C code, MD5 hash, if statements assistance

Code:

#include <stdio.h> #include <stdlib.h> #include <string.h> int main(void) { /* set variables / array */ char MAC[13]; char MACHashed; char WPAkey1; /* this will be fed from the iphone wifi card*/ printf( "Please enter MAC with no colons: " ); fgets ( MAC, 13, stdin ); /* MAC need to be MD5 hashed and puit into MACHashed variable*/ MACHashed = "572E74CDF761D0E4038509919CD8AF1A"; /*this is MD5 has of 001122334455 */ if (MACHashed[1] == "5"); WPAkey1 = E; /* this outputs the WPA key*/ printf("%c", WPAkey1); getchar(); return(0);

I am looking to take a user input (12 characters) MD5 hash it and then split this into 16 2 charcater segments (can an array do 2 characters at a time?)

Once I have the 16 segments, run if statments as follows so that the each of the 16 segments now turns into a Letter, i.e. if the first 2 characters of hte hash are 0F the letter woudl be P:-

Code:

if %array%==00 A if %array%==01 B if %array%==02 C if %array%==03 D if %array%==04 E if %array%==05 F if %array%==06 G if %array%==07 H if %array%==08 I if %array%==09 J if %array%==0A K if %array%==0B L if %array%==0C M if %array%==0D N if %array%==0E O if %array%==0F P if %array%==10 Q if %array%==11 R if %array%==12 S if %array%==13 T if %array%==14 U if %array%==15 V if %array%==16 W if %array%==17 X if %array%==18 Y if %array%==19 Z if %array%==1A A if %array%==1B B if %array%==1C C if %array%==1D D if %array%==1E E if %array%==1F F if %array%==20 G if %array%==21 H if %array%==22 I if %array%==23 J if %array%==24 K if %array%==25 L if %array%==26 M if %array%==27 N if %array%==28 O if %array%==29 P if %array%==2A Q if %array%==2B R if %array%==2C S if %array%==2D T if %array%==2E U if %array%==2F V if %array%==30 W if %array%==31 X if %array%==32 Y if %array%==33 Z if %array%==34 A if %array%==35 B if %array%==36 C if %array%==37 D if %array%==38 E if %array%==39 F if %array%==3A G if %array%==3B H if %array%==3C I if %array%==3D J if %array%==3E K if %array%==3F L if %array%==40 M if %array%==41 N if %array%==42 O if %array%==43 P if %array%==44 Q if %array%==45 R if %array%==46 S if %array%==47 T if %array%==48 U if %array%==49 V if %array%==4A W if %array%==4B X if %array%==4C Y if %array%==4D Z if %array%==4E A if %array%==4F B if %array%==50 C if %array%==51 D if %array%==52 E if %array%==53 F if %array%==54 G if %array%==55 H if %array%==56 I if %array%==57 J if %array%==58 K if %array%==59 L if %array%==5A M if %array%==5B N if %array%==5C O if %array%==5D P if %array%==5E Q if %array%==5F R if %array%==60 S if %array%==61 T if %array%==62 U if %array%==63 V if %array%==64 W if %array%==65 X if %array%==66 Y if %array%==67 Z if %array%==68 A if %array%==69 B if %array%==6A C if %array%==6B D if %array%==6C E if %array%==6D F if %array%==6E G if %array%==6F H if %array%==70 I if %array%==71 J if %array%==72 K if %array%==73 L if %array%==74 M if %array%==75 N if %array%==76 O if %array%==77 P if %array%==78 Q if %array%==79 R if %array%==7A S if %array%==7B T if %array%==7C U if %array%==7D V if %array%==7E W if %array%==7F X if %array%==80 Y if %array%==81 Z if %array%==82 A if %array%==83 B if %array%==84 C if %array%==85 D if %array%==86 E if %array%==87 F if %array%==88 G if %array%==89 H if %array%==8A I if %array%==8B J if %array%==8C K if %array%==8D L if %array%==8E M if %array%==8F N if %array%==90 O if %array%==91 P if %array%==92 Q if %array%==93 R if %array%==94 S if %array%==95 T if %array%==96 U if %array%==97 V if %array%==98 W if %array%==99 X if %array%==9A Y if %array%==9B Z if %array%==9C A if %array%==9D B if %array%==9E C if %array%==9F D if %array%==A0 E if %array%==A1 F if %array%==A2 G if %array%==A3 H if %array%==A4 I if %array%==A5 J if %array%==A6 K if %array%==A7 L if %array%==A8 M if %array%==A9 N if %array%==AA O if %array%==AB P if %array%==AC Q if %array%==AD R if %array%==AE S if %array%==AF T if %array%==B0 U if %array%==B1 V if %array%==B2 W if %array%==B3 X if %array%==B4 Y if %array%==B5 Z if %array%==B6 A if %array%==B7 B if %array%==B8 C if %array%==B9 D if %array%==BA E if %array%==BB F if %array%==BC G if %array%==BD H if %array%==BE I if %array%==BF J if %array%==C0 K if %array%==C1 L if %array%==C2 M if %array%==C3 N if %array%==C4 O if %array%==C5 P if %array%==C6 Q if %array%==C7 R if %array%==C8 S if %array%==C9 T if %array%==CA U if %array%==CB V if %array%==CC W if %array%==CD X if %array%==CE Y if %array%==CF Z if %array%==D0 A if %array%==D1 B if %array%==D2 C if %array%==D3 D if %array%==D4 E if %array%==D5 F if %array%==D6 G if %array%==D7 H if %array%==D8 I if %array%==D9 J if %array%==DA K if %array%==DB L if %array%==DC M if %array%==DD N if %array%==DE O if %array%==DF P if %array%==E0 Q if %array%==E1 R if %array%==E2 S if %array%==E3 T if %array%==E4 U if %array%==E5 V if %array%==E6 W if %array%==E7 X if %array%==E8 Y if %array%==E9 Z if %array%==EA A if %array%==EB B if %array%==EC C if %array%==ED D if %array%==EE E if %array%==EF F if %array%==F0 G if %array%==F1 H if %array%==F2 I if %array%==F3 J if %array%==F4 K if %array%==F5 L if %array%==F6 M if %array%==F7 N if %array%==F8 O if %array%==F9 P if %array%==FA Q if %array%==FB R if %array%==FC S if %array%==FD T if %array%==FE U if %array%==FF V

Is this possible, the elements I am stuck on are how to MD5 within C, and how to run an if statment on a concatenated array1 and array2 character?

Thanks for any help...

I would say that you should perhaps learn the C language before you start attempting to mess around with MD5 hashing and the like, because your code is fairly nonsensical. But whatever.
First hit on a Google search of md5 C implementation

Ok I have read alittle more and got so far (see code)

Code:

#include <stdio.h> #include <stdlib.h> #include <string.h> int main(void) { /*search for SKYxxxxx and MD5 hash the MAC address and input this into variable MACHashed*/ const char* MACHashed = "572E74CDF761D0E4038509919CD8AF1A"; /*variables set*/ char *WPAkey1 = (char*) malloc(3); char *WPAkey2 = (char*) malloc(3); char *WPAkey3 = (char*) malloc(3); char *WPAkey4 = (char*) malloc(3); char *WPAkey5 = (char*) malloc(3); char *WPAkey6 = (char*) malloc(3); char *WPAkey7 = (char*) malloc(3); char *WPAkey8 = (char*) malloc(3); char WPAkeya; char WPAkeyb; char WPAkeyc; char WPAkeyd; char WPAkeye; char WPAkeyf; char WPAkeyg; char WPAkeyh; /*set WPAkey characters 1-8 based on MACHashed*/ strncpy(WPAkey1, MACHashed+2, 2); strncpy(WPAkey2, MACHashed+6, 2); strncpy(WPAkey3, MACHashed+10, 2); strncpy(WPAkey4, MACHashed+14, 2); strncpy(WPAkey5, MACHashed+18, 2); strncpy(WPAkey6, MACHashed+22, 2); strncpy(WPAkey7, MACHashed+26, 2); strncpy(WPAkey8, MACHashed+30, 2); /* this outputs the HEX codes*/ printf(WPAkey1);printf("\n");printf(WPAkey2);printf("\n");printf(WPAkey3);printf("\n");printf(

The output has ">" after each HEX code? Why woudl that be?

Any assistance appreciated!!

Because strncpy() does not append a \0 automatically for you.

I tried different combinations to remove the > (\0) from the WPAkey1 etc variables but with no joy....

If strncpy isnt capable of setting a variable from a string without >, is there another command I could utilse?

I need the WPAKey1 etc variables to purely be 2 characters to allow the remaining program to work properly.... thanks for any help....

strncpy(WPAkey1, MACHashed+2, 2);
WPAkey1[2] = '\0';

Is that too much?

Maybe you could create your own my_strncpy_which_appends_a_nul() function.