Pre-declare all core dispatch table functions, and fix the internal ones

When assigning pointers to functions in an OSSL_DISPATCH table, we try
to ensure that those functions are properly defined or declared with
an extra declaration using the corresponding function typedefs that
are defined by include/openssl/core_dispatch.h.

For the core dispatch table, found in crypto/provider_core.c, it seems
we forgot this habit, and thus didn't ensure well enough that the
function pointers that are assigned in the table can actually be used
for those dispatch table indexes.

This change adds all the missing declarations, and compensates for
differences with functions that do the necessary casting, making those
explicit rather than implicit, thereby trying to assure that we know
what we're doing.

One function is not fixed in this change, because there's a controversy,
a clash between the signature of BIO_ctrl() and OSSL_FUNC_BIO_ctrl_fn.
They have different return types.

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18198)

1 files changed, 77 insertions, 7 deletions

diff --git a/crypto/provider_core.c b/crypto/provider_core.c
index 6f82b29835..a2ac1ab052 100644
--- a/crypto/provider_core.c
+++ b/crypto/provider_core.c
@@ -1822,8 +1822,8 @@ static const OSSL_PARAM param_types[] = {
  */
 static OSSL_FUNC_core_gettable_params_fn core_gettable_params;
 static OSSL_FUNC_core_get_params_fn core_get_params;
-static OSSL_FUNC_core_thread_start_fn core_thread_start;
 static OSSL_FUNC_core_get_libctx_fn core_get_libctx;
+static OSSL_FUNC_core_thread_start_fn core_thread_start;
 #ifndef FIPS_MODULE
 static OSSL_FUNC_core_new_error_fn core_new_error;
 static OSSL_FUNC_core_set_error_debug_fn core_set_error_debug;
@@ -1831,6 +1831,42 @@ static OSSL_FUNC_core_vset_error_fn core_vset_error;
 static OSSL_FUNC_core_set_error_mark_fn core_set_error_mark;
 static OSSL_FUNC_core_clear_last_error_mark_fn core_clear_last_error_mark;
 static OSSL_FUNC_core_pop_error_to_mark_fn core_pop_error_to_mark;
+OSSL_FUNC_BIO_new_file_fn ossl_core_bio_new_file;
+OSSL_FUNC_BIO_new_membuf_fn ossl_core_bio_new_mem_buf;
+OSSL_FUNC_BIO_read_ex_fn ossl_core_bio_read_ex;
+OSSL_FUNC_BIO_write_ex_fn ossl_core_bio_write_ex;
+OSSL_FUNC_BIO_gets_fn ossl_core_bio_gets;
+OSSL_FUNC_BIO_puts_fn ossl_core_bio_puts;
+OSSL_FUNC_BIO_up_ref_fn ossl_core_bio_up_ref;
+OSSL_FUNC_BIO_free_fn ossl_core_bio_free;
+OSSL_FUNC_BIO_vprintf_fn ossl_core_bio_vprintf;
+OSSL_FUNC_BIO_vsnprintf_fn BIO_vsnprintf;
+static OSSL_FUNC_self_test_cb_fn core_self_test_get_callback;
+OSSL_FUNC_get_entropy_fn ossl_rand_get_entropy;
+OSSL_FUNC_cleanup_entropy_fn ossl_rand_cleanup_entropy;
+OSSL_FUNC_get_nonce_fn ossl_rand_get_nonce;
+OSSL_FUNC_cleanup_nonce_fn ossl_rand_cleanup_nonce;
+#endif
+OSSL_FUNC_CRYPTO_malloc_fn CRYPTO_malloc;
+OSSL_FUNC_CRYPTO_zalloc_fn CRYPTO_zalloc;
+OSSL_FUNC_CRYPTO_free_fn CRYPTO_free;
+OSSL_FUNC_CRYPTO_clear_free_fn CRYPTO_clear_free;
+OSSL_FUNC_CRYPTO_realloc_fn CRYPTO_realloc;
+OSSL_FUNC_CRYPTO_clear_realloc_fn CRYPTO_clear_realloc;
+OSSL_FUNC_CRYPTO_secure_malloc_fn CRYPTO_secure_malloc;
+OSSL_FUNC_CRYPTO_secure_zalloc_fn CRYPTO_secure_zalloc;
+OSSL_FUNC_CRYPTO_secure_free_fn CRYPTO_secure_free;
+OSSL_FUNC_CRYPTO_secure_clear_free_fn CRYPTO_secure_clear_free;
+OSSL_FUNC_CRYPTO_secure_allocated_fn CRYPTO_secure_allocated;
+OSSL_FUNC_OPENSSL_cleanse_fn OPENSSL_cleanse;
+#ifndef FIPS_MODULE
+OSSL_FUNC_provider_register_child_cb_fn ossl_provider_register_child_cb;
+OSSL_FUNC_provider_deregister_child_cb_fn ossl_provider_deregister_child_cb;
+static OSSL_FUNC_provider_name_fn core_provider_get0_name;
+static OSSL_FUNC_provider_get0_provider_ctx_fn core_provider_get0_provider_ctx;
+static OSSL_FUNC_provider_get0_dispatch_fn core_provider_get0_dispatch;
+static OSSL_FUNC_provider_up_ref_fn core_provider_up_ref_intern;
+static OSSL_FUNC_provider_free_fn core_provider_free_intern;
 static OSSL_FUNC_core_obj_add_sigid_fn core_obj_add_sigid;
 static OSSL_FUNC_core_obj_create_fn core_obj_create;
 #endif
@@ -1964,6 +2000,40 @@ static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
     return ERR_pop_to_mark();
 }
 
+static void core_self_test_get_callback(OPENSSL_CORE_CTX *libctx,
+                                        OSSL_CALLBACK **cb, void **cbarg)
+{
+    OSSL_SELF_TEST_get_callback((OSSL_LIB_CTX *)libctx, cb, cbarg);
+}
+
+static const char *core_provider_get0_name(const OSSL_CORE_HANDLE *prov)
+{
+    return OSSL_PROVIDER_get0_name((const OSSL_PROVIDER *)prov);
+}
+
+static void *core_provider_get0_provider_ctx(const OSSL_CORE_HANDLE *prov)
+{
+    return OSSL_PROVIDER_get0_provider_ctx((const OSSL_PROVIDER *)prov);
+}
+
+static const OSSL_DISPATCH *
+core_provider_get0_dispatch(const OSSL_CORE_HANDLE *prov)
+{
+    return OSSL_PROVIDER_get0_dispatch((const OSSL_PROVIDER *)prov);
+}
+
+static int core_provider_up_ref_intern(const OSSL_CORE_HANDLE *prov,
+                                       int activate)
+{
+    return provider_up_ref_intern((OSSL_PROVIDER *)prov, activate);
+}
+
+static int core_provider_free_intern(const OSSL_CORE_HANDLE *prov,
+                                     int deactivate)
+{
+    return provider_free_intern((OSSL_PROVIDER *)prov, deactivate);
+}
+
 static int core_obj_add_sigid(const OSSL_CORE_HANDLE *prov,
                               const char *sign_name, const char *digest_name,
                               const char *pkey_name)
@@ -2028,7 +2098,7 @@ static const OSSL_DISPATCH core_dispatch_[] = {
     { OSSL_FUNC_BIO_FREE, (void (*)(void))ossl_core_bio_free },
     { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))ossl_core_bio_vprintf },
     { OSSL_FUNC_BIO_VSNPRINTF, (void (*)(void))BIO_vsnprintf },
-    { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))OSSL_SELF_TEST_get_callback },
+    { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))core_self_test_get_callback },
     { OSSL_FUNC_GET_ENTROPY, (void (*)(void))ossl_rand_get_entropy },
     { OSSL_FUNC_CLEANUP_ENTROPY, (void (*)(void))ossl_rand_cleanup_entropy },
     { OSSL_FUNC_GET_NONCE, (void (*)(void))ossl_rand_get_nonce },
@@ -2054,15 +2124,15 @@ static const OSSL_DISPATCH core_dispatch_[] = {
     { OSSL_FUNC_PROVIDER_DEREGISTER_CHILD_CB,
         (void (*)(void))ossl_provider_deregister_child_cb },
     { OSSL_FUNC_PROVIDER_NAME,
-        (void (*)(void))OSSL_PROVIDER_get0_name },
+        (void (*)(void))core_provider_get0_name },
     { OSSL_FUNC_PROVIDER_GET0_PROVIDER_CTX,
-        (void (*)(void))OSSL_PROVIDER_get0_provider_ctx },
+        (void (*)(void))core_provider_get0_provider_ctx },
     { OSSL_FUNC_PROVIDER_GET0_DISPATCH,
-        (void (*)(void))OSSL_PROVIDER_get0_dispatch },
+        (void (*)(void))core_provider_get0_dispatch },
     { OSSL_FUNC_PROVIDER_UP_REF,
-        (void (*)(void))provider_up_ref_intern },
+        (void (*)(void))core_provider_up_ref_intern },
     { OSSL_FUNC_PROVIDER_FREE,
-        (void (*)(void))provider_free_intern },
+        (void (*)(void))core_provider_free_intern },
     { OSSL_FUNC_CORE_OBJ_ADD_SIGID, (void (*)(void))core_obj_add_sigid },
     { OSSL_FUNC_CORE_OBJ_CREATE, (void (*)(void))core_obj_create },
 #endif