1 files changed, 63 insertions, 44 deletions

diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index a15a6f320f70..e78680a9985b 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -24,7 +24,7 @@
  *      This file is derived from net/ipv4/esp.c
  */
 
-#include <linux/config.h>
+#include <linux/err.h>
 #include <linux/module.h>
 #include <net/ip.h>
 #include <net/xfrm.h>
@@ -45,7 +45,8 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
         int hdr_len;
         struct ipv6hdr *top_iph;
         struct ipv6_esp_hdr *esph;
-        struct crypto_tfm *tfm;
+        struct crypto_blkcipher *tfm;
+        struct blkcipher_desc desc;
         struct esp_data *esp;
         struct sk_buff *trailer;
         int blksize;
@@ -68,7 +69,9 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
 
         alen = esp->auth.icv_trunc_len;
         tfm = esp->conf.tfm;
-        blksize = ALIGN(crypto_tfm_alg_blocksize(tfm), 4);
+        desc.tfm = tfm;
+        desc.flags = 0;
+        blksize = ALIGN(crypto_blkcipher_blocksize(tfm), 4);
         clen = ALIGN(clen + 2, blksize);
         if (esp->conf.padlen)
                 clen = ALIGN(clen, esp->conf.padlen);
@@ -96,8 +99,13 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
         esph->seq_no = htonl(++x->replay.oseq);
         xfrm_aevent_doreplay(x);
 
-        if (esp->conf.ivlen)
-                crypto_cipher_set_iv(tfm, esp->conf.ivec, crypto_tfm_alg_ivsize(tfm));
+        if (esp->conf.ivlen) {
+                if (unlikely(!esp->conf.ivinitted)) {
+                        get_random_bytes(esp->conf.ivec, esp->conf.ivlen);
+                        esp->conf.ivinitted = 1;
+                }
+                crypto_blkcipher_set_iv(tfm, esp->conf.ivec, esp->conf.ivlen);
+        }
 
         do {
                 struct scatterlist *sg = &esp->sgbuf[0];
@@ -108,24 +116,25 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
                                 goto error;
                 }
                 skb_to_sgvec(skb, sg, esph->enc_data+esp->conf.ivlen-skb->data, clen);
-                crypto_cipher_encrypt(tfm, sg, sg, clen);
+                err = crypto_blkcipher_encrypt(&desc, sg, sg, clen);
                 if (unlikely(sg != &esp->sgbuf[0]))
                         kfree(sg);
         } while (0);
 
+        if (unlikely(err))
+                goto error;
+
         if (esp->conf.ivlen) {
-                memcpy(esph->enc_data, esp->conf.ivec, crypto_tfm_alg_ivsize(tfm));
-                crypto_cipher_get_iv(tfm, esp->conf.ivec, crypto_tfm_alg_ivsize(tfm));
+                memcpy(esph->enc_data, esp->conf.ivec, esp->conf.ivlen);
+                crypto_blkcipher_get_iv(tfm, esp->conf.ivec, esp->conf.ivlen);
         }
 
         if (esp->auth.icv_full_len) {
-                esp->auth.icv(esp, skb, (u8*)esph-skb->data,
-                        sizeof(struct ipv6_esp_hdr) + esp->conf.ivlen+clen, trailer->tail);
-                pskb_put(skb, trailer, alen);
+                err = esp_mac_digest(esp, skb, (u8 *)esph - skb->data,
+                                     sizeof(*esph) + esp->conf.ivlen + clen);
+                memcpy(pskb_put(skb, trailer, alen), esp->auth.work_icv, alen);
         }
 
-        err = 0;
-
 error:
         return err;
 }
@@ -135,8 +144,10 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
         struct ipv6hdr *iph;
         struct ipv6_esp_hdr *esph;
         struct esp_data *esp = x->data;
+        struct crypto_blkcipher *tfm = esp->conf.tfm;
+        struct blkcipher_desc desc = { .tfm = tfm };
         struct sk_buff *trailer;
-        int blksize = ALIGN(crypto_tfm_alg_blocksize(esp->conf.tfm), 4);
+        int blksize = ALIGN(crypto_blkcipher_blocksize(tfm), 4);
         int alen = esp->auth.icv_trunc_len;
         int elen = skb->len - sizeof(struct ipv6_esp_hdr) - esp->conf.ivlen - alen;
 
@@ -156,15 +167,16 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
 
         /* If integrity check is required, do this. */
         if (esp->auth.icv_full_len) {
-                u8 sum[esp->auth.icv_full_len];
-                u8 sum1[alen];
+                u8 sum[alen];
 
-                esp->auth.icv(esp, skb, 0, skb->len-alen, sum);
+                ret = esp_mac_digest(esp, skb, 0, skb->len - alen);
+                if (ret)
+                        goto out;
 
-                if (skb_copy_bits(skb, skb->len-alen, sum1, alen))
+                if (skb_copy_bits(skb, skb->len - alen, sum, alen))
                         BUG();
 
-                if (unlikely(memcmp(sum, sum1, alen))) {
+                if (unlikely(memcmp(esp->auth.work_icv, sum, alen))) {
                         x->stats.integrity_failed++;
                         ret = -EINVAL;
                         goto out;
@@ -183,7 +195,7 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
 
         /* Get ivec. This can be wrong, check against another impls. */
         if (esp->conf.ivlen)
-                crypto_cipher_set_iv(esp->conf.tfm, esph->enc_data, crypto_tfm_alg_ivsize(esp->conf.tfm));
+                crypto_blkcipher_set_iv(tfm, esph->enc_data, esp->conf.ivlen);
 
         {
                 u8 nexthdr[2];
@@ -198,9 +210,11 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
                         }
                 }
                 skb_to_sgvec(skb, sg, sizeof(struct ipv6_esp_hdr) + esp->conf.ivlen, elen);
-                crypto_cipher_decrypt(esp->conf.tfm, sg, sg, elen);
+                ret = crypto_blkcipher_decrypt(&desc, sg, sg, elen);
                 if (unlikely(sg != &esp->sgbuf[0]))
                         kfree(sg);
+                if (unlikely(ret))
+                        goto out;
 
                 if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2))
                         BUG();
@@ -226,9 +240,9 @@ out:
 static u32 esp6_get_max_size(struct xfrm_state *x, int mtu)
 {
         struct esp_data *esp = x->data;
-        u32 blksize = ALIGN(crypto_tfm_alg_blocksize(esp->conf.tfm), 4);
+        u32 blksize = ALIGN(crypto_blkcipher_blocksize(esp->conf.tfm), 4);
 
-        if (x->props.mode) {
+        if (x->props.mode == XFRM_MODE_TUNNEL) {
                 mtu = ALIGN(mtu + 2, blksize);
         } else {
                 /* The worst case. */
@@ -267,11 +281,11 @@ static void esp6_destroy(struct xfrm_state *x)
         if (!esp)
                 return;
 
-        crypto_free_tfm(esp->conf.tfm);
+        crypto_free_blkcipher(esp->conf.tfm);
         esp->conf.tfm = NULL;
         kfree(esp->conf.ivec);
         esp->conf.ivec = NULL;
-        crypto_free_tfm(esp->auth.tfm);
+        crypto_free_hash(esp->auth.tfm);
         esp->auth.tfm = NULL;
         kfree(esp->auth.work_icv);
         esp->auth.work_icv = NULL;
@@ -281,6 +295,7 @@ static void esp6_destroy(struct xfrm_state *x)
 static int esp6_init_state(struct xfrm_state *x)
 {
         struct esp_data *esp = NULL;
+        struct crypto_blkcipher *tfm;
 
         /* null auth and encryption can have zero length keys */
         if (x->aalg) {
@@ -299,24 +314,29 @@ static int esp6_init_state(struct xfrm_state *x)
 
         if (x->aalg) {
                 struct xfrm_algo_desc *aalg_desc;
+                struct crypto_hash *hash;
 
                 esp->auth.key = x->aalg->alg_key;
                 esp->auth.key_len = (x->aalg->alg_key_len+7)/8;
-                esp->auth.tfm = crypto_alloc_tfm(x->aalg->alg_name, 0);
-                if (esp->auth.tfm == NULL)
+                hash = crypto_alloc_hash(x->aalg->alg_name, 0,
+                                         CRYPTO_ALG_ASYNC);
+                if (IS_ERR(hash))
+                        goto error;
+
+                esp->auth.tfm = hash;
+                if (crypto_hash_setkey(hash, esp->auth.key, esp->auth.key_len))
                         goto error;
-                esp->auth.icv = esp_hmac_digest;
  
                 aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
                 BUG_ON(!aalg_desc);
  
                 if (aalg_desc->uinfo.auth.icv_fullbits/8 !=
-                        crypto_tfm_alg_digestsize(esp->auth.tfm)) {
-                                printk(KERN_INFO "ESP: %s digestsize %u != %hu\n",
-                                        x->aalg->alg_name,
-                                        crypto_tfm_alg_digestsize(esp->auth.tfm),
-                                        aalg_desc->uinfo.auth.icv_fullbits/8);
-                                goto error;
+                    crypto_hash_digestsize(hash)) {
+                        NETDEBUG(KERN_INFO "ESP: %s digestsize %u != %hu\n",
+                                 x->aalg->alg_name,
+                                 crypto_hash_digestsize(hash),
+                                 aalg_desc->uinfo.auth.icv_fullbits/8);
+                        goto error;
                 }
  
                 esp->auth.icv_full_len = aalg_desc->uinfo.auth.icv_fullbits/8;
@@ -328,24 +348,22 @@ static int esp6_init_state(struct xfrm_state *x)
         }
         esp->conf.key = x->ealg->alg_key;
         esp->conf.key_len = (x->ealg->alg_key_len+7)/8;
-        if (x->props.ealgo == SADB_EALG_NULL)
-                esp->conf.tfm = crypto_alloc_tfm(x->ealg->alg_name, CRYPTO_TFM_MODE_ECB);
-        else
-                esp->conf.tfm = crypto_alloc_tfm(x->ealg->alg_name, CRYPTO_TFM_MODE_CBC);
-        if (esp->conf.tfm == NULL)
+        tfm = crypto_alloc_blkcipher(x->ealg->alg_name, 0, CRYPTO_ALG_ASYNC);
+        if (IS_ERR(tfm))
                 goto error;
-        esp->conf.ivlen = crypto_tfm_alg_ivsize(esp->conf.tfm);
+        esp->conf.tfm = tfm;
+        esp->conf.ivlen = crypto_blkcipher_ivsize(tfm);
         esp->conf.padlen = 0;
         if (esp->conf.ivlen) {
                 esp->conf.ivec = kmalloc(esp->conf.ivlen, GFP_KERNEL);
                 if (unlikely(esp->conf.ivec == NULL))
                         goto error;
-                get_random_bytes(esp->conf.ivec, esp->conf.ivlen);
+                esp->conf.ivinitted = 0;
         }
-        if (crypto_cipher_setkey(esp->conf.tfm, esp->conf.key, esp->conf.key_len))
+        if (crypto_blkcipher_setkey(tfm, esp->conf.key, esp->conf.key_len))
                 goto error;
         x->props.header_len = sizeof(struct ipv6_esp_hdr) + esp->conf.ivlen;
-        if (x->props.mode)
+        if (x->props.mode == XFRM_MODE_TUNNEL)
                 x->props.header_len += sizeof(struct ipv6hdr);
         x->data = esp;
         return 0;
@@ -366,7 +384,8 @@ static struct xfrm_type esp6_type =
         .destructor     = esp6_destroy,
         .get_max_size   = esp6_get_max_size,
         .input          = esp6_input,
-        .output         = esp6_output
+        .output         = esp6_output,
+        .hdr_offset     = xfrm6_find_1stfragopt,
 };
 
 static struct inet6_protocol esp6_protocol = {