static void deinit_keys(gnutls_session_t session)
{
gnutls_pk_params_release(&session->key.ecdh_params);
gnutls_pk_params_release(&session->key.dh_params);
zrelease_temp_mpi_key(&session->key.ecdh_x);
zrelease_temp_mpi_key(&session->key.ecdh_y);
_gnutls_free_temp_key_datum(&session->key.ecdhx);
zrelease_temp_mpi_key(&session->key.client_Y);
/* SRP */
zrelease_temp_mpi_key(&session->key.srp_p);
zrelease_temp_mpi_key(&session->key.srp_g);
zrelease_temp_mpi_key(&session->key.srp_key);
zrelease_temp_mpi_key(&session->key.u);
zrelease_temp_mpi_key(&session->key.a);
zrelease_temp_mpi_key(&session->key.x);
zrelease_temp_mpi_key(&session->key.A);
zrelease_temp_mpi_key(&session->key.B);
zrelease_temp_mpi_key(&session->key.b);
_gnutls_free_temp_key_datum(&session->key.key);
_gnutls_free_temp_key_datum(&session->key.key);
}
/**
* gnutls_privkey_export_ecc_raw:
* @key: Holds the public key
* @curve: will hold the curve
* @x: will hold the x coordinate
* @y: will hold the y coordinate
* @k: will hold the private key
*
* This function will export the ECC private key's parameters found
* in the given structure. The new parameters will be allocated using
* gnutls_malloc() and will be stored in the appropriate datum.
*
* Returns: %GNUTLS_E_SUCCESS on success, otherwise a negative error code.
*
* Since: 3.3.0
**/
int
gnutls_privkey_export_ecc_raw(gnutls_privkey_t 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;
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
gnutls_pk_params_init(¶ms);
ret = _gnutls_privkey_get_mpis(key, ¶ms);
if (ret < 0)
return gnutls_assert_val(ret);
ret = _gnutls_params_get_ecc_raw(¶ms, curve, x, y, k);
gnutls_pk_params_release(¶ms);
return ret;
}
/**
* gnutls_privkey_export_dsa_raw:
* @key: Holds the public key
* @p: will hold the p
* @q: will hold the q
* @g: will hold the g
* @y: will hold the y
* @x: will hold the x
*
* This function will export the DSA private key's parameters found
* in the given structure. The new parameters will be allocated using
* gnutls_malloc() and will be stored in the appropriate datum.
*
* Returns: %GNUTLS_E_SUCCESS on success, otherwise a negative error code.
*
* Since: 3.3.0
**/
int
gnutls_privkey_export_dsa_raw(gnutls_privkey_t key,
gnutls_datum_t * p, gnutls_datum_t * q,
gnutls_datum_t * g, gnutls_datum_t * y,
gnutls_datum_t * x)
{
gnutls_pk_params_st params;
int ret;
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
gnutls_pk_params_init(¶ms);
ret = _gnutls_privkey_get_mpis(key, ¶ms);
if (ret < 0)
return gnutls_assert_val(ret);
ret = _gnutls_params_get_dsa_raw(¶ms, p, q, g, y, x);
gnutls_pk_params_release(¶ms);
return ret;
}
/**
* gnutls_deinit:
* @session: is a #gnutls_session_t structure.
*
* This function clears all buffers associated with the @session.
* This function will also remove session data from the session
* database if the session was terminated abnormally.
**/
void
gnutls_deinit (gnutls_session_t session)
{
unsigned int i;
if (session == NULL)
return;
_gnutls_rnd_refresh();
/* remove auth info firstly */
_gnutls_free_auth_info (session);
_gnutls_handshake_internal_state_clear (session);
_gnutls_handshake_io_buffer_clear (session);
_gnutls_ext_free_session_data (session);
for (i = 0; i < MAX_EPOCH_INDEX; i++)
if (session->record_parameters[i] != NULL)
{
_gnutls_epoch_free (session, session->record_parameters[i]);
session->record_parameters[i] = NULL;
}
_gnutls_buffer_clear (&session->internals.handshake_hash_buffer);
_gnutls_buffer_clear (&session->internals.hb_remote_data);
_gnutls_buffer_clear (&session->internals.hb_local_data);
_gnutls_buffer_clear (&session->internals.record_presend_buffer);
_mbuffer_head_clear (&session->internals.record_buffer);
_mbuffer_head_clear (&session->internals.record_recv_buffer);
_mbuffer_head_clear (&session->internals.record_send_buffer);
gnutls_credentials_clear (session);
_gnutls_selected_certs_deinit (session);
gnutls_pk_params_release(&session->key.ecdh_params);
_gnutls_mpi_release (&session->key.ecdh_x);
_gnutls_mpi_release (&session->key.ecdh_y);
_gnutls_mpi_release (&session->key.KEY);
_gnutls_mpi_release (&session->key.client_Y);
_gnutls_mpi_release (&session->key.client_p);
_gnutls_mpi_release (&session->key.client_g);
_gnutls_mpi_release (&session->key.u);
_gnutls_mpi_release (&session->key.a);
_gnutls_mpi_release (&session->key.x);
_gnutls_mpi_release (&session->key.A);
_gnutls_mpi_release (&session->key.B);
_gnutls_mpi_release (&session->key.b);
/* RSA */
_gnutls_mpi_release (&session->key.rsa[0]);
_gnutls_mpi_release (&session->key.rsa[1]);
_gnutls_mpi_release (&session->key.dh_secret);
gnutls_free (session);
}
static
int set_dh_pk_params(gnutls_session_t session, bigint_t g, bigint_t p,
unsigned q_bits)
{
/* just in case we are resuming a session */
gnutls_pk_params_release(&session->key.proto.tls12.dh.params);
gnutls_pk_params_init(&session->key.proto.tls12.dh.params);
session->key.proto.tls12.dh.params.params[DH_G] = _gnutls_mpi_copy(g);
if (session->key.proto.tls12.dh.params.params[DH_G] == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
session->key.proto.tls12.dh.params.params[DH_P] = _gnutls_mpi_copy(p);
if (session->key.proto.tls12.dh.params.params[DH_P] == NULL) {
_gnutls_mpi_release(&session->key.proto.tls12.dh.params.params[DH_G]);
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
}
session->key.proto.tls12.dh.params.params_nr = 3; /* include empty q */
session->key.proto.tls12.dh.params.algo = GNUTLS_PK_DH;
session->key.proto.tls12.dh.params.qbits = q_bits;
return 0;
}
/* verifies if the certificate is properly signed.
* returns GNUTLS_E_PK_VERIFY_SIG_FAILED on failure and 1 on success.
*
* 'data' is the signed data
* 'signature' is the signature!
*/
int
_gnutls_x509_verify_data (gnutls_digest_algorithm_t algo,
const gnutls_datum_t * data,
const gnutls_datum_t * signature,
gnutls_x509_crt_t issuer)
{
gnutls_pk_params_st issuer_params;
int ret;
/* Read the MPI parameters from the issuer's certificate.
*/
ret =
_gnutls_x509_crt_get_mpis (issuer, &issuer_params);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret =
pubkey_verify_data (gnutls_x509_crt_get_pk_algorithm (issuer, NULL), algo,
data, signature, &issuer_params);
if (ret < 0)
{
gnutls_assert ();
}
/* release all allocated MPIs
*/
gnutls_pk_params_release(&issuer_params);
return ret;
}
/**
* gnutls_pubkey_deinit:
* @key: The key to be deinitialized
*
* This function will deinitialize a public key structure.
*
* Since: 2.12.0
**/
void gnutls_pubkey_deinit(gnutls_pubkey_t key)
{
if (!key)
return;
gnutls_pk_params_release(&key->params);
gnutls_free(key);
}
/* some generic pk functions */
static int
_generate_params (int algo, bigint_t * resarr, unsigned int *resarr_len,
int bits)
{
gnutls_pk_params_st params;
int ret;
unsigned int i;
ret = _gnutls_pk_ops.generate (algo, bits, ¶ms);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
if (resarr && resarr_len && *resarr_len >= params.params_nr)
{
*resarr_len = params.params_nr;
for (i = 0; i < params.params_nr; i++)
resarr[i] = params.params[i];
}
else
{
gnutls_pk_params_release(¶ms);
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
return 0;
}
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;
}
/**
* gnutls_privkey_export_rsa_raw:
* @key: Holds the certificate
* @m: will hold the modulus
* @e: will hold the public exponent
* @d: will hold the private exponent
* @p: will hold the first prime (p)
* @q: will hold the second prime (q)
* @u: will hold the coefficient
* @e1: will hold e1 = d mod (p-1)
* @e2: will hold e2 = d mod (q-1)
*
* This function will export the RSA private key's parameters found
* in the given structure. The new parameters will be allocated using
* gnutls_malloc() and will be stored in the appropriate datum.
*
* Returns: %GNUTLS_E_SUCCESS on success, otherwise a negative error code.
*
* Since: 3.3.0
**/
int
gnutls_privkey_export_rsa_raw(gnutls_privkey_t key,
gnutls_datum_t * m, gnutls_datum_t * e,
gnutls_datum_t * d, gnutls_datum_t * p,
gnutls_datum_t * q, gnutls_datum_t * u,
gnutls_datum_t * e1,
gnutls_datum_t * e2)
{
gnutls_pk_params_st params;
int ret;
if (key == NULL) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
gnutls_pk_params_init(¶ms);
ret = _gnutls_privkey_get_mpis(key, ¶ms);
if (ret < 0)
return gnutls_assert_val(ret);
ret = _gnutls_params_get_rsa_raw(¶ms, m, e, d, p, q, u, e1, e2);
gnutls_pk_params_release(¶ms);
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;
}
/**
* 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;
}
/* Returns the public key of the private key (if possible)
*/
int
_gnutls_privkey_get_public_mpis(gnutls_privkey_t key,
gnutls_pk_params_st * params)
{
int ret;
gnutls_pk_algorithm_t pk =
gnutls_privkey_get_pk_algorithm(key, NULL);
switch (key->type) {
#ifdef ENABLE_OPENPGP
case GNUTLS_PRIVKEY_OPENPGP:
{
gnutls_pk_params_st tmp_params;
uint32_t kid[2];
uint8_t keyid[GNUTLS_OPENPGP_KEYID_SIZE];
ret =
gnutls_openpgp_privkey_get_preferred_key_id
(key->key.openpgp, keyid);
if (ret == 0) {
KEYID_IMPORT(kid, keyid);
ret =
_gnutls_openpgp_privkey_get_mpis(key->
key.
openpgp,
kid,
&tmp_params);
} else
ret =
_gnutls_openpgp_privkey_get_mpis(key->
key.
openpgp,
NULL,
&tmp_params);
if (ret < 0) {
gnutls_assert();
return ret;
}
ret = privkey_to_pubkey(pk, &tmp_params, params);
gnutls_pk_params_release(&tmp_params);
}
break;
#endif
case GNUTLS_PRIVKEY_X509:
ret = privkey_to_pubkey(pk,
&key->key.x509->params, params);
break;
default:
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
return ret;
}
/* If the psk flag is set, then an empty psk_identity_hint will
* be inserted */
int _gnutls_ecdh_common_print_server_kx(gnutls_session_t session,
gnutls_buffer_st * data,
gnutls_ecc_curve_t curve)
{
uint8_t p;
int ret;
gnutls_datum_t out;
if (curve == GNUTLS_ECC_CURVE_INVALID)
return gnutls_assert_val(GNUTLS_E_ECC_NO_SUPPORTED_CURVES);
/* just in case we are resuming a session */
gnutls_pk_params_release(&session->key.ecdh_params);
gnutls_pk_params_init(&session->key.ecdh_params);
/* curve type */
p = 3;
ret = _gnutls_buffer_append_data(data, &p, 1);
if (ret < 0)
return gnutls_assert_val(ret);
ret =
_gnutls_buffer_append_prefix(data, 16,
_gnutls_ecc_curve_get_tls_id
(curve));
if (ret < 0)
return gnutls_assert_val(ret);
/* 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)
return gnutls_assert_val(ret);
ret =
_gnutls_buffer_append_data_prefix(data, 8, out.data, out.size);
_gnutls_free_datum(&out);
if (ret < 0)
return gnutls_assert_val(ret);
return data->length;
}
/**
* gnutls_x509_privkey_deinit:
* @key: The structure to be deinitialized
*
* This function will deinitialize a private key structure.
**/
void
gnutls_x509_privkey_deinit (gnutls_x509_privkey_t key)
{
if (!key)
return;
gnutls_pk_params_release(&key->params);
asn1_delete_structure (&key->key);
gnutls_free (key);
}
/**
* 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;
ret = _gnutls_ecc_curve_fill_params(curve, &key->params);
if (ret < 0)
return gnutls_assert_val(ret);
if (_gnutls_mpi_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_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_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_release(&key->params);
return ret;
}
/**
* gnutls_pubkey_import_privkey:
* @key: The public key
* @pkey: The private key
* @usage: GNUTLS_KEY_* key usage flags.
* @flags: should be zero
*
* Imports the public key from a private. This function will import
* the given public key to the abstract #gnutls_pubkey_t type.
*
* Note that in certain keys this operation may not be possible, e.g.,
* in other than RSA PKCS#11 keys.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
*
* Since: 2.12.0
**/
int
gnutls_pubkey_import_privkey(gnutls_pubkey_t key, gnutls_privkey_t pkey,
unsigned int usage, unsigned int flags)
{
gnutls_pk_params_release(&key->params);
gnutls_pk_params_init(&key->params);
key->pk_algorithm =
gnutls_privkey_get_pk_algorithm(pkey, &key->bits);
key->key_usage = usage;
return _gnutls_privkey_get_public_mpis(pkey, &key->params);
}
static int calc_ecdh_key( gnutls_session_t session, gnutls_datum_t * psk_key)
{
gnutls_pk_params_st pub;
int ret;
memset(&pub,0,sizeof(pub));
pub.params[ECC_PRIME] = session->key.ecdh_params.params[ECC_PRIME];
pub.params[ECC_ORDER] = session->key.ecdh_params.params[ECC_ORDER];
pub.params[ECC_A] = session->key.ecdh_params.params[ECC_A];
pub.params[ECC_B] = session->key.ecdh_params.params[ECC_B];
pub.params[ECC_GX] = session->key.ecdh_params.params[ECC_GX];
pub.params[ECC_GY] = session->key.ecdh_params.params[ECC_GY];
pub.params[ECC_X] = session->key.ecdh_x;
pub.params[ECC_Y] = session->key.ecdh_y;
if (psk_key == NULL)
ret = _gnutls_pk_derive(GNUTLS_PK_EC, &session->key.key, &session->key.ecdh_params, &pub);
else
{
gnutls_datum_t tmp_dh_key;
ret = _gnutls_pk_derive(GNUTLS_PK_EC, &tmp_dh_key, &session->key.ecdh_params, &pub);
if (ret < 0)
{
ret = gnutls_assert_val(ret);
goto cleanup;
}
ret = _gnutls_set_psk_session_key (session, psk_key, &tmp_dh_key);
_gnutls_free_datum (&tmp_dh_key);
}
if (ret < 0)
{
ret = gnutls_assert_val(ret);
goto cleanup;
}
ret = 0;
cleanup:
/* no longer needed */
_gnutls_mpi_release (&session->key.ecdh_x);
_gnutls_mpi_release (&session->key.ecdh_y);
gnutls_pk_params_release( &session->key.ecdh_params);
return ret;
}
static int calc_ecdh_key(gnutls_session_t session,
gnutls_datum_t * psk_key,
gnutls_ecc_curve_t curve)
{
gnutls_pk_params_st pub;
int ret;
gnutls_pk_params_init(&pub);
pub.params[ECC_X] = session->key.ecdh_x;
pub.params[ECC_Y] = session->key.ecdh_y;
pub.flags = curve;
if (psk_key == NULL) {
ret =
_gnutls_pk_derive(GNUTLS_PK_EC, &session->key.key,
&session->key.ecdh_params, &pub);
} else {
gnutls_datum_t tmp_dh_key;
ret =
_gnutls_pk_derive(GNUTLS_PK_EC, &tmp_dh_key,
&session->key.ecdh_params, &pub);
if (ret < 0) {
ret = gnutls_assert_val(ret);
goto cleanup;
}
ret =
_gnutls_set_psk_session_key(session, psk_key,
&tmp_dh_key);
_gnutls_free_temp_key_datum(&tmp_dh_key);
}
if (ret < 0) {
ret = gnutls_assert_val(ret);
goto cleanup;
}
ret = 0;
cleanup:
/* no longer needed */
_gnutls_mpi_release(&session->key.ecdh_x);
_gnutls_mpi_release(&session->key.ecdh_y);
gnutls_pk_params_release(&session->key.ecdh_params);
return ret;
}
/* Reads and returns the PK algorithm of the given certificate-like
* ASN.1 structure. src_name should be something like "tbsCertificate.subjectPublicKeyInfo".
*/
int
_gnutls_x509_get_pk_algorithm (ASN1_TYPE src, const char *src_name,
unsigned int *bits)
{
int result;
int algo;
char oid[64];
int len;
gnutls_pk_params_st params;
char name[128];
gnutls_pk_params_init(¶ms);
_asnstr_append_name (name, sizeof (name), src_name, ".algorithm.algorithm");
len = sizeof (oid);
result = asn1_read_value (src, name, oid, &len);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
return _gnutls_asn2err (result);
}
algo = _gnutls_x509_oid2pk_algorithm (oid);
if (algo == GNUTLS_PK_UNKNOWN)
{
_gnutls_debug_log
("%s: unknown public key algorithm: %s\n", __func__, oid);
}
if (bits == NULL)
{
return algo;
}
/* Now read the parameters' bits
*/
result = _gnutls_get_asn_mpis(src, src_name, ¶ms);
if (result < 0)
return gnutls_assert_val(result);
bits[0] = pubkey_to_bits(algo, ¶ms);
gnutls_pk_params_release(¶ms);
return algo;
}
int
_gnutls_proc_ecdh_common_server_kx(gnutls_session_t session,
uint8_t * data, size_t _data_size)
{
int i, ret, point_size;
gnutls_ecc_curve_t curve;
ssize_t data_size = _data_size;
/* just in case we are resuming a session */
gnutls_pk_params_release(&session->key.ecdh_params);
gnutls_pk_params_init(&session->key.ecdh_params);
i = 0;
DECR_LEN(data_size, 1);
if (data[i++] != 3)
return gnutls_assert_val(GNUTLS_E_ECC_NO_SUPPORTED_CURVES);
DECR_LEN(data_size, 2);
curve = _gnutls_tls_id_to_ecc_curve(_gnutls_read_uint16(&data[i]));
i += 2;
ret = _gnutls_session_supports_ecc_curve(session, curve);
if (ret < 0)
return gnutls_assert_val(ret);
_gnutls_session_ecc_curve_set(session, curve);
DECR_LEN(data_size, 1);
point_size = data[i];
i++;
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)
return gnutls_assert_val(ret);
i += point_size;
return i;
}
/**
* 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.
*
* 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)
bits = _gnutls_ecc_bits_to_curve(bits);
ret = _gnutls_pk_generate (algo, bits, &key->params);
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_release(&key->params);
return ret;
}
/**
* gnutls_privkey_verify_params:
* @key: should contain a #gnutls_privkey_t type
*
* This function will verify the private key parameters.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
*
* Since: 3.3.0
**/
int gnutls_privkey_verify_params(gnutls_privkey_t key)
{
gnutls_pk_params_st params;
int ret;
gnutls_pk_params_init(¶ms);
ret = _gnutls_privkey_get_mpis(key, ¶ms);
if (ret < 0)
return gnutls_assert_val(ret);
ret = _gnutls_pk_verify_priv_params(key->pk_algorithm, ¶ms);
gnutls_pk_params_release(¶ms);
if (ret < 0) {
gnutls_assert();
return ret;
}
return 0;
}
int
_gnutls_privkey_get_public_mpis(gnutls_privkey_t key,
gnutls_pk_params_st * params)
{
int ret;
gnutls_pk_params_st tmp1;
gnutls_pk_params_init(&tmp1);
ret = _gnutls_privkey_get_mpis(key, &tmp1);
if (ret < 0)
return gnutls_assert_val(ret);
ret = privkey_to_pubkey(key->pk_algorithm, &tmp1, params);
gnutls_pk_params_release(&tmp1);
if (ret < 0)
gnutls_assert();
return ret;
}
/**
* gnutls_pubkey_import_x509_crq:
* @key: The public key
* @crq: The certificate to be imported
* @flags: should be zero
*
* This function will import the given public key to the abstract
* #gnutls_pubkey_t type.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
*
* Since: 3.1.5
**/
int
gnutls_pubkey_import_x509_crq(gnutls_pubkey_t key, gnutls_x509_crq_t crq,
unsigned int flags)
{
int ret;
gnutls_pk_params_release(&key->params);
/* params initialized in _gnutls_x509_crq_get_mpis */
key->pk_algorithm =
gnutls_x509_crq_get_pk_algorithm(crq, &key->bits);
ret = gnutls_x509_crq_get_key_usage(crq, &key->key_usage, NULL);
if (ret < 0)
key->key_usage = 0;
ret = _gnutls_x509_crq_get_mpis(crq, &key->params);
if (ret < 0) {
gnutls_assert();
return ret;
}
return 0;
}
/**
* 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_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_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_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_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_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_release(&key->params);
return ret;
}
/**
* 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
* @e1: holds e1 = d mod (p-1)
* @e2: holds e2 = d mod (q-1)
*
* 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_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_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_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_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_scan_nz (&key->params.params[4], q->data, siz))
{
gnutls_assert ();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
siz = u->size;
if (_gnutls_mpi_scan_nz (&key->params.params[5], 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_scan_nz (&key->params.params[6], e1->data, siz))
{
gnutls_assert ();
ret = GNUTLS_E_MPI_SCAN_FAILED;
goto cleanup;
}
key->params.params_nr++;
siz = e2->size;
if (_gnutls_mpi_scan_nz (&key->params.params[7], 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_release(&key->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;
}
pkey->params.params_nr = 0;
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_int (dsa_asn, "priv",
&pkey->params.params[4])) < 0)
{
gnutls_assert ();
goto error;
}
pkey->params.params_nr++;
return dsa_asn;
error:
asn1_delete_structure (&dsa_asn);
gnutls_pk_params_release(&pkey->params);
return NULL;
}
/* Converts an ECC key to
* an internal structure (gnutls_private_key)
*/
ASN1_TYPE
_gnutls_privkey_decode_ecc_key (const gnutls_datum_t * raw_key,
gnutls_x509_privkey_t pkey)
{
int ret;
ASN1_TYPE pkey_asn;
unsigned int version;
char oid[MAX_OID_SIZE];
int oid_size;
gnutls_datum out;
gnutls_pk_params_init(&pkey->params);
if ((ret =
asn1_create_element (_gnutls_get_gnutls_asn (),
"GNUTLS.ECPrivateKey",
&pkey_asn)) != ASN1_SUCCESS)
{
gnutls_assert ();
return NULL;
}
ret = asn1_der_decoding (&pkey_asn, raw_key->data, raw_key->size, NULL);
if (ret != ASN1_SUCCESS)
{
gnutls_assert ();
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();
goto error;
}
/* read the curve */
oid_size = sizeof(oid);
ret = asn1_read_value(pkey_asn, "parameters.namedCurve", oid, &oid_size);
if (ret != ASN1_SUCCESS)
{
gnutls_assert ();
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();
goto error;
}
ret = _gnutls_ecc_curve_fill_params(pkey->params.flags, &pkey->params);
if (ret < 0)
{
gnutls_assert();
goto error;
}
/* read the public key */
ret = _gnutls_x509_read_value(pkey_asn, "publicKey", &out, 2);
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_int (pkey_asn, "privateKey", &pkey->params.params[ECC_K]);
if (ret < 0)
{
gnutls_assert();
goto error;
}
pkey->params.params_nr ++;
return pkey_asn;
error:
asn1_delete_structure (&pkey_asn);
gnutls_pk_params_release (&pkey->params);
return NULL;
}
/* 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);
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_int (pkey_asn, "privateExponent",
&pkey->params.params[2])) < 0)
{
gnutls_assert ();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_int (pkey_asn, "prime1",
&pkey->params.params[3])) < 0)
{
gnutls_assert ();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_int (pkey_asn, "prime2",
&pkey->params.params[4])) < 0)
{
gnutls_assert ();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_int (pkey_asn, "coefficient",
&pkey->params.params[5])) < 0)
{
gnutls_assert ();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_int (pkey_asn, "exponent1",
&pkey->params.params[6])) < 0)
{
gnutls_assert ();
goto error;
}
pkey->params.params_nr++;
if ((result = _gnutls_x509_read_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_structure (&pkey_asn);
gnutls_pk_params_release (&pkey->params);
return NULL;
}