From 909a3f0e9d8b0d8001cf6e99808f88eca8e44328 Mon Sep 17 00:00:00 2001 From: Cheng Lingfei Date: Mon, 24 Aug 2026 20:45:46 +0800 Subject: docs: cgroup-v2: fix misc.events key format description MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In misc cgroup, misc.events does not output a simple "max" key. Instead, each registered misc resource outputs a separate key suffixed with ".max" (i.e., ".max"). Update the documentation to clarify that the entry key is ".max". Suggested-by: Michal Koutný Signed-off-by: Cheng Lingfei Signed-off-by: Tejun Heo --- include/crypto/des.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 include/crypto/des.h (limited to 'include/crypto/des.h') diff --git a/include/crypto/des.h b/include/crypto/des.h new file mode 100644 index 000000000..73eec617f --- /dev/null +++ b/include/crypto/des.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * DES & Triple DES EDE Cipher Algorithms. + */ + +#ifndef __CRYPTO_DES_H +#define __CRYPTO_DES_H + +#include + +#define DES_KEY_SIZE 8 +#define DES_EXPKEY_WORDS 32 +#define DES_BLOCK_SIZE 8 + +#define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE) +#define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS) +#define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE + +struct des_ctx { + u32 expkey[DES_EXPKEY_WORDS]; +}; + +struct des3_ede_ctx { + u32 expkey[DES3_EDE_EXPKEY_WORDS]; +}; + +void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src); +void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src); + +void des3_ede_encrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src); +void des3_ede_decrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src); + +/** + * des_expand_key - Expand a DES input key into a key schedule + * @ctx: the key schedule + * @key: buffer containing the input key + * @keylen: size of the buffer contents + * + * Returns: 0 on success, -EINVAL if the input key is rejected and -ENOKEY if + * the key is accepted but has been found to be weak. + */ +int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen); + +/** + * des3_ede_expand_key - Expand a triple DES input key into a key schedule + * @ctx: the key schedule + * @key: buffer containing the input key + * @keylen: size of the buffer contents + * + * Returns: 0 on success, -EINVAL if the input key is rejected and -ENOKEY if + * the key is accepted but has been found to be weak. Note that weak keys will + * be rejected (and -EINVAL will be returned) when running in FIPS mode. + */ +int des3_ede_expand_key(struct des3_ede_ctx *ctx, const u8 *key, + unsigned int keylen); + +#endif /* __CRYPTO_DES_H */ -- cgit v1.3.1