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/* Copyright (C) 2011,2012 the GSS-PROXY contributors, see COPYING for license */
#include "gssapi_gpm.h"
#include "src/gp_conv.h"
OM_uint32 gpm_unwrap(OM_uint32 *minor_status,
gssx_ctx *context_handle,
const gss_buffer_t input_message_buffer,
gss_buffer_t output_message_buffer,
int *conf_state,
gss_qop_t *qop_state)
{
union gp_rpc_arg uarg;
union gp_rpc_res ures;
gssx_arg_unwrap *arg = &uarg.unwrap;
gssx_res_unwrap *res = &ures.unwrap;
uint32_t ret_min = 0;
uint32_t ret_maj = 0;
int ret = 0;
gssx_buffer message_buffer;
memset(&uarg, 0, sizeof(union gp_rpc_arg));
memset(&ures, 0, sizeof(union gp_rpc_res));
if (!context_handle) {
return GSS_S_CALL_INACCESSIBLE_READ;
}
/* format request */
/* NOTE: the final free will also release the old context */
arg->context_handle = *context_handle;
if (qop_state) {
arg->qop_state = *qop_state;
}
ret = gp_conv_buffer_to_gssx(input_message_buffer, &message_buffer);
if (ret) {
ret_maj = GSS_S_FAILURE;
ret_min = ret;
goto done;
}
arg->token_buffer.token_buffer_val = calloc(1, sizeof(gssx_buffer));
if (!arg->token_buffer.token_buffer_val) {
ret_maj = GSS_S_FAILURE;
ret_min = ENOMEM;
goto done;
}
arg->token_buffer.token_buffer_val[0] = message_buffer;
arg->token_buffer.token_buffer_len = 1;
/* execute proxy request */
ret = gpm_make_call(GSSX_UNWRAP, &uarg, &ures);
if (ret) {
ret_maj = GSS_S_FAILURE;
ret_min = ret;
goto done;
}
/* format reply */
if (res->status.major_status) {
gpm_save_status(&res->status);
ret_min = res->status.minor_status;
ret_maj = res->status.major_status;
goto done;
}
if (conf_state) {
*conf_state = *res->conf_state;
}
if (qop_state) {
*qop_state = *res->qop_state;
}
if (res->message_buffer.message_buffer_len > 0) {
ret = gp_copy_gssx_to_buffer(&res->message_buffer.message_buffer_val[0],
output_message_buffer);
if (ret) {
ret_maj = GSS_S_FAILURE;
ret_min = ret;
goto done;
}
}
done:
/* Steal the new context if available.
* NOTE: We do not want it to be freed by xdr_free, so copy the contents
* and cear up the structure to be freed so contents are not freed. */
if (res->context_handle) {
*context_handle = *res->context_handle;
memset(res->context_handle, 0, sizeof(gssx_ctx));
} else {
/* prevent the contexthandle from being destroyed in case of server
* error. */
memset(&arg->context_handle, 0, sizeof(gssx_ctx));
}
gpm_free_xdrs(GSSX_UNWRAP, &uarg, &ures);
*minor_status = ret_min;
return ret_maj;
}
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