661 lines
14 KiB
C
Executable File
661 lines
14 KiB
C
Executable File
/* $OpenBSD: a_object.c,v 1.46 2022/04/10 12:42:33 inoguchi Exp $ */
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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 <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <openssl/asn1.h>
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#include <openssl/asn1t.h>
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#include <openssl/err.h>
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#include <openssl/buffer.h>
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#include <openssl/objects.h>
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#include "asn1_locl.h"
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const ASN1_ITEM ASN1_OBJECT_it = {
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.itype = ASN1_ITYPE_PRIMITIVE,
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.utype = V_ASN1_OBJECT,
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.sname = "ASN1_OBJECT",
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};
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ASN1_OBJECT *
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ASN1_OBJECT_new(void)
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{
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ASN1_OBJECT *a;
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if ((a = calloc(1, sizeof(ASN1_OBJECT))) == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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a->flags = ASN1_OBJECT_FLAG_DYNAMIC;
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return a;
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}
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void
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ASN1_OBJECT_free(ASN1_OBJECT *a)
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{
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if (a == NULL)
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return;
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
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free((void *)a->sn);
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free((void *)a->ln);
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a->sn = a->ln = NULL;
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}
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
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freezero((void *)a->data, a->length);
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a->data = NULL;
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a->length = 0;
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}
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
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free(a);
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}
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ASN1_OBJECT *
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ASN1_OBJECT_create(int nid, unsigned char *data, int len,
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const char *sn, const char *ln)
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{
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ASN1_OBJECT o;
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o.sn = sn;
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o.ln = ln;
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o.data = data;
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o.nid = nid;
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o.length = len;
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o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
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ASN1_OBJECT_FLAG_DYNAMIC_DATA;
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return (OBJ_dup(&o));
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}
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static int
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oid_add_arc(CBB *cbb, uint64_t arc)
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{
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int started = 0;
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uint8_t val;
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int i;
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for (i = (sizeof(arc) * 8) / 7; i >= 0; i--) {
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val = (arc >> (i * 7)) & 0x7f;
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if (!started && i != 0 && val == 0)
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continue;
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if (i > 0)
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val |= 0x80;
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if (!CBB_add_u8(cbb, val))
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return 0;
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started = 1;
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}
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return 1;
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}
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static int
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oid_parse_arc(CBS *cbs, uint64_t *out_arc)
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{
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uint64_t arc = 0;
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uint8_t val;
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do {
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if (!CBS_get_u8(cbs, &val))
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return 0;
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if (arc == 0 && val == 0x80)
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return 0;
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if (out_arc != NULL && arc > (UINT64_MAX >> 7))
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return 0;
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arc = (arc << 7) | (val & 0x7f);
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} while (val & 0x80);
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if (out_arc != NULL)
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*out_arc = arc;
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return 1;
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}
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static int
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oid_add_arc_txt(CBB *cbb, uint64_t arc, int first)
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{
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const char *fmt = ".%llu";
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char s[22]; /* Digits in decimal representation of 2^64-1, plus '.' and NUL. */
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int n;
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if (first)
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fmt = "%llu";
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n = snprintf(s, sizeof(s), fmt, (unsigned long long)arc);
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if (n < 0 || (size_t)n >= sizeof(s))
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return 0;
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if (!CBB_add_bytes(cbb, s, n))
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return 0;
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return 1;
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}
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static int
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oid_parse_arc_txt(CBS *cbs, uint64_t *out_arc, char *separator, int first)
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{
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uint64_t arc = 0;
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int digits = 0;
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uint8_t val;
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if (!first) {
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if (!CBS_get_u8(cbs, &val))
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return 0;
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if ((*separator == 0 && val != '.' && val != ' ') ||
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(*separator != 0 && val != *separator)) {
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ASN1error(ASN1_R_INVALID_SEPARATOR);
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return 0;
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}
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*separator = val;
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}
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while (CBS_len(cbs) > 0) {
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if (!CBS_peek_u8(cbs, &val))
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return 0;
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if (val == '.' || val == ' ')
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break;
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if (!CBS_get_u8(cbs, &val))
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return 0;
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if (val < '0' || val > '9') {
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/* For the first arc we treat this as the separator. */
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if (first) {
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ASN1error(ASN1_R_INVALID_SEPARATOR);
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return 0;
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}
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ASN1error(ASN1_R_INVALID_DIGIT);
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return 0;
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}
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val -= '0';
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if (digits > 0 && arc == 0 && val == 0) {
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ASN1error(ASN1_R_INVALID_NUMBER);
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return 0;
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}
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digits++;
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if (arc > UINT64_MAX / 10) {
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ASN1error(ASN1_R_TOO_LONG);
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return 0;
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}
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arc = arc * 10 + val;
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}
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if (digits < 1) {
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ASN1error(ASN1_R_INVALID_NUMBER);
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return 0;
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}
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*out_arc = arc;
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return 1;
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}
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static int
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a2c_ASN1_OBJECT_internal(CBB *cbb, CBS *cbs)
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{
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uint64_t arc, si1, si2;
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char separator = 0;
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if (!oid_parse_arc_txt(cbs, &si1, &separator, 1))
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return 0;
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if (CBS_len(cbs) == 0) {
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ASN1error(ASN1_R_MISSING_SECOND_NUMBER);
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return 0;
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}
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if (!oid_parse_arc_txt(cbs, &si2, &separator, 0))
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return 0;
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/*
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* X.690 section 8.19 - the first two subidentifiers are encoded as
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* (x * 40) + y, with x being limited to [0,1,2]. The second
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* subidentifier cannot exceed 39 for x < 2.
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*/
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if (si1 > 2) {
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ASN1error(ASN1_R_FIRST_NUM_TOO_LARGE);
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return 0;
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}
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if ((si1 < 2 && si2 >= 40) || si2 > UINT64_MAX - si1 * 40) {
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ASN1error(ASN1_R_SECOND_NUMBER_TOO_LARGE);
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return 0;
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}
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arc = si1 * 40 + si2;
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if (!oid_add_arc(cbb, arc))
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return 0;
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while (CBS_len(cbs) > 0) {
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if (!oid_parse_arc_txt(cbs, &arc, &separator, 0))
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return 0;
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if (!oid_add_arc(cbb, arc))
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return 0;
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}
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return 1;
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}
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static int
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c2a_ASN1_OBJECT(CBS *cbs, CBB *cbb)
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{
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uint64_t arc, si1, si2;
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/*
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* X.690 section 8.19 - the first two subidentifiers are encoded as
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* (x * 40) + y, with x being limited to [0,1,2].
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*/
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if (!oid_parse_arc(cbs, &arc))
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return 0;
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if ((si1 = arc / 40) > 2)
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si1 = 2;
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si2 = arc - si1 * 40;
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if (!oid_add_arc_txt(cbb, si1, 1))
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return 0;
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if (!oid_add_arc_txt(cbb, si2, 0))
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return 0;
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while (CBS_len(cbs) > 0) {
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if (!oid_parse_arc(cbs, &arc))
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return 0;
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if (!oid_add_arc_txt(cbb, arc, 0))
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return 0;
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}
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/* NUL terminate. */
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if (!CBB_add_u8(cbb, 0))
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return 0;
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return 1;
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}
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int
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a2d_ASN1_OBJECT(unsigned char *out, int out_len, const char *in, int in_len)
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{
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uint8_t *data = NULL;
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size_t data_len;
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CBS cbs;
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CBB cbb;
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int ret = 0;
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memset(&cbb, 0, sizeof(cbb));
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if (in_len == -1)
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in_len = strlen(in);
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if (in_len <= 0)
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goto err;
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CBS_init(&cbs, in, in_len);
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if (!CBB_init(&cbb, 0))
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goto err;
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if (!a2c_ASN1_OBJECT_internal(&cbb, &cbs))
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goto err;
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if (!CBB_finish(&cbb, &data, &data_len))
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goto err;
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if (data_len > INT_MAX)
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goto err;
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if (out != NULL) {
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if (out_len <= 0 || (size_t)out_len < data_len) {
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ASN1error(ASN1_R_BUFFER_TOO_SMALL);
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goto err;
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}
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memcpy(out, data, data_len);
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}
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ret = (int)data_len;
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err:
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CBB_cleanup(&cbb);
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free(data);
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return ret;
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}
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static int
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i2t_ASN1_OBJECT_oid(const ASN1_OBJECT *aobj, CBB *cbb)
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{
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CBS cbs;
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CBS_init(&cbs, aobj->data, aobj->length);
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return c2a_ASN1_OBJECT(&cbs, cbb);
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}
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static int
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i2t_ASN1_OBJECT_name(const ASN1_OBJECT *aobj, CBB *cbb, const char **out_name)
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{
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const char *name;
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int nid;
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*out_name = NULL;
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if ((nid = OBJ_obj2nid(aobj)) == NID_undef)
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return 0;
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if ((name = OBJ_nid2ln(nid)) == NULL)
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name = OBJ_nid2sn(nid);
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if (name == NULL)
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return 0;
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*out_name = name;
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if (!CBB_add_bytes(cbb, name, strlen(name)))
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return 0;
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/* NUL terminate. */
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if (!CBB_add_u8(cbb, 0))
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return 0;
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return 1;
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}
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static int
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i2t_ASN1_OBJECT_cbb(const ASN1_OBJECT *aobj, CBB *cbb, int no_name)
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{
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const char *name;
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if (!no_name) {
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if (i2t_ASN1_OBJECT_name(aobj, cbb, &name))
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return 1;
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if (name != NULL)
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return 0;
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}
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return i2t_ASN1_OBJECT_oid(aobj, cbb);
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}
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int
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i2t_ASN1_OBJECT_internal(const ASN1_OBJECT *aobj, char *buf, int buf_len, int no_name)
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{
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uint8_t *data = NULL;
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size_t data_len;
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CBB cbb;
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int ret = 0;
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if (buf_len < 0)
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return 0;
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if (buf_len > 0)
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buf[0] = '\0';
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if (!CBB_init(&cbb, 0))
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goto err;
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if (!i2t_ASN1_OBJECT_cbb(aobj, &cbb, no_name))
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goto err;
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if (!CBB_finish(&cbb, &data, &data_len))
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goto err;
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ret = strlcpy(buf, data, buf_len);
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err:
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CBB_cleanup(&cbb);
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free(data);
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return ret;
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}
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int
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i2t_ASN1_OBJECT(char *buf, int buf_len, const ASN1_OBJECT *aobj)
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{
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return i2t_ASN1_OBJECT_internal(aobj, buf, buf_len, 0);
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}
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ASN1_OBJECT *
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t2i_ASN1_OBJECT_internal(const char *oid)
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{
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ASN1_OBJECT *aobj = NULL;
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uint8_t *data = NULL;
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size_t data_len;
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CBB cbb;
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CBS cbs;
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memset(&cbb, 0, sizeof(cbb));
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CBS_init(&cbs, oid, strlen(oid));
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if (!CBB_init(&cbb, 0))
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goto err;
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if (!a2c_ASN1_OBJECT_internal(&cbb, &cbs))
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goto err;
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if (!CBB_finish(&cbb, &data, &data_len))
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goto err;
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if (data_len > INT_MAX)
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goto err;
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if ((aobj = ASN1_OBJECT_new()) == NULL)
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goto err;
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aobj->data = data;
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aobj->length = (int)data_len;
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aobj->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
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data = NULL;
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err:
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CBB_cleanup(&cbb);
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free(data);
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return aobj;
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}
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int
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i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *aobj)
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{
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uint8_t *data = NULL;
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size_t data_len;
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CBB cbb;
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int ret = -1;
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if (aobj == NULL || aobj->data == NULL)
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return BIO_write(bp, "NULL", 4);
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if (!CBB_init(&cbb, 0))
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goto err;
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if (!i2t_ASN1_OBJECT_cbb(aobj, &cbb, 0)) {
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ret = BIO_write(bp, "<INVALID>", 9);
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goto err;
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}
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if (!CBB_finish(&cbb, &data, &data_len))
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goto err;
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ret = BIO_write(bp, data, strlen(data));
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err:
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CBB_cleanup(&cbb);
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free(data);
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return ret;
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}
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int
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c2i_ASN1_OBJECT_cbs(ASN1_OBJECT **out_aobj, CBS *content)
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{
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ASN1_OBJECT *aobj = NULL;
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uint8_t *data = NULL;
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size_t data_len;
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CBS cbs;
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if (out_aobj == NULL || *out_aobj != NULL)
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goto err;
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/* Parse and validate OID encoding per X.690 8.19.2. */
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CBS_dup(content, &cbs);
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if (CBS_len(&cbs) == 0) {
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ASN1error(ASN1_R_INVALID_OBJECT_ENCODING);
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|
goto err;
|
|
}
|
|
while (CBS_len(&cbs) > 0) {
|
|
if (!oid_parse_arc(&cbs, NULL)) {
|
|
ASN1error(ASN1_R_INVALID_OBJECT_ENCODING);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!CBS_stow(content, &data, &data_len))
|
|
goto err;
|
|
|
|
if (data_len > INT_MAX)
|
|
goto err;
|
|
|
|
if ((aobj = ASN1_OBJECT_new()) == NULL)
|
|
goto err;
|
|
|
|
aobj->data = data;
|
|
aobj->length = (int)data_len; /* XXX - change length to size_t. */
|
|
aobj->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
|
|
|
|
*out_aobj = aobj;
|
|
|
|
return 1;
|
|
|
|
err:
|
|
ASN1_OBJECT_free(aobj);
|
|
free(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
ASN1_OBJECT *
|
|
c2i_ASN1_OBJECT(ASN1_OBJECT **out_aobj, const unsigned char **pp, long len)
|
|
{
|
|
ASN1_OBJECT *aobj = NULL;
|
|
CBS content;
|
|
|
|
if (out_aobj != NULL) {
|
|
ASN1_OBJECT_free(*out_aobj);
|
|
*out_aobj = NULL;
|
|
}
|
|
|
|
if (len < 0) {
|
|
ASN1error(ASN1_R_LENGTH_ERROR);
|
|
return NULL;
|
|
}
|
|
|
|
CBS_init(&content, *pp, len);
|
|
|
|
if (!c2i_ASN1_OBJECT_cbs(&aobj, &content))
|
|
return NULL;
|
|
|
|
*pp = CBS_data(&content);
|
|
|
|
if (out_aobj != NULL)
|
|
*out_aobj = aobj;
|
|
|
|
return aobj;
|
|
}
|
|
|
|
int
|
|
i2d_ASN1_OBJECT(const ASN1_OBJECT *a, unsigned char **pp)
|
|
{
|
|
unsigned char *p;
|
|
int objsize;
|
|
|
|
if ((a == NULL) || (a->data == NULL))
|
|
return (0);
|
|
|
|
objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT);
|
|
if (pp == NULL)
|
|
return objsize;
|
|
|
|
p = *pp;
|
|
ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
|
|
memcpy(p, a->data, a->length);
|
|
p += a->length;
|
|
|
|
*pp = p;
|
|
return (objsize);
|
|
}
|
|
|
|
ASN1_OBJECT *
|
|
d2i_ASN1_OBJECT(ASN1_OBJECT **out_aobj, const unsigned char **pp, long length)
|
|
{
|
|
ASN1_OBJECT *aobj = NULL;
|
|
uint32_t tag_number;
|
|
CBS cbs, content;
|
|
|
|
if (out_aobj != NULL) {
|
|
ASN1_OBJECT_free(*out_aobj);
|
|
*out_aobj = NULL;
|
|
}
|
|
|
|
if (length < 0) {
|
|
ASN1error(ASN1_R_LENGTH_ERROR);
|
|
return NULL;
|
|
}
|
|
|
|
CBS_init(&cbs, *pp, length);
|
|
|
|
if (!asn1_get_primitive(&cbs, 0, &tag_number, &content)) {
|
|
ASN1error(ASN1_R_BAD_OBJECT_HEADER);
|
|
return NULL;
|
|
}
|
|
if (tag_number != V_ASN1_OBJECT) {
|
|
ASN1error(ASN1_R_EXPECTING_AN_OBJECT);
|
|
return NULL;
|
|
}
|
|
|
|
if (!c2i_ASN1_OBJECT_cbs(&aobj, &content))
|
|
return NULL;
|
|
|
|
*pp = CBS_data(&content);
|
|
|
|
if (out_aobj != NULL)
|
|
*out_aobj = aobj;
|
|
|
|
return aobj;
|
|
}
|