First, if you pasted your original code into the email, then you have several typos.
Second, two of the lines generate warnings on compilation about incompatible pointer types - these are significant. The lines are: num_byte = BN_dec2bn(dh_struct->p,str_p); num_byte = BN_dec2bn(dh_struct->g,str_g); //Note this was a line with a typo Try it with these lines as follows: num_byte = BN_dec2bn(&(dh_struct->p),str_p); num_byte = BN_dec2bn(&(dh_struct->g),str_g); When I did (plus fixing the other typo) and printed the results, I got: Num Bytes for p=5 Num Bytes for g=1 Return code from generate key=1 Bill ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Agustin Cozzetti Sent: December 14, 2007 5:30 AM To: openssl-users@openssl.org Subject: Doubt about the use and initialization of DH struct From: [EMAIL PROTECTED] To: openssl-users@openssl.org Subject: Doubt about the use and initialization of DH struct Date: Fri, 14 Dec 2007 10:23:19 +0000 Hello, I have a problem with DH struct in my source code C. Here a small list of my code: #include <stdio.h> #include <stdlib.h> #include <openssl/dh.h> #include <openssl/engine.h> #include <openssl/bn.h> DH *dh_struct; int main() { unsigned char str_p[] = "57503"; unsigned char str_g[] = "5"; unsigned char *string; int num_byte,size,i; dh_struct = DH_new(); dh_struct->p = BN_new(); dh_struct->g = BN_new(); dh_struct->priv_key = BN_new(); dh_struct->pub_key = BN_new(); num_byte = BN_dec2bn(dh_struct->p,str_p); // Here it seems that not execute anything about structure "dh_struct->p"....why??? num_byte = BN_dec2bn(dh_struct->p,str_g); size = BN_num_bytes(dh_struct->p); // Here,the result is zero...why??? string = BN_bn2dec(dh_struct->p); // TEST,but string is NULL...why??? i=DH_generate_ket(dh_struct); // return 0,operation failed..... } I can not understand where I mistake in the code! Thank you for your help, Hector Agustin Cozzetti ________________________________ Per questo Natale fai i tuoi auguri con Messenger! Windows Live Messenger <http://www.augurimessenger.it>