fat filesystem with disk encryption for sd card driver

6 files changed, 1444 insertions, 0 deletions

diff --git a/crypto/aes/aes.c b/crypto/aes/aes.c
new file mode 100644
index 0000000..fc74d8d
--- /dev/null
+++ b/crypto/aes/aes.c
@@ -0,0 +1,492 @@
+/*
+
+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
new file mode 100644
index 0000000..f6dd079
--- /dev/null
+++ b/crypto/aes/aes.h
@@ -0,0 +1,37 @@
+#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
diff --git a/crypto/blowfish/blowfish.c b/crypto/blowfish/blowfish.c
new file mode 100644
index 0000000..ada71d3
--- /dev/null
+++ b/crypto/blowfish/blowfish.c
@@ -0,0 +1,539 @@
+/*

+blowfish.c:  C implementation of the Blowfish algorithm.

+

+Copyright (C) 1997 by Paul Kocher

+

+This library is free software; you can redistribute it and/or

+modify it under the terms of the GNU Lesser General Public

+License as published by the Free Software Foundation; either

+version 2.1 of the License, or (at your option) any later version.

+This library is distributed in the hope that it will be useful,

+but WITHOUT ANY WARRANTY; without even the implied warranty of

+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

+Lesser General Public License for more details.

+You should have received a copy of the GNU Lesser General Public

+License along with this library; if not, write to the Free Software

+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

+

+

+

+

+COMMENTS ON USING THIS CODE:

+

+Normal usage is as follows:

+   [1] Allocate a BFCtx.  (It may be too big for the stack.)

+   [2] Call Blowfish_Init with a pointer to your BFCtx, a pointer to

+       the key, and the number of bytes in the key.

+   [3] To encrypt a 64-bit block, call Blowfish_Encrypt with a pointer to

+       BFCtx, a pointer to the 32-bit left half of the plaintext

+	   and a pointer to the 32-bit right half.  The plaintext will be

+	   overwritten with the ciphertext.

+   [4] Decryption is the same as encryption except that the plaintext and

+       ciphertext are reversed.

+

+Warning #1:  The code does not check key lengths. (Caveat encryptor.)

+Warning #2:  Beware that Blowfish keys repeat such that "ab" = "abab".

+Warning #3:  It is normally a good idea to zeroize the BFCtx before

+  freeing it.

+Warning #4:  Endianness conversions are the responsibility of the caller.

+  (To encrypt bytes on a little-endian platforms, you'll probably want

+  to swap bytes around instead of just casting.)

+Warning #5:  Make sure to use a reasonable mode of operation for your

+  application.  (If you don't know what CBC mode is, see Warning #7.)

+Warning #6:  This code is susceptible to timing attacks.

+Warning #7:  Security engineering is risky and non-intuitive.  Have someone

+  check your work.  If you don't know what you are doing, get help.

+

+

+This is code is fast enough for most applications, but is not optimized for

+speed.

+

+If you require this code under a license other than LGPL, please ask.  (I

+can be located using your favorite search engine.)  Unfortunately, I do not

+have time to provide unpaid support for everyone who uses this code.

+

+                                             -- Paul Kocher

+*/

+

+#include <string.h>

+#include "blowfish.h"

+

+#define N               16

+

+static const unsigned long ORIG_P[16 + 2] = {

+        0x243F6A88L, 0x85A308D3L, 0x13198A2EL, 0x03707344L,

+        0xA4093822L, 0x299F31D0L, 0x082EFA98L, 0xEC4E6C89L,

+        0x452821E6L, 0x38D01377L, 0xBE5466CFL, 0x34E90C6CL,

+        0xC0AC29B7L, 0xC97C50DDL, 0x3F84D5B5L, 0xB5470917L,

+        0x9216D5D9L, 0x8979FB1BL

+};

+

+static const unsigned long ORIG_S[4][256] = {

+    {   0xD1310BA6L, 0x98DFB5ACL, 0x2FFD72DBL, 0xD01ADFB7L,

+        0xB8E1AFEDL, 0x6A267E96L, 0xBA7C9045L, 0xF12C7F99L,

+        0x24A19947L, 0xB3916CF7L, 0x0801F2E2L, 0x858EFC16L,

+        0x636920D8L, 0x71574E69L, 0xA458FEA3L, 0xF4933D7EL,

+        0x0D95748FL, 0x728EB658L, 0x718BCD58L, 0x82154AEEL,

+        0x7B54A41DL, 0xC25A59B5L, 0x9C30D539L, 0x2AF26013L,

+        0xC5D1B023L, 0x286085F0L, 0xCA417918L, 0xB8DB38EFL,

+        0x8E79DCB0L, 0x603A180EL, 0x6C9E0E8BL, 0xB01E8A3EL,

+        0xD71577C1L, 0xBD314B27L, 0x78AF2FDAL, 0x55605C60L,

+        0xE65525F3L, 0xAA55AB94L, 0x57489862L, 0x63E81440L,

+        0x55CA396AL, 0x2AAB10B6L, 0xB4CC5C34L, 0x1141E8CEL,

+        0xA15486AFL, 0x7C72E993L, 0xB3EE1411L, 0x636FBC2AL,

+        0x2BA9C55DL, 0x741831F6L, 0xCE5C3E16L, 0x9B87931EL,

+        0xAFD6BA33L, 0x6C24CF5CL, 0x7A325381L, 0x28958677L,

+        0x3B8F4898L, 0x6B4BB9AFL, 0xC4BFE81BL, 0x66282193L,

+        0x61D809CCL, 0xFB21A991L, 0x487CAC60L, 0x5DEC8032L,

+        0xEF845D5DL, 0xE98575B1L, 0xDC262302L, 0xEB651B88L,

+        0x23893E81L, 0xD396ACC5L, 0x0F6D6FF3L, 0x83F44239L,

+        0x2E0B4482L, 0xA4842004L, 0x69C8F04AL, 0x9E1F9B5EL,

+        0x21C66842L, 0xF6E96C9AL, 0x670C9C61L, 0xABD388F0L,

+        0x6A51A0D2L, 0xD8542F68L, 0x960FA728L, 0xAB5133A3L,

+        0x6EEF0B6CL, 0x137A3BE4L, 0xBA3BF050L, 0x7EFB2A98L,

+        0xA1F1651DL, 0x39AF0176L, 0x66CA593EL, 0x82430E88L,

+        0x8CEE8619L, 0x456F9FB4L, 0x7D84A5C3L, 0x3B8B5EBEL,

+        0xE06F75D8L, 0x85C12073L, 0x401A449FL, 0x56C16AA6L,

+        0x4ED3AA62L, 0x363F7706L, 0x1BFEDF72L, 0x429B023DL,

+        0x37D0D724L, 0xD00A1248L, 0xDB0FEAD3L, 0x49F1C09BL,

+        0x075372C9L, 0x80991B7BL, 0x25D479D8L, 0xF6E8DEF7L,

+        0xE3FE501AL, 0xB6794C3BL, 0x976CE0BDL, 0x04C006BAL,

+        0xC1A94FB6L, 0x409F60C4L, 0x5E5C9EC2L, 0x196A2463L,

+        0x68FB6FAFL, 0x3E6C53B5L, 0x1339B2EBL, 0x3B52EC6FL,

+        0x6DFC511FL, 0x9B30952CL, 0xCC814544L, 0xAF5EBD09L,

+        0xBEE3D004L, 0xDE334AFDL, 0x660F2807L, 0x192E4BB3L,

+        0xC0CBA857L, 0x45C8740FL, 0xD20B5F39L, 0xB9D3FBDBL,

+        0x5579C0BDL, 0x1A60320AL, 0xD6A100C6L, 0x402C7279L,

+        0x679F25FEL, 0xFB1FA3CCL, 0x8EA5E9F8L, 0xDB3222F8L,

+        0x3C7516DFL, 0xFD616B15L, 0x2F501EC8L, 0xAD0552ABL,

+        0x323DB5FAL, 0xFD238760L, 0x53317B48L, 0x3E00DF82L,

+        0x9E5C57BBL, 0xCA6F8CA0L, 0x1A87562EL, 0xDF1769DBL,

+        0xD542A8F6L, 0x287EFFC3L, 0xAC6732C6L, 0x8C4F5573L,

+        0x695B27B0L, 0xBBCA58C8L, 0xE1FFA35DL, 0xB8F011A0L,

+        0x10FA3D98L, 0xFD2183B8L, 0x4AFCB56CL, 0x2DD1D35BL,

+        0x9A53E479L, 0xB6F84565L, 0xD28E49BCL, 0x4BFB9790L,

+        0xE1DDF2DAL, 0xA4CB7E33L, 0x62FB1341L, 0xCEE4C6E8L,

+        0xEF20CADAL, 0x36774C01L, 0xD07E9EFEL, 0x2BF11FB4L,

+        0x95DBDA4DL, 0xAE909198L, 0xEAAD8E71L, 0x6B93D5A0L,

+        0xD08ED1D0L, 0xAFC725E0L, 0x8E3C5B2FL, 0x8E7594B7L,

+        0x8FF6E2FBL, 0xF2122B64L, 0x8888B812L, 0x900DF01CL,

+        0x4FAD5EA0L, 0x688FC31CL, 0xD1CFF191L, 0xB3A8C1ADL,

+        0x2F2F2218L, 0xBE0E1777L, 0xEA752DFEL, 0x8B021FA1L,

+        0xE5A0CC0FL, 0xB56F74E8L, 0x18ACF3D6L, 0xCE89E299L,

+        0xB4A84FE0L, 0xFD13E0B7L, 0x7CC43B81L, 0xD2ADA8D9L,

+        0x165FA266L, 0x80957705L, 0x93CC7314L, 0x211A1477L,

+        0xE6AD2065L, 0x77B5FA86L, 0xC75442F5L, 0xFB9D35CFL,

+        0xEBCDAF0CL, 0x7B3E89A0L, 0xD6411BD3L, 0xAE1E7E49L,

+        0x00250E2DL, 0x2071B35EL, 0x226800BBL, 0x57B8E0AFL,

+        0x2464369BL, 0xF009B91EL, 0x5563911DL, 0x59DFA6AAL,

+        0x78C14389L, 0xD95A537FL, 0x207D5BA2L, 0x02E5B9C5L,

+        0x83260376L, 0x6295CFA9L, 0x11C81968L, 0x4E734A41L,

+        0xB3472DCAL, 0x7B14A94AL, 0x1B510052L, 0x9A532915L,

+        0xD60F573FL, 0xBC9BC6E4L, 0x2B60A476L, 0x81E67400L,

+        0x08BA6FB5L, 0x571BE91FL, 0xF296EC6BL, 0x2A0DD915L,

+        0xB6636521L, 0xE7B9F9B6L, 0xFF34052EL, 0xC5855664L,

+        0x53B02D5DL, 0xA99F8FA1L, 0x08BA4799L, 0x6E85076AL   },

+    {   0x4B7A70E9L, 0xB5B32944L, 0xDB75092EL, 0xC4192623L,

+        0xAD6EA6B0L, 0x49A7DF7DL, 0x9CEE60B8L, 0x8FEDB266L,

+        0xECAA8C71L, 0x699A17FFL, 0x5664526CL, 0xC2B19EE1L,

+        0x193602A5L, 0x75094C29L, 0xA0591340L, 0xE4183A3EL,

+        0x3F54989AL, 0x5B429D65L, 0x6B8FE4D6L, 0x99F73FD6L,

+        0xA1D29C07L, 0xEFE830F5L, 0x4D2D38E6L, 0xF0255DC1L,

+        0x4CDD2086L, 0x8470EB26L, 0x6382E9C6L, 0x021ECC5EL,

+        0x09686B3FL, 0x3EBAEFC9L, 0x3C971814L, 0x6B6A70A1L,

+        0x687F3584L, 0x52A0E286L, 0xB79C5305L, 0xAA500737L,

+        0x3E07841CL, 0x7FDEAE5CL, 0x8E7D44ECL, 0x5716F2B8L,

+        0xB03ADA37L, 0xF0500C0DL, 0xF01C1F04L, 0x0200B3FFL,

+        0xAE0CF51AL, 0x3CB574B2L, 0x25837A58L, 0xDC0921BDL,

+        0xD19113F9L, 0x7CA92FF6L, 0x94324773L, 0x22F54701L,

+        0x3AE5E581L, 0x37C2DADCL, 0xC8B57634L, 0x9AF3DDA7L,

+        0xA9446146L, 0x0FD0030EL, 0xECC8C73EL, 0xA4751E41L,

+        0xE238CD99L, 0x3BEA0E2FL, 0x3280BBA1L, 0x183EB331L,

+        0x4E548B38L, 0x4F6DB908L, 0x6F420D03L, 0xF60A04BFL,

+        0x2CB81290L, 0x24977C79L, 0x5679B072L, 0xBCAF89AFL,

+        0xDE9A771FL, 0xD9930810L, 0xB38BAE12L, 0xDCCF3F2EL,

+        0x5512721FL, 0x2E6B7124L, 0x501ADDE6L, 0x9F84CD87L,

+        0x7A584718L, 0x7408DA17L, 0xBC9F9ABCL, 0xE94B7D8CL,

+        0xEC7AEC3AL, 0xDB851DFAL, 0x63094366L, 0xC464C3D2L,

+        0xEF1C1847L, 0x3215D908L, 0xDD433B37L, 0x24C2BA16L,

+        0x12A14D43L, 0x2A65C451L, 0x50940002L, 0x133AE4DDL,

+        0x71DFF89EL, 0x10314E55L, 0x81AC77D6L, 0x5F11199BL,

+        0x043556F1L, 0xD7A3C76BL, 0x3C11183BL, 0x5924A509L,

+        0xF28FE6EDL, 0x97F1FBFAL, 0x9EBABF2CL, 0x1E153C6EL,

+        0x86E34570L, 0xEAE96FB1L, 0x860E5E0AL, 0x5A3E2AB3L,

+        0x771FE71CL, 0x4E3D06FAL, 0x2965DCB9L, 0x99E71D0FL,

+        0x803E89D6L, 0x5266C825L, 0x2E4CC978L, 0x9C10B36AL,

+        0xC6150EBAL, 0x94E2EA78L, 0xA5FC3C53L, 0x1E0A2DF4L,

+        0xF2F74EA7L, 0x361D2B3DL, 0x1939260FL, 0x19C27960L,

+        0x5223A708L, 0xF71312B6L, 0xEBADFE6EL, 0xEAC31F66L,

+        0xE3BC4595L, 0xA67BC883L, 0xB17F37D1L, 0x018CFF28L,

+        0xC332DDEFL, 0xBE6C5AA5L, 0x65582185L, 0x68AB9802L,

+        0xEECEA50FL, 0xDB2F953BL, 0x2AEF7DADL, 0x5B6E2F84L,

+        0x1521B628L, 0x29076170L, 0xECDD4775L, 0x619F1510L,

+        0x13CCA830L, 0xEB61BD96L, 0x0334FE1EL, 0xAA0363CFL,

+        0xB5735C90L, 0x4C70A239L, 0xD59E9E0BL, 0xCBAADE14L,

+        0xEECC86BCL, 0x60622CA7L, 0x9CAB5CABL, 0xB2F3846EL,

+        0x648B1EAFL, 0x19BDF0CAL, 0xA02369B9L, 0x655ABB50L,

+        0x40685A32L, 0x3C2AB4B3L, 0x319EE9D5L, 0xC021B8F7L,

+        0x9B540B19L, 0x875FA099L, 0x95F7997EL, 0x623D7DA8L,

+        0xF837889AL, 0x97E32D77L, 0x11ED935FL, 0x16681281L,

+        0x0E358829L, 0xC7E61FD6L, 0x96DEDFA1L, 0x7858BA99L,

+        0x57F584A5L, 0x1B227263L, 0x9B83C3FFL, 0x1AC24696L,

+        0xCDB30AEBL, 0x532E3054L, 0x8FD948E4L, 0x6DBC3128L,

+        0x58EBF2EFL, 0x34C6FFEAL, 0xFE28ED61L, 0xEE7C3C73L,

+        0x5D4A14D9L, 0xE864B7E3L, 0x42105D14L, 0x203E13E0L,

+        0x45EEE2B6L, 0xA3AAABEAL, 0xDB6C4F15L, 0xFACB4FD0L,

+        0xC742F442L, 0xEF6ABBB5L, 0x654F3B1DL, 0x41CD2105L,

+        0xD81E799EL, 0x86854DC7L, 0xE44B476AL, 0x3D816250L,

+        0xCF62A1F2L, 0x5B8D2646L, 0xFC8883A0L, 0xC1C7B6A3L,

+        0x7F1524C3L, 0x69CB7492L, 0x47848A0BL, 0x5692B285L,

+        0x095BBF00L, 0xAD19489DL, 0x1462B174L, 0x23820E00L,

+        0x58428D2AL, 0x0C55F5EAL, 0x1DADF43EL, 0x233F7061L,

+        0x3372F092L, 0x8D937E41L, 0xD65FECF1L, 0x6C223BDBL,

+        0x7CDE3759L, 0xCBEE7460L, 0x4085F2A7L, 0xCE77326EL,

+        0xA6078084L, 0x19F8509EL, 0xE8EFD855L, 0x61D99735L,

+        0xA969A7AAL, 0xC50C06C2L, 0x5A04ABFCL, 0x800BCADCL,

+        0x9E447A2EL, 0xC3453484L, 0xFDD56705L, 0x0E1E9EC9L,

+        0xDB73DBD3L, 0x105588CDL, 0x675FDA79L, 0xE3674340L,

+        0xC5C43465L, 0x713E38D8L, 0x3D28F89EL, 0xF16DFF20L,

+        0x153E21E7L, 0x8FB03D4AL, 0xE6E39F2BL, 0xDB83ADF7L   },

+    {   0xE93D5A68L, 0x948140F7L, 0xF64C261CL, 0x94692934L,

+        0x411520F7L, 0x7602D4F7L, 0xBCF46B2EL, 0xD4A20068L,

+        0xD4082471L, 0x3320F46AL, 0x43B7D4B7L, 0x500061AFL,

+        0x1E39F62EL, 0x97244546L, 0x14214F74L, 0xBF8B8840L,

+        0x4D95FC1DL, 0x96B591AFL, 0x70F4DDD3L, 0x66A02F45L,

+        0xBFBC09ECL, 0x03BD9785L, 0x7FAC6DD0L, 0x31CB8504L,

+        0x96EB27B3L, 0x55FD3941L, 0xDA2547E6L, 0xABCA0A9AL,

+        0x28507825L, 0x530429F4L, 0x0A2C86DAL, 0xE9B66DFBL,

+        0x68DC1462L, 0xD7486900L, 0x680EC0A4L, 0x27A18DEEL,

+        0x4F3FFEA2L, 0xE887AD8CL, 0xB58CE006L, 0x7AF4D6B6L,

+        0xAACE1E7CL, 0xD3375FECL, 0xCE78A399L, 0x406B2A42L,

+        0x20FE9E35L, 0xD9F385B9L, 0xEE39D7ABL, 0x3B124E8BL,

+        0x1DC9FAF7L, 0x4B6D1856L, 0x26A36631L, 0xEAE397B2L,

+        0x3A6EFA74L, 0xDD5B4332L, 0x6841E7F7L, 0xCA7820FBL,

+        0xFB0AF54EL, 0xD8FEB397L, 0x454056ACL, 0xBA489527L,

+        0x55533A3AL, 0x20838D87L, 0xFE6BA9B7L, 0xD096954BL,

+        0x55A867BCL, 0xA1159A58L, 0xCCA92963L, 0x99E1DB33L,

+        0xA62A4A56L, 0x3F3125F9L, 0x5EF47E1CL, 0x9029317CL,

+        0xFDF8E802L, 0x04272F70L, 0x80BB155CL, 0x05282CE3L,

+        0x95C11548L, 0xE4C66D22L, 0x48C1133FL, 0xC70F86DCL,

+        0x07F9C9EEL, 0x41041F0FL, 0x404779A4L, 0x5D886E17L,

+        0x325F51EBL, 0xD59BC0D1L, 0xF2BCC18FL, 0x41113564L,

+        0x257B7834L, 0x602A9C60L, 0xDFF8E8A3L, 0x1F636C1BL,

+        0x0E12B4C2L, 0x02E1329EL, 0xAF664FD1L, 0xCAD18115L,

+        0x6B2395E0L, 0x333E92E1L, 0x3B240B62L, 0xEEBEB922L,

+        0x85B2A20EL, 0xE6BA0D99L, 0xDE720C8CL, 0x2DA2F728L,

+        0xD0127845L, 0x95B794FDL, 0x647D0862L, 0xE7CCF5F0L,

+        0x5449A36FL, 0x877D48FAL, 0xC39DFD27L, 0xF33E8D1EL,

+        0x0A476341L, 0x992EFF74L, 0x3A6F6EABL, 0xF4F8FD37L,

+        0xA812DC60L, 0xA1EBDDF8L, 0x991BE14CL, 0xDB6E6B0DL,

+        0xC67B5510L, 0x6D672C37L, 0x2765D43BL, 0xDCD0E804L,

+        0xF1290DC7L, 0xCC00FFA3L, 0xB5390F92L, 0x690FED0BL,

+        0x667B9FFBL, 0xCEDB7D9CL, 0xA091CF0BL, 0xD9155EA3L,

+        0xBB132F88L, 0x515BAD24L, 0x7B9479BFL, 0x763BD6EBL,

+        0x37392EB3L, 0xCC115979L, 0x8026E297L, 0xF42E312DL,

+        0x6842ADA7L, 0xC66A2B3BL, 0x12754CCCL, 0x782EF11CL,

+        0x6A124237L, 0xB79251E7L, 0x06A1BBE6L, 0x4BFB6350L,

+        0x1A6B1018L, 0x11CAEDFAL, 0x3D25BDD8L, 0xE2E1C3C9L,

+        0x44421659L, 0x0A121386L, 0xD90CEC6EL, 0xD5ABEA2AL,

+        0x64AF674EL, 0xDA86A85FL, 0xBEBFE988L, 0x64E4C3FEL,

+        0x9DBC8057L, 0xF0F7C086L, 0x60787BF8L, 0x6003604DL,

+        0xD1FD8346L, 0xF6381FB0L, 0x7745AE04L, 0xD736FCCCL,

+        0x83426B33L, 0xF01EAB71L, 0xB0804187L, 0x3C005E5FL,

+        0x77A057BEL, 0xBDE8AE24L, 0x55464299L, 0xBF582E61L,

+        0x4E58F48FL, 0xF2DDFDA2L, 0xF474EF38L, 0x8789BDC2L,

+        0x5366F9C3L, 0xC8B38E74L, 0xB475F255L, 0x46FCD9B9L,

+        0x7AEB2661L, 0x8B1DDF84L, 0x846A0E79L, 0x915F95E2L,

+        0x466E598EL, 0x20B45770L, 0x8CD55591L, 0xC902DE4CL,

+        0xB90BACE1L, 0xBB8205D0L, 0x11A86248L, 0x7574A99EL,

+        0xB77F19B6L, 0xE0A9DC09L, 0x662D09A1L, 0xC4324633L,

+        0xE85A1F02L, 0x09F0BE8CL, 0x4A99A025L, 0x1D6EFE10L,

+        0x1AB93D1DL, 0x0BA5A4DFL, 0xA186F20FL, 0x2868F169L,

+        0xDCB7DA83L, 0x573906FEL, 0xA1E2CE9BL, 0x4FCD7F52L,

+        0x50115E01L, 0xA70683FAL, 0xA002B5C4L, 0x0DE6D027L,

+        0x9AF88C27L, 0x773F8641L, 0xC3604C06L, 0x61A806B5L,

+        0xF0177A28L, 0xC0F586E0L, 0x006058AAL, 0x30DC7D62L,

+        0x11E69ED7L, 0x2338EA63L, 0x53C2DD94L, 0xC2C21634L,

+        0xBBCBEE56L, 0x90BCB6DEL, 0xEBFC7DA1L, 0xCE591D76L,

+        0x6F05E409L, 0x4B7C0188L, 0x39720A3DL, 0x7C927C24L,

+        0x86E3725FL, 0x724D9DB9L, 0x1AC15BB4L, 0xD39EB8FCL,

+        0xED545578L, 0x08FCA5B5L, 0xD83D7CD3L, 0x4DAD0FC4L,

+        0x1E50EF5EL, 0xB161E6F8L, 0xA28514D9L, 0x6C51133CL,

+        0x6FD5C7E7L, 0x56E14EC4L, 0x362ABFCEL, 0xDDC6C837L,

+        0xD79A3234L, 0x92638212L, 0x670EFA8EL, 0x406000E0L  },

+    {   0x3A39CE37L, 0xD3FAF5CFL, 0xABC27737L, 0x5AC52D1BL,

+        0x5CB0679EL, 0x4FA33742L, 0xD3822740L, 0x99BC9BBEL,

+        0xD5118E9DL, 0xBF0F7315L, 0xD62D1C7EL, 0xC700C47BL,

+        0xB78C1B6BL, 0x21A19045L, 0xB26EB1BEL, 0x6A366EB4L,

+        0x5748AB2FL, 0xBC946E79L, 0xC6A376D2L, 0x6549C2C8L,

+        0x530FF8EEL, 0x468DDE7DL, 0xD5730A1DL, 0x4CD04DC6L,

+        0x2939BBDBL, 0xA9BA4650L, 0xAC9526E8L, 0xBE5EE304L,

+        0xA1FAD5F0L, 0x6A2D519AL, 0x63EF8CE2L, 0x9A86EE22L,

+        0xC089C2B8L, 0x43242EF6L, 0xA51E03AAL, 0x9CF2D0A4L,

+        0x83C061BAL, 0x9BE96A4DL, 0x8FE51550L, 0xBA645BD6L,

+        0x2826A2F9L, 0xA73A3AE1L, 0x4BA99586L, 0xEF5562E9L,

+        0xC72FEFD3L, 0xF752F7DAL, 0x3F046F69L, 0x77FA0A59L,

+        0x80E4A915L, 0x87B08601L, 0x9B09E6ADL, 0x3B3EE593L,

+        0xE990FD5AL, 0x9E34D797L, 0x2CF0B7D9L, 0x022B8B51L,

+        0x96D5AC3AL, 0x017DA67DL, 0xD1CF3ED6L, 0x7C7D2D28L,

+        0x1F9F25CFL, 0xADF2B89BL, 0x5AD6B472L, 0x5A88F54CL,

+        0xE029AC71L, 0xE019A5E6L, 0x47B0ACFDL, 0xED93FA9BL,

+        0xE8D3C48DL, 0x283B57CCL, 0xF8D56629L, 0x79132E28L,

+        0x785F0191L, 0xED756055L, 0xF7960E44L, 0xE3D35E8CL,

+        0x15056DD4L, 0x88F46DBAL, 0x03A16125L, 0x0564F0BDL,

+        0xC3EB9E15L, 0x3C9057A2L, 0x97271AECL, 0xA93A072AL,

+        0x1B3F6D9BL, 0x1E6321F5L, 0xF59C66FBL, 0x26DCF319L,

+        0x7533D928L, 0xB155FDF5L, 0x03563482L, 0x8ABA3CBBL,

+        0x28517711L, 0xC20AD9F8L, 0xABCC5167L, 0xCCAD925FL,

+        0x4DE81751L, 0x3830DC8EL, 0x379D5862L, 0x9320F991L,

+        0xEA7A90C2L, 0xFB3E7BCEL, 0x5121CE64L, 0x774FBE32L,

+        0xA8B6E37EL, 0xC3293D46L, 0x48DE5369L, 0x6413E680L,

+        0xA2AE0810L, 0xDD6DB224L, 0x69852DFDL, 0x09072166L,

+        0xB39A460AL, 0x6445C0DDL, 0x586CDECFL, 0x1C20C8AEL,

+        0x5BBEF7DDL, 0x1B588D40L, 0xCCD2017FL, 0x6BB4E3BBL,

+        0xDDA26A7EL, 0x3A59FF45L, 0x3E350A44L, 0xBCB4CDD5L,

+        0x72EACEA8L, 0xFA6484BBL, 0x8D6612AEL, 0xBF3C6F47L,

+        0xD29BE463L, 0x542F5D9EL, 0xAEC2771BL, 0xF64E6370L,

+        0x740E0D8DL, 0xE75B1357L, 0xF8721671L, 0xAF537D5DL,

+        0x4040CB08L, 0x4EB4E2CCL, 0x34D2466AL, 0x0115AF84L,

+        0xE1B00428L, 0x95983A1DL, 0x06B89FB4L, 0xCE6EA048L,

+        0x6F3F3B82L, 0x3520AB82L, 0x011A1D4BL, 0x277227F8L,

+        0x611560B1L, 0xE7933FDCL, 0xBB3A792BL, 0x344525BDL,

+        0xA08839E1L, 0x51CE794BL, 0x2F32C9B7L, 0xA01FBAC9L,

+        0xE01CC87EL, 0xBCC7D1F6L, 0xCF0111C3L, 0xA1E8AAC7L,

+        0x1A908749L, 0xD44FBD9AL, 0xD0DADECBL, 0xD50ADA38L,

+        0x0339C32AL, 0xC6913667L, 0x8DF9317CL, 0xE0B12B4FL,

+        0xF79E59B7L, 0x43F5BB3AL, 0xF2D519FFL, 0x27D9459CL,

+        0xBF97222CL, 0x15E6FC2AL, 0x0F91FC71L, 0x9B941525L,

+        0xFAE59361L, 0xCEB69CEBL, 0xC2A86459L, 0x12BAA8D1L,

+        0xB6C1075EL, 0xE3056A0CL, 0x10D25065L, 0xCB03A442L,

+        0xE0EC6E0EL, 0x1698DB3BL, 0x4C98A0BEL, 0x3278E964L,

+        0x9F1F9532L, 0xE0D392DFL, 0xD3A0342BL, 0x8971F21EL,

+        0x1B0A7441L, 0x4BA3348CL, 0xC5BE7120L, 0xC37632D8L,

+        0xDF359F8DL, 0x9B992F2EL, 0xE60B6F47L, 0x0FE3F11DL,

+        0xE54CDA54L, 0x1EDAD891L, 0xCE6279CFL, 0xCD3E7E6FL,

+        0x1618B166L, 0xFD2C1D05L, 0x848FD2C5L, 0xF6FB2299L,

+        0xF523F357L, 0xA6327623L, 0x93A83531L, 0x56CCCD02L,

+        0xACF08162L, 0x5A75EBB5L, 0x6E163697L, 0x88D273CCL,

+        0xDE966292L, 0x81B949D0L, 0x4C50901BL, 0x71C65614L,

+        0xE6C6C7BDL, 0x327A140AL, 0x45E1D006L, 0xC3F27B9AL,

+        0xC9AA53FDL, 0x62A80F00L, 0xBB25BFE2L, 0x35BDD2F6L,

+        0x71126905L, 0xB2040222L, 0xB6CBCF7CL, 0xCD769C2BL,

+        0x53113EC0L, 0x1640E3D3L, 0x38ABBD60L, 0x2547ADF0L,

+        0xBA38209CL, 0xF746CE76L, 0x77AFA1C5L, 0x20756060L,

+        0x85CBFE4EL, 0x8AE88DD8L, 0x7AAAF9B0L, 0x4CF9AA7EL,

+        0x1948C25CL, 0x02FB8A8CL, 0x01C36AE4L, 0xD6EBE1F9L,

+        0x90D4F869L, 0xA65CDEA0L, 0x3F09252DL, 0xC208E69FL,

+        0xB74E6132L, 0xCE77E25BL, 0x578FDFE3L, 0x3AC372E6L  }

+};

+

+

+static unsigned long F(BFCtx *ctx, unsigned long x) {

+   unsigned short a, b, c, d;

+   unsigned long  y;

+

+   d = (unsigned short)(x & 0xFF);

+   x >>= 8;

+   c = (unsigned short)(x & 0xFF);

+   x >>= 8;

+   b = (unsigned short)(x & 0xFF);

+   x >>= 8;

+   a = (unsigned short)(x & 0xFF);

+   y = ctx->S[0][a] + ctx->S[1][b];

+   y = y ^ ctx->S[2][c];

+   y = y + ctx->S[3][d];

+

+   return y;

+}

+

+

+static void Blowfish_Encrypt(BFCtx *ctx, unsigned long *xl, unsigned long *xr) {

+  unsigned long  Xl;

+  unsigned long  Xr;

+  unsigned long  temp;

+  short       i;

+

+  Xl = *xl;

+  Xr = *xr;

+

+  for (i = 0; i < N; ++i) {

+    Xl = Xl ^ ctx->P[i];

+    Xr = F(ctx, Xl) ^ Xr;

+

+    temp = Xl;

+    Xl = Xr;

+    Xr = temp;

+  }

+

+  temp = Xl;

+  Xl = Xr;

+  Xr = temp;

+

+  Xr = Xr ^ ctx->P[N];

+  Xl = Xl ^ ctx->P[N + 1];

+

+  *xl = Xl;

+  *xr = Xr;

+}

+

+

+static void Blowfish_Decrypt(BFCtx *ctx, unsigned long *xl, unsigned long *xr) {

+  unsigned long  Xl;

+  unsigned long  Xr;

+  unsigned long  temp;

+  short       i;

+

+  Xl = *xl;

+  Xr = *xr;

+

+  for (i = N + 1; i > 1; --i) {

+    Xl = Xl ^ ctx->P[i];

+    Xr = F(ctx, Xl) ^ Xr;

+

+    /* Exchange Xl and Xr */

+    temp = Xl;

+    Xl = Xr;

+    Xr = temp;

+  }

+

+  /* Exchange Xl and Xr */

+  temp = Xl;

+  Xl = Xr;

+  Xr = temp;

+

+  Xr = Xr ^ ctx->P[1];

+  Xl = Xl ^ ctx->P[0];

+

+  *xl = Xl;

+  *xr = Xr;

+}

+

+

+static void Blowfish_Init(BFCtx *ctx, unsigned char *key, int keyLen) {

+  int i, j, k;

+  unsigned long data, datal, datar;

+

+  for (i = 0; i < 4; i++) {

+    for (j = 0; j < 256; j++)

+      ctx->S[i][j] = ORIG_S[i][j];

+  }

+

+  j = 0;

+  for (i = 0; i < N + 2; ++i) {

+    data = 0x00000000;

+    for (k = 0; k < 4; ++k) {

+      data = (data << 8) | key[j];

+      j = j + 1;

+      if (j >= keyLen)

+        j = 0;

+    }

+    ctx->P[i] = ORIG_P[i] ^ data;

+  }

+

+  datal = 0x00000000;

+  datar = 0x00000000;

+

+  for (i = 0; i < N + 2; i += 2) {

+    Blowfish_Encrypt(ctx, &datal, &datar);

+    ctx->P[i] = datal;

+    ctx->P[i + 1] = datar;

+  }

+

+  for (i = 0; i < 4; ++i) {

+    for (j = 0; j < 256; j += 2) {

+      Blowfish_Encrypt(ctx, &datal, &datar);

+      ctx->S[i][j] = datal;

+      ctx->S[i][j + 1] = datar;

+    }

+  }

+}

+

+static void Xor_Block(unsigned char *buf, unsigned char *block) {

+  uint8_t i;

+

+  for (i = 0; i < BF_BLOCKLEN; ++i) {

+    buf[i] ^= block[i];

+  }

+}

+

+/*****************************************************************************/

+/* Public functions:                                                         */

+/*****************************************************************************/

+void bf_init(BFCtx *ctx, uint8_t *key) {

+    Blowfish_Init(ctx, key, BF_KEYLEN);

+}

+

+void bf_ecb_encrypt(BFCtx *ctx, uint8_t *buf) {

+    unsigned long xl, xr;

+

+    xl = (buf[0] << 24) |

+         (buf[1] << 16) |

+         (buf[2] << 8)  |

+         (buf[3]);

+    xr = (buf[4] << 24) |

+         (buf[5] << 16) |

+         (buf[6] << 8)  |

+         (buf[7]);

+

+    Blowfish_Encrypt(ctx, &xl, &xr);

+

+    buf[0] = (xl & 0xFF000000) >> 24;

+    buf[1] = (xl & 0x00FF0000) >> 16;

+    buf[2] = (xl & 0x0000FF00) >> 8;

+    buf[3] = (xl & 0x000000FF);

+    buf[4] = (xr & 0xFF000000) >> 24;

+    buf[5] = (xr & 0x00FF0000) >> 16;

+    buf[6] = (xr & 0x0000FF00) >> 8;

+    buf[7] = (xr & 0x000000FF);

+}

+

+void bf_ecb_decrypt(BFCtx *ctx, uint8_t *buf) {

+    unsigned long xl, xr;

+

+    xl = (buf[0] << 24) |

+         (buf[1] << 16) |

+         (buf[2] << 8)  |

+         (buf[3]);

+    xr = (buf[4] << 24) |

+         (buf[5] << 16) |

+         (buf[6] << 8)  |

+         (buf[7]);

+

+    Blowfish_Decrypt(ctx, &xl, &xr);

+

+    buf[0] = (xl & 0xFF000000) >> 24;

+    buf[1] = (xl & 0x00FF0000) >> 16;

+    buf[2] = (xl & 0x0000FF00) >> 8;

+    buf[3] = (xl & 0x000000FF);

+    buf[4] = (xr & 0xFF000000) >> 24;

+    buf[5] = (xr & 0x00FF0000) >> 16;

+    buf[6] = (xr & 0x0000FF00) >> 8;

+    buf[7] = (xr & 0x000000FF);

+}

+

+void bf_cbc_encrypt(BFCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length) {

+    size_t i;

+    uint8_t *block = iv;

+

+    for (i = 0; i < length; i += BF_BLOCKLEN) {

+      Xor_Block(buf, block);

+      bf_ecb_encrypt(ctx, buf);

+      block = buf;

+      buf += BF_BLOCKLEN;

+    }

+}

+

+void bf_cbc_decrypt(BFCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length) {

+    size_t i;

+    uint8_t block[BF_BLOCKLEN];

+    uint8_t block_next[BF_BLOCKLEN];

+

+    memcpy(block, iv, BF_BLOCKLEN);

+    for (i = 0; i < length; i += BF_BLOCKLEN) {

+      memcpy(block_next, buf, BF_BLOCKLEN);

+      bf_ecb_decrypt(ctx, buf);

+      Xor_Block(buf, block);

+      memcpy(block, block_next, BF_BLOCKLEN);

+      buf += BF_BLOCKLEN;

+    }

+}

diff --git a/crypto/blowfish/blowfish.h b/crypto/blowfish/blowfish.h
new file mode 100644
index 0000000..a317812
--- /dev/null
+++ b/crypto/blowfish/blowfish.h
@@ -0,0 +1,38 @@
+/*

+blowfish.h:  Header file for blowfish.c

+

+Copyright (C) 1997 by Paul Kocher

+

+This library is free software; you can redistribute it and/or

+modify it under the terms of the GNU Lesser General Public

+License as published by the Free Software Foundation; either

+version 2.1 of the License, or (at your option) any later version.

+This library is distributed in the hope that it will be useful,

+but WITHOUT ANY WARRANTY; without even the implied warranty of

+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

+Lesser General Public License for more details.

+You should have received a copy of the GNU Lesser General Public

+License along with this library; if not, write to the Free Software

+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

+

+

+See blowfish.c for more information about this file.

+*/

+

+#include <stdint.h>

+#include <stddef.h>

+

+#define BF_KEYLEN       16

+#define BF_BLOCKLEN     8

+

+typedef struct {

+  unsigned long P[16 + 2];

+  unsigned long S[4][256];

+} BFCtx;

+

+void bf_init(BFCtx *ctx, uint8_t *key);

+void bf_ecb_encrypt(BFCtx *ctx, uint8_t *buf);

+void bf_ecb_decrypt(BFCtx *ctx, uint8_t *buf);

+void bf_cbc_decrypt(BFCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length);

+void bf_cbc_encrypt(BFCtx *ctx, uint8_t *iv, uint8_t *buf, size_t length);

+

diff --git a/crypto/sha/sha1.c b/crypto/sha/sha1.c
new file mode 100644
index 0000000..9e5ff68
--- /dev/null
+++ b/crypto/sha/sha1.c
@@ -0,0 +1,294 @@
+/*
+SHA-1 in C
+By Steve Reid <steve@edmweb.com>
+100% Public Domain
+
+Test Vectors (from FIPS PUB 180-1)
+"abc"
+  A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
+"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
+  84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
+A million repetitions of "a"
+  34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
+*/
+
+/* #define LITTLE_ENDIAN * This should be #define'd already, if true. */
+/* #define SHA1HANDSOFF * Copies data before messing with it. */
+
+#define SHA1HANDSOFF
+
+#include <stdio.h>
+#include <string.h>
+
+/* for uint32_t */
+#include <stdint.h>
+
+#include "sha1.h"
+
+
+#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
+
+/* blk0() and blk() perform the initial expand. */
+/* I got the idea of expanding during the round function from SSLeay */
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
+    |(rol(block->l[i],8)&0x00FF00FF))
+#elif BYTE_ORDER == BIG_ENDIAN
+#define blk0(i) block->l[i]
+#else
+#error "Endianness not defined!"
+#endif
+#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
+    ^block->l[(i+2)&15]^block->l[i&15],1))
+
+/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
+#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
+#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
+#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
+#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
+#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
+
+
+/* Hash a single 512-bit block. This is the core of the algorithm. */
+
+void SHA1Transform(
+    uint32_t state[5],
+    const unsigned char buffer[64]
+)
+{
+    uint32_t a, b, c, d, e;
+
+    typedef union
+    {
+        unsigned char c[64];
+        uint32_t l[16];
+    } CHAR64LONG16;
+
+#ifdef SHA1HANDSOFF
+    CHAR64LONG16 block[1];      /* use array to appear as a pointer */
+
+    memcpy(block, buffer, 64);
+#else
+    /* The following had better never be used because it causes the
+     * pointer-to-const buffer to be cast into a pointer to non-const.
+     * And the result is written through.  I threw a "const" in, hoping
+     * this will cause a diagnostic.
+     */
+    CHAR64LONG16 *block = (const CHAR64LONG16 *) buffer;
+#endif
+    /* Copy context->state[] to working vars */
+    a = state[0];
+    b = state[1];
+    c = state[2];
+    d = state[3];
+    e = state[4];
+    /* 4 rounds of 20 operations each. Loop unrolled. */
+    R0(a, b, c, d, e, 0);
+    R0(e, a, b, c, d, 1);
+    R0(d, e, a, b, c, 2);
+    R0(c, d, e, a, b, 3);
+    R0(b, c, d, e, a, 4);
+    R0(a, b, c, d, e, 5);
+    R0(e, a, b, c, d, 6);
+    R0(d, e, a, b, c, 7);
+    R0(c, d, e, a, b, 8);
+    R0(b, c, d, e, a, 9);
+    R0(a, b, c, d, e, 10);
+    R0(e, a, b, c, d, 11);
+    R0(d, e, a, b, c, 12);
+    R0(c, d, e, a, b, 13);
+    R0(b, c, d, e, a, 14);
+    R0(a, b, c, d, e, 15);
+    R1(e, a, b, c, d, 16);
+    R1(d, e, a, b, c, 17);
+    R1(c, d, e, a, b, 18);
+    R1(b, c, d, e, a, 19);
+    R2(a, b, c, d, e, 20);
+    R2(e, a, b, c, d, 21);
+    R2(d, e, a, b, c, 22);
+    R2(c, d, e, a, b, 23);
+    R2(b, c, d, e, a, 24);
+    R2(a, b, c, d, e, 25);
+    R2(e, a, b, c, d, 26);
+    R2(d, e, a, b, c, 27);
+    R2(c, d, e, a, b, 28);
+    R2(b, c, d, e, a, 29);
+    R2(a, b, c, d, e, 30);
+    R2(e, a, b, c, d, 31);
+    R2(d, e, a, b, c, 32);
+    R2(c, d, e, a, b, 33);
+    R2(b, c, d, e, a, 34);
+    R2(a, b, c, d, e, 35);
+    R2(e, a, b, c, d, 36);
+    R2(d, e, a, b, c, 37);
+    R2(c, d, e, a, b, 38);
+    R2(b, c, d, e, a, 39);
+    R3(a, b, c, d, e, 40);
+    R3(e, a, b, c, d, 41);
+    R3(d, e, a, b, c, 42);
+    R3(c, d, e, a, b, 43);
+    R3(b, c, d, e, a, 44);
+    R3(a, b, c, d, e, 45);
+    R3(e, a, b, c, d, 46);
+    R3(d, e, a, b, c, 47);
+    R3(c, d, e, a, b, 48);
+    R3(b, c, d, e, a, 49);
+    R3(a, b, c, d, e, 50);
+    R3(e, a, b, c, d, 51);
+    R3(d, e, a, b, c, 52);
+    R3(c, d, e, a, b, 53);
+    R3(b, c, d, e, a, 54);
+    R3(a, b, c, d, e, 55);
+    R3(e, a, b, c, d, 56);
+    R3(d, e, a, b, c, 57);
+    R3(c, d, e, a, b, 58);
+    R3(b, c, d, e, a, 59);
+    R4(a, b, c, d, e, 60);
+    R4(e, a, b, c, d, 61);
+    R4(d, e, a, b, c, 62);
+    R4(c, d, e, a, b, 63);
+    R4(b, c, d, e, a, 64);
+    R4(a, b, c, d, e, 65);
+    R4(e, a, b, c, d, 66);
+    R4(d, e, a, b, c, 67);
+    R4(c, d, e, a, b, 68);
+    R4(b, c, d, e, a, 69);
+    R4(a, b, c, d, e, 70);
+    R4(e, a, b, c, d, 71);
+    R4(d, e, a, b, c, 72);
+    R4(c, d, e, a, b, 73);
+    R4(b, c, d, e, a, 74);
+    R4(a, b, c, d, e, 75);
+    R4(e, a, b, c, d, 76);
+    R4(d, e, a, b, c, 77);
+    R4(c, d, e, a, b, 78);
+    R4(b, c, d, e, a, 79);
+    /* Add the working vars back into context.state[] */
+    state[0] += a;
+    state[1] += b;
+    state[2] += c;
+    state[3] += d;
+    state[4] += e;
+    /* Wipe variables */
+    a = b = c = d = e = 0;
+#ifdef SHA1HANDSOFF
+    memset(block, '\0', sizeof(block));
+#endif
+}
+
+
+/* SHA1Init - Initialize new context */
+
+void SHA1Init(
+    SHA1_CTX * context
+)
+{
+    /* SHA1 initialization constants */
+    context->state[0] = 0x67452301;
+    context->state[1] = 0xEFCDAB89;
+    context->state[2] = 0x98BADCFE;
+    context->state[3] = 0x10325476;
+    context->state[4] = 0xC3D2E1F0;
+    context->count[0] = context->count[1] = 0;
+}
+
+
+/* Run your data through this. */
+
+void SHA1Update(
+    SHA1_CTX * context,
+    const unsigned char *data,
+    uint32_t len
+)
+{
+    uint32_t i;
+
+    uint32_t j;
+
+    j = context->count[0];
+    if ((context->count[0] += len << 3) < j)
+        context->count[1]++;
+    context->count[1] += (len >> 29);
+    j = (j >> 3) & 63;
+    if ((j + len) > 63)
+    {
+        memcpy(&context->buffer[j], data, (i = 64 - j));
+        SHA1Transform(context->state, context->buffer);
+        for (; i + 63 < len; i += 64)
+        {
+            SHA1Transform(context->state, &data[i]);
+        }
+        j = 0;
+    }
+    else
+        i = 0;
+    memcpy(&context->buffer[j], &data[i], len - i);
+}
+
+
+/* Add padding and return the message digest. */
+
+void SHA1Final(
+    unsigned char digest[20],
+    SHA1_CTX * context
+)
+{
+    unsigned i;
+
+    unsigned char finalcount[8];
+
+    unsigned char c;
+
+#if 0    /* untested "improvement" by DHR */
+    /* Convert context->count to a sequence of bytes
+     * in finalcount.  Second element first, but
+     * big-endian order within element.
+     * But we do it all backwards.
+     */
+    unsigned char *fcp = &finalcount[8];
+
+    for (i = 0; i < 2; i++)
+    {
+        uint32_t t = context->count[i];
+
+        int j;
+
+        for (j = 0; j < 4; t >>= 8, j++)
+            *--fcp = (unsigned char) t}
+#else
+    for (i = 0; i < 8; i++)
+    {
+        finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >> ((3 - (i & 3)) * 8)) & 255);      /* Endian independent */
+    }
+#endif
+    c = 0200;
+    SHA1Update(context, &c, 1);
+    while ((context->count[0] & 504) != 448)
+    {
+        c = 0000;
+        SHA1Update(context, &c, 1);
+    }
+    SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */
+    for (i = 0; i < 20; i++)
+    {
+        digest[i] = (unsigned char)
+            ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
+    }
+    /* Wipe variables */
+    memset(context, '\0', sizeof(*context));
+    memset(&finalcount, '\0', sizeof(finalcount));
+}
+
+void SHA1(
+    char *hash_out,
+    const char *str,
+    int len)
+{
+    SHA1_CTX ctx;
+    unsigned int ii;
+
+    SHA1Init(&ctx);
+    for (ii=0; ii<len; ii+=1)
+        SHA1Update(&ctx, (const unsigned char*)str + ii, 1);
+    SHA1Final((unsigned char *)hash_out, &ctx);
+}
diff --git a/crypto/sha/sha1.h b/crypto/sha/sha1.h
new file mode 100644
index 0000000..96bb008
--- /dev/null
+++ b/crypto/sha/sha1.h
@@ -0,0 +1,44 @@
+#ifndef SHA1_H
+#define SHA1_H
+
+/*
+   SHA-1 in C
+   By Steve Reid <steve@edmweb.com>
+   100% Public Domain
+ */
+
+#include "stdint.h"
+
+typedef struct
+{
+    uint32_t state[5];
+    uint32_t count[2];
+    unsigned char buffer[64];
+} SHA1_CTX;
+
+void SHA1Transform(
+    uint32_t state[5],
+    const unsigned char buffer[64]
+    );
+
+void SHA1Init(
+    SHA1_CTX * context
+    );
+
+void SHA1Update(
+    SHA1_CTX * context,
+    const unsigned char *data,
+    uint32_t len
+    );
+
+void SHA1Final(
+    unsigned char digest[20],
+    SHA1_CTX * context
+    );
+
+void SHA1(
+    char *hash_out,
+    const char *str,
+    int len);
+
+#endif /* SHA1_H */