448 lines
11 KiB
C
Executable File
448 lines
11 KiB
C
Executable File
/* $OpenBSD: a_mbstr.c,v 1.24 2021/12/25 13:17:48 jsing Exp $ */
|
|
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
|
|
* project 1999.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <openssl/asn1.h>
|
|
#include <openssl/err.h>
|
|
|
|
#include "asn1_locl.h"
|
|
|
|
static int traverse_string(const unsigned char *p, int len, int inform,
|
|
int (*rfunc)(unsigned long value, void *in), void *arg);
|
|
static int in_utf8(unsigned long value, void *arg);
|
|
static int out_utf8(unsigned long value, void *arg);
|
|
static int type_str(unsigned long value, void *arg);
|
|
static int cpy_asc(unsigned long value, void *arg);
|
|
static int cpy_bmp(unsigned long value, void *arg);
|
|
static int cpy_univ(unsigned long value, void *arg);
|
|
static int cpy_utf8(unsigned long value, void *arg);
|
|
static int is_printable(unsigned long value);
|
|
|
|
/* These functions take a string in UTF8, ASCII or multibyte form and
|
|
* a mask of permissible ASN1 string types. It then works out the minimal
|
|
* type (using the order Printable < IA5 < T61 < BMP < Universal < UTF8)
|
|
* and creates a string of the correct type with the supplied data.
|
|
* Yes this is horrible: it has to be :-(
|
|
* The 'ncopy' form checks minimum and maximum size limits too.
|
|
*/
|
|
|
|
int
|
|
ASN1_mbstring_copy(ASN1_STRING **out, const unsigned char *in, int len,
|
|
int inform, unsigned long mask)
|
|
{
|
|
return ASN1_mbstring_ncopy(out, in, len, inform, mask, 0, 0);
|
|
}
|
|
|
|
int
|
|
ASN1_mbstring_ncopy(ASN1_STRING **out, const unsigned char *in, int len,
|
|
int inform, unsigned long mask, long minsize, long maxsize)
|
|
{
|
|
int str_type;
|
|
int ret;
|
|
char free_out;
|
|
int outform, outlen = 0;
|
|
ASN1_STRING *dest;
|
|
unsigned char *p;
|
|
int nchar;
|
|
int (*cpyfunc)(unsigned long, void *) = NULL;
|
|
|
|
if (len < 0)
|
|
len = strlen((const char *)in);
|
|
if (!mask)
|
|
mask = DIRSTRING_TYPE;
|
|
|
|
/* First do a string check and work out the number of characters */
|
|
switch (inform) {
|
|
case MBSTRING_BMP:
|
|
if (len & 1) {
|
|
ASN1error(ASN1_R_INVALID_BMPSTRING_LENGTH);
|
|
return -1;
|
|
}
|
|
nchar = len >> 1;
|
|
break;
|
|
|
|
case MBSTRING_UNIV:
|
|
if (len & 3) {
|
|
ASN1error(ASN1_R_INVALID_UNIVERSALSTRING_LENGTH);
|
|
return -1;
|
|
}
|
|
nchar = len >> 2;
|
|
break;
|
|
|
|
case MBSTRING_UTF8:
|
|
nchar = 0;
|
|
/* This counts the characters and does utf8 syntax checking */
|
|
ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar);
|
|
if (ret < 0) {
|
|
ASN1error(ASN1_R_INVALID_UTF8STRING);
|
|
return -1;
|
|
}
|
|
break;
|
|
|
|
case MBSTRING_ASC:
|
|
nchar = len;
|
|
break;
|
|
|
|
default:
|
|
ASN1error(ASN1_R_UNKNOWN_FORMAT);
|
|
return -1;
|
|
}
|
|
|
|
if ((minsize > 0) && (nchar < minsize)) {
|
|
ASN1error(ASN1_R_STRING_TOO_SHORT);
|
|
ERR_asprintf_error_data("minsize=%ld", minsize);
|
|
return -1;
|
|
}
|
|
|
|
if ((maxsize > 0) && (nchar > maxsize)) {
|
|
ASN1error(ASN1_R_STRING_TOO_LONG);
|
|
ERR_asprintf_error_data("maxsize=%ld", maxsize);
|
|
return -1;
|
|
}
|
|
|
|
/* Now work out minimal type (if any) */
|
|
if (traverse_string(in, len, inform, type_str, &mask) < 0) {
|
|
ASN1error(ASN1_R_ILLEGAL_CHARACTERS);
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* Now work out output format and string type */
|
|
outform = MBSTRING_ASC;
|
|
if (mask & B_ASN1_PRINTABLESTRING)
|
|
str_type = V_ASN1_PRINTABLESTRING;
|
|
else if (mask & B_ASN1_IA5STRING)
|
|
str_type = V_ASN1_IA5STRING;
|
|
else if (mask & B_ASN1_T61STRING)
|
|
str_type = V_ASN1_T61STRING;
|
|
else if (mask & B_ASN1_BMPSTRING) {
|
|
str_type = V_ASN1_BMPSTRING;
|
|
outform = MBSTRING_BMP;
|
|
} else if (mask & B_ASN1_UNIVERSALSTRING) {
|
|
str_type = V_ASN1_UNIVERSALSTRING;
|
|
outform = MBSTRING_UNIV;
|
|
} else {
|
|
str_type = V_ASN1_UTF8STRING;
|
|
outform = MBSTRING_UTF8;
|
|
}
|
|
if (!out)
|
|
return str_type;
|
|
if (*out) {
|
|
free_out = 0;
|
|
dest = *out;
|
|
if (dest->data) {
|
|
dest->length = 0;
|
|
free(dest->data);
|
|
dest->data = NULL;
|
|
}
|
|
dest->type = str_type;
|
|
} else {
|
|
free_out = 1;
|
|
dest = ASN1_STRING_type_new(str_type);
|
|
if (!dest) {
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
|
return -1;
|
|
}
|
|
*out = dest;
|
|
}
|
|
/* If both the same type just copy across */
|
|
if (inform == outform) {
|
|
if (!ASN1_STRING_set(dest, in, len)) {
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
return str_type;
|
|
}
|
|
|
|
/* Work out how much space the destination will need */
|
|
switch (outform) {
|
|
case MBSTRING_ASC:
|
|
outlen = nchar;
|
|
cpyfunc = cpy_asc;
|
|
break;
|
|
|
|
case MBSTRING_BMP:
|
|
outlen = nchar << 1;
|
|
cpyfunc = cpy_bmp;
|
|
break;
|
|
|
|
case MBSTRING_UNIV:
|
|
outlen = nchar << 2;
|
|
cpyfunc = cpy_univ;
|
|
break;
|
|
|
|
case MBSTRING_UTF8:
|
|
outlen = 0;
|
|
if (traverse_string(in, len, inform, out_utf8, &outlen) < 0) {
|
|
ASN1error(ASN1_R_ILLEGAL_CHARACTERS);
|
|
goto err;
|
|
}
|
|
cpyfunc = cpy_utf8;
|
|
break;
|
|
}
|
|
if (!(p = malloc(outlen + 1))) {
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
dest->length = outlen;
|
|
dest->data = p;
|
|
p[outlen] = 0;
|
|
traverse_string(in, len, inform, cpyfunc, &p);
|
|
return str_type;
|
|
|
|
err:
|
|
if (free_out) {
|
|
ASN1_STRING_free(dest);
|
|
*out = NULL;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* This function traverses a string and passes the value of each character
|
|
* to an optional function along with a void * argument.
|
|
*/
|
|
|
|
static int
|
|
traverse_string(const unsigned char *p, int len, int inform,
|
|
int (*rfunc)(unsigned long value, void *in), void *arg)
|
|
{
|
|
unsigned long value;
|
|
int ret;
|
|
|
|
while (len) {
|
|
switch (inform) {
|
|
case MBSTRING_ASC:
|
|
value = *p++;
|
|
len--;
|
|
break;
|
|
case MBSTRING_BMP:
|
|
value = *p++ << 8;
|
|
value |= *p++;
|
|
/* BMP is explictly defined to not support surrogates */
|
|
if (UNICODE_IS_SURROGATE(value))
|
|
return -1;
|
|
len -= 2;
|
|
break;
|
|
case MBSTRING_UNIV:
|
|
value = (unsigned long)*p++ << 24;
|
|
value |= *p++ << 16;
|
|
value |= *p++ << 8;
|
|
value |= *p++;
|
|
if (value > UNICODE_MAX || UNICODE_IS_SURROGATE(value))
|
|
return -1;
|
|
len -= 4;
|
|
break;
|
|
default:
|
|
ret = UTF8_getc(p, len, &value);
|
|
if (ret < 0)
|
|
return -1;
|
|
len -= ret;
|
|
p += ret;
|
|
break;
|
|
}
|
|
if (rfunc) {
|
|
ret = rfunc(value, arg);
|
|
if (ret <= 0)
|
|
return ret;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Various utility functions for traverse_string */
|
|
|
|
/* Just count number of characters */
|
|
|
|
static int
|
|
in_utf8(unsigned long value, void *arg)
|
|
{
|
|
int *nchar;
|
|
|
|
nchar = arg;
|
|
(*nchar)++;
|
|
return 1;
|
|
}
|
|
|
|
/* Determine size of output as a UTF8 String */
|
|
|
|
static int
|
|
out_utf8(unsigned long value, void *arg)
|
|
{
|
|
int *outlen;
|
|
int ret;
|
|
|
|
outlen = arg;
|
|
ret = UTF8_putc(NULL, -1, value);
|
|
if (ret < 0)
|
|
return ret;
|
|
*outlen += ret;
|
|
return 1;
|
|
}
|
|
|
|
/* Determine the "type" of a string: check each character against a
|
|
* supplied "mask".
|
|
*/
|
|
|
|
static int
|
|
type_str(unsigned long value, void *arg)
|
|
{
|
|
unsigned long types;
|
|
|
|
types = *((unsigned long *)arg);
|
|
if ((types & B_ASN1_PRINTABLESTRING) && !is_printable(value))
|
|
types &= ~B_ASN1_PRINTABLESTRING;
|
|
if ((types & B_ASN1_IA5STRING) && (value > 127))
|
|
types &= ~B_ASN1_IA5STRING;
|
|
if ((types & B_ASN1_T61STRING) && (value > 0xff))
|
|
types &= ~B_ASN1_T61STRING;
|
|
if ((types & B_ASN1_BMPSTRING) && (value > 0xffff))
|
|
types &= ~B_ASN1_BMPSTRING;
|
|
if (!types)
|
|
return -1;
|
|
*((unsigned long *)arg) = types;
|
|
return 1;
|
|
}
|
|
|
|
/* Copy one byte per character ASCII like strings */
|
|
|
|
static int
|
|
cpy_asc(unsigned long value, void *arg)
|
|
{
|
|
unsigned char **p, *q;
|
|
|
|
p = arg;
|
|
q = *p;
|
|
*q = value;
|
|
(*p)++;
|
|
return 1;
|
|
}
|
|
|
|
/* Copy two byte per character BMPStrings */
|
|
|
|
static int
|
|
cpy_bmp(unsigned long value, void *arg)
|
|
{
|
|
unsigned char **p, *q;
|
|
|
|
p = arg;
|
|
q = *p;
|
|
*q++ = (value >> 8) & 0xff;
|
|
*q = value & 0xff;
|
|
*p += 2;
|
|
return 1;
|
|
}
|
|
|
|
/* Copy four byte per character UniversalStrings */
|
|
|
|
static int
|
|
cpy_univ(unsigned long value, void *arg)
|
|
{
|
|
unsigned char **p, *q;
|
|
|
|
p = arg;
|
|
q = *p;
|
|
*q++ = (value >> 24) & 0xff;
|
|
*q++ = (value >> 16) & 0xff;
|
|
*q++ = (value >> 8) & 0xff;
|
|
*q = value & 0xff;
|
|
*p += 4;
|
|
return 1;
|
|
}
|
|
|
|
/* Copy to a UTF8String */
|
|
|
|
static int
|
|
cpy_utf8(unsigned long value, void *arg)
|
|
{
|
|
unsigned char **p;
|
|
|
|
int ret;
|
|
p = arg;
|
|
/* We already know there is enough room so pass 0xff as the length */
|
|
ret = UTF8_putc(*p, 0xff, value);
|
|
*p += ret;
|
|
return 1;
|
|
}
|
|
|
|
/* Return 1 if the character is permitted in a PrintableString */
|
|
static int
|
|
is_printable(unsigned long value)
|
|
{
|
|
int ch;
|
|
|
|
if (value > 0x7f)
|
|
return 0;
|
|
ch = (int)value;
|
|
|
|
/* Note: we can't use 'isalnum' because certain accented
|
|
* characters may count as alphanumeric in some environments.
|
|
*/
|
|
if ((ch >= 'a') && (ch <= 'z'))
|
|
return 1;
|
|
if ((ch >= 'A') && (ch <= 'Z'))
|
|
return 1;
|
|
if ((ch >= '0') && (ch <= '9'))
|
|
return 1;
|
|
if ((ch == ' ') || strchr("'()+,-./:=?", ch))
|
|
return 1;
|
|
return 0;
|
|
}
|