renamed crypto -> ext

3 files changed, 0 insertions, 544 deletions

diff --git a/crypto/aes/Makefile b/crypto/aes/Makefile
deleted file mode 100644
index 463aed3..0000000
--- a/crypto/aes/Makefile
+++ /dev/null
@@ -1,15 +0,0 @@
-include common.mk
-
-obj = aes.o
-
-
-%.o: %.c %.h
-	$(CC) $(CFLAGS) -c $<
-
-%.o: %.S
-	$(CC) $(CFLAGS) -c $<
-
-all: $(obj)
-
-clean:
-	rm -f *.o
diff --git a/crypto/aes/aes.c b/crypto/aes/aes.c
deleted file mode 100644
index fc74d8d..0000000
--- a/crypto/aes/aes.c
+++ /dev/null
@@ -1,492 +0,0 @@
-/*
-
-This is an implementation of the AES algorithm, specifically ECB, CTR and CBC mode.
-Block size can be chosen in aes.h - available choices are AES128, AES192, AES256.
-
-The implementation is verified against the test vectors in:
-  National Institute of Standards and Technology Special Publication 800-38A 2001 ED
-
-ECB-AES128
-----------
-
-  plain-text:
-    6bc1bee22e409f96e93d7e117393172a
-    ae2d8a571e03ac9c9eb76fac45af8e51
-    30c81c46a35ce411e5fbc1191a0a52ef
-    f69f2445df4f9b17ad2b417be66c3710
-
-  key:
-    2b7e151628aed2a6abf7158809cf4f3c
-
-  resulting cipher
-    3ad77bb40d7a3660a89ecaf32466ef97
-    f5d3d58503b9699de785895a96fdbaaf
-    43b1cd7f598ece23881b00e3ed030688
-    7b0c785e27e8ad3f8223207104725dd4
-
-
-NOTE:   String length must be evenly divisible by 16byte (str_len % 16 == 0)
-        You should pad the end of the string with zeros if this is not the case.
-        For AES192/256 the key size is proportionally larger.
-
-*/
-
-
-/*****************************************************************************/
-/* Includes:                                                                 */
-/*****************************************************************************/
-#include <string.h> // CBC mode, for memset
-#include "aes.h"
-
-/*****************************************************************************/
-/* Defines:                                                                  */
-/*****************************************************************************/
-// The number of columns comprising a state in AES. This is a constant in AES. Value=4
-#define Nb 4
-
-#if defined(AES256) && (AES256 == 1)
-    #define Nk 8
-    #define Nr 14
-#elif defined(AES192) && (AES192 == 1)
-    #define Nk 6
-    #define Nr 12
-#else
-    #define Nk 4        // The number of 32 bit words in a key.
-    #define Nr 10       // The number of rounds in AES Cipher.
-#endif
-
-// jcallan@github points out that declaring Multiply as a function
-// reduces code size considerably with the Keil ARM compiler.
-// See this link for more information: https://github.com/kokke/tiny-AES-C/pull/3
-#ifndef MULTIPLY_AS_A_FUNCTION
-  #define MULTIPLY_AS_A_FUNCTION 0
-#endif
-
-
-
-
-/*****************************************************************************/
-/* Private variables:                                                        */
-/*****************************************************************************/
-// state - array holding the intermediate results during decryption.
-typedef uint8_t state_t[4][4];
-
-
-
-// The lookup-tables are marked const so they can be placed in read-only storage instead of RAM
-// The numbers below can be computed dynamically trading ROM for RAM -
-// This can be useful in (embedded) bootloader applications, where ROM is often limited.
-static const uint8_t sbox[256] = {
-  //0     1    2      3     4    5     6     7      8    9     A      B    C     D     E     F
-  0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
-  0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
-  0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
-  0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
-  0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
-  0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
-  0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
-  0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
-  0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
-  0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
-  0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
-  0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
-  0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
-  0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
-  0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
-  0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };
-
-static const uint8_t rsbox[256] = {
-  0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
-  0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
-  0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
-  0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
-  0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
-  0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
-  0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
-  0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
-  0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
-  0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
-  0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
-  0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
-  0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
-  0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
-  0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
-  0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };
-
-// The round constant word array, rcon[i], contains the values given by
-// x to the power (i-1) being powers of x (x is denoted as {02}) in the field GF(2^8)
-static const uint8_t rcon[11] = {
-  0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 };
-
-/*
- * Jordan Goulder points out in PR #12 (https://github.com/kokke/tiny-AES-C/pull/12),
- * that you can remove most of the elements in the rcon array, because they are unused.
- *
- * From Wikipedia's article on the Rijndael key schedule @ https://en.wikipedia.org/wiki/Rijndael_key_schedule#rcon
- *
- * "Only the first some of these constants are actually used – up to rcon[10] for AES-128 (as 11 round keys are needed),
- *  up to rcon[8] for AES-192, up to rcon[7] for AES-256. rcon[0] is not used in AES algorithm."
- */
-
-
-/*****************************************************************************/
-/* Private functions:                                                        */
-/*****************************************************************************/
-/*
-static uint8_t getSBoxValue(uint8_t num)
-{
-  return sbox[num];
-}
-*/
-#define getSBoxValue(num) (sbox[(num)])
-
-// This function produces Nb(Nr+1) round keys. The round keys are used in each round to decrypt the states.
-static void KeyExpansion(uint8_t* RoundKey, const uint8_t* Key)
-{
-  unsigned i, j, k;
-  uint8_t tempa[4]; // Used for the column/row operations
-
-  // The first round key is the key itself.
-  for (i = 0; i < Nk; ++i)
-  {
-    RoundKey[(i * 4) + 0] = Key[(i * 4) + 0];
-    RoundKey[(i * 4) + 1] = Key[(i * 4) + 1];
-    RoundKey[(i * 4) + 2] = Key[(i * 4) + 2];
-    RoundKey[(i * 4) + 3] = Key[(i * 4) + 3];
-  }
-
-  // All other round keys are found from the previous round keys.
-  for (i = Nk; i < Nb * (Nr + 1); ++i)
-  {
-    {
-      k = (i - 1) * 4;
-      tempa[0]=RoundKey[k + 0];
-      tempa[1]=RoundKey[k + 1];
-      tempa[2]=RoundKey[k + 2];
-      tempa[3]=RoundKey[k + 3];
-
-    }
-
-    if (i % Nk == 0)
-    {
-      // This function shifts the 4 bytes in a word to the left once.
-      // [a0,a1,a2,a3] becomes [a1,a2,a3,a0]
-
-      // Function RotWord()
-      {
-        const uint8_t u8tmp = tempa[0];
-        tempa[0] = tempa[1];
-        tempa[1] = tempa[2];
-        tempa[2] = tempa[3];
-        tempa[3] = u8tmp;
-      }
-
-      // SubWord() is a function that takes a four-byte input word and
-      // applies the S-box to each of the four bytes to produce an output word.
-
-      // Function Subword()
-      {
-        tempa[0] = getSBoxValue(tempa[0]);
-        tempa[1] = getSBoxValue(tempa[1]);
-        tempa[2] = getSBoxValue(tempa[2]);
-        tempa[3] = getSBoxValue(tempa[3]);
-      }
-
-      tempa[0] = tempa[0] ^ rcon[i/Nk];
-    }
-#if defined(AES256) && (AES256 == 1)
-    if (i % Nk == 4)
-    {
-      // Function Subword()
-      {
-        tempa[0] = getSBoxValue(tempa[0]);
-        tempa[1] = getSBoxValue(tempa[1]);
-        tempa[2] = getSBoxValue(tempa[2]);
-        tempa[3] = getSBoxValue(tempa[3]);
-      }
-    }
-#endif
-    j = i * 4; k=(i - Nk) * 4;
-    RoundKey[j + 0] = RoundKey[k + 0] ^ tempa[0];
-    RoundKey[j + 1] = RoundKey[k + 1] ^ tempa[1];
-    RoundKey[j + 2] = RoundKey[k + 2] ^ tempa[2];
-    RoundKey[j + 3] = RoundKey[k + 3] ^ tempa[3];
-  }
-}
-
-// This function adds the round key to state.
-// The round key is added to the state by an XOR function.
-static void AddRoundKey(uint8_t round, state_t* state, const uint8_t* RoundKey)
-{
-  uint8_t i,j;
-  for (i = 0; i < 4; ++i)
-  {
-    for (j = 0; j < 4; ++j)
-    {
-      (*state)[i][j] ^= RoundKey[(round * Nb * 4) + (i * Nb) + j];
-    }
-  }
-}
-
-// The SubBytes Function Substitutes the values in the
-// state matrix with values in an S-box.
-static void SubBytes(state_t* state)
-{
-  uint8_t i, j;
-  for (i = 0; i < 4; ++i)
-  {
-    for (j = 0; j < 4; ++j)
-    {
-      (*state)[j][i] = getSBoxValue((*state)[j][i]);
-    }
-  }
-}
-
-// The ShiftRows() function shifts the rows in the state to the left.
-// Each row is shifted with different offset.
-// Offset = Row number. So the first row is not shifted.
-static void ShiftRows(state_t* state)
-{
-  uint8_t temp;
-
-  // Rotate first row 1 columns to left
-  temp           = (*state)[0][1];
-  (*state)[0][1] = (*state)[1][1];
-  (*state)[1][1] = (*state)[2][1];
-  (*state)[2][1] = (*state)[3][1];
-  (*state)[3][1] = temp;
-
-  // Rotate second row 2 columns to left
-  temp           = (*state)[0][2];
-  (*state)[0][2] = (*state)[2][2];
-  (*state)[2][2] = temp;
-
-  temp           = (*state)[1][2];
-  (*state)[1][2] = (*state)[3][2];
-  (*state)[3][2] = temp;
-
-  // Rotate third row 3 columns to left
-  temp           = (*state)[0][3];
-  (*state)[0][3] = (*state)[3][3];
-  (*state)[3][3] = (*state)[2][3];
-  (*state)[2][3] = (*state)[1][3];
-  (*state)[1][3] = temp;
-}
-
-static uint8_t xtime(uint8_t x)
-{
-  return ((x<<1) ^ (((x>>7) & 1) * 0x1b));
-}
-
-// MixColumns function mixes the columns of the state matrix
-static void MixColumns(state_t* state)
-{
-  uint8_t i;
-  uint8_t Tmp, Tm, t;
-  for (i = 0; i < 4; ++i)
-  {
-    t   = (*state)[i][0];
-    Tmp = (*state)[i][0] ^ (*state)[i][1] ^ (*state)[i][2] ^ (*state)[i][3] ;
-    Tm  = (*state)[i][0] ^ (*state)[i][1] ; Tm = xtime(Tm);  (*state)[i][0] ^= Tm ^ Tmp ;
-    Tm  = (*state)[i][1] ^ (*state)[i][2] ; Tm = xtime(Tm);  (*state)[i][1] ^= Tm ^ Tmp ;
-    Tm  = (*state)[i][2] ^ (*state)[i][3] ; Tm = xtime(Tm);  (*state)[i][2] ^= Tm ^ Tmp ;
-    Tm  = (*state)[i][3] ^ t ;              Tm = xtime(Tm);  (*state)[i][3] ^= Tm ^ Tmp ;
-  }
-}
-
-// Multiply is used to multiply numbers in the field GF(2^8)
-// Note: The last call to xtime() is unneeded, but often ends up generating a smaller binary
-//       The compiler seems to be able to vectorize the operation better this way.
-//       See https://github.com/kokke/tiny-AES-c/pull/34
-#if MULTIPLY_AS_A_FUNCTION
-static uint8_t Multiply(uint8_t x, uint8_t y)
-{
-  return (((y & 1) * x) ^
-       ((y>>1 & 1) * xtime(x)) ^
-       ((y>>2 & 1) * xtime(xtime(x))) ^
-       ((y>>3 & 1) * xtime(xtime(xtime(x)))) ^
-       ((y>>4 & 1) * xtime(xtime(xtime(xtime(x)))))); /* this last call to xtime() can be omitted */
-  }
-#else
-#define Multiply(x, y)                                \
-      (  ((y & 1) * x) ^                              \
-      ((y>>1 & 1) * xtime(x)) ^                       \
-      ((y>>2 & 1) * xtime(xtime(x))) ^                \
-      ((y>>3 & 1) * xtime(xtime(xtime(x)))) ^         \
-      ((y>>4 & 1) * xtime(xtime(xtime(xtime(x))))))   \
-
-#endif
-
-/*
-static uint8_t getSBoxInvert(uint8_t num)
-{
-  return rsbox[num];
-}
-*/
-#define getSBoxInvert(num) (rsbox[(num)])
-
-// MixColumns function mixes the columns of the state matrix.
-// The method used to multiply may be difficult to understand for the inexperienced.
-// Please use the references to gain more information.
-static void InvMixColumns(state_t* state)
-{
-  int i;
-  uint8_t a, b, c, d;
-  for (i = 0; i < 4; ++i)
-  {
-    a = (*state)[i][0];
-    b = (*state)[i][1];
-    c = (*state)[i][2];
-    d = (*state)[i][3];
-
-    (*state)[i][0] = Multiply(a, 0x0e) ^ Multiply(b, 0x0b) ^ Multiply(c, 0x0d) ^ Multiply(d, 0x09);
-    (*state)[i][1] = Multiply(a, 0x09) ^ Multiply(b, 0x0e) ^ Multiply(c, 0x0b) ^ Multiply(d, 0x0d);
-    (*state)[i][2] = Multiply(a, 0x0d) ^ Multiply(b, 0x09) ^ Multiply(c, 0x0e) ^ Multiply(d, 0x0b);
-    (*state)[i][3] = Multiply(a, 0x0b) ^ Multiply(b, 0x0d) ^ Multiply(c, 0x09) ^ Multiply(d, 0x0e);
-  }
-}
-
-
-// The SubBytes Function Substitutes the values in the
-// state matrix with values in an S-box.
-static void InvSubBytes(state_t* state)
-{
-  uint8_t i, j;
-  for (i = 0; i < 4; ++i)
-  {
-    for (j = 0; j < 4; ++j)
-    {
-      (*state)[j][i] = getSBoxInvert((*state)[j][i]);
-    }
-  }
-}
-
-static void InvShiftRows(state_t* state)
-{
-  uint8_t temp;
-
-  // Rotate first row 1 columns to right
-  temp = (*state)[3][1];
-  (*state)[3][1] = (*state)[2][1];
-  (*state)[2][1] = (*state)[1][1];
-  (*state)[1][1] = (*state)[0][1];
-  (*state)[0][1] = temp;
-
-  // Rotate second row 2 columns to right
-  temp = (*state)[0][2];
-  (*state)[0][2] = (*state)[2][2];
-  (*state)[2][2] = temp;
-
-  temp = (*state)[1][2];
-  (*state)[1][2] = (*state)[3][2];
-  (*state)[3][2] = temp;
-
-  // Rotate third row 3 columns to right
-  temp = (*state)[0][3];
-  (*state)[0][3] = (*state)[1][3];
-  (*state)[1][3] = (*state)[2][3];
-  (*state)[2][3] = (*state)[3][3];
-  (*state)[3][3] = temp;
-}
-
-// Cipher is the main function that encrypts the PlainText.
-static void Cipher(state_t* state, const uint8_t* RoundKey)
-{
-  uint8_t round = 0;
-
-  // Add the First round key to the state before starting the rounds.
-  AddRoundKey(0, state, RoundKey);
-
-  // There will be Nr rounds.
-  // The first Nr-1 rounds are identical.
-  // These Nr rounds are executed in the loop below.
-  // Last one without MixColumns()
-  for (round = 1; ; ++round)
-  {
-    SubBytes(state);
-    ShiftRows(state);
-    if (round == Nr) {
-      break;
-    }
-    MixColumns(state);
-    AddRoundKey(round, state, RoundKey);
-  }
-  // Add round key to last round
-  AddRoundKey(Nr, state, RoundKey);
-}
-
-static void InvCipher(state_t* state, const uint8_t* RoundKey)
-{
-  uint8_t round = 0;
-
-  // Add the First round key to the state before starting the rounds.
-  AddRoundKey(Nr, state, RoundKey);
-
-  // There will be Nr rounds.
-  // The first Nr-1 rounds are identical.
-  // These Nr rounds are executed in the loop below.
-  // Last one without InvMixColumn()
-  for (round = (Nr - 1); ; --round)
-  {
-    InvShiftRows(state);
-    InvSubBytes(state);
-    AddRoundKey(round, state, RoundKey);
-    if (round == 0) {
-      break;
-    }
-    InvMixColumns(state);
-  }
-
-}
-
-static void XorBlock(uint8_t* buf, const uint8_t* block)
-{
-  uint8_t i;
-  for (i = 0; i < AES_BLOCKLEN; ++i) // The block in AES is always 128bit no matter the key size
-  {
-    buf[i] ^= block[i];
-  }
-}
-
-/*****************************************************************************/
-/* Public functions:                                                         */
-/*****************************************************************************/
-
-void aes_init(AESCtx *ctx, uint8_t *key) {
-  KeyExpansion(ctx->RoundKey, key);
-}
-
-void aes_ecb_encrypt(AESCtx *ctx, uint8_t *buf) {
-  Cipher((state_t*)buf, ctx->RoundKey);
-}
-
-void aes_ecb_decrypt(AESCtx *ctx, uint8_t *buf) {
-  InvCipher((state_t*)buf, ctx->RoundKey);
-}
-
-void aes_cbc_encrypt(AESCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length) {
-  size_t i;
-  uint8_t *block = iv;
-
-  for (i = 0; i < length; i += AES_BLOCKLEN) {
-    XorBlock(buf, block);
-    Cipher((state_t*)buf, ctx->RoundKey);
-    block = buf;
-    buf += AES_BLOCKLEN;
-  }
-}
-
-void aes_cbc_decrypt(AESCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length) {
-  size_t i;
-  uint8_t block[AES_BLOCKLEN];
-  uint8_t block_next[AES_BLOCKLEN];
-
-  memcpy(block, iv, AES_BLOCKLEN);
-  for (i = 0; i < length; i += AES_BLOCKLEN) {
-    memcpy(block_next, buf, AES_BLOCKLEN);
-    InvCipher((state_t*)buf, ctx->RoundKey);
-    XorBlock(buf, block);
-    memcpy(block, block_next, AES_BLOCKLEN);
-    buf += AES_BLOCKLEN;
-  }
-}
diff --git a/crypto/aes/aes.h b/crypto/aes/aes.h
deleted file mode 100644
index f6dd079..0000000
--- a/crypto/aes/aes.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef _AES_H_
-#define _AES_H_
-
-#include <stdint.h>
-#include <stddef.h>
-
-#define AES128 1
-//#define AES192 1
-//#define AES256 1
-
-#define AES_BLOCKLEN 16 // Block length in bytes - AES is 128b block only
-
-#if defined(AES256) && (AES256 == 1)
-    #define AES_KEYLEN 32
-    #define AES_KEYEXPSIZE 240
-#elif defined(AES192) && (AES192 == 1)
-    #define AES_KEYLEN 24
-    #define AES_KEYEXPSIZE 208
-#else
-    #define AES_KEYLEN 16   // Key length in bytes
-    #define AES_KEYEXPSIZE 176
-#endif
-
-typedef struct
-{
-  uint8_t RoundKey[AES_KEYEXPSIZE];
-} AESCtx;
-
-void aes_init(AESCtx *ctx, uint8_t *key);
-// buffer size is exactly AES_BLOCKLEN bytes;
-void aes_ecb_encrypt(AESCtx *ctx, uint8_t *buf);
-void aes_ecb_decrypt(AESCtx *ctx, uint8_t *buf);
-// buffer size MUST be mutile of AES_BLOCKLEN;
-void aes_cbc_encrypt(AESCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length);
-void aes_cbc_decrypt(AESCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length);
-
-#endif
\ No newline at end of file