X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=crypto%2Fgcm.c;h=9f740857f9f9895eec32d98b61491eaa3fbf8454;hp=1a252639ef9154bb0747e488ff8f4c272ff757ca;hb=3cc0730eef779b6d7e27d6dfa5bd81f76a2baa0c;hpb=ae0935776c3c7f4c99d0b3909755fe0896277d0e

diff --git a/crypto/gcm.c b/crypto/gcm.c
index 1a252639ef91..9f740857f9f9 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -44,6 +44,7 @@ struct crypto_rfc4543_ctx {
 
 struct crypto_rfc4543_req_ctx {
 	u8 auth_tag[16];
+	u8 assocbuf[32];
 	struct scatterlist cipher[1];
 	struct scatterlist payload[2];
 	struct scatterlist assoc[2];
@@ -102,7 +103,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 	struct crypto_ablkcipher *ctr = ctx->ctr;
 	struct {
 		be128 hash;
-		u8 iv[8];
+		u8 iv[16];
 
 		struct crypto_gcm_setkey_result result;
 
@@ -139,10 +140,8 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 
 	err = crypto_ablkcipher_encrypt(&data->req);
 	if (err == -EINPROGRESS || err == -EBUSY) {
-		err = wait_for_completion_interruptible(
-			&data->result.completion);
-		if (!err)
-			err = data->result.err;
+		wait_for_completion(&data->result.completion);
+		err = data->result.err;
 	}
 
 	if (err)
@@ -710,7 +709,9 @@ static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb,
 
 	ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,
 				    CRYPTO_ALG_TYPE_HASH,
-				    CRYPTO_ALG_TYPE_AHASH_MASK);
+				    CRYPTO_ALG_TYPE_AHASH_MASK |
+				    crypto_requires_sync(algt->type,
+							 algt->mask));
 	err = PTR_ERR(ghash_alg);
 	if (IS_ERR(ghash_alg))
 		return ERR_PTR(err);
@@ -1102,6 +1103,21 @@ static int crypto_rfc4543_setauthsize(struct crypto_aead *parent,
 	return crypto_aead_setauthsize(ctx->child, authsize);
 }
 
+static void crypto_rfc4543_done(struct crypto_async_request *areq, int err)
+{
+	struct aead_request *req = areq->data;
+	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+	struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req);
+
+	if (!err) {
+		scatterwalk_map_and_copy(rctx->auth_tag, req->dst,
+					 req->cryptlen,
+					 crypto_aead_authsize(aead), 1);
+	}
+
+	aead_request_complete(req, err);
+}
+
 static struct aead_request *crypto_rfc4543_crypt(struct aead_request *req,
 						 int enc)
 {
@@ -1142,14 +1158,27 @@ static struct aead_request *crypto_rfc4543_crypt(struct aead_request *req,
 	scatterwalk_crypto_chain(payload, dst, vdst == req->iv + 8, 2);
 	assoclen += 8 + req->cryptlen - (enc ? 0 : authsize);
 
-	sg_init_table(assoc, 2);
-	sg_set_page(assoc, sg_page(req->assoc), req->assoc->length,
-		    req->assoc->offset);
+	if (req->assoc->length == req->assoclen) {
+		sg_init_table(assoc, 2);
+		sg_set_page(assoc, sg_page(req->assoc), req->assoc->length,
+			    req->assoc->offset);
+	} else {
+		BUG_ON(req->assoclen > sizeof(rctx->assocbuf));
+
+		scatterwalk_map_and_copy(rctx->assocbuf, req->assoc, 0,
+					 req->assoclen, 0);
+
+		sg_init_table(assoc, 2);
+		sg_set_buf(assoc, rctx->assocbuf, req->assoclen);
+	}
 	scatterwalk_crypto_chain(assoc, payload, 0, 2);
 
 	aead_request_set_tfm(subreq, ctx->child);
-	aead_request_set_callback(subreq, req->base.flags, req->base.complete,
-				  req->base.data);
+	aead_request_set_callback(subreq, req->base.flags, crypto_rfc4543_done,
+				  req);
+	if (!enc)
+		aead_request_set_callback(subreq, req->base.flags,
+					  req->base.complete, req->base.data);
 	aead_request_set_crypt(subreq, cipher, cipher, enc ? 0 : authsize, iv);
 	aead_request_set_assoc(subreq, assoc, assoclen);
 
@@ -1363,6 +1392,7 @@ module_exit(crypto_gcm_module_exit);
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Galois/Counter Mode");
 MODULE_AUTHOR("Mikko Herranen <mh1@iki.fi>");
-MODULE_ALIAS("gcm_base");
-MODULE_ALIAS("rfc4106");
-MODULE_ALIAS("rfc4543");
+MODULE_ALIAS_CRYPTO("gcm_base");
+MODULE_ALIAS_CRYPTO("rfc4106");
+MODULE_ALIAS_CRYPTO("rfc4543");
+MODULE_ALIAS_CRYPTO("gcm");