pam/pam-0.99.6.2-namespace-dirnames.patch

--- Linux-PAM-0.99.6.2/modules/pam_namespace/pam_namespace.h.dirnames	2007-02-26 23:31:26.000000000 +0100
+++ Linux-PAM-0.99.6.2/modules/pam_namespace/pam_namespace.h	2007-02-27 00:40:04.000000000 +0100
@@ -89,6 +89,8 @@
 #define PAMNS_IGN_INST_PARENT_MODE  0x00008000 /* Ignore instance parent mode */
 #define PAMNS_NO_UNMOUNT_ON_CLOSE  0x00010000 /* no unmount at session close */
 
+#define NAMESPACE_MAX_DIR_LEN 80
+
 /*
  * Polyinstantiation method options, based on user, security context
  * or both
--- Linux-PAM-0.99.6.2/modules/pam_namespace/pam_namespace.c.dirnames	2007-02-26 23:31:26.000000000 +0100
+++ Linux-PAM-0.99.6.2/modules/pam_namespace/pam_namespace.c	2007-02-27 00:39:51.000000000 +0100
@@ -436,6 +436,36 @@
     return 0;
 }
 
+/*
+ * md5hash generates a hash of the passed in instance directory name.
+ */
+static char *md5hash(const char *instname, struct instance_data *idata)
+{
+    int i;
+    char *md5inst = NULL;
+    char *to;
+    unsigned char inst_digest[MD5_DIGEST_LENGTH];
+
+    /*
+     * Create MD5 hashes for instance pathname.
+     */
+
+    MD5((const unsigned char *)instname, strlen(instname), inst_digest);
+
+    if ((md5inst = malloc(MD5_DIGEST_LENGTH * 2 + 1)) == NULL) {
+        pam_syslog(idata->pamh, LOG_ERR, "Unable to allocate buffer");
+        return NULL;
+    }
+
+    to = md5inst;
+    for (i = 0; i < MD5_DIGEST_LENGTH; i++) {
+        snprintf(to, 3, "%02x", (unsigned int)inst_digest[i]);
+        to += 2;
+    }
+
+    return md5inst;
+}
+
 #ifdef WITH_SELINUX
 static int form_context(const struct polydir_s *polyptr,
 		security_context_t *i_context, security_context_t *origcon,
@@ -547,12 +577,21 @@
 #endif
 {
     int rc;
+    char *hash = NULL;
+#ifdef WITH_SELINUX
+    security_context_t rawcon = NULL;
+#endif
 
-# ifdef WITH_SELINUX
-    rc = form_context(polyptr, i_context, origcon, idata);
+    *i_name = NULL;
+#ifdef WITH_SELINUX
+    *i_context = NULL;
+    *origcon = NULL;
+    if ((rc=form_context(polyptr, i_context, origcon, idata)) != PAM_SUCCESS) {
+	return rc;
+    }
 #endif
-    rc = PAM_SUCCESS;
 
+    rc = PAM_SESSION_ERR;
     /*
      * Set the name of the polyinstantiated instance dir based on the
      * polyinstantiation method.
@@ -561,16 +600,20 @@
         case USER:
 	    if (asprintf(i_name, "%s", idata->user) < 0) {
 		*i_name = NULL;
-		rc = PAM_SESSION_ERR;
-	    }
+		goto fail;
+	    }	    
     	    break;
 
 #ifdef WITH_SELINUX
     	case LEVEL:
         case CONTEXT:
-	    if (asprintf(i_name, "%s_%s", *i_context, idata->user) < 0) {
+	    if (selinux_trans_to_raw_context(*i_context, &rawcon) < 0) {
+		pam_syslog(idata->pamh, LOG_ERR, "Error translating directory context");
+		goto fail;
+	    }    	     
+	    if (asprintf(i_name, "%s_%s", rawcon, idata->user) < 0) {
 		*i_name = NULL;
-		rc = PAM_SESSION_ERR;
+		goto fail;
 	    }
     	    break;
 
@@ -579,12 +622,48 @@
     	default:
     	    if (idata->flags & PAMNS_DEBUG)
     	        pam_syslog(idata->pamh, LOG_ERR, "Unknown method");
-    	    rc = PAM_SESSION_ERR;
+    	    goto fail;
     }
 
-    if ((idata->flags & PAMNS_DEBUG) && rc == PAM_SUCCESS)
+    if (idata->flags & PAMNS_DEBUG)
         pam_syslog(idata->pamh, LOG_DEBUG, "poly_name %s", *i_name);
 
+    if ((idata->flags & PAMNS_GEN_HASH) || strlen(*i_name) > NAMESPACE_MAX_DIR_LEN) {
+        hash = md5hash(*i_name, idata);
+        if (hash == NULL) {
+    	    goto fail;
+        }
+        if (idata->flags & PAMNS_GEN_HASH) {
+    	    free(*i_name);
+	    *i_name = hash;
+	    hash = NULL;
+        } else {
+    	    char *newname;
+    	    if (asprintf(&newname, "%.*s_%s", NAMESPACE_MAX_DIR_LEN-1-strlen(hash),
+    		*i_name, hash) < 0) {
+    		goto fail;
+    	    }
+    	    free(*i_name);
+    	    *i_name = newname;
+        }
+    }
+    rc = PAM_SUCCESS;
+    
+fail:
+    free(hash);
+#ifdef WITH_SELINUX
+    freecon(rawcon);
+#endif
+    if (rc != PAM_SUCCESS) {
+#ifdef WITH_SELINUX
+	freecon(*i_context);
+	*i_context = NULL;
+	freecon(*origcon);
+	*origcon = NULL;
+#endif
+	free(*i_name);
+	*i_name = NULL;
+    }
     return rc;
 }
 
@@ -832,39 +911,6 @@
 
 
 /*
- * md5hash generates a hash of the passed in instance directory name.
- */
-static int md5hash(char **instname, struct instance_data *idata)
-{
-    int i;
-    char *md5inst = NULL;
-    char *to;
-    unsigned char inst_digest[MD5_DIGEST_LENGTH];
-
-    /*
-     * Create MD5 hashes for instance pathname.
-     */
-
-    MD5((unsigned char *)*instname, strlen(*instname), inst_digest);
-
-    if ((md5inst = malloc(MD5_DIGEST_LENGTH * 2 + 1)) == NULL) {
-        pam_syslog(idata->pamh, LOG_ERR, "Unable to allocate buffer");
-        return PAM_SESSION_ERR;
-    }
-
-    to = md5inst;
-    for (i = 0; i < MD5_DIGEST_LENGTH; i++) {
-        snprintf(to, 3, "%02x", (unsigned int)inst_digest[i]);
-        to += 3;
-    }
-
-    free(*instname);
-    *instname = md5inst;
-
-    return PAM_SUCCESS;
-}
-
-/*
  * This function performs the namespace setup for a particular directory
  * that is being polyinstantiated. It creates an MD5 hash of instance 
  * directory, calls create_dirs to create it with appropriate
@@ -914,14 +960,6 @@
 #endif
     }
 
-    if (idata->flags & PAMNS_GEN_HASH) {
-        retval = md5hash(&instname, idata);
-        if (retval < 0) {
-            pam_syslog(idata->pamh, LOG_ERR, "Error generating md5 hash");
-            goto error_out;
-        }
-    }
-
     if (asprintf(&inst_dir, "%s%s", polyptr->instance_prefix, instname) < 0)
 	goto error_out;