852 lines
26 KiB
C
852 lines
26 KiB
C
/*
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* Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* Implementation of RFC 3779 section 3.2.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "internal/cryptlib.h"
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#include <openssl/conf.h>
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#include <openssl/asn1.h>
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#include <openssl/asn1t.h>
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#include <openssl/x509v3.h>
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#include <openssl/x509.h>
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#include "internal/x509_int.h"
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#include <openssl/bn.h>
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#include "ext_dat.h"
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#ifndef OPENSSL_NO_RFC3779
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/*
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* OpenSSL ASN.1 template translation of RFC 3779 3.2.3.
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*/
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ASN1_SEQUENCE(ASRange) = {
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ASN1_SIMPLE(ASRange, min, ASN1_INTEGER),
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ASN1_SIMPLE(ASRange, max, ASN1_INTEGER)
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} ASN1_SEQUENCE_END(ASRange)
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ASN1_CHOICE(ASIdOrRange) = {
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ASN1_SIMPLE(ASIdOrRange, u.id, ASN1_INTEGER),
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ASN1_SIMPLE(ASIdOrRange, u.range, ASRange)
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} ASN1_CHOICE_END(ASIdOrRange)
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ASN1_CHOICE(ASIdentifierChoice) = {
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ASN1_SIMPLE(ASIdentifierChoice, u.inherit, ASN1_NULL),
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ASN1_SEQUENCE_OF(ASIdentifierChoice, u.asIdsOrRanges, ASIdOrRange)
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} ASN1_CHOICE_END(ASIdentifierChoice)
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ASN1_SEQUENCE(ASIdentifiers) = {
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ASN1_EXP_OPT(ASIdentifiers, asnum, ASIdentifierChoice, 0),
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ASN1_EXP_OPT(ASIdentifiers, rdi, ASIdentifierChoice, 1)
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} ASN1_SEQUENCE_END(ASIdentifiers)
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IMPLEMENT_ASN1_FUNCTIONS(ASRange)
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IMPLEMENT_ASN1_FUNCTIONS(ASIdOrRange)
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IMPLEMENT_ASN1_FUNCTIONS(ASIdentifierChoice)
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IMPLEMENT_ASN1_FUNCTIONS(ASIdentifiers)
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/*
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* i2r method for an ASIdentifierChoice.
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*/
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static int i2r_ASIdentifierChoice(BIO *out,
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ASIdentifierChoice *choice,
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int indent, const char *msg)
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{
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int i;
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char *s;
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if (choice == NULL)
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return 1;
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BIO_printf(out, "%*s%s:\n", indent, "", msg);
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switch (choice->type) {
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case ASIdentifierChoice_inherit:
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BIO_printf(out, "%*sinherit\n", indent + 2, "");
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break;
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case ASIdentifierChoice_asIdsOrRanges:
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for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges); i++) {
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ASIdOrRange *aor =
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sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
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switch (aor->type) {
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case ASIdOrRange_id:
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if ((s = i2s_ASN1_INTEGER(NULL, aor->u.id)) == NULL)
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return 0;
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BIO_printf(out, "%*s%s\n", indent + 2, "", s);
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OPENSSL_free(s);
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break;
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case ASIdOrRange_range:
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if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->min)) == NULL)
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return 0;
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BIO_printf(out, "%*s%s-", indent + 2, "", s);
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OPENSSL_free(s);
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if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->max)) == NULL)
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return 0;
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BIO_printf(out, "%s\n", s);
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OPENSSL_free(s);
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break;
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default:
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return 0;
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}
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}
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break;
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default:
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return 0;
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}
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return 1;
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}
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/*
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* i2r method for an ASIdentifier extension.
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*/
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static int i2r_ASIdentifiers(const X509V3_EXT_METHOD *method,
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void *ext, BIO *out, int indent)
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{
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ASIdentifiers *asid = ext;
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return (i2r_ASIdentifierChoice(out, asid->asnum, indent,
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"Autonomous System Numbers") &&
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i2r_ASIdentifierChoice(out, asid->rdi, indent,
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"Routing Domain Identifiers"));
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}
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/*
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* Sort comparison function for a sequence of ASIdOrRange elements.
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*/
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static int ASIdOrRange_cmp(const ASIdOrRange *const *a_,
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const ASIdOrRange *const *b_)
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{
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const ASIdOrRange *a = *a_, *b = *b_;
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OPENSSL_assert((a->type == ASIdOrRange_id && a->u.id != NULL) ||
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(a->type == ASIdOrRange_range && a->u.range != NULL &&
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a->u.range->min != NULL && a->u.range->max != NULL));
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OPENSSL_assert((b->type == ASIdOrRange_id && b->u.id != NULL) ||
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(b->type == ASIdOrRange_range && b->u.range != NULL &&
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b->u.range->min != NULL && b->u.range->max != NULL));
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if (a->type == ASIdOrRange_id && b->type == ASIdOrRange_id)
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return ASN1_INTEGER_cmp(a->u.id, b->u.id);
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if (a->type == ASIdOrRange_range && b->type == ASIdOrRange_range) {
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int r = ASN1_INTEGER_cmp(a->u.range->min, b->u.range->min);
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return r != 0 ? r : ASN1_INTEGER_cmp(a->u.range->max,
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b->u.range->max);
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}
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if (a->type == ASIdOrRange_id)
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return ASN1_INTEGER_cmp(a->u.id, b->u.range->min);
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else
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return ASN1_INTEGER_cmp(a->u.range->min, b->u.id);
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}
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/*
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* Add an inherit element.
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*/
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int X509v3_asid_add_inherit(ASIdentifiers *asid, int which)
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{
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ASIdentifierChoice **choice;
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if (asid == NULL)
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return 0;
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switch (which) {
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case V3_ASID_ASNUM:
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choice = &asid->asnum;
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break;
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case V3_ASID_RDI:
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choice = &asid->rdi;
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break;
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default:
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return 0;
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}
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if (*choice == NULL) {
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if ((*choice = ASIdentifierChoice_new()) == NULL)
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return 0;
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OPENSSL_assert((*choice)->u.inherit == NULL);
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if (((*choice)->u.inherit = ASN1_NULL_new()) == NULL)
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return 0;
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(*choice)->type = ASIdentifierChoice_inherit;
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}
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return (*choice)->type == ASIdentifierChoice_inherit;
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}
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/*
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* Add an ID or range to an ASIdentifierChoice.
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*/
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int X509v3_asid_add_id_or_range(ASIdentifiers *asid,
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int which, ASN1_INTEGER *min, ASN1_INTEGER *max)
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{
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ASIdentifierChoice **choice;
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ASIdOrRange *aor;
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if (asid == NULL)
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return 0;
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switch (which) {
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case V3_ASID_ASNUM:
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choice = &asid->asnum;
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break;
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case V3_ASID_RDI:
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choice = &asid->rdi;
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break;
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default:
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return 0;
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}
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if (*choice != NULL && (*choice)->type == ASIdentifierChoice_inherit)
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return 0;
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if (*choice == NULL) {
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if ((*choice = ASIdentifierChoice_new()) == NULL)
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return 0;
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OPENSSL_assert((*choice)->u.asIdsOrRanges == NULL);
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(*choice)->u.asIdsOrRanges = sk_ASIdOrRange_new(ASIdOrRange_cmp);
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if ((*choice)->u.asIdsOrRanges == NULL)
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return 0;
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(*choice)->type = ASIdentifierChoice_asIdsOrRanges;
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}
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if ((aor = ASIdOrRange_new()) == NULL)
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return 0;
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if (max == NULL) {
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aor->type = ASIdOrRange_id;
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aor->u.id = min;
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} else {
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aor->type = ASIdOrRange_range;
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if ((aor->u.range = ASRange_new()) == NULL)
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goto err;
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ASN1_INTEGER_free(aor->u.range->min);
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aor->u.range->min = min;
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ASN1_INTEGER_free(aor->u.range->max);
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aor->u.range->max = max;
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}
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if (!(sk_ASIdOrRange_push((*choice)->u.asIdsOrRanges, aor)))
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goto err;
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return 1;
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err:
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ASIdOrRange_free(aor);
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return 0;
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}
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/*
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* Extract min and max values from an ASIdOrRange.
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*/
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static void extract_min_max(ASIdOrRange *aor,
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ASN1_INTEGER **min, ASN1_INTEGER **max)
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{
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OPENSSL_assert(aor != NULL && min != NULL && max != NULL);
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switch (aor->type) {
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case ASIdOrRange_id:
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*min = aor->u.id;
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*max = aor->u.id;
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return;
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case ASIdOrRange_range:
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*min = aor->u.range->min;
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*max = aor->u.range->max;
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return;
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}
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}
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/*
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* Check whether an ASIdentifierChoice is in canonical form.
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*/
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static int ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice)
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{
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ASN1_INTEGER *a_max_plus_one = NULL;
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BIGNUM *bn = NULL;
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int i, ret = 0;
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/*
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* Empty element or inheritance is canonical.
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*/
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if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
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return 1;
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/*
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* If not a list, or if empty list, it's broken.
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*/
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if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
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sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0)
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return 0;
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/*
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* It's a list, check it.
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*/
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for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
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ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
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ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
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ASN1_INTEGER *a_min = NULL, *a_max = NULL, *b_min = NULL, *b_max =
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NULL;
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extract_min_max(a, &a_min, &a_max);
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extract_min_max(b, &b_min, &b_max);
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/*
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* Punt misordered list, overlapping start, or inverted range.
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*/
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if (ASN1_INTEGER_cmp(a_min, b_min) >= 0 ||
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ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
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ASN1_INTEGER_cmp(b_min, b_max) > 0)
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goto done;
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/*
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* Calculate a_max + 1 to check for adjacency.
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*/
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if ((bn == NULL && (bn = BN_new()) == NULL) ||
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ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
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!BN_add_word(bn, 1) ||
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(a_max_plus_one =
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BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
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X509V3err(X509V3_F_ASIDENTIFIERCHOICE_IS_CANONICAL,
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ERR_R_MALLOC_FAILURE);
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goto done;
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}
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/*
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* Punt if adjacent or overlapping.
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*/
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if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) >= 0)
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goto done;
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}
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/*
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* Check for inverted range.
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*/
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i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
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{
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ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
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ASN1_INTEGER *a_min, *a_max;
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if (a != NULL && a->type == ASIdOrRange_range) {
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extract_min_max(a, &a_min, &a_max);
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if (ASN1_INTEGER_cmp(a_min, a_max) > 0)
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goto done;
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}
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}
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ret = 1;
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done:
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ASN1_INTEGER_free(a_max_plus_one);
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BN_free(bn);
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return ret;
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}
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/*
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* Check whether an ASIdentifier extension is in canonical form.
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*/
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int X509v3_asid_is_canonical(ASIdentifiers *asid)
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{
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return (asid == NULL ||
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(ASIdentifierChoice_is_canonical(asid->asnum) &&
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ASIdentifierChoice_is_canonical(asid->rdi)));
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}
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/*
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* Whack an ASIdentifierChoice into canonical form.
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*/
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static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
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{
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ASN1_INTEGER *a_max_plus_one = NULL;
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BIGNUM *bn = NULL;
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int i, ret = 0;
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/*
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* Nothing to do for empty element or inheritance.
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*/
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if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
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return 1;
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/*
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* If not a list, or if empty list, it's broken.
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*/
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if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
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sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0) {
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X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
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X509V3_R_EXTENSION_VALUE_ERROR);
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return 0;
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}
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/*
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* We have a non-empty list. Sort it.
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*/
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sk_ASIdOrRange_sort(choice->u.asIdsOrRanges);
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/*
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* Now check for errors and suboptimal encoding, rejecting the
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* former and fixing the latter.
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*/
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for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
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ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
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ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
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ASN1_INTEGER *a_min = NULL, *a_max = NULL, *b_min = NULL, *b_max =
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NULL;
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extract_min_max(a, &a_min, &a_max);
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extract_min_max(b, &b_min, &b_max);
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/*
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* Make sure we're properly sorted (paranoia).
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*/
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OPENSSL_assert(ASN1_INTEGER_cmp(a_min, b_min) <= 0);
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/*
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* Punt inverted ranges.
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*/
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if (ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
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ASN1_INTEGER_cmp(b_min, b_max) > 0)
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goto done;
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/*
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* Check for overlaps.
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*/
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if (ASN1_INTEGER_cmp(a_max, b_min) >= 0) {
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X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
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X509V3_R_EXTENSION_VALUE_ERROR);
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goto done;
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}
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/*
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* Calculate a_max + 1 to check for adjacency.
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*/
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if ((bn == NULL && (bn = BN_new()) == NULL) ||
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ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
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!BN_add_word(bn, 1) ||
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(a_max_plus_one =
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BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
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X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
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ERR_R_MALLOC_FAILURE);
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goto done;
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}
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/*
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* If a and b are adjacent, merge them.
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*/
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if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) == 0) {
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ASRange *r;
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switch (a->type) {
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case ASIdOrRange_id:
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if ((r = OPENSSL_malloc(sizeof(*r))) == NULL) {
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X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
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ERR_R_MALLOC_FAILURE);
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goto done;
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}
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r->min = a_min;
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r->max = b_max;
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a->type = ASIdOrRange_range;
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a->u.range = r;
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break;
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case ASIdOrRange_range:
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ASN1_INTEGER_free(a->u.range->max);
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a->u.range->max = b_max;
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break;
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}
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switch (b->type) {
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case ASIdOrRange_id:
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b->u.id = NULL;
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break;
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case ASIdOrRange_range:
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b->u.range->max = NULL;
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break;
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}
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ASIdOrRange_free(b);
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(void)sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1);
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i--;
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continue;
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}
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}
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/*
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* Check for final inverted range.
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*/
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i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
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{
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ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
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ASN1_INTEGER *a_min, *a_max;
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if (a != NULL && a->type == ASIdOrRange_range) {
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extract_min_max(a, &a_min, &a_max);
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if (ASN1_INTEGER_cmp(a_min, a_max) > 0)
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goto done;
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}
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}
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OPENSSL_assert(ASIdentifierChoice_is_canonical(choice)); /* Paranoia */
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ret = 1;
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done:
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ASN1_INTEGER_free(a_max_plus_one);
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BN_free(bn);
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return ret;
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}
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/*
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* Whack an ASIdentifier extension into canonical form.
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*/
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int X509v3_asid_canonize(ASIdentifiers *asid)
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{
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return (asid == NULL ||
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(ASIdentifierChoice_canonize(asid->asnum) &&
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ASIdentifierChoice_canonize(asid->rdi)));
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}
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/*
|
|
* v2i method for an ASIdentifier extension.
|
|
*/
|
|
static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
|
|
struct v3_ext_ctx *ctx,
|
|
STACK_OF(CONF_VALUE) *values)
|
|
{
|
|
ASN1_INTEGER *min = NULL, *max = NULL;
|
|
ASIdentifiers *asid = NULL;
|
|
int i;
|
|
|
|
if ((asid = ASIdentifiers_new()) == NULL) {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
|
|
CONF_VALUE *val = sk_CONF_VALUE_value(values, i);
|
|
int i1 = 0, i2 = 0, i3 = 0, is_range = 0, which = 0;
|
|
|
|
/*
|
|
* Figure out whether this is an AS or an RDI.
|
|
*/
|
|
if (!name_cmp(val->name, "AS")) {
|
|
which = V3_ASID_ASNUM;
|
|
} else if (!name_cmp(val->name, "RDI")) {
|
|
which = V3_ASID_RDI;
|
|
} else {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS,
|
|
X509V3_R_EXTENSION_NAME_ERROR);
|
|
X509V3_conf_err(val);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Handle inheritance.
|
|
*/
|
|
if (strcmp(val->value, "inherit") == 0) {
|
|
if (X509v3_asid_add_inherit(asid, which))
|
|
continue;
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS,
|
|
X509V3_R_INVALID_INHERITANCE);
|
|
X509V3_conf_err(val);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Number, range, or mistake, pick it apart and figure out which.
|
|
*/
|
|
i1 = strspn(val->value, "0123456789");
|
|
if (val->value[i1] == '\0') {
|
|
is_range = 0;
|
|
} else {
|
|
is_range = 1;
|
|
i2 = i1 + strspn(val->value + i1, " \t");
|
|
if (val->value[i2] != '-') {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS,
|
|
X509V3_R_INVALID_ASNUMBER);
|
|
X509V3_conf_err(val);
|
|
goto err;
|
|
}
|
|
i2++;
|
|
i2 = i2 + strspn(val->value + i2, " \t");
|
|
i3 = i2 + strspn(val->value + i2, "0123456789");
|
|
if (val->value[i3] != '\0') {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS,
|
|
X509V3_R_INVALID_ASRANGE);
|
|
X509V3_conf_err(val);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Syntax is ok, read and add it.
|
|
*/
|
|
if (!is_range) {
|
|
if (!X509V3_get_value_int(val, &min)) {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
} else {
|
|
char *s = OPENSSL_strdup(val->value);
|
|
if (s == NULL) {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
s[i1] = '\0';
|
|
min = s2i_ASN1_INTEGER(NULL, s);
|
|
max = s2i_ASN1_INTEGER(NULL, s + i2);
|
|
OPENSSL_free(s);
|
|
if (min == NULL || max == NULL) {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (ASN1_INTEGER_cmp(min, max) > 0) {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS,
|
|
X509V3_R_EXTENSION_VALUE_ERROR);
|
|
goto err;
|
|
}
|
|
}
|
|
if (!X509v3_asid_add_id_or_range(asid, which, min, max)) {
|
|
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
min = max = NULL;
|
|
}
|
|
|
|
/*
|
|
* Canonize the result, then we're done.
|
|
*/
|
|
if (!X509v3_asid_canonize(asid))
|
|
goto err;
|
|
return asid;
|
|
|
|
err:
|
|
ASIdentifiers_free(asid);
|
|
ASN1_INTEGER_free(min);
|
|
ASN1_INTEGER_free(max);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* OpenSSL dispatch.
|
|
*/
|
|
const X509V3_EXT_METHOD v3_asid = {
|
|
NID_sbgp_autonomousSysNum, /* nid */
|
|
0, /* flags */
|
|
ASN1_ITEM_ref(ASIdentifiers), /* template */
|
|
0, 0, 0, 0, /* old functions, ignored */
|
|
0, /* i2s */
|
|
0, /* s2i */
|
|
0, /* i2v */
|
|
v2i_ASIdentifiers, /* v2i */
|
|
i2r_ASIdentifiers, /* i2r */
|
|
0, /* r2i */
|
|
NULL /* extension-specific data */
|
|
};
|
|
|
|
/*
|
|
* Figure out whether extension uses inheritance.
|
|
*/
|
|
int X509v3_asid_inherits(ASIdentifiers *asid)
|
|
{
|
|
return (asid != NULL &&
|
|
((asid->asnum != NULL &&
|
|
asid->asnum->type == ASIdentifierChoice_inherit) ||
|
|
(asid->rdi != NULL &&
|
|
asid->rdi->type == ASIdentifierChoice_inherit)));
|
|
}
|
|
|
|
/*
|
|
* Figure out whether parent contains child.
|
|
*/
|
|
static int asid_contains(ASIdOrRanges *parent, ASIdOrRanges *child)
|
|
{
|
|
ASN1_INTEGER *p_min = NULL, *p_max = NULL, *c_min = NULL, *c_max = NULL;
|
|
int p, c;
|
|
|
|
if (child == NULL || parent == child)
|
|
return 1;
|
|
if (parent == NULL)
|
|
return 0;
|
|
|
|
p = 0;
|
|
for (c = 0; c < sk_ASIdOrRange_num(child); c++) {
|
|
extract_min_max(sk_ASIdOrRange_value(child, c), &c_min, &c_max);
|
|
for (;; p++) {
|
|
if (p >= sk_ASIdOrRange_num(parent))
|
|
return 0;
|
|
extract_min_max(sk_ASIdOrRange_value(parent, p), &p_min, &p_max);
|
|
if (ASN1_INTEGER_cmp(p_max, c_max) < 0)
|
|
continue;
|
|
if (ASN1_INTEGER_cmp(p_min, c_min) > 0)
|
|
return 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Test whether a is a subset of b.
|
|
*/
|
|
int X509v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b)
|
|
{
|
|
return (a == NULL ||
|
|
a == b ||
|
|
(b != NULL &&
|
|
!X509v3_asid_inherits(a) &&
|
|
!X509v3_asid_inherits(b) &&
|
|
asid_contains(b->asnum->u.asIdsOrRanges,
|
|
a->asnum->u.asIdsOrRanges) &&
|
|
asid_contains(b->rdi->u.asIdsOrRanges,
|
|
a->rdi->u.asIdsOrRanges)));
|
|
}
|
|
|
|
/*
|
|
* Validation error handling via callback.
|
|
*/
|
|
#define validation_err(_err_) \
|
|
do { \
|
|
if (ctx != NULL) { \
|
|
ctx->error = _err_; \
|
|
ctx->error_depth = i; \
|
|
ctx->current_cert = x; \
|
|
ret = ctx->verify_cb(0, ctx); \
|
|
} else { \
|
|
ret = 0; \
|
|
} \
|
|
if (!ret) \
|
|
goto done; \
|
|
} while (0)
|
|
|
|
/*
|
|
* Core code for RFC 3779 3.3 path validation.
|
|
*/
|
|
static int asid_validate_path_internal(X509_STORE_CTX *ctx,
|
|
STACK_OF(X509) *chain,
|
|
ASIdentifiers *ext)
|
|
{
|
|
ASIdOrRanges *child_as = NULL, *child_rdi = NULL;
|
|
int i, ret = 1, inherit_as = 0, inherit_rdi = 0;
|
|
X509 *x;
|
|
|
|
OPENSSL_assert(chain != NULL && sk_X509_num(chain) > 0);
|
|
OPENSSL_assert(ctx != NULL || ext != NULL);
|
|
OPENSSL_assert(ctx == NULL || ctx->verify_cb != NULL);
|
|
|
|
/*
|
|
* Figure out where to start. If we don't have an extension to
|
|
* check, we're done. Otherwise, check canonical form and
|
|
* set up for walking up the chain.
|
|
*/
|
|
if (ext != NULL) {
|
|
i = -1;
|
|
x = NULL;
|
|
} else {
|
|
i = 0;
|
|
x = sk_X509_value(chain, i);
|
|
OPENSSL_assert(x != NULL);
|
|
if ((ext = x->rfc3779_asid) == NULL)
|
|
goto done;
|
|
}
|
|
if (!X509v3_asid_is_canonical(ext))
|
|
validation_err(X509_V_ERR_INVALID_EXTENSION);
|
|
if (ext->asnum != NULL) {
|
|
switch (ext->asnum->type) {
|
|
case ASIdentifierChoice_inherit:
|
|
inherit_as = 1;
|
|
break;
|
|
case ASIdentifierChoice_asIdsOrRanges:
|
|
child_as = ext->asnum->u.asIdsOrRanges;
|
|
break;
|
|
}
|
|
}
|
|
if (ext->rdi != NULL) {
|
|
switch (ext->rdi->type) {
|
|
case ASIdentifierChoice_inherit:
|
|
inherit_rdi = 1;
|
|
break;
|
|
case ASIdentifierChoice_asIdsOrRanges:
|
|
child_rdi = ext->rdi->u.asIdsOrRanges;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now walk up the chain. Extensions must be in canonical form, no
|
|
* cert may list resources that its parent doesn't list.
|
|
*/
|
|
for (i++; i < sk_X509_num(chain); i++) {
|
|
x = sk_X509_value(chain, i);
|
|
OPENSSL_assert(x != NULL);
|
|
if (x->rfc3779_asid == NULL) {
|
|
if (child_as != NULL || child_rdi != NULL)
|
|
validation_err(X509_V_ERR_UNNESTED_RESOURCE);
|
|
continue;
|
|
}
|
|
if (!X509v3_asid_is_canonical(x->rfc3779_asid))
|
|
validation_err(X509_V_ERR_INVALID_EXTENSION);
|
|
if (x->rfc3779_asid->asnum == NULL && child_as != NULL) {
|
|
validation_err(X509_V_ERR_UNNESTED_RESOURCE);
|
|
child_as = NULL;
|
|
inherit_as = 0;
|
|
}
|
|
if (x->rfc3779_asid->asnum != NULL &&
|
|
x->rfc3779_asid->asnum->type ==
|
|
ASIdentifierChoice_asIdsOrRanges) {
|
|
if (inherit_as
|
|
|| asid_contains(x->rfc3779_asid->asnum->u.asIdsOrRanges,
|
|
child_as)) {
|
|
child_as = x->rfc3779_asid->asnum->u.asIdsOrRanges;
|
|
inherit_as = 0;
|
|
} else {
|
|
validation_err(X509_V_ERR_UNNESTED_RESOURCE);
|
|
}
|
|
}
|
|
if (x->rfc3779_asid->rdi == NULL && child_rdi != NULL) {
|
|
validation_err(X509_V_ERR_UNNESTED_RESOURCE);
|
|
child_rdi = NULL;
|
|
inherit_rdi = 0;
|
|
}
|
|
if (x->rfc3779_asid->rdi != NULL &&
|
|
x->rfc3779_asid->rdi->type == ASIdentifierChoice_asIdsOrRanges) {
|
|
if (inherit_rdi ||
|
|
asid_contains(x->rfc3779_asid->rdi->u.asIdsOrRanges,
|
|
child_rdi)) {
|
|
child_rdi = x->rfc3779_asid->rdi->u.asIdsOrRanges;
|
|
inherit_rdi = 0;
|
|
} else {
|
|
validation_err(X509_V_ERR_UNNESTED_RESOURCE);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Trust anchor can't inherit.
|
|
*/
|
|
OPENSSL_assert(x != NULL);
|
|
if (x->rfc3779_asid != NULL) {
|
|
if (x->rfc3779_asid->asnum != NULL &&
|
|
x->rfc3779_asid->asnum->type == ASIdentifierChoice_inherit)
|
|
validation_err(X509_V_ERR_UNNESTED_RESOURCE);
|
|
if (x->rfc3779_asid->rdi != NULL &&
|
|
x->rfc3779_asid->rdi->type == ASIdentifierChoice_inherit)
|
|
validation_err(X509_V_ERR_UNNESTED_RESOURCE);
|
|
}
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
#undef validation_err
|
|
|
|
/*
|
|
* RFC 3779 3.3 path validation -- called from X509_verify_cert().
|
|
*/
|
|
int X509v3_asid_validate_path(X509_STORE_CTX *ctx)
|
|
{
|
|
return asid_validate_path_internal(ctx, ctx->chain, NULL);
|
|
}
|
|
|
|
/*
|
|
* RFC 3779 3.3 path validation of an extension.
|
|
* Test whether chain covers extension.
|
|
*/
|
|
int X509v3_asid_validate_resource_set(STACK_OF(X509) *chain,
|
|
ASIdentifiers *ext, int allow_inheritance)
|
|
{
|
|
if (ext == NULL)
|
|
return 1;
|
|
if (chain == NULL || sk_X509_num(chain) == 0)
|
|
return 0;
|
|
if (!allow_inheritance && X509v3_asid_inherits(ext))
|
|
return 0;
|
|
return asid_validate_path_internal(NULL, chain, ext);
|
|
}
|
|
|
|
#endif /* OPENSSL_NO_RFC3779 */
|