395 lines
12 KiB
C
395 lines
12 KiB
C
/**************************************************************************//**
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* @file crypto.c
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* @version V1.10
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* $Revision: 3 $
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* $Date: 15/06/12 9:42a $
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* @brief Cryptographic Accelerator driver source file
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*
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* @note
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* SPDX-License-Identifier: Apache-2.0
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* Copyright (C) 2015 Nuvoton Technology Corp. All rights reserved.
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*****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include "N9H30.h"
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#include "nu_crypto.h"
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/** @addtogroup N9H30_Device_Driver N9H30 Device Driver
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@{
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*/
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/** @addtogroup N9H30_CRYPTO_Driver CRYPTO Driver
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@{
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*/
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/** @addtogroup N9H30_CRYPTO_EXPORTED_FUNCTIONS CRYPTO Exported Functions
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@{
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*/
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/// @cond HIDDEN_SYMBOLS
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static uint32_t g_AES_CTL[4];
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static uint32_t g_TDES_CTL[4];
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/// @endcond HIDDEN_SYMBOLS
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/**
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* @brief Open PRNG function
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* @param[in] u32KeySize is PRNG key size, including:
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* - \ref PRNG_KEY_SIZE_64
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* - \ref PRNG_KEY_SIZE_128
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* - \ref PRNG_KEY_SIZE_192
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* - \ref PRNG_KEY_SIZE_256
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* @param[in] u32SeedReload is PRNG seed reload or not, including:
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* - \ref PRNG_SEED_CONT
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* - \ref PRNG_SEED_RELOAD
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* @param[in] u32Seed The new seed. Only valid when u32SeedReload is PRNG_SEED_RELOAD.
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* @return None
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*/
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void PRNG_Open(uint32_t u32KeySize, uint32_t u32SeedReload, uint32_t u32Seed)
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{
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if (u32SeedReload)
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CRPT->PRNG_SEED = u32Seed;
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CRPT->PRNG_CTL = (u32KeySize << CRPT_PRNG_CTL_KEYSZ_Pos) |
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(u32SeedReload << CRPT_PRNG_CTL_SEEDRLD_Pos);
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}
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/**
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* @brief Start to generate one PRNG key.
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* @return None
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*/
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void PRNG_Start(void)
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{
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CRPT->PRNG_CTL |= CRPT_PRNG_CTL_START_Msk;
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}
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/**
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* @brief Read the PRNG key.
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* @param[out] u32RandKey The key buffer to store newly generated PRNG key.
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* @return None
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*/
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void PRNG_Read(uint32_t u32RandKey[])
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{
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uint32_t i, wcnt;
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wcnt = (((CRPT->PRNG_CTL & CRPT_PRNG_CTL_KEYSZ_Msk) >> CRPT_PRNG_CTL_KEYSZ_Pos) + 1U) * 2U;
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for (i = 0U; i < wcnt; i++)
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{
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u32RandKey[i] = CRPT->PRNG_KEY[i];
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}
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CRPT->PRNG_CTL &= ~CRPT_PRNG_CTL_SEEDRLD_Msk;
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}
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/**
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* @brief Open AES encrypt/decrypt function.
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* @param[in] u32Channel AES channel. Must be 0~3.
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* @param[in] u32EncDec 1: AES encode; 0: AES decode
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* @param[in] u32OpMode AES operation mode, including:
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* - \ref AES_MODE_ECB
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* - \ref AES_MODE_CBC
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* - \ref AES_MODE_CFB
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* - \ref AES_MODE_OFB
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* - \ref AES_MODE_CTR
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* - \ref AES_MODE_CBC_CS1
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* - \ref AES_MODE_CBC_CS2
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* - \ref AES_MODE_CBC_CS3
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* @param[in] u32KeySize is AES key size, including:
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* - \ref AES_KEY_SIZE_128
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* - \ref AES_KEY_SIZE_192
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* - \ref AES_KEY_SIZE_256
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* @param[in] u32SwapType is AES input/output data swap control, including:
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* - \ref AES_NO_SWAP
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* - \ref AES_OUT_SWAP
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* - \ref AES_IN_SWAP
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* - \ref AES_IN_OUT_SWAP
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* @return None
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*/
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void AES_Open(uint32_t u32Channel, uint32_t u32EncDec,
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uint32_t u32OpMode, uint32_t u32KeySize, uint32_t u32SwapType)
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{
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CRPT->AES_CTL = (u32Channel << CRPT_AES_CTL_CHANNEL_Pos) |
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(u32EncDec << CRPT_AES_CTL_ENCRPT_Pos) |
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(u32OpMode << CRPT_AES_CTL_OPMODE_Pos) |
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(u32KeySize << CRPT_AES_CTL_KEYSZ_Pos) |
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(u32SwapType << CRPT_AES_CTL_OUTSWAP_Pos);
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g_AES_CTL[u32Channel] = CRPT->AES_CTL;
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}
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/**
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* @brief Start AES encrypt/decrypt
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* @param[in] u32Channel AES channel. Must be 0~3.
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* @param[in] u32DMAMode AES DMA control, including:
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* - \ref CRYPTO_DMA_ONE_SHOT One shop AES encrypt/decrypt.
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* - \ref CRYPTO_DMA_CONTINUE Continuous AES encrypt/decrypt.
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* - \ref CRYPTO_DMA_LAST Last AES encrypt/decrypt of a series of AES_Start.
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* @return None
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*/
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void AES_Start(int32_t u32Channel, uint32_t u32DMAMode)
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{
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CRPT->AES_CTL = g_AES_CTL[u32Channel];
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CRPT->AES_CTL |= CRPT_AES_CTL_START_Msk | (u32DMAMode << CRPT_AES_CTL_DMALAST_Pos);
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}
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/**
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* @brief Set AES keys
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* @param[in] u32Channel AES channel. Must be 0~3.
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* @param[in] au32Keys An word array contains AES keys.
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* @param[in] u32KeySize is AES key size, including:
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* - \ref AES_KEY_SIZE_128
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* - \ref AES_KEY_SIZE_192
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* - \ref AES_KEY_SIZE_256
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* @return None
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*/
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void AES_SetKey(uint32_t u32Channel, uint32_t au32Keys[], uint32_t u32KeySize)
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{
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int i, wcnt;
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uint32_t *key_ptr;
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key_ptr = (uint32_t *)((uint32_t)&CRPT->AES0_KEY0 + (u32Channel * 0x3C));
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wcnt = 4 + u32KeySize * 2;
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for (i = 0; i < wcnt; i++, key_ptr++)
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*key_ptr = au32Keys[i];
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}
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/**
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* @brief Set AES initial vectors
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* @param[in] u32Channel AES channel. Must be 0~3.
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* @param[in] au32IV A four entry word array contains AES initial vectors.
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* @return None
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*/
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void AES_SetInitVect(uint32_t u32Channel, uint32_t au32IV[])
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{
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int i;
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uint32_t *key_ptr;
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key_ptr = (uint32_t *)((uint32_t)&CRPT->AES0_IV0 + (u32Channel * 0x3C));
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for (i = 0; i < 4; i++, key_ptr++)
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*key_ptr = au32IV[i];
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}
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/**
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* @brief Set AES DMA transfer configuration.
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* @param[in] u32Channel AES channel. Must be 0~3.
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* @param[in] u32SrcAddr AES DMA source address
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* @param[in] u32DstAddr AES DMA destination address
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* @param[in] u32TransCnt AES DMA transfer byte count
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* @return None
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*/
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void AES_SetDMATransfer(uint32_t u32Channel, uint32_t u32SrcAddr,
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uint32_t u32DstAddr, uint32_t u32TransCnt)
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{
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*(uint32_t *)((uint32_t)&CRPT->AES0_SADDR + (u32Channel * 0x3C)) = u32SrcAddr;
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*(uint32_t *)((uint32_t)&CRPT->AES0_DADDR + (u32Channel * 0x3C)) = u32DstAddr;
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*(uint32_t *)((uint32_t)&CRPT->AES0_CNT + (u32Channel * 0x3C)) = u32TransCnt;
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}
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/**
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* @brief Open TDES encrypt/decrypt function.
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* @param[in] u32Channel TDES channel. Must be 0~3.
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* @param[in] u32EncDec 1: TDES encode; 0: TDES decode
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* @param[in] u32OpMode TDES operation mode, including:
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* - \ref TDES_MODE_ECB
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* - \ref TDES_MODE_CBC
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* - \ref TDES_MODE_CFB
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* - \ref TDES_MODE_OFB
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* - \ref TDES_MODE_CTR
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* @param[in] u32SwapType is TDES input/output data swap control and word swap control, including:
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* - \ref TDES_NO_SWAP
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* - \ref TDES_WHL_SWAP
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* - \ref TDES_OUT_SWAP
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* - \ref TDES_OUT_WHL_SWAP
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* - \ref TDES_IN_SWAP
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* - \ref TDES_IN_WHL_SWAP
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* - \ref TDES_IN_OUT_SWAP
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* - \ref TDES_IN_OUT_WHL_SWAP
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* @return None
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*/
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void TDES_Open(uint32_t u32Channel, uint32_t u32EncDec, int32_t Is3DES, int32_t Is3Key,
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uint32_t u32OpMode, uint32_t u32SwapType)
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{
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g_TDES_CTL[u32Channel] = (u32Channel << CRPT_TDES_CTL_CHANNEL_Pos) |
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(u32EncDec << CRPT_TDES_CTL_ENCRPT_Pos) |
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u32OpMode | (u32SwapType << CRPT_TDES_CTL_BLKSWAP_Pos);
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if (Is3DES)
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{
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g_TDES_CTL[u32Channel] |= CRPT_TDES_CTL_TMODE_Msk;
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}
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if (Is3Key)
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{
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g_TDES_CTL[u32Channel] |= CRPT_TDES_CTL_3KEYS_Msk;
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}
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}
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/**
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* @brief Start TDES encrypt/decrypt
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* @param[in] u32Channel TDES channel. Must be 0~3.
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* @param[in] u32DMAMode TDES DMA control, including:
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* - \ref CRYPTO_DMA_ONE_SHOT One shop TDES encrypt/decrypt.
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* - \ref CRYPTO_DMA_CONTINUE Continuous TDES encrypt/decrypt.
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* - \ref CRYPTO_DMA_LAST Last TDES encrypt/decrypt of a series of TDES_Start.
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* @return None
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*/
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void TDES_Start(int32_t u32Channel, uint32_t u32DMAMode)
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{
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g_TDES_CTL[u32Channel] |= CRPT_TDES_CTL_START_Msk | (u32DMAMode << CRPT_TDES_CTL_DMALAST_Pos);
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CRPT->TDES_CTL = g_TDES_CTL[u32Channel];
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}
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/**
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* @brief Set TDES keys
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* @param[in] u32Channel TDES channel. Must be 0~3.
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* @param[in] au8Keys The TDES keys.
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* @return None
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*/
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void TDES_SetKey(uint32_t u32Channel, uint32_t au32Keys[3][2])
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{
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int i;
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uint32_t *pu32TKey;
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pu32TKey = (uint32_t *)((uint32_t)&CRPT->TDES0_KEY1H + (0x40 * u32Channel));
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for (i = 0; i < 3; i++)
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{
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*pu32TKey = au32Keys[i][0]; /* TDESn_KEYxH */
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pu32TKey++;
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*pu32TKey = au32Keys[i][1]; /* TDESn_KEYxL */
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pu32TKey++;
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}
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}
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/**
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* @brief Set TDES initial vectors
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* @param[in] u32Channel TDES channel. Must be 0~3.
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* @param[in] u32IVH TDES initial vector high word.
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* @param[in] u32IVL TDES initial vector low word.
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* @return None
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*/
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void TDES_SetInitVect(uint32_t u32Channel, uint32_t u32IVH, uint32_t u32IVL)
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{
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*(uint32_t *)((uint32_t)&CRPT->TDES0_IVH + 0x40 * u32Channel) = u32IVH;
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*(uint32_t *)((uint32_t)&CRPT->TDES0_IVL + 0x40 * u32Channel) = u32IVL;
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}
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/**
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* @brief Set TDES DMA transfer configuration.
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* @param[in] u32Channel TDES channel. Must be 0~3.
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* @param[in] u32SrcAddr TDES DMA source address
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* @param[in] u32DstAddr TDES DMA destination address
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* @param[in] u32TransCnt TDES DMA transfer byte count
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* @return None
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*/
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void TDES_SetDMATransfer(uint32_t u32Channel, uint32_t u32SrcAddr,
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uint32_t u32DstAddr, uint32_t u32TransCnt)
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{
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*(uint32_t *)((uint32_t)&CRPT->TDES0_SADDR + (u32Channel * 0x40)) = u32SrcAddr;
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*(uint32_t *)((uint32_t)&CRPT->TDES0_DADDR + (u32Channel * 0x40)) = u32DstAddr;
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*(uint32_t *)((uint32_t)&CRPT->TDES0_CNT + (u32Channel * 0x40)) = u32TransCnt;
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}
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/**
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* @brief Open SHA encrypt function.
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* @param[in] u32OpMode SHA operation mode, including:
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* - \ref SHA_MODE_SHA1
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* - \ref SHA_MODE_SHA224
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* - \ref SHA_MODE_SHA256
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* - \ref SHA_MODE_SHA384
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* - \ref SHA_MODE_SHA512
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* @param[in] u32SwapType is SHA input/output data swap control, including:
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* - \ref SHA_NO_SWAP
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* - \ref SHA_OUT_SWAP
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* - \ref SHA_IN_SWAP
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* - \ref SHA_IN_OUT_SWAP
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* @param[in] hmac_key_len The length of HMAC key if HMAC is employed.
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* If HMAC is not used, just give hmac_key_len a zero value.
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* @return None
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*/
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void SHA_Open(uint32_t u32OpMode, uint32_t u32SwapType, int hmac_key_len)
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{
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CRPT->HMAC_CTL = (u32OpMode << CRPT_HMAC_CTL_OPMODE_Pos) |
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(u32SwapType << CRPT_HMAC_CTL_OUTSWAP_Pos);
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if (hmac_key_len > 0)
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{
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CRPT->HMAC_KEYCNT = hmac_key_len;
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CRPT->HMAC_CTL |= CRPT_HMAC_CTL_HMACEN_Msk;
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}
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}
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/**
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* @brief Start SHA encrypt
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* @param[in] u32DMAMode TDES DMA control, including:
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* - \ref CRYPTO_DMA_ONE_SHOT One shop SHA encrypt.
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* - \ref CRYPTO_DMA_CONTINUE Continuous SHA encrypt.
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* - \ref CRYPTO_DMA_LAST Last SHA encrypt of a series of SHA_Start.
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* @return None
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*/
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void SHA_Start(uint32_t u32DMAMode)
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{
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CRPT->HMAC_CTL &= ~(0x7 << CRPT_HMAC_CTL_DMALAST_Pos);
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CRPT->HMAC_CTL |= CRPT_HMAC_CTL_START_Msk | (u32DMAMode << CRPT_HMAC_CTL_DMALAST_Pos);
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}
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/**
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* @brief Set SHA DMA transfer
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* @param[in] u32SrcAddr SHA DMA source address
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* @param[in] u32TransCnt SHA DMA transfer byte count
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* @return None
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*/
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void SHA_SetDMATransfer(uint32_t u32SrcAddr, uint32_t u32TransCnt)
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{
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CRPT->HMAC_SADDR = u32SrcAddr;
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CRPT->HMAC_DMACNT = u32TransCnt;
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}
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/**
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* @brief Read the SHA digest.
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* @param[out] u32Digest The SHA encrypt output digest.
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* @return None
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*/
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void SHA_Read(uint32_t u32Digest[])
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{
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uint32_t i, wcnt;
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i = (CRPT->HMAC_CTL & CRPT_HMAC_CTL_OPMODE_Msk) >> CRPT_HMAC_CTL_OPMODE_Pos;
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if (i == SHA_MODE_SHA1)
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{
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wcnt = 5UL;
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}
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else if (i == SHA_MODE_SHA224)
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{
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wcnt = 7UL;
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}
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else if (i == SHA_MODE_SHA256)
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{
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wcnt = 8UL;
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}
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else if (i == SHA_MODE_SHA384)
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{
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wcnt = 12UL;
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}
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else
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{
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/* SHA_MODE_SHA512 */
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wcnt = 16UL;
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}
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for (i = 0; i < wcnt; i++)
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u32Digest[i] = *(uint32_t *)((uint32_t) & (CRPT->HMAC_DGST0) + (i * 4));
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}
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/*@}*/ /* end of group N9H30_CRYPTO_EXPORTED_FUNCTIONS */
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/*@}*/ /* end of group N9H30_CRYPTO_Driver */
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/*@}*/ /* end of group N9H30_Device_Driver */
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/*** (C) COPYRIGHT 2015 Nuvoton Technology Corp. ***/
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