kauth: fix clock skew detection

[openafs.git] / src / kauth / kaprocs.c

diff --git a/src/kauth/kaprocs.c b/src/kauth/kaprocs.c
index 9e9f02c..315096a 100644 (file)
--- a/src/kauth/kaprocs.c
+++ b/src/kauth/kaprocs.c
@@ -371,13 +371,13 @@ check_auth(struct rx_call *call,
        noAuthenticationRequired = afsconf_GetNoAuthFlag(KA_conf);
 
     si = rx_SecurityClassOf(rx_ConnectionOf(call));
-    if (si == RX_SCINDEX_VAB) {
+    if (si == RX_SECIDX_VAB) {
        printf("No support for VAB security module yet.\n");
        return -1;
-    } else if (si == RX_SCINDEX_NULL) {
+    } else if (si == RX_SECIDX_NULL) {
        code = KANOAUTH;
        goto no_auth;
-    } else if (si != RX_SCINDEX_KAD) {
+    } else if (si != RX_SECIDX_KAD) {
        es_Report("Unknown security index %d\n", si);
        return -1;
     }
@@ -711,7 +711,9 @@ ChangePassWord(struct rx_call *call, char *aname, char *ainstance,
     /* validate the request */
     request_time = ntohl(request.time);        /* reorder date */
     kvno = ntohl(request.kvno);
-    if ((abs(request_time - time(0)) > KTC_TIME_UNCERTAINTY) || strncmp(request.label, KA_CPW_REQ_LABEL, sizeof(request.label)) || (request.spare) || (kvno > MAXKAKVNO)) {    /* these are reseved */
+    if (check_ka_skew(request_time, time(NULL), KTC_TIME_UNCERTAINTY) ||
+       strncmp(request.label, KA_CPW_REQ_LABEL, sizeof(request.label)) ||
+       request.spare || kvno > MAXKAKVNO) {    /* these are reserved */
        code = KABADREQUEST;
        goto abort;
     }
@@ -1141,7 +1143,7 @@ Authenticate(int version, struct rx_call *call, char *aname, char *ainstance,
     }
 #endif /* EXPIREPW */
 
-    if (abs(request.time - now) > KTC_TIME_UNCERTAINTY) {
+    if (check_ka_skew(request.time, now, KTC_TIME_UNCERTAINTY)) {
 #if 0
        if (oanswer->MaxSeqLen < sizeof(afs_int32))
            code = KAANSWERTOOLONG;
@@ -1638,7 +1640,11 @@ kamGetEntry(struct rx_call *call,
        memcpy(&aentry->key, &tentry.key, sizeof(struct ktc_encryptionKey));
     else
        memset(&aentry->key, 0, sizeof(aentry->key));
+
     code = ka_KeyCheckSum((char *)&tentry.key, &aentry->keyCheckSum);
+    if (code)
+       goto abort;
+
     if (!tentry.pwsums[0] && npwSums > 1 && !tentry.pwsums[1]) {
        aentry->reserved3 = 0x12340000;
     } else {