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gensec: Add a check if a gensec module implements weak crypto

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Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andreas Schneider 2019-12-11 17:45:39 +01:00 committed by Andrew Bartlett
parent 7d09c1cc87
commit 6ada071d62
2 changed files with 13 additions and 1 deletions
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1
auth/gensec/gensec_internal.h
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@ -28,6 +28,7 @@ struct gensec_security;
struct gensec_security_ops {
const char *name;
const char *sasl_name;
bool weak_crypto;
uint8_t auth_type; /* 0 if not offered on DCE-RPC */
const char **oid; /* NULL if not offered by SPNEGO */
NTSTATUS (*client_start)(struct gensec_security *gensec_security);

13
auth/gensec/gensec_start.c
View File

@ -32,6 +32,7 @@
#include "lib/util/tsort.h"
#include "lib/util/samba_modules.h"
#include "lib/util/base64.h"
#include "lib/crypto/gnutls_helpers.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
@ -49,7 +50,17 @@ _PUBLIC_ const struct gensec_security_ops * const *gensec_security_all(void)
bool gensec_security_ops_enabled(const struct gensec_security_ops *ops, struct gensec_security *security)
{
return lpcfg_parm_bool(security->settings->lp_ctx, NULL, "gensec", ops->name, ops->enabled);
bool ok = lpcfg_parm_bool(security->settings->lp_ctx,
NULL,
"gensec",
ops->name,
ops->enabled);
if (!samba_gnutls_weak_crypto_allowed() && ops->weak_crypto) {
ok = false;
}
return ok;
}
/* Sometimes we want to force only kerberos, sometimes we want to