From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/crypto/aead.h | 87 +++++++++++++++++++------------------------
1 files changed, 38 insertions(+), 49 deletions(-)
diff --git a/kernel/include/crypto/aead.h b/kernel/include/crypto/aead.h
index c69c545..fe95662 100644
--- a/kernel/include/crypto/aead.h
+++ b/kernel/include/crypto/aead.h
@@ -1,13 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* AEAD: Authenticated Encryption with Associated Data
*
* Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
*/
#ifndef _CRYPTO_AEAD_H
@@ -48,27 +43,33 @@
*
* Memory Structure:
*
- * To support the needs of the most prominent user of AEAD ciphers, namely
- * IPSEC, the AEAD ciphers have a special memory layout the caller must adhere
- * to.
+ * The source scatterlist must contain the concatenation of
+ * associated data || plaintext or ciphertext.
*
- * The scatter list pointing to the input data must contain:
+ * The destination scatterlist has the same layout, except that the plaintext
+ * (resp. ciphertext) will grow (resp. shrink) by the authentication tag size
+ * during encryption (resp. decryption).
*
- * * for RFC4106 ciphers, the concatenation of
- * associated authentication data || IV || plaintext or ciphertext. Note, the
- * same IV (buffer) is also set with the aead_request_set_crypt call. Note,
- * the API call of aead_request_set_ad must provide the length of the AAD and
- * the IV. The API call of aead_request_set_crypt only points to the size of
- * the input plaintext or ciphertext.
+ * In-place encryption/decryption is enabled by using the same scatterlist
+ * pointer for both the source and destination.
*
- * * for "normal" AEAD ciphers, the concatenation of
- * associated authentication data || plaintext or ciphertext.
+ * Even in the out-of-place case, space must be reserved in the destination for
+ * the associated data, even though it won't be written to. This makes the
+ * in-place and out-of-place cases more consistent. It is permissible for the
+ * "destination" associated data to alias the "source" associated data.
*
- * It is important to note that if multiple scatter gather list entries form
- * the input data mentioned above, the first entry must not point to a NULL
- * buffer. If there is any potential where the AAD buffer can be NULL, the
- * calling code must contain a precaution to ensure that this does not result
- * in the first scatter gather list entry pointing to a NULL buffer.
+ * As with the other scatterlist crypto APIs, zero-length scatterlist elements
+ * are not allowed in the used part of the scatterlist. Thus, if there is no
+ * associated data, the first element must point to the plaintext/ciphertext.
+ *
+ * To meet the needs of IPsec, a special quirk applies to rfc4106, rfc4309,
+ * rfc4543, and rfc7539esp ciphers. For these ciphers, the final 'ivsize' bytes
+ * of the associated data buffer must contain a second copy of the IV. This is
+ * in addition to the copy passed to aead_request_set_crypt(). These two IV
+ * copies must not differ; different implementations of the same algorithm may
+ * behave differently in that case. Note that the algorithm might not actually
+ * treat the IV as associated data; nevertheless the length passed to
+ * aead_request_set_ad() must include it.
*/
struct crypto_aead;
@@ -115,7 +116,6 @@
* @setkey: see struct skcipher_alg
* @encrypt: see struct skcipher_alg
* @decrypt: see struct skcipher_alg
- * @geniv: see struct skcipher_alg
* @ivsize: see struct skcipher_alg
* @chunksize: see struct skcipher_alg
* @init: Initialize the cryptographic transformation object. This function
@@ -141,8 +141,6 @@
int (*decrypt)(struct aead_request *req);
int (*init)(struct crypto_aead *tfm);
void (*exit)(struct crypto_aead *tfm);
-
- const char *geniv;
unsigned int ivsize;
unsigned int maxauthsize;
@@ -237,6 +235,16 @@
return tfm->authsize;
}
+static inline unsigned int crypto_aead_alg_maxauthsize(struct aead_alg *alg)
+{
+ return alg->maxauthsize;
+}
+
+static inline unsigned int crypto_aead_maxauthsize(struct crypto_aead *aead)
+{
+ return crypto_aead_alg_maxauthsize(crypto_aead_alg(aead));
+}
+
/**
* crypto_aead_blocksize() - obtain block size of cipher
* @tfm: cipher handle
@@ -327,19 +335,11 @@
*
* Return: 0 if the cipher operation was successful; < 0 if an error occurred
*/
-static inline int crypto_aead_encrypt(struct aead_request *req)
-{
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
-
- if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
- return -ENOKEY;
-
- return crypto_aead_alg(aead)->encrypt(req);
-}
+int crypto_aead_encrypt(struct aead_request *req);
/**
* crypto_aead_decrypt() - decrypt ciphertext
- * @req: reference to the ablkcipher_request handle that holds all information
+ * @req: reference to the aead_request handle that holds all information
* needed to perform the cipher operation
*
* Decrypt ciphertext data using the aead_request handle. That data structure
@@ -359,18 +359,7 @@
* integrity of the ciphertext or the associated data was violated);
* < 0 if an error occurred.
*/
-static inline int crypto_aead_decrypt(struct aead_request *req)
-{
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
-
- if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
- return -ENOKEY;
-
- if (req->cryptlen < crypto_aead_authsize(aead))
- return -EINVAL;
-
- return crypto_aead_alg(aead)->decrypt(req);
-}
+int crypto_aead_decrypt(struct aead_request *req);
/**
* DOC: Asynchronous AEAD Request Handle
@@ -438,7 +427,7 @@
*/
static inline void aead_request_free(struct aead_request *req)
{
- kzfree(req);
+ kfree_sensitive(req);
}
/**
--
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