OpenSSL compilation errors in Windows

Nagalakshmi V J nagalakshmi.j at
Wed Oct 30 13:02:06 UTC 2019

Hi Matt,

Any inputs on the below query?

Thanks and regards,

From: Nagalakshmi V J
Sent: Tuesday, October 29, 2019 5:25 PM
To: Matt Caswell <matt at>; Nagalakshmi V J <nagalakshmi.j at>; openssl-users at
Subject: Re: OpenSSL compilation errors in Windows

Hi Matt,

Thank you so much for your response. Those mentioned APIs resolved my errors.

For the below code,

 return  SSL_get_session(pConnection) != NULL &&
                pConnection->session->session_id_length != 0;

Any reference for accessing session_id_length?

Not sure if I can use the above link.

Thanks & Regards,
Nagalakshmi V J
From: Matt Caswell <matt at<mailto:matt at>>
Sent: 29 October 2019 10:47
To: Nagalakshmi V J <nagalakshmi.j at<mailto:nagalakshmi.j at>>; openssl-users at<mailto:openssl-users at> <openssl-users at<mailto:openssl-users at>>
Subject: Re: OpenSSL compilation errors in Windows

** This mail has been sent from an external source **

On 29/10/2019 10:34, Nagalakshmi V J wrote:
> tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
>          pGenerator->master_secret,sizeof(pGenerator->master_secret),
>          km,tmp,num);

It seems your code is replicating parts of libssl - which seems like a
strange (and possibly dangerous) thing to do!

> Struct ssl_ctx_st {
> ...
> constEVP_MD *md5;          /* For SSLv3/TLSv1 'ssl3-md5' */
> constEVP_MD *sha1;         /* For SSLv3/TLSv1 'ssl3->sha1' */
> ...
> }

You really don't need to access these things. They're just cached
references to the value returned by EVP_get_digestbyname("ssl3-md5") and
EVP_get_digestbyname("ssl3-sha1"). So you can call those functions
directly anyway.

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