277 lines
8.2 KiB
C
277 lines
8.2 KiB
C
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/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-04-25 tyx the first version
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <hw_symmetric.h>
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/**
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* @brief Creating Symmetric Encryption and Decryption Context
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*
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* @param device Hardware crypto device
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* @param type Type of symmetric crypto context
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*
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* @return Symmetric crypto context
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*/
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struct rt_hwcrypto_ctx *rt_hwcrypto_symmetric_create(struct rt_hwcrypto_device *device, hwcrypto_type type)
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{
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struct rt_hwcrypto_ctx *ctx;
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ctx = rt_hwcrypto_ctx_create(device, type, sizeof(struct hwcrypto_symmetric));
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return ctx;
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}
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/**
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* @brief Destroy Symmetric Encryption and Decryption Context
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*
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* @param ctx Symmetric crypto context
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*/
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void rt_hwcrypto_symmetric_destroy(struct rt_hwcrypto_ctx *ctx)
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{
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rt_hwcrypto_ctx_destroy(ctx);
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}
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/**
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* @brief This function performs a symmetric encryption or decryption operation
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*
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* @param ctx Symmetric crypto context
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* @param mode Operation mode. HWCRYPTO_MODE_ENCRYPT or HWCRYPTO_MODE_DECRYPT
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* @param length The length of the input data in Bytes. This must be a multiple of the block size
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* @param in The buffer holding the input data
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* @param out The buffer holding the output data
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_symmetric_crypt(struct rt_hwcrypto_ctx *ctx, hwcrypto_mode mode, rt_size_t length, const rt_uint8_t *in, rt_uint8_t *out)
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{
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struct hwcrypto_symmetric *symmetric_ctx;
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struct hwcrypto_symmetric_info symmetric_info;
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rt_err_t err;
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if (ctx == RT_NULL)
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{
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return -RT_EINVAL;
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}
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symmetric_ctx = (struct hwcrypto_symmetric *)ctx;
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if (symmetric_ctx->ops->crypt == RT_NULL)
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{
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return -RT_ERROR;
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}
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if (mode != HWCRYPTO_MODE_ENCRYPT && mode != HWCRYPTO_MODE_DECRYPT)
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{
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return -RT_EINVAL;
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}
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/* Input information packaging */
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symmetric_info.mode = mode;
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symmetric_info.in = in;
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symmetric_info.out = out;
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symmetric_info.length = length;
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/* Calling Hardware Encryption and Decryption Function */
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err = symmetric_ctx->ops->crypt(symmetric_ctx, &symmetric_info);
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/* clean up flags */
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symmetric_ctx->flags &= ~(SYMMTRIC_MODIFY_KEY | SYMMTRIC_MODIFY_IV | SYMMTRIC_MODIFY_IVOFF);
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return err;
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}
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/**
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* @brief Set Symmetric Encryption and Decryption Key
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*
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* @param ctx Symmetric crypto context
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* @param key The crypto key
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* @param bitlen The crypto key bit length
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_symmetric_setkey(struct rt_hwcrypto_ctx *ctx, const rt_uint8_t *key, rt_uint32_t bitlen)
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{
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struct hwcrypto_symmetric *symmetric_ctx;
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if (ctx && bitlen <= RT_HWCRYPTO_KEYBIT_MAX_SIZE)
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{
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symmetric_ctx = (struct hwcrypto_symmetric *)ctx;
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rt_memcpy(symmetric_ctx->key, key, bitlen >> 3);
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/* Record key length */
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symmetric_ctx->key_bitlen = bitlen;
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/* Key change flag set up */
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symmetric_ctx->flags |= SYMMTRIC_MODIFY_KEY;
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return RT_EOK;
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}
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return -RT_EINVAL;
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}
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/**
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* @brief Get Symmetric Encryption and Decryption Key
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*
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* @param ctx Symmetric crypto context
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* @param key The crypto key buffer
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* @param bitlen The crypto key bit length
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*
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* @return Key length of copy
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*/
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int rt_hwcrypto_symmetric_getkey(struct rt_hwcrypto_ctx *ctx, rt_uint8_t *key, rt_uint32_t bitlen)
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{
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struct hwcrypto_symmetric *symmetric_ctx = (struct hwcrypto_symmetric *)ctx;
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if (ctx && bitlen >= symmetric_ctx->key_bitlen)
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{
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rt_memcpy(key, symmetric_ctx->key, symmetric_ctx->key_bitlen >> 3);
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return symmetric_ctx->key_bitlen;
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}
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return 0;
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}
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/**
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* @brief Set Symmetric Encryption and Decryption initialization vector
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*
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* @param ctx Symmetric crypto context
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* @param iv The crypto initialization vector
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* @param len The crypto initialization vector length
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_symmetric_setiv(struct rt_hwcrypto_ctx *ctx, const rt_uint8_t *iv, rt_size_t len)
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{
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struct hwcrypto_symmetric *symmetric_ctx;
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if (ctx && len <= RT_HWCRYPTO_IV_MAX_SIZE)
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{
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symmetric_ctx = (struct hwcrypto_symmetric *)ctx;
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rt_memcpy(symmetric_ctx->iv, iv, len);
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symmetric_ctx->iv_len = len;
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/* IV change flag set up */
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symmetric_ctx->flags |= SYMMTRIC_MODIFY_IV;
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return RT_EOK;
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}
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return -RT_EINVAL;
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}
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/**
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* @brief Get Symmetric Encryption and Decryption initialization vector
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*
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* @param ctx Symmetric crypto context
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* @param iv The crypto initialization vector buffer
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* @param len The crypto initialization vector buffer length
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*
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* @return IV length of copy
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*/
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int rt_hwcrypto_symmetric_getiv(struct rt_hwcrypto_ctx *ctx, rt_uint8_t *iv, rt_size_t len)
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{
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struct hwcrypto_symmetric *symmetric_ctx = (struct hwcrypto_symmetric *)ctx;;
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if (ctx && len >= symmetric_ctx->iv_len)
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{
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rt_memcpy(iv, symmetric_ctx->iv, symmetric_ctx->iv_len);
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return symmetric_ctx->iv_len;
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}
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return 0;
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}
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/**
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* @brief Set offset in initialization vector
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*
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* @param ctx Symmetric crypto context
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* @param iv_off The offset in IV
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*/
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void rt_hwcrypto_symmetric_set_ivoff(struct rt_hwcrypto_ctx *ctx, rt_int32_t iv_off)
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{
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if (ctx)
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{
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((struct hwcrypto_symmetric *)ctx)->iv_off = iv_off;
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/* iv_off change flag set up */
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((struct hwcrypto_symmetric *)ctx)->flags |= SYMMTRIC_MODIFY_IVOFF;
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}
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}
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/**
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* @brief Get offset in initialization vector
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*
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* @param ctx Symmetric crypto context
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* @param iv_off It must point to a valid memory
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*/
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void rt_hwcrypto_symmetric_get_ivoff(struct rt_hwcrypto_ctx *ctx, rt_int32_t *iv_off)
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{
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if (ctx && iv_off)
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{
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*iv_off = ((struct hwcrypto_symmetric *)ctx)->iv_off;
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}
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}
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/**
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* @brief This function copy symmetric crypto context
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*
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* @param des The destination symmetric crypto context
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* @param src The symmetric crypto context to be copy
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_symmetric_cpy(struct rt_hwcrypto_ctx *des, const struct rt_hwcrypto_ctx *src)
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{
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struct hwcrypto_symmetric *symmetric_des = (struct hwcrypto_symmetric *)des;
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struct hwcrypto_symmetric *symmetric_src = (struct hwcrypto_symmetric *)src;
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if (des != RT_NULL && src != RT_NULL)
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{
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/* Copy Symmetric Encryption and Decryption Context Information */
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symmetric_des->flags = symmetric_src->flags ;
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symmetric_des->iv_len = symmetric_src->iv_len ;
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symmetric_des->iv_off = symmetric_src->iv_off ;
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symmetric_des->key_bitlen = symmetric_src->key_bitlen;
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rt_memcpy(symmetric_des->iv, symmetric_src->iv, symmetric_src->iv_len);
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rt_memcpy(symmetric_des->key, symmetric_src->key, symmetric_src->key_bitlen >> 3);
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/* Hardware context copy */
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return rt_hwcrypto_ctx_cpy(des, src);
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}
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return -RT_EINVAL;
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}
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/**
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* @brief Reset symmetric crypto context
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*
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* @param ctx Symmetric crypto context
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*/
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void rt_hwcrypto_symmetric_reset(struct rt_hwcrypto_ctx *ctx)
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{
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struct hwcrypto_symmetric *symmetric_ctx = (struct hwcrypto_symmetric *)ctx;
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if (ctx != RT_NULL)
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{
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/* Copy Symmetric Encryption and Decryption Context Information */
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symmetric_ctx->flags = 0x00;
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symmetric_ctx->iv_len = 0x00;
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symmetric_ctx->iv_off = 0x00;
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symmetric_ctx->key_bitlen = 0x00;
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rt_memset(symmetric_ctx->iv, 0, RT_HWCRYPTO_IV_MAX_SIZE);
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rt_memset(symmetric_ctx->key, 0, RT_HWCRYPTO_KEYBIT_MAX_SIZE >> 3);
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/* Hardware context reset */
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rt_hwcrypto_ctx_reset(ctx);
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}
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}
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/**
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* @brief Setting symmetric crypto context type
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*
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* @param ctx Symmetric crypto context
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* @param type Types of settings
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_symmetric_set_type(struct rt_hwcrypto_ctx *ctx, hwcrypto_type type)
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{
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return rt_hwcrypto_set_type(ctx, type);
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}
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