diff options
Diffstat (limited to 'main/openssl/crypto/x509v3/v3_ncons.c')
| -rw-r--r-- | main/openssl/crypto/x509v3/v3_ncons.c | 505 |
1 files changed, 505 insertions, 0 deletions
diff --git a/main/openssl/crypto/x509v3/v3_ncons.c b/main/openssl/crypto/x509v3/v3_ncons.c new file mode 100644 index 00000000..a01dc64d --- /dev/null +++ b/main/openssl/crypto/x509v3/v3_ncons.c @@ -0,0 +1,505 @@ +/* v3_ncons.c */ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project. + */ +/* ==================================================================== + * Copyright (c) 2003 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). + * + */ + + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/asn1t.h> +#include <openssl/conf.h> +#include <openssl/x509v3.h> + +static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, + X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval); +static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, + void *a, BIO *bp, int ind); +static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, + STACK_OF(GENERAL_SUBTREE) *trees, + BIO *bp, int ind, char *name); +static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip); + +static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc); +static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen); +static int nc_dn(X509_NAME *sub, X509_NAME *nm); +static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns); +static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml); +static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base); + +const X509V3_EXT_METHOD v3_name_constraints = { + NID_name_constraints, 0, + ASN1_ITEM_ref(NAME_CONSTRAINTS), + 0,0,0,0, + 0,0, + 0, v2i_NAME_CONSTRAINTS, + i2r_NAME_CONSTRAINTS,0, + NULL +}; + +ASN1_SEQUENCE(GENERAL_SUBTREE) = { + ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME), + ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0), + ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1) +} ASN1_SEQUENCE_END(GENERAL_SUBTREE) + +ASN1_SEQUENCE(NAME_CONSTRAINTS) = { + ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees, + GENERAL_SUBTREE, 0), + ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees, + GENERAL_SUBTREE, 1), +} ASN1_SEQUENCE_END(NAME_CONSTRAINTS) + + +IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE) +IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS) + +static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, + X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) + { + int i; + CONF_VALUE tval, *val; + STACK_OF(GENERAL_SUBTREE) **ptree = NULL; + NAME_CONSTRAINTS *ncons = NULL; + GENERAL_SUBTREE *sub = NULL; + ncons = NAME_CONSTRAINTS_new(); + if (!ncons) + goto memerr; + for(i = 0; i < sk_CONF_VALUE_num(nval); i++) + { + val = sk_CONF_VALUE_value(nval, i); + if (!strncmp(val->name, "permitted", 9) && val->name[9]) + { + ptree = &ncons->permittedSubtrees; + tval.name = val->name + 10; + } + else if (!strncmp(val->name, "excluded", 8) && val->name[8]) + { + ptree = &ncons->excludedSubtrees; + tval.name = val->name + 9; + } + else + { + X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, X509V3_R_INVALID_SYNTAX); + goto err; + } + tval.value = val->value; + sub = GENERAL_SUBTREE_new(); + if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1)) + goto err; + if (!*ptree) + *ptree = sk_GENERAL_SUBTREE_new_null(); + if (!*ptree || !sk_GENERAL_SUBTREE_push(*ptree, sub)) + goto memerr; + sub = NULL; + } + + return ncons; + + memerr: + X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE); + err: + if (ncons) + NAME_CONSTRAINTS_free(ncons); + if (sub) + GENERAL_SUBTREE_free(sub); + + return NULL; + } + + + + +static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, + BIO *bp, int ind) + { + NAME_CONSTRAINTS *ncons = a; + do_i2r_name_constraints(method, ncons->permittedSubtrees, + bp, ind, "Permitted"); + do_i2r_name_constraints(method, ncons->excludedSubtrees, + bp, ind, "Excluded"); + return 1; + } + +static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, + STACK_OF(GENERAL_SUBTREE) *trees, + BIO *bp, int ind, char *name) + { + GENERAL_SUBTREE *tree; + int i; + if (sk_GENERAL_SUBTREE_num(trees) > 0) + BIO_printf(bp, "%*s%s:\n", ind, "", name); + for(i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++) + { + tree = sk_GENERAL_SUBTREE_value(trees, i); + BIO_printf(bp, "%*s", ind + 2, ""); + if (tree->base->type == GEN_IPADD) + print_nc_ipadd(bp, tree->base->d.ip); + else + GENERAL_NAME_print(bp, tree->base); + BIO_puts(bp, "\n"); + } + return 1; + } + +static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip) + { + int i, len; + unsigned char *p; + p = ip->data; + len = ip->length; + BIO_puts(bp, "IP:"); + if(len == 8) + { + BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d", + p[0], p[1], p[2], p[3], + p[4], p[5], p[6], p[7]); + } + else if(len == 32) + { + for (i = 0; i < 16; i++) + { + BIO_printf(bp, "%X", p[0] << 8 | p[1]); + p += 2; + if (i == 7) + BIO_puts(bp, "/"); + else if (i != 15) + BIO_puts(bp, ":"); + } + } + else + BIO_printf(bp, "IP Address:<invalid>"); + return 1; + } + +/* Check a certificate conforms to a specified set of constraints. + * Return values: + * X509_V_OK: All constraints obeyed. + * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation. + * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation. + * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type. + * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type. + * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax. + * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name + + */ + +int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc) + { + int r, i; + X509_NAME *nm; + + nm = X509_get_subject_name(x); + + if (X509_NAME_entry_count(nm) > 0) + { + GENERAL_NAME gntmp; + gntmp.type = GEN_DIRNAME; + gntmp.d.directoryName = nm; + + r = nc_match(&gntmp, nc); + + if (r != X509_V_OK) + return r; + + gntmp.type = GEN_EMAIL; + + + /* Process any email address attributes in subject name */ + + for (i = -1;;) + { + X509_NAME_ENTRY *ne; + i = X509_NAME_get_index_by_NID(nm, + NID_pkcs9_emailAddress, + i); + if (i == -1) + break; + ne = X509_NAME_get_entry(nm, i); + gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne); + if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING) + return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; + + r = nc_match(&gntmp, nc); + + if (r != X509_V_OK) + return r; + } + + } + + for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) + { + GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i); + r = nc_match(gen, nc); + if (r != X509_V_OK) + return r; + } + + return X509_V_OK; + + } + +static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc) + { + GENERAL_SUBTREE *sub; + int i, r, match = 0; + + /* Permitted subtrees: if any subtrees exist of matching the type + * at least one subtree must match. + */ + + for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) + { + sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i); + if (gen->type != sub->base->type) + continue; + if (sub->minimum || sub->maximum) + return X509_V_ERR_SUBTREE_MINMAX; + /* If we already have a match don't bother trying any more */ + if (match == 2) + continue; + if (match == 0) + match = 1; + r = nc_match_single(gen, sub->base); + if (r == X509_V_OK) + match = 2; + else if (r != X509_V_ERR_PERMITTED_VIOLATION) + return r; + } + + if (match == 1) + return X509_V_ERR_PERMITTED_VIOLATION; + + /* Excluded subtrees: must not match any of these */ + + for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) + { + sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i); + if (gen->type != sub->base->type) + continue; + if (sub->minimum || sub->maximum) + return X509_V_ERR_SUBTREE_MINMAX; + + r = nc_match_single(gen, sub->base); + if (r == X509_V_OK) + return X509_V_ERR_EXCLUDED_VIOLATION; + else if (r != X509_V_ERR_PERMITTED_VIOLATION) + return r; + + } + + return X509_V_OK; + + } + +static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base) + { + switch(base->type) + { + case GEN_DIRNAME: + return nc_dn(gen->d.directoryName, base->d.directoryName); + + case GEN_DNS: + return nc_dns(gen->d.dNSName, base->d.dNSName); + + case GEN_EMAIL: + return nc_email(gen->d.rfc822Name, base->d.rfc822Name); + + case GEN_URI: + return nc_uri(gen->d.uniformResourceIdentifier, + base->d.uniformResourceIdentifier); + + default: + return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE; + } + + } + +/* directoryName name constraint matching. + * The canonical encoding of X509_NAME makes this comparison easy. It is + * matched if the subtree is a subset of the name. + */ + +static int nc_dn(X509_NAME *nm, X509_NAME *base) + { + /* Ensure canonical encodings are up to date. */ + if (nm->modified && i2d_X509_NAME(nm, NULL) < 0) + return X509_V_ERR_OUT_OF_MEM; + if (base->modified && i2d_X509_NAME(base, NULL) < 0) + return X509_V_ERR_OUT_OF_MEM; + if (base->canon_enclen > nm->canon_enclen) + return X509_V_ERR_PERMITTED_VIOLATION; + if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen)) + return X509_V_ERR_PERMITTED_VIOLATION; + return X509_V_OK; + } + +static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base) + { + char *baseptr = (char *)base->data; + char *dnsptr = (char *)dns->data; + /* Empty matches everything */ + if (!*baseptr) + return X509_V_OK; + /* Otherwise can add zero or more components on the left so + * compare RHS and if dns is longer and expect '.' as preceding + * character. + */ + if (dns->length > base->length) + { + dnsptr += dns->length - base->length; + if (dnsptr[-1] != '.') + return X509_V_ERR_PERMITTED_VIOLATION; + } + + if (strcasecmp(baseptr, dnsptr)) + return X509_V_ERR_PERMITTED_VIOLATION; + + return X509_V_OK; + + } + +static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base) + { + const char *baseptr = (char *)base->data; + const char *emlptr = (char *)eml->data; + + const char *baseat = strchr(baseptr, '@'); + const char *emlat = strchr(emlptr, '@'); + if (!emlat) + return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; + /* Special case: inital '.' is RHS match */ + if (!baseat && (*baseptr == '.')) + { + if (eml->length > base->length) + { + emlptr += eml->length - base->length; + if (!strcasecmp(baseptr, emlptr)) + return X509_V_OK; + } + return X509_V_ERR_PERMITTED_VIOLATION; + } + + /* If we have anything before '@' match local part */ + + if (baseat) + { + if (baseat != baseptr) + { + if ((baseat - baseptr) != (emlat - emlptr)) + return X509_V_ERR_PERMITTED_VIOLATION; + /* Case sensitive match of local part */ + if (strncmp(baseptr, emlptr, emlat - emlptr)) + return X509_V_ERR_PERMITTED_VIOLATION; + } + /* Position base after '@' */ + baseptr = baseat + 1; + } + emlptr = emlat + 1; + /* Just have hostname left to match: case insensitive */ + if (strcasecmp(baseptr, emlptr)) + return X509_V_ERR_PERMITTED_VIOLATION; + + return X509_V_OK; + + } + +static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base) + { + 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 (!strncasecmp(p, baseptr, base->length)) + return X509_V_OK; + } + return X509_V_ERR_PERMITTED_VIOLATION; + } + + if ((base->length != (int)hostlen) || strncasecmp(hostptr, baseptr, hostlen)) + return X509_V_ERR_PERMITTED_VIOLATION; + + return X509_V_OK; + + } |