pineapple-src/externals/libressl/crypto/asn1/a_string.c
2022-04-24 22:29:35 +02:00

423 lines
9 KiB
C
Executable file

/* $OpenBSD: a_string.c,v 1.7 2022/03/17 17:17:58 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* 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 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 acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS 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 AUTHOR OR 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/asn1.h>
#include <openssl/err.h>
#include "asn1_locl.h"
ASN1_STRING *
ASN1_STRING_new(void)
{
return ASN1_STRING_type_new(V_ASN1_OCTET_STRING);
}
ASN1_STRING *
ASN1_STRING_type_new(int type)
{
ASN1_STRING *astr;
if ((astr = calloc(1, sizeof(ASN1_STRING))) == NULL) {
ASN1error(ERR_R_MALLOC_FAILURE);
return NULL;
}
astr->type = type;
return astr;
}
static void
ASN1_STRING_clear(ASN1_STRING *astr)
{
if (!(astr->flags & ASN1_STRING_FLAG_NDEF))
freezero(astr->data, astr->length);
astr->flags &= ~ASN1_STRING_FLAG_NDEF;
astr->data = NULL;
astr->length = 0;
}
void
ASN1_STRING_free(ASN1_STRING *astr)
{
if (astr == NULL)
return;
ASN1_STRING_clear(astr);
free(astr);
}
int
ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
{
int cmp;
if (a == NULL || b == NULL)
return -1;
if ((cmp = (a->length - b->length)) != 0)
return cmp;
if ((cmp = memcmp(a->data, b->data, a->length)) != 0)
return cmp;
return (a->type - b->type);
}
int
ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *src)
{
if (src == NULL)
return 0;
if (!ASN1_STRING_set(dst, src->data, src->length))
return 0;
dst->type = src->type;
dst->flags = src->flags & ~ASN1_STRING_FLAG_NDEF;
return 1;
}
ASN1_STRING *
ASN1_STRING_dup(const ASN1_STRING *src)
{
ASN1_STRING *astr;
if (src == NULL)
return NULL;
if ((astr = ASN1_STRING_new()) == NULL)
return NULL;
if (!ASN1_STRING_copy(astr, src)) {
ASN1_STRING_free(astr);
return NULL;
}
return astr;
}
int
ASN1_STRING_set(ASN1_STRING *astr, const void *_data, int len)
{
const char *data = _data;
if (len == -1) {
size_t slen;
if (data == NULL)
return 0;
if ((slen = strlen(data)) > INT_MAX)
return 0;
len = (int)slen;
}
ASN1_STRING_clear(astr);
if (len < 0 || len >= INT_MAX)
return 0;
if ((astr->data = calloc(1, len + 1)) == NULL) {
ASN1error(ERR_R_MALLOC_FAILURE);
return (0);
}
astr->length = len;
if (data != NULL) {
memcpy(astr->data, data, len);
astr->data[len] = '\0';
}
return 1;
}
void
ASN1_STRING_set0(ASN1_STRING *astr, void *data, int len)
{
ASN1_STRING_clear(astr);
astr->data = data;
astr->length = len;
}
void
asn1_add_error(const unsigned char *address, int offset)
{
ERR_asprintf_error_data("offset=%d", offset);
}
int
ASN1_STRING_length(const ASN1_STRING *astr)
{
return astr->length;
}
void
ASN1_STRING_length_set(ASN1_STRING *astr, int len)
{
/* This is dangerous and unfixable. */
astr->length = len;
}
int
ASN1_STRING_type(const ASN1_STRING *astr)
{
return astr->type;
}
unsigned char *
ASN1_STRING_data(ASN1_STRING *astr)
{
return astr->data;
}
const unsigned char *
ASN1_STRING_get0_data(const ASN1_STRING *astr)
{
return astr->data;
}
int
ASN1_STRING_print(BIO *bp, const ASN1_STRING *astr)
{
int i, n;
char buf[80];
const char *p;
if (astr == NULL)
return 0;
n = 0;
p = (const char *)astr->data;
for (i = 0; i < astr->length; i++) {
if ((p[i] > '~') || ((p[i] < ' ') &&
(p[i] != '\n') && (p[i] != '\r')))
buf[n] = '.';
else
buf[n] = p[i];
n++;
if (n >= 80) {
if (BIO_write(bp, buf, n) <= 0)
return 0;
n = 0;
}
}
if (n > 0) {
if (BIO_write(bp, buf, n) <= 0)
return 0;
}
return 1;
}
/*
* Utility function: convert any string type to UTF8, returns number of bytes
* in output string or a negative error code
*/
int
ASN1_STRING_to_UTF8(unsigned char **out, const ASN1_STRING *in)
{
ASN1_STRING stmp, *str = &stmp;
int mbflag, ret;
if (in == NULL)
return -1;
if ((mbflag = asn1_tag2charwidth(in->type)) == -1)
return -1;
mbflag |= MBSTRING_FLAG;
stmp.data = NULL;
stmp.length = 0;
ret = ASN1_mbstring_copy(&str, in->data, in->length, mbflag,
B_ASN1_UTF8STRING);
if (ret < 0)
return ret;
*out = stmp.data;
return stmp.length;
}
int
i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *astr, int type)
{
int i, n = 0;
static const char h[] = "0123456789ABCDEF";
char buf[2];
if (astr == NULL)
return 0;
if (astr->length == 0) {
if (BIO_write(bp, "0", 1) != 1)
goto err;
n = 1;
} else {
for (i = 0; i < astr->length; i++) {
if ((i != 0) && (i % 35 == 0)) {
if (BIO_write(bp, "\\\n", 2) != 2)
goto err;
n += 2;
}
buf[0] = h[((unsigned char)astr->data[i] >> 4) & 0x0f];
buf[1] = h[((unsigned char)astr->data[i]) & 0x0f];
if (BIO_write(bp, buf, 2) != 2)
goto err;
n += 2;
}
}
return n;
err:
return -1;
}
int
a2i_ASN1_STRING(BIO *bp, ASN1_STRING *astr, char *buf, int size)
{
int ret = 0;
int i, j, k, m, n, again, bufsize;
unsigned char *s = NULL, *sp;
unsigned char *bufp;
int first = 1;
size_t num = 0, slen = 0;
bufsize = BIO_gets(bp, buf, size);
for (;;) {
if (bufsize < 1) {
if (first)
break;
else
goto err_sl;
}
first = 0;
i = bufsize;
if (buf[i-1] == '\n')
buf[--i] = '\0';
if (i == 0)
goto err_sl;
if (buf[i-1] == '\r')
buf[--i] = '\0';
if (i == 0)
goto err_sl;
if (buf[i - 1] == '\\') {
i--;
again = 1;
} else
again = 0;
buf[i] = '\0';
if (i < 2)
goto err_sl;
bufp = (unsigned char *)buf;
k = 0;
if (i % 2 != 0) {
ASN1error(ASN1_R_ODD_NUMBER_OF_CHARS);
goto err;
}
i /= 2;
if (num + i > slen) {
sp = realloc(s, num + i);
if (sp == NULL) {
ASN1error(ERR_R_MALLOC_FAILURE);
goto err;
}
s = sp;
slen = num + i;
}
for (j = 0; j < i; j++, k += 2) {
for (n = 0; n < 2; n++) {
m = bufp[k + n];
if ((m >= '0') && (m <= '9'))
m -= '0';
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;
}