From dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0 Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 12 Sep 2011 11:27:51 +0200 Subject: Synchronised line endinge with release branch --- openssl/crypto/x509v3/v3_asid.c | 1686 +++++++++++++++++++-------------------- 1 file changed, 843 insertions(+), 843 deletions(-) (limited to 'openssl/crypto/x509v3/v3_asid.c') diff --git a/openssl/crypto/x509v3/v3_asid.c b/openssl/crypto/x509v3/v3_asid.c index fb7bc147c..3f434c060 100644 --- a/openssl/crypto/x509v3/v3_asid.c +++ b/openssl/crypto/x509v3/v3_asid.c @@ -1,843 +1,843 @@ -/* - * 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 -#include -#include "cryptlib.h" -#include -#include -#include -#include -#include -#include - -#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; - } - - 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; - - /* - * We have a list. Sort it. - */ - OPENSSL_assert(choice->type == ASIdentifierChoice_asIdsOrRanges); - 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); - - /* - * 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); - sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1); - i--; - continue; - } - } - - 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) -{ - 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); - ASN1_INTEGER *min = NULL, *max = NULL; - 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) { - ASN1_INTEGER_free(min); - ASN1_INTEGER_free(max); - X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE); - goto err; - } - } - if (!v3_asid_add_id_or_range(asid, which, min, max)) { - ASN1_INTEGER_free(min); - ASN1_INTEGER_free(max); - X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE); - goto err; - } - } - - /* - * Canonize the result, then we're done. - */ - if (!v3_asid_canonize(asid)) - goto err; - return asid; - - err: - ASIdentifiers_free(asid); - 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 */ +/* + * 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 +#include +#include "cryptlib.h" +#include +#include +#include +#include +#include +#include + +#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; + } + + 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; + + /* + * We have a list. Sort it. + */ + OPENSSL_assert(choice->type == ASIdentifierChoice_asIdsOrRanges); + 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); + + /* + * 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); + sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1); + i--; + continue; + } + } + + 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) +{ + 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); + ASN1_INTEGER *min = NULL, *max = NULL; + 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) { + ASN1_INTEGER_free(min); + ASN1_INTEGER_free(max); + X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE); + goto err; + } + } + if (!v3_asid_add_id_or_range(asid, which, min, max)) { + ASN1_INTEGER_free(min); + ASN1_INTEGER_free(max); + X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE); + goto err; + } + } + + /* + * Canonize the result, then we're done. + */ + if (!v3_asid_canonize(asid)) + goto err; + return asid; + + err: + ASIdentifiers_free(asid); + 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 */ -- cgit v1.2.3