--- /dev/null
+/* v3_lib.c */
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 1999.
+ */
+/* ====================================================================
+ * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* X509 v3 extension utilities */
+
+#include <stdio.h>
+
+#include <openssl/conf.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+#include <openssl/obj.h>
+#include <openssl/x509v3.h>
+
+#include "ext_dat.h"
+static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL;
+
+static void ext_list_free(X509V3_EXT_METHOD *ext);
+
+static int ext_stack_cmp(const X509V3_EXT_METHOD **a,
+ const X509V3_EXT_METHOD **b)
+{
+ return ((*a)->ext_nid - (*b)->ext_nid);
+}
+
+int X509V3_EXT_add(X509V3_EXT_METHOD *ext)
+{
+ if (!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_stack_cmp))) {
+ OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
+ ext_list_free(ext);
+ return 0;
+ }
+ if (!sk_X509V3_EXT_METHOD_push(ext_list, ext)) {
+ OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
+ ext_list_free(ext);
+ return 0;
+ }
+ return 1;
+}
+
+static int ext_cmp(const void *void_a, const void *void_b)
+{
+ const X509V3_EXT_METHOD **a = (const X509V3_EXT_METHOD **)void_a;
+ const X509V3_EXT_METHOD **b = (const X509V3_EXT_METHOD **)void_b;
+ return ext_stack_cmp(a, b);
+}
+
+const X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)
+{
+ X509V3_EXT_METHOD tmp;
+ const X509V3_EXT_METHOD *t = &tmp, *const *ret;
+ size_t idx;
+
+ if (nid < 0)
+ return NULL;
+ tmp.ext_nid = nid;
+ ret =
+ bsearch(&t, standard_exts, STANDARD_EXTENSION_COUNT,
+ sizeof(X509V3_EXT_METHOD *), ext_cmp);
+ if (ret)
+ return *ret;
+ if (!ext_list)
+ return NULL;
+
+ if (!sk_X509V3_EXT_METHOD_find(ext_list, &idx, &tmp))
+ return NULL;
+ return sk_X509V3_EXT_METHOD_value(ext_list, idx);
+}
+
+const X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)
+{
+ int nid;
+ if ((nid = OBJ_obj2nid(ext->object)) == NID_undef)
+ return NULL;
+ return X509V3_EXT_get_nid(nid);
+}
+
+int X509V3_EXT_free(int nid, void *ext_data)
+{
+ const X509V3_EXT_METHOD *ext_method = X509V3_EXT_get_nid(nid);
+ if (ext_method == NULL) {
+ OPENSSL_PUT_ERROR(X509V3, X509V3_R_CANNOT_FIND_FREE_FUNCTION);
+ return 0;
+ }
+
+ if (ext_method->it != NULL)
+ ASN1_item_free(ext_data, ASN1_ITEM_ptr(ext_method->it));
+ else if (ext_method->ext_free != NULL)
+ ext_method->ext_free(ext_data);
+ else {
+ OPENSSL_PUT_ERROR(X509V3, X509V3_R_CANNOT_FIND_FREE_FUNCTION);
+ return 0;
+ }
+
+ return 1;
+}
+
+int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)
+{
+ for (; extlist->ext_nid != -1; extlist++)
+ if (!X509V3_EXT_add(extlist))
+ return 0;
+ return 1;
+}
+
+int X509V3_EXT_add_alias(int nid_to, int nid_from)
+{
+ const X509V3_EXT_METHOD *ext;
+ X509V3_EXT_METHOD *tmpext;
+
+ if (!(ext = X509V3_EXT_get_nid(nid_from))) {
+ OPENSSL_PUT_ERROR(X509V3, X509V3_R_EXTENSION_NOT_FOUND);
+ return 0;
+ }
+ if (!
+ (tmpext =
+ (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) {
+ OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ *tmpext = *ext;
+ tmpext->ext_nid = nid_to;
+ tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
+ return X509V3_EXT_add(tmpext);
+}
+
+void X509V3_EXT_cleanup(void)
+{
+ sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);
+ ext_list = NULL;
+}
+
+static void ext_list_free(X509V3_EXT_METHOD *ext)
+{
+ if (ext->ext_flags & X509V3_EXT_DYNAMIC)
+ OPENSSL_free(ext);
+}
+
+/*
+ * Legacy function: we don't need to add standard extensions any more because
+ * they are now kept in ext_dat.h.
+ */
+
+int X509V3_add_standard_extensions(void)
+{
+ return 1;
+}
+
+/* Return an extension internal structure */
+
+void *X509V3_EXT_d2i(X509_EXTENSION *ext)
+{
+ const X509V3_EXT_METHOD *method;
+ const unsigned char *p;
+
+ if (!(method = X509V3_EXT_get(ext)))
+ return NULL;
+ p = ext->value->data;
+ if (method->it)
+ return ASN1_item_d2i(NULL, &p, ext->value->length,
+ ASN1_ITEM_ptr(method->it));
+ return method->d2i(NULL, &p, ext->value->length);
+}
+
+/*
+ * Get critical flag and decoded version of extension from a NID. The "idx"
+ * variable returns the last found extension and can be used to retrieve
+ * multiple extensions of the same NID. However multiple extensions with the
+ * same NID is usually due to a badly encoded certificate so if idx is NULL
+ * we choke if multiple extensions exist. The "crit" variable is set to the
+ * critical value. The return value is the decoded extension or NULL on
+ * error. The actual error can have several different causes, the value of
+ * *crit reflects the cause: >= 0, extension found but not decoded (reflects
+ * critical value). -1 extension not found. -2 extension occurs more than
+ * once.
+ */
+
+void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit,
+ int *idx)
+{
+ int lastpos;
+ size_t i;
+ X509_EXTENSION *ex, *found_ex = NULL;
+ if (!x) {
+ if (idx)
+ *idx = -1;
+ if (crit)
+ *crit = -1;
+ return NULL;
+ }
+ if (idx)
+ lastpos = *idx + 1;
+ else
+ lastpos = 0;
+ if (lastpos < 0)
+ lastpos = 0;
+ for (i = lastpos; i < sk_X509_EXTENSION_num(x); i++) {
+ ex = sk_X509_EXTENSION_value(x, i);
+ if (OBJ_obj2nid(ex->object) == nid) {
+ if (idx) {
+ *idx = i;
+ found_ex = ex;
+ break;
+ } else if (found_ex) {
+ /* Found more than one */
+ if (crit)
+ *crit = -2;
+ return NULL;
+ }
+ found_ex = ex;
+ }
+ }
+ if (found_ex) {
+ /* Found it */
+ if (crit)
+ *crit = X509_EXTENSION_get_critical(found_ex);
+ return X509V3_EXT_d2i(found_ex);
+ }
+
+ /* Extension not found */
+ if (idx)
+ *idx = -1;
+ if (crit)
+ *crit = -1;
+ return NULL;
+}
+
+/*
+ * This function is a general extension append, replace and delete utility.
+ * The precise operation is governed by the 'flags' value. The 'crit' and
+ * 'value' arguments (if relevant) are the extensions internal structure.
+ */
+
+int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,
+ int crit, unsigned long flags)
+{
+ int errcode, extidx = -1;
+ X509_EXTENSION *ext = NULL, *extmp;
+ STACK_OF(X509_EXTENSION) *ret = NULL;
+ unsigned long ext_op = flags & X509V3_ADD_OP_MASK;
+
+ /*
+ * If appending we don't care if it exists, otherwise look for existing
+ * extension.
+ */
+ if (ext_op != X509V3_ADD_APPEND)
+ extidx = X509v3_get_ext_by_NID(*x, nid, -1);
+
+ /* See if extension exists */
+ if (extidx >= 0) {
+ /* If keep existing, nothing to do */
+ if (ext_op == X509V3_ADD_KEEP_EXISTING)
+ return 1;
+ /* If default then its an error */
+ if (ext_op == X509V3_ADD_DEFAULT) {
+ errcode = X509V3_R_EXTENSION_EXISTS;
+ goto err;
+ }
+ /* If delete, just delete it */
+ if (ext_op == X509V3_ADD_DELETE) {
+ if (!sk_X509_EXTENSION_delete(*x, extidx))
+ return -1;
+ return 1;
+ }
+ } else {
+ /*
+ * If replace existing or delete, error since extension must exist
+ */
+ if ((ext_op == X509V3_ADD_REPLACE_EXISTING) ||
+ (ext_op == X509V3_ADD_DELETE)) {
+ errcode = X509V3_R_EXTENSION_NOT_FOUND;
+ goto err;
+ }
+ }
+
+ /*
+ * If we get this far then we have to create an extension: could have
+ * some flags for alternative encoding schemes...
+ */
+
+ ext = X509V3_EXT_i2d(nid, crit, value);
+
+ if (!ext) {
+ OPENSSL_PUT_ERROR(X509V3, X509V3_R_ERROR_CREATING_EXTENSION);
+ return 0;
+ }
+
+ /* If extension exists replace it.. */
+ if (extidx >= 0) {
+ extmp = sk_X509_EXTENSION_value(*x, extidx);
+ X509_EXTENSION_free(extmp);
+ if (!sk_X509_EXTENSION_set(*x, extidx, ext))
+ return -1;
+ return 1;
+ }
+
+ if ((ret = *x) == NULL
+ && (ret = sk_X509_EXTENSION_new_null()) == NULL)
+ goto m_fail;
+ if (!sk_X509_EXTENSION_push(ret, ext))
+ goto m_fail;
+
+ *x = ret;
+ return 1;
+
+ m_fail:
+ if (ret != *x)
+ sk_X509_EXTENSION_free(ret);
+ X509_EXTENSION_free(ext);
+ return -1;
+
+ err:
+ if (!(flags & X509V3_ADD_SILENT))
+ OPENSSL_PUT_ERROR(X509V3, errcode);
+ return 0;
+}
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