In message <[EMAIL PROTECTED]> on Wed, 23 Mar 2005 08:49:22 -0500, Chris
Lalancette <[EMAIL PROTECTED]> said:
clalancette> Hello there,
clalancette> I have a question about using OpenSSL that I haven't
clalancette> been able to find an answer to on Google. I thought I
clalancette> would ask here. Here is my simple program:
clalancette>
clalancette> #include <stdio.h>
clalancette> #include <stdlib.h>
clalancette> #include <openssl/bio.h>
clalancette> #include <openssl/evp.h>
clalancette>
clalancette> int main()
clalancette> {
clalancette> BIO *mbio;
clalancette>
clalancette> mbio=BIO_new(BIO_s_mem());
clalancette>
clalancette> BIO_free(mbio);
clalancette>
clalancette> return 0;
clalancette> }
No internal cleanup is performed. One of the following should help:
CRYPTO_cleanup_all_ex_data();
ERR_remove_state(0);
The "leak" is otherwise a false alarm. If you have increasing memory
usage after a number of BIO_new()/BIO_free() pairs, then you can talk
about a leak.
clalancette> Three possibilities occur to me:
clalancette> 1. I am misusing the OpenSSL library (this is the most
clalancette> likely case).
clalancette> 2. Valgrind is mis-reporting what is going on with
clalancette> OpenSSL (although a good tool, I have found that
clalancette> valgrind is not always correct).
clalancette> 3. There actually is a memory leak in OpenSSL.
I'd guess at 1. One could also say 3, but that would be a memory leak
in your program rather than in OpenSSL :-).
I suggest you take a quick look at the definition of app_shutdown() in
apps.apps.h, it's a good pointer to what kind of cleanup is needed
when you make use of all of the OpenSSL libraries.
Cheers,
Richard
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Richard Levitte [EMAIL PROTECTED]
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