crypto: echainiv - Use generic geniv init/exit helpers

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

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

diff --git a/crypto/echainiv.c b/crypto/echainiv.c
index 806ebe7..b96a845 100644 (file)
--- a/crypto/echainiv.c
+++ b/crypto/echainiv.c
@@ -19,8 +19,6 @@
  */
 
 #include <crypto/internal/geniv.h>
-#include <crypto/null.h>
-#include <crypto/rng.h>
 #include <crypto/scatterwalk.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -33,13 +31,6 @@
 
 #define MAX_IV_SIZE 16
 
-struct echainiv_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 DEFINE_PER_CPU(u32 [MAX_IV_SIZE / sizeof(u32)], echainiv_iv);
 
 /* We don't care if we get preempted and read/write IVs from the next CPU. */
@@ -103,7 +94,7 @@ static void echainiv_encrypt_complete(struct crypto_async_request *base,
 static int echainiv_encrypt(struct aead_request *req)
 {
        struct crypto_aead *geniv = crypto_aead_reqtfm(req);
-       struct echainiv_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;
@@ -114,7 +105,7 @@ static int echainiv_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 = echainiv_encrypt_complete;
        data = req;
@@ -160,7 +151,7 @@ static int echainiv_encrypt(struct aead_request *req)
 static int echainiv_decrypt(struct aead_request *req)
 {
        struct crypto_aead *geniv = crypto_aead_reqtfm(req);
-       struct echainiv_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;
@@ -169,7 +160,7 @@ static int echainiv_decrypt(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;
@@ -184,53 +175,6 @@ static int echainiv_decrypt(struct aead_request *req)
        return crypto_aead_decrypt(subreq);
 }
 
-static int echainiv_init(struct crypto_aead *geniv)
-{
-       struct echainiv_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 void echainiv_exit(struct crypto_aead *tfm)
-{
-       struct echainiv_ctx *ctx = crypto_aead_ctx(tfm);
-
-       crypto_free_aead(ctx->geniv.child);
-       crypto_put_default_null_skcipher();
-}
-
 static int echainiv_aead_create(struct crypto_template *tmpl,
                                struct rtattr **tb)
 {
@@ -255,11 +199,11 @@ static int echainiv_aead_create(struct crypto_template *tmpl,
        inst->alg.encrypt = echainiv_encrypt;
        inst->alg.decrypt = echainiv_decrypt;
 
-       inst->alg.init = echainiv_init;
-       inst->alg.exit = echainiv_exit;
+       inst->alg.init = aead_init_geniv;
+       inst->alg.exit = aead_exit_geniv;
 
        inst->alg.base.cra_alignmask |= __alignof__(u32) - 1;
-       inst->alg.base.cra_ctxsize = sizeof(struct echainiv_ctx);
+       inst->alg.base.cra_ctxsize = sizeof(struct aead_geniv_ctx);
        inst->alg.base.cra_ctxsize += inst->alg.ivsize;
 
        inst->free = aead_geniv_free;