--- /dev/null
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2004.
+ */
+/* ====================================================================
+ * Copyright (c) 2004 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). */
+
+#include <string.h>
+
+#include <openssl/buf.h>
+#include <openssl/mem.h>
+#include <openssl/obj.h>
+#include <openssl/stack.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+
+#include "vpm_int.h"
+#include "../internal.h"
+
+
+/* X509_VERIFY_PARAM functions */
+
+#define SET_HOST 0
+#define ADD_HOST 1
+
+static char *str_copy(char *s)
+{
+ return OPENSSL_strdup(s);
+}
+
+static void str_free(char *s)
+{
+ OPENSSL_free(s);
+}
+
+#define string_stack_free(sk) sk_OPENSSL_STRING_pop_free(sk, str_free)
+
+static int int_x509_param_set_hosts(X509_VERIFY_PARAM_ID *id, int mode,
+ const char *name, size_t namelen)
+{
+ char *copy;
+
+ if (name == NULL || namelen == 0) {
+ // Unlike OpenSSL, we reject trying to set or add an empty name.
+ return 0;
+ }
+
+ /*
+ * Refuse names with embedded NUL bytes.
+ * XXX: Do we need to push an error onto the error stack?
+ */
+ if (name && OPENSSL_memchr(name, '\0', namelen))
+ return 0;
+
+ if (mode == SET_HOST && id->hosts) {
+ string_stack_free(id->hosts);
+ id->hosts = NULL;
+ }
+
+ copy = BUF_strndup(name, namelen);
+ if (copy == NULL)
+ return 0;
+
+ if (id->hosts == NULL &&
+ (id->hosts = sk_OPENSSL_STRING_new_null()) == NULL) {
+ OPENSSL_free(copy);
+ return 0;
+ }
+
+ if (!sk_OPENSSL_STRING_push(id->hosts, copy)) {
+ OPENSSL_free(copy);
+ if (sk_OPENSSL_STRING_num(id->hosts) == 0) {
+ sk_OPENSSL_STRING_free(id->hosts);
+ id->hosts = NULL;
+ }
+ return 0;
+ }
+
+ return 1;
+}
+
+static void x509_verify_param_zero(X509_VERIFY_PARAM *param)
+{
+ X509_VERIFY_PARAM_ID *paramid;
+ if (!param)
+ return;
+ param->name = NULL;
+ param->purpose = 0;
+ param->trust = 0;
+ /*
+ * param->inh_flags = X509_VP_FLAG_DEFAULT;
+ */
+ param->inh_flags = 0;
+ param->flags = 0;
+ param->depth = -1;
+ if (param->policies) {
+ sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
+ param->policies = NULL;
+ }
+ paramid = param->id;
+ if (paramid->hosts) {
+ string_stack_free(paramid->hosts);
+ paramid->hosts = NULL;
+ }
+ if (paramid->peername) {
+ OPENSSL_free(paramid->peername);
+ paramid->peername = NULL;
+ }
+ if (paramid->email) {
+ OPENSSL_free(paramid->email);
+ paramid->email = NULL;
+ paramid->emaillen = 0;
+ }
+ if (paramid->ip) {
+ OPENSSL_free(paramid->ip);
+ paramid->ip = NULL;
+ paramid->iplen = 0;
+ }
+ paramid->poison = 0;
+}
+
+X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
+{
+ X509_VERIFY_PARAM *param;
+ X509_VERIFY_PARAM_ID *paramid;
+ param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
+ if (!param)
+ return NULL;
+ paramid = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM_ID));
+ if (!paramid) {
+ OPENSSL_free(param);
+ return NULL;
+ }
+ OPENSSL_memset(param, 0, sizeof(X509_VERIFY_PARAM));
+ OPENSSL_memset(paramid, 0, sizeof(X509_VERIFY_PARAM_ID));
+ param->id = paramid;
+ x509_verify_param_zero(param);
+ return param;
+}
+
+void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
+{
+ if (param == NULL)
+ return;
+ x509_verify_param_zero(param);
+ OPENSSL_free(param->id);
+ OPENSSL_free(param);
+}
+
+/*-
+ * This function determines how parameters are "inherited" from one structure
+ * to another. There are several different ways this can happen.
+ *
+ * 1. If a child structure needs to have its values initialized from a parent
+ * they are simply copied across. For example SSL_CTX copied to SSL.
+ * 2. If the structure should take on values only if they are currently unset.
+ * For example the values in an SSL structure will take appropriate value
+ * for SSL servers or clients but only if the application has not set new
+ * ones.
+ *
+ * The "inh_flags" field determines how this function behaves.
+ *
+ * Normally any values which are set in the default are not copied from the
+ * destination and verify flags are ORed together.
+ *
+ * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
+ * to the destination. Effectively the values in "to" become default values
+ * which will be used only if nothing new is set in "from".
+ *
+ * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
+ * they are set or not. Flags is still Ored though.
+ *
+ * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
+ * of ORed.
+ *
+ * If X509_VP_FLAG_LOCKED is set then no values are copied.
+ *
+ * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
+ * after the next call.
+ */
+
+/* Macro to test if a field should be copied from src to dest */
+
+#define test_x509_verify_param_copy(field, def) \
+ (to_overwrite || \
+ ((src->field != (def)) && (to_default || (dest->field == (def)))))
+
+/* As above but for ID fields */
+
+#define test_x509_verify_param_copy_id(idf, def) \
+ test_x509_verify_param_copy(id->idf, def)
+
+/* Macro to test and copy a field if necessary */
+
+#define x509_verify_param_copy(field, def) \
+ if (test_x509_verify_param_copy(field, def)) \
+ dest->field = src->field
+
+int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest,
+ const X509_VERIFY_PARAM *src)
+{
+ unsigned long inh_flags;
+ int to_default, to_overwrite;
+ X509_VERIFY_PARAM_ID *id;
+ if (!src)
+ return 1;
+ id = src->id;
+ inh_flags = dest->inh_flags | src->inh_flags;
+
+ if (inh_flags & X509_VP_FLAG_ONCE)
+ dest->inh_flags = 0;
+
+ if (inh_flags & X509_VP_FLAG_LOCKED)
+ return 1;
+
+ if (inh_flags & X509_VP_FLAG_DEFAULT)
+ to_default = 1;
+ else
+ to_default = 0;
+
+ if (inh_flags & X509_VP_FLAG_OVERWRITE)
+ to_overwrite = 1;
+ else
+ to_overwrite = 0;
+
+ x509_verify_param_copy(purpose, 0);
+ x509_verify_param_copy(trust, 0);
+ x509_verify_param_copy(depth, -1);
+
+ /* If overwrite or check time not set, copy across */
+
+ if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) {
+ dest->check_time = src->check_time;
+ dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
+ /* Don't need to copy flag: that is done below */
+ }
+
+ if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
+ dest->flags = 0;
+
+ dest->flags |= src->flags;
+
+ if (test_x509_verify_param_copy(policies, NULL)) {
+ if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
+ return 0;
+ }
+
+ /* Copy the host flags if and only if we're copying the host list */
+ if (test_x509_verify_param_copy_id(hosts, NULL)) {
+ if (dest->id->hosts) {
+ string_stack_free(dest->id->hosts);
+ dest->id->hosts = NULL;
+ }
+ if (id->hosts) {
+ dest->id->hosts =
+ sk_OPENSSL_STRING_deep_copy(id->hosts, str_copy, str_free);
+ if (dest->id->hosts == NULL)
+ return 0;
+ dest->id->hostflags = id->hostflags;
+ }
+ }
+
+ if (test_x509_verify_param_copy_id(email, NULL)) {
+ if (!X509_VERIFY_PARAM_set1_email(dest, id->email, id->emaillen))
+ return 0;
+ }
+
+ if (test_x509_verify_param_copy_id(ip, NULL)) {
+ if (!X509_VERIFY_PARAM_set1_ip(dest, id->ip, id->iplen))
+ return 0;
+ }
+
+ dest->id->poison = src->id->poison;
+
+ return 1;
+}
+
+int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
+ const X509_VERIFY_PARAM *from)
+{
+ unsigned long save_flags = to->inh_flags;
+ int ret;
+ to->inh_flags |= X509_VP_FLAG_DEFAULT;
+ ret = X509_VERIFY_PARAM_inherit(to, from);
+ to->inh_flags = save_flags;
+ return ret;
+}
+
+static int int_x509_param_set1(char **pdest, size_t *pdestlen,
+ const char *src, size_t srclen)
+{
+ void *tmp;
+ if (src == NULL || srclen == 0) {
+ // Unlike OpenSSL, we do not allow an empty string to disable previously
+ // configured checks.
+ return 0;
+ }
+
+ tmp = BUF_memdup(src, srclen);
+ if (!tmp) {
+ return 0;
+ }
+
+ if (*pdest)
+ OPENSSL_free(*pdest);
+ *pdest = tmp;
+ if (pdestlen)
+ *pdestlen = srclen;
+ return 1;
+}
+
+int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
+{
+ if (param->name)
+ OPENSSL_free(param->name);
+ param->name = BUF_strdup(name);
+ if (param->name)
+ return 1;
+ return 0;
+}
+
+int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
+{
+ param->flags |= flags;
+ if (flags & X509_V_FLAG_POLICY_MASK)
+ param->flags |= X509_V_FLAG_POLICY_CHECK;
+ return 1;
+}
+
+int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
+ unsigned long flags)
+{
+ param->flags &= ~flags;
+ return 1;
+}
+
+unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
+{
+ return param->flags;
+}
+
+int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
+{
+ return X509_PURPOSE_set(¶m->purpose, purpose);
+}
+
+int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
+{
+ return X509_TRUST_set(¶m->trust, trust);
+}
+
+void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
+{
+ param->depth = depth;
+}
+
+void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
+{
+ param->check_time = t;
+ param->flags |= X509_V_FLAG_USE_CHECK_TIME;
+}
+
+int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
+ ASN1_OBJECT *policy)
+{
+ if (!param->policies) {
+ param->policies = sk_ASN1_OBJECT_new_null();
+ if (!param->policies)
+ return 0;
+ }
+ if (!sk_ASN1_OBJECT_push(param->policies, policy))
+ return 0;
+ return 1;
+}
+
+int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
+ STACK_OF(ASN1_OBJECT) *policies)
+{
+ size_t i;
+ ASN1_OBJECT *oid, *doid;
+ if (!param)
+ return 0;
+ if (param->policies)
+ sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
+
+ if (!policies) {
+ param->policies = NULL;
+ return 1;
+ }
+
+ param->policies = sk_ASN1_OBJECT_new_null();
+ if (!param->policies)
+ return 0;
+
+ for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) {
+ oid = sk_ASN1_OBJECT_value(policies, i);
+ doid = OBJ_dup(oid);
+ if (!doid)
+ return 0;
+ if (!sk_ASN1_OBJECT_push(param->policies, doid)) {
+ ASN1_OBJECT_free(doid);
+ return 0;
+ }
+ }
+ param->flags |= X509_V_FLAG_POLICY_CHECK;
+ return 1;
+}
+
+int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param,
+ const char *name, size_t namelen)
+{
+ if (!int_x509_param_set_hosts(param->id, SET_HOST, name, namelen)) {
+ param->id->poison = 1;
+ return 0;
+ }
+ return 1;
+}
+
+int X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
+ const char *name, size_t namelen)
+{
+ if (!int_x509_param_set_hosts(param->id, ADD_HOST, name, namelen)) {
+ param->id->poison = 1;
+ return 0;
+ }
+ return 1;
+}
+
+void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
+ unsigned int flags)
+{
+ param->id->hostflags = flags;
+}
+
+char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param)
+{
+ return param->id->peername;
+}
+
+int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
+ const char *email, size_t emaillen)
+{
+ if (OPENSSL_memchr(email, '\0', emaillen) != NULL ||
+ !int_x509_param_set1(¶m->id->email, ¶m->id->emaillen,
+ email, emaillen)) {
+ param->id->poison = 1;
+ return 0;
+ }
+
+ return 1;
+}
+
+int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param,
+ const unsigned char *ip, size_t iplen)
+{
+ if ((iplen != 4 && iplen != 16) ||
+ !int_x509_param_set1((char **)¶m->id->ip, ¶m->id->iplen,
+ (char *)ip, iplen)) {
+ param->id->poison = 1;
+ return 0;
+ }
+
+ return 1;
+}
+
+int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc)
+{
+ unsigned char ipout[16];
+ size_t iplen;
+
+ iplen = (size_t)a2i_ipadd(ipout, ipasc);
+ if (iplen == 0)
+ return 0;
+ return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen);
+}
+
+int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
+{
+ return param->depth;
+}
+
+const char *X509_VERIFY_PARAM_get0_name(const X509_VERIFY_PARAM *param)
+{
+ return param->name;
+}
+
+static const X509_VERIFY_PARAM_ID _empty_id =
+ { NULL, 0U, NULL, NULL, 0, NULL, 0, 0 };
+
+#define vpm_empty_id ((X509_VERIFY_PARAM_ID *)&_empty_id)
+
+/*
+ * Default verify parameters: these are used for various applications and can
+ * be overridden by the user specified table. NB: the 'name' field *must* be
+ * in alphabetical order because it will be searched using OBJ_search.
+ */
+
+static const X509_VERIFY_PARAM default_table[] = {
+ {
+ (char *)"default", /* X509 default parameters */
+ 0, /* Check time */
+ 0, /* internal flags */
+ 0, /* flags */
+ 0, /* purpose */
+ 0, /* trust */
+ 100, /* depth */
+ NULL, /* policies */
+ vpm_empty_id},
+ {
+ (char *)"pkcs7", /* S/MIME sign parameters */
+ 0, /* Check time */
+ 0, /* internal flags */
+ 0, /* flags */
+ X509_PURPOSE_SMIME_SIGN, /* purpose */
+ X509_TRUST_EMAIL, /* trust */
+ -1, /* depth */
+ NULL, /* policies */
+ vpm_empty_id},
+ {
+ (char *)"smime_sign", /* S/MIME sign parameters */
+ 0, /* Check time */
+ 0, /* internal flags */
+ 0, /* flags */
+ X509_PURPOSE_SMIME_SIGN, /* purpose */
+ X509_TRUST_EMAIL, /* trust */
+ -1, /* depth */
+ NULL, /* policies */
+ vpm_empty_id},
+ {
+ (char *)"ssl_client", /* SSL/TLS client parameters */
+ 0, /* Check time */
+ 0, /* internal flags */
+ 0, /* flags */
+ X509_PURPOSE_SSL_CLIENT, /* purpose */
+ X509_TRUST_SSL_CLIENT, /* trust */
+ -1, /* depth */
+ NULL, /* policies */
+ vpm_empty_id},
+ {
+ (char *)"ssl_server", /* SSL/TLS server parameters */
+ 0, /* Check time */
+ 0, /* internal flags */
+ 0, /* flags */
+ X509_PURPOSE_SSL_SERVER, /* purpose */
+ X509_TRUST_SSL_SERVER, /* trust */
+ -1, /* depth */
+ NULL, /* policies */
+ vpm_empty_id}
+};
+
+static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
+
+static int param_cmp(const X509_VERIFY_PARAM **a, const X509_VERIFY_PARAM **b)
+{
+ return strcmp((*a)->name, (*b)->name);
+}
+
+int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
+{
+ X509_VERIFY_PARAM *ptmp;
+ if (!param_table) {
+ param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
+ if (!param_table)
+ return 0;
+ } else {
+ size_t idx;
+
+ if (sk_X509_VERIFY_PARAM_find(param_table, &idx, param)) {
+ ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx);
+ X509_VERIFY_PARAM_free(ptmp);
+ (void)sk_X509_VERIFY_PARAM_delete(param_table, idx);
+ }
+ }
+ if (!sk_X509_VERIFY_PARAM_push(param_table, param))
+ return 0;
+ return 1;
+}
+
+int X509_VERIFY_PARAM_get_count(void)
+{
+ int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
+ if (param_table)
+ num += sk_X509_VERIFY_PARAM_num(param_table);
+ return num;
+}
+
+const X509_VERIFY_PARAM *X509_VERIFY_PARAM_get0(int id)
+{
+ int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
+ if (id < num)
+ return default_table + id;
+ return sk_X509_VERIFY_PARAM_value(param_table, id - num);
+}
+
+const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
+{
+ X509_VERIFY_PARAM pm;
+ unsigned i, limit;
+
+ pm.name = (char *)name;
+ if (param_table) {
+ size_t idx;
+ if (sk_X509_VERIFY_PARAM_find(param_table, &idx, &pm))
+ return sk_X509_VERIFY_PARAM_value(param_table, idx);
+ }
+
+ limit = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
+ for (i = 0; i < limit; i++) {
+ if (strcmp(default_table[i].name, name) == 0) {
+ return &default_table[i];
+ }
+ }
+ return NULL;
+}
+
+void X509_VERIFY_PARAM_table_cleanup(void)
+{
+ if (param_table)
+ sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free);
+ param_table = NULL;
+}
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