diff --git a/bsp/dp32g030/aes.h b/bsp/dp32g030/aes.h new file mode 100644 index 0000000..c5cc39f --- /dev/null +++ b/bsp/dp32g030/aes.h @@ -0,0 +1,87 @@ +/* Copyright 2023 Dual Tachyon + * https://github.com/DualTachyon + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef HARDWARE_DP32G030_AES_H +#define HARDWARE_DP32G030_AES_H + +#if !defined(__ASSEMBLY__) +#include +#endif + +/* -------- AES -------- */ +#define AES_BASE_ADDR 0x400BD000U +#define AES_BASE_SIZE 0x00000800U + +#define AES_CR_ADDR (AES_BASE_ADDR + 0x0000U) +#define AES_CR (*(volatile uint32_t *)AES_CR_ADDR) +#define AES_CR_EN_SHIFT 0 +#define AES_CR_EN_WIDTH 1 +#define AES_CR_EN_MASK (((1U << AES_CR_EN_WIDTH) - 1U) << AES_CR_EN_SHIFT) +#define AES_CR_EN_VALUE_DISABLE 0U +#define AES_CR_EN_BITS_DISABLE (AES_CR_EN_VALUE_DISABLE << AES_CR_EN_SHIFT) +#define AES_CR_EN_VALUE_ENABLE 1U +#define AES_CR_EN_BITS_ENABLE (AES_CR_EN_VALUE_ENABLE << AES_CR_EN_SHIFT) + +#define AES_CR_CHMOD_SHIFT 5 +#define AES_CR_CHMOD_WIDTH 2 +#define AES_CR_CHMOD_MASK (((1U << AES_CR_CHMOD_WIDTH) - 1U) << AES_CR_CHMOD_SHIFT) +#define AES_CR_CHMOD_VALUE_ECB 0U +#define AES_CR_CHMOD_BITS_ECB (AES_CR_CHMOD_VALUE_ECB << AES_CR_CHMOD_SHIFT) +#define AES_CR_CHMOD_VALUE_CBC 1U +#define AES_CR_CHMOD_BITS_CBC (AES_CR_CHMOD_VALUE_CBC << AES_CR_CHMOD_SHIFT) +#define AES_CR_CHMOD_VALUE_CTR 2U +#define AES_CR_CHMOD_BITS_CTR (AES_CR_CHMOD_VALUE_CTR << AES_CR_CHMOD_SHIFT) + +#define AES_CR_CCFC_SHIFT 7 +#define AES_CR_CCFC_WIDTH 1 +#define AES_CR_CCFC_MASK (((1U << AES_CR_CCFC_WIDTH) - 1U) << AES_CR_CCFC_SHIFT) +#define AES_CR_CCFC_VALUE_SET 1U +#define AES_CR_CCFC_BITS_SET (AES_CR_CCFC_VALUE_SET << AES_CR_CCFC_SHIFT) + +#define AES_SR_ADDR (AES_BASE_ADDR + 0x0004U) +#define AES_SR (*(volatile uint32_t *)AES_SR_ADDR) +#define AES_SR_CCF_SHIFT 0 +#define AES_SR_CCF_WIDTH 1 +#define AES_SR_CCF_MASK (((1U << AES_SR_CCF_WIDTH) - 1U) << AES_SR_CCF_SHIFT) +#define AES_SR_CCF_VALUE_NOT_COMPLETE 0U +#define AES_SR_CCF_BITS_NOT_COMPLETE (AES_SR_CCF_VALUE_NOT_COMPLETE << AES_SR_CCF_SHIFT) +#define AES_SR_CCF_VALUE_COMPLETE 1U +#define AES_SR_CCF_BITS_COMPLETE (AES_SR_CCF_VALUE_COMPLETE << AES_SR_CCF_SHIFT) + +#define AES_DINR_ADDR (AES_BASE_ADDR + 0x0008U) +#define AES_DINR (*(volatile uint32_t *)AES_DINR_ADDR) +#define AES_DOUTR_ADDR (AES_BASE_ADDR + 0x000CU) +#define AES_DOUTR (*(volatile uint32_t *)AES_DOUTR_ADDR) +#define AES_KEYR0_ADDR (AES_BASE_ADDR + 0x0010U) +#define AES_KEYR0 (*(volatile uint32_t *)AES_KEYR0_ADDR) +#define AES_KEYR1_ADDR (AES_BASE_ADDR + 0x0014U) +#define AES_KEYR1 (*(volatile uint32_t *)AES_KEYR1_ADDR) +#define AES_KEYR2_ADDR (AES_BASE_ADDR + 0x0018U) +#define AES_KEYR2 (*(volatile uint32_t *)AES_KEYR2_ADDR) +#define AES_KEYR3_ADDR (AES_BASE_ADDR + 0x001CU) +#define AES_KEYR3 (*(volatile uint32_t *)AES_KEYR3_ADDR) +#define AES_IVR0_ADDR (AES_BASE_ADDR + 0x0020U) +#define AES_IVR0 (*(volatile uint32_t *)AES_IVR0_ADDR) +#define AES_IVR1_ADDR (AES_BASE_ADDR + 0x0024U) +#define AES_IVR1 (*(volatile uint32_t *)AES_IVR1_ADDR) +#define AES_IVR2_ADDR (AES_BASE_ADDR + 0x0028U) +#define AES_IVR2 (*(volatile uint32_t *)AES_IVR2_ADDR) +#define AES_IVR3_ADDR (AES_BASE_ADDR + 0x002CU) +#define AES_IVR3 (*(volatile uint32_t *)AES_IVR3_ADDR) + + +#endif + diff --git a/driver/aes.c b/driver/aes.c new file mode 100644 index 0000000..3691bc6 --- /dev/null +++ b/driver/aes.c @@ -0,0 +1,72 @@ +/* Copyright 2023 Dual Tachyon + * https://github.com/DualTachyon + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include + +#include "bsp/dp32g030/aes.h" +#include "driver/aes.h" + +static void AES_Setup_ENC_CBC(bool IsDecrypt, const void *pKey, const void *pIv) +{ + const uint32_t *pK = (const uint32_t *)pKey; + const uint32_t *pI = (const uint32_t *)pI; + + AES_CR = (AES_CR & ~AES_CR_EN_MASK) | AES_CR_EN_VALUE_DISABLE; + AES_CR = AES_CR_CHMOD_VALUE_CBC; + AES_KEYR3 = pK[0]; + AES_KEYR2 = pK[1]; + AES_KEYR1 = pK[2]; + AES_KEYR0 = pK[3]; + AES_IVR3 = pI[0]; + AES_IVR2 = pI[1]; + AES_IVR1 = pI[2]; + AES_IVR0 = pI[3]; + AES_CR = (AES_CR & ~AES_CR_EN_MASK) | AES_CR_EN_VALUE_ENABLE; +} + +static void AES_Transform(const void *pIn, void *pOut) +{ + const uint32_t *pI = (const uint32_t *)pI; + uint32_t *pO = (uint32_t *)pO; + + AES_DINR = pI[0]; + AES_DINR = pI[1]; + AES_DINR = pI[2]; + AES_DINR = pI[3]; + + while ((AES_SR & AES_SR_CCF_MASK) == AES_SR_CCF_VALUE_NOT_COMPLETE) { + } + + pO[0] = AES_DOUTR; + pO[1] = AES_DOUTR; + pO[2] = AES_DOUTR; + pO[3] = AES_DOUTR; + + AES_CR |= AES_CR_CCFC_VALUE_SET; +} + +void AES_Encrypt(const void *pKey, const void *pIv, const void *pIn, void *pOut, uint8_t NumBlocks) +{ + const uint8_t *pI = (const uint8_t *)pI; + uint8_t *pO = (uint8_t *)pO; + uint8_t i; + + AES_Setup_ENC_CBC(0, pKey, pIv); + for (i = 0; i < NumBlocks; i++) { + AES_Transform(pI + (i * 16), pO + (i * 16)); + } +} + diff --git a/driver/aes.h b/driver/aes.h new file mode 100644 index 0000000..9aa75e5 --- /dev/null +++ b/driver/aes.h @@ -0,0 +1,25 @@ +/* Copyright 2023 Dual Tachyon + * https://github.com/DualTachyon + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef DRIVER_AES_H +#define DRIVER_AES_H + +#include + +void AES_Encrypt(const void *pKey, const void *pIv, const void *pIn, void *pOut, uint8_t NumBlocks); + +#endif +