Re: md5 hashing on GNUstep

[H. Nikolaus Schaller]

> Am 01.04.2020 um 19:43 schrieb Andreas Höschler <ahoesch@smartsoft.de>:
> 
> Hi all,
> 
> I have the following NSString category 
> 
>   @implementation NSString (NSStringJsonExtension)
>   
>   - (NSString *)md5
>     {
>      #ifdef __APPLE__
>      const char *cStr = [self UTF8String];
>      unsigned char result[CC_MD5_DIGEST_LENGTH];
>      CC_MD5( cStr, (int)strlen(cStr), result ); // This is the md5 call
>      return [NSString stringWithFormat:
>      @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
>      result[0], result[1], result[2], result[3], 
>      result[4], result[5], result[6], result[7],
>      result[8], result[9], result[10], result[11],
>      result[12], result[13], result[14], result[15]
>      ];  
>      #else
>      NSLog(@"md5 not yet supported on GNUstep. Please implement");

https://linux.die.net/man/3/md5_init

maybe
        unsigned char *MD5(cStr, strlen(cStr), result);

You need to install openssl devel packages.


>      return nil;
>      #endif
>     }
> 
> @end
> 
> working on MacOSX (neede to access HkVision cameras). 
> 
> I would like to port this app to GNUstep and therefore need code that builds 
> on Ubuntu (current GNUstep tree). The above code gives
> 
> SRHTTPRequest.m:93:27: error: 'CC_MD5_DIGEST_LENGTH' undeclared (first use in 
> this function)
>       unsigned char result[CC_MD5_DIGEST_LENGTH];
>                            ^
> SRHTTPRequest.m:93:27: note: each undeclared identifier is reported only once 
> for each function it appears in
> SRHTTPRequest.m:94:6: warning: implicit declaration of function 'CC_MD5' 
> [-Wimplicit-function-declaration]
>       CC_MD5( cStr, (int)strlen(cStr), result ); // This is the md5 call
>       ^
> Any idea how to do md5 hashing on Linux/GNUstep?
> 
> Thanks a lot in advance!
> 
> Andreas
> 
> 
>