3570d73bf1
Much of this was done automatically with find . -name '*.c' | xargs sed -E -i '' -e 's/(OPENSSL_PUT_ERROR\([a-zA-Z_0-9]+, )[a-zA-Z_0-9]+, ([a-zA-Z_0-9]+\);)/\1\2/' find . -name '*.c' | xargs sed -E -i '' -e 's/(OPENSSL_PUT_ERROR\([a-zA-Z_0-9]+, )[a-zA-Z_0-9]+, ([a-zA-Z_0-9]+\);)/\1\2/' BUG=468039 Change-Id: I4c75fd95dff85ab1d4a546b05e6aed1aeeb499d8 Reviewed-on: https://boringssl-review.googlesource.com/5276 Reviewed-by: Adam Langley <agl@google.com>
511 lines
14 KiB
C
511 lines
14 KiB
C
/* v3_ncons.c */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project.
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*/
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/* ====================================================================
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* Copyright (c) 2003 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com). */
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#include <stdio.h>
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#include <string.h>
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#include <openssl/asn1t.h>
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#include <openssl/conf.h>
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#include <openssl/err.h>
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#include <openssl/mem.h>
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#include <openssl/obj.h>
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#include <openssl/x509v3.h>
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static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
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X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
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static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
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void *a, BIO *bp, int ind);
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static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
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STACK_OF(GENERAL_SUBTREE) *trees,
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BIO *bp, int ind, const char *name);
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static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
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static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
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static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen);
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static int nc_dn(X509_NAME *sub, X509_NAME *nm);
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static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
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static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);
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static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base);
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const X509V3_EXT_METHOD v3_name_constraints = {
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NID_name_constraints, 0,
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ASN1_ITEM_ref(NAME_CONSTRAINTS),
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0,0,0,0,
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0,0,
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0, v2i_NAME_CONSTRAINTS,
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i2r_NAME_CONSTRAINTS,0,
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NULL
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};
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ASN1_SEQUENCE(GENERAL_SUBTREE) = {
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ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME),
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ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0),
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ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1)
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} ASN1_SEQUENCE_END(GENERAL_SUBTREE)
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ASN1_SEQUENCE(NAME_CONSTRAINTS) = {
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ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees,
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GENERAL_SUBTREE, 0),
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ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees,
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GENERAL_SUBTREE, 1),
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} ASN1_SEQUENCE_END(NAME_CONSTRAINTS)
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IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE)
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IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS)
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static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
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X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
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{
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size_t i;
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CONF_VALUE tval, *val;
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STACK_OF(GENERAL_SUBTREE) **ptree = NULL;
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NAME_CONSTRAINTS *ncons = NULL;
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GENERAL_SUBTREE *sub = NULL;
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ncons = NAME_CONSTRAINTS_new();
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if (!ncons)
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goto memerr;
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for(i = 0; i < sk_CONF_VALUE_num(nval); i++)
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{
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val = sk_CONF_VALUE_value(nval, i);
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if (!strncmp(val->name, "permitted", 9) && val->name[9])
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{
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ptree = &ncons->permittedSubtrees;
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tval.name = val->name + 10;
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}
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else if (!strncmp(val->name, "excluded", 8) && val->name[8])
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{
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ptree = &ncons->excludedSubtrees;
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tval.name = val->name + 9;
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}
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else
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{
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OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_SYNTAX);
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goto err;
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}
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tval.value = val->value;
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sub = GENERAL_SUBTREE_new();
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if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
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goto err;
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if (!*ptree)
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*ptree = sk_GENERAL_SUBTREE_new_null();
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if (!*ptree || !sk_GENERAL_SUBTREE_push(*ptree, sub))
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goto memerr;
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sub = NULL;
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}
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return ncons;
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memerr:
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OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
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err:
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if (ncons)
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NAME_CONSTRAINTS_free(ncons);
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if (sub)
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GENERAL_SUBTREE_free(sub);
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return NULL;
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}
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static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
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BIO *bp, int ind)
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{
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NAME_CONSTRAINTS *ncons = a;
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do_i2r_name_constraints(method, ncons->permittedSubtrees,
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bp, ind, "Permitted");
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do_i2r_name_constraints(method, ncons->excludedSubtrees,
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bp, ind, "Excluded");
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return 1;
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}
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static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
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STACK_OF(GENERAL_SUBTREE) *trees,
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BIO *bp, int ind, const char *name)
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{
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GENERAL_SUBTREE *tree;
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size_t i;
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if (sk_GENERAL_SUBTREE_num(trees) > 0)
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BIO_printf(bp, "%*s%s:\n", ind, "", name);
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for(i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++)
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{
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tree = sk_GENERAL_SUBTREE_value(trees, i);
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BIO_printf(bp, "%*s", ind + 2, "");
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if (tree->base->type == GEN_IPADD)
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print_nc_ipadd(bp, tree->base->d.ip);
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else
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GENERAL_NAME_print(bp, tree->base);
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BIO_puts(bp, "\n");
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}
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return 1;
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}
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static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip)
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{
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int i, len;
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unsigned char *p;
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p = ip->data;
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len = ip->length;
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BIO_puts(bp, "IP:");
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if(len == 8)
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{
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BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d",
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p[0], p[1], p[2], p[3],
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p[4], p[5], p[6], p[7]);
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}
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else if(len == 32)
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{
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for (i = 0; i < 16; i++)
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{
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BIO_printf(bp, "%X", p[0] << 8 | p[1]);
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p += 2;
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if (i == 7)
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BIO_puts(bp, "/");
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else if (i != 15)
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BIO_puts(bp, ":");
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}
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}
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else
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BIO_printf(bp, "IP Address:<invalid>");
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return 1;
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}
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/* Check a certificate conforms to a specified set of constraints.
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* Return values:
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* X509_V_OK: All constraints obeyed.
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* X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation.
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* X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation.
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* X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type.
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* X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type.
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* X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax.
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* X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name
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*/
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int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc)
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{
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int r, i;
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size_t j;
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X509_NAME *nm;
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nm = X509_get_subject_name(x);
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if (X509_NAME_entry_count(nm) > 0)
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{
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GENERAL_NAME gntmp;
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gntmp.type = GEN_DIRNAME;
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gntmp.d.directoryName = nm;
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r = nc_match(&gntmp, nc);
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if (r != X509_V_OK)
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return r;
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gntmp.type = GEN_EMAIL;
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/* Process any email address attributes in subject name */
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for (i = -1;;)
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{
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X509_NAME_ENTRY *ne;
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i = X509_NAME_get_index_by_NID(nm,
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NID_pkcs9_emailAddress,
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i);
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if (i == -1)
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break;
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ne = X509_NAME_get_entry(nm, i);
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gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne);
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if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING)
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return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
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r = nc_match(&gntmp, nc);
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if (r != X509_V_OK)
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return r;
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}
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}
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for (j = 0; j < sk_GENERAL_NAME_num(x->altname); j++)
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{
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GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, j);
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r = nc_match(gen, nc);
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if (r != X509_V_OK)
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return r;
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}
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return X509_V_OK;
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}
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static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc)
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{
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GENERAL_SUBTREE *sub;
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int r, match = 0;
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size_t i;
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/* Permitted subtrees: if any subtrees exist of matching the type
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* at least one subtree must match.
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*/
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for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++)
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{
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sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i);
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if (gen->type != sub->base->type)
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continue;
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if (sub->minimum || sub->maximum)
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return X509_V_ERR_SUBTREE_MINMAX;
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/* If we already have a match don't bother trying any more */
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if (match == 2)
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continue;
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if (match == 0)
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match = 1;
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r = nc_match_single(gen, sub->base);
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if (r == X509_V_OK)
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match = 2;
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else if (r != X509_V_ERR_PERMITTED_VIOLATION)
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return r;
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}
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if (match == 1)
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return X509_V_ERR_PERMITTED_VIOLATION;
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/* Excluded subtrees: must not match any of these */
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for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++)
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{
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sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i);
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if (gen->type != sub->base->type)
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continue;
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if (sub->minimum || sub->maximum)
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return X509_V_ERR_SUBTREE_MINMAX;
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r = nc_match_single(gen, sub->base);
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if (r == X509_V_OK)
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return X509_V_ERR_EXCLUDED_VIOLATION;
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else if (r != X509_V_ERR_PERMITTED_VIOLATION)
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return r;
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}
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return X509_V_OK;
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}
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static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base)
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{
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switch(base->type)
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{
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case GEN_DIRNAME:
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return nc_dn(gen->d.directoryName, base->d.directoryName);
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case GEN_DNS:
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return nc_dns(gen->d.dNSName, base->d.dNSName);
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case GEN_EMAIL:
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return nc_email(gen->d.rfc822Name, base->d.rfc822Name);
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case GEN_URI:
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return nc_uri(gen->d.uniformResourceIdentifier,
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base->d.uniformResourceIdentifier);
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default:
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return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE;
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}
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}
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/* directoryName name constraint matching.
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* The canonical encoding of X509_NAME makes this comparison easy. It is
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* matched if the subtree is a subset of the name.
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*/
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static int nc_dn(X509_NAME *nm, X509_NAME *base)
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{
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/* Ensure canonical encodings are up to date. */
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if (nm->modified && i2d_X509_NAME(nm, NULL) < 0)
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return X509_V_ERR_OUT_OF_MEM;
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if (base->modified && i2d_X509_NAME(base, NULL) < 0)
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return X509_V_ERR_OUT_OF_MEM;
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if (base->canon_enclen > nm->canon_enclen)
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return X509_V_ERR_PERMITTED_VIOLATION;
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if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen))
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return X509_V_ERR_PERMITTED_VIOLATION;
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return X509_V_OK;
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}
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static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
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{
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char *baseptr = (char *)base->data;
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char *dnsptr = (char *)dns->data;
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/* Empty matches everything */
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if (!*baseptr)
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return X509_V_OK;
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/* Otherwise can add zero or more components on the left so
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* compare RHS and if dns is longer and expect '.' as preceding
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* character.
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*/
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if (dns->length > base->length)
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{
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dnsptr += dns->length - base->length;
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if (*baseptr != '.' && dnsptr[-1] != '.')
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return X509_V_ERR_PERMITTED_VIOLATION;
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}
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if (OPENSSL_strcasecmp(baseptr, dnsptr))
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return X509_V_ERR_PERMITTED_VIOLATION;
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return X509_V_OK;
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}
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static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base)
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{
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const char *baseptr = (char *)base->data;
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const char *emlptr = (char *)eml->data;
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const char *baseat = strchr(baseptr, '@');
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const char *emlat = strchr(emlptr, '@');
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if (!emlat)
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return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
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/* Special case: inital '.' is RHS match */
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if (!baseat && (*baseptr == '.'))
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{
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if (eml->length > base->length)
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{
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emlptr += eml->length - base->length;
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if (!OPENSSL_strcasecmp(baseptr, emlptr))
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return X509_V_OK;
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}
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return X509_V_ERR_PERMITTED_VIOLATION;
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}
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/* If we have anything before '@' match local part */
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if (baseat)
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{
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if (baseat != baseptr)
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{
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if ((baseat - baseptr) != (emlat - emlptr))
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return X509_V_ERR_PERMITTED_VIOLATION;
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/* Case sensitive match of local part */
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if (strncmp(baseptr, emlptr, emlat - emlptr))
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return X509_V_ERR_PERMITTED_VIOLATION;
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}
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/* Position base after '@' */
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baseptr = baseat + 1;
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}
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emlptr = emlat + 1;
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/* Just have hostname left to match: case insensitive */
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if (OPENSSL_strcasecmp(baseptr, emlptr))
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return X509_V_ERR_PERMITTED_VIOLATION;
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return X509_V_OK;
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}
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static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
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{
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const char *baseptr = (char *)base->data;
|
|
const char *hostptr = (char *)uri->data;
|
|
const char *p = strchr(hostptr, ':');
|
|
int hostlen;
|
|
/* Check for foo:// and skip past it */
|
|
if (!p || (p[1] != '/') || (p[2] != '/'))
|
|
return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
|
|
hostptr = p + 3;
|
|
|
|
/* Determine length of hostname part of URI */
|
|
|
|
/* Look for a port indicator as end of hostname first */
|
|
|
|
p = strchr(hostptr, ':');
|
|
/* Otherwise look for trailing slash */
|
|
if (!p)
|
|
p = strchr(hostptr, '/');
|
|
|
|
if (!p)
|
|
hostlen = strlen(hostptr);
|
|
else
|
|
hostlen = p - hostptr;
|
|
|
|
if (hostlen == 0)
|
|
return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
|
|
|
|
/* Special case: inital '.' is RHS match */
|
|
if (*baseptr == '.')
|
|
{
|
|
if (hostlen > base->length)
|
|
{
|
|
p = hostptr + hostlen - base->length;
|
|
if (!OPENSSL_strncasecmp(p, baseptr, base->length))
|
|
return X509_V_OK;
|
|
}
|
|
return X509_V_ERR_PERMITTED_VIOLATION;
|
|
}
|
|
|
|
if ((base->length != (int)hostlen) || OPENSSL_strncasecmp(hostptr, baseptr, hostlen))
|
|
return X509_V_ERR_PERMITTED_VIOLATION;
|
|
|
|
return X509_V_OK;
|
|
|
|
}
|