SSL_connect error with openSSL 1.1.1

[Samiya Khanum]

Hi All,

I am trying to connect to* "smtp.gmail.com <http://smtp.gmail.com>"* with
port *"465".*

With OpenSSL 1.0.2p, I don't see any issue. SSL_connect is always
successful. Method used is TLSv1_method.

But with the openSSL to 1.1.1m and OpenSSL 3.0.7, I am seeing below errors.

*SSL_connect err = error:00000005:lib(0):func(0):DH lib*
*                           (or)*
*SSL_connect err = error:00000005:lib(0)::reason(5)*
*                          (or)*

*SSL_connect err = error:00000001:lib(0):func(0):reason(1)*

Here I am using the TLS_method.
Do we need to set anything before the SSL_connect call? Am I missing
something? Please advise.

Surprisingly it worked 2/20 times.
Can we print detailed information about errors/ debugs with any SSL set
call? Please let me know.

*Below is the code for TLS connection:*

 *ctx=SSL_CTX_new(TLS_method());*
* if (ctx == NULL)*
* {*
*    SocketClose(sd);*
*    return FAILURE;*
*  }*

*  con=SSL_new(ctx);*
*  if(con == NULL)*
*  {*
*    SSL_CTX_free(ctx);*
*    SocketClose(sd);*
*    return FAILURE;*
*  }*

*  SSL_set_fd (con, sd);*

*  err = SSL_connect(con);*
*  if(err == -1)*
*  {*
     err2 = SSL_get_error(con, err);
     printf("\r\nSSL_connect err = %s", ERR_error_string(err2, 0));
    * SSL_shutdown(con);*
*    SSL_free(con);*
*    SocketClose(sd);*
*    return FAILURE;*
*  }*

*   printf("TLS CONNECTION IS SUCCESSFUL");*
*   /* Data send and receive */*

*   /* Close the connection */*
*   if (con != NULL)*
*   {*
     *SSL_shutdown(con);*
*     SSL_free(con);*
     *SocketClose(sd);*
*   }*

Thanks in advance.

Thanks & Regards,
Samiya khanum

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