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_SSN, (void *)ssn);
SSL_set_fd(ssn->ssl, fd);
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;
}
-
/** Create a new TLS session
*
* Configures a new TLS session, configuring options, setting callbacks etc...
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;
}
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;
}
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;
}
fr_pair_value_strcpy(vp, filename);
fr_pair_add(&request->state, vp);
}
-
- (void) fchmod(fd, S_IWUSR);
}
todo = blob_len;
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) < 10) {
+ 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');
+ t.tm_hour = (*(p++) - '0') * 10;
+ t.tm_hour += (*(p++) - '0');
+ t.tm_min = (*(p++) - '0') * 10;
+ t.tm_min += (*(p++) - '0');
+ t.tm_sec = (*(p++) - '0') * 10;
+ t.tm_sec += (*(p++) - '0');
+
+ /* Apparently OpenSSL converts all timestamps to UTC? Maybe? */
+ *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
struct stat st;
VALUE_PAIR *vps = NULL;
+ 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;
}
q = sess_data;
if (rv < 1) {
RWDEBUG("Failed reading persisted session: %s", fr_syserror(errno));
close(fd);
- goto err;
+ goto error;
}
todo -= rv;
q += rv;
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 */
if (rv < 0) {
/* not safe to un-persist a session w/o VPs */
RWDEBUG("Failed loading persisted VPs for session %s", buffer);
- goto err;
+ SSL_SESSION_free(sess);
+ 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", buffer);
+ SSL_SESSION_free(sess);
+ goto error;
+ }
+
+ if (expires <= request->timestamp) {
+ RDEBUG2("Certificate has expired, removing cache entry for session %s", buffer);
+ SSL_SESSION_free(sess);
+ 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);
/*
* 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;
}
if (lookup == 0) {
- #if OPENSSL_VERSION_NUMBER >= 0x10100000L
+ #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
ext_list = X509_get0_extensions(client_cert);
#else
X509_CINF *client_inf;
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);
}
#endif
#endif
+ /*
+ * DIE OPENSSL DIE DIE DIE
+ *
+ * What a palaver, just to free some data attached the
+ * session. We need to do this because the "remove" callback
+ * is called when refcount > 0 sometimes, if another thread
+ * 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)
+ {
+ VALUE_PAIR *vp = data_ptr;
+ if (!vp) return;
+
+ DEBUG2(LOG_PREFIX ": Freeing cached session VPs");
+
+ 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)
+ {
+ VALUE_PAIR **certs = data_ptr;
+ if (!certs) return;
+
+ DEBUG2(LOG_PREFIX ": Freeing cached session Certificates");
+
+ fr_pair_list_free(certs);
+ }
+
/** Add all the default ciphers and message digests reate our context.
*
* This should be called exactly once from main, before reading the main config
/*
* Initialize the index for the certificates.
*/
- fr_tls_ex_index_certs = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, NULL);
+ fr_tls_ex_index_certs = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_certs);
}
#ifdef ENABLE_OPENSSL_VERSION_CHECK
SSL_CTX_set_quiet_shutdown(ctx, 1);
if (fr_tls_ex_index_vps < 0)
- fr_tls_ex_index_vps = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, NULL);
+ fr_tls_ex_index_vps = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_vps);
}
/*
}
/*
- * 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.
+ */
+ 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 {
+ 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;
+ }
}
/*
return conf;
}
+
int tls_success(tls_session_t *ssn, REQUEST *request)
{
VALUE_PAIR *vp, *vps = NULL;
* 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) {
projects / freeradius.git / commitdiff