-/* x509_trs.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 1999.
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
*/
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/x509v3.h>
+#include "internal/x509_int.h"
-
-static int tr_cmp(X509_TRUST **a, X509_TRUST **b);
+static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b);
static void trtable_free(X509_TRUST *p);
static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags);
-static int trust_any(X509_TRUST *trust, X509 *x, int flags);
+static int trust_1oid(X509_TRUST *trust, X509 *x, int flags);
+static int trust_compat(X509_TRUST *trust, X509 *x, int flags);
static int obj_trust(int id, X509 *x, int flags);
-static int (*default_trust)(int id, X509 *x, int flags) = obj_trust;
+static int (*default_trust) (int id, X509 *x, int flags) = obj_trust;
-/* WARNING: the following table should be kept in order of trust
- * and without any gaps so we can just subtract the minimum trust
- * value to get an index into the table
+/*
+ * WARNING: the following table should be kept in order of trust and without
+ * any gaps so we can just subtract the minimum trust value to get an index
+ * into the table
*/
static X509_TRUST trstandard[] = {
-{X509_TRUST_ANY, 0, trust_any, "Any", 0, NULL},
-{X509_TRUST_SSL_CLIENT, 0, trust_1oidany, "SSL Client", NID_client_auth, NULL},
-{X509_TRUST_SSL_SERVER, 0, trust_1oidany, "SSL Client", NID_server_auth, NULL},
-{X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect, NULL},
+ {X509_TRUST_COMPAT, 0, trust_compat, "compatible", 0, NULL},
+ {X509_TRUST_SSL_CLIENT, 0, trust_1oidany, "SSL Client", NID_client_auth,
+ NULL},
+ {X509_TRUST_SSL_SERVER, 0, trust_1oidany, "SSL Server", NID_server_auth,
+ NULL},
+ {X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect,
+ NULL},
+ {X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, "Object Signer", NID_code_sign,
+ NULL},
+ {X509_TRUST_OCSP_SIGN, 0, trust_1oid, "OCSP responder", NID_OCSP_sign,
+ NULL},
+ {X509_TRUST_OCSP_REQUEST, 0, trust_1oid, "OCSP request", NID_ad_OCSP,
+ NULL},
+ {X509_TRUST_TSA, 0, trust_1oidany, "TSA server", NID_time_stamp, NULL}
};
-#define X509_TRUST_COUNT (sizeof(trstandard)/sizeof(X509_TRUST))
-
-IMPLEMENT_STACK_OF(X509_TRUST)
+#define X509_TRUST_COUNT OSSL_NELEM(trstandard)
static STACK_OF(X509_TRUST) *trtable = NULL;
-static int tr_cmp(X509_TRUST **a, X509_TRUST **b)
+static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b)
{
- return (*a)->trust - (*b)->trust;
+ return (*a)->trust - (*b)->trust;
}
-int (*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int)
-{
-int (*oldtrust)(int , X509 *, int);
-oldtrust = default_trust;
-default_trust = trust;
-return oldtrust;
+int (*X509_TRUST_set_default(int (*trust) (int, X509 *, int))) (int, X509 *,
+ int) {
+ int (*oldtrust) (int, X509 *, int);
+ oldtrust = default_trust;
+ default_trust = trust;
+ return oldtrust;
}
-
int X509_check_trust(X509 *x, int id, int flags)
{
- X509_TRUST *pt;
- int idx;
- if(id == -1) return 1;
- if(!(idx = X509_TRUST_get_by_id(id)))
- return default_trust(id, x, flags);
- pt = X509_TRUST_iget(idx);
- return pt->check_trust(pt, x, flags);
+ X509_TRUST *pt;
+ int idx;
+
+ /* We get this as a default value */
+ if (id == 0) {
+ int rv;
+ rv = obj_trust(NID_anyExtendedKeyUsage, x, 0);
+ if (rv != X509_TRUST_UNTRUSTED)
+ return rv;
+ return trust_compat(NULL, x, 0);
+ }
+ idx = X509_TRUST_get_by_id(id);
+ if (idx == -1)
+ return default_trust(id, x, flags);
+ pt = X509_TRUST_get0(idx);
+ return pt->check_trust(pt, x, flags);
}
int X509_TRUST_get_count(void)
{
- if(!trtable) return X509_TRUST_COUNT;
- return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
+ if (!trtable)
+ return X509_TRUST_COUNT;
+ return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
}
-X509_TRUST * X509_TRUST_iget(int idx)
+X509_TRUST *X509_TRUST_get0(int idx)
{
- if(idx < 0) return NULL;
- if(idx < X509_TRUST_COUNT) return trstandard + idx;
- return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
+ if (idx < 0)
+ return NULL;
+ if (idx < (int)X509_TRUST_COUNT)
+ return trstandard + idx;
+ return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
}
int X509_TRUST_get_by_id(int id)
{
- X509_TRUST tmp;
- int idx;
- if((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
- return id - X509_TRUST_MIN;
- tmp.trust = id;
- if(!trtable) return -1;
- idx = sk_X509_TRUST_find(trtable, &tmp);
- if(idx == -1) return -1;
- return idx + X509_TRUST_COUNT;
+ X509_TRUST tmp;
+ int idx;
+ if ((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
+ return id - X509_TRUST_MIN;
+ tmp.trust = id;
+ if (!trtable)
+ return -1;
+ idx = sk_X509_TRUST_find(trtable, &tmp);
+ if (idx == -1)
+ return -1;
+ return idx + X509_TRUST_COUNT;
+}
+
+int X509_TRUST_set(int *t, int trust)
+{
+ if (X509_TRUST_get_by_id(trust) == -1) {
+ X509err(X509_F_X509_TRUST_SET, X509_R_INVALID_TRUST);
+ return 0;
+ }
+ *t = trust;
+ return 1;
}
-int X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int),
- char *name, int arg1, void *arg2)
+int X509_TRUST_add(int id, int flags, int (*ck) (X509_TRUST *, X509 *, int),
+ char *name, int arg1, void *arg2)
{
- int idx;
- X509_TRUST *trtmp;
- /* This is set according to what we change: application can't set it */
- flags &= ~X509_TRUST_DYNAMIC;
- /* This will always be set for application modified trust entries */
- flags |= X509_TRUST_DYNAMIC_NAME;
- /* Get existing entry if any */
- idx = X509_TRUST_get_by_id(id);
- /* Need a new entry */
- if(idx == -1) {
- if(!(trtmp = Malloc(sizeof(X509_TRUST)))) {
- X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- trtmp->flags = X509_TRUST_DYNAMIC;
- } else trtmp = X509_TRUST_iget(idx);
+ int idx;
+ X509_TRUST *trtmp;
+ /*
+ * This is set according to what we change: application can't set it
+ */
+ flags &= ~X509_TRUST_DYNAMIC;
+ /* This will always be set for application modified trust entries */
+ flags |= X509_TRUST_DYNAMIC_NAME;
+ /* Get existing entry if any */
+ idx = X509_TRUST_get_by_id(id);
+ /* Need a new entry */
+ if (idx == -1) {
+ if ((trtmp = OPENSSL_malloc(sizeof(*trtmp))) == NULL) {
+ X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ trtmp->flags = X509_TRUST_DYNAMIC;
+ } else
+ trtmp = X509_TRUST_get0(idx);
- /* Free existing name if dynamic */
- if(trtmp->flags & X509_TRUST_DYNAMIC_NAME) Free(trtmp->name);
- /* dup supplied name */
- if(!(trtmp->name = BUF_strdup(name))) {
- X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- /* Keep the dynamic flag of existing entry */
- trtmp->flags &= X509_TRUST_DYNAMIC;
- /* Set all other flags */
- trtmp->flags |= flags;
+ /* OPENSSL_free existing name if dynamic */
+ if (trtmp->flags & X509_TRUST_DYNAMIC_NAME)
+ OPENSSL_free(trtmp->name);
+ /* dup supplied name */
+ if ((trtmp->name = OPENSSL_strdup(name)) == NULL) {
+ X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ /* Keep the dynamic flag of existing entry */
+ trtmp->flags &= X509_TRUST_DYNAMIC;
+ /* Set all other flags */
+ trtmp->flags |= flags;
- trtmp->trust = id;
- trtmp->check_trust = ck;
- trtmp->arg1 = arg1;
- trtmp->arg2 = arg2;
+ trtmp->trust = id;
+ trtmp->check_trust = ck;
+ trtmp->arg1 = arg1;
+ trtmp->arg2 = arg2;
- /* If its a new entry manage the dynamic table */
- if(idx == -1) {
- if(!trtable && !(trtable = sk_X509_TRUST_new(tr_cmp))) {
- X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- if (!sk_X509_TRUST_push(trtable, trtmp)) {
- X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
- return 1;
+ /* If its a new entry manage the dynamic table */
+ if (idx == -1) {
+ if (trtable == NULL
+ && (trtable = sk_X509_TRUST_new(tr_cmp)) == NULL) {
+ X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ if (!sk_X509_TRUST_push(trtable, trtmp)) {
+ X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ }
+ return 1;
}
static void trtable_free(X509_TRUST *p)
- {
- if(!p) return;
- if (p->flags & X509_TRUST_DYNAMIC)
- {
- if (p->flags & X509_TRUST_DYNAMIC_NAME)
- Free(p->name);
- Free(p);
- }
- }
+{
+ if (!p)
+ return;
+ if (p->flags & X509_TRUST_DYNAMIC) {
+ if (p->flags & X509_TRUST_DYNAMIC_NAME)
+ OPENSSL_free(p->name);
+ OPENSSL_free(p);
+ }
+}
void X509_TRUST_cleanup(void)
{
- int i;
- for(i = 0; i < X509_TRUST_COUNT; i++) trtable_free(trstandard + i);
- sk_X509_TRUST_pop_free(trtable, trtable_free);
- trtable = NULL;
+ unsigned int i;
+ for (i = 0; i < X509_TRUST_COUNT; i++)
+ trtable_free(trstandard + i);
+ sk_X509_TRUST_pop_free(trtable, trtable_free);
+ trtable = NULL;
}
int X509_TRUST_get_flags(X509_TRUST *xp)
{
- return xp->flags;
+ return xp->flags;
}
-char *X509_TRUST_iget_name(X509_TRUST *xp)
+char *X509_TRUST_get0_name(X509_TRUST *xp)
{
- return xp->name;
+ return xp->name;
}
int X509_TRUST_get_trust(X509_TRUST *xp)
{
- return xp->trust;
+ return xp->trust;
}
static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
{
- if(x->aux) return obj_trust(trust->arg1, x, flags);
- /* we don't have any trust settings: for compatibility
- * we return trusted if it is self signed
- */
- X509_check_purpose(x, -1, 0);
- if(x->ex_flags & EXFLAG_SS) return X509_TRUST_TRUSTED;
- else return X509_TRUST_UNTRUSTED;
+ if (x->aux && (x->aux->trust || x->aux->reject))
+ return obj_trust(trust->arg1, x, flags);
+ /*
+ * we don't have any trust settings: for compatibility we return trusted
+ * if it is self signed
+ */
+ return trust_compat(trust, x, flags);
}
-static int obj_trust(int id, X509 *x, int flags)
+static int trust_1oid(X509_TRUST *trust, X509 *x, int flags)
{
- ASN1_OBJECT *obj;
- int i;
- X509_CERT_AUX *ax;
- ax = x->aux;
- if(!ax) return X509_TRUST_UNTRUSTED;
- if(ax->reject) {
- for(i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
- obj = sk_ASN1_OBJECT_value(ax->reject, i);
- if(OBJ_obj2nid(obj) == id) return X509_TRUST_REJECTED;
- }
- }
- if(ax->trust) {
- for(i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
- obj = sk_ASN1_OBJECT_value(ax->trust, i);
- if(OBJ_obj2nid(obj) == id) return X509_TRUST_TRUSTED;
- }
- }
- return X509_TRUST_UNTRUSTED;
+ if (x->aux)
+ return obj_trust(trust->arg1, x, flags);
+ return X509_TRUST_UNTRUSTED;
}
-static int trust_any(X509_TRUST *trust, X509 *x, int flags)
+static int trust_compat(X509_TRUST *trust, X509 *x, int flags)
+{
+ /* Call for side-effect of computing hash and caching extensions */
+ X509_check_purpose(x, -1, 0);
+ if (x->ex_flags & EXFLAG_SS)
+ return X509_TRUST_TRUSTED;
+ else
+ return X509_TRUST_UNTRUSTED;
+}
+
+static int obj_trust(int id, X509 *x, int flags)
{
- return X509_TRUST_TRUSTED;
+ ASN1_OBJECT *obj;
+ int i;
+ X509_CERT_AUX *ax;
+ ax = x->aux;
+ if (!ax)
+ return X509_TRUST_UNTRUSTED;
+ if (ax->reject) {
+ for (i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
+ obj = sk_ASN1_OBJECT_value(ax->reject, i);
+ if (OBJ_obj2nid(obj) == id)
+ return X509_TRUST_REJECTED;
+ }
+ }
+ if (ax->trust) {
+ for (i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
+ obj = sk_ASN1_OBJECT_value(ax->trust, i);
+ if (OBJ_obj2nid(obj) == id)
+ return X509_TRUST_TRUSTED;
+ }
+ /*
+ * Reject when explicit trust EKU are set and none match.
+ *
+ * Returning untrusted is enough for for full chains that end in
+ * self-signed roots, because when explicit trust is specified it
+ * suppresses the default blanket trust of self-signed objects.
+ *
+ * But for partial chains, this is not enough, because absent a similar
+ * trust-self-signed policy, non matching EKUs are indistinguishable
+ * from lack of EKU constraints.
+ *
+ * Therefore, failure to match any trusted purpose must trigger an
+ * explicit reject.
+ */
+ return X509_TRUST_REJECTED;
+ }
+ return X509_TRUST_UNTRUSTED;
}
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