crypto: seqiv - Copy AD along with plain/cipher text

As the AD does not necessarily exist in the destination buffer
it must be copied along with the plain/cipher text.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/seqiv.c

@@ -315,19 +315,12 @@ static int seqiv_aead_encrypt_compat(struct aead_request *req)
 	data = req;
 
 	if (req->src != req->dst) {
-		struct scatterlist srcbuf[2];
-		struct scatterlist dstbuf[2];
 		struct blkcipher_desc desc = {
 			.tfm = ctx->null,
 		};
 
-		err = crypto_blkcipher_encrypt(
-			&desc,
-			scatterwalk_ffwd(dstbuf, req->dst,
-					 req->assoclen + ivsize),
-			scatterwalk_ffwd(srcbuf, req->src,
-					 req->assoclen + ivsize),
-			req->cryptlen - ivsize);
+		err = crypto_blkcipher_encrypt(&desc, req->dst, req->src,
+					       req->assoclen + req->cryptlen);
 		if (err)
 			return err;
 	}
@@ -373,19 +366,12 @@ static int seqiv_aead_encrypt(struct aead_request *req)
 	info = req->iv;
 
 	if (req->src != req->dst) {
-		struct scatterlist src[2];
-		struct scatterlist dst[2];
 		struct blkcipher_desc desc = {
 			.tfm = ctx->null,
 		};
 
-		err = crypto_blkcipher_encrypt(
-			&desc,
-			scatterwalk_ffwd(dst, req->dst,
-					 req->assoclen + ivsize),
-			scatterwalk_ffwd(src, req->src,
-					 req->assoclen + ivsize),
-			req->cryptlen - ivsize);
+		err = crypto_blkcipher_encrypt(&desc, req->dst, req->src,
+					       req->assoclen + req->cryptlen);
 		if (err)
 			return err;
 	}
@@ -446,19 +432,12 @@ static int seqiv_aead_decrypt_compat(struct aead_request *req)
 	}
 
 	if (req->src != req->dst) {
-		struct scatterlist srcbuf[2];
-		struct scatterlist dstbuf[2];
 		struct blkcipher_desc desc = {
 			.tfm = ctx->null,
 		};
 
-		err = crypto_blkcipher_encrypt(
-			&desc,
-			scatterwalk_ffwd(dstbuf, req->dst,
-					 req->assoclen + ivsize),
-			scatterwalk_ffwd(srcbuf, req->src,
-					 req->assoclen + ivsize),
-			req->cryptlen - ivsize);
+		err = crypto_blkcipher_encrypt(&desc, req->dst, req->src,
+					       req->assoclen + req->cryptlen);
 		if (err)
 			return err;
 	}