Remove the client-side code for the v1 and v2 tls handshakes.

(This is safe since super-old Tor servers are no longer allowed on
the network.)

Closes the client-side part of 11150.

1 files changed, 0 insertions, 139 deletions

diff --git a/src/common/tortls.c b/src/common/tortls.c
index 156750853e..eda65a9538 100644
--- a/src/common/tortls.c
+++ b/src/common/tortls.c
@@ -1985,52 +1985,6 @@ tor_tls_finish_handshake(tor_tls_t *tls)
   return r;
 }
 
-#ifdef USE_BUFFEREVENTS
-/** Put <b>tls</b>, which must be a client connection, into renegotiation
- * mode. */
-int
-tor_tls_start_renegotiating(tor_tls_t *tls)
-{
-  int r = SSL_renegotiate(tls->ssl);
-  if (r <= 0) {
-    return tor_tls_get_error(tls, r, 0, "renegotiating", LOG_WARN,
-                             LD_HANDSHAKE);
-  }
-  return 0;
-}
-#endif
-
-/** Client only: Renegotiate a TLS session.  When finished, returns
- * TOR_TLS_DONE.  On failure, returns TOR_TLS_ERROR, TOR_TLS_WANTREAD, or
- * TOR_TLS_WANTWRITE.
- */
-int
-tor_tls_renegotiate(tor_tls_t *tls)
-{
-  int r;
-  tor_assert(tls);
-  /* We could do server-initiated renegotiation too, but that would be tricky.
-   * Instead of "SSL_renegotiate, then SSL_do_handshake until done" */
-  tor_assert(!tls->isServer);
-
-  check_no_tls_errors();
-  if (tls->state != TOR_TLS_ST_RENEGOTIATE) {
-    int r = SSL_renegotiate(tls->ssl);
-    if (r <= 0) {
-      return tor_tls_get_error(tls, r, 0, "renegotiating", LOG_WARN,
-                               LD_HANDSHAKE);
-    }
-    tls->state = TOR_TLS_ST_RENEGOTIATE;
-  }
-  r = SSL_do_handshake(tls->ssl);
-  if (r == 1) {
-    tls->state = TOR_TLS_ST_OPEN;
-    return TOR_TLS_DONE;
-  } else
-    return tor_tls_get_error(tls, r, 0, "renegotiating handshake", LOG_INFO,
-                             LD_HANDSHAKE);
-}
-
 /** Shut down an open tls connection <b>tls</b>.  When finished, returns
  * TOR_TLS_DONE.  On failure, returns TOR_TLS_ERROR, TOR_TLS_WANTREAD,
  * or TOR_TLS_WANTWRITE.
@@ -2424,99 +2378,6 @@ tor_tls_used_v1_handshake(tor_tls_t *tls)
 #endif
 }
 
-/** Return true iff <b>name</b> is a DN of a kind that could only
- * occur in a v3-handshake-indicating certificate */
-STATIC int
-dn_indicates_v3_cert(X509_NAME *name)
-{
-#ifdef DISABLE_V3_LINKPROTO_CLIENTSIDE
-  (void)name;
-  return 0;
-#else
-  X509_NAME_ENTRY *entry;
-  int n_entries;
-  ASN1_OBJECT *obj;
-  ASN1_STRING *str;
-  unsigned char *s;
-  int len, r;
-
-  n_entries = X509_NAME_entry_count(name);
-  if (n_entries != 1) {
-    return 1; /* More than one entry in the DN. */
-  }
-  entry = X509_NAME_get_entry(name, 0);
-
-  obj = X509_NAME_ENTRY_get_object(entry);
-  if (OBJ_obj2nid(obj) != OBJ_txt2nid("commonName")) {
-    return 1; /* The entry isn't a commonName. */
-  }
-
-  str = X509_NAME_ENTRY_get_data(entry);
-  len = ASN1_STRING_to_UTF8(&s, str);
-  if (len < 0) {
-    return 0;
-  }
-  r = fast_memneq(s + len - 4, ".net", 4);
-  OPENSSL_free(s);
-  return r;
-#endif
-}
-
-/** Return true iff the peer certificate we're received on <b>tls</b>
- * indicates that this connection should use the v3 (in-protocol)
- * authentication handshake.
- *
- * Only the connection initiator should use this, and only once the initial
- * handshake is done; the responder detects a v1 handshake by cipher types,
- * and a v3/v2 handshake by Versions cell vs renegotiation.
- */
-int
-tor_tls_received_v3_certificate(tor_tls_t *tls)
-{
-  check_no_tls_errors();
-
-  X509 *cert = SSL_get_peer_certificate(tls->ssl);
-  EVP_PKEY *key = NULL;
-  X509_NAME *issuer_name, *subject_name;
-  int is_v3 = 0;
-
-  if (!cert) {
-    log_warn(LD_BUG, "Called on a connection with no peer certificate");
-    goto done;
-  }
-
-  subject_name = X509_get_subject_name(cert);
-  issuer_name = X509_get_issuer_name(cert);
-
-  if (X509_name_cmp(subject_name, issuer_name) == 0) {
-    is_v3 = 1; /* purportedly self signed */
-    goto done;
-  }
-
-  if (dn_indicates_v3_cert(subject_name) ||
-      dn_indicates_v3_cert(issuer_name)) {
-    is_v3 = 1; /* DN is fancy */
-    goto done;
-  }
-
-  key = X509_get_pubkey(cert);
-  if (EVP_PKEY_bits(key) != 1024 ||
-      EVP_PKEY_type(key->type) != EVP_PKEY_RSA) {
-    is_v3 = 1; /* Key is fancy */
-    goto done;
-  }
-
- done:
-  tls_log_errors(tls, LOG_WARN, LD_NET, "checking for a v3 cert");
-
-  if (key)
-    EVP_PKEY_free(key);
-  if (cert)
-    X509_free(cert);
-
-  return is_v3;
-}
-
 /** Return the number of server handshakes that we've noticed doing on
  * <b>tls</b>. */
 int