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-rw-r--r--radsecproxy.c195
1 files changed, 64 insertions, 131 deletions
diff --git a/radsecproxy.c b/radsecproxy.c
index ef27a11..9ef349d 100644
--- a/radsecproxy.c
+++ b/radsecproxy.c
@@ -62,8 +62,6 @@
#include "debug.h"
#include "list.h"
#include "hash.h"
-#include "tlv11.h"
-#include "radmsg.h"
#include "util.h"
#include "gconfig.h"
#include "radsecproxy.h"
@@ -902,36 +900,6 @@ int radsign(unsigned char *rad, unsigned char *sec) {
return result;
}
-int createmessageauth(unsigned char *rad, unsigned char *authattrval, char *secret) {
- static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
- static unsigned char first = 1;
- static HMAC_CTX hmacctx;
- unsigned int md_len;
-
- if (!authattrval)
- return 1;
-
- pthread_mutex_lock(&lock);
- if (first) {
- HMAC_CTX_init(&hmacctx);
- first = 0;
- }
-
- memset(authattrval, 0, 16);
- md_len = 0;
- HMAC_Init_ex(&hmacctx, secret, strlen(secret), EVP_md5(), NULL);
- HMAC_Update(&hmacctx, rad, RADLEN(rad));
- HMAC_Final(&hmacctx, authattrval, &md_len);
- if (md_len != 16) {
- debug(DBG_WARN, "message auth computation failed");
- pthread_mutex_unlock(&lock);
- return 0;
- }
-
- pthread_mutex_unlock(&lock);
- return 1;
-}
-
unsigned char *attrget(unsigned char *attrs, int length, uint8_t type) {
while (length > 1) {
if (ATTRTYPE(attrs) == type)
@@ -945,13 +913,14 @@ unsigned char *attrget(unsigned char *attrs, int length, uint8_t type) {
void freerqdata(struct request *rq) {
if (rq->origusername)
free(rq->origusername);
+ if (rq->msg)
+ radmsg_free(rq->msg);
if (rq->buf)
free(rq->buf);
}
void sendrq(struct server *to, struct request *rq) {
int i;
- uint8_t *attr;
pthread_mutex_lock(&to->newrq_mutex);
/* might simplify if only try nextid, might be ok */
@@ -968,11 +937,10 @@ void sendrq(struct server *to, struct request *rq) {
goto exit;
}
}
-
- rq->buf[1] = (char)i;
- attr = attrget(rq->buf + 20, RADLEN(rq->buf) - 20, RAD_Attr_Message_Authenticator);
- if (attr && !createmessageauth(rq->buf, ATTRVAL(attr), to->conf->secret)) {
+ rq->msg->id = (uint8_t)i;
+ rq->buf = radmsg2buf(rq->msg, (uint8_t *)to->conf->secret);
+ if (!rq->buf) {
freerqdata(rq);
goto exit;
}
@@ -994,6 +962,7 @@ void sendrq(struct server *to, struct request *rq) {
debug(DBG_DBG, "sendrq: signalling client writer");
pthread_cond_signal(&to->newrq_cond);
}
+
exit:
pthread_mutex_unlock(&to->newrq_mutex);
}
@@ -1470,7 +1439,7 @@ int dorewriteadd(struct radmsg *msg, struct list *addattrs) {
return 1;
}
-int resizeattr2(struct tlv *attr, uint8_t newlen) {
+int resizeattr(struct tlv *attr, uint8_t newlen) {
uint8_t *newv;
if (newlen != attr->l) {
@@ -1517,7 +1486,7 @@ int dorewritemodattr(struct tlv *attr, struct modattr *modattr) {
return 0;
}
- if (!resizeattr2(attr, reslen)) {
+ if (!resizeattr(attr, reslen)) {
free(in);
return 0;
}
@@ -1596,39 +1565,7 @@ void char2hex(char *h, unsigned char c) {
return;
}
-char *radattr2ascii(char *ascii, size_t len, unsigned char *attr) {
- int i, l;
- char *s, *d;
-
- if (!attr || len == 1) {
- *ascii = '\0';
- return ascii;
- }
-
- l = ATTRVALLEN(attr);
- s = (char *)ATTRVAL(attr);
- d = ascii;
-
- for (i = 0; i < l; i++) {
- if (s[i] > 31 && s[i] < 127) {
- *d++ = s[i];
- if (d - ascii == len - 1)
- break;
- } else {
- if (d - ascii > len - 4)
- break;
- *d++ = '%';
- char2hex(d, s[i]);
- d += 2;
- if (d - ascii == len - 1)
- break;
- }
- }
- *d = '\0';
- return ascii;
-}
-
-uint8_t *radattr2ascii2(struct tlv *attr) {
+uint8_t *radattr2ascii(struct tlv *attr) {
int i, l;
uint8_t *a, *d;
@@ -1667,7 +1604,7 @@ void acclog(struct radmsg *msg, char *host) {
debug(DBG_INFO, "acclog: accounting-request from %s without username attribute", host);
return;
}
- username = radattr2ascii2(attr);
+ username = radattr2ascii(attr);
if (username) {
debug(DBG_INFO, "acclog: accounting-request from %s with username: %s", host, username);
free(username);
@@ -1817,13 +1754,13 @@ int radsrv(struct request *rq) {
debug(DBG_WARN, "radsrv: ignoring access request, no username attribute");
goto exit;
}
-
+
if (rq->from->conf->rewriteusername && !rewriteusername(rq, attr)) {
debug(DBG_WARN, "radsrv: username malloc failed, ignoring request");
goto exit;
}
- userascii = radattr2ascii2(attr);
+ userascii = radattr2ascii(attr);
if (!userascii)
goto exit;
debug(DBG_DBG, "%s with username: %s", radmsgtype2string(msg->code), userascii);
@@ -1844,6 +1781,9 @@ int radsrv(struct request *rq) {
goto exit;
}
+ free(rq->buf);
+ rq->buf = NULL;
+
if (options.loopprevention && !strcmp(rq->from->conf->name, to->conf->name)) {
debug(DBG_INFO, "radsrv: Loop prevented, not forwarding request from client %s to server %s, discarding",
rq->from->conf->name, to->conf->name);
@@ -1888,13 +1828,8 @@ int radsrv(struct request *rq) {
if (to->conf->rewriteout && !dorewrite(msg, to->conf->rewriteout))
goto exit;
- free(rq->buf);
- rq->buf = radmsg2buf(msg);
- if (!rq->buf)
- goto exit;
free(userascii);
- radmsg_free(msg);
-
+ rq->msg = msg;
sendrq(to, rq);
return 1;
@@ -1905,31 +1840,33 @@ int radsrv(struct request *rq) {
return 1;
}
-int replyh(struct server *server, unsigned char *buf) {
+void replyh(struct server *server, unsigned char *buf) {
struct client *from;
struct request *rq;
int sublen;
- unsigned char *subattrs, *rqattr;
+ unsigned char *subattrs;
struct sockaddr_storage fromsa;
- char tmp[760], stationid[760];
+ uint8_t *username, *stationid;
struct radmsg *msg = NULL;
- struct tlv *attr, *messageauth;
+ struct tlv *attr;
struct list_node *node;
server->connectionok = 1;
server->lostrqs = 0;
rq = server->requests + buf[1];
- msg = buf2radmsg(buf, (uint8_t *)server->conf->secret, rq->buf + 4);
+ msg = buf2radmsg(buf, (uint8_t *)server->conf->secret, rq->msg->auth);
+ free(buf);
+ buf = NULL;
if (!msg) {
debug(DBG_WARN, "replyh: message validation failed, ignoring packet");
- return 0;
+ return;
}
if (msg->code != RAD_Access_Accept && msg->code != RAD_Access_Reject && msg->code != RAD_Access_Challenge
&& msg->code != RAD_Accounting_Response) {
debug(DBG_INFO, "replyh: discarding message type %s, accepting only access accept, access reject, access challenge and accounting response messages", radmsgtype2string(msg->code));
radmsg_free(msg);
- return 0;
+ return;
}
debug(DBG_DBG, "got %s message with id %d", radmsgtype2string(msg->code), msg->id);
@@ -1946,7 +1883,7 @@ int replyh(struct server *server, unsigned char *buf) {
gettimeofday(&server->lastrcv, NULL);
- if (*rq->buf == RAD_Status_Server) {
+ if (rq->msg->code == RAD_Status_Server) {
rq->received = 1;
debug(DBG_DBG, "replyh: got status server response from %s", server->conf->host);
goto errunlock;
@@ -1990,16 +1927,16 @@ int replyh(struct server *server, unsigned char *buf) {
}
if (msg->code == RAD_Access_Accept || msg->code == RAD_Access_Reject || msg->code == RAD_Accounting_Response) {
- rqattr = attrget(rq->buf + 20, RADLEN(rq->buf) - 20, RAD_Attr_User_Name);
- if (rqattr) {
- radattr2ascii(tmp, sizeof(tmp), rqattr);
- rqattr = attrget(rq->buf + 20, RADLEN(rq->buf) - 20, RAD_Attr_Calling_Station_Id);
- if (rqattr) {
- radattr2ascii(stationid, sizeof(stationid), rqattr);
+ username = radattr2ascii(radmsg_gettype(rq->msg, RAD_Attr_User_Name));
+ if (username) {
+ stationid = radattr2ascii(radmsg_gettype(rq->msg, RAD_Attr_Calling_Station_Id));
+ if (stationid) {
debug(DBG_INFO, "%s for user %s stationid %s from %s",
- radmsgtype2string(msg->code), tmp, stationid, server->conf->host);
+ radmsgtype2string(msg->code), username, stationid, server->conf->host);
+ free(stationid);
} else
- debug(DBG_INFO, "%s for user %s from %s", radmsgtype2string(msg->code), tmp, server->conf->host);
+ debug(DBG_INFO, "%s for user %s from %s", radmsgtype2string(msg->code), username, server->conf->host);
+ free(username);
}
}
@@ -2011,7 +1948,7 @@ int replyh(struct server *server, unsigned char *buf) {
#endif
if (rq->origusername && (attr = radmsg_gettype(msg, RAD_Attr_User_Name))) {
- if (!resizeattr2(attr, strlen(rq->origusername))) {
+ if (!resizeattr(attr, strlen(rq->origusername))) {
debug(DBG_WARN, "replyh: malloc failed, ignoring reply");
goto errunlock;
}
@@ -2023,25 +1960,13 @@ int replyh(struct server *server, unsigned char *buf) {
goto errunlock;
}
- free(buf);
- buf = radmsg2buf(msg);
+ buf = radmsg2buf(msg, (uint8_t *)from->conf->secret);
radmsg_free(msg);
msg = NULL;
if (!buf) {
debug(DBG_ERR, "replyh: malloc failed");
goto errunlock;
}
-
- if (messageauth) {
- rqattr = attrget(buf + 20, RADLEN(buf) - 20, RAD_Attr_Message_Authenticator);
- if (rqattr) {
- if (!createmessageauth(buf, ATTRVAL(rqattr), from->conf->secret)) {
- debug(DBG_WARN, "replyh: failed to create authenticator, malloc failed?, ignoring reply");
- goto errunlock;
- }
- debug(DBG_DBG, "replyh: computed messageauthattr");
- }
- }
fromsa = rq->fromsa; /* only needed for UDP */
/* once we set received = 1, rq may be reused */
@@ -2050,12 +1975,33 @@ int replyh(struct server *server, unsigned char *buf) {
debug(DBG_INFO, "replyh: passing reply to client %s", from->conf->name);
sendreply(from, buf, &fromsa, rq->fromudpsock);
pthread_mutex_unlock(&server->newrq_mutex);
- return 1;
+ return;
errunlock:
radmsg_free(msg);
pthread_mutex_unlock(&server->newrq_mutex);
- return 0;
+ return;
+}
+
+struct radmsg *createstatsrvmsg() {
+ struct radmsg *msg;
+ struct tlv *attr;
+
+ msg = radmsg_init(RAD_Status_Server, 0, NULL);
+ if (!msg)
+ return NULL;
+
+ attr = maketlv(RAD_Attr_Message_Authenticator, 16, NULL);
+ if (!attr) {
+ radmsg_free(msg);
+ return NULL;
+ }
+ if (!radmsg_add(msg, attr)) {
+ freetlv(attr);
+ radmsg_free(msg);
+ return NULL;
+ }
+ return msg;
}
/* code for removing state not finished */
@@ -2068,7 +2014,6 @@ void *clientwr(void *arg) {
struct timeval now, laststatsrv;
struct timespec timeout;
struct request statsrvrq;
- unsigned char statsrvbuf[38];
struct clsrvconf *conf;
conf = server->conf;
@@ -2086,12 +2031,6 @@ void *clientwr(void *arg) {
memset(&timeout, 0, sizeof(struct timespec));
if (conf->statusserver) {
- memset(&statsrvrq, 0, sizeof(struct request));
- memset(statsrvbuf, 0, sizeof(statsrvbuf));
- statsrvbuf[0] = RAD_Status_Server;
- statsrvbuf[3] = 38;
- statsrvbuf[20] = RAD_Attr_Message_Authenticator;
- statsrvbuf[21] = 18;
gettimeofday(&server->lastrcv, NULL);
gettimeofday(&laststatsrv, NULL);
}
@@ -2205,18 +2144,12 @@ void *clientwr(void *arg) {
gettimeofday(&now, NULL);
if (now.tv_sec - secs > STATUS_SERVER_PERIOD) {
laststatsrv = now;
- if (!RAND_bytes(statsrvbuf + 4, 16)) {
- debug(DBG_WARN, "clientwr: failed to generate random auth");
- continue;
- }
- statsrvrq.buf = malloc(sizeof(statsrvbuf));
- if (!statsrvrq.buf) {
- debug(DBG_ERR, "clientwr: malloc failed");
- continue;
+ memset(&statsrvrq, 0, sizeof(struct request));
+ statsrvrq.msg = createstatsrvmsg();
+ if (statsrvrq.msg) {
+ debug(DBG_DBG, "clientwr: sending status server to %s", conf->host);
+ sendrq(server, &statsrvrq);
}
- memcpy(statsrvrq.buf, statsrvbuf, sizeof(statsrvbuf));
- debug(DBG_DBG, "clientwr: sending status server to %s", conf->host);
- sendrq(server, &statsrvrq);
}
}
}
generated by cgit v1.1 at 2024-12-27 13:05:59 +0000