C++ (Cpp) _COSE_encode_protected Examples

Example #1

File: MacMessage0.c Project: KaneRoot/COSE-C

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;
	cn_cbor * pAuthData = NULL;
	cn_cbor * ptmp = NULL;
	size_t cbitKey;
#ifdef USE_CBOR_CONTEXT
	cn_cbor_context * context = NULL;
#endif
	COSE_Mac0Message * pcose = (COSE_Mac0Message *)h;
	cn_cbor_errback cbor_error;

	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_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_INVALID_PARAMETER);
	}

	//  Build protected headers

	const cn_cbor * cbProtected = _COSE_encode_protected(&pcose->m_message, perr);
	if (cbProtected == NULL) goto errorReturn;

	//  Get the body
	const cn_cbor * cbBody = _COSE_arrayget_int(&pcose->m_message, INDEX_BODY);
	CHECK_CONDITION(cbBody != NULL, COSE_ERR_INVALID_PARAMETER);

	//  Build authenticated data
	//  Protected headers
	//  external data
	//  body

	size_t cbAuthData = 0;
	pAuthData = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA NULL);
	CHECK_CONDITION(pAuthData != NULL, COSE_ERR_OUT_OF_MEMORY);

	ptmp = cn_cbor_string_create("MAC0", CBOR_CONTEXT_PARAM_COMMA &cbor_error);
	CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error);
	CHECK_CONDITION_CBOR(cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error);
	ptmp = NULL;

	ptmp = cn_cbor_data_create(cbProtected->v.bytes, (int) cbProtected->length, CBOR_CONTEXT_PARAM_COMMA NULL);
	CHECK_CONDITION(ptmp != NULL, COSE_ERR_CBOR);

	CHECK_CONDITION(cn_cbor_array_append(pAuthData, ptmp, NULL), COSE_ERR_CBOR);
	ptmp = NULL;

	ptmp = cn_cbor_data_create(NULL, 0, CBOR_CONTEXT_PARAM_COMMA &cbor_error);
	CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error);
	CHECK_CONDITION_CBOR(cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error);
	ptmp = NULL;

	ptmp = cn_cbor_data_create(cbBody->v.bytes, (int) cbBody->length, CBOR_CONTEXT_PARAM_COMMA &cbor_error);
	CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error);
	CHECK_CONDITION_CBOR(cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error);
	ptmp = NULL;

	cbAuthData = cn_cbor_encoder_write(RgbDontUse2, 0, sizeof(RgbDontUse2), pAuthData);
	CHECK_CONDITION(cbAuthData > 0, COSE_ERR_CBOR);
	pbAuthData = (byte *)COSE_CALLOC(cbAuthData, 1, context);
	CHECK_CONDITION(pbAuthData != NULL, COSE_ERR_OUT_OF_MEMORY);
	CHECK_CONDITION(cn_cbor_encoder_write(pbAuthData, 0, cbAuthData, pAuthData) == cbAuthData, COSE_ERR_CBOR);

	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

	if (pbAuthData != NULL) COSE_FREE(pbAuthData, context);
	if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM);
	if (ptmp != NULL) cn_cbor_free(ptmp CBOR_CONTEXT_PARAM);
	return true;

errorReturn:
	if (pbAuthData != NULL) COSE_FREE(pbAuthData, context);
	if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM);
	if (ptmp != NULL) cn_cbor_free(ptmp CBOR_CONTEXT_PARAM);
	return false;
}

Example #2

File: Encrypt0.c Project: KaneRoot/COSE-C

bool COSE_Encrypt_encrypt(HCOSE_ENCRYPT h, const byte * pbKey, size_t cbKey, cose_errback * perr)
{
	int alg;
	const cn_cbor * cn_Alg = NULL;
	byte * pbAuthData = NULL;
	cn_cbor * pAuthData = NULL;
	cn_cbor * ptmp = NULL;
	size_t cbitKey;
#ifdef USE_CBOR_CONTEXT
	cn_cbor_context * context = NULL;
#endif
	COSE_Encrypt * pcose = (COSE_Encrypt *) h;

	CHECK_CONDITION(IsValidEncryptHandle(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_UINT) || (cn_Alg->type == CN_CBOR_INT), COSE_ERR_INVALID_PARAMETER);
	alg = (int) cn_Alg->v.uint;

	//  Get the key size

	switch (alg) {
#ifdef INCLUDE_AES_CCM
	case COSE_Algorithm_AES_CCM_64_64_128:
	case COSE_Algorithm_AES_CCM_16_128_128:
	case COSE_Algorithm_AES_CCM_64_128_128:
	case COSE_Algorithm_AES_CCM_16_64_128:
		cbitKey = 128;
		break;

	case COSE_Algorithm_AES_CCM_64_64_256:
	case COSE_Algorithm_AES_CCM_16_128_256:
	case COSE_Algorithm_AES_CCM_64_128_256:
	case COSE_Algorithm_AES_CCM_16_64_256:
		cbitKey = 256;
		break;
#endif // INCLUDE_AES_CCM

	case COSE_Algorithm_AES_GCM_128: cbitKey = 128; break;
	case COSE_Algorithm_AES_GCM_192: cbitKey = 192; break;
	case COSE_Algorithm_AES_GCM_256: cbitKey = 256; break;

	default:
		FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER);
	}

	//  Build protected headers

	const cn_cbor * cbProtected = _COSE_encode_protected(&pcose->m_message, perr);
	if (cbProtected == NULL) goto errorReturn;

	//  Build authenticated data
	size_t cbAuthData = 0;

	if (!_COSE_Encrypt_Build_AAD(&pcose->m_message, &pbAuthData, &cbAuthData, "Encrypted", perr)) goto errorReturn;

	switch (alg) {
#ifdef INCLUDE_AES_CCM
	case COSE_Algorithm_AES_CCM_16_64_128:
	case COSE_Algorithm_AES_CCM_16_64_256:
		if (!AES_CCM_Encrypt((COSE_Enveloped *)pcose, 64, 16, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;

	case COSE_Algorithm_AES_CCM_16_128_128:
	case COSE_Algorithm_AES_CCM_16_128_256:
		if (!AES_CCM_Encrypt((COSE_Enveloped *)pcose, 128, 16, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;

	case COSE_Algorithm_AES_CCM_64_64_128:
	case COSE_Algorithm_AES_CCM_64_64_256:
		if (!AES_CCM_Encrypt((COSE_Enveloped *)pcose, 64, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;

	case COSE_Algorithm_AES_CCM_64_128_128:
	case COSE_Algorithm_AES_CCM_64_128_256:
		if (!AES_CCM_Encrypt((COSE_Enveloped *)pcose, 128, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

	case COSE_Algorithm_AES_GCM_128:
	case COSE_Algorithm_AES_GCM_192:
	case COSE_Algorithm_AES_GCM_256:
		if (!AES_GCM_Encrypt((COSE_Enveloped *)pcose, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;

	default:
		FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER);
	}

	//  Figure out the clean up

	if (pbAuthData != NULL) COSE_FREE(pbAuthData, context);
	if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM);

	return true;

errorReturn:
	if (pbAuthData != NULL) COSE_FREE(pbAuthData, context);
	if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM);
	if (ptmp != NULL) cn_cbor_free(ptmp CBOR_CONTEXT_PARAM);
	return false;
}

Example #3

File: Encrypt.c Project: Gunzter/COSE-C

bool _COSE_Enveloped_encrypt(COSE_Enveloped * pcose, const byte * pbKeyIn, size_t cbKeyIn, const char * szContext, cose_errback * perr)
{
	int alg;
	int t;
	COSE_RecipientInfo * pri;
	const cn_cbor * cn_Alg = NULL;
	byte * pbAuthData = NULL;
	size_t cbitKey;
#ifdef USE_CBOR_CONTEXT
	cn_cbor_context * context = &pcose->m_message.m_allocContext;
#endif
	bool fRet = false;
	byte * pbKey = NULL;
	size_t cbKey = 0;

	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) {
#ifdef USE_AES_CCM_64_64_128
	case COSE_Algorithm_AES_CCM_64_64_128:
		cbitKey = 128;
		break;
#endif

#ifdef USE_AES_CCM_16_128_128
	case COSE_Algorithm_AES_CCM_16_128_128:
		cbitKey = 128;
		break;
#endif

#ifdef USE_AES_CCM_64_128_128
	case COSE_Algorithm_AES_CCM_64_128_128:
		cbitKey = 128;
		break;
#endif

#ifdef USE_AES_CCM_16_64_128
	case COSE_Algorithm_AES_CCM_16_64_128:
		cbitKey = 128;
		break;
#endif

#ifdef USE_AES_CCM_64_64_256
	case COSE_Algorithm_AES_CCM_64_64_256:
		cbitKey = 256;
		break;
#endif

#ifdef USE_AES_CCM_16_128_256
	case COSE_Algorithm_AES_CCM_16_128_256:
		cbitKey = 256;
		break;
#endif

#ifdef USE_AES_CCM_64_128_256
	case COSE_Algorithm_AES_CCM_64_128_256:
		cbitKey = 256;
		break;
#endif

#ifdef USE_AES_CCM_16_64_256
	case COSE_Algorithm_AES_CCM_16_64_256:
		cbitKey = 256;
		break;
#endif

#ifdef USE_AES_GCM_128
	case COSE_Algorithm_AES_GCM_128: 
		cbitKey = 128; 
		break;
#endif

#ifdef USE_AES_GCM_192
	case COSE_Algorithm_AES_GCM_192: 
		cbitKey = 192; 
		break;
#endif

#ifdef USE_AES_GCM_256
	case COSE_Algorithm_AES_GCM_256: 
		cbitKey = 256; 
		break;
#endif

	default:
		FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
	}

	//  Enveloped or Encrypted?

	if (pbKeyIn != NULL) {
		CHECK_CONDITION(cbKeyIn == cbitKey / 8, COSE_ERR_INVALID_PARAMETER);
		pbKey = pbKeyIn;
		cbKey = cbKeyIn;
	}
	else {
		//  If we are doing direct encryption - then recipient generates the key

		t = 0;
		for (pri = pcose->m_recipientFirst; pri != NULL; pri = pri->m_recipientNext) {
			if (pri->m_encrypt.m_message.m_flags & 1) {
				CHECK_CONDITION(pbKey == NULL, COSE_ERR_INVALID_PARAMETER);

				t |= 1;
				pbKey = _COSE_RecipientInfo_generateKey(pri, alg, cbitKey, perr);
				cbKey = cbitKey / 8;
				if (pbKey == NULL) goto errorReturn;
			}
			else {
				t |= 2;
			}
		}
		CHECK_CONDITION(t != 3, COSE_ERR_INVALID_PARAMETER);

		if (t == 2) {
			pbKey = (byte *)COSE_CALLOC(cbitKey / 8, 1, context);
			CHECK_CONDITION(pbKey != NULL, COSE_ERR_OUT_OF_MEMORY);
			cbKey = cbitKey / 8;
			rand_bytes(pbKey, cbKey);
		}
	}

	//  Build protected headers

	const cn_cbor * cbProtected = _COSE_encode_protected(&pcose->m_message, perr);
	if (cbProtected == NULL) goto errorReturn;

#ifdef USE_COUNTER_SIGNATURES
	//  Setup Counter Signatures
	if (!_COSE_CountSign_create(&pcose->m_message, NULL, CBOR_CONTEXT_PARAM_COMMA perr)) {
		goto errorReturn;
	}
#endif

	//  Build authenticated data

	size_t cbAuthData = 0;
	if (!_COSE_Encrypt_Build_AAD(&pcose->m_message, &pbAuthData, &cbAuthData, szContext, perr)) goto errorReturn;

	switch (alg) {
#ifdef USE_AES_CCM_16_64_128
	case COSE_Algorithm_AES_CCM_16_64_128:
		if (!AES_CCM_Encrypt(pcose, 64, 16, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_CCM_16_64_256
	case COSE_Algorithm_AES_CCM_16_64_256:
		if (!AES_CCM_Encrypt(pcose, 64, 16, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_CCM_16_128_128
	case COSE_Algorithm_AES_CCM_16_128_128:
		if (!AES_CCM_Encrypt(pcose, 128, 16, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_CCM_16_128_256
	case COSE_Algorithm_AES_CCM_16_128_256:
		if (!AES_CCM_Encrypt(pcose, 128, 16, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_CCM_64_64_128
	case COSE_Algorithm_AES_CCM_64_64_128:
		if (!AES_CCM_Encrypt(pcose, 64, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_CCM_64_64_256
	case COSE_Algorithm_AES_CCM_64_64_256:
		if (!AES_CCM_Encrypt(pcose, 64, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_CCM_64_128_128
	case COSE_Algorithm_AES_CCM_64_128_128:
		if (!AES_CCM_Encrypt(pcose, 128, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_CCM_64_128_256
	case COSE_Algorithm_AES_CCM_64_128_256:
		if (!AES_CCM_Encrypt(pcose, 128, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_GCM_128
	case COSE_Algorithm_AES_GCM_128:
		if (!AES_GCM_Encrypt(pcose, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_GCM_192
	case COSE_Algorithm_AES_GCM_192:
		if (!AES_GCM_Encrypt(pcose, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

#ifdef USE_AES_GCM_256
	case COSE_Algorithm_AES_GCM_256:
		if (!AES_GCM_Encrypt(pcose, pbKey, cbKey, pbAuthData, cbAuthData, perr)) goto errorReturn;
		break;
#endif

	default:
		FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
	}

	for (pri = pcose->m_recipientFirst; pri != NULL; pri = pri->m_recipientNext) {
		if (!_COSE_Recipient_encrypt(pri, pbKey, cbKey, perr)) goto errorReturn;
	}

	//  Figure out the clean up

	fRet = true;

errorReturn:
	if (pbAuthData != NULL) COSE_FREE(pbAuthData, context);
	if ((pbKey != NULL) && (pbKey != pbKeyIn)) {
		memset(pbKey, 0, cbKey);
		COSE_FREE(pbKey, context);
	}
	return fRet;
}