LXR linux/drivers/crypto/caam/key

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * CAAM/SEC 4.x definitions for handling key-generation jobs
   4 *
   5 * Copyright 2008-2011 Freescale Semiconductor, Inc.
   6 *
   7 */
   8
   9/**
  10 * split_key_len - Compute MDHA split key length for a given algorithm
  11 * @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
  12 *        SHA224, SHA384, SHA512.
  13 *
  14 * Return: MDHA split key length
  15 */
  16static inline u32 split_key_len(u32 hash)
  17{
  18        /* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */
  19        static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 };
  20        u32 idx;
  21
  22        idx = (hash & OP_ALG_ALGSEL_SUBMASK) >> OP_ALG_ALGSEL_SHIFT;
  23
  24        return (u32)(mdpadlen[idx] * 2);
  25}
  26
  27/**
  28 * split_key_pad_len - Compute MDHA split key pad length for a given algorithm
  29 * @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
  30 *        SHA224, SHA384, SHA512.
  31 *
  32 * Return: MDHA split key pad length
  33 */
  34static inline u32 split_key_pad_len(u32 hash)
  35{
  36        return ALIGN(split_key_len(hash), 16);
  37}
  38
  39struct split_key_result {
  40        struct completion completion;
  41        int err;
  42};
  43
  44void split_key_done(struct device *dev, u32 *desc, u32 err, void *context);
  45
  46int gen_split_key(struct device *jrdev, u8 *key_out,
  47                  struct alginfo * const adata, const u8 *key_in, u32 keylen,
  48                  int max_keylen);
  49