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-rw-r--r--src/common/md5calc.c141
1 files changed, 74 insertions, 67 deletions
diff --git a/src/common/md5calc.c b/src/common/md5calc.c
index ad0f7c2d8..bd6b48f10 100644
--- a/src/common/md5calc.c
+++ b/src/common/md5calc.c
@@ -20,30 +20,27 @@
*/
#define HERCULES_CORE
-/***********************************************************
- * md5 calculation algorithm
- *
- * The source code referred to the following URL.
- * http://www.geocities.co.jp/SiliconValley-Oakland/8878/lab17/lab17.html
- *
- ***********************************************************/
-
#include "md5calc.h"
#include "common/cbasetypes.h"
+#include "common/nullpo.h"
#include "common/random.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+/** @file
+ * Implementation of the md5 interface.
+ */
+
struct md5_interface md5_s;
struct md5_interface *md5;
-// Global variable
+/// Global variable
static unsigned int *pX;
-// String Table
+/// String Table
static const unsigned int T[] = {
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, //0
0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, //4
@@ -63,99 +60,102 @@ static const unsigned int T[] = {
0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391 //60
};
-// ROTATE_LEFT The left is made to rotate x [ n-bit ]. This is diverted as it is from RFC.
+/// 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)
+static unsigned int md5_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)
+
+static unsigned int md5_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)
+
+static unsigned int md5_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)
+
+static unsigned int md5_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,
+static unsigned int md5_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,
+static void md5_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);
+ *a = md5_Round(*a, b, md5_F(b,c,d), k, s, i);
}
-static void Round2(unsigned int *a, unsigned int b, unsigned int c,
+static void md5_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);
+ *a = md5_Round(*a, b, md5_G(b,c,d), k, s, i);
}
-static void Round3(unsigned int *a, unsigned int b, unsigned int c,
+static void md5_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);
+ *a = md5_Round(*a, b, md5_H(b,c,d), k, s, i);
}
-static void Round4(unsigned int *a, unsigned int b, unsigned int c,
+static void md5_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);
+ *a = md5_Round(*a, b, md5_I(b,c,d), k, s, i);
}
-static void MD5_Round_Calculate(const unsigned char *block,
+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;
+ 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;
+ 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 );
-
+ 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);
+ md5_Round1(&A,B,C,D, 0, 7, 0); md5_Round1(&D,A,B,C, 1, 12, 1); md5_Round1(&C,D,A,B, 2, 17, 2); md5_Round1(&B,C,D,A, 3, 22, 3);
+ md5_Round1(&A,B,C,D, 4, 7, 4); md5_Round1(&D,A,B,C, 5, 12, 5); md5_Round1(&C,D,A,B, 6, 17, 6); md5_Round1(&B,C,D,A, 7, 22, 7);
+ md5_Round1(&A,B,C,D, 8, 7, 8); md5_Round1(&D,A,B,C, 9, 12, 9); md5_Round1(&C,D,A,B, 10, 17, 10); md5_Round1(&B,C,D,A, 11, 22, 11);
+ md5_Round1(&A,B,C,D, 12, 7, 12); md5_Round1(&D,A,B,C, 13, 12, 13); md5_Round1(&C,D,A,B, 14, 17, 14); md5_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);
+ md5_Round2(&A,B,C,D, 1, 5, 16); md5_Round2(&D,A,B,C, 6, 9, 17); md5_Round2(&C,D,A,B, 11, 14, 18); md5_Round2(&B,C,D,A, 0, 20, 19);
+ md5_Round2(&A,B,C,D, 5, 5, 20); md5_Round2(&D,A,B,C, 10, 9, 21); md5_Round2(&C,D,A,B, 15, 14, 22); md5_Round2(&B,C,D,A, 4, 20, 23);
+ md5_Round2(&A,B,C,D, 9, 5, 24); md5_Round2(&D,A,B,C, 14, 9, 25); md5_Round2(&C,D,A,B, 3, 14, 26); md5_Round2(&B,C,D,A, 8, 20, 27);
+ md5_Round2(&A,B,C,D, 13, 5, 28); md5_Round2(&D,A,B,C, 2, 9, 29); md5_Round2(&C,D,A,B, 7, 14, 30); md5_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);
+ md5_Round3(&A,B,C,D, 5, 4, 32); md5_Round3(&D,A,B,C, 8, 11, 33); md5_Round3(&C,D,A,B, 11, 16, 34); md5_Round3(&B,C,D,A, 14, 23, 35);
+ md5_Round3(&A,B,C,D, 1, 4, 36); md5_Round3(&D,A,B,C, 4, 11, 37); md5_Round3(&C,D,A,B, 7, 16, 38); md5_Round3(&B,C,D,A, 10, 23, 39);
+ md5_Round3(&A,B,C,D, 13, 4, 40); md5_Round3(&D,A,B,C, 0, 11, 41); md5_Round3(&C,D,A,B, 3, 16, 42); md5_Round3(&B,C,D,A, 6, 23, 43);
+ md5_Round3(&A,B,C,D, 9, 4, 44); md5_Round3(&D,A,B,C, 12, 11, 45); md5_Round3(&C,D,A,B, 15, 16, 46); md5_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);
+ md5_Round4(&A,B,C,D, 0, 6, 48); md5_Round4(&D,A,B,C, 7, 10, 49); md5_Round4(&C,D,A,B, 14, 15, 50); md5_Round4(&B,C,D,A, 5, 21, 51);
+ md5_Round4(&A,B,C,D, 12, 6, 52); md5_Round4(&D,A,B,C, 3, 10, 53); md5_Round4(&C,D,A,B, 10, 15, 54); md5_Round4(&B,C,D,A, 1, 21, 55);
+ md5_Round4(&A,B,C,D, 8, 6, 56); md5_Round4(&D,A,B,C, 15, 10, 57); md5_Round4(&C,D,A,B, 6, 15, 58); md5_Round4(&B,C,D,A, 13, 21, 59);
+ md5_Round4(&A,B,C,D, 4, 6, 60); md5_Round4(&D,A,B,C, 11, 10, 61); md5_Round4(&C,D,A,B, 2, 15, 62); md5_Round4(&B,C,D,A, 9, 21, 63);
// Then perform the following additions. (let's add)
*A2 = A + AA;
@@ -167,7 +167,8 @@ static void MD5_Round_Calculate(const unsigned char *block,
memset(pX, 0, sizeof(X));
}
-static void MD5_String2binary(const char * string, unsigned char * output)
+/// @copydoc md5_interface::binary()
+static void md5_string2binary(const char *string, unsigned char *output)
{
//var
/*8bit*/
@@ -199,7 +200,7 @@ static void MD5_String2binary(const char * string, unsigned char * output)
//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);
+ md5_Round_Calculate(pstring, A,B,C,D);
//1-3
copy_len = string_byte_len % 64; //The number of bytes which remained is computed.
@@ -210,7 +211,7 @@ static void MD5_String2binary(const char * string, unsigned char * output)
//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);
+ md5_Round_Calculate(padding_message, A,B,C,D);
memset(padding_message, 0, 56); //56 bytes is newly fill uped with 0.
}
@@ -222,24 +223,25 @@ static void MD5_String2binary(const char * string, unsigned char * output)
if (UINT_MAX / 8 < string_byte_len) {
unsigned int high = (string_byte_len - UINT_MAX / 8) * 8;
memcpy(&padding_message[60], &high, 4);
- } else
+ } 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);
+ 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 character sequence in the character sequence which wants to code string. */
-void MD5_String(const char *string, char *output)
+/// @copydoc md5_interface::string()
+void md5_string(const char *string, char *output)
{
unsigned char digest[16];
+ nullpo_retv(string);
+ nullpo_retv(output);
+
md5->binary(string,digest);
snprintf(output, 33, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
digest[ 0], digest[ 1], digest[ 2], digest[ 3],
@@ -248,19 +250,24 @@ void MD5_String(const char *string, char *output)
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)
+/// @copydoc md5_interface::salt();
+void md5_salt(int len, char *output)
{
- unsigned int i;
- for( i = 0; i < len; ++i )
+ int i;
+ Assert_retv(len > 0);
+
+ for (i = 0; i < len; ++i)
output[i] = (char)(1 + rnd() % 255);
}
+/**
+ * Interface base initialization.
+ */
void md5_defaults(void)
{
md5 = &md5_s;
- md5->binary = MD5_String2binary;
- md5->string = MD5_String;
- md5->salt = MD5_Salt;
+ md5->binary = md5_string2binary;
+ md5->string = md5_string;
+ md5->salt = md5_salt;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-15 11:10:17 +0000