From 443c0d7ed9d3815b3425ca12d65337d52b9a0c34 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 7 Aug 2015 16:00:04 +0800
Subject: [PATCH] crypto: authencesn - Fix breakage with new ESP code
The ESP code has been updated to generate a completely linear
AD SG list. This unfortunately broke authencesn which expects
the AD to be divided into at least three parts.
This patch fixes it to cope with the new format. Later we will
fix it properly to accept arbitrary input and not rely on the
input being linear as part of the AEAD conversion.
Fixes: 7021b2e1cddd ("esp4: Switch to new AEAD interface")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
crypto/authencesn.c | 44 ++++++++++++--------------------------------
1 file changed, 12 insertions(+), 32 deletions(-)
diff --git a/crypto/authencesn.c b/crypto/authencesn.c
index a3da6770bc9e..b8efe36ce114 100644
--- a/crypto/authencesn.c
+++ b/crypto/authencesn.c
@@ -393,8 +393,6 @@ static int crypto_authenc_esn_genicv(struct aead_request *req, u8 *iv,
struct scatterlist *cipher = areq_ctx->cipher;
struct scatterlist *hsg = areq_ctx->hsg;
struct scatterlist *tsg = areq_ctx->tsg;
- struct scatterlist *assoc1;
- struct scatterlist *assoc2;
unsigned int ivsize = crypto_aead_ivsize(authenc_esn);
unsigned int cryptlen = req->cryptlen;
struct page *dstp;
@@ -412,27 +410,19 @@ static int crypto_authenc_esn_genicv(struct aead_request *req, u8 *iv,
cryptlen += ivsize;
}
- if (sg_is_last(assoc))
- return -EINVAL;
-
- assoc1 = assoc + 1;
- if (sg_is_last(assoc1))
- return -EINVAL;
-
- assoc2 = assoc + 2;
- if (!sg_is_last(assoc2))
+ if (assoc->length < 12)
return -EINVAL;
sg_init_table(hsg, 2);
- sg_set_page(hsg, sg_page(assoc), assoc->length, assoc->offset);
- sg_set_page(hsg + 1, sg_page(assoc2), assoc2->length, assoc2->offset);
+ sg_set_page(hsg, sg_page(assoc), 4, assoc->offset);
+ sg_set_page(hsg + 1, sg_page(assoc), 4, assoc->offset + 8);
sg_init_table(tsg, 1);
- sg_set_page(tsg, sg_page(assoc1), assoc1->length, assoc1->offset);
+ sg_set_page(tsg, sg_page(assoc), 4, assoc->offset + 4);
areq_ctx->cryptlen = cryptlen;
- areq_ctx->headlen = assoc->length + assoc2->length;
- areq_ctx->trailen = assoc1->length;
+ areq_ctx->headlen = 8;
+ areq_ctx->trailen = 4;
areq_ctx->sg = dst;
areq_ctx->complete = authenc_esn_geniv_ahash_done;
@@ -563,8 +553,6 @@ static int crypto_authenc_esn_iverify(struct aead_request *req, u8 *iv,
struct scatterlist *cipher = areq_ctx->cipher;
struct scatterlist *hsg = areq_ctx->hsg;
struct scatterlist *tsg = areq_ctx->tsg;
- struct scatterlist *assoc1;
- struct scatterlist *assoc2;
unsigned int ivsize = crypto_aead_ivsize(authenc_esn);
struct page *srcp;
u8 *vsrc;
@@ -580,27 +568,19 @@ static int crypto_authenc_esn_iverify(struct aead_request *req, u8 *iv,
cryptlen += ivsize;
}
- if (sg_is_last(assoc))
- return -EINVAL;
-
- assoc1 = assoc + 1;
- if (sg_is_last(assoc1))
- return -EINVAL;
-
- assoc2 = assoc + 2;
- if (!sg_is_last(assoc2))
+ if (assoc->length < 12)
return -EINVAL;
sg_init_table(hsg, 2);
- sg_set_page(hsg, sg_page(assoc), assoc->length, assoc->offset);
- sg_set_page(hsg + 1, sg_page(assoc2), assoc2->length, assoc2->offset);
+ sg_set_page(hsg, sg_page(assoc), 4, assoc->offset);
+ sg_set_page(hsg + 1, sg_page(assoc), 4, assoc->offset + 8);
sg_init_table(tsg, 1);
- sg_set_page(tsg, sg_page(assoc1), assoc1->length, assoc1->offset);
+ sg_set_page(tsg, sg_page(assoc), 4, assoc->offset + 4);
areq_ctx->cryptlen = cryptlen;
- areq_ctx->headlen = assoc->length + assoc2->length;
- areq_ctx->trailen = assoc1->length;
+ areq_ctx->headlen = 8;
+ areq_ctx->trailen = 4;
areq_ctx->sg = src;
areq_ctx->complete = authenc_esn_verify_ahash_done;