crypto: gcm - Only access common skcipher fields on spawn

As skcipher spawns may be of the type lskcipher, only the common
fields may be accessed.  This was already the case but use the
correct helpers to make this more obvious.

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

diff --git a/crypto/gcm.c b/crypto/gcm.c
index 4ba624450c3ffb51234174bfacec393f4c8c1526..91ce6e0e2afc1400a6112538b3768fc5607eccce 100644 (file)
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -576,10 +576,10 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
                                    const char *ctr_name,
                                    const char *ghash_name)
 {
+       struct skcipher_alg_common *ctr;
        u32 mask;
        struct aead_instance *inst;
        struct gcm_instance_ctx *ctx;
-       struct skcipher_alg *ctr;
        struct hash_alg_common *ghash;
        int err;
 
@@ -607,13 +607,12 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
                                   ctr_name, 0, mask);
        if (err)
                goto err_free_inst;
-       ctr = crypto_spawn_skcipher_alg(&ctx->ctr);
+       ctr = crypto_spawn_skcipher_alg_common(&ctx->ctr);
 
        /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */
        err = -EINVAL;
        if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 ||
-           crypto_skcipher_alg_ivsize(ctr) != 16 ||
-           ctr->base.cra_blocksize != 1)
+           ctr->ivsize != 16 || ctr->base.cra_blocksize != 1)
                goto err_free_inst;
 
        err = -ENAMETOOLONG;
@@ -634,7 +633,7 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
                                       ctr->base.cra_alignmask;
        inst->alg.base.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
        inst->alg.ivsize = GCM_AES_IV_SIZE;
-       inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr);
+       inst->alg.chunksize = ctr->chunksize;
        inst->alg.maxauthsize = 16;
        inst->alg.init = crypto_gcm_init_tfm;
        inst->alg.exit = crypto_gcm_exit_tfm;