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/* Copyright (C) 2011 the GSS-PROXY contributors, see COPYING for license */
#include "gp_rpc_process.h"
#include <gssapi/gssapi_krb5.h>
int gp_init_sec_context(struct gp_call_ctx *gpcall,
union gp_rpc_arg *arg,
union gp_rpc_res *res)
{
struct gssx_arg_init_sec_context *isca;
struct gssx_res_init_sec_context *iscr;
gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
gss_cred_id_t ich = GSS_C_NO_CREDENTIAL;
gss_name_t target_name = GSS_C_NO_NAME;
gss_OID mech_type = GSS_C_NO_OID;
uint32_t req_flags;
uint32_t time_req;
struct gss_channel_bindings_struct cbs;
gss_channel_bindings_t pcbs;
gss_buffer_desc ibuf = { 0, NULL };
gss_buffer_t pibuf = &ibuf;
gss_OID actual_mech_type = GSS_C_NO_OID;
gss_buffer_desc obuf = GSS_C_EMPTY_BUFFER;
uint32_t ret_maj;
uint32_t ret_min;
uint32_t init_maj;
uint32_t init_min;
int exp_ctx_type;
int ret;
isca = &arg->init_sec_context;
iscr = &res->init_sec_context;
GPRPCDEBUG(gssx_arg_init_sec_context, isca);
exp_ctx_type = gp_get_exported_context_type(&isca->call_ctx);
if (exp_ctx_type == -1) {
ret_maj = GSS_S_FAILURE;
ret_min = EINVAL;
goto done;
}
if (isca->context_handle) {
ret_maj = gp_import_gssx_to_ctx_id(&ret_min, 0,
isca->context_handle, &ctx);
if (ret_maj) {
goto done;
}
}
if (isca->cred_handle) {
ret_maj = gp_import_gssx_cred(&ret_min, gpcall,
isca->cred_handle, &ich);
if (ret_maj) {
goto done;
}
}
ret_maj = gp_conv_gssx_to_name(&ret_min, isca->target_name, &target_name);
if (ret_maj) {
goto done;
}
ret = gp_conv_gssx_to_oid_alloc(&isca->mech_type, &mech_type);
if (ret) {
ret_maj = GSS_S_FAILURE;
ret_min = ret;
goto done;
}
req_flags = isca->req_flags;
time_req = isca->time_req;
if (isca->input_cb) {
pcbs = &cbs;
gp_conv_gssx_to_cb(isca->input_cb, pcbs);
} else {
pcbs = GSS_C_NO_CHANNEL_BINDINGS;
}
if (isca->input_token) {
gp_conv_gssx_to_buffer(isca->input_token, &ibuf);
}
if (!isca->cred_handle) {
if (gss_oid_equal(mech_type, gss_mech_krb5)) {
ret_maj = gp_add_krb5_creds(&ret_min, gpcall,
NULL, NULL,
GSS_C_INITIATE,
time_req, 0, &ich,
NULL, NULL, NULL);
} else {
ret_maj = GSS_S_NO_CRED;
ret_min = 0;
}
if (ret_maj) {
goto done;
}
}
gp_filter_flags(gpcall, &req_flags);
ret_maj = gss_init_sec_context(&ret_min,
ich,
&ctx,
target_name,
mech_type,
req_flags,
time_req,
pcbs,
pibuf,
&actual_mech_type,
&obuf,
NULL,
NULL);
if (ret_maj != GSS_S_COMPLETE &&
ret_maj != GSS_S_CONTINUE_NEEDED) {
goto done;
} else {
init_maj = ret_maj;
init_min = ret_min;
}
if (init_maj == GSS_S_CONTINUE_NEEDED) {
exp_ctx_type = gp_get_continue_needed_type();
}
iscr->context_handle = calloc(1, sizeof(gssx_ctx));
if (!iscr->context_handle) {
ret_maj = GSS_S_FAILURE;
ret_min = ENOMEM;
goto done;
}
ret_maj = gp_export_ctx_id_to_gssx(&ret_min, exp_ctx_type, mech_type,
&ctx, iscr->context_handle);
if (ret_maj) {
goto done;
}
if (obuf.length != 0) {
iscr->output_token = calloc(1, sizeof(gssx_buffer));
if (!iscr->output_token) {
ret_maj = GSS_S_FAILURE;
ret_min = ENOMEM;
goto done;
}
ret = gp_conv_buffer_to_gssx(&obuf, iscr->output_token);
if (ret) {
ret_maj = GSS_S_FAILURE;
ret_min = ret;
goto done;
}
}
ret_maj = GSS_S_COMPLETE;
done:
if (ret_maj == GSS_S_COMPLETE) {
ret_maj = init_maj;
ret_min = init_min;
}
ret = gp_conv_status_to_gssx(&isca->call_ctx,
ret_maj, ret_min, mech_type,
&iscr->status);
GPRPCDEBUG(gssx_res_init_sec_context, iscr);
gss_release_name(&ret_min, &target_name);
gss_release_oid(&ret_min, &mech_type);
gss_release_cred(&ret_min, &ich);
gss_release_buffer(&ret_min, &obuf);
return ret;
}
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