1 files changed, 5 insertions, 48 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 334d21c23da9..0ae0311082fb 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -738,23 +738,17 @@ static int tcp_v6_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
                                    struct in6_addr *daddr,
                                    struct tcphdr *th, unsigned int tcplen)
 {
-        struct scatterlist sg[4];
-        __u16 data_len;
-        int block = 0;
-        __sum16 cksum;
         struct tcp_md5sig_pool *hp;
         struct tcp6_pseudohdr *bp;
-        struct hash_desc *desc;
         int err;
-        unsigned int nbytes = 0;
 
         hp = tcp_get_md5sig_pool();
         if (!hp) {
                 printk(KERN_WARNING "%s(): hash pool not found...\n", __func__);
                 goto clear_hash_noput;
         }
+
         bp = &hp->md5_blk.ip6;
-        desc = &hp->md5_desc;
 
         /* 1. TCP pseudo-header (RFC2460) */
         ipv6_addr_copy(&bp->saddr, saddr);
@@ -762,51 +756,14 @@ static int tcp_v6_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
         bp->len = htonl(tcplen);
         bp->protocol = htonl(IPPROTO_TCP);
 
-        sg_init_table(sg, 4);
-
-        sg_set_buf(&sg[block++], bp, sizeof(*bp));
-        nbytes += sizeof(*bp);
-
-        /* 2. TCP header, excluding options */
-        cksum = th->check;
-        th->check = 0;
-        sg_set_buf(&sg[block++], th, sizeof(*th));
-        nbytes += sizeof(*th);
-
-        /* 3. TCP segment data (if any) */
-        data_len = tcplen - (th->doff << 2);
-        if (data_len > 0) {
-                u8 *data = (u8 *)th + (th->doff << 2);
-                sg_set_buf(&sg[block++], data, data_len);
-                nbytes += data_len;
-        }
-
-        /* 4. shared key */
-        sg_set_buf(&sg[block++], key->key, key->keylen);
-        nbytes += key->keylen;
-
-        sg_mark_end(&sg[block - 1]);
+        err = tcp_calc_md5_hash(md5_hash, key, sizeof(*bp),
+                                th, tcplen, hp);
 
-        /* Now store the hash into the packet */
-        err = crypto_hash_init(desc);
-        if (err) {
-                printk(KERN_WARNING "%s(): hash_init failed\n", __func__);
-                goto clear_hash;
-        }
-        err = crypto_hash_update(desc, sg, nbytes);
-        if (err) {
-                printk(KERN_WARNING "%s(): hash_update failed\n", __func__);
-                goto clear_hash;
-        }
-        err = crypto_hash_final(desc, md5_hash);
-        if (err) {
-                printk(KERN_WARNING "%s(): hash_final failed\n", __func__);
+        if (err)
                 goto clear_hash;
-        }
 
-        /* Reset header, and free up the crypto */
+        /* Free up the crypto pool */
         tcp_put_md5sig_pool();
-        th->check = cksum;
 out:
         return 0;
 clear_hash: