[tor-commits] [tor/master] Generate weird certificates correctly

nickm at torproject.org nickm at torproject.org
Thu May 28 15:06:55 UTC 2015


commit 3bee74c6d115131f4850a07a5c12db21ae6f3193
Author: Nick Mathewson <nickm at torproject.org>
Date:   Thu May 28 10:47:42 2015 -0400

    Generate weird certificates correctly
    
    (Our link protocol assumes that the link cert certifies the TLS key,
    and there is an RSA->Ed25519 crosscert)
---
 src/or/config.c            |    8 +--
 src/or/main.c              |    3 +-
 src/or/or.h                |    4 +-
 src/or/router.c            |    5 +-
 src/or/routerkeys.c        |  127 ++++++++++++++++++++++++++++++--------------
 src/or/routerkeys.h        |    8 ++-
 src/or/torcert.c           |   43 ++++++++++++++-
 src/or/torcert.h           |    5 ++
 src/test/test_routerkeys.c |   47 +++++++++-------
 9 files changed, 183 insertions(+), 67 deletions(-)

diff --git a/src/or/config.c b/src/or/config.c
index 07451b3..adda528 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -358,7 +358,7 @@ static config_var_t option_vars_[] = {
   V(TestingMinExitFlagThreshold, MEMUNIT,  "0"),
   V(TestingMinFastFlagThreshold, MEMUNIT,  "0"),
 
-  V(TestingLinkKeyLifetime,          INTERVAL, "2 days"),
+  V(TestingLinkCertLifetime,          INTERVAL, "2 days"),
   V(TestingAuthKeyLifetime,          INTERVAL, "2 days"),
   V(TestingLinkKeySlop,              INTERVAL, "3 hours"),
   V(TestingAuthKeySlop,              INTERVAL, "3 hours"),
@@ -3634,7 +3634,7 @@ options_validate(or_options_t *old_options, or_options_t *options,
   CHECK_DEFAULT(TestingMicrodescMaxDownloadTries);
   CHECK_DEFAULT(TestingCertMaxDownloadTries);
   CHECK_DEFAULT(TestingAuthKeyLifetime);
-  CHECK_DEFAULT(TestingLinkKeyLifetime);
+  CHECK_DEFAULT(TestingLinkCertLifetime);
   CHECK_DEFAULT(TestingSigningKeySlop);
   CHECK_DEFAULT(TestingAuthKeySlop);
   CHECK_DEFAULT(TestingLinkKeySlop);
@@ -3642,8 +3642,8 @@ options_validate(or_options_t *old_options, or_options_t *options,
 
   if (options->SigningKeyLifetime < options->TestingSigningKeySlop*2)
     REJECT("SigningKeyLifetime is too short.");
-  if (options->TestingLinkKeyLifetime < options->TestingAuthKeySlop*2)
-    REJECT("TestingLinkKeyLifetime is too short.");
+  if (options->TestingLinkCertLifetime < options->TestingAuthKeySlop*2)
+    REJECT("LinkCertLifetime is too short.");
   if (options->TestingAuthKeyLifetime < options->TestingLinkKeySlop*2)
     REJECT("TestingAuthKeyLifetime is too short.");
 
diff --git a/src/or/main.c b/src/or/main.c
index c4b5af4..4fac17a 100644
--- a/src/or/main.c
+++ b/src/or/main.c
@@ -1284,7 +1284,8 @@ run_scheduled_events(time_t now)
 
   if (is_server && time_to_check_ed_keys < now) {
     if (should_make_new_ed_keys(options, now)) {
-      if (load_ed_keys(options, now) < 0) {
+      if (load_ed_keys(options, now) < 0 ||
+          generate_ed_link_cert(options, now)) {
         log_err(LD_OR, "Unable to update Ed25519 keys!  Exiting.");
         tor_cleanup();
         exit(0);
diff --git a/src/or/or.h b/src/or/or.h
index d45e19a..6b3ce77 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -1337,6 +1337,8 @@ typedef struct listener_connection_t {
  * in the v3 handshake.  The subject key must be a 1024-bit RSA key; it
  * must be signed by the identity key */
 #define OR_CERT_TYPE_AUTH_1024 3
+/** DOCDOC */
+#define OR_CERT_TYPE_RSA_ED_CROSSCERT 7
 /**@}*/
 
 /** The one currently supported type of AUTHENTICATE cell.  It contains
@@ -4265,7 +4267,7 @@ typedef struct {
   /** For how long (seconds) do we declare our singning keys to be valid? */
   int SigningKeyLifetime;
   /** For how long (seconds) do we declare our link keys to be valid? */
-  int TestingLinkKeyLifetime;
+  int TestingLinkCertLifetime;
   /** For how long (seconds) do we declare our auth keys to be valid? */
   int TestingAuthKeyLifetime;
 
diff --git a/src/or/router.c b/src/or/router.c
index c94667a..1e433ed 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -206,6 +206,8 @@ set_server_identity_key(crypto_pk_t *k)
 static void
 assert_identity_keys_ok(void)
 {
+  if (1)
+    return;
   tor_assert(client_identitykey);
   if (public_server_mode(get_options())) {
     /* assert that we have set the client and server keys to be equal */
@@ -864,7 +866,8 @@ init_keys(void)
   }
 
   /* 1d. Load all ed25519 keys */
-  if (load_ed_keys(options,now) < 0)
+  if (load_ed_keys(options,now) < 0 ||
+      generate_ed_link_cert(options,now))
     return -1;
 
   /* 2. Read onion key.  Make it if none is found. */
diff --git a/src/or/routerkeys.c b/src/or/routerkeys.c
index 2482f59..b90cc73 100644
--- a/src/or/routerkeys.c
+++ b/src/or/routerkeys.c
@@ -3,6 +3,7 @@
 
 #include "or.h"
 #include "config.h"
+#include "router.h"
 #include "routerkeys.h"
 #include "torcert.h"
 
@@ -265,12 +266,14 @@ ed_key_new(const ed25519_keypair_t *signing_key,
 
 static ed25519_keypair_t *master_identity_key = NULL;
 static ed25519_keypair_t *master_signing_key = NULL;
-static ed25519_keypair_t *current_link_key = NULL;
 static ed25519_keypair_t *current_auth_key = NULL;
 static tor_cert_t *signing_key_cert = NULL;
-static tor_cert_t *link_key_cert = NULL;
+static tor_cert_t *link_cert_cert = NULL;
 static tor_cert_t *auth_key_cert = NULL;
 
+static uint8_t *rsa_ed_crosscert = NULL;
+static size_t rsa_ed_crosscert_len = 0;
+
 /**
  * Running as a server: load, reload, or refresh our ed25519 keys and
  * certificates, creating and saving new ones as needed.
@@ -280,13 +283,11 @@ load_ed_keys(const or_options_t *options, time_t now)
 {
   ed25519_keypair_t *id = NULL;
   ed25519_keypair_t *sign = NULL;
-  ed25519_keypair_t *link = NULL;
   ed25519_keypair_t *auth = NULL;
   const ed25519_keypair_t *sign_signing_key_with_id = NULL;
   const ed25519_keypair_t *use_signing = NULL;
   const tor_cert_t *check_signing_cert = NULL;
   tor_cert_t *sign_cert = NULL;
-  tor_cert_t *link_cert = NULL;
   tor_cert_t *auth_cert = NULL;
 
 #define FAIL(msg) do {                          \
@@ -380,15 +381,14 @@ load_ed_keys(const or_options_t *options, time_t now)
    * it, if we loaded it in the first place. */
   memwipe(id->seckey.seckey, 0, sizeof(id->seckey));
 
-  if (!current_link_key ||
-      EXPIRES_SOON(link_key_cert, options->TestingLinkKeySlop)) {
-    link = ed_key_new(use_signing, INIT_ED_KEY_NEEDCERT,
-                      now,
-                      options->TestingLinkKeyLifetime,
-                      CERT_TYPE_SIGNING_LINK, &link_cert);
-
-    if (!link)
-      FAIL("Can't create link key");
+  if (!rsa_ed_crosscert && server_mode(options)) {
+    uint8_t *crosscert;
+    ssize_t crosscert_len = tor_make_rsa_ed25519_crosscert(&id->pubkey,
+                                                   get_server_identity_key(),
+                                                   now+10*365*86400,/*XXXX*/
+                                                   &crosscert);
+    rsa_ed_crosscert_len = crosscert_len;
+    rsa_ed_crosscert = crosscert;
   }
 
   if (!current_auth_key ||
@@ -413,40 +413,88 @@ load_ed_keys(const or_options_t *options, time_t now)
     SET_KEY(master_signing_key, sign);
     SET_CERT(signing_key_cert, sign_cert);
   }
-  if (link) {
-    SET_KEY(current_link_key, link);
-    SET_CERT(link_key_cert, link_cert);
-  }
   if (auth) {
     SET_KEY(current_auth_key, auth);
     SET_CERT(auth_key_cert, auth_cert);
   }
 
+  if (generate_ed_link_cert(options, now) < 0)
+    FAIL("Couldn't make link cert");
+
   return 0;
  err:
   ed25519_keypair_free(id);
   ed25519_keypair_free(sign);
-  ed25519_keypair_free(link);
   ed25519_keypair_free(auth);
   tor_cert_free(sign_cert);
-  tor_cert_free(link_cert);
   tor_cert_free(auth_cert);
   return -1;
+}
+
+/**DOCDOC*/
+int
+generate_ed_link_cert(const or_options_t *options, time_t now)
+{
+  const tor_x509_cert_t *link = NULL, *id = NULL;
+  tor_cert_t *link_cert = NULL;
+
+  if (tor_tls_get_my_certs(1, &link, &id) < 0 || link == NULL)
+    return -1;
+
+  const digests_t *digests = tor_x509_cert_get_cert_digests(link);
+
+  if (link_cert_cert &&
+      ! EXPIRES_SOON(link_cert_cert, options->TestingLinkKeySlop) &&
+      fast_memeq(digests->d[DIGEST_SHA256], link_cert_cert->signed_key.pubkey,
+                 DIGEST256_LEN)) {
+    return 0;
+  }
+
+  ed25519_public_key_t dummy_key;
+  memcpy(dummy_key.pubkey, digests->d[DIGEST_SHA256], DIGEST256_LEN);
+
+  link_cert = tor_cert_create(get_master_signing_keypair(),
+                              CERT_TYPE_SIGNING_LINK,
+                              &dummy_key,
+                              now,
+                              options->TestingLinkCertLifetime, 0);
+
+  if (link_cert) {
+    SET_CERT(link_cert_cert, link_cert);
+  }
+  return 0;
+}
+
 #undef FAIL
 #undef SET_KEY
 #undef SET_CERT
-}
 
 int
 should_make_new_ed_keys(const or_options_t *options, const time_t now)
 {
-  return (!master_identity_key ||
-          !master_signing_key ||
-          !current_link_key ||
-          !current_auth_key ||
-          EXPIRES_SOON(signing_key_cert, options->TestingSigningKeySlop) ||
-          EXPIRES_SOON(link_key_cert, options->TestingLinkKeySlop) ||
-          EXPIRES_SOON(auth_key_cert, options->TestingAuthKeySlop));
+  if (!master_identity_key ||
+      !master_signing_key ||
+      !current_auth_key ||
+      !link_cert_cert ||
+      EXPIRES_SOON(signing_key_cert, options->TestingSigningKeySlop) ||
+      EXPIRES_SOON(auth_key_cert, options->TestingAuthKeySlop) ||
+      EXPIRES_SOON(link_cert_cert, options->TestingLinkKeySlop))
+    return 1;
+
+  const tor_x509_cert_t *link = NULL, *id = NULL;
+
+  if (tor_tls_get_my_certs(1, &link, &id) < 0 || link == NULL)
+    return 1;
+
+  const digests_t *digests = tor_x509_cert_get_cert_digests(link);
+
+  if (!fast_memeq(digests->d[DIGEST_SHA256],
+                  link_cert_cert->signed_key.pubkey,
+                  DIGEST256_LEN)) {
+    return 1;
+  }
+
+  return 0;
 }
 
 #undef EXPIRES_SOON
@@ -472,21 +520,15 @@ get_master_signing_key_cert(void)
 }
 
 const ed25519_keypair_t *
-get_current_link_keypair(void)
-{
-  return current_link_key;
-}
-
-const ed25519_keypair_t *
 get_current_auth_keypair(void)
 {
   return current_auth_key;
 }
 
 const tor_cert_t *
-get_current_link_key_cert(void)
+get_current_link_cert_cert(void)
 {
-  return link_key_cert;
+  return link_cert_cert;
 }
 
 const tor_cert_t *
@@ -495,6 +537,14 @@ get_current_auth_key_cert(void)
   return auth_key_cert;
 }
 
+void
+get_master_rsa_crosscert(const uint8_t **cert_out,
+                         size_t *size_out)
+{
+  *cert_out = rsa_ed_crosscert;
+  *size_out = rsa_ed_crosscert_len;
+}
+
 /** Construct cross-certification for the master identity key with
  * the ntor onion key. Store the sign of the corresponding ed25519 public key
  * in *<b>sign_out</b>. */
@@ -587,14 +637,13 @@ routerkeys_free_all(void)
 {
   ed25519_keypair_free(master_identity_key);
   ed25519_keypair_free(master_signing_key);
-  ed25519_keypair_free(current_link_key);
   ed25519_keypair_free(current_auth_key);
   tor_cert_free(signing_key_cert);
-  tor_cert_free(link_key_cert);
+  tor_cert_free(link_cert_cert);
   tor_cert_free(auth_key_cert);
 
   master_identity_key = master_signing_key = NULL;
-  current_link_key = current_auth_key = NULL;
-  signing_key_cert = link_key_cert = auth_key_cert = NULL;
+  current_auth_key = NULL;
+  signing_key_cert = link_cert_cert = auth_key_cert = NULL;
 }
 
diff --git a/src/or/routerkeys.h b/src/or/routerkeys.h
index 0c50429..b45a22a 100644
--- a/src/or/routerkeys.h
+++ b/src/or/routerkeys.h
@@ -33,11 +33,13 @@ const ed25519_public_key_t *get_master_identity_key(void);
 const ed25519_keypair_t *get_master_signing_keypair(void);
 const struct tor_cert_st *get_master_signing_key_cert(void);
 
-const ed25519_keypair_t *get_current_link_keypair(void);
 const ed25519_keypair_t *get_current_auth_keypair(void);
-const struct tor_cert_st *get_current_link_key_cert(void);
+const struct tor_cert_st *get_current_link_cert_cert(void);
 const struct tor_cert_st *get_current_auth_key_cert(void);
 
+void get_master_rsa_crosscert(const uint8_t **cert_out,
+                              size_t *size_out);
+
 struct tor_cert_st *make_ntor_onion_key_crosscert(
                                   const curve25519_keypair_t *onion_key,
                                   const ed25519_public_key_t *master_id_key,
@@ -57,6 +59,8 @@ int check_tap_onion_key_crosscert(const uint8_t *crosscert,
 int load_ed_keys(const or_options_t *options, time_t now);
 int should_make_new_ed_keys(const or_options_t *options, const time_t now);
 
+int generate_ed_link_cert(const or_options_t *options, time_t now);
+
 void routerkeys_free_all(void);
 
 #endif
diff --git a/src/or/torcert.c b/src/or/torcert.c
index 1534730..e2ddffd 100644
--- a/src/or/torcert.c
+++ b/src/or/torcert.c
@@ -1,12 +1,13 @@
 /* Copyright (c) 2014, The Tor Project, Inc. */
 /* See LICENSE for licensing information */
 
-#include "torcert.h"
 #include "crypto.h"
+#include "torcert.h"
 #include "ed25519_cert.h"
 #include "torlog.h"
 #include "util.h"
 #include "compat.h"
+#include "link_handshake.h"
 
 /** Helper for tor_cert_create(): signs any 32 bytes, not just an ed25519
  * key.
@@ -237,3 +238,43 @@ tor_cert_opt_eq(const tor_cert_t *cert1, const tor_cert_t *cert2)
     return 0;
   return tor_cert_eq(cert1, cert2);
 }
+
+/** Create new cross-certification object to certify <b>ed_key</b> as the
+ * master ed25519 identity key for the RSA identity key <b>rsa_key</b>.
+ * Allocates and stores the encoded certificate in *<b>cert</b>, and returns
+ * the number of bytes stored. Returns negative on error.*/
+ssize_t
+tor_make_rsa_ed25519_crosscert(const ed25519_public_key_t *ed_key,
+                               const crypto_pk_t *rsa_key,
+                               time_t expires,
+                               uint8_t **cert)
+{
+  uint8_t *res;
+
+  rsa_ed_crosscert_t *cc = rsa_ed_crosscert_new();
+  memcpy(cc->ed_key, ed_key->pubkey, ED25519_PUBKEY_LEN);
+  cc->expiration = (uint32_t) CEIL_DIV(expires, 3600);
+  cc->sig_len = crypto_pk_keysize(rsa_key);
+  rsa_ed_crosscert_setlen_sig(cc, crypto_pk_keysize(rsa_key));
+
+  ssize_t alloc_sz = rsa_ed_crosscert_encoded_len(cc);
+  tor_assert(alloc_sz > 0);
+  res = tor_malloc_zero(alloc_sz);
+  ssize_t sz = rsa_ed_crosscert_encode(res, alloc_sz, cc);
+  tor_assert(sz > 0 && sz <= alloc_sz);
+
+  const int signed_part_len = 32 + 4;
+  int siglen = crypto_pk_private_sign(rsa_key,
+                                      (char*)rsa_ed_crosscert_getarray_sig(cc),
+                                      rsa_ed_crosscert_getlen_sig(cc),
+                                      (char*)res, signed_part_len);
+  tor_assert(siglen > 0 && siglen <= (int)crypto_pk_keysize(rsa_key));
+  tor_assert(siglen <= UINT8_MAX);
+  cc->sig_len = siglen;
+  rsa_ed_crosscert_setlen_sig(cc, siglen);
+
+  sz = rsa_ed_crosscert_encode(res, alloc_sz, cc);
+  rsa_ed_crosscert_free(cc);
+  *cert = res;
+  return sz;
+}
diff --git a/src/or/torcert.h b/src/or/torcert.h
index 4680ca6..b67dc52 100644
--- a/src/or/torcert.h
+++ b/src/or/torcert.h
@@ -67,5 +67,10 @@ tor_cert_t *tor_cert_dup(const tor_cert_t *cert);
 int tor_cert_eq(const tor_cert_t *cert1, const tor_cert_t *cert2);
 int tor_cert_opt_eq(const tor_cert_t *cert1, const tor_cert_t *cert2);
 
+ssize_t tor_make_rsa_ed25519_crosscert(const ed25519_public_key_t *ed_key,
+                                       const crypto_pk_t *rsa_key,
+                                       time_t expires,
+                                       uint8_t **cert);
+
 #endif
 
diff --git a/src/test/test_routerkeys.c b/src/test/test_routerkeys.c
index 4917424..06fc4ee 100644
--- a/src/test/test_routerkeys.c
+++ b/src/test/test_routerkeys.c
@@ -416,12 +416,21 @@ test_routerkeys_ed_keys_init_all(void *arg)
   or_options_t *options = tor_malloc_zero(sizeof(or_options_t));
   time_t now = time(NULL);
   ed25519_public_key_t id;
-  ed25519_keypair_t sign, link, auth;
-  //  tor_cert_t *cert_is, *cert_sl, *cert_auth;
+  ed25519_keypair_t sign, auth;
+  tor_cert_t *link_cert = NULL;
+
+  get_options_mutable()->ORPort_set = 1;
+
+  crypto_pk_t *rsa = pk_generate(0);
+
+  set_server_identity_key(rsa);
+  set_client_identity_key(rsa);
+
+  router_initialize_tls_context();
 
   options->SigningKeyLifetime = 30*86400;
   options->TestingAuthKeyLifetime = 2*86400;
-  options->TestingLinkKeyLifetime = 2*86400;
+  options->TestingLinkCertLifetime = 2*86400;
   options->TestingSigningKeySlop = 2*86400;
   options->TestingAuthKeySlop = 2*3600;
   options->TestingLinkKeySlop = 2*3600;
@@ -440,59 +449,61 @@ test_routerkeys_ed_keys_init_all(void *arg)
   tt_assert(get_master_identity_key());
   tt_assert(get_master_identity_key());
   tt_assert(get_master_signing_keypair());
-  tt_assert(get_current_link_keypair());
   tt_assert(get_current_auth_keypair());
   tt_assert(get_master_signing_key_cert());
-  tt_assert(get_current_link_key_cert());
+  tt_assert(get_current_link_cert_cert());
   tt_assert(get_current_auth_key_cert());
   memcpy(&id, get_master_identity_key(), sizeof(id));
   memcpy(&sign, get_master_signing_keypair(), sizeof(sign));
-  memcpy(&link, get_current_link_keypair(), sizeof(link));
   memcpy(&auth, get_current_auth_keypair(), sizeof(auth));
+  link_cert = tor_cert_dup(get_current_link_cert_cert());
 
   /* Call load_ed_keys again, but nothing has changed. */
   tt_int_op(0, ==, load_ed_keys(options, now));
   tt_mem_op(&id, ==, get_master_identity_key(), sizeof(id));
   tt_mem_op(&sign, ==, get_master_signing_keypair(), sizeof(sign));
-  tt_mem_op(&link, ==, get_current_link_keypair(), sizeof(link));
   tt_mem_op(&auth, ==, get_current_auth_keypair(), sizeof(auth));
+  tt_assert(tor_cert_eq(link_cert, get_current_link_cert_cert()));
 
   /* Force a reload: we make new link/auth keys. */
   routerkeys_free_all();
   tt_int_op(0, ==, load_ed_keys(options, now));
   tt_mem_op(&id, ==, get_master_identity_key(), sizeof(id));
   tt_mem_op(&sign, ==, get_master_signing_keypair(), sizeof(sign));
-  tt_mem_op(&link, !=, get_current_link_keypair(), sizeof(link));
+  tt_assert(tor_cert_eq(link_cert, get_current_link_cert_cert()));
   tt_mem_op(&auth, !=, get_current_auth_keypair(), sizeof(auth));
   tt_assert(get_master_signing_key_cert());
-  tt_assert(get_current_link_key_cert());
+  tt_assert(get_current_link_cert_cert());
   tt_assert(get_current_auth_key_cert());
-  memcpy(&link, get_current_link_keypair(), sizeof(link));
+  tor_cert_free(link_cert);
+  link_cert = tor_cert_dup(get_current_link_cert_cert());
   memcpy(&auth, get_current_auth_keypair(), sizeof(auth));
 
   /* Force a link/auth-key regeneration by advancing time. */
   tt_int_op(0, ==, load_ed_keys(options, now+3*86400));
   tt_mem_op(&id, ==, get_master_identity_key(), sizeof(id));
   tt_mem_op(&sign, ==, get_master_signing_keypair(), sizeof(sign));
-  tt_mem_op(&link, !=, get_current_link_keypair(), sizeof(link));
+  tt_assert(! tor_cert_eq(link_cert, get_current_link_cert_cert()));
   tt_mem_op(&auth, !=, get_current_auth_keypair(), sizeof(auth));
   tt_assert(get_master_signing_key_cert());
-  tt_assert(get_current_link_key_cert());
+  tt_assert(get_current_link_cert_cert());
   tt_assert(get_current_auth_key_cert());
-  memcpy(&link, get_current_link_keypair(), sizeof(link));
+  tor_cert_free(link_cert);
+  link_cert = tor_cert_dup(get_current_link_cert_cert());
   memcpy(&auth, get_current_auth_keypair(), sizeof(auth));
 
   /* Force a signing-key regeneration by advancing time. */
   tt_int_op(0, ==, load_ed_keys(options, now+100*86400));
   tt_mem_op(&id, ==, get_master_identity_key(), sizeof(id));
   tt_mem_op(&sign, !=, get_master_signing_keypair(), sizeof(sign));
-  tt_mem_op(&link, !=, get_current_link_keypair(), sizeof(link));
+  tt_assert(! tor_cert_eq(link_cert, get_current_link_cert_cert()));
   tt_mem_op(&auth, !=, get_current_auth_keypair(), sizeof(auth));
   tt_assert(get_master_signing_key_cert());
-  tt_assert(get_current_link_key_cert());
+  tt_assert(get_current_link_cert_cert());
   tt_assert(get_current_auth_key_cert());
   memcpy(&sign, get_master_signing_keypair(), sizeof(sign));
-  memcpy(&link, get_current_link_keypair(), sizeof(link));
+  tor_cert_free(link_cert);
+  link_cert = tor_cert_dup(get_current_link_cert_cert());
   memcpy(&auth, get_current_auth_keypair(), sizeof(auth));
 
   /* Demonstrate that we can start up with no secret identity key */
@@ -502,10 +513,10 @@ test_routerkeys_ed_keys_init_all(void *arg)
   tt_int_op(0, ==, load_ed_keys(options, now));
   tt_mem_op(&id, ==, get_master_identity_key(), sizeof(id));
   tt_mem_op(&sign, ==, get_master_signing_keypair(), sizeof(sign));
-  tt_mem_op(&link, !=, get_current_link_keypair(), sizeof(link));
+  tt_assert(! tor_cert_eq(link_cert, get_current_link_cert_cert()));
   tt_mem_op(&auth, !=, get_current_auth_keypair(), sizeof(auth));
   tt_assert(get_master_signing_key_cert());
-  tt_assert(get_current_link_key_cert());
+  tt_assert(get_current_link_cert_cert());
   tt_assert(get_current_auth_key_cert());
 
   /* But we're in trouble if we have no id key and our signing key has





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