Mock rsa_ed25519_crosscert_check

This commit just mocks the rsa_ed25519_crosscert_check to be used later
in the fuzzer.

src/or/torcert.c

@@ -356,12 +356,12 @@ tor_make_rsa_ed25519_crosscert(const ed25519_public_key_t *ed_key,
  *
  * Return 0 on success, negative on failure.
  */
-int
-rsa_ed25519_crosscert_check(const uint8_t *crosscert,
-                            const size_t crosscert_len,
-                            const crypto_pk_t *rsa_id_key,
-                            const ed25519_public_key_t *master_key,
-                            const time_t reject_if_expired_before)
+MOCK_IMPL(int,
+rsa_ed25519_crosscert_check, (const uint8_t *crosscert,
+                              const size_t crosscert_len,
+                              const crypto_pk_t *rsa_id_key,
+                              const ed25519_public_key_t *master_key,
+                              const time_t reject_if_expired_before))
 {
   rsa_ed_crosscert_t *cc = NULL;
   int rv;

src/or/torcert.h

@@ -75,11 +75,12 @@ 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);
-int rsa_ed25519_crosscert_check(const uint8_t *crosscert,
-                                const size_t crosscert_len,
-                                const crypto_pk_t *rsa_id_key,
-                                const ed25519_public_key_t *master_key,
-                                const time_t reject_if_expired_before);
+MOCK_DECL(int,
+rsa_ed25519_crosscert_check, (const uint8_t *crosscert,
+                              const size_t crosscert_len,
+                              const crypto_pk_t *rsa_id_key,
+                              const ed25519_public_key_t *master_key,
+                              const time_t reject_if_expired_before));
 
 or_handshake_certs_t *or_handshake_certs_new(void);
 void or_handshake_certs_free(or_handshake_certs_t *certs);