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/*
* gsi_socket_voms.c
*
* See gsi_socket.h for documentation.
*/
#include "myproxy_common.h"
#include "gsi_socket_priv.h"
static int
GSI_SOCKET_set_error_string(GSI_SOCKET *self,
char *buffer)
{
if (self->error_string) {
free(self->error_string);
}
self->error_string = strdup(buffer);
return GSI_SOCKET_SUCCESS;
}
static int
add_fqan(char ***fqans, const char *fqan)
{
int current_len;
char **new_fqans;
if (fqans==NULL) {
return GSI_SOCKET_ERROR;
}
current_len = 0;
if (*fqans != NULL) {
while ((*fqans)[current_len] != NULL)
current_len++;
}
new_fqans = realloc(*fqans, (current_len + 2) * sizeof(*new_fqans));
if (new_fqans == NULL) {
return GSI_SOCKET_ERROR;
}
new_fqans[current_len] = strdup(fqan);
new_fqans[current_len+1] = NULL;
*fqans = new_fqans;
return 0;
}
static gss_OID_desc gss_ext_x509_cert_chain_oid_desc =
{11, "\x2b\x06\x01\x04\x01\x9b\x50\x01\x01\x01\x08"};
static gss_OID_desc * gss_ext_x509_cert_chain_oid =
&gss_ext_x509_cert_chain_oid_desc;
static int
GSI_SOCKET_get_peer_cert_chain(GSI_SOCKET *self,
X509 **cert,
STACK_OF(X509) **cert_chain)
{
OM_uint32 major_status = 0;
OM_uint32 minor_status = 0;
gss_buffer_set_t buffer_set = NULL;
int i;
*cert = NULL;
*cert_chain = NULL;
major_status = gss_inquire_sec_context_by_oid(&minor_status,
self->gss_context,
gss_ext_x509_cert_chain_oid,
&buffer_set);
if (major_status != GSS_S_COMPLETE) {
GSI_SOCKET_set_error_string(self, "gsi_inquire_sec_context_by_oid() failed in GSI_SOCKET_get_peer_cert_chain()");
return GSI_SOCKET_ERROR;
}
*cert_chain = sk_X509_new_null();
for (i = 0; i < buffer_set->count; i++) {
const unsigned char *p;
X509 *c;
p = buffer_set->elements[i].value;
c = d2i_X509(NULL, &p, buffer_set->elements[i].length);
if (i == 0) {
*cert = c;
} else {
if (sk_X509_insert(*cert_chain,
c, sk_X509_num(*cert_chain)) == SSL_ERROR) {
GSI_SOCKET_set_error_string(self, "sk_X509_insert() failed in GSI_SOCKET_get_peer_cert_chain()");
gss_release_buffer_set(&minor_status, &buffer_set);
return GSI_SOCKET_ERROR;
}
}
}
gss_release_buffer_set(&minor_status, &buffer_set);
return GSI_SOCKET_SUCCESS;
}
int
GSI_SOCKET_get_peer_fqans(GSI_SOCKET *self, char ***fqans)
{
char **local_fqans = NULL;
int ret;
struct vomsdata *voms_data = NULL;
struct voms **voms_cert = NULL;
char **fqan = NULL;
int voms_err;
char *err_msg, *err_str;
X509 *cert = NULL;
STACK_OF(X509) *cert_chain = NULL;
voms_data = VOMS_Init(NULL, NULL);
if (voms_data == NULL) {
GSI_SOCKET_set_error_string(self,
"Failed to read VOMS attributes, VOMS_Init() failed");
return GSI_SOCKET_ERROR;
}
if (GSI_SOCKET_get_peer_cert_chain(self,
&cert,
&cert_chain) != GSI_SOCKET_SUCCESS) {
GSI_SOCKET_set_error_string(self, "Failed to read VOMS attributes, GSI_SOCKET_get_peer_cert_chain( failed");
return GSI_SOCKET_ERROR;
}
ret = VOMS_Retrieve(cert,
cert_chain,
RECURSE_CHAIN, voms_data, &voms_err);
if (ret == 0) {
if (voms_err == VERR_NOEXT) {
/* No VOMS extensions present, return silently */
ret = 0;
goto end;
} else {
err_msg = VOMS_ErrorMessage(voms_data, voms_err, NULL, 0);
err_str = (char *)malloc(strlen(err_msg)+50);
snprintf(err_str, strlen(err_msg)+50,
"Failed to read VOMS attributes: %s", err_msg);
GSI_SOCKET_set_error_string(self, err_str);
free(err_msg);
free(err_str);
ret = GSI_SOCKET_ERROR;
goto end;
}
}
for (voms_cert = voms_data->data; voms_cert && *voms_cert; voms_cert++) {
for (fqan = (*voms_cert)->fqan; fqan && *fqan; fqan++) {
add_fqan(&local_fqans, *fqan);
}
}
*fqans = local_fqans;
ret = 0;
end:
if (voms_data)
VOMS_Destroy(voms_data);
if (cert)
X509_free(cert);
if (cert_chain)
sk_X509_pop_free(cert_chain, X509_free);
return ret;
}
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