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[CRYPTO] gcm: Fix request context alignment 

This patch fixes the request context alignment so that it is actually
aligned to the value required by the algorithm.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2007-12-12 19:16:38 +08:00
parent 68b6c7d691
commit 2589469d7b
1 changed files with 14 additions and 7 deletions
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21
crypto/gcm.c
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@ -43,6 +43,14 @@ struct crypto_gcm_req_priv_ctx {
struct ablkcipher_request abreq;
};
static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_reqctx(
struct aead_request *req)
{
unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
}
static void crypto_gcm_ghash_init(struct crypto_gcm_ghash_ctx *ctx, u32 flags,
struct gf128mul_4k *gf128)
{
@ -224,7 +232,7 @@ static int crypto_gcm_init_crypt(struct ablkcipher_request *ablk_req,
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
u32 flags = req->base.tfm->crt_flags;
u8 *auth_tag = pctx->auth_tag;
u8 *counter = pctx->counter;
@ -256,7 +264,7 @@ static int crypto_gcm_init_crypt(struct ablkcipher_request *ablk_req,
static int crypto_gcm_hash(struct aead_request *req)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
u8 *auth_tag = pctx->auth_tag;
struct crypto_gcm_ghash_ctx *ghash = &pctx->ghash;
@ -281,7 +289,7 @@ static void crypto_gcm_encrypt_done(struct crypto_async_request *areq, int err)
static int crypto_gcm_encrypt(struct aead_request *req)
{
struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
struct ablkcipher_request *abreq = &pctx->abreq;
int err = 0;
@ -307,7 +315,7 @@ static void crypto_gcm_decrypt_done(struct crypto_async_request *areq, int err)
static int crypto_gcm_decrypt(struct aead_request *req)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
struct ablkcipher_request *abreq = &pctx->abreq;
u8 *auth_tag = pctx->auth_tag;
u8 *iauth_tag = pctx->iauth_tag;
@ -352,8 +360,7 @@ static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
ctx->ctr = ctr;
ctx->gf128 = NULL;
align = max_t(unsigned long, crypto_ablkcipher_alignmask(ctr),
__alignof__(u32) - 1);
align = crypto_tfm_alg_alignmask(tfm);
align &= ~(crypto_tfm_ctx_alignment() - 1);
tfm->crt_aead.reqsize = align +
sizeof(struct crypto_gcm_req_priv_ctx) +
@ -428,7 +435,7 @@ static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb)
inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
inst->alg.cra_priority = ctr->cra_priority;
inst->alg.cra_blocksize = 16;
inst->alg.cra_alignmask = __alignof__(u32) - 1;
inst->alg.cra_alignmask = ctr->cra_alignmask | (__alignof__(u64) - 1);
inst->alg.cra_type = &crypto_aead_type;
inst->alg.cra_aead.ivsize = 12;
inst->alg.cra_aead.maxauthsize = 16;