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[curl:bugs] #1290 Client code, ADH, servercert, and NULL certifcate

From: Jeffrey Walton <noloader_at_users.sf.net>
Date: Sun, 13 Oct 2013 20:48:13 +0000

> I don't understand what you're saying.

If key exchange is Anonymous Diffie-Hellman (as opposed to Fixed Diffie-Hellman or Ephemeral Diffie-Hellman), then `server_cert` will be `NULL`. In this case, everything is functioning as expected.

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** [bugs:#1290] Client code, ADH, servercert, and NULL certifcate**
**Status:** open
**Created:** Sun Oct 13, 2013 09:12 AM UTC by Jeffrey Walton
**Last Updated:** Sun Oct 13, 2013 09:15 AM UTC
**Owner:** Daniel Stenberg
    // From ssluse.c, around line 2127
    connssl->server_cert = SSL_get_peer_certificate(connssl->handle);
    if(!connssl->server_cert) {
      if(strict)
        failf(data, "SSL: couldn't get peer certificate!");
      return CURLE_PEER_FAILED_VERIFICATION;
    }
In client code, `SSL_get_peer_certificate` will return `NULL` in the case of ADH *if* the server does not have a certificate to offer. If the user asked for ADH, then the return value might be misleading or even incorrect.
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Received on 2013-10-13

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