My last mail was break into a lot of parts. Here is the program
fragment who's generate an error.
rsa = RSA_generate_key(1024, RSA_F4, NULL, NULL);
if (rsa == NULL)
{
ERR_print_errors_fp(stderr);
exit(1);
}
if (RSA_check_key(rsa) <= 0)
{
ERR_print_errors_fp(stderr);
exit(1);
}
pvk_len = i2d_RSAPrivateKey(rsa, NULL);
if (pvk_len< 0) exit(1);
pvk_buf = (unsigned char *)malloc(pvk_len*sizeof(unsigned char));
if (pvk_buf == NULL) exit(1);
pvk_len = i2d_RSAPrivateKey(rsa, &pvk_buf);
/* There are some data in pvk_buf, but are corrupted. */
free(pvk_buf);
/* This causes segmentation fault */
I fixed this by:
pvk_len = i2d_RSAPrivateKey(rsa, NULL);
pvk_buf = (unsigned char *)malloc(pvk_len*2*sizeof(unsigned char));
^^^^^
/* need allocate two many size of buffer */
org_pointer_buf = pvk_buf;
pvk_len = i2d_RSAPrivateKey(rsa, &pvk_buf);
/* here is the pvk_buf pointer shifted about pvk_len bytes far from
original position stored in org_pointer_buf (WHY??)
*/
free(org_pointer_buf);
/* freed OK */
Thank you.
George
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