void Cipher()
{
int i, j, round=0;
for(i=0; i<4; i++)
{
for(j=0; j<4; j++)
{
state[j][i] = in[i*4 + j];
}
}
AddRoundKey(0);
for(round=1; round<Nr; round++)
{
SubBytes();
ShiftRows();
MixColumns();
AddRoundKey(round);
}
SubBytes();
ShiftRows();
AddRoundKey(Nr);
for(i=0; i<4; i++)
{
for(j=0; j<4; j++)
{
out[i*4+j]=state[j][i];
}
}
}
static void encryptBlock(unsigned char *in, unsigned char *out,
unsigned char *w, int Nr)
{
int round, i, j, n = 0;
state_t state;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
state[i][j] = in[n++];
}
}
AddRoundKey(&state, w, 0);
for (round = 1; round < Nr; round++) {
SubShiftRows(&state);
MixColumns(&state);
AddRoundKey(&state, w, round);
}
SubShiftRows(&state);
AddRoundKey(&state, w, Nr);
for (i = 0, n = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
out[n++] = state[i][j];
}
}
}
void aes_cipher(ctx_aes* aes, uint8_t* input, uint8_t* output) // encipher 16-bit input
{
// state = input
int i;
int round;
memset(&aes->State[0][0],0,16);
for (i = 0; i < (4 * aes->Nb); i++)//
{
aes->State[i % 4][ i / 4] = input[i];
}
AddRoundKey(aes, 0);
for (round = 1; round <= (aes->Nr - 1); round++) // main round loop
{
SubBytes(aes);
ShiftRows(aes);
MixColumns(aes);
AddRoundKey(aes, round);
} // main round loop
SubBytes(aes);
ShiftRows(aes);
AddRoundKey(aes, aes->Nr);
// output = state
for (i = 0; i < (4 * aes->Nb); i++)
{
output[i] = aes->State[i % 4][ i / 4];
}
} // Cipher()
/**
* @brief Encrypts 16 bytes of data.
*
* Based on Advanced Encryption Standard specification.
*
* @param dataToEncrypt Data to encrypt, must be at least 16 bytes in size.
* @param result Destination to store encrypted data, must be at least 16 bytes in size.
* @param numRounds Number of rounds.
* @param roundKey Round key.
*/
void ThreadMessageItemEncrypt::Cipher(unsigned char * dataToEncrypt,unsigned char * result, unsigned char numRounds, unsigned char * roundKey)
{
// Copy data into state for manipulation
for(size_t r = 0;r<EncryptKey::WORD_SIZE;r++)
{
for(size_t c = 0;c<EncryptKey::WORD_SIZE;c++)
{
state[r][c] = dataToEncrypt[r+(c*EncryptKey::WORD_SIZE)];
}
}
// Perform encryption operations
XorRoundKey(0,roundKey);
for(size_t r = 1; r<numRounds; r++)
{
SubBytes();
ShiftRowsLeft();
MixColumns();
XorRoundKey(r,roundKey);
}
SubBytes();
ShiftRowsLeft();
XorRoundKey(numRounds,roundKey);
// Copy state into data now that we have finished
for(int r = 0;r<EncryptKey::WORD_SIZE;r++)
{
for(int c = 0;c<EncryptKey::WORD_SIZE;c++)
{
result[r+(c*EncryptKey::WORD_SIZE)] = state[r][c];
}
}
}
unsigned char* AES::Cipher(unsigned char* input)
{
unsigned char state[4][4];
int i,r,c;
for(r=0; r<4; r++)
{
for(c=0; c<4 ;c++)
{
state[r][c] = input[c*4+r];
}
}
AddRoundKey(state,w[0]);
for(i=1; i<=10; i++)
{
SubBytes(state);
ShiftRows(state);
if(i!=10)MixColumns(state);
AddRoundKey(state,w[i]);
}
for(r=0; r<4; r++)
{
for(c=0; c<4 ;c++)
{
input[c*4+r] = state[r][c];
}
}
return input;
}
void AES_enc(BYTE* input, BYTE* output,BYTE *w,BYTE Nr)
{
DWORD i;
DWORD round;
BYTE gState[4][4];
AES_Memset(&gState[0][0],0,16);
for( i=0;i<4*NB;i++)
{
gState[i%4][i/4]=input[i];
}
AddRoundKey(0,w,gState);
for ( round = 1; round <= (Nr - 1); round++)
{
SubBytes(gState);
ShiftRows(gState);
MixColumns(gState);
AddRoundKey(round,w,gState);
} // main round loop
SubBytes(gState);
ShiftRows(gState);
AddRoundKey(Nr,w,gState);
// output = state
for (i = 0; i < (4 * NB); i++)
{
output[i] = gState[i % 4][ i / 4];
}
}
void Cipher(unsigned char* input, unsigned char* output) // encipher 16-bit input
{
// state = input
int i, round;
memset(&State[0][0],0,16);
for (i = 0; i < (4 * Nb); i++)//
{
State[i % 4][ i / 4] = input[i];
//State[i / 4][ i % 4] = input[i];
}
//Dump();
AddRoundKey(0);
for (round = 1; round <= (Nr - 1); round++) // main round loop
{
SubBytes();
ShiftRows();
MixColumns();
AddRoundKey(round);
} // main round loop
SubBytes();
ShiftRows();
AddRoundKey(Nr);
// output = state
for (i = 0; i < (4 * Nb); i++)
{
output[i] = State[i % 4][ i / 4];
}
} // Cipher()
void
AES_CPU_Impl_O0::EncryptBlock(UINT8 *dst, const UINT8 *src)
{
UINT8 m_state[m_Nb][4];
for( UINT32 i = 0; i < 4; i++ )
for( UINT32 j = 0; j < 4; j++ )
m_state[j][i] = src[i*4 + j];
// Add the First round key to the state before starting the rounds.
AddRoundKey(m_state, 0);
// There will be m_Nr rounds.
// The first m_Nr-1 rounds are identical.
// These m_Nr-1 rounds are executed in the loop below.
for( UINT32 round = 1; round < m_Nr; round++ )
{
SubBytes(m_state);
ShiftRows(m_state);
MixColumns(m_state);
AddRoundKey(m_state, round);
}
// The last round is given below.
// The MixColumns function is not here in the last round.
SubBytes(m_state);
ShiftRows(m_state);
AddRoundKey(m_state, m_Nr);
for( UINT32 i = 0; i < 4; i++ )
for( UINT32 j = 0; j < 4; j++ )
dst[i*4 + j] = m_state[j][i];
}
// Cipher is the main function that encrypts the PlainText.
void Cipher(unsigned char out[16],
unsigned char in[16], unsigned char RoundKey[240], int Nr)
{
unsigned char state[4][4];
int i,j,round=0;
//Copy the input PlainText to state array.
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
state[j][i] = in[i*4 + j];
}
}
// Add the First round key to the state before starting the rounds.
AddRoundKey(state, RoundKey, 0);
#ifdef DEBUG_PRINTOUT
std::cerr << " ka="; printState(state); std::cerr << std::endl;
#endif
// There will be Nr rounds.
// The first Nr-1 rounds are identical.
// These Nr-1 rounds are executed in the loop below.
for(round=1;round<Nr;round++)
{
SubBytes(state);
#ifdef DEBUG_PRINTOUT
std::cerr << " sb="; printState(state); std::cerr << std::endl;
#endif
ShiftRows(state);
MixColumns(state);
#ifdef DEBUG_PRINTOUT
std::cerr << " mc="; printState(state); std::cerr << std::endl;
#endif
AddRoundKey(state, RoundKey, round);
#ifdef DEBUG_PRINTOUT
std::cerr << " ka="; printState(state); std::cerr << std::endl;
#endif
}
// The last round is given below.
// The MixColumns function is not here in the last round.
SubBytes(state);
ShiftRows(state);
#ifdef DEBUG_PRINTOUT
std::cerr << " sr="; printState(state); std::cerr << std::endl;
#endif
AddRoundKey(state, RoundKey, Nr);
#ifdef DEBUG_PRINTOUT
std::cerr << " ka="; printState(state); std::cerr << std::endl;
#endif
// The encryption process is over.
// Copy the state array to output array.
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
out[i*4+j]=state[j][i];
}
}
}
void proest_inverse_permute(proest_ctx *x) {
int round;
for (round = PROEST_NROUNDS-1; round >= 0; --round) {
AddConstant(x, round);
ShiftRegistersInverse(x, round);
MixColumns(x);
SubBits(x);
}
}
// Cipher is the main function that encrypts the PlainText.
void Cipher()
{
int i,j,round=0;
//Copy the input PlainText to state array.
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
state[j][i] = in[i*4 + j];
}
}
// Add the First round key to the state before starting the rounds.
AddRoundKey(0);
// There will be Nr rounds.
// The first Nr-1 rounds are identical.
// These Nr-1 rounds are executed in the loop below.
for(round=1;round<Nr;round++)
{
SubBytes();
ShiftRows();
MixColumns();
AddRoundKey(round);
// for(i=0;i<4;i++)
// {
// for(j=0;j<4;j++)
// {
// // out[i*4+j]=state[j][i];
// printf("%02x",state[j][i]);
// }
// }
printf("\n");
}
// The last round is given below.
// The MixColumns function is not here in the last round.
SubBytes();
ShiftRows();
AddRoundKey(Nr);
// The encryption process is over.
// Copy the state array to output array.
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
out[i*4+j]=state[j][i];
}
}
}
void proest_permute(proest_ctx *x)
{
int round;
for(round=0;round<PROEST_NROUNDS;round++)
{
SubBits(x);
MixColumns(x);
ShiftRegisters(x,round);
AddConstant(x,round);
}
}
static void
buildAESCircuit(GarbledCircuit *gc, block *inputLabels)
{
GarblingContext ctxt;
int q = 50000; //Just an upper bound
int r = 50000;
int *addKeyInputs = calloc(2 * m, sizeof(int));
int *addKeyOutputs = calloc(m, sizeof(int));
int *subBytesOutputs = calloc(m, sizeof(int));
int *shiftRowsOutputs = calloc(m, sizeof(int));
int *mixColumnOutputs = calloc(m, sizeof(int));
block *outputMap = allocate_blocks(2 * m);
createEmptyGarbledCircuit(gc, n, m, q, r, inputLabels);
startBuilding(gc, &ctxt);
countToN(addKeyInputs, 256);
for (int round = 0; round < roundLimit; round++) {
AddRoundKey(gc, &ctxt, addKeyInputs, addKeyOutputs);
for (int i = 0; i < 16; i++) {
SubBytes(gc, &ctxt, addKeyOutputs + 8 * i, subBytesOutputs + 8 * i);
}
ShiftRows(gc, &ctxt, subBytesOutputs, shiftRowsOutputs);
for (int i = 0; i < 4; i++) {
if (round != roundLimit - 1)
MixColumns(gc, &ctxt, shiftRowsOutputs + i * 32,
mixColumnOutputs + 32 * i);
}
for (int i = 0; i < 128; i++) {
addKeyInputs[i] = mixColumnOutputs[i];
addKeyInputs[i + 128] = (round + 2) * 128 + i;
}
}
finishBuilding(gc, &ctxt, outputMap, mixColumnOutputs);
/* writeCircuitToFile(gc, AES_CIRCUIT_FILE_NAME); */
free(addKeyInputs);
free(addKeyOutputs);
free(subBytesOutputs);
free(shiftRowsOutputs);
free(mixColumnOutputs);
free(outputMap);
}
line AesEncrypt(const void* encrypt_data,
const size_t encrypt_data_size,
const AesKey& encrypt_key)
{
unsigned char data[bytes_row_size][bytes_columns_size];
unsigned char expandkey[expand_key_size][bytes_row_size][bytes_columns_size];
unsigned char okdata[bytes_row_size*bytes_columns_size];
line ret;
const unsigned char* lp_encrypt = (const unsigned char*)encrypt_data;
KeyExpansion(encrypt_key._key,expandkey);
for(size_t encrypted = 0;
encrypted < encrypt_data_size;
encrypted += (bytes_row_size*bytes_columns_size))
{
for(size_t row = 0; row < bytes_row_size; ++row)
{
for(size_t col = 0; col < bytes_columns_size; ++col)
{
data[row][col] = lp_encrypt[row + col * bytes_columns_size];
}
}
AddRoundKey(data,expandkey[0]);
for(size_t i = 1; i < expand_key_size; ++i)
{
SubstituteBytes(data);
ShiftRows(data);
if(i != (expand_key_size - 1))
MixColumns(data);
AddRoundKey(data,expandkey[i]);
}
for(size_t row = 0; row < bytes_row_size; ++row)
{
for(size_t col = 0; col < bytes_columns_size; ++col)
{
okdata[row + col * bytes_columns_size] = data[row][col];
}
}
ret.append(okdata,sizeof(okdata));
lp_encrypt += bytes_row_size * bytes_columns_size;
}
return ret;
}
void AES128::encrypt16( unsigned char buffer[ 16 ] )
{
AddRoundKey( buffer, key_schedule[ 0 ] );
for ( register unsigned short r = 1; r < 10; ++r )
{
Substitution( buffer );
ShiftRows( buffer );
MixColumns( buffer );
AddRoundKey( buffer, key_schedule[ r ] );
}
Substitution( buffer );
ShiftRows( buffer );
AddRoundKey( buffer, key_schedule[ 10 ] );
}
/**
* EncryptBlock
*
* Encrypt a single block, stored in the buffer text. The buffer MUST be 16
* bytes in length!
* pKeys stores a complete key schedule for the round.
* The algorithm, call order and function names, follows the reference of
* FIPS-197, section 5.1.
*
* The encryption loop can be unrolled or left as is by using the
* unroll_encrypt_loop define.
*
* The encrypted data is returned in the text buffer.
*
* Note: Only 10 rounds and 128 bit keys are supported in this implementation.
*/
void EncryptBlock(void *pBlock, const u_int32_ard *pKeys)
{
// FIXME -- Use non-arduino-specific debug
#ifdef verbose_debug
Serial.println("\n\nStarting encrypt, plaintext is");
printBytes((byte_ard*)pBlock,16,16);
#endif
// XOR the first key to the first state
AddRoundKey(pBlock, pKeys, 0);
#if defined(unroll_encrypt_loop)
ntransform(pBlock, pKeys, 1);
ntransform(pBlock, pKeys, 2);
ntransform(pBlock, pKeys, 3);
ntransform(pBlock, pKeys, 4);
ntransform(pBlock, pKeys, 5);
ntransform(pBlock, pKeys, 6);
ntransform(pBlock, pKeys, 7);
ntransform(pBlock, pKeys, 8);
ntransform(pBlock, pKeys, 9);
#else
int round;
for (round=1; round<ROUNDS; round++)
{
// Fixme: Use non-arduino-specific debug
#ifdef verbose_debug
Serial.print("Encryption round ");
Serial.println(round);
#endif
SubAndShift(pBlock);
MixColumns(pBlock);
AddRoundKey(pBlock, pKeys, round);
}
#endif
// Fixme: Use non-arduino-specific debug
#ifdef verbose_debug
Serial.println("Encryption round 10");
#endif
// Now, do the final round of encryption
SubAndShift(pBlock);
AddRoundKey(pBlock, pKeys, 10); // add the last round key from the schedule
} //EncryptBlock()
void RijndaelEncrypt( uint8_t state[AES_BLOCK_SIZE], uint8_t eKey[AES_MAX_KEY_SIZE],int32_t Nr )
{
int32_t round = 0;
AddRoundKey(state,eKey,round);
for ( round = 1; round < Nr; ++round )
{
SubBytes(state);
ShiftRows(state);
MixColumns(state);
AddRoundKey(state,eKey,round);
}
SubBytes(state);
ShiftRows(state);
AddRoundKey(state,eKey,Nr);
}
static void Cipher(uint8x16_t RoundKey_v[])
{
uint8_t round = 0;
AddRoundKey(RoundKey_v[0]);
for(round = 1; round < rounds; ++round)
{
SubBytes();
ShiftRows();
MixColumns();
AddRoundKey(RoundKey_v[round]);
}
SubBytes();
ShiftRows();
AddRoundKey(RoundKey_v[rounds]);
}
// this is the function that takes a block of plaintext and the key schedule
// and encrypts it. the next level of abstraction would be to implement block
// modes using this function on each block
void EncryptBlock(uint8_t* block, uint8_t* key_schedule)
{
// the state is always 128 bits for AES. we are going to represent that as
// an array of 16 bytes. conceptually it can be useful to think of it as a
// 4x4 matrix
//
// step 1 of the cipher is to initialize the state as the input block of
// plaintext. we are just going to operate directly on the input block
// step 2 is to do an initial round key addition. the first round key is
// added by a simple bitwise xor operation
AddRoundKey(block, key_schedule[0, (4*4) - 1]);
// step 3 is Nr-1 rounds where Nr is the total number of rounds we will be
// performing. Nr is 10, 12, and 14 for keysizes of 128, 192, and 256
// respectively.
for (uint8_t round = 0; round < (10 - 1); round++) {
// the round function consists of four operations
//
// SubBytes subsitutes bytes in the state based on the standardized
// substitution boxes or S-Boxes
SubBytes(block);
// ShiftRows cyclically shifts each of the last three rows of state
// over by a different offset
ShiftRows(block);
// MixColumns does some math on the state, column by column
MixColumns(block);
// finally, we add the next round key to the state
AddRoundKey(block, key_schedule[round * (4*4), (round + 1) * 4 - 1]);
}
// step 4 is the final round. the only difference is that we do not
// perform the MixColumns operation on this one
SubBytes(block);
ShiftRows(block);
AddRoundKey(block, key_schedule[10 * (4*4), (10 + 1) * (4*4) - 1]);
// all of that fiddling with the state leaves us with the encrypted
// block
}
void test_MixColumns_full_input_col2(void)
{
int i;
unsigned char expected[] = {
0x00, 3, 0x00, 0x00,
0x00, 4, 0x00, 0x00,
0x00, 9, 0x00, 0x00,
0x00, 10, 0x00, 0x00};
unsigned char actual[] = {
0x00, 0x01, 0x00, 0x00,
0x00, 0x02, 0x00, 0x00,
0x00, 0x03, 0x00, 0x00,
0x00, 0x04, 0x00, 0x00};
MixColumns(actual);
for (i = 0; i < 4*4; i++)
{
CU_ASSERT_INT_EQ(expected[i], actual[i]);
}
}
void test_MixColumns_full_input_low_values(void)
{
int i;
unsigned char expected[] = {
23, 3, 15, 11,
16, 4, 8, 12,
45, 9, 21, 1,
54, 10, 30, 2};
unsigned char actual[] = {
13, 1, 5, 9,
14, 2, 6, 10,
15, 3, 7, 11,
16, 4, 8, 12};
MixColumns(actual);
for (i = 0; i < 4*4; i++)
{
CU_ASSERT_INT_EQ(expected[i], actual[i]);
}
}
/**
* This method performs decrypt operation given cipher.
* It read tables from tf and ciphertext from fp.
* Decrypts using key. Using fiestel structure, decrypts is nothigs but encryption
* with reverse round keys input.
*/
void ProcessDecrypt(char *key, FILE *tf, FILE *fp) {
table_check = 0;
ProcessTableCheck(tf);
char buf[16];
int ret = fread(buf, 1, 16, fp);
if (ret < 16) {
fprintf(stderr,
"Input size for decryption can not be less than 16 bytes\n");
exit(1);
}
int i, Nr = 10, Nb = 4, round;
unsigned char **state = (unsigned char **) malloc(
sizeof(unsigned char *) * 4);
for (i = 0; i < 4; i++)
state[i] = (unsigned char *) malloc(sizeof(unsigned char) * 4);
copyInStateArray(state, buf);
unsigned char **word = doProcessKeyExpand(key);
printOutD(state, "iinput", 0);
AddRoundKey(state, word, Nr * Nb);
printWordD(word, "ik_sch", Nr * Nb, 0);
for (round = Nr - 1; round > 0; round--) {
printOutD(state, "istart", Nr - round);
InvShiftRows(state);
printOutD(state, "is_row", Nr - round);
InvSubBytes(state);
printOutD(state, "is_box", Nr - round);
AddRoundKey(state, word, round * Nb);
printWordD(word, "ik_sch", round * Nb, Nr - round);
printOutD(state, "ik_add", Nr - round);
MixColumns(state, INVP);
}
printOutD(state, "istart", Nr - round);
InvShiftRows(state);
printOutD(state, "is_row", Nr - round);
InvSubBytes(state);
printOutD(state, "is_box", Nr - round);
AddRoundKey(state, word, 0);
printWordD(word, "ik_sch", round * Nb, Nr - round);
printOutD(state, "ioutput", Nr - round);
}
// encrypt is the main function that encrypts the PlainText.
void encrypt(uint8_t *out, uint8_t *in, uint8_t *expanded_key)
{
int i,j,round=0;
uint8_t state[4][4];
int Nr = 128/32+6;// replace 128 by 192, 256 for larger keys
//Copy the input PlainText to state array.
for(i=0; i<4; i++) {
for(j=0; j<4; j++) {
state[j][i] = in[i*4 + j];
}
}
// Add the First round key to the state before starting the rounds.
AddRoundKey(0,state,expanded_key);
// There will be Nr rounds.
// The first Nr-1 rounds are identical.
// These Nr-1 rounds are executed in the loop below.
for(round=1; round<Nr; round++) {
SubBytes(state);
ShiftRows(state);
MixColumns(state);
AddRoundKey(round,state,expanded_key);
}
// The last round is given below.
// The MixColumns function is not here in the last round.
SubBytes(state);
ShiftRows(state);
AddRoundKey(Nr,state,expanded_key);
// The encryption process is over.
// Copy the state array to output array.
for(i=0; i<4; i++) {
for(j=0; j<4; j++) {
out[i*4+j]=state[j][i];
}
}
}
void test_MixColumns_full_input_high_values(void)
{
int i;
unsigned char expected[] = {
142, 159, 1, 198,
77, 220, 1, 198,
161, 88, 1, 198,
188, 157, 1, 198};
unsigned char actual[] = {
219, 242, 1, 198,
19, 10, 1, 198,
83, 34, 1, 198,
69, 92, 1, 198};
MixColumns(actual);
for (i = 0; i < 4*4; i++)
{
CU_ASSERT_INT_EQ(expected[i], actual[i]);
}
}
void
AES_Cipher(void *_ctx, u1 *data)
{
char r;
AES_CTX *ctx = (AES_CTX *)_ctx;
u4 *w = ctx->W;
AddRoundKey((u4 *)data, w);
w += 4;
for(r = 1;r < ctx->Nr;r++) {
SubBytes(data);
ShiftRows(data);
MixColumns(data);
AddRoundKey((u4 *)data, w);
w += 4;
}
SubBytes(data);
ShiftRows(data);
AddRoundKey((u4 *)data, w);
}
///////////////////////////////////////////////////////////////////////////////
// 函数名： BlockDecrypt
// 描述： 对单块数据解密。
// 输入参数： pState -- 状态数据。
// 输出参数： pState -- 解密后的状态数据。
// 返回值： 无。
///////////////////////////////////////////////////////////////////////////////
static void BlockDecrypt(unsigned char *pState)
{
unsigned char i;
AddRoundKey(pState, &g_roundKeyTable[4*Nb*Nr]);
for (i = Nr; i > 0; i--) // i = [Nr, 1]
{
ShiftRows(pState, 1);
SubBytes(pState, 4*Nb, 1);
AddRoundKey(pState, &g_roundKeyTable[4*Nb*(i-1)]);
if (i != 1)
{
MixColumns(pState, 1);
}
}
// 为了节省代码，合并到循化执行
// ShiftRows(pState, 1);
// SubBytes(pState, 4*Nb, 1);
// AddRoundKey(pState, g_roundKeyTable);
}
/*
* One AES round
*/
void AES_round( word P, word K, word C)
{
int i,j;
unsigned char state[4][4];
// Convert the 16 byte sequence to a 4x4 matrix
for(i=0; i<4; i++)
for(j=0; j<4; j++)
state[i][j] = P[ 4 * j + i ];
// Apply keyless AES round
SubBytes ( state );
ShiftRows ( state );
MixColumns( state );
// Convert the 4x4 matrix to 16-byte sequence
for(i=0; i<4; i++)
for(j=0; j<4; j++)
C[ 4 * j + i ] = state[i][j];
// Xor the key
for(i=0; i<16; i++)
C[i] ^= K[i];
}
int main(int argc, char** argv){
print(state);
KeySchedule();
AddRoundKey();
for(iteracja = 1; iteracja < ROUND_cnt; ++iteracja){
SubBytes();
ShiftRows();
MixColumns();
print(state);
AddRoundKey();
}
SubBytes();
ShiftRows()
AddRoundKey();
print(state); /*encrypted*/
AddRoundKey();
InvShiftRows();
InvSubBytes();
for(iteracja = ROUND_cnt-1; iteracja > 0; --iteracja){
AddRoundKey();
InvMixColumns();
InvShiftRows();
InvSubBytes();
}
AddRoundKey();
print(state);
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// 函数名： BlockEncrypt
// 描述： 对单块数据加密。
// 输入参数： pState -- 状态数据。
// 输出参数： pState -- 加密后的状态数据。
// 返回值： 无。
///////////////////////////////////////////////////////////////////////////////
static void BlockEncrypt(unsigned char *pState)
{
unsigned char i;
AddRoundKey(pState, g_roundKeyTable);
for (i = 1; i <= Nr; i++) // i = [1, Nr]
{
SubBytes(pState, 4*Nb, 0);
ShiftRows(pState, 0);
if (i != Nr)
{
MixColumns(pState, 0);
}
AddRoundKey(pState, &g_roundKeyTable[4*Nb*i]);
}
// 为了节省代码，合并到循化执行
// SubBytes(pState, 4*Nb);
// ShiftRows(pState, 0);
// AddRoundKey(pState, &g_roundKeyTable[4*Nb*Nr]);
}
// La fonction cipher sert a chiffrer le bloc de message
void Cipher(unsigned char *C, unsigned char M[], unsigned char Key[], int Nr)
{
int i,j,round=0;
unsigned char T[16],U[16], V[16],W[16];
unsigned char RoundKey[240];
//On fabrique les clefs de ronde
KeyExpansion( RoundKey, Key, 10);
//On copide le messge dans le bloc d'etat
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
W[4*j+i] = M[4*j + i];
}
}
// for (i=0; i<4;i++) {
// for (j=16; j<24; j++) {
// if (!(j%4))
// printf(" ");
// printf("%02x ", RoundKey[j*4 + i]);
// }
// printf("\n");
// }
//printf("\n");
// AddKey de la premiere clef
AddRoundKey(T,W,RoundKey,0);
// Il y a Nr rondes.
// Les Nr-1 premieres rondes sont identiques
// Ces Nr-1 rondes sont effectuées dans la boucle for ci-dessous
for(round=1;round<Nr;round++)
{
SubBytes(U,T);
ShiftRows(V,U);
MixColumns(W,V);
AddRoundKey(T,W,RoundKey,round);
}
// Derniere ronde
// La fonction MixColumns n'est pas dans la derniere ronde
SubBytes(U,T);
ShiftRows(V,U);
AddRoundKey(W,V,RoundKey,Nr);
// Le processus de chiffremen est fini
// On copie le bloc d'etat du message dans le bloc de message chiffre
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
C[j*4+i]=W[4*j+i];
}
}
}
