关于aes128 c代码转java，代码如下，最好有详细解释

Question

#include
#include
#include
#include
#include "aes.h"

/*!

• CMAC/AES Message Integrity Code (MIC) Block B0 size */ #define LORAMAC_MIC_BLOCK_B0_SIZE 16

/*!

• MIC field computation initial data */ static uint8_t MicBlockB0[] = { 0x49, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

/*!

• Contains the computed MIC field. *
• \remark Only the 4 first bytes are used */ static uint8_t Mic[16];

/*!

• Encryption aBlock and sBlock */ static uint8_t aBlock[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static uint8_t sBlock[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

static aes_context AesContext;

#define LORAWAN_NWKSKEY { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C }

/*!

• AES encryption/decryption cipher application session key */ #define LORAWAN_APPSKEY { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C }

void LoRaMacPayloadEncrypt( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint8_t *encBuffer )
{
uint16_t i;
uint8_t bufferIndex = 0;
uint16_t ctr = 1;

memset1( AesContext.ksch, '\0', 240 );
aes_set_key( key, 16, &AesContext );

aBlock[5] = dir;

aBlock[6] = ( address ) & 0xFF;
aBlock[7] = ( address >> 8 ) & 0xFF;
aBlock[8] = ( address >> 16 ) & 0xFF;
aBlock[9] = ( address >> 24 ) & 0xFF;

aBlock[10] = ( sequenceCounter ) & 0xFF;
aBlock[11] = ( sequenceCounter >> 8 ) & 0xFF;
aBlock[12] = ( sequenceCounter >> 16 ) & 0xFF;
aBlock[13] = ( sequenceCounter >> 24 ) & 0xFF;

while( size >= 16 )
{
    aBlock[15] = ( ( ctr ) & 0xFF );
    ctr++;
    aes_encrypt( aBlock, sBlock, &AesContext );
    for( i = 0; i < 16; i++ )
    {
        encBuffer[bufferIndex + i] = buffer[bufferIndex + i] ^ sBlock[i];
    }
    size -= 16;
    bufferIndex += 16;
}

if( size > 0 )
{
    aBlock[15] = ( ( ctr ) & 0xFF );
    aes_encrypt( aBlock, sBlock, &AesContext );
    for( i = 0; i < size; i++ )
    {
        encBuffer[bufferIndex + i] = buffer[bufferIndex + i] ^ sBlock[i];
    }
}

}

void LoRaMacPayloadDecrypt( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint8_t *decBuffer )
{
LoRaMacPayloadEncrypt( buffer, size, key, address, dir, sequenceCounter, decBuffer );
}

uint8_t netkey[16] = LORAWAN_NWKSKEY;
uint8_t appkey[16] = LORAWAN_APPSKEY;
uint8_t buff1[255] = { 0 } ;
unsigned char realkey[16] = { 0 };
unsigned char realkey1[16] = { 0 };

void main(int argc,char *argv[] )
{
if (argc <= 2 ){
printf("I need three parameters.\n1st.Sequence number (frame count)\n2nd.Node mac address in hex format"
"\n13rd.Payload data, string of hex characters with a space in the last. Space in the last is must.\n4th.Payload data size, string in ASCII.\n5th. appkey string of hex\n");
exit(0);
}
uint16_t i ;
char * hello;
char * pEnd;

int sequence= atoi(argv[1]);
uint32_t nodeAddress= (uint32_t) strtol(argv[2], &hello, 16);
uint8_t finalData[248];
char *data=argv[3];
int count=0;
char temp[5];
int realCount=0;
int frame_count= (int) strlen(data);

for (int j = 0; j < frame_count; ++j) {
    if(data[j]!=' '){
        temp[count++]=data[j];
    }else {
        finalData[realCount++] = (uint8_t) strtol(temp, &pEnd, 16);
        count=0;
    }
}


int c2i( char ch )
{
        if(isdigit(ch))
            return ch-48;
        if(ch<'A'||(ch>'F'&&ch<'a')||ch>'z')
            return-1;
        if(isalpha(ch))
            return isupper(ch)?ch-55:ch-87;
        return -1;
}

int hex2dec( unsigned char *hex )
{
    int len;
    int num=0;
    int temp;
    int bits;
    int i;
    len=strlen(hex);
    for(i=0,temp=0;i<len;i++,temp=0)
    {
        temp=c2i(*(hex+i));
        bits=(len-i-1)*4;
        temp=temp<<bits;
        num=num|temp;
    }
    return num;
}


char *temKey = argv[5];
unsigned char mkey[3]={0};

for( char i = 0; i < strlen(temKey); i++ ){
    if( i % 2 == 0 ){
        mkey[0] = temKey[i];
    }else{
        mkey[1] = temKey[i];
        mkey[2] = '\0';
        realkey[i/2] = hex2dec( mkey );
        memset( mkey, 0 , sizeof mkey);
    }
}

for( char i = 0; i < sizeof realkey; i++ ){
    realkey1[i]=realkey[i];
}


//0x0063dfa9
LoRaMacPayloadDecrypt( finalData, atoi(argv[4]), realkey1, nodeAddress , 0, sequence, buff1);
for(  i = 0; i < atoi(argv[4]); i++ )
{
    printf("%x ", buff1[i] );
}
printf("\n");

}

Answer 1

谁能把LoRaMacPayloadEncrypt这个方法，变成java代码也行。。。