Add APIs for custom X509_LOOKUP_METHOD creation

OpenSSL 1.1.0 made the X509_LOOKUP_METHOD structure opaque, so
applications that were previously able to define a custom lookup method
are not able to be ported.

This commit adds getters and setters for each of the current fields of
X509_LOOKUP_METHOD, along with getters and setters on several associated
opaque types (such as X509_LOOKUP and X509_OBJECT).

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6152)

1 files changed, 166 insertions, 0 deletions

diff --git a/crypto/x509/x509_meth.c b/crypto/x509/x509_meth.c
new file mode 100644
index 0000000000..05ed4bf863
--- /dev/null
+++ b/crypto/x509/x509_meth.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <time.h>
+#include <errno.h>
+
+#include "internal/cryptlib.h"
+#include <openssl/asn1.h>
+#include <openssl/x509.h>
+#include <openssl/ossl_typ.h>
+#include "x509_lcl.h"
+
+X509_LOOKUP_METHOD *X509_LOOKUP_meth_new(const char *name)
+{
+    X509_LOOKUP_METHOD *method = OPENSSL_zalloc(sizeof(X509_LOOKUP_METHOD));
+
+    if (method != NULL) {
+        method->name = OPENSSL_strdup(name);
+        if (method->name == NULL) {
+            X509err(X509_F_X509_LOOKUP_METH_NEW, ERR_R_MALLOC_FAILURE);
+            goto err;
+        }
+    }
+
+    return method;
+
+err:
+    OPENSSL_free(method);
+    return NULL;
+}
+
+void X509_LOOKUP_meth_free(X509_LOOKUP_METHOD *method)
+{
+    if (method != NULL)
+        OPENSSL_free(method->name);
+    OPENSSL_free(method);
+}
+
+int X509_LOOKUP_meth_set_new_item(X509_LOOKUP_METHOD *method,
+                                  int (*new_item) (X509_LOOKUP *ctx))
+{
+    method->new_item = new_item;
+    return 1;
+}
+
+int (*X509_LOOKUP_meth_get_new_item(const X509_LOOKUP_METHOD* method))
+    (X509_LOOKUP *ctx)
+{
+    return method->new_item;
+}
+
+int X509_LOOKUP_meth_set_free(
+    X509_LOOKUP_METHOD *method,
+    void (*free) (X509_LOOKUP *ctx))
+{
+    method->free = free;
+    return 1;
+}
+
+void (*X509_LOOKUP_meth_get_free(const X509_LOOKUP_METHOD* method))
+    (X509_LOOKUP *ctx)
+{
+    return method->free;
+}
+
+int X509_LOOKUP_meth_set_init(X509_LOOKUP_METHOD *method,
+                              int (*init) (X509_LOOKUP *ctx))
+{
+    method->init = init;
+    return 1;
+}
+
+int (*X509_LOOKUP_meth_get_init(const X509_LOOKUP_METHOD* method))
+    (X509_LOOKUP *ctx)
+{
+    return method->init;
+}
+
+int X509_LOOKUP_meth_set_shutdown(
+    X509_LOOKUP_METHOD *method,
+    int (*shutdown) (X509_LOOKUP *ctx))
+{
+    method->shutdown = shutdown;
+    return 1;
+}
+
+int (*X509_LOOKUP_meth_get_shutdown(const X509_LOOKUP_METHOD* method))
+    (X509_LOOKUP *ctx)
+{
+    return method->shutdown;
+}
+
+int X509_LOOKUP_meth_set_ctrl(
+    X509_LOOKUP_METHOD *method,
+    X509_LOOKUP_ctrl_fn ctrl)
+{
+    method->ctrl = ctrl;
+    return 1;
+}
+
+X509_LOOKUP_ctrl_fn X509_LOOKUP_meth_get_ctrl(const X509_LOOKUP_METHOD *method)
+{
+    return method->ctrl;
+}
+
+int X509_LOOKUP_meth_set_get_by_subject(X509_LOOKUP_METHOD *method,
+    X509_LOOKUP_get_by_subject_fn get_by_subject)
+{
+    method->get_by_subject = get_by_subject;
+    return 1;
+}
+
+X509_LOOKUP_get_by_subject_fn X509_LOOKUP_meth_get_get_by_subject(
+    const X509_LOOKUP_METHOD *method)
+{
+    return method->get_by_subject;
+}
+
+
+int X509_LOOKUP_meth_set_get_by_issuer_serial(X509_LOOKUP_METHOD *method,
+    X509_LOOKUP_get_by_issuer_serial_fn get_by_issuer_serial)
+{
+    method->get_by_issuer_serial = get_by_issuer_serial;
+    return 1;
+}
+
+X509_LOOKUP_get_by_issuer_serial_fn
+    X509_LOOKUP_meth_get_get_by_issuer_serial(const X509_LOOKUP_METHOD *method)
+{
+    return method->get_by_issuer_serial;
+}
+
+
+int X509_LOOKUP_meth_set_get_by_fingerprint(X509_LOOKUP_METHOD *method,
+    X509_LOOKUP_get_by_fingerprint_fn get_by_fingerprint)
+{
+    method->get_by_fingerprint = get_by_fingerprint;
+    return 1;
+}
+
+X509_LOOKUP_get_by_fingerprint_fn X509_LOOKUP_meth_get_get_by_fingerprint(
+    const X509_LOOKUP_METHOD *method)
+{
+    return method->get_by_fingerprint;
+}
+
+int X509_LOOKUP_meth_set_get_by_alias(X509_LOOKUP_METHOD *method,
+                                      X509_LOOKUP_get_by_alias_fn get_by_alias)
+{
+    method->get_by_alias = get_by_alias;
+    return 1;
+}
+
+X509_LOOKUP_get_by_alias_fn X509_LOOKUP_meth_get_get_by_alias(
+    const X509_LOOKUP_METHOD *method)
+{
+    return method->get_by_alias;
+}
+