pineapple/externals/libressl/crypto/x509/x509_asid.c
2022-04-24 22:29:35 +02:00

1145 lines
27 KiB
C
Executable file

/* $OpenBSD: x509_asid.c,v 1.30 2021/12/25 15:46:05 tb Exp $ */
/*
* Contributed to the OpenSSL Project by the American Registry for
* Internet Numbers ("ARIN").
*/
/* ====================================================================
* Copyright (c) 2006-2018 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).
*/
/*
* Implementation of RFC 3779 section 3.2.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/bn.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "x509_lcl.h"
#ifndef OPENSSL_NO_RFC3779
static const ASN1_TEMPLATE ASRange_seq_tt[] = {
{
.flags = 0,
.tag = 0,
.offset = offsetof(ASRange, min),
.field_name = "min",
.item = &ASN1_INTEGER_it,
},
{
.flags = 0,
.tag = 0,
.offset = offsetof(ASRange, max),
.field_name = "max",
.item = &ASN1_INTEGER_it,
},
};
const ASN1_ITEM ASRange_it = {
.itype = ASN1_ITYPE_SEQUENCE,
.utype = V_ASN1_SEQUENCE,
.templates = ASRange_seq_tt,
.tcount = sizeof(ASRange_seq_tt) / sizeof(ASN1_TEMPLATE),
.funcs = NULL,
.size = sizeof(ASRange),
.sname = "ASRange",
};
static const ASN1_TEMPLATE ASIdOrRange_ch_tt[] = {
{
.flags = 0,
.tag = 0,
.offset = offsetof(ASIdOrRange, u.id),
.field_name = "u.id",
.item = &ASN1_INTEGER_it,
},
{
.flags = 0,
.tag = 0,
.offset = offsetof(ASIdOrRange, u.range),
.field_name = "u.range",
.item = &ASRange_it,
},
};
const ASN1_ITEM ASIdOrRange_it = {
.itype = ASN1_ITYPE_CHOICE,
.utype = offsetof(ASIdOrRange, type),
.templates = ASIdOrRange_ch_tt,
.tcount = sizeof(ASIdOrRange_ch_tt) / sizeof(ASN1_TEMPLATE),
.funcs = NULL,
.size = sizeof(ASIdOrRange),
.sname = "ASIdOrRange",
};
static const ASN1_TEMPLATE ASIdentifierChoice_ch_tt[] = {
{
.flags = 0,
.tag = 0,
.offset = offsetof(ASIdentifierChoice, u.inherit),
.field_name = "u.inherit",
.item = &ASN1_NULL_it,
},
{
.flags = ASN1_TFLG_SEQUENCE_OF,
.tag = 0,
.offset = offsetof(ASIdentifierChoice, u.asIdsOrRanges),
.field_name = "u.asIdsOrRanges",
.item = &ASIdOrRange_it,
},
};
const ASN1_ITEM ASIdentifierChoice_it = {
.itype = ASN1_ITYPE_CHOICE,
.utype = offsetof(ASIdentifierChoice, type),
.templates = ASIdentifierChoice_ch_tt,
.tcount = sizeof(ASIdentifierChoice_ch_tt) / sizeof(ASN1_TEMPLATE),
.funcs = NULL,
.size = sizeof(ASIdentifierChoice),
.sname = "ASIdentifierChoice",
};
static const ASN1_TEMPLATE ASIdentifiers_seq_tt[] = {
{
.flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,
.tag = 0,
.offset = offsetof(ASIdentifiers, asnum),
.field_name = "asnum",
.item = &ASIdentifierChoice_it,
},
{
.flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,
.tag = 1,
.offset = offsetof(ASIdentifiers, rdi),
.field_name = "rdi",
.item = &ASIdentifierChoice_it,
},
};
const ASN1_ITEM ASIdentifiers_it = {
.itype = ASN1_ITYPE_SEQUENCE,
.utype = V_ASN1_SEQUENCE,
.templates = ASIdentifiers_seq_tt,
.tcount = sizeof(ASIdentifiers_seq_tt) / sizeof(ASN1_TEMPLATE),
.funcs = NULL,
.size = sizeof(ASIdentifiers),
.sname = "ASIdentifiers",
};
ASRange *
d2i_ASRange(ASRange **a, const unsigned char **in, long len)
{
return (ASRange *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&ASRange_it);
}
int
i2d_ASRange(ASRange *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &ASRange_it);
}
ASRange *
ASRange_new(void)
{
return (ASRange *)ASN1_item_new(&ASRange_it);
}
void
ASRange_free(ASRange *a)
{
ASN1_item_free((ASN1_VALUE *)a, &ASRange_it);
}
ASIdOrRange *
d2i_ASIdOrRange(ASIdOrRange **a, const unsigned char **in, long len)
{
return (ASIdOrRange *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&ASIdOrRange_it);
}
int
i2d_ASIdOrRange(ASIdOrRange *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &ASIdOrRange_it);
}
ASIdOrRange *
ASIdOrRange_new(void)
{
return (ASIdOrRange *)ASN1_item_new(&ASIdOrRange_it);
}
void
ASIdOrRange_free(ASIdOrRange *a)
{
ASN1_item_free((ASN1_VALUE *)a, &ASIdOrRange_it);
}
ASIdentifierChoice *
d2i_ASIdentifierChoice(ASIdentifierChoice **a, const unsigned char **in,
long len)
{
return (ASIdentifierChoice *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&ASIdentifierChoice_it);
}
int
i2d_ASIdentifierChoice(ASIdentifierChoice *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &ASIdentifierChoice_it);
}
ASIdentifierChoice *
ASIdentifierChoice_new(void)
{
return (ASIdentifierChoice *)ASN1_item_new(&ASIdentifierChoice_it);
}
void
ASIdentifierChoice_free(ASIdentifierChoice *a)
{
ASN1_item_free((ASN1_VALUE *)a, &ASIdentifierChoice_it);
}
ASIdentifiers *
d2i_ASIdentifiers(ASIdentifiers **a, const unsigned char **in, long len)
{
return (ASIdentifiers *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&ASIdentifiers_it);
}
int
i2d_ASIdentifiers(ASIdentifiers *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &ASIdentifiers_it);
}
ASIdentifiers *
ASIdentifiers_new(void)
{
return (ASIdentifiers *)ASN1_item_new(&ASIdentifiers_it);
}
void
ASIdentifiers_free(ASIdentifiers *a)
{
ASN1_item_free((ASN1_VALUE *)a, &ASIdentifiers_it);
}
/*
* i2r method for an ASIdentifierChoice.
*/
static int
i2r_ASIdentifierChoice(BIO *out, ASIdentifierChoice *choice, int indent,
const char *msg)
{
int i;
char *s;
if (choice == NULL)
return 1;
BIO_printf(out, "%*s%s:\n", indent, "", msg);
switch (choice->type) {
case ASIdentifierChoice_inherit:
BIO_printf(out, "%*sinherit\n", indent + 2, "");
break;
case ASIdentifierChoice_asIdsOrRanges:
for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges);
i++) {
ASIdOrRange *aor =
sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
switch (aor->type) {
case ASIdOrRange_id:
if ((s = i2s_ASN1_INTEGER(NULL, aor->u.id)) ==
NULL)
return 0;
BIO_printf(out, "%*s%s\n", indent + 2, "", s);
free(s);
break;
case ASIdOrRange_range:
if ((s = i2s_ASN1_INTEGER(NULL,
aor->u.range->min)) == NULL)
return 0;
BIO_printf(out, "%*s%s-", indent + 2, "", s);
free(s);
if ((s = i2s_ASN1_INTEGER(NULL,
aor->u.range->max)) == NULL)
return 0;
BIO_printf(out, "%s\n", s);
free(s);
break;
default:
return 0;
}
}
break;
default:
return 0;
}
return 1;
}
/*
* i2r method for an ASIdentifier extension.
*/
static int
i2r_ASIdentifiers(const X509V3_EXT_METHOD *method, void *ext, BIO *out,
int indent)
{
ASIdentifiers *asid = ext;
return (i2r_ASIdentifierChoice(out, asid->asnum, indent,
"Autonomous System Numbers") &&
i2r_ASIdentifierChoice(out, asid->rdi, indent,
"Routing Domain Identifiers"));
}
/*
* Sort comparison function for a sequence of ASIdOrRange elements.
*/
static int
ASIdOrRange_cmp(const ASIdOrRange *const *a_, const ASIdOrRange *const *b_)
{
const ASIdOrRange *a = *a_, *b = *b_;
/* XXX: these asserts need to be replaced */
OPENSSL_assert((a->type == ASIdOrRange_id && a->u.id != NULL) ||
(a->type == ASIdOrRange_range && a->u.range != NULL &&
a->u.range->min != NULL && a->u.range->max != NULL));
OPENSSL_assert((b->type == ASIdOrRange_id && b->u.id != NULL) ||
(b->type == ASIdOrRange_range && b->u.range != NULL &&
b->u.range->min != NULL && b->u.range->max != NULL));
if (a->type == ASIdOrRange_id && b->type == ASIdOrRange_id)
return ASN1_INTEGER_cmp(a->u.id, b->u.id);
if (a->type == ASIdOrRange_range && b->type == ASIdOrRange_range) {
int r = ASN1_INTEGER_cmp(a->u.range->min, b->u.range->min);
return r != 0 ? r : ASN1_INTEGER_cmp(a->u.range->max,
b->u.range->max);
}
if (a->type == ASIdOrRange_id)
return ASN1_INTEGER_cmp(a->u.id, b->u.range->min);
else
return ASN1_INTEGER_cmp(a->u.range->min, b->u.id);
}
/*
* Add an inherit element.
*/
int
X509v3_asid_add_inherit(ASIdentifiers *asid, int which)
{
ASIdentifierChoice **choice;
if (asid == NULL)
return 0;
switch (which) {
case V3_ASID_ASNUM:
choice = &asid->asnum;
break;
case V3_ASID_RDI:
choice = &asid->rdi;
break;
default:
return 0;
}
if (*choice == NULL) {
if ((*choice = ASIdentifierChoice_new()) == NULL)
return 0;
if (((*choice)->u.inherit = ASN1_NULL_new()) == NULL)
return 0;
(*choice)->type = ASIdentifierChoice_inherit;
}
return (*choice)->type == ASIdentifierChoice_inherit;
}
/*
* Add an ID or range to an ASIdentifierChoice.
*/
int
X509v3_asid_add_id_or_range(ASIdentifiers *asid, int which, ASN1_INTEGER *min,
ASN1_INTEGER *max)
{
ASIdentifierChoice **choice;
ASIdOrRange *aor;
if (asid == NULL)
return 0;
switch (which) {
case V3_ASID_ASNUM:
choice = &asid->asnum;
break;
case V3_ASID_RDI:
choice = &asid->rdi;
break;
default:
return 0;
}
if (*choice != NULL && (*choice)->type == ASIdentifierChoice_inherit)
return 0;
if (*choice == NULL) {
if ((*choice = ASIdentifierChoice_new()) == NULL)
return 0;
(*choice)->u.asIdsOrRanges = sk_ASIdOrRange_new(ASIdOrRange_cmp);
if ((*choice)->u.asIdsOrRanges == NULL)
return 0;
(*choice)->type = ASIdentifierChoice_asIdsOrRanges;
}
if ((aor = ASIdOrRange_new()) == NULL)
return 0;
if (max == NULL) {
aor->type = ASIdOrRange_id;
aor->u.id = min;
} else {
aor->type = ASIdOrRange_range;
if ((aor->u.range = ASRange_new()) == NULL)
goto err;
ASN1_INTEGER_free(aor->u.range->min);
aor->u.range->min = min;
ASN1_INTEGER_free(aor->u.range->max);
aor->u.range->max = max;
}
if (!(sk_ASIdOrRange_push((*choice)->u.asIdsOrRanges, aor)))
goto err;
return 1;
err:
ASIdOrRange_free(aor);
return 0;
}
/*
* Extract min and max values from an ASIdOrRange.
*/
static int
extract_min_max(ASIdOrRange *aor, ASN1_INTEGER **min, ASN1_INTEGER **max)
{
switch (aor->type) {
case ASIdOrRange_id:
*min = aor->u.id;
*max = aor->u.id;
return 1;
case ASIdOrRange_range:
*min = aor->u.range->min;
*max = aor->u.range->max;
return 1;
}
return 0;
}
/*
* Check whether an ASIdentifierChoice is in canonical form.
*/
static int
ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice)
{
ASN1_INTEGER *a_max_plus_one = NULL;
ASN1_INTEGER *orig;
BIGNUM *bn = NULL;
int i, ret = 0;
/*
* Empty element or inheritance is canonical.
*/
if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
return 1;
/*
* If not a list, or if empty list, it's broken.
*/
if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0)
return 0;
/*
* It's a list, check it.
*/
for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges,
i);
ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges,
i + 1);
ASN1_INTEGER *a_min = NULL,
*a_max = NULL,
*b_min = NULL,
*b_max =
NULL;
if (!extract_min_max(a, &a_min, &a_max) ||
!extract_min_max(b, &b_min, &b_max))
goto done;
/*
* Punt misordered list, overlapping start, or inverted range.
*/
if (ASN1_INTEGER_cmp(a_min, b_min) >= 0 ||
ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
ASN1_INTEGER_cmp(b_min, b_max) > 0)
goto done;
/*
* Calculate a_max + 1 to check for adjacency.
*/
if ((bn == NULL && (bn = BN_new()) == NULL) ||
ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
!BN_add_word(bn, 1)) {
X509V3error(ERR_R_MALLOC_FAILURE);
goto done;
}
if ((a_max_plus_one =
BN_to_ASN1_INTEGER(bn, orig = a_max_plus_one)) == NULL) {
a_max_plus_one = orig;
X509V3error(ERR_R_MALLOC_FAILURE);
goto done;
}
/*
* Punt if adjacent or overlapping.
*/
if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) >= 0)
goto done;
}
/*
* Check for inverted range.
*/
i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
{
ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges,
i);
ASN1_INTEGER *a_min, *a_max;
if (a != NULL && a->type == ASIdOrRange_range) {
if (!extract_min_max(a, &a_min, &a_max) ||
ASN1_INTEGER_cmp(a_min, a_max) > 0)
goto done;
}
}
ret = 1;
done:
ASN1_INTEGER_free(a_max_plus_one);
BN_free(bn);
return ret;
}
/*
* Check whether an ASIdentifier extension is in canonical form.
*/
int
X509v3_asid_is_canonical(ASIdentifiers *asid)
{
return (asid == NULL ||
(ASIdentifierChoice_is_canonical(asid->asnum) &&
ASIdentifierChoice_is_canonical(asid->rdi)));
}
/*
* Whack an ASIdentifierChoice into canonical form.
*/
static int
ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
{
ASN1_INTEGER *a_max_plus_one = NULL;
ASN1_INTEGER *orig;
BIGNUM *bn = NULL;
int i, ret = 0;
/*
* Nothing to do for empty element or inheritance.
*/
if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
return 1;
/*
* If not a list, or if empty list, it's broken.
*/
if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0) {
X509V3error(X509V3_R_EXTENSION_VALUE_ERROR);
return 0;
}
/*
* We have a non-empty list. Sort it.
*/
sk_ASIdOrRange_sort(choice->u.asIdsOrRanges);
/*
* Now check for errors and suboptimal encoding, rejecting the
* former and fixing the latter.
*/
for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges,
i);
ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges,
i + 1);
ASN1_INTEGER *a_min = NULL,
*a_max = NULL,
*b_min = NULL,
*b_max =
NULL;
if (!extract_min_max(a, &a_min, &a_max) ||
!extract_min_max(b, &b_min, &b_max))
goto done;
/*
* Make sure we're properly sorted (paranoia).
*/
if (ASN1_INTEGER_cmp(a_min, b_min) > 0)
goto done;
/*
* Punt inverted ranges.
*/
if (ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
ASN1_INTEGER_cmp(b_min, b_max) > 0)
goto done;
/*
* Check for overlaps.
*/
if (ASN1_INTEGER_cmp(a_max, b_min) >= 0) {
X509V3error(X509V3_R_EXTENSION_VALUE_ERROR);
goto done;
}
/*
* Calculate a_max + 1 to check for adjacency.
*/
if ((bn == NULL && (bn = BN_new()) == NULL) ||
ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
!BN_add_word(bn, 1)) {
X509V3error(ERR_R_MALLOC_FAILURE);
goto done;
}
if ((a_max_plus_one =
BN_to_ASN1_INTEGER(bn, orig = a_max_plus_one)) == NULL) {
a_max_plus_one = orig;
X509V3error(ERR_R_MALLOC_FAILURE);
goto done;
}
/*
* If a and b are adjacent, merge them.
*/
if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) == 0) {
ASRange *r;
switch (a->type) {
case ASIdOrRange_id:
if ((r = calloc(1, sizeof(*r))) == NULL) {
X509V3error(ERR_R_MALLOC_FAILURE);
goto done;
}
r->min = a_min;
r->max = b_max;
a->type = ASIdOrRange_range;
a->u.range = r;
break;
case ASIdOrRange_range:
ASN1_INTEGER_free(a->u.range->max);
a->u.range->max = b_max;
break;
}
switch (b->type) {
case ASIdOrRange_id:
b->u.id = NULL;
break;
case ASIdOrRange_range:
b->u.range->max = NULL;
break;
}
ASIdOrRange_free(b);
(void)sk_ASIdOrRange_delete(choice->u.asIdsOrRanges,
i + 1);
i--;
continue;
}
}
/*
* Check for final inverted range.
*/
i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
{
ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges,
i);
ASN1_INTEGER *a_min, *a_max;
if (a != NULL && a->type == ASIdOrRange_range) {
if (!extract_min_max(a, &a_min, &a_max) ||
ASN1_INTEGER_cmp(a_min, a_max) > 0)
goto done;
}
}
/* Paranoia */
if (!ASIdentifierChoice_is_canonical(choice))
goto done;
ret = 1;
done:
ASN1_INTEGER_free(a_max_plus_one);
BN_free(bn);
return ret;
}
/*
* Whack an ASIdentifier extension into canonical form.
*/
int
X509v3_asid_canonize(ASIdentifiers *asid)
{
return (asid == NULL ||
(ASIdentifierChoice_canonize(asid->asnum) &&
ASIdentifierChoice_canonize(asid->rdi)));
}
/*
* 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) {
X509V3error(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 {
X509V3error(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;
X509V3error(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] != '-') {
X509V3error(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') {
X509V3error(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)) {
X509V3error(ERR_R_MALLOC_FAILURE);
goto err;
}
} else {
char *s = strdup(val->value);
if (s == NULL) {
X509V3error(ERR_R_MALLOC_FAILURE);
goto err;
}
s[i1] = '\0';
min = s2i_ASN1_INTEGER(NULL, s);
max = s2i_ASN1_INTEGER(NULL, s + i2);
free(s);
if (min == NULL || max == NULL) {
X509V3error(ERR_R_MALLOC_FAILURE);
goto err;
}
if (ASN1_INTEGER_cmp(min, max) > 0) {
X509V3error(X509V3_R_EXTENSION_VALUE_ERROR);
goto err;
}
}
if (!X509v3_asid_add_id_or_range(asid, which, min, max)) {
X509V3error(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 = {
.ext_nid = NID_sbgp_autonomousSysNum,
.ext_flags = 0,
.it = &ASIdentifiers_it,
.ext_new = NULL,
.ext_free = NULL,
.d2i = NULL,
.i2d = NULL,
.i2s = NULL,
.s2i = NULL,
.i2v = NULL,
.v2i = v2i_ASIdentifiers,
.i2r = i2r_ASIdentifiers,
.r2i = NULL,
.usr_data = NULL,
};
/*
* 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++) {
if (!extract_min_max(sk_ASIdOrRange_value(child, c), &c_min,
&c_max))
return 0;
for (;; p++) {
if (p >= sk_ASIdOrRange_num(parent))
return 0;
if (!extract_min_max(sk_ASIdOrRange_value(parent, p),
&p_min, &p_max))
return 0;
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;
/* We need a non-empty chain to test against. */
if (sk_X509_num(chain) <= 0)
goto err;
/* We need either a store ctx or an extension to work with. */
if (ctx == NULL && ext == NULL)
goto err;
/* If there is a store ctx, it needs a verify_cb. */
if (ctx != NULL && ctx->verify_cb == NULL)
goto err;
/*
* 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);
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);
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.
*/
if (x == NULL)
goto err;
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;
err:
if (ctx != NULL)
ctx->error = X509_V_ERR_UNSPECIFIED;
return 0;
}
#undef validation_err
/*
* RFC 3779 3.3 path validation -- called from X509_verify_cert().
*/
int
X509v3_asid_validate_path(X509_STORE_CTX *ctx)
{
if (sk_X509_num(ctx->chain) <= 0 || ctx->verify_cb == NULL) {
ctx->error = X509_V_ERR_UNSPECIFIED;
return 0;
}
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 (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 */