void _gnutls_x509_privkey_reinit(gnutls_x509_privkey_t key)
{
gnutls_pk_params_clear(&key->params);
gnutls_pk_params_release(&key->params);
asn1_delete_structure2(&key->key, ASN1_DELETE_FLAG_ZEROIZE);
key->key = ASN1_TYPE_EMPTY;
}
int _gnutls_dh_compute_key(gnutls_dh_params_t dh_params,
const gnutls_datum_t *priv_key, const gnutls_datum_t *pub_key,
const gnutls_datum_t *peer_key, gnutls_datum_t *Z)
{
gnutls_pk_params_st pub, priv;
int ret;
gnutls_pk_params_init(&pub);
gnutls_pk_params_init(&priv);
pub.algo = GNUTLS_PK_DH;
if (_gnutls_mpi_init_scan_nz
(&pub.params[DH_Y], peer_key->data,
peer_key->size) != 0) {
ret =
gnutls_assert_val(GNUTLS_E_MPI_SCAN_FAILED);
goto cleanup;
}
priv.params[DH_P] = _gnutls_mpi_copy(dh_params->params[0]);
priv.params[DH_G] = _gnutls_mpi_copy(dh_params->params[1]);
if (_gnutls_mpi_init_scan_nz
(&priv.params[DH_X], priv_key->data,
priv_key->size) != 0) {
ret =
gnutls_assert_val(GNUTLS_E_MPI_SCAN_FAILED);
goto cleanup;
}
priv.params_nr = 3; /* include empty q */
priv.algo = GNUTLS_PK_DH;
Z->data = NULL;
ret = _gnutls_pk_derive(GNUTLS_PK_DH, Z, &priv, &pub);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = 0;
cleanup:
gnutls_pk_params_clear(&pub);
gnutls_pk_params_clear(&priv);
return ret;
}
/**
* gnutls_x509_privkey_generate:
* @key: should contain a #gnutls_x509_privkey_t structure
* @algo: is one of the algorithms in #gnutls_pk_algorithm_t.
* @bits: the size of the modulus
* @flags: unused for now. Must be 0.
*
* This function will generate a random private key. Note that this
* function must be called on an empty private key.
*
* Note that when generating an elliptic curve key, the curve
* can be substituted in the place of the bits parameter using the
* GNUTLS_CURVE_TO_BITS() macro.
*
* For DSA keys, if the subgroup size needs to be specified check
* the GNUTLS_SUBGROUP_TO_BITS() macro.
*
* Do not set the number of bits directly, use gnutls_sec_param_to_pk_bits().
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
**/
int
gnutls_x509_privkey_generate(gnutls_x509_privkey_t key,
gnutls_pk_algorithm_t algo, unsigned int bits,
unsigned int flags)
{
int ret;
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
gnutls_pk_params_init(&key->params);
if (algo == GNUTLS_PK_EC) {
if (GNUTLS_BITS_ARE_CURVE(bits))
bits = GNUTLS_BITS_TO_CURVE(bits);
else
bits = _gnutls_ecc_bits_to_curve(bits);
}
ret = _gnutls_pk_generate_params(algo, bits, &key->params);
if (ret < 0) {
gnutls_assert();
return ret;
}
ret = _gnutls_pk_generate_keys(algo, bits, &key->params);
if (ret < 0) {
gnutls_assert();
return ret;
}
#ifndef ENABLE_FIPS140
ret = _gnutls_pk_verify_priv_params(algo, &key->params);
#else
ret = pct_test(algo, &key->params);
#endif
if (ret < 0) {
gnutls_assert();
return ret;
}
ret = _gnutls_asn1_encode_privkey(algo, &key->key, &key->params);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
key->pk_algorithm = algo;
return 0;
cleanup:
key->pk_algorithm = GNUTLS_PK_UNKNOWN;
gnutls_pk_params_clear(&key->params);
gnutls_pk_params_release(&key->params);
return ret;
}
/*-
* _gnutls_openpgp_privkey_decrypt_data:
* @key: Holds the key
* @flags: (0) for now
* @ciphertext: holds the data to be decrypted
* @plaintext: will contain newly allocated plaintext
*
* This function will sign the given hash using the private key. You
* should use gnutls_openpgp_privkey_set_preferred_key_id() before
* calling this function to set the subkey to use.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
-*/
int
_gnutls_openpgp_privkey_decrypt_data (gnutls_openpgp_privkey_t key,
unsigned int flags,
const gnutls_datum_t * ciphertext,
gnutls_datum_t * plaintext)
{
int result, i;
gnutls_pk_params_st params;
int pk_algorithm;
uint8_t keyid[GNUTLS_OPENPGP_KEYID_SIZE];
char buf[2*GNUTLS_OPENPGP_KEYID_SIZE+1];
if (key == NULL)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
result = gnutls_openpgp_privkey_get_preferred_key_id (key, keyid);
if (result == 0)
{
uint32_t kid[2];
KEYID_IMPORT (kid, keyid);
_gnutls_hard_log("Decrypting using PGP key ID %s\n", _gnutls_bin2hex(keyid, GNUTLS_OPENPGP_KEYID_SIZE, buf, sizeof(buf), NULL));
result = _gnutls_openpgp_privkey_get_mpis (key, kid, ¶ms);
i = gnutls_openpgp_privkey_get_subkey_idx (key, keyid);
pk_algorithm = gnutls_openpgp_privkey_get_subkey_pk_algorithm (key, i, NULL);
}
else
{
_gnutls_hard_log("Decrypting using master PGP key\n");
pk_algorithm = gnutls_openpgp_privkey_get_pk_algorithm (key, NULL);
result = _gnutls_openpgp_privkey_get_mpis (key, NULL, ¶ms);
}
if (result < 0)
{
gnutls_assert ();
return result;
}
result = _gnutls_pk_decrypt (pk_algorithm, plaintext, ciphertext, ¶ms);
gnutls_pk_params_clear(¶ms);
gnutls_pk_params_release(¶ms);
if (result < 0)
return gnutls_assert_val(result);
return 0;
}
int
_gnutls_gen_dh_common_client_kx_int(gnutls_session_t session,
gnutls_buffer_st * data,
gnutls_datum_t * pskkey)
{
int ret;
gnutls_pk_params_st peer_pub;
gnutls_datum_t tmp_dh_key = {NULL, 0};
gnutls_pk_params_init(&peer_pub);
ret =
_gnutls_pk_generate_keys(GNUTLS_PK_DH, 0,
&session->key.dh_params, 1);
if (ret < 0)
return gnutls_assert_val(ret);
_gnutls_dh_set_secret_bits(session, _gnutls_mpi_get_nbits(session->key.dh_params.params[DH_X]));
ret = _gnutls_buffer_append_mpi(data, 16, session->key.dh_params.params[DH_Y], 0);
if (ret < 0) {
gnutls_assert();
goto error;
}
peer_pub.params[DH_Y] = session->key.client_Y;
/* calculate the key after calculating the message */
ret = _gnutls_pk_derive(GNUTLS_PK_DH, &tmp_dh_key, &session->key.dh_params, &peer_pub);
if (ret < 0) {
gnutls_assert();
goto error;
}
if (_gnutls_cipher_suite_get_kx_algo
(session->security_parameters.cipher_suite)
!= GNUTLS_KX_DHE_PSK) {
session->key.key.data = tmp_dh_key.data;
session->key.key.size = tmp_dh_key.size;
} else { /* In DHE_PSK the key is set differently */
ret =
_gnutls_set_psk_session_key(session, pskkey,
&tmp_dh_key);
_gnutls_free_temp_key_datum(&tmp_dh_key);
}
if (ret < 0) {
gnutls_assert();
goto error;
}
ret = data->length;
error:
gnutls_pk_params_clear(&session->key.dh_params);
return ret;
}
int _gnutls_ecdh_generate_key(gnutls_ecc_curve_t curve,
gnutls_datum_t *x, gnutls_datum_t *y,
gnutls_datum_t *k)
{
gnutls_pk_params_st params;
int ret;
gnutls_pk_params_init(¶ms);
params.flags = curve;
params.algo = GNUTLS_PK_EC;
x->data = NULL;
y->data = NULL;
k->data = NULL;
ret = _gnutls_pk_generate_keys(GNUTLS_PK_EC, curve, ¶ms);
if (ret < 0) {
return gnutls_assert_val(ret);
}
ret =
_gnutls_mpi_dprint_lz(params.params[ECC_X], x);
if (ret < 0) {
gnutls_assert();
goto fail;
}
ret =
_gnutls_mpi_dprint_lz(params.params[ECC_Y], y);
if (ret < 0) {
gnutls_assert();
goto fail;
}
ret =
_gnutls_mpi_dprint_lz(params.params[ECC_K], k);
if (ret < 0) {
gnutls_assert();
goto fail;
}
ret = 0;
goto cleanup;
fail:
gnutls_free(y->data);
gnutls_free(x->data);
gnutls_free(k->data);
cleanup:
gnutls_pk_params_clear(¶ms);
return ret;
}
/**
* gnutls_x509_privkey_import_ecc_raw:
* @key: The structure to store the parsed key
* @curve: holds the curve
* @x: holds the x
* @y: holds the y
* @k: holds the k
*
* This function will convert the given elliptic curve parameters to the
* native #gnutls_x509_privkey_t format. The output will be stored
* in @key.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
*
* Since: 3.0
**/
int
gnutls_x509_privkey_import_ecc_raw(gnutls_x509_privkey_t key,
gnutls_ecc_curve_t curve,
const gnutls_datum_t * x,
const gnutls_datum_t * y,
const gnutls_datum_t * k)
{
int ret;
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
key->params.flags = curve;
if (_gnutls_mpi_init_scan_nz
(&key->params.params[ECC_X], x->data, x->size)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
if (_gnutls_mpi_init_scan_nz
(&key->params.params[ECC_Y], y->data, y->size)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
if (_gnutls_mpi_init_scan_nz
(&key->params.params[ECC_K], k->data, k->size)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
key->pk_algorithm = GNUTLS_PK_EC;
return 0;
cleanup:
gnutls_pk_params_clear(&key->params);
gnutls_pk_params_release(&key->params);
return ret;
}
int
_gnutls_gen_ecdh_common_client_kx_int(gnutls_session_t session,
gnutls_buffer_st * data,
gnutls_datum_t * psk_key)
{
int ret;
gnutls_datum_t out;
int curve = _gnutls_session_ecc_curve_get(session);
/* generate temporal key */
ret =
_gnutls_pk_generate_keys(GNUTLS_PK_EC, curve,
&session->key.ecdh_params);
if (ret < 0)
return gnutls_assert_val(ret);
ret =
_gnutls_ecc_ansi_x963_export(curve,
session->key.ecdh_params.
params[ECC_X] /* x */ ,
session->key.ecdh_params.
params[ECC_Y] /* y */ , &out);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_buffer_append_data_prefix(data, 8, out.data, out.size);
_gnutls_free_datum(&out);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
/* generate pre-shared key */
ret = calc_ecdh_key(session, psk_key, curve);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = data->length;
cleanup:
gnutls_pk_params_clear(&session->key.ecdh_params);
return ret;
}
int _gnutls_dh_generate_key(gnutls_dh_params_t dh_params,
gnutls_datum_t *priv_key, gnutls_datum_t *pub_key)
{
gnutls_pk_params_st params;
int ret;
gnutls_pk_params_init(¶ms);
params.params[DH_P] = _gnutls_mpi_copy(dh_params->params[0]);
params.params[DH_G] = _gnutls_mpi_copy(dh_params->params[1]);
params.params_nr = 3; /* include empty q */
params.algo = GNUTLS_PK_DH;
priv_key->data = NULL;
pub_key->data = NULL;
ret = _gnutls_pk_generate_keys(GNUTLS_PK_DH, 0, ¶ms);
if (ret < 0) {
return gnutls_assert_val(ret);
}
ret =
_gnutls_mpi_dprint_lz(params.params[DH_X], priv_key);
if (ret < 0) {
gnutls_assert();
goto fail;
}
ret =
_gnutls_mpi_dprint_lz(params.params[DH_Y], pub_key);
if (ret < 0) {
gnutls_assert();
goto fail;
}
ret = 0;
goto cleanup;
fail:
gnutls_free(pub_key->data);
gnutls_free(priv_key->data);
cleanup:
gnutls_pk_params_clear(¶ms);
return ret;
}
int _gnutls_proc_ecdh_common_client_kx(gnutls_session_t session,
uint8_t * data, size_t _data_size,
gnutls_ecc_curve_t curve,
gnutls_datum_t * psk_key)
{
ssize_t data_size = _data_size;
int ret, i = 0;
int point_size;
if (curve == GNUTLS_ECC_CURVE_INVALID)
return gnutls_assert_val(GNUTLS_E_ECC_NO_SUPPORTED_CURVES);
DECR_LEN(data_size, 1);
point_size = data[i];
i += 1;
DECR_LEN(data_size, point_size);
ret =
_gnutls_ecc_ansi_x963_import(&data[i], point_size,
&session->key.ecdh_x,
&session->key.ecdh_y);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
/* generate pre-shared key */
ret = calc_ecdh_key(session, psk_key, curve);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
cleanup:
gnutls_pk_params_clear(&session->key.ecdh_params);
return ret;
}
int
_gnutls_proc_dh_common_client_kx(gnutls_session_t session,
uint8_t * data, size_t _data_size,
bigint_t g, bigint_t p,
gnutls_datum_t * psk_key)
{
uint16_t n_Y;
size_t _n_Y;
int ret;
ssize_t data_size = _data_size;
gnutls_datum_t tmp_dh_key = {NULL, 0};
gnutls_pk_params_st peer_pub;
gnutls_pk_params_init(&peer_pub);
DECR_LEN(data_size, 2);
n_Y = _gnutls_read_uint16(&data[0]);
_n_Y = n_Y;
DECR_LEN(data_size, n_Y);
if (data_size != 0)
return gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
if (_gnutls_mpi_init_scan_nz(&session->key.client_Y, &data[2], _n_Y)) {
gnutls_assert();
return GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER; /* most likely zero or illegal size */
}
_gnutls_dh_set_peer_public(session, session->key.client_Y);
peer_pub.params[DH_Y] = session->key.client_Y;
/* calculate the key after calculating the message */
ret = _gnutls_pk_derive(GNUTLS_PK_DH, &tmp_dh_key, &session->key.dh_params, &peer_pub);
if (ret < 0) {
gnutls_assert();
goto error;
}
if (psk_key == NULL) {
session->key.key.data = tmp_dh_key.data;
session->key.key.size = tmp_dh_key.size;
} else { /* In DHE_PSK the key is set differently */
ret =
_gnutls_set_psk_session_key(session, psk_key,
&tmp_dh_key);
_gnutls_free_temp_key_datum(&tmp_dh_key);
}
if (ret < 0) {
gnutls_assert();
goto error;
}
ret = 0;
error:
_gnutls_mpi_release(&session->key.client_Y);
gnutls_pk_params_clear(&session->key.dh_params);
return ret;
}
/* Converts an ECC key to
* an internal structure (gnutls_private_key)
*/
int
_gnutls_privkey_decode_ecc_key(ASN1_TYPE* pkey_asn, const gnutls_datum_t * raw_key,
gnutls_x509_privkey_t pkey, gnutls_ecc_curve_t curve)
{
int ret;
unsigned int version;
char oid[MAX_OID_SIZE];
int oid_size;
gnutls_datum out;
gnutls_pk_params_init(&pkey->params);
pkey->params.algo = GNUTLS_PK_EC;
if ((ret =
asn1_create_element(_gnutls_get_gnutls_asn(),
"GNUTLS.ECPrivateKey",
pkey_asn)) != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(ret);
}
ret =
asn1_der_decoding(pkey_asn, raw_key->data, raw_key->size,
NULL);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(ret);
goto error;
}
ret = _gnutls_x509_read_uint(*pkey_asn, "Version", &version);
if (ret < 0) {
gnutls_assert();
goto error;
}
if (version != 1) {
_gnutls_debug_log
("ECC private key version %u is not supported\n",
version);
gnutls_assert();
ret = GNUTLS_E_ECC_UNSUPPORTED_CURVE;
goto error;
}
/* read the curve */
if (curve == GNUTLS_ECC_CURVE_INVALID) {
oid_size = sizeof(oid);
ret =
asn1_read_value(*pkey_asn, "parameters.namedCurve", oid,
&oid_size);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(ret);
goto error;
}
pkey->params.flags = _gnutls_oid_to_ecc_curve(oid);
if (pkey->params.flags == GNUTLS_ECC_CURVE_INVALID) {
_gnutls_debug_log("Curve %s is not supported\n", oid);
gnutls_assert();
ret = GNUTLS_E_ECC_UNSUPPORTED_CURVE;
goto error;
}
} else {
pkey->params.flags = curve;
}
/* read the public key */
ret = _gnutls_x509_read_value(*pkey_asn, "publicKey", &out);
if (ret < 0) {
gnutls_assert();
goto error;
}
ret =
_gnutls_ecc_ansi_x963_import(out.data, out.size,
&pkey->params.params[ECC_X],
&pkey->params.params[ECC_Y]);
_gnutls_free_datum(&out);
if (ret < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr += 2;
/* read the private key */
ret =
_gnutls_x509_read_key_int(*pkey_asn, "privateKey",
&pkey->params.params[ECC_K]);
if (ret < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
return 0;
error:
asn1_delete_structure2(pkey_asn, ASN1_DELETE_FLAG_ZEROIZE);
gnutls_pk_params_clear(&pkey->params);
gnutls_pk_params_release(&pkey->params);
return ret;
}
/* Encodes the RSA parameters into an ASN.1 RSA private key structure.
*/
static int
_gnutls_asn1_encode_rsa(ASN1_TYPE * c2, gnutls_pk_params_st * params)
{
int result, ret;
uint8_t null = '\0';
gnutls_pk_params_st pk_params;
/* we do copy the parameters into a new structure to run _gnutls_pk_fixup,
* i.e., regenerate some parameters in case they were broken */
gnutls_pk_params_init(&pk_params);
ret = _gnutls_pk_params_copy(&pk_params, params);
if (ret < 0) {
gnutls_assert();
return ret;
}
ret =
_gnutls_pk_fixup(GNUTLS_PK_RSA, GNUTLS_EXPORT, &pk_params);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
/* Ok. Now we have the data. Create the asn1 structures
*/
/* first make sure that no previously allocated data are leaked */
if (*c2 != ASN1_TYPE_EMPTY) {
asn1_delete_structure(c2);
*c2 = ASN1_TYPE_EMPTY;
}
if ((result = asn1_create_element
(_gnutls_get_gnutls_asn(), "GNUTLS.RSAPrivateKey", c2))
!= ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(result);
goto cleanup;
}
/* Write PRIME
*/
ret =
_gnutls_x509_write_int(*c2, "modulus",
params->params[RSA_MODULUS], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_x509_write_int(*c2, "publicExponent",
params->params[RSA_PUB], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_x509_write_key_int(*c2, "privateExponent",
params->params[RSA_PRIV], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_x509_write_key_int(*c2, "prime1",
params->params[RSA_PRIME1], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_x509_write_key_int(*c2, "prime2",
params->params[RSA_PRIME2], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_x509_write_key_int(*c2, "coefficient",
params->params[RSA_COEF], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_x509_write_key_int(*c2, "exponent1",
params->params[RSA_E1], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_x509_write_key_int(*c2, "exponent2",
params->params[RSA_E2], 1);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
if ((result = asn1_write_value(*c2, "otherPrimeInfos",
NULL, 0)) != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(result);
goto cleanup;
}
if ((result =
asn1_write_value(*c2, "version", &null, 1)) != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(result);
goto cleanup;
}
ret = 0;
cleanup:
if (ret < 0)
asn1_delete_structure2(c2, ASN1_DELETE_FLAG_ZEROIZE);
gnutls_pk_params_clear(&pk_params);
gnutls_pk_params_release(&pk_params);
return ret;
}
static ASN1_TYPE
decode_dsa_key(const gnutls_datum_t * raw_key, gnutls_x509_privkey_t pkey)
{
int result;
ASN1_TYPE dsa_asn;
if ((result =
asn1_create_element(_gnutls_get_gnutls_asn(),
"GNUTLS.DSAPrivateKey",
&dsa_asn)) != ASN1_SUCCESS) {
gnutls_assert();
return NULL;
}
gnutls_pk_params_init(&pkey->params);
pkey->params.algo = GNUTLS_PK_DSA;
result =
asn1_der_decoding(&dsa_asn, raw_key->data, raw_key->size,
NULL);
if (result != ASN1_SUCCESS) {
gnutls_assert();
goto error;
}
if ((result =
_gnutls_x509_read_int(dsa_asn, "p",
&pkey->params.params[0])) < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result =
_gnutls_x509_read_int(dsa_asn, "q",
&pkey->params.params[1])) < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result =
_gnutls_x509_read_int(dsa_asn, "g",
&pkey->params.params[2])) < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result =
_gnutls_x509_read_int(dsa_asn, "Y",
&pkey->params.params[3])) < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_key_int(dsa_asn, "priv",
&pkey->params.params[4])) < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
return dsa_asn;
error:
asn1_delete_structure2(&dsa_asn, ASN1_DELETE_FLAG_ZEROIZE);
gnutls_pk_params_clear(&pkey->params);
gnutls_pk_params_release(&pkey->params);
return NULL;
}
/**
* gnutls_x509_privkey_import_rsa_raw2:
* @key: The structure to store the parsed key
* @m: holds the modulus
* @e: holds the public exponent
* @d: holds the private exponent
* @p: holds the first prime (p)
* @q: holds the second prime (q)
* @u: holds the coefficient (optional)
* @e1: holds e1 = d mod (p-1) (optional)
* @e2: holds e2 = d mod (q-1) (optional)
*
* This function will convert the given RSA raw parameters to the
* native #gnutls_x509_privkey_t format. The output will be stored in
* @key.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
**/
int
gnutls_x509_privkey_import_rsa_raw2(gnutls_x509_privkey_t key,
const gnutls_datum_t * m,
const gnutls_datum_t * e,
const gnutls_datum_t * d,
const gnutls_datum_t * p,
const gnutls_datum_t * q,
const gnutls_datum_t * u,
const gnutls_datum_t * e1,
const gnutls_datum_t * e2)
{
int ret;
size_t siz = 0;
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
gnutls_pk_params_init(&key->params);
siz = m->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[0], m->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
siz = e->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[1], e->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
siz = d->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[2], d->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
siz = p->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[3], p->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
siz = q->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[4], q->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
if (u) {
siz = u->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[RSA_COEF], u->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
}
if (e1 && e2) {
siz = e1->size;
if (_gnutls_mpi_init_scan_nz
(&key->params.params[RSA_E1], e1->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
siz = e2->size;
if (_gnutls_mpi_init_scan_nz
(&key->params.params[RSA_E2], e2->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
}
ret = _gnutls_pk_fixup(GNUTLS_PK_RSA, GNUTLS_IMPORT, &key->params);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
_gnutls_asn1_encode_privkey(GNUTLS_PK_RSA, &key->key,
&key->params);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
key->params.params_nr = RSA_PRIVATE_PARAMS;
key->pk_algorithm = GNUTLS_PK_RSA;
return 0;
cleanup:
gnutls_pk_params_clear(&key->params);
gnutls_pk_params_release(&key->params);
return ret;
}
/* Extracts DSA and RSA parameters from a certificate.
*/
int
_gnutls_openpgp_privkey_get_mpis(gnutls_openpgp_privkey_t pkey,
uint32_t * keyid /*[2] */ ,
gnutls_pk_params_st * params)
{
int result;
unsigned int i, pk_algorithm;
cdk_packet_t pkt;
unsigned total;
gnutls_pk_params_init(params);
if (keyid == NULL)
pkt =
cdk_kbnode_find_packet(pkey->knode,
CDK_PKT_SECRET_KEY);
else
pkt = _gnutls_openpgp_find_key(pkey->knode, keyid, 1);
if (pkt == NULL) {
gnutls_assert();
return GNUTLS_E_OPENPGP_GETKEY_FAILED;
}
pk_algorithm =
_gnutls_openpgp_get_algo(pkt->pkt.secret_key->pk->pubkey_algo);
switch (pk_algorithm) {
case GNUTLS_PK_RSA:
/* openpgp does not hold all parameters as in PKCS #1
*/
total = RSA_PRIVATE_PARAMS - 2;
break;
case GNUTLS_PK_DSA:
total = DSA_PRIVATE_PARAMS;
break;
default:
gnutls_assert();
return GNUTLS_E_UNSUPPORTED_CERTIFICATE_TYPE;
}
for (i = 0; i < total; i++) {
result =
_gnutls_read_pgp_mpi(pkt, 1, i, ¶ms->params[i]);
if (result < 0) {
gnutls_assert();
goto error;
}
params->params_nr++;
}
/* fixup will generate exp1 and exp2 that are not
* available here.
*/
result = _gnutls_pk_fixup(pk_algorithm, GNUTLS_IMPORT, params);
if (result < 0) {
gnutls_assert();
goto error;
}
return 0;
error:
gnutls_pk_params_clear(params);
gnutls_pk_params_release(params);
return result;
}
/* Decodes a GOST privateKey from a PKCS8 structure.
*/
static int
_decode_pkcs8_gost_key(ASN1_TYPE pkcs8_asn, gnutls_x509_privkey_t pkey,
gnutls_pk_algorithm_t algo)
{
int ret;
gnutls_datum_t tmp;
unsigned char oid[3 * MAX_OID_SIZE]; /* GOST parameters can have 3 OIDs at most */
int len, result;
gnutls_pk_params_init(&pkey->params);
len = sizeof(oid);
result = asn1_read_value(pkcs8_asn, "privateKeyAlgorithm.parameters",
oid, &len);
if (result != ASN1_SUCCESS) {
gnutls_assert();
ret = GNUTLS_E_PARSING_ERROR;
goto error;
} else {
ret = _gnutls_x509_read_gost_params(oid, len, &pkey->params, algo);
if (ret < 0) {
gnutls_assert();
goto error;
}
}
/* Will be fixed later by pk_fixup */
ret = _gnutls_mpi_init(&pkey->params.params[GOST_X]);
if (ret < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
ret = _gnutls_mpi_init(&pkey->params.params[GOST_Y]);
if (ret < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
_gnutls_mpi_set_ui(pkey->params.params[GOST_X], 0);
_gnutls_mpi_set_ui(pkey->params.params[GOST_Y], 0);
ret = _gnutls_x509_read_value(pkcs8_asn, "privateKey", &tmp);
if (ret < 0) {
gnutls_assert();
goto error;
}
ret = _privkey_decode_gost_key(&tmp, pkey);
_gnutls_free_key_datum(&tmp);
if (ret < 0) {
gnutls_assert();
goto error;
}
pkey->params.algo = algo;
return 0;
error:
gnutls_pk_params_clear(&pkey->params);
gnutls_pk_params_release(&pkey->params);
return ret;
}
/**
* gnutls_x509_privkey_import_dsa_raw:
* @key: The structure to store the parsed key
* @p: holds the p
* @q: holds the q
* @g: holds the g
* @y: holds the y
* @x: holds the x
*
* This function will convert the given DSA raw parameters to the
* native #gnutls_x509_privkey_t format. The output will be stored
* in @key.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
**/
int
gnutls_x509_privkey_import_dsa_raw(gnutls_x509_privkey_t key,
const gnutls_datum_t * p,
const gnutls_datum_t * q,
const gnutls_datum_t * g,
const gnutls_datum_t * y,
const gnutls_datum_t * x)
{
int ret;
size_t siz = 0;
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
siz = p->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[0], p->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
siz = q->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[1], q->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
siz = g->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[2], g->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
siz = y->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[3], y->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
siz = x->size;
if (_gnutls_mpi_init_scan_nz(&key->params.params[4], x->data, siz)) {
gnutls_assert();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
ret =
_gnutls_asn1_encode_privkey(GNUTLS_PK_DSA, &key->key,
&key->params);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
key->params.params_nr = DSA_PRIVATE_PARAMS;
key->pk_algorithm = GNUTLS_PK_DSA;
return 0;
cleanup:
gnutls_pk_params_clear(&key->params);
gnutls_pk_params_release(&key->params);
return ret;
}
/**
* gnutls_openpgp_privkey_sign_hash:
* @key: Holds the key
* @hash: holds the data to be signed
* @signature: will contain newly allocated signature
*
* This function will sign the given hash using the private key. You
* should use gnutls_openpgp_privkey_set_preferred_key_id() before
* calling this function to set the subkey to use.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
*
* Deprecated: Use gnutls_privkey_sign_hash() instead.
*/
int
gnutls_openpgp_privkey_sign_hash(gnutls_openpgp_privkey_t key,
const gnutls_datum_t * hash,
gnutls_datum_t * signature)
{
int result;
gnutls_pk_params_st params;
int pk_algorithm;
uint8_t keyid[GNUTLS_OPENPGP_KEYID_SIZE];
char buf[2 * GNUTLS_OPENPGP_KEYID_SIZE + 1];
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
result = gnutls_openpgp_privkey_get_preferred_key_id(key, keyid);
if (result == 0) {
uint32_t kid[2];
int idx;
KEYID_IMPORT(kid, keyid);
_gnutls_hard_log("Signing using PGP key ID %s\n",
_gnutls_bin2hex(keyid,
GNUTLS_OPENPGP_KEYID_SIZE,
buf, sizeof(buf), NULL));
idx = gnutls_openpgp_privkey_get_subkey_idx(key, keyid);
pk_algorithm =
gnutls_openpgp_privkey_get_subkey_pk_algorithm(key,
idx,
NULL);
result =
_gnutls_openpgp_privkey_get_mpis(key, kid, ¶ms);
} else {
_gnutls_hard_log("Signing using master PGP key\n");
pk_algorithm =
gnutls_openpgp_privkey_get_pk_algorithm(key, NULL);
result =
_gnutls_openpgp_privkey_get_mpis(key, NULL, ¶ms);
}
if (result < 0) {
gnutls_assert();
return result;
}
result = _gnutls_pk_sign(pk_algorithm, signature, hash, ¶ms);
gnutls_pk_params_clear(¶ms);
gnutls_pk_params_release(¶ms);
if (result < 0) {
gnutls_assert();
return result;
}
return 0;
}
int _gnutls_ecdh_compute_key(gnutls_ecc_curve_t curve,
const gnutls_datum_t *x, const gnutls_datum_t *y,
const gnutls_datum_t *k,
const gnutls_datum_t *peer_x, const gnutls_datum_t *peer_y,
gnutls_datum_t *Z)
{
gnutls_pk_params_st pub, priv;
int ret;
gnutls_pk_params_init(&pub);
gnutls_pk_params_init(&priv);
pub.algo = GNUTLS_PK_EC;
pub.flags = curve;
if (_gnutls_mpi_init_scan_nz
(&pub.params[ECC_Y], peer_y->data,
peer_y->size) != 0) {
ret =
gnutls_assert_val(GNUTLS_E_MPI_SCAN_FAILED);
goto cleanup;
}
if (_gnutls_mpi_init_scan_nz
(&pub.params[ECC_X], peer_x->data,
peer_x->size) != 0) {
ret =
gnutls_assert_val(GNUTLS_E_MPI_SCAN_FAILED);
goto cleanup;
}
pub.params_nr = 2;
if (_gnutls_mpi_init_scan_nz
(&priv.params[ECC_Y], y->data,
y->size) != 0) {
ret =
gnutls_assert_val(GNUTLS_E_MPI_SCAN_FAILED);
goto cleanup;
}
if (_gnutls_mpi_init_scan_nz
(&priv.params[ECC_X], x->data,
x->size) != 0) {
ret =
gnutls_assert_val(GNUTLS_E_MPI_SCAN_FAILED);
goto cleanup;
}
if (_gnutls_mpi_init_scan_nz
(&priv.params[ECC_K], k->data,
k->size) != 0) {
ret =
gnutls_assert_val(GNUTLS_E_MPI_SCAN_FAILED);
goto cleanup;
}
priv.params_nr = 3;
priv.algo = GNUTLS_PK_EC;
priv.flags = curve;
Z->data = NULL;
ret = _gnutls_pk_derive(GNUTLS_PK_EC, Z, &priv, &pub);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = 0;
cleanup:
gnutls_pk_params_clear(&pub);
gnutls_pk_params_clear(&priv);
return ret;
}
static int
_get_sk_dsa_raw(gnutls_openpgp_privkey_t pkey,
gnutls_openpgp_keyid_t keyid, gnutls_datum_t * p,
gnutls_datum_t * q, gnutls_datum_t * g, gnutls_datum_t * y,
gnutls_datum_t * x)
{
int pk_algorithm, ret;
cdk_packet_t pkt;
uint32_t kid32[2];
gnutls_pk_params_st params;
if (pkey == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
KEYID_IMPORT(kid32, keyid);
pkt = _gnutls_openpgp_find_key(pkey->knode, kid32, 1);
if (pkt == NULL) {
gnutls_assert();
return GNUTLS_E_OPENPGP_GETKEY_FAILED;
}
pk_algorithm =
_gnutls_openpgp_get_algo(pkt->pkt.secret_key->pk->pubkey_algo);
if (pk_algorithm != GNUTLS_PK_DSA) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
ret = _gnutls_openpgp_privkey_get_mpis(pkey, kid32, ¶ms);
if (ret < 0) {
gnutls_assert();
return ret;
}
/* P */
ret = _gnutls_mpi_dprint(params.params[0], p);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
/* Q */
ret = _gnutls_mpi_dprint(params.params[1], q);
if (ret < 0) {
gnutls_assert();
_gnutls_free_datum(p);
goto cleanup;
}
/* G */
ret = _gnutls_mpi_dprint(params.params[2], g);
if (ret < 0) {
gnutls_assert();
_gnutls_free_datum(p);
_gnutls_free_datum(q);
goto cleanup;
}
/* Y */
ret = _gnutls_mpi_dprint(params.params[3], y);
if (ret < 0) {
gnutls_assert();
_gnutls_free_datum(p);
_gnutls_free_datum(g);
_gnutls_free_datum(q);
goto cleanup;
}
ret = _gnutls_mpi_dprint(params.params[4], x);
if (ret < 0) {
gnutls_assert();
_gnutls_free_datum(y);
_gnutls_free_datum(p);
_gnutls_free_datum(g);
_gnutls_free_datum(q);
goto cleanup;
}
ret = 0;
cleanup:
gnutls_pk_params_clear(¶ms);
gnutls_pk_params_release(¶ms);
return ret;
}
/* Converts an RSA PKCS#1 key to
* an internal structure (gnutls_private_key)
*/
ASN1_TYPE
_gnutls_privkey_decode_pkcs1_rsa_key(const gnutls_datum_t * raw_key,
gnutls_x509_privkey_t pkey)
{
int result;
ASN1_TYPE pkey_asn;
gnutls_pk_params_init(&pkey->params);
pkey->params.algo = GNUTLS_PK_RSA;
if ((result =
asn1_create_element(_gnutls_get_gnutls_asn(),
"GNUTLS.RSAPrivateKey",
&pkey_asn)) != ASN1_SUCCESS) {
gnutls_assert();
return NULL;
}
result =
asn1_der_decoding(&pkey_asn, raw_key->data, raw_key->size,
NULL);
if (result != ASN1_SUCCESS) {
gnutls_assert();
goto error;
}
if ((result = _gnutls_x509_read_int(pkey_asn, "modulus",
&pkey->params.params[0])) < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result =
_gnutls_x509_read_int(pkey_asn, "publicExponent",
&pkey->params.params[1])) < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result =
_gnutls_x509_read_key_int(pkey_asn, "privateExponent",
&pkey->params.params[2])) < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_key_int(pkey_asn, "prime1",
&pkey->params.params[3])) < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_key_int(pkey_asn, "prime2",
&pkey->params.params[4])) < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_key_int(pkey_asn, "coefficient",
&pkey->params.params[5])) < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_key_int(pkey_asn, "exponent1",
&pkey->params.params[6])) < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_key_int(pkey_asn, "exponent2",
&pkey->params.params[7])) < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr++;
result =
_gnutls_pk_fixup(GNUTLS_PK_RSA, GNUTLS_IMPORT, &pkey->params);
if (result < 0) {
gnutls_assert();
goto error;
}
pkey->params.params_nr = RSA_PRIVATE_PARAMS;
return pkey_asn;
error:
asn1_delete_structure2(&pkey_asn, ASN1_DELETE_FLAG_ZEROIZE);
gnutls_pk_params_clear(&pkey->params);
gnutls_pk_params_release(&pkey->params);
return NULL;
}
