OpenSSL compilation errors in Windows

[Matt Caswell]

On 29/10/2019 11:55, Nagalakshmi V J wrote:
> 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?
> https://www.openssl.org/docs/man1.1.0/man3/SSL_CTX_set_generate_session_id.html

You should use SSL_SESSION_get_id() to get hold of the length:

https://www.openssl.org/docs/man1.1.1/man3/SSL_SESSION_get_id.html

Matt

> 
> Not sure if I can use the above link.
> 
> 
> /Thanks & Regards,/
> /Nagalakshmi V J/
> ------------------------------------------------------------------------
> *From:* Matt Caswell <matt at openssl.org>
> *Sent:* 29 October 2019 10:47
> *To:* Nagalakshmi V J <nagalakshmi.j at altran.com>;
> openssl-users at openssl.org <openssl-users at openssl.org>
> *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.
> 
> Matt
> 
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