ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/crypto/crypto_null.c b/marvell/linux/crypto/crypto_null.c
new file mode 100644
index 0000000..5b84b0f
--- /dev/null
+++ b/marvell/linux/crypto/crypto_null.c
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Cryptographic API.
+ *
+ * Null algorithms, aka Much Ado About Nothing.
+ *
+ * These are needed for IPsec, and may be useful in general for
+ * testing & debugging.
+ *
+ * The null cipher is compliant with RFC2410.
+ *
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ */
+
+#include <crypto/null.h>
+#include <crypto/internal/hash.h>
+#include <crypto/internal/skcipher.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+
+static DEFINE_MUTEX(crypto_default_null_skcipher_lock);
+static struct crypto_sync_skcipher *crypto_default_null_skcipher;
+static int crypto_default_null_skcipher_refcnt;
+
+static int null_compress(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ if (slen > *dlen)
+ return -EINVAL;
+ memcpy(dst, src, slen);
+ *dlen = slen;
+ return 0;
+}
+
+static int null_init(struct shash_desc *desc)
+{
+ return 0;
+}
+
+static int null_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return 0;
+}
+
+static int null_final(struct shash_desc *desc, u8 *out)
+{
+ return 0;
+}
+
+static int null_digest(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *out)
+{
+ return 0;
+}
+
+static int null_hash_setkey(struct crypto_shash *tfm, const u8 *key,
+ unsigned int keylen)
+{ return 0; }
+
+static int null_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{ return 0; }
+
+static int null_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+{ return 0; }
+
+static void null_crypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ memcpy(dst, src, NULL_BLOCK_SIZE);
+}
+
+static int null_skcipher_crypt(struct skcipher_request *req)
+{
+ struct skcipher_walk walk;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while (walk.nbytes) {
+ if (walk.src.virt.addr != walk.dst.virt.addr)
+ memcpy(walk.dst.virt.addr, walk.src.virt.addr,
+ walk.nbytes);
+ err = skcipher_walk_done(&walk, 0);
+ }
+
+ return err;
+}
+
+static struct shash_alg digest_null = {
+ .digestsize = NULL_DIGEST_SIZE,
+ .setkey = null_hash_setkey,
+ .init = null_init,
+ .update = null_update,
+ .finup = null_digest,
+ .digest = null_digest,
+ .final = null_final,
+ .base = {
+ .cra_name = "digest_null",
+ .cra_driver_name = "digest_null-generic",
+ .cra_blocksize = NULL_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static struct skcipher_alg skcipher_null = {
+ .base.cra_name = "ecb(cipher_null)",
+ .base.cra_driver_name = "ecb-cipher_null",
+ .base.cra_priority = 100,
+ .base.cra_blocksize = NULL_BLOCK_SIZE,
+ .base.cra_ctxsize = 0,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = NULL_KEY_SIZE,
+ .max_keysize = NULL_KEY_SIZE,
+ .ivsize = NULL_IV_SIZE,
+ .setkey = null_skcipher_setkey,
+ .encrypt = null_skcipher_crypt,
+ .decrypt = null_skcipher_crypt,
+};
+
+static struct crypto_alg null_algs[] = { {
+ .cra_name = "cipher_null",
+ .cra_driver_name = "cipher_null-generic",
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = NULL_BLOCK_SIZE,
+ .cra_ctxsize = 0,
+ .cra_module = THIS_MODULE,
+ .cra_u = { .cipher = {
+ .cia_min_keysize = NULL_KEY_SIZE,
+ .cia_max_keysize = NULL_KEY_SIZE,
+ .cia_setkey = null_setkey,
+ .cia_encrypt = null_crypt,
+ .cia_decrypt = null_crypt } }
+}, {
+ .cra_name = "compress_null",
+ .cra_driver_name = "compress_null-generic",
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
+ .cra_blocksize = NULL_BLOCK_SIZE,
+ .cra_ctxsize = 0,
+ .cra_module = THIS_MODULE,
+ .cra_u = { .compress = {
+ .coa_compress = null_compress,
+ .coa_decompress = null_compress } }
+} };
+
+MODULE_ALIAS_CRYPTO("compress_null");
+MODULE_ALIAS_CRYPTO("digest_null");
+MODULE_ALIAS_CRYPTO("cipher_null");
+
+struct crypto_sync_skcipher *crypto_get_default_null_skcipher(void)
+{
+ struct crypto_sync_skcipher *tfm;
+
+ mutex_lock(&crypto_default_null_skcipher_lock);
+ tfm = crypto_default_null_skcipher;
+
+ if (!tfm) {
+ tfm = crypto_alloc_sync_skcipher("ecb(cipher_null)", 0, 0);
+ if (IS_ERR(tfm))
+ goto unlock;
+
+ crypto_default_null_skcipher = tfm;
+ }
+
+ crypto_default_null_skcipher_refcnt++;
+
+unlock:
+ mutex_unlock(&crypto_default_null_skcipher_lock);
+
+ return tfm;
+}
+EXPORT_SYMBOL_GPL(crypto_get_default_null_skcipher);
+
+void crypto_put_default_null_skcipher(void)
+{
+ mutex_lock(&crypto_default_null_skcipher_lock);
+ if (!--crypto_default_null_skcipher_refcnt) {
+ crypto_free_sync_skcipher(crypto_default_null_skcipher);
+ crypto_default_null_skcipher = NULL;
+ }
+ mutex_unlock(&crypto_default_null_skcipher_lock);
+}
+EXPORT_SYMBOL_GPL(crypto_put_default_null_skcipher);
+
+static int __init crypto_null_mod_init(void)
+{
+ int ret = 0;
+
+ ret = crypto_register_algs(null_algs, ARRAY_SIZE(null_algs));
+ if (ret < 0)
+ goto out;
+
+ ret = crypto_register_shash(&digest_null);
+ if (ret < 0)
+ goto out_unregister_algs;
+
+ ret = crypto_register_skcipher(&skcipher_null);
+ if (ret < 0)
+ goto out_unregister_shash;
+
+ return 0;
+
+out_unregister_shash:
+ crypto_unregister_shash(&digest_null);
+out_unregister_algs:
+ crypto_unregister_algs(null_algs, ARRAY_SIZE(null_algs));
+out:
+ return ret;
+}
+
+static void __exit crypto_null_mod_fini(void)
+{
+ crypto_unregister_algs(null_algs, ARRAY_SIZE(null_algs));
+ crypto_unregister_shash(&digest_null);
+ crypto_unregister_skcipher(&skcipher_null);
+}
+
+subsys_initcall(crypto_null_mod_init);
+module_exit(crypto_null_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Null Cryptographic Algorithms");