crypto: cfb,ofb - Remove cfb and ofb

    
Remove the unused algorithms CFB/OFB.

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

1 files changed, 0 insertions, 106 deletions

diff --git a/crypto/ofb.c b/crypto/ofb.c
deleted file mode 100644
index b630fdecceee..000000000000
--- a/crypto/ofb.c
+++ /dev/null
@@ -1,106 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-/*
- * OFB: Output FeedBack mode
- *
- * Copyright (C) 2018 ARM Limited or its affiliates.
- * All rights reserved.
- */
-
-#include <crypto/algapi.h>
-#include <crypto/internal/cipher.h>
-#include <crypto/internal/skcipher.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-static int crypto_ofb_crypt(struct skcipher_request *req)
-{
-	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-	struct crypto_cipher *cipher = skcipher_cipher_simple(tfm);
-	const unsigned int bsize = crypto_cipher_blocksize(cipher);
-	struct skcipher_walk walk;
-	int err;
-
-	err = skcipher_walk_virt(&walk, req, false);
-
-	while (walk.nbytes >= bsize) {
-		const u8 *src = walk.src.virt.addr;
-		u8 *dst = walk.dst.virt.addr;
-		u8 * const iv = walk.iv;
-		unsigned int nbytes = walk.nbytes;
-
-		do {
-			crypto_cipher_encrypt_one(cipher, iv, iv);
-			crypto_xor_cpy(dst, src, iv, bsize);
-			dst += bsize;
-			src += bsize;
-		} while ((nbytes -= bsize) >= bsize);
-
-		err = skcipher_walk_done(&walk, nbytes);
-	}
-
-	if (walk.nbytes) {
-		crypto_cipher_encrypt_one(cipher, walk.iv, walk.iv);
-		crypto_xor_cpy(walk.dst.virt.addr, walk.src.virt.addr, walk.iv,
-			       walk.nbytes);
-		err = skcipher_walk_done(&walk, 0);
-	}
-	return err;
-}
-
-static int crypto_ofb_create(struct crypto_template *tmpl, struct rtattr **tb)
-{
-	struct skcipher_instance *inst;
-	struct crypto_alg *alg;
-	int err;
-
-	inst = skcipher_alloc_instance_simple(tmpl, tb);
-	if (IS_ERR(inst))
-		return PTR_ERR(inst);
-
-	alg = skcipher_ialg_simple(inst);
-
-	/* OFB mode is a stream cipher. */
-	inst->alg.base.cra_blocksize = 1;
-
-	/*
-	 * To simplify the implementation, configure the skcipher walk to only
-	 * give a partial block at the very end, never earlier.
-	 */
-	inst->alg.chunksize = alg->cra_blocksize;
-
-	inst->alg.encrypt = crypto_ofb_crypt;
-	inst->alg.decrypt = crypto_ofb_crypt;
-
-	err = skcipher_register_instance(tmpl, inst);
-	if (err)
-		inst->free(inst);
-
-	return err;
-}
-
-static struct crypto_template crypto_ofb_tmpl = {
-	.name = "ofb",
-	.create = crypto_ofb_create,
-	.module = THIS_MODULE,
-};
-
-static int __init crypto_ofb_module_init(void)
-{
-	return crypto_register_template(&crypto_ofb_tmpl);
-}
-
-static void __exit crypto_ofb_module_exit(void)
-{
-	crypto_unregister_template(&crypto_ofb_tmpl);
-}
-
-subsys_initcall(crypto_ofb_module_init);
-module_exit(crypto_ofb_module_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("OFB block cipher mode of operation");
-MODULE_ALIAS_CRYPTO("ofb");
-MODULE_IMPORT_NS(CRYPTO_INTERNAL);