Exemplos de mbedtls_ecp_keypair_init em C++ (Cpp)

Exemplo n.º 1

Arquivo: pk_wrap.c Projeto: MarceloSalazar/mbed-os

static void *eckey_alloc_wrap( void )
{
    void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecp_keypair ) );

    if( ctx != NULL )
        mbedtls_ecp_keypair_init( ctx );

    return( ctx );
}

Exemplo n.º 2

Arquivo: mbedtls.c Projeto: jimsch/COSE-C

bool ECDSA_Verify(COSE * pSigner, int index, const cn_cbor * pKey, int cbitDigest, const byte * rgbToSign, size_t cbToSign, cose_errback * perr)
{
	mbedtls_ecp_keypair keypair;
	mbedtls_mpi r;
	mbedtls_mpi s;
	mbedtls_md_type_t mdType;
	const mbedtls_md_info_t *pmdInfo;
	byte rgbDigest[MBEDTLS_MD_MAX_SIZE];
	cn_cbor * pSig;
	bool result = false;

	mbedtls_ecp_keypair_init(&keypair);
	mbedtls_mpi_init(&r);
	mbedtls_mpi_init(&s);

	if(!ECKey_From(pKey, &keypair, perr)) goto errorReturn;

	switch(cbitDigest)
	{
	case 256:
		mdType = MBEDTLS_MD_SHA256;
		break;

	case 384:
		mdType = MBEDTLS_MD_SHA384;
		break;

	case 512:
		mdType = MBEDTLS_MD_SHA512;
		break;

	default:
		FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER);
	}
	pmdInfo = mbedtls_md_info_from_type(mdType);
	CHECK_CONDITION(pmdInfo != NULL, COSE_ERR_INVALID_PARAMETER);
	CHECK_CONDITION(mbedtls_md(pmdInfo, rgbToSign, cbToSign, rgbDigest) == 0, COSE_ERR_INVALID_PARAMETER);

	pSig = _COSE_arrayget_int(pSigner, index);
	CHECK_CONDITION((pSig != NULL) && (pSig->type == CN_CBOR_BYTES), COSE_ERR_INVALID_PARAMETER);

	CHECK_CONDITION(mbedtls_mpi_read_binary( &r, pSig->v.bytes, pSig->length / 2 ) == 0, COSE_ERR_OUT_OF_MEMORY);
	CHECK_CONDITION(mbedtls_mpi_read_binary( &s, pSig->v.bytes + pSig->length / 2, pSig->length / 2 ) == 0, COSE_ERR_OUT_OF_MEMORY);
	CHECK_CONDITION(mbedtls_ecdsa_verify(&keypair.grp, rgbDigest, mbedtls_md_get_size(pmdInfo), &keypair.Q, &r, &s) == 0, COSE_ERR_CRYPTO_FAIL);

	result = true;

errorReturn:
	mbedtls_mpi_free(&r);
	mbedtls_mpi_free(&s);
	mbedtls_ecp_keypair_free(&keypair);
	return result;
}

Exemplo n.º 3

Arquivo: ecdsa.c Projeto: MarceloSalazar/mbed-os

/*
 * Initialize context
 */
void mbedtls_ecdsa_init( mbedtls_ecdsa_context *ctx )
{
    mbedtls_ecp_keypair_init( ctx );
}

Exemplo n.º 4

Arquivo: mbedtls.c Projeto: jimsch/COSE-C

bool ECDSA_Sign(COSE * pSigner, int index, const cn_cbor * pKey, int cbitDigest, const byte * rgbToSign, size_t cbToSign, cose_errback * perr)
{
#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
	byte rgbDigest[MBEDTLS_MD_MAX_SIZE];
	uint8_t * pbSig = NULL;
	cn_cbor_errback cbor_error;
	int cbR;
	mbedtls_md_type_t mdType;
	const mbedtls_md_info_t *pmdInfo;
	mbedtls_ecp_keypair keypair;
	mbedtls_mpi r;
	mbedtls_mpi s;
#ifdef USE_CBOR_CONTEXT
	cn_cbor_context * context = &pSigner->m_allocContext;
#endif
	cn_cbor * p = NULL;
	bool result = false;

	mbedtls_ecp_keypair_init(&keypair);
	mbedtls_mpi_init(&r);
	mbedtls_mpi_init(&s);

	if(!ECKey_From(pKey, &keypair, perr)) goto errorReturn;

	CHECK_CONDITION(keypair.d.n != 0, COSE_ERR_INVALID_PARAMETER);

	switch(cbitDigest)
	{
	case 256:
		mdType = MBEDTLS_MD_SHA256;
		break;

	case 384:
		mdType = MBEDTLS_MD_SHA384;
		break;

	case 512:
		mdType = MBEDTLS_MD_SHA512;
		break;

	default:
		FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER);
	}
	pmdInfo = mbedtls_md_info_from_type(mdType);
	CHECK_CONDITION(pmdInfo != NULL, COSE_ERR_INVALID_PARAMETER);
	CHECK_CONDITION(mbedtls_md(pmdInfo, rgbToSign, cbToSign, rgbDigest) == 0, COSE_ERR_INVALID_PARAMETER);

	CHECK_CONDITION(mbedtls_ecdsa_sign_det(&keypair.grp, &r, &s, &keypair.d, rgbDigest, mbedtls_md_get_size(pmdInfo), mdType) == 0, COSE_ERR_CRYPTO_FAIL);

	cbR = (keypair.grp.nbits + 7) / 8;

	pbSig = COSE_CALLOC(cbR, 2, context);
	CHECK_CONDITION(pbSig != NULL, COSE_ERR_OUT_OF_MEMORY);

	CHECK_CONDITION(mbedtls_mpi_write_binary(&r, pbSig, cbR) == 0, COSE_ERR_INTERNAL);
	CHECK_CONDITION(mbedtls_mpi_write_binary(&s, pbSig + cbR, cbR) == 0, COSE_ERR_INTERNAL);

	p = cn_cbor_data_create(pbSig, cbR*2, CBOR_CONTEXT_PARAM_COMMA &cbor_error);
	CHECK_CONDITION_CBOR(p != NULL, cbor_error);

	CHECK_CONDITION(_COSE_array_replace(pSigner, p, index, CBOR_CONTEXT_PARAM_COMMA NULL), COSE_ERR_CBOR);

	p = NULL;
	pbSig = NULL;
	result = true;

errorReturn:
	cn_cbor_free(p CBOR_CONTEXT_PARAM);
	COSE_FREE(pbSig, context);
	mbedtls_mpi_free(&r);
	mbedtls_mpi_free(&s);
	mbedtls_ecp_keypair_free(&keypair);
	return result;
#else
	return false;
#endif
}