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GnuTLS: Fix DER encoding certificate parsing

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It looks like GnuTLS may return success on
gnutls_certificate_set_x509_*() functions with GNUTLS_X509_FMT_PEM even
when trying to read DER encoded information. Reverse the order of
parsing attempts so that we start with DER and then move to PEM if
GnuTLS reports failure on DER parsing. This seems to be more reliable
way of getting errors reported and both cases can now be handled.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-01-11 16:57:26 +02:00
parent 3b51cc6359
commit 79b1dd9aad
1 changed files with 27 additions and 24 deletions
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51
src/crypto/tls_gnutls.c
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@ -366,18 +366,21 @@ int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
* to force peer validation(?) */
if (params->ca_cert) {
wpa_printf(MSG_DEBUG, "GnuTLS: Try to parse %s in DER format",
params->ca_cert);
ret = gnutls_certificate_set_x509_trust_file(
conn->xcred, params->ca_cert, GNUTLS_X509_FMT_PEM);
conn->xcred, params->ca_cert, GNUTLS_X509_FMT_DER);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read CA cert '%s' "
"in PEM format: %s", params->ca_cert,
wpa_printf(MSG_DEBUG,
"GnuTLS: Failed to read CA cert '%s' in DER format (%s) - try in PEM format",
params->ca_cert,
gnutls_strerror(ret));
ret = gnutls_certificate_set_x509_trust_file(
conn->xcred, params->ca_cert,
GNUTLS_X509_FMT_DER);
GNUTLS_X509_FMT_PEM);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read CA cert "
"'%s' in DER format: %s",
wpa_printf(MSG_DEBUG,
"Failed to read CA cert '%s' in PEM format: %s",
params->ca_cert,
gnutls_strerror(ret));
return -1;
@ -390,16 +393,16 @@ int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
ca.size = params->ca_cert_blob_len;
ret = gnutls_certificate_set_x509_trust_mem(
conn->xcred, &ca, GNUTLS_X509_FMT_PEM);
conn->xcred, &ca, GNUTLS_X509_FMT_DER);
if (ret < 0) {
wpa_printf(MSG_DEBUG,
"Failed to parse CA cert in PEM format: %s",
"Failed to parse CA cert in DER format: %s",
gnutls_strerror(ret));
ret = gnutls_certificate_set_x509_trust_mem(
conn->xcred, &ca, GNUTLS_X509_FMT_DER);
conn->xcred, &ca, GNUTLS_X509_FMT_PEM);
if (ret < 0) {
wpa_printf(MSG_DEBUG,
"Failed to parse CA cert in DER format: %s",
"Failed to parse CA cert in PEM format: %s",
gnutls_strerror(ret));
return -1;
}
@ -430,29 +433,29 @@ int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
#if GNUTLS_VERSION_NUMBER >= 0x03010b
ret = gnutls_certificate_set_x509_key_file2(
conn->xcred, params->client_cert, params->private_key,
GNUTLS_X509_FMT_PEM, params->private_key_passwd, 0);
GNUTLS_X509_FMT_DER, params->private_key_passwd, 0);
#else
/* private_key_passwd not (easily) supported here */
ret = gnutls_certificate_set_x509_key_file(
conn->xcred, params->client_cert, params->private_key,
GNUTLS_X509_FMT_PEM);
GNUTLS_X509_FMT_DER);
#endif
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read client cert/key "
"in PEM format: %s", gnutls_strerror(ret));
"in DER format: %s", gnutls_strerror(ret));
#if GNUTLS_VERSION_NUMBER >= 0x03010b
ret = gnutls_certificate_set_x509_key_file2(
conn->xcred, params->client_cert,
params->private_key, GNUTLS_X509_FMT_DER,
params->private_key, GNUTLS_X509_FMT_PEM,
params->private_key_passwd, 0);
#else
ret = gnutls_certificate_set_x509_key_file(
conn->xcred, params->client_cert,
params->private_key, GNUTLS_X509_FMT_DER);
params->private_key, GNUTLS_X509_FMT_PEM);
#endif
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read client "
"cert/key in DER format: %s",
"cert/key in PEM format: %s",
gnutls_strerror(ret));
return ret;
}
@ -516,17 +519,17 @@ int tls_global_set_params(void *tls_ctx,
if (params->ca_cert) {
ret = gnutls_certificate_set_x509_trust_file(
global->xcred, params->ca_cert, GNUTLS_X509_FMT_PEM);
global->xcred, params->ca_cert, GNUTLS_X509_FMT_DER);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read CA cert '%s' "
"in PEM format: %s", params->ca_cert,
"in DER format: %s", params->ca_cert,
gnutls_strerror(ret));
ret = gnutls_certificate_set_x509_trust_file(
global->xcred, params->ca_cert,
GNUTLS_X509_FMT_DER);
GNUTLS_X509_FMT_PEM);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read CA cert "
"'%s' in DER format: %s",
"'%s' in PEM format: %s",
params->ca_cert,
gnutls_strerror(ret));
goto fail;
@ -550,16 +553,16 @@ int tls_global_set_params(void *tls_ctx,
/* TODO: private_key_passwd? */
ret = gnutls_certificate_set_x509_key_file(
global->xcred, params->client_cert,
params->private_key, GNUTLS_X509_FMT_PEM);
params->private_key, GNUTLS_X509_FMT_DER);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read client cert/key "
"in PEM format: %s", gnutls_strerror(ret));
"in DER format: %s", gnutls_strerror(ret));
ret = gnutls_certificate_set_x509_key_file(
global->xcred, params->client_cert,
params->private_key, GNUTLS_X509_FMT_DER);
params->private_key, GNUTLS_X509_FMT_PEM);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "Failed to read client "
"cert/key in DER format: %s",
"cert/key in PEM format: %s",
gnutls_strerror(ret));
goto fail;
}