GLBasic forum

Hi All,

Is there a way to generate md5 hash from a string within GLBasic? I need a cross-platform solution (it has to work on iPhone too), so an inline code would be great!

Thank you ALL,

Adaz

Is there a special reason why you want to use the outdated and already broken MD5 algorithm? In case something from the more modern SHA-2 family will do the job too: www.glbasic.com/forum/index.php?topic=3833.msg73359#msg73359

Thanks, but a 3rd-hosted php script uses MD5, and I have to provide md5 for them.

I had thought someone had done a routine for MD5, but unfortunately it looks like I was wrong -  no-one has done a routine.

I think there is md5 in Android Extras but not sure about iOS

Android Extras have a hash values (which is here all code in glbasic, and can been found in StoreKit). Howover its not a md5 string, but returns a value based on the string.

here is the functionused for storekit (which worked for both iOS and AE):

INLINE
#define min(a,b) (a<b ? a : b)
ENDINLINE

INLINE
}
#ifdef WIN32
extern "C" __stdcall int SetWindowTextA(void*, const char*);
#endif
#if defined( LINUX) || defined (MACOSX)
extern "C" void SDL_WM_SetCaption  (const char *title, const char *icon);
#endif
namespace __GLBASIC__{
ENDINLINE


FUNCTION HashNumber%:text$
INLINE
long result,temp,counter;

result=0;
for (counter=0; counter<text_Str.len(); counter++)
{
result=(result<<4)+((char) text_Str[counter]);
temp=result & 0xF000;
if (temp)
{
result=result^(temp>>12);
}

result=(result & (temp^0xFFFF)) & 0xFFFF;

}

return result;
ENDINLINE
ENDFUNCTION

FUNCTION HashNumberBig%:text$
INLINE
long result,temp,counter;

result=0;
for (counter=0; counter<text_Str.len(); counter++)
{
result=(result<<6)+((char) text_Str[counter]);
temp=result & 0xF00000;
if (temp)
{
result=result^(temp>>24);
}

result=(result & (temp^0xFFFFFF)) & 0xFFFFFF;

}

return result;
ENDINLINE
ENDFUNCTION


Thanks Guys, but I really needed an md5 function.

In the meantime I have developed a solution for iOS / Xcode, so I will answer my own question now - for others.
It works for me flawlessly!


Open your Xcode project, and insert this line in the beginning of inapp.mm:


#import <CommonCrypto/CommonDigest.h>



Insert these lines after #pragma mark GLB:


- (NSString *) _glb_md5:(NSString *) input {
    const char *cStr = [input UTF8String];
    unsigned char digest[CC_MD5_DIGEST_LENGTH];
    CC_MD5( cStr, strlen(cStr), digest ); // This is the md5 call
   
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
   
    for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
        [output appendFormat:@"%02x", digest[i]];
   
    return  output;
}



Insert these lines after extern "C" {


    char g_data[2048];
    char* glb_md5(char* text) {
    temp_string = [my_inapp _glb_md5: [NSString stringWithUTF8String:text]];
g_data[0]='\0';
strcpy(g_data, [temp_string UTF8String]);
return g_data;
    }



After that you can call this glb_md5 function from GLBasic - if you declare it in your GLBasic project:


?IFDEF IPHONE
        IMPORT "C" char* glb_md5(const char* text)
?ELSE
        FUNCTION glb_md5: text                  //glb_md5 won't work on Windows!! That's an XCode function! So you need this dummy function to be able to run your app on Windows without md5.
        ENDFUNCTION
?ENDIF


its will not been compatible with Android Extras, that is why im diddent do implement a real md5, but instead just returns a simple HASH integer value returned for each item if purchased or not, based on the internal SKU. So im cannot implement this one on my StoreKit, even its a nice code.

It should be fairly easy for someone to implement a "proper" version...