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/** \file MacMessage0.c
* Contains implementation of the functions related to HCOSE_MAC0 handle
* objects.
*/
#include <stdlib.h>
#ifndef __MBED__
#include <memory.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "cose/cose.h"
#include "cose_int.h"
#include "cose/cose_configure.h"
#include "cose_crypto.h"
#if INCLUDE_MAC0
COSE *Mac0Root = nullptr;
/*! \private
* @brief Test if a HCOSE_MAC0 handle is valid
*
* Internal function to test if a MAC0 message handle is valid.
* This will start returning invalid results and cause the code to
* crash if handles are not released before the memory that underlies them
* is deallocated. This is an issue of a block allocator is used since
* in that case it is common to allocate memory but never to de-allocate it
* and just do that in a single big block.
*
* @param h handle to be validated
* @returns result of check
*/
bool IsValidMac0Handle(HCOSE_MAC0 h)
{
COSE_Mac0Message *p = (COSE_Mac0Message *)h;
return _COSE_IsInList(Mac0Root, (COSE *)p);
}
HCOSE_MAC0 COSE_Mac0_Init(COSE_INIT_FLAGS flags,
CBOR_CONTEXT_COMMA cose_errback *perr)
{
COSE_Mac0Message *pobj = nullptr;
CHECK_CONDITION(flags == COSE_INIT_FLAGS_NONE, COSE_ERR_INVALID_PARAMETER);
pobj =
(COSE_Mac0Message *)COSE_CALLOC(1, sizeof(COSE_Mac0Message), context);
CHECK_CONDITION(pobj != nullptr, COSE_ERR_OUT_OF_MEMORY);
if (!_COSE_Init(flags, &pobj->m_message, COSE_mac0_object,
CBOR_CONTEXT_PARAM_COMMA perr)) {
goto errorReturn;
}
_COSE_InsertInList(&Mac0Root, &pobj->m_message);
return (HCOSE_MAC0)pobj;
errorReturn:
if (pobj != nullptr) {
_COSE_Mac0_Release(pobj);
COSE_FREE(pobj, context);
}
return nullptr;
}
HCOSE_MAC0 _COSE_Mac0_Init_From_Object(cn_cbor *cbor,
COSE_Mac0Message *pIn,
CBOR_CONTEXT_COMMA cose_errback *perr)
{
COSE_Mac0Message *pobj = pIn;
cn_cbor *pRecipients = nullptr;
// cn_cbor * tmp;
cose_errback error = {COSE_ERR_NONE};
if (perr == nullptr) {
perr = &error;
}
if (pobj == nullptr) {
pobj = (COSE_Mac0Message *)COSE_CALLOC(
1, sizeof(COSE_Mac0Message), context);
}
if (pobj == nullptr) {
perr->err = COSE_ERR_OUT_OF_MEMORY;
errorReturn:
if (pobj != nullptr) {
pobj->m_message.m_ownMsg = false;
_COSE_Mac0_Release(pobj);
if (pIn == nullptr) {
COSE_FREE(pobj, context);
}
}
return nullptr;
}
if (!_COSE_Init_From_Object(
&pobj->m_message, cbor, CBOR_CONTEXT_PARAM_COMMA perr)) {
goto errorReturn;
}
pRecipients = _COSE_arrayget_int(&pobj->m_message, INDEX_MAC_RECIPIENTS);
CHECK_CONDITION(pRecipients == nullptr, COSE_ERR_INVALID_PARAMETER);
_COSE_InsertInList(&Mac0Root, &pobj->m_message);
return (HCOSE_MAC0)pobj;
}
bool COSE_Mac0_Free(HCOSE_MAC0 h)
{
#ifdef USE_CBOR_CONTEXT
cn_cbor_context *context;
#endif
COSE_Mac0Message *p = (COSE_Mac0Message *)h;
if (!IsValidMac0Handle(h)) {
return false;
}
if (p->m_message.m_refCount > 1) {
p->m_message.m_refCount--;
return true;
}
_COSE_RemoveFromList(&Mac0Root, &p->m_message);
#ifdef USE_CBOR_CONTEXT
context = &p->m_message.m_allocContext;
#endif
_COSE_Mac0_Release(p);
COSE_FREE(p, context);
return true;
}
bool _COSE_Mac0_Release(COSE_Mac0Message *p)
{
_COSE_Release(&p->m_message);
return true;
}
bool COSE_Mac0_SetContent(HCOSE_MAC0 cose,
const byte *rgbContent,
size_t cbContent,
cose_errback *perr)
{
COSE_Mac0Message *p = (COSE_Mac0Message *)cose;
#ifdef USE_CBOR_CONTEXT
cn_cbor_context *context = &p->m_message.m_allocContext;
#endif
cn_cbor *ptmp = nullptr;
cn_cbor_errback cbor_error;
CHECK_CONDITION(IsValidMac0Handle(cose), COSE_ERR_INVALID_PARAMETER);
ptmp = cn_cbor_data_create(
rgbContent, (int)cbContent, CBOR_CONTEXT_PARAM_COMMA & cbor_error);
CHECK_CONDITION_CBOR(ptmp != nullptr, cbor_error);
CHECK_CONDITION_CBOR(_COSE_array_replace(&p->m_message, ptmp, INDEX_BODY,
CBOR_CONTEXT_PARAM_COMMA & cbor_error),
cbor_error);
ptmp = nullptr;
return true;
errorReturn:
if (ptmp != nullptr) {
CN_CBOR_FREE(ptmp, context);
}
return false;
}
/*!
* @brief Set the application external data for authentication
*
* MAC data objects support the authentication of external application
* supplied data. This function is provided to supply that data to the library.
*
* The external data is not copied, nor will be it freed when the handle is
* released.
*
* @param hcose Handle for the COSE MAC data object
* @param pbEternalData point to the external data
* @param cbExternalData size of the external data
* @param perr location to return errors
* @return result of the operation.
*/
bool COSE_Mac0_SetExternal(HCOSE_MAC0 hcose,
const byte *pbExternalData,
size_t cbExternalData,
cose_errback *perr)
{
if (!IsValidMac0Handle(hcose)) {
if (perr != nullptr) {
perr->err = COSE_ERR_INVALID_PARAMETER;
}
return false;
}
return _COSE_SetExternal(&((COSE_Mac0Message *)hcose)->m_message,
pbExternalData, cbExternalData, perr);
}
cn_cbor *COSE_Mac0_map_get_int(HCOSE_MAC0 h,
int key,
int flags,
cose_errback *perror)
{
if (!IsValidMac0Handle(h)) {
if (perror != nullptr) {
perror->err = COSE_ERR_INVALID_PARAMETER;
}
return nullptr;
}
return _COSE_map_get_int(
&((COSE_Mac0Message *)h)->m_message, key, flags, perror);
}
bool COSE_Mac0_map_put_int(HCOSE_MAC0 h,
int key,
cn_cbor *value,
int flags,
cose_errback *perror)
{
if (!IsValidMac0Handle(h) || (value == nullptr)) {
if (perror != nullptr) {
perror->err = COSE_ERR_INVALID_PARAMETER;
}
return false;
}
return _COSE_map_put(
&((COSE_Mac0Message *)h)->m_message, key, value, flags, perror);
}
bool COSE_Mac0_encrypt(HCOSE_MAC0 h,
const byte *pbKey,
size_t cbKey,
cose_errback *perr)
{
COSE_Mac0Message *pcose = (COSE_Mac0Message *)h;
CHECK_CONDITION(IsValidMac0Handle(h), COSE_ERR_INVALID_HANDLE);
CHECK_CONDITION(pbKey != nullptr, COSE_ERR_INVALID_PARAMETER);
return _COSE_Mac_compute(pcose, pbKey, cbKey, "MAC0", perr);
errorReturn:
return false;
}
bool COSE_Mac0_validate(HCOSE_MAC0 h,
const byte *pbKey,
size_t cbKey,
cose_errback *perr)
{
COSE_Mac0Message *pcose = (COSE_Mac0Message *)h;
CHECK_CONDITION(IsValidMac0Handle(h), COSE_ERR_INVALID_HANDLE);
CHECK_CONDITION(pbKey != nullptr, COSE_ERR_INVALID_PARAMETER);
return _COSE_Mac_validate(pcose, nullptr, pbKey, cbKey, "MAC0", perr);
errorReturn:
return false;
}
#endif