On 5. 2. 2011 16:31, lu_hernan wrote:
Thank you for answering.
The file does not include any CR or LF but I have noticed that is saved in
UTF-8. Does it has anything to do with the problem?
Maybe. Some UTF-8 files can contain a Byte Order Mark (or BOM) which
consists of 3 bytes at the very beginning of the file. Most editors
don't show them up but you can clearly see them when looking at the file
in a hex-editor.
If I read the file with a program with the code below the result is the same
as the command line but, if I take the content of a file and put it in const
unsigned char data[] it does not.
My program will generate a string that has to be signed (md5 and RSA key).
Which method will assure that I have a valid signed string:
Write that string to a file and read it back to sign it?
Or pass the string as an argument to a function and sign it? ( this is I
would like to do but digest is different)
TIA
Luis Hernandez
Dave Thompson-5 wrote:
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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______________________________________________________________________
OpenSSL Project http://www.openssl.org
User Support Mailing List openssl-users@openssl.org
Automated List Manager majord...@openssl.org
