X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=src%2Fsessions.c;h=c31a51ac95a11c507fffa248920936989cb3a634;hb=5571d79a78a1360f2a56b22c6bf59640cf2c88e8;hp=f90857c47252593ed391462580fc003d33fb8bc9;hpb=8cabd1e6ac6c300f7e603cd61f1a8a7a7da7fb8f;p=mod_auth_gssapi.git

diff --git a/src/sessions.c b/src/sessions.c
index f90857c..c31a51a 100644
--- a/src/sessions.c
+++ b/src/sessions.c
@@ -86,9 +86,9 @@ static GSSSessionData_t *decode_GSSSessionData(void *buf, size_t len)
 
 #define MAG_BEARER_KEY "MagBearerToken"
 
-void mag_check_session(request_rec *req,
-                       struct mag_config *cfg, struct mag_conn **conn)
+void mag_check_session(struct mag_req_cfg *cfg, struct mag_conn **conn)
 {
+    request_rec *req = cfg->req;
     struct mag_conn *mc;
     apr_status_t rc;
     session_rec *sess = NULL;
@@ -108,11 +108,8 @@ void mag_check_session(request_rec *req,
 
     mc = *conn;
     if (!mc) {
-        mc = apr_pcalloc(req->pool, sizeof(struct mag_conn));
-        if (!mc) return;
-
-        mc->parent = req->pool;
-        *conn = mc;
+        *conn = mc = mag_new_conn_ctx(req->pool);
+        mc->is_preserved = true;
     }
 
     rc = mag_session_get(req, sess, MAG_BEARER_KEY, &sessval);
@@ -161,21 +158,27 @@ void mag_check_session(request_rec *req,
     expiration = gsessdata->expiration;
     if (expiration < time(NULL)) {
         /* credentials fully expired, return nothing */
+        mc->established = false;
         goto done;
     }
 
     /* user name */
-    mc->user_name = apr_pstrndup(mc->parent,
+    mc->user_name = apr_pstrndup(mc->pool,
                                  (char *)gsessdata->username.buf,
                                  gsessdata->username.size);
     if (!mc->user_name) goto done;
 
     /* gssapi name */
-    mc->gss_name = apr_pstrndup(mc->parent,
+    mc->gss_name = apr_pstrndup(mc->pool,
                                 (char *)gsessdata->gssname.buf,
                                 gsessdata->gssname.size);
     if (!mc->gss_name) goto done;
 
+    mc->basic_hash.length = gsessdata->basichash.size;
+    mc->basic_hash.value = apr_palloc(mc->pool, mc->basic_hash.length);
+    memcpy(mc->basic_hash.value,
+           gsessdata->basichash.buf, gsessdata->basichash.size);
+
     /* OK we have a valid token */
     mc->established = true;
 
@@ -183,9 +186,9 @@ done:
     ASN_STRUCT_FREE(asn_DEF_GSSSessionData, gsessdata);
 }
 
-void mag_attempt_session(request_rec *req,
-                         struct mag_config *cfg, struct mag_conn *mc)
+void mag_attempt_session(struct mag_req_cfg *cfg, struct mag_conn *mc)
 {
+    request_rec *req = cfg->req;
     session_rec *sess = NULL;
     struct databuf plainbuf = { 0 };
     struct databuf cipherbuf = { 0 };
@@ -206,13 +209,8 @@ void mag_attempt_session(request_rec *req,
 
     if (!cfg->mag_skey) {
         ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, req,
-                      "Session key not available, generating new one.");
-        rc = SEAL_KEY_CREATE(cfg->pool, &cfg->mag_skey, NULL);
-        if (rc != OK) {
-            ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
-                          "Failed to create sealing key!");
-            return;
-        }
+                      "Session key not available, aborting.");
+        return;
     }
 
     gsessdata.established = mc->established?1:0;
@@ -222,6 +220,10 @@ void mag_attempt_session(request_rec *req,
         goto done;
     if (OCTET_STRING_fromString(&gsessdata.gssname, mc->gss_name) != 0)
         goto done;
+    if (OCTET_STRING_fromBuf(&gsessdata.basichash,
+                             (const char *)mc->basic_hash.value,
+                             mc->basic_hash.length) != 0)
+        goto done;
     ret = encode_GSSSessionData(req->pool, &gsessdata,
                                 &plainbuf.value, &plainbuf.length);
     if (ret == false) {
@@ -255,3 +257,70 @@ done:
     ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_GSSSessionData, &gsessdata);
 }
 
+static int mag_basic_hmac(struct seal_key *key, unsigned char *mac,
+                          gss_buffer_desc user, gss_buffer_desc pwd)
+{
+    struct databuf hmacbuf = { mac, 0 };
+    int data_size = user.length + pwd.length + 1;
+    unsigned char data[data_size];
+    struct databuf databuf = { data, data_size };
+
+    memcpy(data, user.value, user.length);
+    data[user.length] = '\0';
+    memcpy(&data[user.length + 1], pwd.value, pwd.length);
+
+    return HMAC_BUFFER(key, &databuf, &hmacbuf);
+}
+
+static int mag_get_mac_size(struct mag_req_cfg *cfg)
+{
+    if (!cfg->mag_skey) {
+        ap_log_perror(APLOG_MARK, APLOG_INFO, 0, cfg->cfg->pool,
+                      "Session key not available, aborting!");
+        return 0;
+    }
+
+    return get_mac_size(cfg->mag_skey);
+}
+
+bool mag_basic_check(struct mag_req_cfg *cfg, struct mag_conn *mc,
+                     gss_buffer_desc user, gss_buffer_desc pwd)
+{
+    int mac_size = mag_get_mac_size(cfg);
+    unsigned char mac[mac_size];
+    int ret, i, j;
+    bool res = false;
+
+    if (mac_size == 0) return false;
+    if (mc->basic_hash.value == NULL) return false;
+
+    ret = mag_basic_hmac(cfg->mag_skey, mac, user, pwd);
+    if (ret != 0) goto done;
+
+    for (i = 0, j = 0; i < mac_size; i++) {
+        if (mc->basic_hash.value[i] != mac[i]) j++;
+    }
+    if (j == 0) res = true;
+
+done:
+    if (res == false) {
+        mc->basic_hash.value = NULL;
+        mc->basic_hash.length = 0;
+    }
+    return res;
+}
+
+void mag_basic_cache(struct mag_req_cfg *cfg, struct mag_conn *mc,
+                     gss_buffer_desc user, gss_buffer_desc pwd)
+{
+    int mac_size = mag_get_mac_size(cfg);
+    unsigned char mac[mac_size];
+    int ret;
+
+    ret = mag_basic_hmac(cfg->mag_skey, mac, user, pwd);
+    if (ret != 0) return;
+
+    mc->basic_hash.length = mac_size;
+    mc->basic_hash.value = apr_palloc(mc->pool, mac_size);
+    memcpy(mc->basic_hash.value, mac, mac_size);
+}