendorKeyHashed") == 0)
options->fticks_mac = RSP_MAC_VENDOR_KEY_HASHED;
else if (strcasecmp(mac, "FullyHashed") == 0)
options->fticks_mac = RSP_MAC_FULLY_HASHED;
else if (strcasecmp(mac, "FullyKeyHashed") == 0)
options->fticks_mac = RSP_MAC_FULLY_KEY_HASHED;
else {
debugx(1, DBG_ERR,
"config error: invalid FTicksMAC value: %s", mac);
r = 1;
}
}
if (*keyp != NULL) {
options->fticks_key = *keyp;
if (options->fticks_mac != RSP_MAC_VENDOR_KEY_HASHED &&
options->fticks_mac != RSP_MAC_FULLY_KEY_HASHED)
debugx(1, DBG_WARN, "config warning: FTicksKey not used");
} else if (options->fticks_reporting != RSP_FTICKS_REPORTING_NONE &&
(options->fticks_mac == RSP_MAC_VENDOR_KEY_HASHED ||
options->fticks_mac == RSP_MAC_FULLY_KEY_HASHED)) {
debugx(1, DBG_ERR,
"config error: FTicksMAC values VendorKeyHashed and "
"FullyKeyHashed require an FTicksKey");
options->fticks_reporting = RSP_FTICKS_REPORTING_NONE;
r = 1;
}
if (*reportingp != NULL) {
free(*reportingp);
*reportingp = NULL;
}
if (*macp != NULL) {
free(*macp);
*macp = NULL;
}
return r;
}
void fticks_log(const struct options *options,
const struct client *client,
const struct radmsg *msg,
const struct request *rq) {
uint8_t *username = NULL;
uint8_t *realm = NULL;
uint8_t visinst[8 + 40 + 1 + 1]; /* Room for 40 octets of VISINST. */
uint8_t *macin = NULL;
uint8_t macout[2 * 32 + 1]; /* Room for ASCII representation of SHA256. */
username = radattr2ascii(radmsg_gettype(rq->msg,
RAD_Attr_User_Name));
if (username != NULL) {
realm = (uint8_t *)strrchr((char *)username, '@');
if (realm != NULL)
realm++;
}
if (realm == NULL)
realm = (uint8_t *)"";
memset(visinst, 0, sizeof(visinst));
if (options->fticks_reporting == RSP_FTICKS_REPORTING_FULL) {
if (client->conf->fticks_visinst != NULL) {
snprintf((char *)visinst, sizeof(visinst), "VISINST=%s#",
client->conf->fticks_visinst);
} else {
snprintf((char *)visinst, sizeof(visinst), "VISINST=%s#",
client->conf->name);
}
}
memset(macout, 0, sizeof(macout));
if (options->fticks_mac == RSP_MAC_STATIC) {
strncpy((char *)macout, "undisclosed", sizeof(macout) - 1);
} else {
macin = radattr2ascii(radmsg_gettype(rq->msg,
RAD_Attr_Calling_Station_Id));
if (macin) {
switch (options->fticks_mac) {
case RSP_MAC_ORIGINAL:
memcpy(macout, macin, sizeof(macout));
break;
case RSP_MAC_VENDOR_HASHED:
memcpy(macout, macin, 9);
fticks_hashmac(macin, NULL, sizeof(macout) - 9, macout + 9);
break;
case RSP_MAC_VENDOR_KEY_HASHED:
memcpy(macout, macin, 9);
/* We are hashing the first nine octets too for easier
* correlation between vendor-key-hashed and
* fully-key-hashed log records. This opens up for a
* known plaintext attack on the key but the
* consequences of that is considered outweighed by
* the convenience gained. */
fticks_hashmac(macin, options->fticks_key,
sizeof(macout) - 9, macout + 9);
break;
case RSP_MAC_FULLY_HASHED:
fticks_hashmac(macin, NULL, sizeof(macout), macout);
break;
case RSP_MAC_FULLY_KEY_HASHED:
fticks_hashmac(macin, options->fticks_key, sizeof(macout),
macout);
break;
default:
debugx(2, DBG_ERR, "invalid fticks mac configuration: %d",
options->fticks_mac);
}
}
}
fticks_debug(
"%s#REALM=%s#VISCOUNTRY=%s#%sCSI=%s#RESULT=%s#",
options->fticksprefix,
realm,
client->conf->fticks_viscountry,
visinst,
macout,
msg->code == RAD_Access_Accept ? "OK" : "FAIL");
if (macin != NULL)
free(macin);
if (username != NULL)
free(username);
}
/* Local Variables: */
/* c-file-style: "stroustrup" */
/* End: */
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