Re: [Python-Dev] PEP476: Enabling certificate validation by default

2014年9月21日 03:59:36 -0700

On 21.09.2014 01:03, Nick Coghlan wrote:
> We may also need some clarification from Ned regarding the status of
> OpenSSL and the potential impact switching from dynamic linking to
> static linking of OpenSSL may have in terms of the
> "OPENSSL_X509_TEA_DISABLE" setting.
You may want to ask Hynek, too. He initially discovered the issue and
made me aware how Apple is tying keychain into OpenSSL. You may find the
code in:
http://opensource.apple.com/source/OpenSSL098/OpenSSL098-35.1/src/crypto/x509/x509_vfy_apple.h
http://opensource.apple.com/source/OpenSSL098/OpenSSL098-35.1/src/crypto/x509/x509_vfy_apple.c
The TEA (Trust Evaluation Agent) switch is global and affects all SSL
context instances. There is non canonical way to set the TEA flag for a
single context or socket.
/* -1: not set
 * 0: set to false
 * 1: set to true
 */
static tea_enabled = -1;
void
X509_TEA_set_state(int change)
{
 tea_enabled = (change) ? 1 : 0;
}
int
X509_TEA_is_enabled()
{
 if (tea_enabled < 0)
 tea_enabled = (NULL == getenv(X509_TEA_ENV_DISABLE));
 return tea_enabled != 0;
}
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