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Diffstat (limited to 'net/ipv4/esp4.c')
-rw-r--r--net/ipv4/esp4.c100
1 files changed, 60 insertions, 40 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index fc2f8ce441de..13b29360d102 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -1,3 +1,4 @@
+#include <linux/err.h>
#include <linux/module.h>
#include <net/ip.h>
#include <net/xfrm.h>
@@ -16,7 +17,8 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
int err;
struct iphdr *top_iph;
struct ip_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;
@@ -36,7 +38,9 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
esp = x->data;
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);
@@ -91,8 +95,13 @@ static int esp_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];
@@ -103,26 +112,27 @@ static int esp_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 ip_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);
}
ip_send_check(top_iph);
- err = 0;
-
error:
return err;
}
@@ -137,8 +147,10 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
struct iphdr *iph;
struct ip_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 ip_esp_hdr) - esp->conf.ivlen - alen;
int nfrags;
@@ -146,6 +158,7 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
u8 nexthdr[2];
struct scatterlist *sg;
int padlen;
+ int err;
if (!pskb_may_pull(skb, sizeof(struct ip_esp_hdr)))
goto out;
@@ -155,15 +168,16 @@ static int esp_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];
-
- esp->auth.icv(esp, skb, 0, skb->len-alen, sum);
+ u8 sum[alen];
+
+ err = esp_mac_digest(esp, skb, 0, skb->len - alen);
+ if (err)
+ 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++;
goto out;
}
@@ -178,7 +192,7 @@ static int esp_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);
sg = &esp->sgbuf[0];
@@ -188,9 +202,11 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
goto out;
}
skb_to_sgvec(skb, sg, sizeof(struct ip_esp_hdr) + esp->conf.ivlen, elen);
- crypto_cipher_decrypt(esp->conf.tfm, sg, sg, elen);
+ err = crypto_blkcipher_decrypt(&desc, sg, sg, elen);
if (unlikely(sg != &esp->sgbuf[0]))
kfree(sg);
+ if (unlikely(err))
+ return err;
if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2))
BUG();
@@ -237,7 +253,7 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
* as per draft-ietf-ipsec-udp-encaps-06,
* section 3.1.2
*/
- if (!x->props.mode)
+ if (x->props.mode == XFRM_MODE_TRANSPORT)
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
@@ -254,9 +270,9 @@ out:
static u32 esp4_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. */
@@ -293,11 +309,11 @@ static void esp_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;
@@ -307,6 +323,7 @@ static void esp_destroy(struct xfrm_state *x)
static int esp_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) {
@@ -322,22 +339,27 @@ static int esp_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)) {
+ crypto_hash_digestsize(hash)) {
NETDEBUG(KERN_INFO "ESP: %s digestsize %u != %hu\n",
x->aalg->alg_name,
- crypto_tfm_alg_digestsize(esp->auth.tfm),
+ crypto_hash_digestsize(hash),
aalg_desc->uinfo.auth.icv_fullbits/8);
goto error;
}
@@ -351,24 +373,22 @@ static int esp_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 ip_esp_hdr) + esp->conf.ivlen;
- if (x->props.mode)
+ if (x->props.mode == XFRM_MODE_TUNNEL)
x->props.header_len += sizeof(struct iphdr);
if (x->encap) {
struct xfrm_encap_tmpl *encap = x->encap;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-10 19:34:01 +0000