blob: 04b781b1ee41ddbbd1b7c2e16ee34f7da615a0f7 [file] [log] [blame]
/** \file MacMessage0.c
* Contains implementation of the functions related to HCOSE_MAC0 handle objects.
*/
#include <stdlib.h>
#include <memory.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "cose.h"
#include "cose_int.h"
#include "configure.h"
#include "crypto.h"
COSE * Mac0Root = NULL;
/*! \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 = NULL;
CHECK_CONDITION(flags == COSE_INIT_FLAGS_NONE, COSE_ERR_INVALID_PARAMETER);
pobj = (COSE_Mac0Message *)COSE_CALLOC(1, sizeof(COSE_Mac0Message), context);
CHECK_CONDITION(pobj != NULL, 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 != NULL) {
_COSE_Mac0_Release(pobj);
COSE_FREE(pobj, context);
}
return NULL;
}
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 = NULL;
// cn_cbor * tmp;
cose_errback error = { COSE_ERR_NONE };
if (perr == NULL) perr = &error;
if (pobj == NULL) pobj = (COSE_Mac0Message *)COSE_CALLOC(1, sizeof(COSE_Mac0Message), context);
if (pobj == NULL) {
perr->err = COSE_ERR_OUT_OF_MEMORY;
errorReturn:
if (pobj != NULL) {
_COSE_Mac0_Release(pobj);
if (pIn == NULL) {
COSE_FREE(pobj, context);
}
}
return NULL;
}
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 == NULL, 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 = NULL;
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 != NULL, cbor_error);
CHECK_CONDITION_CBOR(_COSE_array_replace(&p->m_message, ptmp, INDEX_BODY, CBOR_CONTEXT_PARAM_COMMA &cbor_error), cbor_error);
ptmp = NULL;
return true;
errorReturn:
if (ptmp != NULL) 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 != NULL) 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 != NULL) perror->err = COSE_ERR_INVALID_PARAMETER;
return NULL;
}
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 == NULL)) {
if (perror != NULL) 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)
{
int alg;
const cn_cbor * cn_Alg = NULL;
byte * pbAuthData = NULL;
size_t cbitKey;
#ifdef USE_CBOR_CONTEXT
cn_cbor_context * context = NULL;
#endif
COSE_Mac0Message * pcose = (COSE_Mac0Message *)h;
bool fRet = false;
size_t cbAuthData;
CHECK_CONDITION(IsValidMac0Handle(h), COSE_ERR_INVALID_PARAMETER);
#ifdef USE_CBOR_CONTEXT
context = &pcose->m_message.m_allocContext;
#endif // USE_CBOR_CONTEXT
cn_Alg = _COSE_map_get_int(&pcose->m_message, COSE_Header_Algorithm, COSE_BOTH, perr);
if (cn_Alg == NULL) goto errorReturn;
CHECK_CONDITION(cn_Alg->type != CN_CBOR_TEXT, COSE_ERR_UNKNOWN_ALGORITHM);
CHECK_CONDITION(((cn_Alg->type == CN_CBOR_UINT || cn_Alg->type == CN_CBOR_INT)), COSE_ERR_INVALID_PARAMETER);
alg = (int) cn_Alg->v.uint;
// Get the key size
switch (alg) {
case COSE_Algorithm_CBC_MAC_128_64:
case COSE_Algorithm_CBC_MAC_128_128:
cbitKey = 128;
break;
case COSE_Algorithm_CBC_MAC_256_64:
case COSE_Algorithm_CBC_MAC_256_128:
case COSE_Algorithm_HMAC_256_64:
case COSE_Algorithm_HMAC_256_256:
cbitKey = 256;
break;
case COSE_Algorithm_HMAC_384_384:
cbitKey = 384;
break;
case COSE_Algorithm_HMAC_512_512:
cbitKey = 512;
break;
default:
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
}
// Build protected headers
const cn_cbor * cbProtected = _COSE_encode_protected(&pcose->m_message, perr);
if (cbProtected == NULL) goto errorReturn;
// Build authenticated data
if (!_COSE_Mac_Build_AAD(&pcose->m_message, "MAC0", &pbAuthData, &cbAuthData, CBOR_CONTEXT_PARAM_COMMA perr)) goto errorReturn;
switch (alg) {
case COSE_Algorithm_CBC_MAC_128_64:
case COSE_Algorithm_CBC_MAC_256_64:
if (!AES_CBC_MAC_Create((COSE_MacMessage *)pcose, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_CBC_MAC_128_128:
case COSE_Algorithm_CBC_MAC_256_128:
if (!AES_CBC_MAC_Create((COSE_MacMessage *)pcose, 128, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_HMAC_256_64:
if (!HMAC_Create((COSE_MacMessage *)pcose, 256, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_HMAC_256_256:
if (!HMAC_Create((COSE_MacMessage *)pcose, 256, 256, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_HMAC_384_384:
if (!HMAC_Create((COSE_MacMessage *)pcose, 384, 384, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_HMAC_512_512:
if (!HMAC_Create((COSE_MacMessage *)pcose, 512, 512, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
default:
FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER);
}
// Figure out the clean up
fRet = true;
errorReturn:
if (pbAuthData != NULL) COSE_FREE(pbAuthData, context);
return fRet;
}
bool COSE_Mac0_validate(HCOSE_MAC0 h, const byte * pbKey, size_t cbKey, cose_errback * perr)
{
COSE_Mac0Message * pcose = (COSE_Mac0Message *)h;
byte * pbAuthData = NULL;
int cbitKey = 0;
bool fRet = false;
int alg;
const cn_cbor * cn = NULL;
#ifdef USE_CBOR_CONTEXT
cn_cbor_context * context = NULL;
#endif
size_t cbAuthData;
CHECK_CONDITION(IsValidMac0Handle(h), COSE_ERR_INVALID_PARAMETER);
#ifdef USE_CBOR_CONTEXT
context = &pcose->m_message.m_allocContext;
#endif
cn = _COSE_map_get_int(&pcose->m_message, COSE_Header_Algorithm, COSE_BOTH, perr);
if (cn == NULL) goto errorReturn;
if (cn->type == CN_CBOR_TEXT) {
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
}
else {
CHECK_CONDITION((cn->type == CN_CBOR_UINT || cn->type == CN_CBOR_INT), COSE_ERR_INVALID_PARAMETER);
alg = (int)cn->v.uint;
switch (alg) {
case COSE_Algorithm_CBC_MAC_128_64:
case COSE_Algorithm_CBC_MAC_128_128:
cbitKey = 128;
break;
case COSE_Algorithm_CBC_MAC_256_64:
case COSE_Algorithm_CBC_MAC_256_128:
case COSE_Algorithm_HMAC_256_64:
case COSE_Algorithm_HMAC_256_256:
cbitKey = 256;
break;
case COSE_Algorithm_HMAC_384_384:
cbitKey = 384;
break;
case COSE_Algorithm_HMAC_512_512:
cbitKey = 512;
break;
default:
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
break;
}
}
// Build protected headers
cn_cbor * cnProtected = _COSE_arrayget_int(&pcose->m_message, INDEX_PROTECTED);
CHECK_CONDITION((cnProtected != NULL) && (cnProtected->type == CN_CBOR_BYTES), COSE_ERR_INVALID_PARAMETER);
// Build authenticated data
if (!_COSE_Mac_Build_AAD(&pcose->m_message, "MAC0", &pbAuthData, &cbAuthData, CBOR_CONTEXT_PARAM_COMMA perr)) goto errorReturn;
switch (alg) {
case COSE_Algorithm_HMAC_256_256:
if (!HMAC_Validate((COSE_MacMessage *)pcose, 256, 256, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_HMAC_256_64:
if (!HMAC_Validate((COSE_MacMessage *)pcose, 256, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_HMAC_384_384:
if (!HMAC_Validate((COSE_MacMessage *)pcose, 384, 384, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_HMAC_512_512:
if (!HMAC_Validate((COSE_MacMessage *)pcose, 512, 512, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_CBC_MAC_128_64:
case COSE_Algorithm_CBC_MAC_256_64:
if (!AES_CBC_MAC_Validate((COSE_MacMessage *)pcose, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
case COSE_Algorithm_CBC_MAC_128_128:
case COSE_Algorithm_CBC_MAC_256_128:
if (!AES_CBC_MAC_Validate((COSE_MacMessage *)pcose, 128, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
break;
default:
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
break;
}
fRet = true;
errorReturn:
if (pbAuthData != NULL) COSE_FREE(pbAuthData, context);
return fRet;
}