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