1 files changed, 364 insertions, 364 deletions

diff --git a/source/md5/md5.cpp b/source/md5/md5.cpp
index 2b9e10c9f..39337da5d 100644
--- a/source/md5/md5.cpp
+++ b/source/md5/md5.cpp
@@ -1,364 +1,364 @@
-/* MD5

- converted to C++ class by Frank Thilo (thilo@unix-ag.org)

- for bzflag (http://www.bzflag.org)

-

-   based on:

-

-   md5.h and md5.c

-   reference implemantion of RFC 1321

-

-   Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All

-rights reserved.

-

-License to copy and use this software is granted provided that it

-is identified as the "RSA Data Security, Inc. MD5 Message-Digest

-Algorithm" in all material mentioning or referencing this software

-or this function.

-

-License is also granted to make and use derivative works provided

-that such works are identified as "derived from the RSA Data

-Security, Inc. MD5 Message-Digest Algorithm" in all material

-mentioning or referencing the derived work.

-

-RSA Data Security, Inc. makes no representations concerning either

-the merchantability of this software or the suitability of this

-software for any particular purpose. It is provided "as is"

-without express or implied warranty of any kind.

-

-These notices must be retained in any copies of any part of this

-documentation and/or software.

-

-*/

-

-#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules

-

-/* interface header */

-#include "md5.h"

-

-

-

-

-

-// Constants for MD5Transform routine.

-#define S11 7

-#define S12 12

-#define S13 17

-#define S14 22

-#define S21 5

-#define S22 9

-#define S23 14

-#define S24 20

-#define S31 4

-#define S32 11

-#define S33 16

-#define S34 23

-#define S41 6

-#define S42 10

-#define S43 15

-#define S44 21

-

-///////////////////////////////////////////////

-

-// F, G, H and I are basic MD5 functions.

-inline MD5::uint4 MD5::F(uint4 x, uint4 y, uint4 z) {

-  return x&y | ~x&z;

-}

-

-inline MD5::uint4 MD5::G(uint4 x, uint4 y, uint4 z) {

-  return x&z | y&~z;

-}

-

-inline MD5::uint4 MD5::H(uint4 x, uint4 y, uint4 z) {

-  return x^y^z;

-}

-

-inline MD5::uint4 MD5::I(uint4 x, uint4 y, uint4 z) {

-  return y ^ (x | ~z);

-}

-

-// rotate_left rotates x left n bits.

-inline MD5::uint4 MD5::rotate_left(uint4 x, int n) {

-  return (x << n) | (x >> (32-n));

-}

-

-// FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.

-// Rotation is separate from addition to prevent recomputation.

-inline void MD5::FF(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {

-  a = rotate_left(a+ F(b,c,d) + x + ac, s) + b;

-}

-

-inline void MD5::GG(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {

-  a = rotate_left(a + G(b,c,d) + x + ac, s) + b;

-}

-

-inline void MD5::HH(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {

-  a = rotate_left(a + H(b,c,d) + x + ac, s) + b;

-}

-

-inline void MD5::II(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {

-  a = rotate_left(a + I(b,c,d) + x + ac, s) + b;

-}

-

-//////////////////////////////////////////////

-

-// default ctor, just initailize

-MD5::MD5()

-{

-  init();

-}

-

-//////////////////////////////////////////////

-

-// nifty shortcut ctor, compute MD5 for string and finalize it right away

-MD5::MD5(const std::string &text)

-{

-  init();

-  update(text.c_str(), text.length());

-  finalize();

-}

-

-//////////////////////////////

-

-void MD5::init()

-{

-  finalized=false;

-

-  count[0] = 0;

-  count[1] = 0;

-

-  // load magic initialization constants.

-  state[0] = 0x67452301;

-  state[1] = 0xefcdab89;

-  state[2] = 0x98badcfe;

-  state[3] = 0x10325476;

-}

-

-//////////////////////////////

-

-// decodes input (unsigned char) into output (uint4). Assumes len is a multiple of 4.

-void MD5::decode(uint4 output[], const uint1 input[], size_type len)

-{

-  for (unsigned int i = 0, j = 0; j < len; i++, j += 4)

-    output[i] = ((uint4)input[j]) | (((uint4)input[j+1]) << 8) |

-      (((uint4)input[j+2]) << 16) | (((uint4)input[j+3]) << 24);

-}

-

-//////////////////////////////

-

-// encodes input (uint4) into output (unsigned char). Assumes len is

-// a multiple of 4.

-void MD5::encode(uint1 output[], const uint4 input[], size_type len)

-{

-  for (size_type i = 0, j = 0; j < len; i++, j += 4) {

-    output[j] = input[i] & 0xff;

-    output[j+1] = (input[i] >> 8) & 0xff;

-    output[j+2] = (input[i] >> 16) & 0xff;

-    output[j+3] = (input[i] >> 24) & 0xff;

-  }

-}

-

-//////////////////////////////

-

-// apply MD5 algo on a block

-void MD5::transform(const uint1 block[blocksize])

-{

-  uint4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];

-  decode (x, block, blocksize);

-

-  /* Round 1 */

-  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */

-  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */

-  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */

-  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */

-  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */

-  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */

-  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */

-  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */

-  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */

-  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */

-  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */

-  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */

-  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */

-  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */

-  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */

-  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */

-

-  /* Round 2 */

-  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */

-  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */

-  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */

-  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */

-  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */

-  GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */

-  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */

-  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */

-  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */

-  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */

-  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */

-  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */

-  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */

-  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */

-  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */

-  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */

-

-  /* Round 3 */

-  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */

-  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */

-  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */

-  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */

-  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */

-  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */

-  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */

-  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */

-  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */

-  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */

-  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */

-  HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */

-  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */

-  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */

-  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */

-  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */

-

-  /* Round 4 */

-  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */

-  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */

-  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */

-  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */

-  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */

-  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */

-  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */

-  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */

-  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */

-  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */

-  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */

-  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */

-  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */

-  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */

-  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */

-  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */

-

-  state[0] += a;

-  state[1] += b;

-  state[2] += c;

-  state[3] += d;

-

-  // Zeroize sensitive information.

-  memset(x, 0, sizeof x);

-}

-

-//////////////////////////////

-

-// MD5 block update operation. Continues an MD5 message-digest

-// operation, processing another message block

-void MD5::update(const unsigned char input[], size_type length)

-{

-  // compute number of bytes mod 64

-  size_type index = count[0] / 8 % blocksize;

-

-  // Update number of bits

-  if ((count[0] += (length << 3)) < (length << 3))

-    count[1]++;

-  count[1] += (length >> 29);

-

-  // number of bytes we need to fill in buffer

-  size_type firstpart = 64 - index;

-

-  size_type i;

-

-  // transform as many times as possible.

-  if (length >= firstpart)

-  {

-    // fill buffer first, transform

-    memcpy(&buffer[index], input, firstpart);

-    transform(buffer);

-

-    // transform chunks of blocksize (64 bytes)

-    for (i = firstpart; i + blocksize <= length; i += blocksize)

-      transform(&input[i]);

-

-    index = 0;

-  }

-  else

-    i = 0;

-

-  // buffer remaining input

-  memcpy(&buffer[index], &input[i], length-i);

-}

-

-//////////////////////////////

-

-// for convenience provide a verson with signed char

-void MD5::update(const char input[], size_type length)

-{

-  update((const unsigned char*)input, length);

-}

-

-//////////////////////////////

-

-// MD5 finalization. Ends an MD5 message-digest operation, writing the

-// the message digest and zeroizing the context.

-MD5& MD5::finalize()

-{

-  static unsigned char padding[64] = {

-    0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

-  };

-

-  if (!finalized) {

-    // Save number of bits

-    unsigned char bits[8];

-    encode(bits, count, 8);

-

-    // pad out to 56 mod 64.

-    size_type index = count[0] / 8 % 64;

-    size_type padLen = (index < 56) ? (56 - index) : (120 - index);

-    update(padding, padLen);

-

-    // Append length (before padding)

-    update(bits, 8);

-

-    // Store state in digest

-    encode(digest, state, 16);

-

-    // Zeroize sensitive information.

-    memset(buffer, 0, sizeof buffer);

-    memset(count, 0, sizeof count);

-

-    finalized=true;

-  }

-

-  return *this;

-}

-

-//////////////////////////////

-

-// return hex representation of digest as string

-std::string MD5::hexdigest() const

-{

-  if (!finalized)

-    return "";

-

-  char buf[33];

-  for (int i=0; i<16; i++)

-    sprintf(buf+i*2, "%02x", digest[i]);

-  buf[32]=0;

-

-  return std::string(buf);

-}

-

-//////////////////////////////

-

-std::ostream& operator<<(std::ostream& out, MD5 md5)

-{

-  return out << md5.hexdigest();

-}

-

-//////////////////////////////

-

-std::string md5(const std::string & str)

-{

-    MD5 md5 = MD5(str);

-

-    return md5.hexdigest();

-}

+/* MD5
+ converted to C++ class by Frank Thilo (thilo@unix-ag.org)
+ for bzflag (http://www.bzflag.org)
+
+   based on:
+
+   md5.h and md5.c
+   reference implemantion of RFC 1321
+
+   Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
+rights reserved.
+
+License to copy and use this software is granted provided that it
+is identified as the "RSA Data Security, Inc. MD5 Message-Digest
+Algorithm" in all material mentioning or referencing this software
+or this function.
+
+License is also granted to make and use derivative works provided
+that such works are identified as "derived from the RSA Data
+Security, Inc. MD5 Message-Digest Algorithm" in all material
+mentioning or referencing the derived work.
+
+RSA Data Security, Inc. makes no representations concerning either
+the merchantability of this software or the suitability of this
+software for any particular purpose. It is provided "as is"
+without express or implied warranty of any kind.
+
+These notices must be retained in any copies of any part of this
+documentation and/or software.
+
+*/
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+/* interface header */
+#include "md5.h"
+
+
+
+
+
+// Constants for MD5Transform routine.
+#define S11 7
+#define S12 12
+#define S13 17
+#define S14 22
+#define S21 5
+#define S22 9
+#define S23 14
+#define S24 20
+#define S31 4
+#define S32 11
+#define S33 16
+#define S34 23
+#define S41 6
+#define S42 10
+#define S43 15
+#define S44 21
+
+///////////////////////////////////////////////
+
+// F, G, H and I are basic MD5 functions.
+inline MD5::uint4 MD5::F(uint4 x, uint4 y, uint4 z) {
+  return x&y | ~x&z;
+}
+
+inline MD5::uint4 MD5::G(uint4 x, uint4 y, uint4 z) {
+  return x&z | y&~z;
+}
+
+inline MD5::uint4 MD5::H(uint4 x, uint4 y, uint4 z) {
+  return x^y^z;
+}
+
+inline MD5::uint4 MD5::I(uint4 x, uint4 y, uint4 z) {
+  return y ^ (x | ~z);
+}
+
+// rotate_left rotates x left n bits.
+inline MD5::uint4 MD5::rotate_left(uint4 x, int n) {
+  return (x << n) | (x >> (32-n));
+}
+
+// FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
+// Rotation is separate from addition to prevent recomputation.
+inline void MD5::FF(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {
+  a = rotate_left(a+ F(b,c,d) + x + ac, s) + b;
+}
+
+inline void MD5::GG(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {
+  a = rotate_left(a + G(b,c,d) + x + ac, s) + b;
+}
+
+inline void MD5::HH(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {
+  a = rotate_left(a + H(b,c,d) + x + ac, s) + b;
+}
+
+inline void MD5::II(uint4 &a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac) {
+  a = rotate_left(a + I(b,c,d) + x + ac, s) + b;
+}
+
+//////////////////////////////////////////////
+
+// default ctor, just initailize
+MD5::MD5()
+{
+  init();
+}
+
+//////////////////////////////////////////////
+
+// nifty shortcut ctor, compute MD5 for string and finalize it right away
+MD5::MD5(const std::string &text)
+{
+  init();
+  update(text.c_str(), text.length());
+  finalize();
+}
+
+//////////////////////////////
+
+void MD5::init()
+{
+  finalized=false;
+
+  count[0] = 0;
+  count[1] = 0;
+
+  // load magic initialization constants.
+  state[0] = 0x67452301;
+  state[1] = 0xefcdab89;
+  state[2] = 0x98badcfe;
+  state[3] = 0x10325476;
+}
+
+//////////////////////////////
+
+// decodes input (unsigned char) into output (uint4). Assumes len is a multiple of 4.
+void MD5::decode(uint4 output[], const uint1 input[], size_type len)
+{
+  for (unsigned int i = 0, j = 0; j < len; i++, j += 4)
+    output[i] = ((uint4)input[j]) | (((uint4)input[j+1]) << 8) |
+      (((uint4)input[j+2]) << 16) | (((uint4)input[j+3]) << 24);
+}
+
+//////////////////////////////
+
+// encodes input (uint4) into output (unsigned char). Assumes len is
+// a multiple of 4.
+void MD5::encode(uint1 output[], const uint4 input[], size_type len)
+{
+  for (size_type i = 0, j = 0; j < len; i++, j += 4) {
+    output[j] = input[i] & 0xff;
+    output[j+1] = (input[i] >> 8) & 0xff;
+    output[j+2] = (input[i] >> 16) & 0xff;
+    output[j+3] = (input[i] >> 24) & 0xff;
+  }
+}
+
+//////////////////////////////
+
+// apply MD5 algo on a block
+void MD5::transform(const uint1 block[blocksize])
+{
+  uint4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
+  decode (x, block, blocksize);
+
+  /* Round 1 */
+  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
+  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
+  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
+  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
+  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
+  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
+  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
+  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
+  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
+  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
+  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
+  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
+  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
+  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
+  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
+  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
+
+  /* Round 2 */
+  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
+  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
+  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
+  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
+  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
+  GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
+  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
+  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
+  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
+  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
+  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
+  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
+  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
+  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
+  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
+  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
+
+  /* Round 3 */
+  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
+  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
+  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
+  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
+  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
+  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
+  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
+  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
+  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
+  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
+  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
+  HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
+  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
+  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
+  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
+  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
+
+  /* Round 4 */
+  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
+  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
+  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
+  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
+  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
+  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
+  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
+  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
+  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
+  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
+  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
+  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
+  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
+  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
+  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
+  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
+
+  state[0] += a;
+  state[1] += b;
+  state[2] += c;
+  state[3] += d;
+
+  // Zeroize sensitive information.
+  memset(x, 0, sizeof x);
+}
+
+//////////////////////////////
+
+// MD5 block update operation. Continues an MD5 message-digest
+// operation, processing another message block
+void MD5::update(const unsigned char input[], size_type length)
+{
+  // compute number of bytes mod 64
+  size_type index = count[0] / 8 % blocksize;
+
+  // Update number of bits
+  if ((count[0] += (length << 3)) < (length << 3))
+    count[1]++;
+  count[1] += (length >> 29);
+
+  // number of bytes we need to fill in buffer
+  size_type firstpart = 64 - index;
+
+  size_type i;
+
+  // transform as many times as possible.
+  if (length >= firstpart)
+  {
+    // fill buffer first, transform
+    memcpy(&buffer[index], input, firstpart);
+    transform(buffer);
+
+    // transform chunks of blocksize (64 bytes)
+    for (i = firstpart; i + blocksize <= length; i += blocksize)
+      transform(&input[i]);
+
+    index = 0;
+  }
+  else
+    i = 0;
+
+  // buffer remaining input
+  memcpy(&buffer[index], &input[i], length-i);
+}
+
+//////////////////////////////
+
+// for convenience provide a verson with signed char
+void MD5::update(const char input[], size_type length)
+{
+  update((const unsigned char*)input, length);
+}
+
+//////////////////////////////
+
+// MD5 finalization. Ends an MD5 message-digest operation, writing the
+// the message digest and zeroizing the context.
+MD5& MD5::finalize()
+{
+  static unsigned char padding[64] = {
+    0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+  };
+
+  if (!finalized) {
+    // Save number of bits
+    unsigned char bits[8];
+    encode(bits, count, 8);
+
+    // pad out to 56 mod 64.
+    size_type index = count[0] / 8 % 64;
+    size_type padLen = (index < 56) ? (56 - index) : (120 - index);
+    update(padding, padLen);
+
+    // Append length (before padding)
+    update(bits, 8);
+
+    // Store state in digest
+    encode(digest, state, 16);
+
+    // Zeroize sensitive information.
+    memset(buffer, 0, sizeof buffer);
+    memset(count, 0, sizeof count);
+
+    finalized=true;
+  }
+
+  return *this;
+}
+
+//////////////////////////////
+
+// return hex representation of digest as string
+std::string MD5::hexdigest() const
+{
+  if (!finalized)
+    return "";
+
+  char buf[33];
+  for (int i=0; i<16; i++)
+    sprintf(buf+i*2, "%02x", digest[i]);
+  buf[32]=0;
+
+  return std::string(buf);
+}
+
+//////////////////////////////
+
+std::ostream& operator<<(std::ostream& out, MD5 md5)
+{
+  return out << md5.hexdigest();
+}
+
+//////////////////////////////
+
+std::string md5(const std::string & str)
+{
+    MD5 md5 = MD5(str);
+
+    return md5.hexdigest();
+}