--- /dev/null
+/*
+ * Contributed to the OpenSSL Project by the American Registry for
+ * Internet Numbers ("ARIN").
+ */
+/* ====================================================================
+ * Copyright (c) 2006 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 <string.h>
+#include "cryptlib.h"
+#include <openssl/conf.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/x509v3.h>
+#include <openssl/x509.h>
+#include <openssl/bn.h>
+
+#ifndef OPENSSL_NO_RFC3779
+
+/*
+ * OpenSSL ASN.1 template translation of RFC 3779 3.2.3.
+ */
+
+ASN1_SEQUENCE(ASRange) = {
+ ASN1_SIMPLE(ASRange, min, ASN1_INTEGER),
+ ASN1_SIMPLE(ASRange, max, ASN1_INTEGER)
+} ASN1_SEQUENCE_END(ASRange)
+
+ASN1_CHOICE(ASIdOrRange) = {
+ ASN1_SIMPLE(ASIdOrRange, u.id, ASN1_INTEGER),
+ ASN1_SIMPLE(ASIdOrRange, u.range, ASRange)
+} ASN1_CHOICE_END(ASIdOrRange)
+
+ASN1_CHOICE(ASIdentifierChoice) = {
+ ASN1_SIMPLE(ASIdentifierChoice, u.inherit, ASN1_NULL),
+ ASN1_SEQUENCE_OF(ASIdentifierChoice, u.asIdsOrRanges, ASIdOrRange)
+} ASN1_CHOICE_END(ASIdentifierChoice)
+
+ASN1_SEQUENCE(ASIdentifiers) = {
+ ASN1_EXP_OPT(ASIdentifiers, asnum, ASIdentifierChoice, 0),
+ ASN1_EXP_OPT(ASIdentifiers, rdi, ASIdentifierChoice, 1)
+} ASN1_SEQUENCE_END(ASIdentifiers)
+
+IMPLEMENT_ASN1_FUNCTIONS(ASRange)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdOrRange)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdentifierChoice)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdentifiers)
+
+/*
+ * 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);
+ OPENSSL_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);
+ OPENSSL_free(s);
+ if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->max)) == NULL)
+ return 0;
+ BIO_printf(out, "%s\n", s);
+ OPENSSL_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 comparision 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_;
+
+ 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 v3_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;
+ OPENSSL_assert((*choice)->u.inherit == NULL);
+ 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 v3_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;
+ OPENSSL_assert((*choice)->u.asIdsOrRanges == NULL);
+ (*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 void extract_min_max(ASIdOrRange *aor,
+ ASN1_INTEGER **min,
+ ASN1_INTEGER **max)
+{
+ OPENSSL_assert(aor != NULL && min != NULL && max != NULL);
+ switch (aor->type) {
+ case ASIdOrRange_id:
+ *min = aor->u.id;
+ *max = aor->u.id;
+ return;
+ case ASIdOrRange_range:
+ *min = aor->u.range->min;
+ *max = aor->u.range->max;
+ return;
+ }
+}
+
+/*
+ * Check whether an ASIdentifierChoice is in canonical form.
+ */
+static int ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice)
+{
+ ASN1_INTEGER *a_max_plus_one = NULL;
+ 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, *a_max, *b_min, *b_max;
+
+ extract_min_max(a, &a_min, &a_max);
+ extract_min_max(b, &b_min, &b_max);
+
+ /*
+ * 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) ||
+ (a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
+ X509V3err(X509V3_F_ASIDENTIFIERCHOICE_IS_CANONICAL,
+ 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) {
+ extract_min_max(a, &a_min, &a_max);
+ if (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 v3_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;
+ 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) {
+ X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+ 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, *a_max, *b_min, *b_max;
+
+ extract_min_max(a, &a_min, &a_max);
+ extract_min_max(b, &b_min, &b_max);
+
+ /*
+ * Make sure we're properly sorted (paranoia).
+ */
+ OPENSSL_assert(ASN1_INTEGER_cmp(a_min, b_min) <= 0);
+
+ /*
+ * 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) {
+ X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+ 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) ||
+ (a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
+ X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE, 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 = OPENSSL_malloc(sizeof(ASRange))) == NULL) {
+ X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+ 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) {
+ extract_min_max(a, &a_min, &a_max);
+ if (ASN1_INTEGER_cmp(a_min, a_max) > 0)
+ goto done;
+ }
+ }
+
+ OPENSSL_assert(ASIdentifierChoice_is_canonical(choice)); /* Paranoia */
+
+ ret = 1;
+
+ done:
+ ASN1_INTEGER_free(a_max_plus_one);
+ BN_free(bn);
+ return ret;
+}
+
+/*
+ * Whack an ASIdentifier extension into canonical form.
+ */
+int v3_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) {
+ 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, i2, i3, is_range, which;
+
+ /*
+ * 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")) {
+ if (v3_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 = BUF_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 (!v3_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 (!v3_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 v3_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, *p_max, *c_min, *c_max;
+ 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 subet of b.
+ */
+int v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b)
+{
+ return (a == NULL ||
+ a == b ||
+ (b != NULL &&
+ !v3_asid_inherits(a) &&
+ !v3_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 v3_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 (!v3_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 (!v3_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 v3_asid_validate_path(X509_STORE_CTX *ctx)
+{
+ return v3_asid_validate_path_internal(ctx, ctx->chain, NULL);
+}
+
+/*
+ * RFC 3779 3.3 path validation of an extension.
+ * Test whether chain covers extension.
+ */
+int v3_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 && v3_asid_inherits(ext))
+ return 0;
+ return v3_asid_validate_path_internal(NULL, chain, ext);
+}
+
+#endif /* OPENSSL_NO_RFC3779 */
projects / cassiopeia.git / blobdiff