/*-
* _gnutls_pkcs11_privkey_sign_hash:
* @key: Holds the key
* @hash: holds the data to be signed (should be output of a hash)
* @signature: will contain the signature allocated with gnutls_malloc()
*
* This function will sign the given data using a signature algorithm
* supported by the private key. It is assumed that the given data
* are the output of a hash function.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
-*/
int
_gnutls_pkcs11_privkey_sign_hash(gnutls_pkcs11_privkey_t key,
const gnutls_datum_t * hash,
gnutls_datum_t * signature)
{
ck_rv_t rv;
int ret;
struct ck_mechanism mech;
gnutls_datum_t tmp = { NULL, 0 };
unsigned long siglen;
struct pkcs11_session_info _sinfo;
struct pkcs11_session_info *sinfo;
ck_object_handle_t obj;
PKCS11_CHECK_INIT;
if (key->sinfo.init != 0) {
sinfo = &key->sinfo;
obj = key->obj;
} else {
sinfo = &_sinfo;
memset(sinfo, 0, sizeof(*sinfo));
FIND_OBJECT(sinfo, &key->pin, obj, key);
}
mech.mechanism = pk_to_mech(key->pk_algorithm);
mech.parameter = NULL;
mech.parameter_len = 0;
/* Initialize signing operation; using the private key discovered
* earlier. */
rv = pkcs11_sign_init(sinfo->module, sinfo->pks, &mech, obj);
if (rv != CKR_OK) {
gnutls_assert();
ret = pkcs11_rv_to_err(rv);
goto cleanup;
}
/* Work out how long the signature must be: */
rv = pkcs11_sign(sinfo->module, sinfo->pks, hash->data, hash->size,
NULL, &siglen);
if (rv != CKR_OK) {
gnutls_assert();
ret = pkcs11_rv_to_err(rv);
goto cleanup;
}
tmp.data = gnutls_malloc(siglen);
tmp.size = siglen;
rv = pkcs11_sign(sinfo->module, sinfo->pks, hash->data, hash->size,
tmp.data, &siglen);
if (rv != CKR_OK) {
gnutls_assert();
ret = pkcs11_rv_to_err(rv);
goto cleanup;
}
if (key->pk_algorithm == GNUTLS_PK_EC
|| key->pk_algorithm == GNUTLS_PK_DSA) {
unsigned int hlen = siglen / 2;
gnutls_datum_t r, s;
if (siglen % 2 != 0) {
gnutls_assert();
ret = GNUTLS_E_PK_SIGN_FAILED;
goto cleanup;
}
r.data = tmp.data;
r.size = hlen;
s.data = &tmp.data[hlen];
s.size = hlen;
ret = _gnutls_encode_ber_rs_raw(signature, &r, &s);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
gnutls_free(tmp.data);
tmp.data = NULL;
} else {
signature->size = siglen;
signature->data = tmp.data;
}
ret = 0;
cleanup:
if (sinfo != &key->sinfo)
pkcs11_close_session(sinfo);
if (ret < 0)
gnutls_free(tmp.data);
return ret;
}
/*-
* _gnutls_pkcs11_privkey_sign_hash:
* @key: Holds the key
* @hash: holds the data to be signed (should be output of a hash)
* @signature: will contain the signature allocated with gnutls_malloc()
*
* This function will sign the given data using a signature algorithm
* supported by the private key. It is assumed that the given data
* are the output of a hash function.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
-*/
int
_gnutls_pkcs11_privkey_sign_hash(gnutls_pkcs11_privkey_t key,
const gnutls_datum_t * hash,
gnutls_datum_t * signature)
{
ck_rv_t rv;
int ret;
struct ck_mechanism mech;
gnutls_datum_t tmp = { NULL, 0 };
unsigned long siglen;
struct pkcs11_session_info *sinfo;
unsigned req_login = 0;
unsigned login_flags = SESSION_LOGIN|SESSION_CONTEXT_SPECIFIC;
PKCS11_CHECK_INIT_PRIVKEY(key);
sinfo = &key->sinfo;
mech.mechanism = pk_to_mech(key->pk_algorithm);
mech.parameter = NULL;
mech.parameter_len = 0;
ret = gnutls_mutex_lock(&key->mutex);
if (ret != 0)
return gnutls_assert_val(GNUTLS_E_LOCKING_ERROR);
/* Initialize signing operation; using the private key discovered
* earlier. */
REPEAT_ON_INVALID_HANDLE(rv = pkcs11_sign_init(sinfo->module, sinfo->pks, &mech, key->ref));
if (rv != CKR_OK) {
gnutls_assert();
ret = pkcs11_rv_to_err(rv);
goto cleanup;
}
retry_login:
if (key->reauth || req_login) {
if (req_login)
login_flags = SESSION_LOGIN|SESSION_FORCE_LOGIN;
ret =
pkcs11_login(&key->sinfo, &key->pin,
key->uinfo, login_flags);
if (ret < 0) {
gnutls_assert();
_gnutls_debug_log("PKCS #11 login failed, trying operation anyway\n");
/* let's try the operation anyway */
}
}
/* Work out how long the signature must be: */
rv = pkcs11_sign(sinfo->module, sinfo->pks, hash->data, hash->size,
NULL, &siglen);
if (unlikely(rv == CKR_USER_NOT_LOGGED_IN && req_login == 0)) {
req_login = 1;
goto retry_login;
}
if (rv != CKR_OK) {
gnutls_assert();
ret = pkcs11_rv_to_err(rv);
goto cleanup;
}
tmp.data = gnutls_malloc(siglen);
tmp.size = siglen;
rv = pkcs11_sign(sinfo->module, sinfo->pks, hash->data, hash->size,
tmp.data, &siglen);
if (rv != CKR_OK) {
gnutls_assert();
ret = pkcs11_rv_to_err(rv);
goto cleanup;
}
if (key->pk_algorithm == GNUTLS_PK_EC
|| key->pk_algorithm == GNUTLS_PK_DSA) {
unsigned int hlen = siglen / 2;
gnutls_datum_t r, s;
if (siglen % 2 != 0) {
gnutls_assert();
ret = GNUTLS_E_PK_SIGN_FAILED;
goto cleanup;
}
r.data = tmp.data;
r.size = hlen;
s.data = &tmp.data[hlen];
s.size = hlen;
ret = _gnutls_encode_ber_rs_raw(signature, &r, &s);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
gnutls_free(tmp.data);
tmp.data = NULL;
} else {
signature->size = siglen;
signature->data = tmp.data;
}
ret = 0;
cleanup:
gnutls_mutex_unlock(&key->mutex);
if (sinfo != &key->sinfo)
pkcs11_close_session(sinfo);
if (ret < 0)
gnutls_free(tmp.data);
return ret;
}
/*-
* _gnutls_pkcs11_privkey_sign_hash:
* @key: Holds the key
* @hash: holds the data to be signed (should be output of a hash)
* @signature: will contain the signature allocated with gnutls_malloc()
*
* This function will sign the given data using a signature algorithm
* supported by the private key. It is assumed that the given data
* are the output of a hash function.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
* negative error value.
-*/
int
_gnutls_pkcs11_privkey_sign_hash (gnutls_pkcs11_privkey_t key,
const gnutls_datum_t * hash,
gnutls_datum_t * signature)
{
ck_rv_t rv;
int ret;
struct ck_mechanism mech;
unsigned long siglen;
struct ck_function_list *module;
ck_session_handle_t pks;
ck_object_handle_t obj;
FIND_OBJECT (module, pks, obj, key);
mech.mechanism = pk_to_mech(key->pk_algorithm);
mech.parameter = NULL;
mech.parameter_len = 0;
/* Initialize signing operation; using the private key discovered
* earlier. */
rv = pkcs11_sign_init (module, pks, &mech, obj);
if (rv != CKR_OK)
{
gnutls_assert ();
ret = pkcs11_rv_to_err (rv);
goto cleanup;
}
/* Work out how long the signature must be: */
rv = pkcs11_sign (module, pks, hash->data, hash->size, NULL, &siglen);
if (rv != CKR_OK)
{
gnutls_assert ();
ret = pkcs11_rv_to_err (rv);
goto cleanup;
}
signature->data = gnutls_malloc (siglen);
signature->size = siglen;
rv = pkcs11_sign (module, pks, hash->data, hash->size, signature->data, &siglen);
if (rv != CKR_OK)
{
gnutls_free (signature->data);
gnutls_assert ();
ret = pkcs11_rv_to_err (rv);
goto cleanup;
}
signature->size = siglen;
if (key->pk_algorithm == GNUTLS_PK_EC || key->pk_algorithm == GNUTLS_PK_DSA)
{
bigint_t r,s;
if (siglen % 2 != 0)
{
gnutls_assert();
ret = GNUTLS_E_PK_SIGN_FAILED;
goto cleanup;
}
ret = read_rs(&r, &s, signature->data, signature->size);
if (ret < 0)
{
gnutls_assert();
goto cleanup;
}
gnutls_free(signature->data);
ret = _gnutls_encode_ber_rs (signature, r, s);
_gnutls_mpi_release(&r);
_gnutls_mpi_release(&s);
if (ret < 0)
{
gnutls_assert();
goto cleanup;
}
}
ret = 0;
cleanup:
pkcs11_close_session (module, pks);
return ret;
}
