/**
* gnutls_rnd:
* @level: a security level
* @data: place to store random bytes
* @len: The requested size
*
* This function will generate random data and store it to output
* buffer. The value of @level should be one of %GNUTLS_RND_NONCE,
* %GNUTLS_RND_RANDOM and %GNUTLS_RND_KEY. See the manual and
* %gnutls_rnd_level_t for detailed information.
*
* This function is thread-safe and also fork-safe.
*
* Returns: Zero on success, or a negative error code on error.
*
* Since: 2.12.0
**/
int gnutls_rnd(gnutls_rnd_level_t level, void *data, size_t len)
{
int ret;
FAIL_IF_LIB_ERROR;
if (unlikely((ret=_gnutls_rnd_init()) < 0))
return gnutls_assert_val(ret);
if (likely(len > 0)) {
return _gnutls_rnd_ops.rnd(gnutls_rnd_ctx, level, data,
len);
}
return 0;
}
/**
* gnutls_global_init:
*
* This function initializes the global data to defaults. Every
* gnutls application has a global data which holds common parameters
* shared by gnutls session structures. You should call
* gnutls_global_deinit() when gnutls usage is no longer needed
*
* Note that this function will also initialize libgcrypt, if it has
* not been initialized before. Thus if you want to manually
* initialize libgcrypt you must do it before calling this function.
* This is useful in cases you want to disable libgcrypt's internal
* lockings etc.
*
* This function increment a global counter, so that
* gnutls_global_deinit() only releases resources when it has been
* called as many times as gnutls_global_init(). This is useful when
* GnuTLS is used by more than one library in an application. This
* function can be called many times, but will only do something the
* first time.
*
* Note! This function is not thread safe. If two threads call this
* function simultaneously, they can cause a race between checking
* the global counter and incrementing it, causing both threads to
* execute the library initialization code. That would lead to a
* memory leak. To handle this, your application could invoke this
* function after aquiring a thread mutex. To ignore the potential
* memory leak is also an option.
*
* Returns: On success, %GNUTLS_E_SUCCESS (zero) is returned,
* otherwise an error code is returned.
**/
int
gnutls_global_init (void)
{
int result = 0;
int res;
if (_gnutls_init++)
goto out;
if (gl_sockets_startup (SOCKETS_1_1))
return GNUTLS_E_LIBRARY_VERSION_MISMATCH;
bindtextdomain (PACKAGE, LOCALEDIR);
/* Initialize libgcrypt if it hasn't already been initialized. */
if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P) == 0)
{
const char *p;
p = gcry_check_version (GNUTLS_MIN_LIBGCRYPT_VERSION);
if (p == NULL)
{
gnutls_assert ();
_gnutls_debug_log ("Checking for libgcrypt failed: %s < %s\n",
gcry_check_version (NULL),
GNUTLS_MIN_LIBGCRYPT_VERSION);
return GNUTLS_E_INCOMPATIBLE_GCRYPT_LIBRARY;
}
/* for gcrypt in order to be able to allocate memory */
gcry_control (GCRYCTL_DISABLE_SECMEM, NULL, 0);
gcry_control (GCRYCTL_INITIALIZATION_FINISHED, NULL, 0);
}
/* initialize ASN.1 parser
* This should not deal with files in the final
* version.
*/
if (asn1_check_version (GNUTLS_MIN_LIBTASN1_VERSION) == NULL)
{
gnutls_assert ();
_gnutls_debug_log ("Checking for libtasn1 failed: %s < %s\n",
asn1_check_version (NULL),
GNUTLS_MIN_LIBTASN1_VERSION);
return GNUTLS_E_INCOMPATIBLE_LIBTASN1_LIBRARY;
}
res = asn1_array2tree (pkix_asn1_tab, &_gnutls_pkix1_asn, NULL);
if (res != ASN1_SUCCESS)
{
result = _gnutls_asn2err (res);
goto out;
}
res = asn1_array2tree (gnutls_asn1_tab, &_gnutls_gnutls_asn, NULL);
if (res != ASN1_SUCCESS)
{
asn1_delete_structure (&_gnutls_pkix1_asn);
result = _gnutls_asn2err (res);
goto out;
}
/* Initialize the random generator */
result = _gnutls_rnd_init ();
if (result < 0)
{
gnutls_assert ();
goto out;
}
/* Initialize the default TLS extensions */
result = _gnutls_ext_init ();
if (result < 0)
{
gnutls_assert ();
goto out;
}
_gnutls_cryptodev_init ();
out:
return result;
}
/**
* gnutls_global_init:
*
* This function performs any required precalculations, detects
* the supported CPU capabilities and initializes the underlying
* cryptographic backend. In order to free any resources
* taken by this call you should gnutls_global_deinit()
* when gnutls usage is no longer needed.
*
* This function increments a global counter, so that
* gnutls_global_deinit() only releases resources when it has been
* called as many times as gnutls_global_init(). This is useful when
* GnuTLS is used by more than one library in an application. This
* function can be called many times, but will only do something the
* first time.
*
* Since GnuTLS 3.3.0 this function is only required in systems that
* do not support library constructors and static linking. This
* function also became thread safe.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned,
* otherwise a negative error code is returned.
**/
int gnutls_global_init(void)
{
int ret = 0, res;
int level;
const char* e;
GNUTLS_STATIC_MUTEX_LOCK(global_init_mutex);
_gnutls_init++;
if (_gnutls_init > 1) {
ret = 0;
goto out;
}
_gnutls_switch_lib_state(LIB_STATE_INIT);
e = getenv("GNUTLS_DEBUG_LEVEL");
if (e != NULL) {
level = atoi(e);
gnutls_global_set_log_level(level);
if (_gnutls_log_func == NULL)
gnutls_global_set_log_function(default_log_func);
_gnutls_debug_log("Enabled GnuTLS logging...\n");
}
bindtextdomain(PACKAGE, LOCALEDIR);
res = gnutls_crypto_init();
if (res != 0) {
gnutls_assert();
ret = GNUTLS_E_CRYPTO_INIT_FAILED;
goto out;
}
/* initialize ASN.1 parser
*/
if (asn1_check_version(GNUTLS_MIN_LIBTASN1_VERSION) == NULL) {
gnutls_assert();
_gnutls_debug_log
("Checking for libtasn1 failed: %s < %s\n",
asn1_check_version(NULL),
GNUTLS_MIN_LIBTASN1_VERSION);
ret = GNUTLS_E_INCOMPATIBLE_LIBTASN1_LIBRARY;
goto out;
}
res = asn1_array2tree(pkix_asn1_tab, &_gnutls_pkix1_asn, NULL);
if (res != ASN1_SUCCESS) {
ret = _gnutls_asn2err(res);
goto out;
}
res = asn1_array2tree(gnutls_asn1_tab, &_gnutls_gnutls_asn, NULL);
if (res != ASN1_SUCCESS) {
ret = _gnutls_asn2err(res);
goto out;
}
/* Initialize the random generator */
ret = _gnutls_rnd_init();
if (ret < 0) {
gnutls_assert();
goto out;
}
/* Initialize the default TLS extensions */
ret = _gnutls_ext_init();
if (ret < 0) {
gnutls_assert();
goto out;
}
ret = gnutls_mutex_init(&_gnutls_file_mutex);
if (ret < 0) {
gnutls_assert();
goto out;
}
ret = gnutls_mutex_init(&_gnutls_pkcs11_mutex);
if (ret < 0) {
gnutls_assert();
goto out;
}
ret = gnutls_system_global_init();
if (ret < 0) {
gnutls_assert();
goto out;
}
_gnutls_register_accel_crypto();
_gnutls_cryptodev_init();
#ifdef ENABLE_FIPS140
/* Perform FIPS140 checks last, so that all modules
* have been loaded */
res = _gnutls_fips_mode_enabled();
/* res == 1 -> fips140-2 mode enabled
* res == 2 -> only self checks performed - but no failure
* res == not in fips140 mode
*/
if (res != 0) {
_gnutls_priority_update_fips();
ret = _gnutls_fips_perform_self_checks();
if (res != 2) {
if (ret < 0) {
gnutls_assert();
goto out;
}
}
}
#endif
_gnutls_switch_lib_state(LIB_STATE_OPERATIONAL);
ret = 0;
out:
GNUTLS_STATIC_MUTEX_UNLOCK(global_init_mutex);
return ret;
}
/**
* gnutls_global_init:
*
* This function performs any required precalculations, detects
* the supported CPU capabilities and initializes the underlying
* cryptographic backend. In order to free any resources
* taken by this call you should gnutls_global_deinit()
* when gnutls usage is no longer needed.
*
* This function increments a global counter, so that
* gnutls_global_deinit() only releases resources when it has been
* called as many times as gnutls_global_init(). This is useful when
* GnuTLS is used by more than one library in an application. This
* function can be called many times, but will only do something the
* first time.
*
* Note! This function is not thread safe. If two threads call this
* function simultaneously, they can cause a race between checking
* the global counter and incrementing it, causing both threads to
* execute the library initialization code. That would lead to a
* memory leak. To handle this, your application could invoke this
* function after aquiring a thread mutex. To ignore the potential
* memory leak is also an option.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned,
* otherwise a negative error code is returned.
**/
int
gnutls_global_init (void)
{
int result = 0;
int res;
if (_gnutls_init++)
goto out;
if (gl_sockets_startup (SOCKETS_1_1))
return gnutls_assert_val(GNUTLS_E_FILE_ERROR);
bindtextdomain (PACKAGE, LOCALEDIR);
res = gnutls_crypto_init ();
if (res != 0)
{
gnutls_assert ();
return GNUTLS_E_CRYPTO_INIT_FAILED;
}
_gnutls_register_accel_crypto();
/* initialize ASN.1 parser
* This should not deal with files in the final
* version.
*/
if (asn1_check_version (GNUTLS_MIN_LIBTASN1_VERSION) == NULL)
{
gnutls_assert ();
_gnutls_debug_log ("Checking for libtasn1 failed: %s < %s\n",
asn1_check_version (NULL),
GNUTLS_MIN_LIBTASN1_VERSION);
return GNUTLS_E_INCOMPATIBLE_LIBTASN1_LIBRARY;
}
res = asn1_array2tree (pkix_asn1_tab, &_gnutls_pkix1_asn, NULL);
if (res != ASN1_SUCCESS)
{
result = _gnutls_asn2err (res);
goto out;
}
res = asn1_array2tree (gnutls_asn1_tab, &_gnutls_gnutls_asn, NULL);
if (res != ASN1_SUCCESS)
{
result = _gnutls_asn2err (res);
goto out;
}
/* Initialize the random generator */
result = _gnutls_rnd_init ();
if (result < 0)
{
gnutls_assert ();
goto out;
}
/* Initialize the default TLS extensions */
result = _gnutls_ext_init ();
if (result < 0)
{
gnutls_assert ();
goto out;
}
result = gnutls_mutex_init(&_gnutls_file_mutex);
if (result < 0)
{
gnutls_assert();
goto out;
}
result = gnutls_system_global_init ();
if (result < 0)
{
gnutls_assert ();
goto out;
}
#ifdef ENABLE_PKCS11
gnutls_pkcs11_init (GNUTLS_PKCS11_FLAG_AUTO, NULL);
#endif
_gnutls_cryptodev_init ();
out:
return result;
}
