--- linux/net/ipsec/alg/ipsec_alg_cryptoapi.c.dist	2006-07-29 02:09:38.000000000 -0300
+++ linux/net/ipsec/alg/ipsec_alg_cryptoapi.c	2006-09-18 17:10:28.000000000 -0300
@@ -84,6 +84,7 @@
 #define CIPHERNAME_CAST		"cast5"
 #define CIPHERNAME_SERPENT	"serpent"
 #define CIPHERNAME_TWOFISH	"twofish"
+#define CIPHERNAME_NULL		"cipher_null"
 
 #define ESP_3DES		3
 #define ESP_AES			12
@@ -109,6 +110,7 @@
 static int cast[] = {-1, -1};
 static int serpent[] = {-1, -1};
 static int twofish[] = {-1, -1};
+static int null[] = {-1, -1};
 
 #ifdef module_param
 module_param(debug,int,0600);
@@ -124,6 +126,7 @@
 module_param(cast,int,NULL,0);
 module_param(serpent,int,NULL,0);
 module_param(twofish,int,NULL,0);
+module_param(null,int,NULL,0);
 #else
 MODULE_PARM(debug, "i");
 MODULE_PARM(test, "i");
@@ -137,6 +140,7 @@
 MODULE_PARM(cast,"1-2i");
 MODULE_PARM(serpent,"1-2i");
 MODULE_PARM(twofish,"1-2i");
+MODULE_PARM(null,"1-2i");
 #endif
 
 MODULE_PARM_DESC(noauto, "Dont try all known algos, just setup enabled ones");
@@ -147,6 +151,7 @@
 MODULE_PARM_DESC(cast, "0: disable | 1: force_enable | min,max: keybitlens");
 MODULE_PARM_DESC(serpent, "0: disable | 1: force_enable | min,max: keybitlens");
 MODULE_PARM_DESC(twofish, "0: disable | 1: force_enable | min,max: keybitlens");
+MODULE_PARM_DESC(null, "0: disable | 1: force_enable| min,max: dontuse");
 
 struct ipsec_alg_capi_cipher {
 	const char *ciphername;	/* cryptoapi's ciphername */
@@ -163,6 +168,7 @@
 	{ CIPHERNAME_CAST ,     8, 128, 128, cast   , { ixt_alg_id: ESP_CAST, }},
 	{ CIPHERNAME_BLOWFISH , 8,  96, 448, blowfish,{ ixt_alg_id: ESP_BLOWFISH, }},
 	{ CIPHERNAME_3DES ,     8, 192, 192, des_ede3,{ ixt_alg_id: ESP_3DES, }},
+	{ CIPHERNAME_NULL ,     1, 0, 0, null,{ ixt_alg_id: ESP_NULL, }},
 	{ NULL, 0, 0, 0, NULL, {} }
 };
 #ifdef NOT_YET