424 lines
9 KiB
C
424 lines
9 KiB
C
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/* $OpenBSD: a_string.c,v 1.7 2022/03/17 17:17:58 jsing 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 <stdlib.h>
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#include <string.h>
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#include <openssl/asn1.h>
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#include <openssl/err.h>
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#include "asn1_locl.h"
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ASN1_STRING *
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ASN1_STRING_new(void)
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{
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return ASN1_STRING_type_new(V_ASN1_OCTET_STRING);
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}
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ASN1_STRING *
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ASN1_STRING_type_new(int type)
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{
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ASN1_STRING *astr;
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if ((astr = calloc(1, sizeof(ASN1_STRING))) == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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astr->type = type;
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return astr;
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}
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static void
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ASN1_STRING_clear(ASN1_STRING *astr)
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{
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if (!(astr->flags & ASN1_STRING_FLAG_NDEF))
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freezero(astr->data, astr->length);
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astr->flags &= ~ASN1_STRING_FLAG_NDEF;
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astr->data = NULL;
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astr->length = 0;
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}
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void
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ASN1_STRING_free(ASN1_STRING *astr)
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{
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if (astr == NULL)
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return;
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ASN1_STRING_clear(astr);
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free(astr);
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}
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int
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ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
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{
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int cmp;
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if (a == NULL || b == NULL)
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return -1;
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if ((cmp = (a->length - b->length)) != 0)
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return cmp;
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if ((cmp = memcmp(a->data, b->data, a->length)) != 0)
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return cmp;
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return (a->type - b->type);
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}
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int
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ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *src)
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{
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if (src == NULL)
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return 0;
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if (!ASN1_STRING_set(dst, src->data, src->length))
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return 0;
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dst->type = src->type;
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dst->flags = src->flags & ~ASN1_STRING_FLAG_NDEF;
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return 1;
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}
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ASN1_STRING *
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ASN1_STRING_dup(const ASN1_STRING *src)
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{
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ASN1_STRING *astr;
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if (src == NULL)
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return NULL;
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if ((astr = ASN1_STRING_new()) == NULL)
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return NULL;
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if (!ASN1_STRING_copy(astr, src)) {
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ASN1_STRING_free(astr);
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return NULL;
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}
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return astr;
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}
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int
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ASN1_STRING_set(ASN1_STRING *astr, const void *_data, int len)
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{
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const char *data = _data;
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if (len == -1) {
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size_t slen;
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if (data == NULL)
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return 0;
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if ((slen = strlen(data)) > INT_MAX)
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return 0;
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len = (int)slen;
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}
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ASN1_STRING_clear(astr);
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if (len < 0 || len >= INT_MAX)
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return 0;
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if ((astr->data = calloc(1, len + 1)) == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return (0);
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}
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astr->length = len;
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if (data != NULL) {
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memcpy(astr->data, data, len);
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astr->data[len] = '\0';
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}
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return 1;
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}
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void
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ASN1_STRING_set0(ASN1_STRING *astr, void *data, int len)
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{
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ASN1_STRING_clear(astr);
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astr->data = data;
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astr->length = len;
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}
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void
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asn1_add_error(const unsigned char *address, int offset)
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{
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ERR_asprintf_error_data("offset=%d", offset);
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}
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int
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ASN1_STRING_length(const ASN1_STRING *astr)
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{
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return astr->length;
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}
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void
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ASN1_STRING_length_set(ASN1_STRING *astr, int len)
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{
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/* This is dangerous and unfixable. */
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astr->length = len;
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}
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int
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ASN1_STRING_type(const ASN1_STRING *astr)
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{
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return astr->type;
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}
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unsigned char *
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ASN1_STRING_data(ASN1_STRING *astr)
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{
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return astr->data;
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}
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const unsigned char *
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ASN1_STRING_get0_data(const ASN1_STRING *astr)
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{
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return astr->data;
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}
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int
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ASN1_STRING_print(BIO *bp, const ASN1_STRING *astr)
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{
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int i, n;
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char buf[80];
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const char *p;
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if (astr == NULL)
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return 0;
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n = 0;
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p = (const char *)astr->data;
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for (i = 0; i < astr->length; i++) {
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if ((p[i] > '~') || ((p[i] < ' ') &&
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(p[i] != '\n') && (p[i] != '\r')))
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buf[n] = '.';
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else
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buf[n] = p[i];
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n++;
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if (n >= 80) {
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if (BIO_write(bp, buf, n) <= 0)
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return 0;
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n = 0;
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}
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}
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if (n > 0) {
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if (BIO_write(bp, buf, n) <= 0)
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return 0;
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}
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return 1;
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}
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/*
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* Utility function: convert any string type to UTF8, returns number of bytes
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* in output string or a negative error code
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*/
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int
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ASN1_STRING_to_UTF8(unsigned char **out, const ASN1_STRING *in)
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{
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ASN1_STRING stmp, *str = &stmp;
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int mbflag, ret;
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if (in == NULL)
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return -1;
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if ((mbflag = asn1_tag2charwidth(in->type)) == -1)
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return -1;
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mbflag |= MBSTRING_FLAG;
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stmp.data = NULL;
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stmp.length = 0;
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ret = ASN1_mbstring_copy(&str, in->data, in->length, mbflag,
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B_ASN1_UTF8STRING);
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if (ret < 0)
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return ret;
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*out = stmp.data;
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return stmp.length;
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}
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int
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i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *astr, int type)
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{
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int i, n = 0;
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static const char h[] = "0123456789ABCDEF";
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char buf[2];
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if (astr == NULL)
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return 0;
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if (astr->length == 0) {
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if (BIO_write(bp, "0", 1) != 1)
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goto err;
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n = 1;
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} else {
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for (i = 0; i < astr->length; i++) {
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if ((i != 0) && (i % 35 == 0)) {
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if (BIO_write(bp, "\\\n", 2) != 2)
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goto err;
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n += 2;
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}
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buf[0] = h[((unsigned char)astr->data[i] >> 4) & 0x0f];
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buf[1] = h[((unsigned char)astr->data[i]) & 0x0f];
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if (BIO_write(bp, buf, 2) != 2)
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goto err;
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n += 2;
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}
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}
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return n;
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err:
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return -1;
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}
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int
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a2i_ASN1_STRING(BIO *bp, ASN1_STRING *astr, char *buf, int size)
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{
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int ret = 0;
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int i, j, k, m, n, again, bufsize;
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unsigned char *s = NULL, *sp;
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unsigned char *bufp;
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int first = 1;
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size_t num = 0, slen = 0;
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bufsize = BIO_gets(bp, buf, size);
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for (;;) {
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if (bufsize < 1) {
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if (first)
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break;
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else
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goto err_sl;
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}
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first = 0;
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i = bufsize;
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if (buf[i-1] == '\n')
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buf[--i] = '\0';
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if (i == 0)
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goto err_sl;
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if (buf[i-1] == '\r')
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buf[--i] = '\0';
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if (i == 0)
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goto err_sl;
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if (buf[i - 1] == '\\') {
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i--;
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again = 1;
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} else
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again = 0;
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buf[i] = '\0';
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if (i < 2)
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goto err_sl;
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bufp = (unsigned char *)buf;
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k = 0;
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if (i % 2 != 0) {
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ASN1error(ASN1_R_ODD_NUMBER_OF_CHARS);
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goto err;
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}
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i /= 2;
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if (num + i > slen) {
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sp = realloc(s, num + i);
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if (sp == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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s = sp;
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slen = num + i;
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}
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for (j = 0; j < i; j++, k += 2) {
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for (n = 0; n < 2; n++) {
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m = bufp[k + n];
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if ((m >= '0') && (m <= '9'))
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m -= '0';
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|
else if ((m >= 'a') && (m <= 'f'))
|
||
|
|
m = m - 'a' + 10;
|
||
|
|
else if ((m >= 'A') && (m <= 'F'))
|
||
|
|
m = m - 'A' + 10;
|
||
|
|
else {
|
||
|
|
ASN1error(ASN1_R_NON_HEX_CHARACTERS);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
s[num + j] <<= 4;
|
||
|
|
s[num + j] |= m;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
num += i;
|
||
|
|
if (again)
|
||
|
|
bufsize = BIO_gets(bp, buf, size);
|
||
|
|
else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
astr->length = num;
|
||
|
|
astr->data = s;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
err_sl:
|
||
|
|
ASN1error(ASN1_R_SHORT_LINE);
|
||
|
|
err:
|
||
|
|
free(s);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|