> From: owner-openssl-us...@openssl.org On Behalf Of lu_hernan
> Sent: Friday, 04 February, 2011 19:14
> openssl dgst -md5 sometextdata.txt
>
> it gives an answer XYZ
>
> but using this code en visual c++:
> const unsigned char data[]="text from file: sometextdata.txt";
> unsigned char md[MD5_DIGEST_LENGTH];
> MD5(data, strlen(data), md);
>
> it gives ABC as result.
>
Make sure the data is exactly byte-for-byte the same.
In particular, does the file have a CR-LF, or maybe just LF,
at the end? My ancient MSVC++6 (circa 1998) has an option
on File / Open: OpenAs=Binary . If that or something similar
is available, it should show exactly what's in the file.
If not do a simple program like:
#include <stdio.h>
int main(void){
FILE * fp = fopen ("sometextdata.txt", "rb"); /* b matters on Win */
unsigned char buff[99999]; int i, n = fread (buff,1,sizeof buff, fp);
for( i = 0; i < n; i++ ) printf ("%c%02X", " \n"[!(i&0xF)], buff[i]);
printf ("\n"); fclose (fp); return 0; }
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