Merge rathena repository to form Hercules initial commit.

1 files changed, 240 insertions, 0 deletions

diff --git a/src/common/md5calc.c b/src/common/md5calc.c
new file mode 100644
index 000000000..05fde42cc
--- /dev/null
+++ b/src/common/md5calc.c
@@ -0,0 +1,240 @@
+/***********************************************************
+ * md5 calculation algorithm
+ *
+ * The source code referred to the following URL.
+ * http://www.geocities.co.jp/SiliconValley-Oakland/8878/lab17/lab17.html
+ *
+ ***********************************************************/
+
+#include "../common/random.h"
+#include "md5calc.h"
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef UINT_MAX
+#define UINT_MAX 4294967295U
+#endif
+
+// Global variable
+static unsigned int *pX;
+
+// String Table
+static const unsigned int T[] = {
+   0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, //0
+   0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, //4
+   0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, //8
+   0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, //12
+   0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, //16
+   0xd62f105d,  0x2441453, 0xd8a1e681, 0xe7d3fbc8, //20
+   0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, //24
+   0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, //28
+   0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, //32
+   0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, //36
+   0x289b7ec6, 0xeaa127fa, 0xd4ef3085,  0x4881d05, //40
+   0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, //44
+   0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, //48
+   0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, //52
+   0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, //56
+   0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391  //60
+};
+
+// ROTATE_LEFT   The left is made to rotate x [ n-bit ]. This is diverted as it is from RFC.
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+
+// The function used for other calculation
+static unsigned int F(unsigned int X, unsigned int Y, unsigned int Z)
+{
+   return (X & Y) | (~X & Z);
+}
+static unsigned int G(unsigned int X, unsigned int Y, unsigned int Z)
+{
+   return (X & Z) | (Y & ~Z);
+}
+static unsigned int H(unsigned int X, unsigned int Y, unsigned int Z)
+{
+   return X ^ Y ^ Z;
+}
+static unsigned int I(unsigned int X, unsigned int Y, unsigned int Z)
+{
+   return Y ^ (X | ~Z);
+}
+
+static unsigned int Round(unsigned int a, unsigned int b, unsigned int FGHI,
+                     unsigned int k, unsigned int s, unsigned int i)
+{
+   return b + ROTATE_LEFT(a + FGHI + pX[k] + T[i], s);
+}
+
+static void Round1(unsigned int *a, unsigned int b, unsigned int c,
+		unsigned int d,unsigned int k, unsigned int s, unsigned int i)
+{
+	*a = Round(*a, b, F(b,c,d), k, s, i);
+}
+static void Round2(unsigned int *a, unsigned int b, unsigned int c,
+		unsigned int d,unsigned int k, unsigned int s, unsigned int i)
+{
+	*a = Round(*a, b, G(b,c,d), k, s, i);
+}
+static void Round3(unsigned int *a, unsigned int b, unsigned int c,
+		unsigned int d,unsigned int k, unsigned int s, unsigned int i)
+{
+	*a = Round(*a, b, H(b,c,d), k, s, i);
+}
+static void Round4(unsigned int *a, unsigned int b, unsigned int c,
+		unsigned int d,unsigned int k, unsigned int s, unsigned int i)
+{
+	*a = Round(*a, b, I(b,c,d), k, s, i);
+}
+
+static void MD5_Round_Calculate(const unsigned char *block,
+	unsigned int *A2, unsigned int *B2, unsigned int *C2, unsigned int *D2)
+{
+	//create X It is since it is required.
+	unsigned int X[16]; //512bit 64byte
+	int j,k;
+
+	//Save A as AA, B as BB, C as CC, and and D as DD (saving of A, B, C, and D)
+	unsigned int A=*A2, B=*B2, C=*C2, D=*D2;
+	unsigned int AA = A,BB = B,CC = C,DD = D;
+
+	//It is a large region variable reluctantly because of calculation of a round. . . for Round1...4
+	pX = X;
+
+	//Copy block(padding_message) i into X
+	for (j=0,k=0; j<64; j+=4,k++)
+		X[k] = ( (unsigned int )block[j] )         // 8byte*4 -> 32byte conversion
+			| ( ((unsigned int )block[j+1]) << 8 ) // A function called Decode as used in the field of RFC
+			| ( ((unsigned int )block[j+2]) << 16 )
+			| ( ((unsigned int )block[j+3]) << 24 );
+
+
+   //Round 1
+   Round1(&A,B,C,D,  0, 7,  0); Round1(&D,A,B,C,  1, 12,  1); Round1(&C,D,A,B,  2, 17,  2); Round1(&B,C,D,A,  3, 22,  3);
+   Round1(&A,B,C,D,  4, 7,  4); Round1(&D,A,B,C,  5, 12,  5); Round1(&C,D,A,B,  6, 17,  6); Round1(&B,C,D,A,  7, 22,  7);
+   Round1(&A,B,C,D,  8, 7,  8); Round1(&D,A,B,C,  9, 12,  9); Round1(&C,D,A,B, 10, 17, 10); Round1(&B,C,D,A, 11, 22, 11);
+   Round1(&A,B,C,D, 12, 7, 12); Round1(&D,A,B,C, 13, 12, 13); Round1(&C,D,A,B, 14, 17, 14); Round1(&B,C,D,A, 15, 22, 15);
+
+   //Round 2
+   Round2(&A,B,C,D,  1, 5, 16); Round2(&D,A,B,C,  6, 9, 17); Round2(&C,D,A,B, 11, 14, 18); Round2(&B,C,D,A,  0, 20, 19);
+   Round2(&A,B,C,D,  5, 5, 20); Round2(&D,A,B,C, 10, 9, 21); Round2(&C,D,A,B, 15, 14, 22); Round2(&B,C,D,A,  4, 20, 23);
+   Round2(&A,B,C,D,  9, 5, 24); Round2(&D,A,B,C, 14, 9, 25); Round2(&C,D,A,B,  3, 14, 26); Round2(&B,C,D,A,  8, 20, 27);
+   Round2(&A,B,C,D, 13, 5, 28); Round2(&D,A,B,C,  2, 9, 29); Round2(&C,D,A,B,  7, 14, 30); Round2(&B,C,D,A, 12, 20, 31);
+
+   //Round 3
+   Round3(&A,B,C,D,  5, 4, 32); Round3(&D,A,B,C,  8, 11, 33); Round3(&C,D,A,B, 11, 16, 34); Round3(&B,C,D,A, 14, 23, 35);
+   Round3(&A,B,C,D,  1, 4, 36); Round3(&D,A,B,C,  4, 11, 37); Round3(&C,D,A,B,  7, 16, 38); Round3(&B,C,D,A, 10, 23, 39);
+   Round3(&A,B,C,D, 13, 4, 40); Round3(&D,A,B,C,  0, 11, 41); Round3(&C,D,A,B,  3, 16, 42); Round3(&B,C,D,A,  6, 23, 43);
+   Round3(&A,B,C,D,  9, 4, 44); Round3(&D,A,B,C, 12, 11, 45); Round3(&C,D,A,B, 15, 16, 46); Round3(&B,C,D,A,  2, 23, 47);
+
+   //Round 4
+   Round4(&A,B,C,D,  0, 6, 48); Round4(&D,A,B,C,  7, 10, 49); Round4(&C,D,A,B, 14, 15, 50); Round4(&B,C,D,A,  5, 21, 51);
+   Round4(&A,B,C,D, 12, 6, 52); Round4(&D,A,B,C,  3, 10, 53); Round4(&C,D,A,B, 10, 15, 54); Round4(&B,C,D,A,  1, 21, 55);
+   Round4(&A,B,C,D,  8, 6, 56); Round4(&D,A,B,C, 15, 10, 57); Round4(&C,D,A,B,  6, 15, 58); Round4(&B,C,D,A, 13, 21, 59);
+   Round4(&A,B,C,D,  4, 6, 60); Round4(&D,A,B,C, 11, 10, 61); Round4(&C,D,A,B,  2, 15, 62); Round4(&B,C,D,A,  9, 21, 63);
+
+   // Then perform the following additions. (let's add)
+   *A2 = A + AA;
+   *B2 = B + BB;
+   *C2 = C + CC;
+   *D2 = D + DD;
+
+   //The clearance of confidential information
+   memset(pX, 0, sizeof(X));
+}
+
+static void MD5_String2binary(const char * string, unsigned char * output)
+{
+//var
+   /*8bit*/
+   unsigned char padding_message[64]; //Extended message   512bit 64byte
+   unsigned char *pstring;            //The position of string in the present scanning notes is held.
+
+   /*32bit*/
+   unsigned int string_byte_len,     //The byte chief of string is held.
+                string_bit_len,      //The bit length of string is held.
+                copy_len,            //The number of bytes which is used by 1-3 and which remained
+                msg_digest[4];       //Message digest   128bit 4byte
+   unsigned int *A = &msg_digest[0], //The message digest in accordance with RFC (reference)
+                *B = &msg_digest[1],
+                *C = &msg_digest[2],
+                *D = &msg_digest[3];
+	int i;
+
+//prog
+   //Step 3.Initialize MD Buffer (although it is the initialization; step 3 of A, B, C, and D -- unavoidable -- a head)
+   *A = 0x67452301;
+   *B = 0xefcdab89;
+   *C = 0x98badcfe;
+   *D = 0x10325476;
+
+   //Step 1.Append Padding Bits (extension of a mark bit)
+   //1-1
+   string_byte_len = (unsigned int)strlen(string);    //The byte chief of a character sequence is acquired.
+   pstring = (unsigned char *)string; //The position of the present character sequence is set.
+
+   //1-2  Repeat calculation until length becomes less than 64 bytes.
+   for (i=string_byte_len; 64<=i; i-=64,pstring+=64)
+        MD5_Round_Calculate(pstring, A,B,C,D);
+
+   //1-3
+   copy_len = string_byte_len % 64;                               //The number of bytes which remained is computed.
+   strncpy((char *)padding_message, (char *)pstring, copy_len); //A message is copied to an extended bit sequence.
+   memset(padding_message+copy_len, 0, 64 - copy_len);           //It buries by 0 until it becomes extended bit length.
+   padding_message[copy_len] |= 0x80;                            //The next of a message is 1.
+
+   //1-4
+   //If 56 bytes or more (less than 64 bytes) of remainder becomes, it will calculate by extending to 64 bytes.
+   if (56 <= copy_len) {
+       MD5_Round_Calculate(padding_message, A,B,C,D);
+       memset(padding_message, 0, 56); //56 bytes is newly fill uped with 0.
+   }
+
+   //Step 2.Append Length (the information on length is added)
+   string_bit_len = string_byte_len * 8;             //From the byte chief to bit length (32 bytes of low rank)
+   memcpy(&padding_message[56], &string_bit_len, 4); //32 bytes of low rank is set.
+
+   //When bit length cannot be expressed in 32 bytes of low rank, it is a beam raising to a higher rank.
+  if (UINT_MAX / 8 < string_byte_len) {
+      unsigned int high = (string_byte_len - UINT_MAX / 8) * 8;
+      memcpy(&padding_message[60], &high, 4);
+  } else
+      memset(&padding_message[60], 0, 4); //In this case, it is good for a higher rank at 0.
+
+   //Step 4.Process Message in 16-Word Blocks (calculation of MD5)
+   MD5_Round_Calculate(padding_message, A,B,C,D);
+
+   //Step 5.Output (output)
+   memcpy(output,msg_digest,16);
+}
+
+//-------------------------------------------------------------------
+// The function for the exteriors
+
+/** output is the coded binary in the character sequence which wants to code string. */
+void MD5_Binary(const char * string, unsigned char * output)
+{
+	MD5_String2binary(string,output);
+}
+
+/** output is the coded character sequence in the character sequence which wants to code string. */
+void MD5_String(const char * string, char * output)
+{
+	unsigned char digest[16];
+
+	MD5_String2binary(string,digest);
+	sprintf(output,	"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
+		digest[ 0], digest[ 1], digest[ 2], digest[ 3],
+		digest[ 4], digest[ 5], digest[ 6], digest[ 7],
+		digest[ 8], digest[ 9], digest[10], digest[11],
+		digest[12], digest[13], digest[14], digest[15]);
+}
+
+/** output is a sequence of non-zero characters to be used as password salt. */
+void MD5_Salt(unsigned int len, char * output)
+{
+	unsigned int i;
+	for( i = 0; i < len; ++i )
+		output[i] = (char)(1 + rnd() % 255);
+
+}