char const *comment;
} libssl_defect_t;
-/* Record critical defects in libssl here (newest first)*/
+/* Record critical defects in libssl here, new versions of OpenSSL to older versions of OpenSSL. */
static libssl_defect_t libssl_defects[] =
{
{
+ .low = 0x01010101f, /* 1.1.0a */
+ .high = 0x01010101f, /* 1.1.0a */
+ .id = "CVE-2016-6309",
+ .name = "OCSP status request extension",
+ .comment = "For more information see https://www.openssl.org/news/secadv/20160926.txt"
+ },
+ {
+ .low = 0x01010100f, /* 1.1.0 */
+ .high = 0x01010100f, /* 1.1.0 */
+ .id = "CVE-2016-6304",
+ .name = "OCSP status request extension",
+ .comment = "For more information see https://www.openssl.org/news/secadv/20160922.txt"
+ },
+ {
+ .low = 0x01000209f, /* 1.0.2i */
+ .high = 0x01000209f, /* 1.0.2i */
+ .id = "CVE-2016-7052",
+ .name = "OCSP status request extension",
+ .comment = "For more information see https://www.openssl.org/news/secadv/20160926.txt"
+ },
+ {
+ .low = 0x01000200f, /* 1.0.2 */
+ .high = 0x01000208f, /* 1.0.2h */
+ .id = "CVE-2016-6304",
+ .name = "OCSP status request extension",
+ .comment = "For more information see https://www.openssl.org/news/secadv/20160922.txt"
+ },
+ {
+ .low = 0x01000100f, /* 1.0.1 */
+ .high = 0x01000114f, /* 1.0.1t */
+ .id = "CVE-2016-6304",
+ .name = "OCSP status request extension",
+ .comment = "For more information see https://www.openssl.org/news/secadv/20160922.txt"
+ },
+ {
.low = 0x010001000, /* 1.0.1 */
.high = 0x01000106f, /* 1.0.1f */
.id = "CVE-2014-0160",
.name = "Heartbleed",
.comment = "For more information see http://heartbleed.com"
- }
+ },
};
#endif /* ENABLE_OPENSSL_VERSION_CHECK */
static unsigned int record_minus(record_t *buf, void *ptr,
unsigned int size);
+DIAG_OFF(format-nonliteral)
+/** Print errors in the TLS thread local error stack
+ *
+ * Drains the thread local OpenSSL error queue, and prints out errors.
+ *
+ * @param[in] request The current request (may be NULL).
+ * @param[in] msg Error message describing the operation being attempted.
+ * @param[in] ap Arguments for msg.
+ * @return the number of errors drained from the stack.
+ */
+static int tls_verror_log(REQUEST *request, char const *msg, va_list ap)
+{
+ unsigned long error;
+ char *p;
+ int in_stack = 0;
+ char buffer[256];
+
+ int line;
+ char const *file;
+
+ /*
+ * Pop the first error, so ERR_peek_error()
+ * can be used to determine if there are
+ * multiple errors.
+ */
+ error = ERR_get_error_line(&file, &line);
+
+ if (msg) {
+ p = talloc_vasprintf(request, msg, ap);
+
+ /*
+ * Single line mode (there's only one error)
+ */
+ if (error && !ERR_peek_error()) {
+ ERR_error_string_n(error, buffer, sizeof(buffer));
+
+ /* Extra verbose */
+ if ((request && RDEBUG_ENABLED3) || DEBUG_ENABLED3) {
+ ROPTIONAL(REDEBUG, ERROR, "%s: %s[%i]:%s", p, file, line, buffer);
+ } else {
+ ROPTIONAL(REDEBUG, ERROR, "%s: %s", p, buffer);
+ }
+
+ talloc_free(p);
+
+ return 1;
+ }
+
+ /*
+ * Print the error we were given, irrespective
+ * of whether there were any OpenSSL errors.
+ */
+ ROPTIONAL(RERROR, ERROR, "%s", p);
+ talloc_free(p);
+ }
+
+ /*
+ * Stack mode (there are multiple errors)
+ */
+ if (!error) return 0;
+ do {
+ ERR_error_string_n(error, buffer, sizeof(buffer));
+ /* Extra verbose */
+ if ((request && RDEBUG_ENABLED3) || DEBUG_ENABLED3) {
+ ROPTIONAL(REDEBUG, ERROR, "%s[%i]:%s", file, line, buffer);
+ } else {
+ ROPTIONAL(REDEBUG, ERROR, "%s", buffer);
+ }
+ in_stack++;
+ } while ((error = ERR_get_error_line(&file, &line)));
+
+ return in_stack;
+}
+DIAG_ON(format-nonliteral)
+
+/** Print errors in the TLS thread local error stack
+ *
+ * Drains the thread local OpenSSL error queue, and prints out errors.
+ *
+ * @param[in] request The current request (may be NULL).
+ * @param[in] msg Error message describing the operation being attempted.
+ * @param[in] ... Arguments for msg.
+ * @return the number of errors drained from the stack.
+ */
+int tls_error_log(REQUEST *request, char const *msg, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, msg);
+ ret = tls_verror_log(request, msg, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+/** Print errors raised by OpenSSL I/O functions
+ *
+ * Drains the thread local OpenSSL error queue, and prints out errors
+ * based on the SSL handle and the return code of the I/O function.
+ *
+ * OpenSSL lists I/O functions to be:
+ * - SSL_connect
+ * - SSL_accept
+ * - SSL_do_handshake
+ * - SSL_read
+ * - SSL_peek
+ * - SSL_write
+ *
+ * @param request The current request (may be NULL).
+ * @param session The current tls_session.
+ * @param ret from the I/O operation.
+ * @param msg Error message describing the operation being attempted.
+ * @param ... Arguments for msg.
+ * @return
+ * - 0 TLS session cannot continue.
+ * - 1 TLS session may still be viable.
+ */
+int tls_error_io_log(REQUEST *request, tls_session_t *session, int ret, char const *msg, ...)
+{
+ int error;
+ va_list ap;
+
+ if (ERR_peek_error()) {
+ va_start(ap, msg);
+ tls_verror_log(request, msg, ap);
+ va_end(ap);
+ }
+
+ error = SSL_get_error(session->ssl, ret);
+ switch (error) {
+ /*
+ * These seem to be harmless and already "dealt
+ * with" by our non-blocking environment. NB:
+ * "ZERO_RETURN" is the clean "error"
+ * indicating a successfully closed SSL
+ * tunnel. We let this happen because our IO
+ * loop should not appear to have broken on
+ * this condition - and outside the IO loop, the
+ * "shutdown" state is checked.
+ *
+ * Don't print anything if we ignore the error.
+ */
+ case SSL_ERROR_NONE:
+ case SSL_ERROR_WANT_READ:
+ case SSL_ERROR_WANT_WRITE:
+ case SSL_ERROR_WANT_X509_LOOKUP:
+ case SSL_ERROR_ZERO_RETURN:
+ break;
+
+ /*
+ * These seem to be indications of a genuine
+ * error that should result in the SSL tunnel
+ * being regarded as "dead".
+ */
+ case SSL_ERROR_SYSCALL:
+ ROPTIONAL(REDEBUG, ERROR, "System call (I/O) error (%i)", ret);
+ return 0;
+
+ case SSL_ERROR_SSL:
+ ROPTIONAL(REDEBUG, ERROR, "TLS protocol error (%i)", ret);
+ return 0;
+
+ /*
+ * For any other errors that (a) exist, and (b)
+ * crop up - we need to interpret what to do with
+ * them - so "politely inform" the caller that
+ * the code needs updating here.
+ */
+ default:
+ ROPTIONAL(REDEBUG, ERROR, "TLS session error %i (%i)", error, ret);
+ return 0;
+ }
+
+ return 1;
+}
+
#ifdef PSK_MAX_IDENTITY_LEN
static bool identity_is_safe(const char *identity)
{
return true;
}
-
/*
* When a client uses TLS-PSK to talk to a server, this callback
* is used by the server to determine the PSK to use.
#endif
+#define MAX_SESSION_SIZE (256)
+
+
+void tls_session_id(SSL_SESSION *ssn, char *buffer, size_t bufsize)
+{
+#if OPENSSL_VERSION_NUMBER < 0x10001000L
+ size_t size;
+
+ size = ssn->session_id_length;
+ if (size > bufsize) size = bufsize;
+
+ fr_bin2hex(buffer, ssn->session_id, size);
+#else
+ unsigned int size;
+ uint8_t const *p;
+
+ p = SSL_SESSION_get_id(ssn, &size);
+ if (size > bufsize) size = bufsize;
+
+ fr_bin2hex(buffer, p, size);
+
+#endif
+}
+
+
+
static int _tls_session_free(tls_session_t *ssn)
{
/*
tls_session_t *tls_new_client_session(TALLOC_CTX *ctx, fr_tls_server_conf_t *conf, int fd)
{
+ int ret;
int verify_mode;
tls_session_t *ssn = NULL;
REQUEST *request;
talloc_set_destructor(ssn, _tls_session_free);
ssn->ctx = conf->ctx;
+ ssn->mtu = conf->fragment_size;
SSL_CTX_set_mode(ssn->ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_AUTO_RETRY);
SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_SSN, (void *)ssn);
SSL_set_fd(ssn->ssl, fd);
- if (SSL_connect(ssn->ssl) <= 0) {
- int err;
- while ((err = ERR_get_error())) {
- ERROR("tls: %s", ERR_error_string(err, NULL));
+ ret = SSL_connect(ssn->ssl);
+
+ if (ret < 0) {
+ switch (SSL_get_error(ssn->ssl, ret)) {
+ default:
+ break;
+
+
+
+ case SSL_ERROR_WANT_READ:
+ case SSL_ERROR_WANT_WRITE:
+ ssn->connected = false;
+ return ssn;
}
+ }
+
+ if (ret <= 0) {
+ tls_error_io_log(NULL, ssn, ret, "Failed in " STRINGIFY(__FUNCTION__) " (SSL_connect)");
talloc_free(ssn);
return NULL;
}
- ssn->mtu = conf->fragment_size;
-
+ ssn->connected = true;
return ssn;
}
conf->session_last_flushed = request->timestamp;
}
- if ((new_tls = SSL_new(conf->ctx)) == NULL) {
- RERROR("Error creating new SSL session: %s", ERR_error_string(ERR_get_error(), NULL));
+ new_tls = SSL_new(conf->ctx);
+ if (new_tls == NULL) {
+ tls_error_log(request, "Error creating new TLS session");
return NULL;
}
}
/*
- * Print out some text describing the error.
- */
-static int int_ssl_check(REQUEST *request, SSL *s, int ret, char const *text)
-{
- int e;
- unsigned long l;
-
- if ((l = ERR_get_error()) != 0) {
- char const *p = ERR_error_string(l, NULL);
-
- if (p) ROPTIONAL(REDEBUG, ERROR, "SSL says: %s", p);
- }
-
- e = SSL_get_error(s, ret);
- switch (e) {
- /*
- * These seem to be harmless and already "dealt
- * with" by our non-blocking environment. NB:
- * "ZERO_RETURN" is the clean "error"
- * indicating a successfully closed SSL
- * tunnel. We let this happen because our IO
- * loop should not appear to have broken on
- * this condition - and outside the IO loop, the
- * "shutdown" state is checked.
- *
- * Don't print anything if we ignore the error.
- */
- case SSL_ERROR_NONE:
- case SSL_ERROR_WANT_READ:
- case SSL_ERROR_WANT_WRITE:
- case SSL_ERROR_WANT_X509_LOOKUP:
- case SSL_ERROR_ZERO_RETURN:
- break;
-
- /*
- * These seem to be indications of a genuine
- * error that should result in the SSL tunnel
- * being regarded as "dead".
- */
- case SSL_ERROR_SYSCALL:
- ROPTIONAL(REDEBUG, ERROR, "%s failed in a system call (%d), TLS session failed", text, ret);
- return 0;
-
- case SSL_ERROR_SSL:
- ROPTIONAL(REDEBUG, ERROR, "%s failed inside of TLS (%d), TLS session failed", text, ret);
- return 0;
-
- /*
- * For any other errors that (a) exist, and (b)
- * crop up - we need to interpret what to do with
- * them - so "politely inform" the caller that
- * the code needs updating here.
- */
- default:
- ROPTIONAL(REDEBUG, ERROR, "FATAL SSL error: %d", e);
- return 0;
- }
-
- return 1;
-}
-
-/*
* We are the server, we always get the dirty data
* (Handshake data is also considered as dirty data)
* During handshake, since SSL API handles itself,
return 1;
}
- if (!int_ssl_check(request, ssn->ssl, err, "SSL_read")) return 0;
+ if (!tls_error_io_log(request, ssn, err, "Failed in " STRINGIFY(__FUNCTION__) " (SSL_read)")) return 0;
/* Some Extra STATE information for easy debugging */
if (SSL_is_init_finished(ssn->ssl)) RDEBUG2("SSL Connection Established");
if (SSL_in_accept_init(ssn->ssl)) RDEBUG2("In SSL Accept mode");
if (SSL_in_connect_init(ssn->ssl)) RDEBUG2("In SSL Connect mode");
+#if OPENSSL_VERSION_NUMBER >= 0x10001000L
+ /*
+ * Cache the SSL_SESSION pointer.
+ */
+ if (!ssn->ssl_session && SSL_is_init_finished(ssn->ssl)) {
+ ssn->ssl_session = SSL_get_session(ssn->ssl);
+ if (!ssn->ssl_session) {
+ RDEBUG("Failed getting SSL session");
+ return 0;
+ }
+ }
+#endif
+
err = BIO_ctrl_pending(ssn->from_ssl);
if (err > 0) {
err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
return 1;
} else {
- int_ssl_check(request, ssn->ssl, err, "BIO_read");
+ tls_error_log(NULL, NULL);
record_init(&ssn->dirty_in);
return 0;
}
if (err > 0) {
ssn->dirty_out.used = err;
} else {
- int_ssl_check(request, ssn->ssl, err, "handshake_send");
+ if (!tls_error_io_log(request, ssn, err,
+ "Failed in " STRINGIFY(__FUNCTION__) " (SSL_write)")) {
+ return 0;
+ }
}
}
static void session_close(tls_session_t *ssn)
{
- SSL_set_quiet_shutdown(ssn->ssl, 1);
- SSL_shutdown(ssn->ssl);
-
if (ssn->ssl) {
+ SSL_set_quiet_shutdown(ssn->ssl, 1);
+ SSL_shutdown(ssn->ssl);
+
SSL_free(ssn->ssl);
ssn->ssl = NULL;
}
/*
* This is pretty bad...
*/
- if(rec->used > 0)
- memmove(rec->data, rec->data + taken, rec->used);
+ if (rec->used > 0) memmove(rec->data, rec->data + taken, rec->used);
+
return taken;
}
* Don't print this out in the normal course of
* operations.
*/
- if (rad_debug_lvl == 0) {
- return;
- }
+ if (rad_debug_lvl == 0) return;
- str_write_p = tls_session->info.origin ? ">>>" : "<<<";
+ str_write_p = tls_session->info.origin ? ">>> send" : "<<< recv";
switch (tls_session->info.version) {
case SSL2_VERSION:
str_details1, str_details2);
request = SSL_get_ex_data(tls_session->ssl, FR_TLS_EX_INDEX_REQUEST);
- if (request) {
- RDEBUG2("%s", tls_session->info.info_description);
- } else {
- DEBUG2("%s", tls_session->info.info_description);
- }
+ ROPTIONAL(RDEBUG2, DEBUG2, "%s", tls_session->info.info_description);
}
static CONF_PARSER cache_config[] = {
};
static CONF_PARSER verify_config[] = {
+ { "skip_if_ocsp_ok", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, verify_skip_if_ocsp_ok), "no" },
{ "tmpdir", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_tmp_dir), NULL },
{ "client", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_client_cert_cmd), NULL },
CONF_PARSER_TERMINATOR
#endif
static CONF_PARSER tls_server_config[] = {
- { "rsa_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, rsa_key), "no" },
- { "dh_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, dh_key), "yes" },
- { "rsa_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, rsa_key_length), "512" },
- { "dh_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, dh_key_length), "512" },
{ "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
{ "CA_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, fr_tls_server_conf_t, ca_path), NULL },
{ "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
{ "psk_hexphrase", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, psk_password), NULL },
{ "psk_query", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, psk_query), NULL },
#endif
- { "dh_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, dh_file), NULL },
- { "random_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, random_file), NULL },
+ { "dh_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, dh_file), NULL },
+ { "random_file", FR_CONF_OFFSET(PW_TYPE_FILE_EXISTS, fr_tls_server_conf_t, random_file), NULL },
{ "fragment_size", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, fragment_size), "1024" },
{ "include_length", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, include_length), "yes" },
+ { "auto_chain", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, auto_chain), "yes" },
+ { "disable_single_dh_use", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_single_dh_use), NULL },
{ "check_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_crl), "no" },
#ifdef X509_V_FLAG_CRL_CHECK_ALL
{ "check_all_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_all_crl), "no" },
{ "allow_expired_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, allow_expired_crl), NULL },
{ "check_cert_cn", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_cn), NULL },
{ "cipher_list", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, cipher_list), NULL },
+ { "cipher_server_preference", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, cipher_server_preference), NULL },
{ "check_cert_issuer", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_issuer), NULL },
{ "require_client_cert", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, require_client_cert), NULL },
static CONF_PARSER tls_client_config[] = {
- { "rsa_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, rsa_key), "no" },
- { "dh_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, dh_key), "yes" },
- { "rsa_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, rsa_key_length), "512" },
- { "dh_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, dh_key_length), "512" },
{ "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
{ "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
{ "pem_file_type", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, file_type), "yes" },
/*
* Print debugging messages, and free data.
*/
-#define MAX_SESSION_SIZE (256)
-
static void cbtls_remove_session(SSL_CTX *ctx, SSL_SESSION *sess)
{
- size_t size;
char buffer[2 * MAX_SESSION_SIZE + 1];
fr_tls_server_conf_t *conf;
- size = sess->session_id_length;
- if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
-
- fr_bin2hex(buffer, sess->session_id, size);
+ tls_session_id(sess, buffer, MAX_SESSION_SIZE);
conf = (fr_tls_server_conf_t *)SSL_CTX_get_app_data(ctx);
if (!conf) {
static int cbtls_new_session(SSL *ssl, SSL_SESSION *sess)
{
- size_t size;
char buffer[2 * MAX_SESSION_SIZE + 1];
fr_tls_server_conf_t *conf;
unsigned char *sess_blob = NULL;
return 0;
}
- size = sess->session_id_length;
- if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
-
- fr_bin2hex(buffer, sess->session_id, size);
+ tls_session_id(sess, buffer, MAX_SESSION_SIZE);
{
int fd, rv, todo, blob_len;
blob_len = i2d_SSL_SESSION(sess, NULL);
if (blob_len < 1) {
/* something went wrong */
- RWDEBUG("Session serialisation failed, couldn't determine required buffer length");
+ if (request) RWDEBUG("Session serialisation failed, couldn't determine required buffer length");
return 0;
}
-
/* Do not convert to TALLOC - Thread safety */
/* alloc and convert to ASN.1 */
sess_blob = malloc(blob_len);
p = sess_blob;
rv = i2d_SSL_SESSION(sess, &p);
if (rv != blob_len) {
- RWDEBUG("Session serialisation failed");
+ if (request) RWDEBUG("Session serialisation failed");
goto error;
}
/* open output file */
snprintf(filename, sizeof(filename), "%s%c%s.asn1",
conf->session_cache_path, FR_DIR_SEP, buffer);
- fd = open(filename, O_RDWR|O_CREAT|O_EXCL, 0600);
+ fd = open(filename, O_RDWR|O_CREAT|O_EXCL, S_IWUSR);
if (fd < 0) {
- RERROR("Session serialisation failed, failed opening session file %s: %s",
- filename, fr_syserror(errno));
+ if (request) RERROR("Session serialisation failed, failed opening session file %s: %s",
+ filename, fr_syserror(errno));
goto error;
}
+ /*
+ * Set the filename to be temporarily write-only.
+ */
+ if (request) {
+ VALUE_PAIR *vp;
+
+ vp = fr_pair_afrom_num(request->state_ctx, PW_TLS_CACHE_FILENAME, 0);
+ if (vp) {
+ fr_pair_value_strcpy(vp, filename);
+ fr_pair_add(&request->state, vp);
+ }
+ }
+
todo = blob_len;
p = sess_blob;
while (todo > 0) {
rv = write(fd, p, todo);
if (rv < 1) {
- RWDEBUG("Failed writing session: %s", fr_syserror(errno));
+ if (request) RWDEBUG("Failed writing session: %s", fr_syserror(errno));
close(fd);
goto error;
}
todo -= rv;
}
close(fd);
- RWDEBUG("Wrote session %s to %s (%d bytes)", buffer, filename, blob_len);
+ if (request) RWDEBUG("Wrote session %s to %s (%d bytes)", buffer, filename, blob_len);
}
error:
return 0;
}
+/** Convert OpenSSL's ASN1_TIME to an epoch time
+ *
+ * @param[out] out Where to write the time_t.
+ * @param[in] asn1 The ASN1_TIME to convert.
+ * @return
+ * - 0 success.
+ * - -1 on failure.
+ */
+static int ocsp_asn1time_to_epoch(time_t *out, char const *asn1)
+{
+ struct tm t;
+ char const *p = asn1, *end = p + strlen(p);
+
+ memset(&t, 0, sizeof(t));
+
+ if ((end - p) <= 12) {
+ if ((end - p) < 2) {
+ fr_strerror_printf("ASN1 date string too short, expected 2 additional bytes, got %zu bytes",
+ end - p);
+ return -1;
+ }
+
+ t.tm_year = (*(p++) - '0') * 10;
+ t.tm_year += (*(p++) - '0');
+ if (t.tm_year < 70) t.tm_year += 100;
+ } else {
+ t.tm_year = (*(p++) - '0') * 1000;
+ t.tm_year += (*(p++) - '0') * 100;
+ t.tm_year += (*(p++) - '0') * 10;
+ t.tm_year += (*(p++) - '0');
+ t.tm_year -= 1900;
+ }
+
+ if ((end - p) < 4) {
+ fr_strerror_printf("ASN1 string too short, expected 10 additional bytes, got %zu bytes",
+ end - p);
+ return -1;
+ }
+
+ t.tm_mon = (*(p++) - '0') * 10;
+ t.tm_mon += (*(p++) - '0') - 1; // -1 since January is 0 not 1.
+ t.tm_mday = (*(p++) - '0') * 10;
+ t.tm_mday += (*(p++) - '0');
+
+ if ((end - p) < 2) goto done;
+ t.tm_hour = (*(p++) - '0') * 10;
+ t.tm_hour += (*(p++) - '0');
+
+ if ((end - p) < 2) goto done;
+ t.tm_min = (*(p++) - '0') * 10;
+ t.tm_min += (*(p++) - '0');
+
+ if ((end - p) < 2) goto done;
+ t.tm_sec = (*(p++) - '0') * 10;
+ t.tm_sec += (*(p++) - '0');
+
+ /* Apparently OpenSSL converts all timestamps to UTC? Maybe? */
+done:
+ *out = timegm(&t);
+ return 0;
+}
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
static SSL_SESSION *cbtls_get_session(SSL *ssl, unsigned char *data, int len, int *copy)
+#else
+static SSL_SESSION *cbtls_get_session(SSL *ssl, const unsigned char *data, int len, int *copy)
+#endif
{
size_t size;
char buffer[2 * MAX_SESSION_SIZE + 1];
{
int rv, fd, todo;
char filename[256];
- unsigned char *p;
+
+ unsigned char const **o;
+ unsigned char **p;
+ uint8_t *q;
+
struct stat st;
VALUE_PAIR *vps = NULL;
-
- /* read in the cached VPs from the .vps file */
- snprintf(filename, sizeof(filename), "%s%c%s.vps",
- conf->session_cache_path, FR_DIR_SEP, buffer);
- rv = pairlist_read(talloc_ctx, filename, &pairlist, 1);
- if (rv < 0) {
- /* not safe to un-persist a session w/o VPs */
- RWDEBUG("Failed loading persisted VPs for session %s", buffer);
- goto err;
- }
+ VALUE_PAIR *vp;
/* load the actual SSL session */
snprintf(filename, sizeof(filename), "%s%c%s.asn1", conf->session_cache_path, FR_DIR_SEP, buffer);
fd = open(filename, O_RDONLY);
if (fd < 0) {
RWDEBUG("No persisted session file %s: %s", filename, fr_syserror(errno));
- goto err;
+ goto error;
}
rv = fstat(fd, &st);
if (rv < 0) {
RWDEBUG("Failed stating persisted session file %s: %s", filename, fr_syserror(errno));
close(fd);
- goto err;
+ goto error;
}
sess_data = talloc_array(NULL, unsigned char, st.st_size);
if (!sess_data) {
RWDEBUG("Failed allocating buffer for persisted session (%d bytes)", (int) st.st_size);
close(fd);
- goto err;
+ goto error;
}
- p = sess_data;
+ q = sess_data;
todo = st.st_size;
while (todo > 0) {
- rv = read(fd, p, todo);
+ rv = read(fd, q, todo);
if (rv < 1) {
RWDEBUG("Failed reading persisted session: %s", fr_syserror(errno));
close(fd);
- goto err;
+ goto error;
}
todo -= rv;
- p += rv;
+ q += rv;
}
close(fd);
- /* openssl mutates &p */
- p = sess_data;
- sess = d2i_SSL_SESSION(NULL, (unsigned char const **)(void **) &p, st.st_size);
-
+ /*
+ * OpenSSL mutates what's passed in, so we assign sess_data to q,
+ * so the value of q gets mutated, and not the value of sess_data.
+ *
+ * We then need a pointer to hold &q, but it can't be const, because
+ * clang complains about lack of consting in nested pointer types.
+ *
+ * So we memcpy the value of that pointer, to one that
+ * does have a const, which we then pass into d2i_SSL_SESSION *sigh*.
+ */
+ q = sess_data;
+ p = &q;
+ memcpy(&o, &p, sizeof(o));
+ sess = d2i_SSL_SESSION(NULL, o, st.st_size);
if (!sess) {
RWDEBUG("Failed loading persisted session: %s", ERR_error_string(ERR_get_error(), NULL));
- goto err;
+ goto error;
+ }
+
+ /* read in the cached VPs from the .vps file */
+ snprintf(filename, sizeof(filename), "%s%c%s.vps",
+ conf->session_cache_path, FR_DIR_SEP, buffer);
+ rv = pairlist_read(talloc_ctx, filename, &pairlist, 1);
+ if (rv < 0) {
+ /* not safe to un-persist a session w/o VPs */
+ RWDEBUG("Failed loading persisted VPs for session %s", buffer);
+ SSL_SESSION_free(sess);
+ sess = NULL;
+ goto error;
+ }
+
+ /*
+ * Enforce client certificate expiration.
+ */
+ vp = fr_pair_find_by_num(pairlist->reply, PW_TLS_CLIENT_CERT_EXPIRATION, 0, TAG_ANY);
+ if (vp) {
+ time_t expires;
+
+ if (ocsp_asn1time_to_epoch(&expires, vp->vp_strvalue) < 0) {
+ RDEBUG2("Failed getting certificate expiration, removing cache entry for session %s - %s", buffer, fr_strerror());
+ SSL_SESSION_free(sess);
+ sess = NULL;
+ goto error;
+ }
+
+ if (expires <= request->timestamp) {
+ RDEBUG2("Certificate has expired, removing cache entry for session %s", buffer);
+ SSL_SESSION_free(sess);
+ sess = NULL;
+ goto error;
+ }
+
+ /*
+ * Account for Session-Timeout, if it's available.
+ */
+ vp = fr_pair_find_by_num(request->reply->vps, PW_SESSION_TIMEOUT, 0, TAG_ANY);
+ if (vp) {
+ if ((request->timestamp + vp->vp_integer) > expires) {
+ vp->vp_integer = expires - request->timestamp;
+ RWDEBUG2("Updating Session-Timeout to %u, due to impending certificate expiration",
+ vp->vp_integer);
+ }
+ }
}
/* move the cached VPs into the session */
RWDEBUG("Successfully restored session %s", buffer);
rdebug_pair_list(L_DBG_LVL_2, request, vps, "reply:");
}
-err:
+error:
if (sess_data) talloc_free(sess_data);
if (pairlist) pairlist_free(&pairlist);
}
#ifdef HAVE_OPENSSL_OCSP_H
-/*
- * This function extracts the OCSP Responder URL
- * from an existing x509 certificate.
+
+/** Extract components of OCSP responser URL from a certificate
+ *
+ * @param[in] cert to extract URL from.
+ * @param[out] host_out Portion of the URL (must be freed with free()).
+ * @param[out] port_out Port portion of the URL (must be freed with free()).
+ * @param[out] path_out Path portion of the URL (must be freed with free()).
+ * @param[out] is_https Whether the responder should be contacted using https.
+ * @return
+ * - 0 if no valid URL is contained in the certificate.
+ * - 1 if a URL was found and parsed.
+ * - -1 if at least one URL was found, but none could be parsed.
*/
-static int ocsp_parse_cert_url(X509 *cert, char **phost, char **pport,
- char **ppath, int *pssl)
+static int ocsp_parse_cert_url(X509 *cert, char **host_out, char **port_out,
+ char **path_out, int *is_https)
{
int i;
+ bool found_uri = false;
AUTHORITY_INFO_ACCESS *aia;
ACCESS_DESCRIPTION *ad;
for (i = 0; i < sk_ACCESS_DESCRIPTION_num(aia); i++) {
ad = sk_ACCESS_DESCRIPTION_value(aia, i);
- if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
- if (ad->location->type == GEN_URI) {
- if(OCSP_parse_url((char *) ad->location->d.ia5->data,
- phost, pport, ppath, pssl))
- return 1;
- }
- }
+ if (OBJ_obj2nid(ad->method) != NID_ad_OCSP) continue;
+ if (ad->location->type != GEN_URI) continue;
+ found_uri = true;
+
+ if (OCSP_parse_url((char *) ad->location->d.ia5->data, host_out,
+ port_out, path_out, is_https)) return 1;
}
- return 0;
+ return found_uri ? -1 : 0;
}
/*
/* Maximum leeway in validity period: default 5 minutes */
#define MAX_VALIDITY_PERIOD (5 * 60)
-static int ocsp_check(REQUEST *request, X509_STORE *store, X509 *issuer_cert, X509 *client_cert,
- fr_tls_server_conf_t *conf)
+typedef enum {
+ OCSP_STATUS_FAILED = 0,
+ OCSP_STATUS_OK = 1,
+ OCSP_STATUS_SKIPPED = 2,
+} ocsp_status_t;
+
+static ocsp_status_t ocsp_check(REQUEST *request, X509_STORE *store, X509 *issuer_cert, X509 *client_cert,
+ fr_tls_server_conf_t *conf)
{
OCSP_CERTID *certid;
OCSP_REQUEST *req;
int use_ssl = -1;
long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
BIO *cbio, *bio_out;
- int ocsp_ok = 0;
+ ocsp_status_t ocsp_status = OCSP_STATUS_FAILED;
int status;
ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
int reason;
struct timeval now;
struct timeval when;
#endif
+ VALUE_PAIR *vp;
/*
* Create OCSP Request
if (conf->ocsp_override_url) {
char *url;
+ use_ocsp_url:
memcpy(&url, &conf->ocsp_url, sizeof(url));
/* Reading the libssl src, they do a strdup on the URL, so it could of been const *sigh* */
OCSP_parse_url(url, &host, &port, &path, &use_ssl);
+ if (!host || !port || !path) {
+ RWDEBUG("ocsp: Host or port or path missing from configured URL \"%s\". Not doing OCSP", url);
+ goto skipped;
+ }
} else {
- ocsp_parse_cert_url(client_cert, &host, &port, &path, &use_ssl);
- }
+ int ret;
+
+ ret = ocsp_parse_cert_url(client_cert, &host, &port, &path, &use_ssl);
+ switch (ret) {
+ case -1:
+ RWDEBUG("ocsp: Invalid URL in certificate. Not doing OCSP");
+ break;
+
+ case 0:
+ if (conf->ocsp_url) {
+ RWDEBUG("ocsp: No OCSP URL in certificate, falling back to configured URL");
+ goto use_ocsp_url;
+ }
+ RWDEBUG("ocsp: No OCSP URL in certificate. Not doing OCSP");
+ goto skipped;
- if (!host || !port || !path) {
- RWDEBUG("ocsp: Host / port / path missing. Not doing OCSP");
- ocsp_ok = 2;
- goto ocsp_skip;
+ case 1:
+ break;
+ }
}
RDEBUG2("ocsp: Using responder URL \"http://%s:%s%s\"", host, port, path);
/* Check host and port length are sane, then create Host: HTTP header */
if ((strlen(host) + strlen(port) + 2) > sizeof(hostheader)) {
RWDEBUG("ocsp: Host and port too long");
- goto ocsp_skip;
+ goto skipped;
}
snprintf(hostheader, sizeof(hostheader), "%s:%s", host, port);
resp = OCSP_sendreq_bio(cbio, path, req);
if (!resp) {
REDEBUG("ocsp: Couldn't get OCSP response");
- ocsp_ok = 2;
+ ocsp_status = OCSP_STATUS_SKIPPED;
goto ocsp_end;
}
#else
rc = BIO_do_connect(cbio);
if ((rc <= 0) && ((!conf->ocsp_timeout) || !BIO_should_retry(cbio))) {
REDEBUG("ocsp: Couldn't connect to OCSP responder");
- ocsp_ok = 2;
+ ocsp_status = OCSP_STATUS_SKIPPED;
goto ocsp_end;
}
ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
if (!ctx) {
REDEBUG("ocsp: Couldn't create OCSP request");
- ocsp_ok = 2;
+ ocsp_status = OCSP_STATUS_SKIPPED;
goto ocsp_end;
}
if (!OCSP_REQ_CTX_add1_header(ctx, "Host", hostheader)) {
REDEBUG("ocsp: Couldn't set Host header");
- ocsp_ok = 2;
+ ocsp_status = OCSP_STATUS_SKIPPED;
goto ocsp_end;
}
if (!OCSP_REQ_CTX_set1_req(ctx, req)) {
REDEBUG("ocsp: Couldn't add data to OCSP request");
- ocsp_ok = 2;
+ ocsp_status = OCSP_STATUS_SKIPPED;
goto ocsp_end;
}
if (conf->ocsp_timeout && (rc == -1) && BIO_should_retry(cbio)) {
REDEBUG("ocsp: Response timed out");
- ocsp_ok = 2;
+ ocsp_status = OCSP_STATUS_SKIPPED;
goto ocsp_end;
}
if (rc == 0) {
REDEBUG("ocsp: Couldn't get OCSP response");
- ocsp_ok = 2;
+ ocsp_status = OCSP_STATUS_SKIPPED;
goto ocsp_end;
}
#endif
switch (status) {
case V_OCSP_CERTSTATUS_GOOD:
RDEBUG2("ocsp: Cert status: good");
- ocsp_ok = 1;
+ vp = pair_make_request("TLS-OCSP-Cert-Valid", NULL, T_OP_SET);
+ vp->vp_integer = 1; /* yes */
+ ocsp_status = OCSP_STATUS_OK;
break;
default:
if (bio_out) BIO_free(bio_out);
OCSP_BASICRESP_free(bresp);
- ocsp_skip:
- switch (ocsp_ok) {
- case 1:
+ switch (ocsp_status) {
+ case OCSP_STATUS_OK:
RDEBUG2("ocsp: Certificate is valid");
break;
- case 2:
+ case OCSP_STATUS_SKIPPED:
+ skipped:
+ vp = pair_make_request("TLS-OCSP-Cert-Valid", NULL, T_OP_SET);
+ vp->vp_integer = 2; /* skipped */
if (conf->ocsp_softfail) {
RWDEBUG("ocsp: Unable to check certificate, assuming it's valid");
RWDEBUG("ocsp: This may be insecure");
- ocsp_ok = 1;
+
+ /* Remove OpenSSL errors from queue or handshake will fail */
+ while (ERR_get_error());
+
+ ocsp_status = OCSP_STATUS_SKIPPED;
} else {
REDEBUG("ocsp: Unable to check certificate, failing");
- ocsp_ok = 0;
+ ocsp_status = OCSP_STATUS_FAILED;
}
break;
default:
+ vp = pair_make_request("TLS-OCSP-Cert-Valid", NULL, T_OP_SET);
+ vp->vp_integer = 0; /* no */
REDEBUG("ocsp: Certificate has been expired/revoked");
break;
}
- return ocsp_ok;
+ return ocsp_status;
}
#endif /* HAVE_OPENSSL_OCSP_H */
char cn_str[1024];
char buf[64];
X509 *client_cert;
- X509_CINF *client_inf;
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
+ const STACK_OF(X509_EXTENSION) *ext_list;
+#else
STACK_OF(X509_EXTENSION) *ext_list;
+#endif
SSL *ssl;
int err, depth, lookup, loc;
fr_tls_server_conf_t *conf;
#ifdef HAVE_OPENSSL_OCSP_H
X509_STORE *ocsp_store = NULL;
X509 *issuer_cert;
+ bool do_verify = false;
#endif
VALUE_PAIR *vp;
TALLOC_CTX *talloc_ctx;
identity = (char **)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_IDENTITY);
#ifdef HAVE_OPENSSL_OCSP_H
- ocsp_store = (X509_STORE *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_STORE);
+ ocsp_store = conf->ocsp_store;
#endif
talloc_ctx = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_TALLOC);
rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
}
- X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), issuer,
+ X509_NAME_oneline(X509_get_issuer_name(client_cert), issuer,
sizeof(issuer));
issuer[sizeof(issuer) - 1] = '\0';
if (certs && identity && (lookup <= 1) && issuer[0]) {
/*
* Get the RFC822 Subject Alternative Name
*/
- loc = X509_get_ext_by_NID(client_cert, NID_subject_alt_name, 0);
+ loc = X509_get_ext_by_NID(client_cert, NID_subject_alt_name, -1);
if (certs && (lookup <= 1) && (loc >= 0)) {
X509_EXTENSION *ext = NULL;
GENERAL_NAMES *names = NULL;
#ifdef GEN_EMAIL
case GEN_EMAIL:
vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_EMAIL][lookup],
- (char *) ASN1_STRING_data(name->d.rfc822Name), T_OP_SET);
+ (char const *) ASN1_STRING_get0_data(name->d.rfc822Name), T_OP_SET);
rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
break;
#endif /* GEN_EMAIL */
#ifdef GEN_DNS
case GEN_DNS:
vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_DNS][lookup],
- (char *) ASN1_STRING_data(name->d.dNSName), T_OP_SET);
+ (char const *) ASN1_STRING_get0_data(name->d.dNSName), T_OP_SET);
rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
break;
#endif /* GEN_DNS */
/* we've got a UPN - Must be ASN1-encoded UTF8 string */
if (name->d.otherName->value->type == V_ASN1_UTF8STRING) {
vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_UPN][lookup],
- (char *) ASN1_STRING_data(name->d.otherName->value->value.utf8string), T_OP_SET);
+ (char const *) ASN1_STRING_get0_data(name->d.otherName->value->value.utf8string), T_OP_SET);
rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
break;
} else {
}
}
if (names != NULL)
- sk_GENERAL_NAME_free(names);
+ GENERAL_NAMES_free(names);
}
/*
}
if (lookup == 0) {
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
+ ext_list = X509_get0_extensions(client_cert);
+#else
+ X509_CINF *client_inf;
client_inf = client_cert->cert_info;
ext_list = client_inf->extensions;
+#endif
} else {
ext_list = NULL;
}
REXDENT();
- switch (ctx->error) {
+ switch (X509_STORE_CTX_get_error(ctx)) {
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
RERROR("issuer=%s", issuer);
break;
} /* check_cert_cn */
#ifdef HAVE_OPENSSL_OCSP_H
- if (my_ok && conf->ocsp_enable){
- RDEBUG2("Starting OCSP Request");
- if (X509_STORE_CTX_get1_issuer(&issuer_cert, ctx, client_cert) != 1) {
- RERROR("Couldn't get issuer_cert for %s", common_name);
+ if (my_ok) {
+ /*
+ * No OCSP, allow external verification.
+ */
+ if (!conf->ocsp_enable) {
+ do_verify = true;
+
} else {
- my_ok = ocsp_check(request, ocsp_store, issuer_cert, client_cert, conf);
+ RDEBUG2("Starting OCSP Request");
+ if ((X509_STORE_CTX_get1_issuer(&issuer_cert, ctx, client_cert) != 1) ||
+ !issuer_cert) {
+ /*
+ * Allow for external verify.
+ */
+ RERROR("Couldn't get issuer_cert for %s", common_name);
+ do_verify = true;
+
+ } else {
+ /*
+ * Do the full OCSP checks.
+ *
+ * If they fail, don't run the external verify. We don't want
+ * to allow admins to force authentication success for bad
+ * certificates.
+ *
+ * If the OCSP checks succeed, check whether we still want to
+ * run the external verification routine. If it's marked as
+ * "skip verify on OK", then we don't do verify.
+ */
+ my_ok = ocsp_check(request, ocsp_store, issuer_cert, client_cert, conf);
+ if (my_ok != OCSP_STATUS_FAILED) {
+ do_verify = !conf->verify_skip_if_ocsp_ok;
+ }
+ }
}
}
#endif
- while (conf->verify_client_cert_cmd) {
+ if ((my_ok != OCSP_STATUS_FAILED)
+#ifdef HAVE_OPENSSL_OCSP_H
+ && do_verify
+#endif
+ ) while (conf->verify_client_cert_cmd) {
char filename[256];
int fd;
FILE *fp;
snprintf(filename, sizeof(filename), "%s/%s.client.XXXXXXXX",
- conf->verify_tmp_dir, progname);
+ conf->verify_tmp_dir, main_config.name);
fd = mkstemp(filename);
if (fd < 0) {
RDEBUG("Failed creating file in %s: %s",
true, true, EXEC_TIMEOUT) != 0) {
AUTH(LOG_PREFIX ": Certificate CN (%s) fails external verification!", common_name);
my_ok = 0;
- } else {
+
+ } else if (request) {
RDEBUG("Client certificate CN %s passed external validation", common_name);
}
unlink(filename);
break;
}
-
-
} /* depth == 0 */
+ if (certs && request && !my_ok) {
+ fr_pair_add(&request->packet->vps, fr_pair_list_copy(request->packet, *certs));
+ }
+
if (RDEBUG_ENABLED3) {
RDEBUG3("chain-depth : %d", depth);
RDEBUG3("error : %d", err);
RDEBUG3("issuer : %s", issuer);
RDEBUG3("verify return : %d", my_ok);
}
- return my_ok;
+
+ return (my_ok != 0);
}
/* Load the CAs we trust */
if (conf->ca_file || conf->ca_path)
- if(!X509_STORE_load_locations(store, conf->ca_file, conf->ca_path)) {
- ERROR(LOG_PREFIX ": X509_STORE error %s", ERR_error_string(ERR_get_error(), NULL));
- ERROR(LOG_PREFIX ": Error reading Trusted root CA list %s",conf->ca_file );
+ if (!X509_STORE_load_locations(store, conf->ca_file, conf->ca_path)) {
+ tls_error_log(NULL, "Error reading Trusted root CA list \"%s\"", conf->ca_file);
return NULL;
}
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
-static int set_ecdh_curve(SSL_CTX *ctx, char const *ecdh_curve)
+static int set_ecdh_curve(SSL_CTX *ctx, char const *ecdh_curve, bool disable_single_dh_use)
{
int nid;
EC_KEY *ecdh;
SSL_CTX_set_tmp_ecdh(ctx, ecdh);
- SSL_CTX_set_options(ctx, SSL_OP_SINGLE_ECDH_USE);
+ if (!disable_single_dh_use) {
+ SSL_CTX_set_options(ctx, SSL_OP_SINGLE_ECDH_USE);
+ }
EC_KEY_free(ecdh);
* is using the session
*/
static void sess_free_vps(UNUSED void *parent, void *data_ptr,
- UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
- UNUSED long argl, UNUSED void *argp)
+ UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
+ UNUSED long argl, UNUSED void *argp)
{
- VALUE_PAIR *vp = data_ptr;
- if (!vp) return;
+ VALUE_PAIR *vp = data_ptr;
+ if (!vp) return;
- DEBUG2(LOG_PREFIX ": Freeing cached session VPs");
+ DEBUG2(LOG_PREFIX ": Freeing cached session VPs");
- fr_pair_list_free(&vp);
+ fr_pair_list_free(&vp);
}
static void sess_free_certs(UNUSED void *parent, void *data_ptr,
- UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
- UNUSED long argl, UNUSED void *argp)
+ UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
+ UNUSED long argl, UNUSED void *argp)
{
- VALUE_PAIR **certs = data_ptr;
- if (!certs) return;
+ VALUE_PAIR **certs = data_ptr;
+ if (!certs) return;
- DEBUG2(LOG_PREFIX ": Freeing cached session Certificates");
+ DEBUG2(LOG_PREFIX ": Freeing cached session Certificates");
- fr_pair_list_free(certs);
+ fr_pair_list_free(certs);
}
/** Add all the default ciphers and message digests reate our context.
SSL_load_error_strings(); /* readable error messages (examples show call before library_init) */
SSL_library_init(); /* initialize library */
OpenSSL_add_all_algorithms(); /* required for SHA2 in OpenSSL < 0.9.8o and 1.0.0.a */
- OPENSSL_config(NULL);
+ CONF_modules_load_file(NULL, NULL, 0);
/*
* Initialize the index for the certificates.
int tls_global_version_check(char const *acknowledged)
{
uint64_t v;
+ bool bad = false;
+ size_t i;
+
+ if (strcmp(acknowledged, "yes") == 0) return 0;
+
+ /* Check for bad versions */
+ v = (uint64_t) SSLeay();
- if ((strcmp(acknowledged, libssl_defects[0].id) != 0) && (strcmp(acknowledged, "yes") != 0)) {
- bool bad = false;
- size_t i;
+ for (i = 0; i < (sizeof(libssl_defects) / sizeof(*libssl_defects)); i++) {
+ libssl_defect_t *defect = &libssl_defects[i];
- /* Check for bad versions */
- v = (uint64_t) SSLeay();
+ if ((v >= defect->low) && (v <= defect->high)) {
+ /*
+ * If the CVE is acknowledged, allow it.
+ */
+ if (!bad && (strcmp(acknowledged, defect->id) == 0)) return 0;
- for (i = 0; i < (sizeof(libssl_defects) / sizeof(*libssl_defects)); i++) {
- libssl_defect_t *defect = &libssl_defects[i];
+ ERROR("Refusing to start with libssl version %s (in range %s)",
+ ssl_version(), ssl_version_range(defect->low, defect->high));
+ ERROR("Security advisory %s (%s)", defect->id, defect->name);
+ ERROR("%s", defect->comment);
- if ((v >= defect->low) && (v <= defect->high)) {
- ERROR("Refusing to start with libssl version %s (in range %s)",
- ssl_version(), ssl_version_range(defect->low, defect->high));
- ERROR("Security advisory %s (%s)", defect->id, defect->name);
- ERROR("%s", defect->comment);
+ /*
+ * Only warn about the first one...
+ */
+ if (!bad) {
+ INFO("Once you have verified libssl has been correctly patched, "
+ "set security.allow_vulnerable_openssl = '%s'", defect->id);
bad = true;
}
}
-
- if (bad) {
- INFO("Once you have verified libssl has been correctly patched, "
- "set security.allow_vulnerable_openssl = '%s'", libssl_defects[0].id);
- return -1;
- }
}
+ if (bad) return -1;
+
return 0;
}
#endif
*/
void tls_global_cleanup(void)
{
+#if OPENSSL_VERSION_NUMBER < 0x10000000L
ERR_remove_state(0);
+#elif OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ ERR_remove_thread_state(NULL);
+#endif
ENGINE_cleanup();
CONF_modules_unload(1);
ERR_free_strings();
ctx = SSL_CTX_new(SSLv23_method()); /* which is really "all known SSL / TLS methods". Idiots. */
if (!ctx) {
- int err;
- while ((err = ERR_get_error())) {
- ERROR(LOG_PREFIX ": Failed creating SSL context: %s", ERR_error_string(err, NULL));
- return NULL;
- }
+ tls_error_log(NULL, "Failed creating TLS context");
+ return NULL;
}
/*
if (type == SSL_FILETYPE_PEM) {
if (!(SSL_CTX_use_certificate_chain_file(ctx, conf->certificate_file))) {
- ERROR(LOG_PREFIX ": Error reading certificate file %s:%s", conf->certificate_file,
- ERR_error_string(ERR_get_error(), NULL));
+ tls_error_log(NULL, "Failed reading certificate file \"%s\"",
+ conf->certificate_file);
return NULL;
}
} else if (!(SSL_CTX_use_certificate_file(ctx, conf->certificate_file, type))) {
- ERROR(LOG_PREFIX ": Error reading certificate file %s:%s",
- conf->certificate_file,
- ERR_error_string(ERR_get_error(), NULL));
+ tls_error_log(NULL, "Failed reading certificate file \"%s\"",
+ conf->certificate_file);
return NULL;
}
load_ca:
if (conf->ca_file || conf->ca_path) {
if (!SSL_CTX_load_verify_locations(ctx, conf->ca_file, conf->ca_path)) {
- ERROR(LOG_PREFIX ": SSL error %s", ERR_error_string(ERR_get_error(), NULL));
- ERROR(LOG_PREFIX ": Error reading Trusted root CA list %s",conf->ca_file );
+ tls_error_log(NULL, "Failed reading Trusted root CA list \"%s\"",
+ conf->ca_file);
return NULL;
}
}
if (conf->private_key_file) {
if (!(SSL_CTX_use_PrivateKey_file(ctx, conf->private_key_file, type))) {
- ERROR(LOG_PREFIX ": Failed reading private key file %s:%s",
- conf->private_key_file,
- ERR_error_string(ERR_get_error(), NULL));
+ tls_error_log(NULL, "Failed reading private key file \"%s\"",
+ conf->private_key_file);
return NULL;
}
ctx_tls_versions |= SSL_OP_NO_TLSv1_1;
#endif
#ifdef SSL_OP_NO_TLSv1_2
+
if (conf->disable_tlsv1_2) ctx_options |= SSL_OP_NO_TLSv1_2;
ctx_tls_versions |= SSL_OP_NO_TLSv1_2;
+
#endif
if ((ctx_options & ctx_tls_versions) == ctx_tls_versions) {
ctx_options |= SSL_OP_NO_TICKET;
#endif
- /*
- * SSL_OP_SINGLE_DH_USE must be used in order to prevent
- * small subgroup attacks and forward secrecy. Always
- * using
- *
- * SSL_OP_SINGLE_DH_USE has an impact on the computer
- * time needed during negotiation, but it is not very
- * large.
- */
- ctx_options |= SSL_OP_SINGLE_DH_USE;
+ if (!conf->disable_single_dh_use) {
+ /*
+ * SSL_OP_SINGLE_DH_USE must be used in order to prevent
+ * small subgroup attacks and forward secrecy. Always
+ * using SSL_OP_SINGLE_DH_USE has an impact on the
+ * computer time needed during negotiation, but it is not
+ * very large.
+ */
+ ctx_options |= SSL_OP_SINGLE_DH_USE;
+ }
/*
* SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS to work around issues
*/
ctx_options |= SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
+ if (conf->cipher_server_preference) {
+ /*
+ * SSL_OP_CIPHER_SERVER_PREFERENCE to follow best practice
+ * of nowday's TLS: do not allow poorly-selected ciphers from
+ * client to take preference
+ */
+ ctx_options |= SSL_OP_CIPHER_SERVER_PREFERENCE;
+ }
+
SSL_CTX_set_options(ctx, ctx_options);
/*
*/
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
- if (set_ecdh_curve(ctx, conf->ecdh_curve) < 0) {
+ if (set_ecdh_curve(ctx, conf->ecdh_curve, conf->disable_single_dh_use) < 0) {
return NULL;
}
#endif
#endif
+ /*
+ * OpenSSL will automatically create certificate chains,
+ * unless we tell it to not do that. The problem is that
+ * it sometimes gets the chains right from a certificate
+ * signature view, but wrong from the clients view.
+ */
+ if (!conf->auto_chain) {
+ SSL_CTX_set_mode(ctx, SSL_MODE_NO_AUTO_CHAIN);
+ }
+
/* Set Info callback */
SSL_CTX_set_info_callback(ctx, cbtls_info);
if (conf->check_crl) {
certstore = SSL_CTX_get_cert_store(ctx);
if (certstore == NULL) {
- ERROR(LOG_PREFIX ": SSL error %s", ERR_error_string(ERR_get_error(), NULL));
- ERROR(LOG_PREFIX ": Error reading Certificate Store");
+ tls_error_log(NULL, "Error reading Certificate Store");
return NULL;
}
X509_STORE_set_flags(certstore, X509_V_FLAG_CRL_CHECK);
SSL_CTX_set_verify_depth(ctx, conf->verify_depth);
}
+#ifndef LIBRESSL_VERSION_NUMBER
/* Load randomness */
if (conf->random_file) {
if (!(RAND_load_file(conf->random_file, 1024*10))) {
- ERROR(LOG_PREFIX ": SSL error %s", ERR_error_string(ERR_get_error(), NULL));
- ERROR(LOG_PREFIX ": Error loading randomness");
+ tls_error_log(NULL, "Failed loading randomness");
return NULL;
}
}
+#endif
/*
* Set the cipher list if we were told to
*/
if (conf->cipher_list) {
if (!SSL_CTX_set_cipher_list(ctx, conf->cipher_list)) {
- ERROR(LOG_PREFIX ": Error setting cipher list");
+ tls_error_log(NULL, "Failed setting cipher list");
return NULL;
}
}
}
/*
- * Cache it, and DON'T auto-clear it.
+ * Cache it, DON'T auto-clear it, and disable the internal OpenSSL session cache.
*/
- SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_SERVER | SSL_SESS_CACHE_NO_AUTO_CLEAR);
+ SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_SERVER | SSL_SESS_CACHE_NO_AUTO_CLEAR | SSL_SESS_CACHE_NO_INTERNAL);
SSL_CTX_set_session_id_context(ctx,
(unsigned char *) conf->session_context_id,
return 0;
}
-static fr_tls_server_conf_t *tls_server_conf_alloc(TALLOC_CTX *ctx)
+fr_tls_server_conf_t *tls_server_conf_alloc(TALLOC_CTX *ctx)
{
fr_tls_server_conf_t *conf;
*/
if (conf->fragment_size < 100) conf->fragment_size = 100;
- if (!conf->private_key_file) {
- ERROR(LOG_PREFIX ": TLS Server requires a private key file");
- goto error;
- }
+ /*
+ * Only check for certificate things if we don't have a
+ * PSK query.
+ */
+#ifdef PSK_MAX_IDENTITY_LEN
+ if (conf->psk_identity) {
+ if (conf->private_key_file) {
+ WARN(LOG_PREFIX ": Ignoring private key file due to psk_identity being used");
+ }
- if (!conf->certificate_file) {
- ERROR(LOG_PREFIX ": TLS Server requires a certificate file");
- goto error;
+ if (conf->certificate_file) {
+ WARN(LOG_PREFIX ": Ignoring certificate file due to psk_identity being used");
+ }
+
+ } else
+#endif
+ {
+ if (!conf->private_key_file) {
+ ERROR(LOG_PREFIX ": TLS Server requires a private key file");
+ goto error;
+ }
+
+ if (!conf->certificate_file) {
+ ERROR(LOG_PREFIX ": TLS Server requires a certificate file");
+ goto error;
+ }
}
/*
goto error;
}
+#ifdef SSL_OP_NO_TLSv1_2
+ /*
+ * OpenSSL 1.0.1f and 1.0.1g get the MS-MPPE keys wrong.
+ */
+#if (OPENSSL_VERSION_NUMBER >= 0x10010060L) && (OPENSSL_VERSION_NUMBER < 0x10010060L)
+ conf->disable_tlsv1_2 = true;
+ WARN(LOG_PREFIX ": Disabling TLSv1.2 due to OpenSSL bugs");
+#endif
+#endif
+
/*
* Cache conf in cs in case we're asked to parse this again.
*/
return conf;
}
+
int tls_success(tls_session_t *ssn, REQUEST *request)
{
VALUE_PAIR *vp, *vps = NULL;
(((vp = fr_pair_find_by_num(request->config, PW_ALLOW_SESSION_RESUMPTION, 0, TAG_ANY)) != NULL) &&
(vp->vp_integer == 0))) {
SSL_CTX_remove_session(ssn->ctx,
- ssn->ssl->session);
+ ssn->ssl_session);
ssn->allow_session_resumption = false;
/*
* user data in the cache.
*/
} else if (!SSL_session_reused(ssn->ssl)) {
- size_t size;
VALUE_PAIR **certs;
char buffer[2 * MAX_SESSION_SIZE + 1];
- size = ssn->ssl->session->session_id_length;
- if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
-
- fr_bin2hex(buffer, ssn->ssl->session->session_id, size);
+ tls_session_id(ssn->ssl_session, buffer, MAX_SESSION_SIZE);
vp = fr_pair_list_copy_by_num(talloc_ctx, request->reply->vps, PW_USER_NAME, 0, TAG_ANY);
if (vp) fr_pair_add(&vps, vp);
* Save the certs in the packet, so that we can see them.
*/
fr_pair_add(&request->packet->vps, fr_pair_list_copy(request->packet, *certs));
+
+ vp = fr_pair_find_by_num(request->packet->vps, PW_TLS_CLIENT_CERT_EXPIRATION, 0, TAG_ANY);
+ if (vp) {
+ time_t expires;
+
+ if (ocsp_asn1time_to_epoch(&expires, vp->vp_strvalue) < 0) {
+ RDEBUG2("Failed getting certificate expiration, removing cache entry for session %s", buffer);
+ SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
+ return -1;
+ }
+
+ if (expires <= request->timestamp) {
+ RDEBUG2("Certificate has expired, removing cache entry for session %s", buffer);
+ SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
+ return -1;
+ }
+
+ /*
+ * Account for Session-Timeout, if it's available.
+ */
+ vp = fr_pair_find_by_num(request->reply->vps, PW_SESSION_TIMEOUT, 0, TAG_ANY);
+ if (vp) {
+ if ((request->timestamp + vp->vp_integer) > expires) {
+ vp->vp_integer = expires - request->timestamp;
+ RWDEBUG2("Updating Session-Timeout to %u, due to impending certificate expiration",
+ vp->vp_integer);
+ }
+ }
+ }
}
if (vps) {
- SSL_SESSION_set_ex_data(ssn->ssl->session, fr_tls_ex_index_vps, vps);
+ SSL_SESSION_set_ex_data(ssn->ssl_session, fr_tls_ex_index_vps, vps);
rdebug_pair_list(L_DBG_LVL_2, request, vps, " caching ");
if (conf->session_cache_path) {
}
} else {
RDEBUG2("No information to cache: session caching will be disabled for session %s", buffer);
- SSL_CTX_remove_session(ssn->ctx, ssn->ssl->session);
+ SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
}
/*
* Else the session WAS allowed. Copy the cached reply.
*/
} else {
- size_t size;
char buffer[2 * MAX_SESSION_SIZE + 1];
- size = ssn->ssl->session->session_id_length;
- if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
-
- fr_bin2hex(buffer, ssn->ssl->session->session_id, size);
+ tls_session_id(ssn->ssl_session, buffer, MAX_SESSION_SIZE);
/*
* The "restore VPs from OpenSSL cache" code is
/*
* Force the session to NOT be cached.
*/
- SSL_CTX_remove_session(ssn->ctx, ssn->ssl->session);
+ SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
}
fr_tls_status_t tls_application_data(tls_session_t *ssn, REQUEST *request)
break;
default:
- DEBUG("Error in fragmentation logic: %s", ERR_error_string(code, NULL));
-
- /*
- * FIXME: Call int_ssl_check?
- */
+ REDEBUG("Error in fragmentation logic");
+ tls_error_io_log(request, ssn, err,
+ "Failed in " STRINGIFY(__FUNCTION__) " (SSL_read)");
break;
}
return FR_TLS_FAIL;
projects / freeradius.git / blobdiff