From cfebdd6b1aaee3cbbe2372de6707600cb9f4892e Mon Sep 17 00:00:00 2001
From: Thomas Berezansky <tsbere@mvlc.org>
Date: Thu, 1 Sep 2011 16:41:33 -0400
Subject: [PATCH] Make more auth values configurable

Amount of time seed is valid
Amount of time to keep failure count in memcache since last auth event
Number of failures before locking out auth attempts

Also, remove seed from memcache once it has been used once.

Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>
Signed-off-by: Bill Erickson <berick@esilibrary.com>
---
 Open-ILS/examples/opensrf.xml.example |  5 ++++
 Open-ILS/src/c-apps/oils_auth.c       | 55 ++++++++++++++++++++++++++++++-----
 2 files changed, 52 insertions(+), 8 deletions(-)

diff --git a/Open-ILS/examples/opensrf.xml.example b/Open-ILS/examples/opensrf.xml.example
index 0b16511464..f0107797ff 100644
--- a/Open-ILS/examples/opensrf.xml.example
+++ b/Open-ILS/examples/opensrf.xml.example
@@ -430,6 +430,11 @@ vim:et:ts=4:sw=4:
                         <temp>300</temp>
                         <persist>2 weeks</persist>
                     </default_timeout>
+                    <auth_limits>
+                        <seed>30</seed> <!-- amount of time a seed request is valid for -->
+                        <block_time>90</block_time> <!-- amount of time since last auth or seed request to save failure counts -->
+                        <block_count>10</block_count> <!-- number of failures before blocking access -->
+                    </auth_limits>
                 </app_settings>
             </open-ils.auth>
 
diff --git a/Open-ILS/src/c-apps/oils_auth.c b/Open-ILS/src/c-apps/oils_auth.c
index e1efccb2d2..8d143f0e99 100644
--- a/Open-ILS/src/c-apps/oils_auth.c
+++ b/Open-ILS/src/c-apps/oils_auth.c
@@ -20,9 +20,6 @@
 // Default time for extending a persistent session: ten minutes
 #define DEFAULT_RESET_INTERVAL 10 * 60
 
-#define OILS_AUTH_COUNT_MAX 10
-#define OILS_AUTH_COUNT_INTERVAL 90
-
 int osrfAppInitialize();
 int osrfAppChildInit();
 
@@ -30,6 +27,9 @@ static long _oilsAuthOPACTimeout = 0;
 static long _oilsAuthStaffTimeout = 0;
 static long _oilsAuthOverrideTimeout = 0;
 static long _oilsAuthPersistTimeout = 0;
+static long _oilsAuthSeedTimeout = 0;
+static long _oilsAuthBlockTimeout = 0;
+static long _oilsAuthBlockCount = 0;
 
 
 /**
@@ -120,6 +120,42 @@ int osrfAppChildInit() {
 int oilsAuthInit( osrfMethodContext* ctx ) {
 	OSRF_METHOD_VERIFY_CONTEXT(ctx);
 
+	if(!_oilsAuthSeedTimeout) { /* Load the default timeouts */
+
+		jsonObject* value_obj;
+
+		value_obj = osrf_settings_host_value_object(
+			"/apps/open-ils.auth/app_settings/auth_limits/seed" );
+		_oilsAuthSeedTimeout = oilsUtilsIntervalToSeconds( jsonObjectGetString( value_obj ));
+		jsonObjectFree(value_obj);
+		if( -1 == _oilsAuthSeedTimeout ) {
+			osrfLogWarning( OSRF_LOG_MARK, "Invalid timeout for Auth Seeds - Using 30 seconds" );
+			_oilsAuthSeedTimeout = 30;
+		}
+
+		value_obj = osrf_settings_host_value_object(
+			"/apps/open-ils.auth/app_settings/auth_limits/block_time" );
+		_oilsAuthBlockTimeout = oilsUtilsIntervalToSeconds( jsonObjectGetString( value_obj ));
+		jsonObjectFree(value_obj);
+		if( -1 == _oilsAuthBlockTimeout ) {
+			osrfLogWarning( OSRF_LOG_MARK, "Invalid timeout for Blocking Timeout - Using 3x Seed" );
+			_oilsAuthBlockTimeout = _oilsAuthSeedTimeout * 3;
+		}
+
+		value_obj = osrf_settings_host_value_object(
+			"/apps/open-ils.auth/app_settings/auth_limits/block_count" );
+		_oilsAuthBlockCount = oilsUtilsIntervalToSeconds( jsonObjectGetString( value_obj ));
+		jsonObjectFree(value_obj);
+		if( -1 == _oilsAuthBlockCount ) {
+			osrfLogWarning( OSRF_LOG_MARK, "Invalid count for Blocking - Using 10" );
+			_oilsAuthBlockCount = 10;
+		}
+
+		osrfLogInfo(OSRF_LOG_MARK, "Set auth limits: "
+			"seed => %ld : block_timeout => %ld : block_count => %ld",
+			_oilsAuthSeedTimeout, _oilsAuthBlockTimeout, _oilsAuthBlockCount );
+	}
+
 	char* username  = jsonObjectToSimpleString( jsonObjectGetIndex(ctx->params, 0) );
 	if( username ) {
 
@@ -141,8 +177,8 @@ int oilsAuthInit( osrfMethodContext* ctx ) {
 			if(!countobject) {
 				countobject = jsonNewNumberObject( (double) 0 );
 			}
-			osrfCachePutString( key, seed, 30 );
-			osrfCachePutObject( countkey, countobject, OILS_AUTH_COUNT_INTERVAL );
+			osrfCachePutString( key, seed, _oilsAuthSeedTimeout );
+			osrfCachePutObject( countkey, countobject, _oilsAuthBlockTimeout );
 
 			osrfLogDebug( OSRF_LOG_MARK, "oilsAuthInit(): has seed %s and key %s", seed, key );
 
@@ -239,6 +275,9 @@ static int oilsAuthVerifyPassword( const osrfMethodContext* ctx,
 			ctx->request, "No authentication seed found. "
 			"open-ils.auth.authenticate.init must be called first");
 	}
+    
+	// We won't be needing the seed again, remove it
+	osrfCacheRemove( "%s%s", OILS_AUTH_CACHE_PRFX, uname );
 
 	// Get the hashed password from the user object
 	char* realPassword = oilsFMGetString( userObj, "passwd" );
@@ -271,15 +310,15 @@ static int oilsAuthVerifyPassword( const osrfMethodContext* ctx,
 	jsonObject* countobject = osrfCacheGetObject( countkey );
 	if(countobject) {
 		double failcount = jsonObjectGetNumber( countobject );
-		if(failcount >= OILS_AUTH_COUNT_MAX) {
+		if(failcount >= _oilsAuthBlockCount) {
 			ret = 0;
-            osrfLogInternal(OSRF_LOG_MARK, "oilsAuth found too many recent failures: %d, forcing failure state.", failcount);
+		    osrfLogInternal(OSRF_LOG_MARK, "oilsAuth found too many recent failures: %d, forcing failure state.", failcount);
 		}
 		if(ret == 0) {
 			failcount += 1;
 		}
 		jsonObjectSetNumber( countobject, failcount );
-		osrfCachePutObject( countkey, countobject, OILS_AUTH_COUNT_INTERVAL );
+		osrfCachePutObject( countkey, countobject, _oilsAuthBlockTimeout );
 		jsonObjectFree(countobject);
 	}
 	free(countkey);
-- 
2.11.0