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Allow TLS flags to be configured (allow MD5, disable time checks)

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Undocumented (at least for the time being) TLS parameters can now
be provided in wpa_supplicant configuration to enable some workarounds
for being able to connect insecurely to some networks. phase1 and
phase2 network parameters can use following options:
tls_allow_md5=1
- allow MD5 signature to be used (disabled by default with GnuTLS)
tls_disable_time_checks=1
- ignore certificate expiration time

For now, only the GnuTLS TLS wrapper implements support for these.
This commit is contained in:
Jouni Malinen 2009-12-20 19:28:47 +02:00
parent 4a1e97790d
commit 2944656925
3 changed files with 43 additions and 0 deletions
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6
src/crypto/tls.h
View file

@ -35,6 +35,9 @@ struct tls_config {
int fips_mode;
};
#define TLS_CONN_ALLOW_SIGN_RSA_MD5 BIT(0)
#define TLS_CONN_DISABLE_TIME_CHECKS BIT(1)
/**
* struct tls_connection_params - Parameters for TLS connection
* @ca_cert: File or reference name for CA X.509 certificate in PEM or DER
@ -69,6 +72,7 @@ struct tls_config {
* @cert_id: the certificate's id when using engine
* @ca_cert_id: the CA certificate's id when using engine
* @tls_ia: Whether to enable TLS/IA (for EAP-TTLSv1)
* @flags: Parameter options (TLS_CONN_*)
*
* TLS connection parameters to be configured with tls_connection_set_params()
* and tls_global_set_params().
@ -104,6 +108,8 @@ struct tls_connection_params {
const char *key_id;
const char *cert_id;
const char *ca_cert_id;
unsigned int flags;
};

23
src/crypto/tls_gnutls.c
View file

@ -591,6 +591,17 @@ int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
return -1;
}
}
if (params->flags & TLS_CONN_ALLOW_SIGN_RSA_MD5) {
gnutls_certificate_set_verify_flags(
conn->xcred, GNUTLS_VERIFY_ALLOW_SIGN_RSA_MD5);
}
if (params->flags & TLS_CONN_DISABLE_TIME_CHECKS) {
gnutls_certificate_set_verify_flags(
conn->xcred,
GNUTLS_VERIFY_DISABLE_TIME_CHECKS);
}
}
if (params->client_cert && params->private_key) {
@ -711,6 +722,18 @@ int tls_global_set_params(void *tls_ctx,
goto fail;
}
}
if (params->flags & TLS_CONN_ALLOW_SIGN_RSA_MD5) {
gnutls_certificate_set_verify_flags(
global->xcred,
GNUTLS_VERIFY_ALLOW_SIGN_RSA_MD5);
}
if (params->flags & TLS_CONN_DISABLE_TIME_CHECKS) {
gnutls_certificate_set_verify_flags(
global->xcred,
GNUTLS_VERIFY_DISABLE_TIME_CHECKS);
}
}
if (params->client_cert && params->private_key) {

14
src/eap_peer/eap_tls_common.c
View file

@ -45,6 +45,18 @@ static int eap_tls_check_blob(struct eap_sm *sm, const char **name,
}
static void eap_tls_params_flags(struct tls_connection_params *params,
const char *txt)
{
if (txt == NULL)
return;
if (os_strstr(txt, "tls_allow_md5=1"))
params->flags |= TLS_CONN_ALLOW_SIGN_RSA_MD5;
if (os_strstr(txt, "tls_disable_time_checks=1"))
params->flags |= TLS_CONN_DISABLE_TIME_CHECKS;
}
static void eap_tls_params_from_conf1(struct tls_connection_params *params,
struct eap_peer_config *config)
{
@ -62,6 +74,7 @@ static void eap_tls_params_from_conf1(struct tls_connection_params *params,
params->key_id = config->key_id;
params->cert_id = config->cert_id;
params->ca_cert_id = config->ca_cert_id;
eap_tls_params_flags(params, config->phase1);
}
@ -82,6 +95,7 @@ static void eap_tls_params_from_conf2(struct tls_connection_params *params,
params->key_id = config->key2_id;
params->cert_id = config->cert2_id;
params->ca_cert_id = config->ca_cert2_id;
eap_tls_params_flags(params, config->phase2);
}