536 lines
17 KiB
C
536 lines
17 KiB
C
/* crypto/asn1/x_name.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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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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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include "cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/x509.h>
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#include "asn1_locl.h"
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typedef STACK_OF(X509_NAME_ENTRY) STACK_OF_X509_NAME_ENTRY;
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DECLARE_STACK_OF(STACK_OF_X509_NAME_ENTRY)
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/*
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* Maximum length of X509_NAME: much larger than anything we should
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* ever see in practice.
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*/
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#define X509_NAME_MAX (1024 * 1024)
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static int x509_name_ex_d2i(ASN1_VALUE **val,
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const unsigned char **in, long len,
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const ASN1_ITEM *it,
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int tag, int aclass, char opt, ASN1_TLC *ctx);
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static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
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const ASN1_ITEM *it, int tag, int aclass);
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static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
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static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
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static int x509_name_encode(X509_NAME *a);
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static int x509_name_canon(X509_NAME *a);
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static int asn1_string_canon(ASN1_STRING *out, ASN1_STRING *in);
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static int i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) * intname,
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unsigned char **in);
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static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
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int indent,
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const char *fname, const ASN1_PCTX *pctx);
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ASN1_SEQUENCE(X509_NAME_ENTRY) = {
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ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
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ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
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} ASN1_SEQUENCE_END(X509_NAME_ENTRY)
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IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
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IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
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/*
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* For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY } so
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* declare two template wrappers for this
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*/
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ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
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ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
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ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
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ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
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ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
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ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
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/*
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* Normally that's where it would end: we'd have two nested STACK structures
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* representing the ASN1. Unfortunately X509_NAME uses a completely different
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* form and caches encodings so we have to process the internal form and
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* convert to the external form.
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*/
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const ASN1_EXTERN_FUNCS x509_name_ff = {
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NULL,
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x509_name_ex_new,
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x509_name_ex_free,
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0, /* Default clear behaviour is OK */
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x509_name_ex_d2i,
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x509_name_ex_i2d,
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x509_name_ex_print
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};
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IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
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IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
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IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
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static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
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{
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X509_NAME *ret = NULL;
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ret = OPENSSL_malloc(sizeof(X509_NAME));
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if (!ret)
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goto memerr;
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if ((ret->entries = sk_X509_NAME_ENTRY_new_null()) == NULL)
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goto memerr;
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if ((ret->bytes = BUF_MEM_new()) == NULL)
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goto memerr;
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ret->canon_enc = NULL;
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ret->canon_enclen = 0;
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ret->modified = 1;
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*val = (ASN1_VALUE *)ret;
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return 1;
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memerr:
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ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
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if (ret) {
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if (ret->entries)
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sk_X509_NAME_ENTRY_free(ret->entries);
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OPENSSL_free(ret);
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}
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return 0;
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}
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static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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X509_NAME *a;
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if (!pval || !*pval)
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return;
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a = (X509_NAME *)*pval;
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BUF_MEM_free(a->bytes);
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sk_X509_NAME_ENTRY_pop_free(a->entries, X509_NAME_ENTRY_free);
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if (a->canon_enc)
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OPENSSL_free(a->canon_enc);
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OPENSSL_free(a);
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*pval = NULL;
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}
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static void local_sk_X509_NAME_ENTRY_free(STACK_OF(X509_NAME_ENTRY) *ne)
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{
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sk_X509_NAME_ENTRY_free(ne);
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}
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static void local_sk_X509_NAME_ENTRY_pop_free(STACK_OF(X509_NAME_ENTRY) *ne)
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{
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sk_X509_NAME_ENTRY_pop_free(ne, X509_NAME_ENTRY_free);
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}
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static int x509_name_ex_d2i(ASN1_VALUE **val,
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const unsigned char **in, long len,
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const ASN1_ITEM *it, int tag, int aclass,
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char opt, ASN1_TLC *ctx)
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{
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const unsigned char *p = *in, *q;
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union {
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STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
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ASN1_VALUE *a;
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} intname = {
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NULL
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};
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union {
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X509_NAME *x;
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ASN1_VALUE *a;
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} nm = {
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NULL
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};
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int i, j, ret;
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STACK_OF(X509_NAME_ENTRY) *entries;
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X509_NAME_ENTRY *entry;
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if (len > X509_NAME_MAX)
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len = X509_NAME_MAX;
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q = p;
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/* Get internal representation of Name */
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ret = ASN1_item_ex_d2i(&intname.a,
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&p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
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tag, aclass, opt, ctx);
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if (ret <= 0)
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return ret;
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if (*val)
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x509_name_ex_free(val, NULL);
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if (!x509_name_ex_new(&nm.a, NULL))
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goto err;
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/* We've decoded it: now cache encoding */
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if (!BUF_MEM_grow(nm.x->bytes, p - q))
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goto err;
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memcpy(nm.x->bytes->data, q, p - q);
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/* Convert internal representation to X509_NAME structure */
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for (i = 0; i < sk_STACK_OF_X509_NAME_ENTRY_num(intname.s); i++) {
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entries = sk_STACK_OF_X509_NAME_ENTRY_value(intname.s, i);
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for (j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
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entry = sk_X509_NAME_ENTRY_value(entries, j);
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entry->set = i;
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if (!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))
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goto err;
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sk_X509_NAME_ENTRY_set(entries, j, NULL);
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}
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}
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ret = x509_name_canon(nm.x);
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if (!ret)
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goto err;
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_free);
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nm.x->modified = 0;
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*val = nm.a;
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*in = p;
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return ret;
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err:
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if (nm.x != NULL)
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X509_NAME_free(nm.x);
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_pop_free);
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ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
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return 0;
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}
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static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
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const ASN1_ITEM *it, int tag, int aclass)
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{
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int ret;
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X509_NAME *a = (X509_NAME *)*val;
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if (a->modified) {
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ret = x509_name_encode(a);
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if (ret < 0)
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return ret;
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ret = x509_name_canon(a);
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if (ret < 0)
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return ret;
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}
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ret = a->bytes->length;
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if (out != NULL) {
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memcpy(*out, a->bytes->data, ret);
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*out += ret;
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}
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return ret;
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}
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static int x509_name_encode(X509_NAME *a)
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{
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union {
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STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
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ASN1_VALUE *a;
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} intname = {
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NULL
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};
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int len;
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unsigned char *p;
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STACK_OF(X509_NAME_ENTRY) *entries = NULL;
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X509_NAME_ENTRY *entry;
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int i, set = -1;
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intname.s = sk_STACK_OF_X509_NAME_ENTRY_new_null();
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if (!intname.s)
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goto memerr;
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for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
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entry = sk_X509_NAME_ENTRY_value(a->entries, i);
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if (entry->set != set) {
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entries = sk_X509_NAME_ENTRY_new_null();
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if (!entries)
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goto memerr;
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if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname.s, entries)) {
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sk_X509_NAME_ENTRY_free(entries);
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goto memerr;
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}
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set = entry->set;
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}
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if (!sk_X509_NAME_ENTRY_push(entries, entry))
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goto memerr;
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}
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len = ASN1_item_ex_i2d(&intname.a, NULL,
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ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
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if (!BUF_MEM_grow(a->bytes, len))
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goto memerr;
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p = (unsigned char *)a->bytes->data;
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ASN1_item_ex_i2d(&intname.a,
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&p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_free);
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a->modified = 0;
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return len;
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memerr:
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_free);
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ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
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return -1;
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}
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static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
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int indent,
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const char *fname, const ASN1_PCTX *pctx)
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{
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if (X509_NAME_print_ex(out, (X509_NAME *)*pval,
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indent, pctx->nm_flags) <= 0)
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return 0;
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return 2;
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}
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/*
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* This function generates the canonical encoding of the Name structure. In
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* it all strings are converted to UTF8, leading, trailing and multiple
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* spaces collapsed, converted to lower case and the leading SEQUENCE header
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* removed. In future we could also normalize the UTF8 too. By doing this
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* comparison of Name structures can be rapidly perfomed by just using
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* memcmp() of the canonical encoding. By omitting the leading SEQUENCE name
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* constraints of type dirName can also be checked with a simple memcmp().
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*/
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static int x509_name_canon(X509_NAME *a)
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{
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unsigned char *p;
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STACK_OF(STACK_OF_X509_NAME_ENTRY) *intname = NULL;
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STACK_OF(X509_NAME_ENTRY) *entries = NULL;
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X509_NAME_ENTRY *entry, *tmpentry = NULL;
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int i, set = -1, ret = 0;
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if (a->canon_enc) {
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OPENSSL_free(a->canon_enc);
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a->canon_enc = NULL;
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}
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/* Special case: empty X509_NAME => null encoding */
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if (sk_X509_NAME_ENTRY_num(a->entries) == 0) {
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a->canon_enclen = 0;
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return 1;
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}
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intname = sk_STACK_OF_X509_NAME_ENTRY_new_null();
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if (!intname)
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goto err;
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for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
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entry = sk_X509_NAME_ENTRY_value(a->entries, i);
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if (entry->set != set) {
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entries = sk_X509_NAME_ENTRY_new_null();
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if (!entries)
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goto err;
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if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname, entries)) {
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sk_X509_NAME_ENTRY_free(entries);
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goto err;
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}
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set = entry->set;
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}
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tmpentry = X509_NAME_ENTRY_new();
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if (!tmpentry)
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goto err;
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tmpentry->object = OBJ_dup(entry->object);
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if (!asn1_string_canon(tmpentry->value, entry->value))
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goto err;
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if (!sk_X509_NAME_ENTRY_push(entries, tmpentry))
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goto err;
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tmpentry = NULL;
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}
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/* Finally generate encoding */
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a->canon_enclen = i2d_name_canon(intname, NULL);
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p = OPENSSL_malloc(a->canon_enclen);
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if (!p)
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goto err;
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a->canon_enc = p;
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i2d_name_canon(intname, &p);
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ret = 1;
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err:
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if (tmpentry)
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X509_NAME_ENTRY_free(tmpentry);
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if (intname)
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname,
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local_sk_X509_NAME_ENTRY_pop_free);
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return ret;
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}
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/* Bitmap of all the types of string that will be canonicalized. */
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#define ASN1_MASK_CANON \
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(B_ASN1_UTF8STRING | B_ASN1_BMPSTRING | B_ASN1_UNIVERSALSTRING \
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| B_ASN1_PRINTABLESTRING | B_ASN1_T61STRING | B_ASN1_IA5STRING \
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| B_ASN1_VISIBLESTRING)
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static int asn1_string_canon(ASN1_STRING *out, ASN1_STRING *in)
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{
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unsigned char *to, *from;
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int len, i;
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/* If type not in bitmask just copy string across */
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if (!(ASN1_tag2bit(in->type) & ASN1_MASK_CANON)) {
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if (!ASN1_STRING_copy(out, in))
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return 0;
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return 1;
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}
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out->type = V_ASN1_UTF8STRING;
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out->length = ASN1_STRING_to_UTF8(&out->data, in);
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if (out->length == -1)
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return 0;
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to = out->data;
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from = to;
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len = out->length;
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/*
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* Convert string in place to canonical form. Ultimately we may need to
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* handle a wider range of characters but for now ignore anything with
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* MSB set and rely on the isspace() and tolower() functions.
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*/
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/* Ignore leading spaces */
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while ((len > 0) && !(*from & 0x80) && isspace(*from)) {
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from++;
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len--;
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}
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to = from + len - 1;
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/* Ignore trailing spaces */
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while ((len > 0) && !(*to & 0x80) && isspace(*to)) {
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to--;
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len--;
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}
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|
|
|
to = out->data;
|
|
|
|
i = 0;
|
|
while (i < len) {
|
|
/* If MSB set just copy across */
|
|
if (*from & 0x80) {
|
|
*to++ = *from++;
|
|
i++;
|
|
}
|
|
/* Collapse multiple spaces */
|
|
else if (isspace(*from)) {
|
|
/* Copy one space across */
|
|
*to++ = ' ';
|
|
/*
|
|
* Ignore subsequent spaces. Note: don't need to check len here
|
|
* because we know the last character is a non-space so we can't
|
|
* overflow.
|
|
*/
|
|
do {
|
|
from++;
|
|
i++;
|
|
}
|
|
while (!(*from & 0x80) && isspace(*from));
|
|
} else {
|
|
*to++ = tolower(*from);
|
|
from++;
|
|
i++;
|
|
}
|
|
}
|
|
|
|
out->length = to - out->data;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
static int i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) * _intname,
|
|
unsigned char **in)
|
|
{
|
|
int i, len, ltmp;
|
|
ASN1_VALUE *v;
|
|
STACK_OF(ASN1_VALUE) *intname = (STACK_OF(ASN1_VALUE) *)_intname;
|
|
|
|
len = 0;
|
|
for (i = 0; i < sk_ASN1_VALUE_num(intname); i++) {
|
|
v = sk_ASN1_VALUE_value(intname, i);
|
|
ltmp = ASN1_item_ex_i2d(&v, in,
|
|
ASN1_ITEM_rptr(X509_NAME_ENTRIES), -1, -1);
|
|
if (ltmp < 0)
|
|
return ltmp;
|
|
len += ltmp;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
|
|
{
|
|
if ((name = X509_NAME_dup(name)) == NULL)
|
|
return 0;
|
|
X509_NAME_free(*xn);
|
|
*xn = name;
|
|
return 1;
|
|
}
|
|
|
|
IMPLEMENT_STACK_OF(X509_NAME_ENTRY)
|
|
|
|
IMPLEMENT_ASN1_SET_OF(X509_NAME_ENTRY)
|