crypto_aes.c
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#include "crypto_aes.h"
#include "nsc.h"
uint8_t cipheredSessionKey[16];
uint8_t sessionIv[16];
void CRPT_IRQHandler()
{
if(AES_GET_INT_FLAG(CRPT))
{
g_AES_done = 1;
AES_CLR_INT_FLAG(CRPT);
}
}
void M2351_Crypto_Init(uint8_t channel, uint8_t modeAES)
{
if(modeAES != ENCRYPT && modeAES != DECRYPT)
printf("Error mode , mode must be ENCRYPT or DECRYPT value\n");
NVIC_EnableIRQ(CRPT_IRQn);
AES_ENABLE_INT(CRPT);
AES_Open(CRPT, channel, modeAES, AES_MODE_CBC, AES_KEY_SIZE_128, AES_IN_OUT_SWAP);
}
void M2351_Crypto_UseMasterKey()
{
CRPT_T *crpt = CRPT;
uint32_t u32Channel = 1;
/* Load Key */
uint32_t key_reg_addr;
// 0x3CUL : channel size
key_reg_addr = (uint32_t)&crpt->AES0_KEY[0] + (u32Channel * 0x3CUL);
/* Enable FMC ISP function */
FMC_Open();
outpw(key_reg_addr, FMC_ReadUID(0));
outpw(key_reg_addr+4UL, FMC_ReadUID(1));
outpw(key_reg_addr+8UL, FMC_ReadUID(2));
outpw(key_reg_addr+12UL, FMC_ReadUID(0));
//printf("\nmasterKey = %08x%08x%08x%08x\n",FMC_ReadUID(0),FMC_ReadUID(1),FMC_ReadUID(2),FMC_ReadUID(0));
/* Disable FMC ISP function */
FMC_Close();
//outpw(key_reg_addr, 0x2b7e1516);
//outpw(key_reg_addr+4UL, 0x28aed2a6);
//outpw(key_reg_addr+8UL, 0xabf71588);
//outpw(key_reg_addr+12UL, 0x09cf4f3c);
/* Load IV */
uint32_t iv_reg_addr;
iv_reg_addr = (uint32_t)&crpt->AES0_IV[0] + (u32Channel * 0x3CUL);
outpw(iv_reg_addr, 0x00000000);
outpw(iv_reg_addr+4UL, 0x00000000);
outpw(iv_reg_addr+8UL, 0x00000000);
outpw(iv_reg_addr+12UL, 0x00000000);
}
void M2351_Crypto_UseSessionKey(uint8_t channel)
{
uint8_t sessionKey[16] = {0};
//printf("&cipheredSessionKey = %p\n", cipheredSessionKey);
//printBlock(cipheredSessionKey);
//M2351_Crypto_Init(1, DECRYPT);
//M2351_Crypto_UseMasterKey();
//if (DEMO)
// printf("| Secure is running ... decrypt sessionKey |\n");
//M2351_Decrypt_Data(1, cipheredSessionKey, sessionKey);
//printf("&sessionKey = %p\n", sessionKey);
//printBlock(sessionKey);
if (DEMO)
printf("| Secure is running ... Use sessionKey |\n");
uint32_t tmp_sk[4];
uint32_t tmp_si[4];
for (uint8_t z = 0; z < 4; z++)
{
tmp_sk[z] = (sessionKey[0+(4*z)] << 24) | (sessionKey[1+(4*z)] << 16) | (sessionKey[2+(4*z)] << 8) | sessionKey[3+(4*z)];
tmp_si[z] = (sessionIv[0+(4*z)] << 24) | (sessionIv[1+(4*z)] << 16) | (sessionIv[2+(4*z)] << 8) | sessionIv[3+(4*z)];
}
AES_SetKey(CRPT, channel, tmp_sk, AES_KEY_SIZE_128);
AES_SetInitVect(CRPT, channel, tmp_si);
/* Reset memory */
for (uint8_t z = 0; z < 16; z++) sessionKey[z] = 0;
for (uint8_t z = 0; z < 4; z++) {
tmp_sk[z] = 0;
tmp_si[z] = 0;
}
}
/* Function M2351_encrypt_data is same as Nuvoton_M2351_decrypt_data */
void M2351_Encrypt_Data(uint8_t channel, uint8_t InputData[], uint8_t OutputData[])
{
//printf("AES ECB encrypt start.\n");
//printf("&inputData = %p\n",InputData);
//printf("&outputData = %p\n",OutputData);
AES_SetDMATransfer(CRPT, channel, (uint32_t)InputData, (uint32_t)OutputData, 16);
/*
printf("before start AES : \n"
"CRPT->AES0_CNT : %d\n"
"CRPT->AES0_DADDR : %d\n"
"CRPT->AES0_IV : %d\n"
"CRPT->AES0_KEY : %d\n"
"CRPT->AES0_SADDR : %d\n", CRPT->AES0_CNT,CRPT->AES0_DADDR,CRPT->AES0_IV, CRPT->AES0_KEY, CRPT->AES0_SADDR);
*/
g_AES_done = 0;
/* Start AES encrypt */
AES_Start(CRPT, channel, CRYPTO_DMA_ONE_SHOT);
/* Waiting for AES calculation */
while(!g_AES_done);
//printf("AES CBC encrypt done.\n");
}
/* Function M2351_decrypt_data is same as Nuvoton_M2351_encrypt_data */
void M2351_Decrypt_Data(uint8_t channel, uint8_t InputData[], uint8_t OutputData[])
{
//printf("AES ECB decrypt start.\n");
/*
printf("&inputData = %p\n",InputData);
printf("&outputData = %p\n",OutputData);
*/
AES_SetDMATransfer(CRPT, channel, (uint32_t)InputData, (uint32_t)OutputData, 16);
/*
printf("before start AES : \n"
"CRPT->AES0_CNT : %d\n"
"CRPT->AES0_DADDR : %d\n"
"CRPT->AES0_IV : %d\n"
"CRPT->AES0_KEY : %d\n"
"CRPT->AES0_SADDR : %d\n", CRPT->AES0_CNT,CRPT->AES0_DADDR,CRPT->AES0_IV, CRPT->AES0_KEY, CRPT->AES0_SADDR);
*/
g_AES_done = 0;
/* Start AES decrypt */
AES_Start(CRPT, channel, CRYPTO_DMA_ONE_SHOT);
/* Waiting for AES calculation */
while(!g_AES_done);
//printf("AES CBC decrypt done.\n");
}