2 files changed, 5 insertions, 47 deletions

diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index ab7a9124f985..f925f206d8ff 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -6,8 +6,6 @@
 config IPV6
         tristate "The IPv6 protocol"
         default m
-        select CRYPTO if IPV6_PRIVACY
-        select CRYPTO_MD5 if IPV6_PRIVACY
         ---help---
           This is complemental support for the IP version 6.
           You will still be able to do traditional IPv4 networking as well.
@@ -22,7 +20,7 @@ config IPV6
           module will be called ipv6.
 
 config IPV6_PRIVACY
-        bool "IPv6: Privacy Extensions (RFC 3041) support"
+        bool "IPv6: Privacy Extensions support"
         depends on IPV6
         ---help---
           Privacy Extensions for Stateless Address Autoconfiguration in IPv6
@@ -30,6 +28,9 @@ config IPV6_PRIVACY
           pseudo-random global-scope unicast address(es) will assigned to
           your interface(s).
         
+          We use our standard pseudo random algorithm to generate randomized
+          interface identifier, instead of one described in RFC 3041.
+
           By default, kernel do not generate temporary addresses.
           To use temporary addresses, do
         
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 441eeacfc851..c92f3d6a8f13 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -78,8 +78,6 @@
 
 #ifdef CONFIG_IPV6_PRIVACY
 #include <linux/random.h>
-#include <linux/crypto.h>
-#include <linux/scatterlist.h>
 #endif
 
 #include <asm/uaccess.h>
@@ -110,8 +108,6 @@ static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpad
 static void ipv6_regen_rndid(unsigned long data);
 
 static int desync_factor = MAX_DESYNC_FACTOR * HZ;
-static struct crypto_tfm *md5_tfm;
-static DEFINE_SPINLOCK(md5_tfm_lock);
 #endif
 
 static int ipv6_count_addresses(struct inet6_dev *idev);
@@ -371,8 +367,6 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
                 in6_dev_hold(ndev);
 
 #ifdef CONFIG_IPV6_PRIVACY
-                get_random_bytes(ndev->rndid, sizeof(ndev->rndid));
-                get_random_bytes(ndev->entropy, sizeof(ndev->entropy));
                 init_timer(&ndev->regen_timer);
                 ndev->regen_timer.function = ipv6_regen_rndid;
                 ndev->regen_timer.data = (unsigned long) ndev;
@@ -1376,34 +1370,9 @@ static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
 static int __ipv6_regen_rndid(struct inet6_dev *idev)
 {
-        struct net_device *dev;
-        struct scatterlist sg[2];
-
-        sg_set_buf(&sg[0], idev->entropy, 8);
-        sg_set_buf(&sg[1], idev->work_eui64, 8);
-
-        dev = idev->dev;
-
-        if (ipv6_generate_eui64(idev->work_eui64, dev)) {
-                printk(KERN_INFO
-                        "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
-                        idev);
-                get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
-        }
 regen:
-        spin_lock(&md5_tfm_lock);
-        if (unlikely(md5_tfm == NULL)) {
-                spin_unlock(&md5_tfm_lock);
-                return -1;
-        }
-        crypto_digest_init(md5_tfm);
-        crypto_digest_update(md5_tfm, sg, 2);
-        crypto_digest_final(md5_tfm, idev->work_digest);
-        spin_unlock(&md5_tfm_lock);
-
-        memcpy(idev->rndid, &idev->work_digest[0], 8);
+        get_random_bytes(idev->rndid, sizeof(idev->rndid));
         idev->rndid[0] &= ~0x02;
-        memcpy(idev->entropy, &idev->work_digest[8], 8);
 
         /*
          * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
@@ -3759,13 +3728,6 @@ int __init addrconf_init(void)
 
         register_netdevice_notifier(&ipv6_dev_notf);
 
-#ifdef CONFIG_IPV6_PRIVACY
-        md5_tfm = crypto_alloc_tfm("md5", 0);
-        if (unlikely(md5_tfm == NULL))
-                printk(KERN_WARNING
-                        "failed to load transform for md5\n");
-#endif
-
         addrconf_verify(0);
         rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
 #ifdef CONFIG_SYSCTL
@@ -3828,11 +3790,6 @@ void __exit addrconf_cleanup(void)
 
         rtnl_unlock();
 
-#ifdef CONFIG_IPV6_PRIVACY
-        crypto_free_tfm(md5_tfm);
-        md5_tfm = NULL;
-#endif
-
 #ifdef CONFIG_PROC_FS
         proc_net_remove("if_inet6");
 #endif