crypto: seqiv - Use generic geniv init/exit helpers

This patch replaces the seqiv init/exit handlers with the generic
geniv helpers.

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

1 files changed, 7 insertions, 68 deletions

diff --git a/crypto/seqiv.c b/crypto/seqiv.c
index 3d8b02b80872..15a749a5cab7 100644
--- a/crypto/seqiv.c
+++ b/crypto/seqiv.c
@@ -15,7 +15,6 @@
 
 #include <crypto/internal/geniv.h>
 #include <crypto/internal/skcipher.h>
-#include <crypto/null.h>
 #include <crypto/rng.h>
 #include <crypto/scatterwalk.h>
 #include <linux/err.h>
@@ -31,13 +30,6 @@ struct seqiv_ctx {
         u8 salt[] __attribute__ ((aligned(__alignof__(u32))));
 };
 
-struct seqiv_aead_ctx {
-        /* aead_geniv_ctx must be first the element */
-        struct aead_geniv_ctx geniv;
-        struct crypto_blkcipher *null;
-        u8 salt[] __attribute__ ((aligned(__alignof__(u32))));
-};
-
 static void seqiv_free(struct crypto_instance *inst);
 
 static void seqiv_complete2(struct skcipher_givcrypt_request *req, int err)
@@ -155,7 +147,7 @@ static int seqiv_givencrypt(struct skcipher_givcrypt_request *req)
 static int seqiv_aead_encrypt(struct aead_request *req)
 {
         struct crypto_aead *geniv = crypto_aead_reqtfm(req);
-        struct seqiv_aead_ctx *ctx = crypto_aead_ctx(geniv);
+        struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);
         struct aead_request *subreq = aead_request_ctx(req);
         crypto_completion_t compl;
         void *data;
@@ -166,7 +158,7 @@ static int seqiv_aead_encrypt(struct aead_request *req)
         if (req->cryptlen < ivsize)
                 return -EINVAL;
 
-        aead_request_set_tfm(subreq, ctx->geniv.child);
+        aead_request_set_tfm(subreq, ctx->child);
 
         compl = req->base.complete;
         data = req->base.data;
@@ -213,7 +205,7 @@ static int seqiv_aead_encrypt(struct aead_request *req)
 static int seqiv_aead_decrypt(struct aead_request *req)
 {
         struct crypto_aead *geniv = crypto_aead_reqtfm(req);
-        struct seqiv_aead_ctx *ctx = crypto_aead_ctx(geniv);
+        struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);
         struct aead_request *subreq = aead_request_ctx(req);
         crypto_completion_t compl;
         void *data;
@@ -222,7 +214,7 @@ static int seqiv_aead_decrypt(struct aead_request *req)
         if (req->cryptlen < ivsize + crypto_aead_authsize(geniv))
                 return -EINVAL;
 
-        aead_request_set_tfm(subreq, ctx->geniv.child);
+        aead_request_set_tfm(subreq, ctx->child);
 
         compl = req->base.complete;
         data = req->base.data;
@@ -258,59 +250,6 @@ static int seqiv_init(struct crypto_tfm *tfm)
         return err ?: skcipher_geniv_init(tfm);
 }
 
-static int seqiv_aead_init_common(struct crypto_aead *geniv,
-                                  unsigned int reqsize)
-{
-        struct seqiv_aead_ctx *ctx = crypto_aead_ctx(geniv);
-        int err;
-
-        spin_lock_init(&ctx->geniv.lock);
-
-        crypto_aead_set_reqsize(geniv, sizeof(struct aead_request));
-
-        err = crypto_get_default_rng();
-        if (err)
-                goto out;
-
-        err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
-                                   crypto_aead_ivsize(geniv));
-        crypto_put_default_rng();
-        if (err)
-                goto out;
-
-        ctx->null = crypto_get_default_null_skcipher();
-        err = PTR_ERR(ctx->null);
-        if (IS_ERR(ctx->null))
-                goto out;
-
-        err = aead_geniv_init(crypto_aead_tfm(geniv));
-        if (err)
-                goto drop_null;
-
-        ctx->geniv.child = geniv->child;
-        geniv->child = geniv;
-
-out:
-        return err;
-
-drop_null:
-        crypto_put_default_null_skcipher();
-        goto out;
-}
-
-static int seqiv_aead_init(struct crypto_aead *tfm)
-{
-        return seqiv_aead_init_common(tfm, sizeof(struct aead_request));
-}
-
-static void seqiv_aead_exit(struct crypto_aead *tfm)
-{
-        struct seqiv_aead_ctx *ctx = crypto_aead_ctx(tfm);
-
-        crypto_free_aead(ctx->geniv.child);
-        crypto_put_default_null_skcipher();
-}
-
 static int seqiv_ablkcipher_create(struct crypto_template *tmpl,
                                    struct rtattr **tb)
 {
@@ -370,10 +309,10 @@ static int seqiv_aead_create(struct crypto_template *tmpl, struct rtattr **tb)
         inst->alg.encrypt = seqiv_aead_encrypt;
         inst->alg.decrypt = seqiv_aead_decrypt;
 
-        inst->alg.init = seqiv_aead_init;
-        inst->alg.exit = seqiv_aead_exit;
+        inst->alg.init = aead_init_geniv;
+        inst->alg.exit = aead_exit_geniv;
 
-        inst->alg.base.cra_ctxsize = sizeof(struct seqiv_aead_ctx);
+        inst->alg.base.cra_ctxsize = sizeof(struct aead_geniv_ctx);
         inst->alg.base.cra_ctxsize += inst->alg.ivsize;
 
         err = aead_register_instance(tmpl, inst);