94 lines
2.0 KiB
C
Executable File
94 lines
2.0 KiB
C
Executable File
/*
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* Exynos FMP cipher driver
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*
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* Copyright (C) 2016 Samsung Electronics Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/slab.h>
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#include <linux/buffer_head.h>
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#include <crypto/fmp.h>
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#include "fmp_fips_info.h"
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int fmp_cipher_set_key(struct fmp_test_data *fdata,
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const u8 *key, uint32_t key_len)
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{
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int ret = 0;
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struct fmp_crypto_info *ci;
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if (!fdata)
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return -EINVAL;
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ci = &fdata->ci;
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memset(ci->key, 0, FMP_MAX_KEY_SIZE);
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ci->key_size = key_len;
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if (ci->algo_mode == EXYNOS_FMP_ALGO_MODE_AES_CBC) {
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switch (key_len) {
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case FMP_KEY_SIZE_16:
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ci->fmp_key_size = EXYNOS_FMP_KEY_SIZE_16;
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break;
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case FMP_KEY_SIZE_32:
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ci->fmp_key_size = EXYNOS_FMP_KEY_SIZE_32;
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break;
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default:
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pr_err("%s: Invalid FMP CBC key size(%d)\n",
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__func__, key_len);
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ret = -EINVAL;
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goto err;
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}
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memcpy(ci->key, key, key_len);
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} else if (ci->algo_mode == EXYNOS_FMP_ALGO_MODE_AES_XTS) {
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switch (key_len >> 1) {
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case FMP_KEY_SIZE_16:
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ci->fmp_key_size = EXYNOS_FMP_KEY_SIZE_16;
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break;
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case FMP_KEY_SIZE_32:
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ci->fmp_key_size = EXYNOS_FMP_KEY_SIZE_32;
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break;
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default:
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pr_err("%s: Invalid FMP XTS key size(%d)\n",
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__func__, key_len);
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ret = -EINVAL;
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goto err;
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}
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memcpy(ci->key, key, key_len);
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} else {
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pr_err("%s: Invalid FMP encryption mode(%d)\n",
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__func__, ci->algo_mode);
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ret = -EINVAL;
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goto err;
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}
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err:
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return ret;
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}
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int fmp_cipher_set_iv(struct fmp_test_data *fdata,
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const u8 *iv, uint32_t iv_len)
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{
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int ret = 0;
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struct fmp_crypto_info *ci;
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if (!fdata) {
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pr_err("%s: Invalid fdata\n", __func__);
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return -EINVAL;
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}
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ci = &fdata->ci;
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if (iv_len != FMP_IV_SIZE_16) {
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pr_err("%s: Invalid FMP iv size(%d)\n", __func__, iv_len);
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ret = -EINVAL;
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goto err;
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}
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memset(fdata->iv, 0, FMP_IV_SIZE_16);
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memcpy(fdata->iv, iv, iv_len);
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err:
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return ret;
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}
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