early-access version 2698
This commit is contained in:
pineappleEA
548
externals/libressl/crypto/asn1/asn1_lib.c
vendored
548
externals/libressl/crypto/asn1/asn1_lib.c
vendored
@@ -1,436 +1,202 @@
|
||||
/* $OpenBSD: asn1_lib.c,v 1.44 2018/11/17 09:34:11 tb Exp $ */
|
||||
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
||||
* All rights reserved.
|
||||
/* $OpenBSD: asn1_lib.c,v 1.52 2022/03/26 14:47:58 jsing Exp $ */
|
||||
/*
|
||||
* Copyright (c) 2021 Joel Sing <jsing@openbsd.org>
|
||||
*
|
||||
* This package is an SSL implementation written
|
||||
* by Eric Young (eay@cryptsoft.com).
|
||||
* The implementation was written so as to conform with Netscapes SSL.
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* 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.]
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <limits.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include <openssl/asn1.h>
|
||||
#include <openssl/err.h>
|
||||
|
||||
static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max);
|
||||
static void asn1_put_length(unsigned char **pp, int length);
|
||||
#include "bytestring.h"
|
||||
|
||||
static int
|
||||
_asn1_check_infinite_end(const unsigned char **p, long len)
|
||||
asn1_get_identifier_cbs(CBS *cbs, int der_mode, uint8_t *out_class,
|
||||
int *out_constructed, uint32_t *out_tag_number)
|
||||
{
|
||||
/* If there is 0 or 1 byte left, the length check should pick
|
||||
* things up */
|
||||
if (len <= 0)
|
||||
return (1);
|
||||
else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) {
|
||||
(*p) += 2;
|
||||
return (1);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
uint8_t tag_class, tag_val;
|
||||
int tag_constructed;
|
||||
uint32_t tag_number;
|
||||
|
||||
int
|
||||
ASN1_check_infinite_end(unsigned char **p, long len)
|
||||
{
|
||||
return _asn1_check_infinite_end((const unsigned char **)p, len);
|
||||
}
|
||||
/*
|
||||
* Decode ASN.1 identifier octets - see ITU-T X.690 section 8.1.2.
|
||||
*/
|
||||
|
||||
int
|
||||
ASN1_const_check_infinite_end(const unsigned char **p, long len)
|
||||
{
|
||||
return _asn1_check_infinite_end(p, len);
|
||||
}
|
||||
*out_class = 0;
|
||||
*out_constructed = 0;
|
||||
*out_tag_number = 0;
|
||||
|
||||
int
|
||||
ASN1_get_object(const unsigned char **pp, long *plength, int *ptag,
|
||||
int *pclass, long omax)
|
||||
{
|
||||
int i, ret;
|
||||
long l;
|
||||
const unsigned char *p = *pp;
|
||||
int tag, xclass, inf;
|
||||
long max = omax;
|
||||
if (!CBS_get_u8(cbs, &tag_val))
|
||||
return 0;
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||||
|
||||
if (!max)
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||||
goto err;
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ret = (*p & V_ASN1_CONSTRUCTED);
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xclass = (*p & V_ASN1_PRIVATE);
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i = *p & V_ASN1_PRIMITIVE_TAG;
|
||||
if (i == V_ASN1_PRIMITIVE_TAG) { /* high-tag */
|
||||
p++;
|
||||
if (--max == 0)
|
||||
goto err;
|
||||
l = 0;
|
||||
while (*p & 0x80) {
|
||||
l <<= 7L;
|
||||
l |= *(p++) & 0x7f;
|
||||
if (--max == 0)
|
||||
goto err;
|
||||
if (l > (INT_MAX >> 7L))
|
||||
goto err;
|
||||
}
|
||||
l <<= 7L;
|
||||
l |= *(p++) & 0x7f;
|
||||
tag = (int)l;
|
||||
if (--max == 0)
|
||||
goto err;
|
||||
} else {
|
||||
tag = i;
|
||||
p++;
|
||||
if (--max == 0)
|
||||
goto err;
|
||||
}
|
||||
*ptag = tag;
|
||||
*pclass = xclass;
|
||||
if (!asn1_get_length(&p, &inf, plength, (int)max))
|
||||
goto err;
|
||||
/*
|
||||
* ASN.1 tag class, encoding (primitive or constructed) and tag number
|
||||
* are encoded in one or more identifier octets - the first octet
|
||||
* contains the 2 bit tag class, the 1 bit encoding type and 5 bits
|
||||
* of tag number.
|
||||
*
|
||||
* For tag numbers larger than 30 (0x1e) the 5 bit tag number in the
|
||||
* first octet is set to all ones (0x1f) - the tag number is then
|
||||
* encoded in subsequent octets - each of which have a one bit
|
||||
* continuation flag and 7 bits of tag number in big-endian form.
|
||||
* The encoding should not contain leading zeros but can for BER.
|
||||
*/
|
||||
tag_class = (tag_val >> 6) & 0x3;
|
||||
tag_constructed = (tag_val >> 5) & 0x1;
|
||||
tag_number = tag_val & 0x1f;
|
||||
|
||||
if (inf && !(ret & V_ASN1_CONSTRUCTED))
|
||||
goto err;
|
||||
|
||||
if (*plength > (omax - (p - *pp))) {
|
||||
ASN1error(ASN1_R_TOO_LONG);
|
||||
/* Set this so that even if things are not long enough
|
||||
* the values are set correctly */
|
||||
ret |= 0x80;
|
||||
}
|
||||
*pp = p;
|
||||
return (ret | inf);
|
||||
|
||||
err:
|
||||
ASN1error(ASN1_R_HEADER_TOO_LONG);
|
||||
return (0x80);
|
||||
}
|
||||
|
||||
static int
|
||||
asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max)
|
||||
{
|
||||
const unsigned char *p = *pp;
|
||||
unsigned long ret = 0;
|
||||
unsigned int i;
|
||||
|
||||
if (max-- < 1)
|
||||
return (0);
|
||||
if (*p == 0x80) {
|
||||
*inf = 1;
|
||||
ret = 0;
|
||||
p++;
|
||||
} else {
|
||||
*inf = 0;
|
||||
i = *p & 0x7f;
|
||||
if (*(p++) & 0x80) {
|
||||
if (max < (int)i)
|
||||
return (0);
|
||||
/* skip leading zeroes */
|
||||
while (i && *p == 0) {
|
||||
p++;
|
||||
i--;
|
||||
}
|
||||
if (i > sizeof(long))
|
||||
/* Long form. */
|
||||
if (tag_number == 0x1f) {
|
||||
tag_number = 0;
|
||||
do {
|
||||
if (!CBS_get_u8(cbs, &tag_val))
|
||||
return 0;
|
||||
while (i-- > 0) {
|
||||
ret <<= 8L;
|
||||
ret |= *(p++);
|
||||
}
|
||||
} else
|
||||
ret = i;
|
||||
if (der_mode && tag_number == 0 && tag_val == 0x80)
|
||||
return 0;
|
||||
if (tag_number > (UINT32_MAX >> 7))
|
||||
return 0;
|
||||
tag_number = tag_number << 7 | (tag_val & 0x7f);
|
||||
} while ((tag_val & 0x80) != 0);
|
||||
}
|
||||
if (ret > LONG_MAX)
|
||||
return 0;
|
||||
*pp = p;
|
||||
*rl = (long)ret;
|
||||
return (1);
|
||||
}
|
||||
|
||||
/* class 0 is constructed
|
||||
* constructed == 2 for indefinite length constructed */
|
||||
void
|
||||
ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
|
||||
int xclass)
|
||||
{
|
||||
unsigned char *p = *pp;
|
||||
int i, ttag;
|
||||
*out_class = tag_class;
|
||||
*out_constructed = tag_constructed;
|
||||
*out_tag_number = tag_number;
|
||||
|
||||
i = (constructed) ? V_ASN1_CONSTRUCTED : 0;
|
||||
i |= (xclass & V_ASN1_PRIVATE);
|
||||
if (tag < 31)
|
||||
*(p++) = i | (tag & V_ASN1_PRIMITIVE_TAG);
|
||||
else {
|
||||
*(p++) = i | V_ASN1_PRIMITIVE_TAG;
|
||||
for(i = 0, ttag = tag; ttag > 0; i++)
|
||||
ttag >>= 7;
|
||||
ttag = i;
|
||||
while (i-- > 0) {
|
||||
p[i] = tag & 0x7f;
|
||||
if (i != (ttag - 1))
|
||||
p[i] |= 0x80;
|
||||
tag >>= 7;
|
||||
}
|
||||
p += ttag;
|
||||
}
|
||||
if (constructed == 2)
|
||||
*(p++) = 0x80;
|
||||
else
|
||||
asn1_put_length(&p, length);
|
||||
*pp = p;
|
||||
}
|
||||
|
||||
int
|
||||
ASN1_put_eoc(unsigned char **pp)
|
||||
{
|
||||
unsigned char *p = *pp;
|
||||
|
||||
*p++ = 0;
|
||||
*p++ = 0;
|
||||
*pp = p;
|
||||
return 2;
|
||||
}
|
||||
|
||||
static void
|
||||
asn1_put_length(unsigned char **pp, int length)
|
||||
{
|
||||
unsigned char *p = *pp;
|
||||
|
||||
int i, l;
|
||||
if (length <= 127)
|
||||
*(p++) = (unsigned char)length;
|
||||
else {
|
||||
l = length;
|
||||
for (i = 0; l > 0; i++)
|
||||
l >>= 8;
|
||||
*(p++) = i | 0x80;
|
||||
l = i;
|
||||
while (i-- > 0) {
|
||||
p[i] = length & 0xff;
|
||||
length >>= 8;
|
||||
}
|
||||
p += l;
|
||||
}
|
||||
*pp = p;
|
||||
}
|
||||
|
||||
int
|
||||
ASN1_object_size(int constructed, int length, int tag)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = length;
|
||||
ret++;
|
||||
if (tag >= 31) {
|
||||
while (tag > 0) {
|
||||
tag >>= 7;
|
||||
ret++;
|
||||
}
|
||||
}
|
||||
if (constructed == 2)
|
||||
return ret + 3;
|
||||
ret++;
|
||||
if (length > 127) {
|
||||
while (length > 0) {
|
||||
length >>= 8;
|
||||
ret++;
|
||||
}
|
||||
}
|
||||
return (ret);
|
||||
}
|
||||
|
||||
int
|
||||
ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
|
||||
{
|
||||
if (str == NULL)
|
||||
return 0;
|
||||
dst->type = str->type;
|
||||
if (!ASN1_STRING_set(dst, str->data, str->length))
|
||||
return 0;
|
||||
dst->flags = str->flags;
|
||||
return 1;
|
||||
}
|
||||
|
||||
ASN1_STRING *
|
||||
ASN1_STRING_dup(const ASN1_STRING *str)
|
||||
static int
|
||||
asn1_get_length_cbs(CBS *cbs, int der_mode, int *out_indefinite,
|
||||
uint32_t *out_length)
|
||||
{
|
||||
ASN1_STRING *ret;
|
||||
uint8_t len_bytes;
|
||||
uint32_t length;
|
||||
uint8_t val;
|
||||
|
||||
if (!str)
|
||||
return NULL;
|
||||
ret = ASN1_STRING_new();
|
||||
if (!ret)
|
||||
return NULL;
|
||||
if (!ASN1_STRING_copy(ret, str)) {
|
||||
ASN1_STRING_free(ret);
|
||||
return NULL;
|
||||
/*
|
||||
* Decode ASN.1 length octets - see ITU-T X.690 section 8.1.3.
|
||||
*/
|
||||
|
||||
*out_length = 0;
|
||||
*out_indefinite = 0;
|
||||
|
||||
if (!CBS_get_u8(cbs, &val))
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* Short form - length is encoded in the lower 7 bits of a single byte.
|
||||
*/
|
||||
if (val < 0x80) {
|
||||
*out_length = val;
|
||||
return 1;
|
||||
}
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* Indefinite length - content continues until an End of Content (EOC)
|
||||
* marker is reached. Must be used with constructed encoding.
|
||||
*/
|
||||
if (val == 0x80) {
|
||||
*out_indefinite = 1;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Long form - the lower 7 bits of the first byte specifies the number
|
||||
* of bytes used to encode the length, the following bytes specify the
|
||||
* length in big-endian form. The encoding should not contain leading
|
||||
* zeros but can for BER. A length value of 0x7f is invalid.
|
||||
*/
|
||||
if ((len_bytes = val & 0x7f) == 0x7f)
|
||||
return 0;
|
||||
|
||||
length = 0;
|
||||
|
||||
while (len_bytes-- > 0) {
|
||||
if (!CBS_get_u8(cbs, &val))
|
||||
return 0;
|
||||
if (der_mode && length == 0 && val == 0)
|
||||
return 0;
|
||||
if (length > (UINT32_MAX >> 8))
|
||||
return 0;
|
||||
length = (length << 8) | val;
|
||||
}
|
||||
|
||||
*out_length = length;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
|
||||
asn1_get_object_cbs(CBS *cbs, int der_mode, uint8_t *out_tag_class,
|
||||
int *out_constructed, uint32_t *out_tag_number, int *out_indefinite,
|
||||
uint32_t *out_length)
|
||||
{
|
||||
const char *data = _data;
|
||||
int constructed, indefinite;
|
||||
uint32_t tag_number, length;
|
||||
uint8_t tag_class;
|
||||
|
||||
if (len < 0) {
|
||||
if (data == NULL)
|
||||
return (0);
|
||||
else
|
||||
len = strlen(data);
|
||||
}
|
||||
if ((str->length < len) || (str->data == NULL)) {
|
||||
unsigned char *tmp;
|
||||
tmp = realloc(str->data, len + 1);
|
||||
if (tmp == NULL) {
|
||||
ASN1error(ERR_R_MALLOC_FAILURE);
|
||||
return (0);
|
||||
}
|
||||
str->data = tmp;
|
||||
}
|
||||
str->length = len;
|
||||
if (data != NULL) {
|
||||
memmove(str->data, data, len);
|
||||
}
|
||||
str->data[str->length] = '\0';
|
||||
return (1);
|
||||
}
|
||||
*out_tag_class = 0;
|
||||
*out_constructed = 0;
|
||||
*out_tag_number = 0;
|
||||
*out_indefinite = 0;
|
||||
*out_length = 0;
|
||||
|
||||
void
|
||||
ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
|
||||
{
|
||||
freezero(str->data, str->length);
|
||||
str->data = data;
|
||||
str->length = len;
|
||||
}
|
||||
if (!asn1_get_identifier_cbs(cbs, der_mode, &tag_class, &constructed,
|
||||
&tag_number))
|
||||
return 0;
|
||||
if (!asn1_get_length_cbs(cbs, der_mode, &indefinite, &length))
|
||||
return 0;
|
||||
|
||||
ASN1_STRING *
|
||||
ASN1_STRING_new(void)
|
||||
{
|
||||
return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
|
||||
}
|
||||
/* Indefinite length can only be used with constructed encoding. */
|
||||
if (indefinite && !constructed)
|
||||
return 0;
|
||||
|
||||
ASN1_STRING *
|
||||
ASN1_STRING_type_new(int type)
|
||||
{
|
||||
ASN1_STRING *ret;
|
||||
*out_tag_class = tag_class;
|
||||
*out_constructed = constructed;
|
||||
*out_tag_number = tag_number;
|
||||
*out_indefinite = indefinite;
|
||||
*out_length = length;
|
||||
|
||||
ret = malloc(sizeof(ASN1_STRING));
|
||||
if (ret == NULL) {
|
||||
ASN1error(ERR_R_MALLOC_FAILURE);
|
||||
return (NULL);
|
||||
}
|
||||
ret->length = 0;
|
||||
ret->type = type;
|
||||
ret->data = NULL;
|
||||
ret->flags = 0;
|
||||
return (ret);
|
||||
}
|
||||
|
||||
void
|
||||
ASN1_STRING_free(ASN1_STRING *a)
|
||||
{
|
||||
if (a == NULL)
|
||||
return;
|
||||
if (a->data != NULL && !(a->flags & ASN1_STRING_FLAG_NDEF))
|
||||
freezero(a->data, a->length);
|
||||
free(a);
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
|
||||
asn1_get_primitive(CBS *cbs, int der_mode, uint32_t *out_tag_number,
|
||||
CBS *out_content)
|
||||
{
|
||||
int i;
|
||||
int constructed, indefinite;
|
||||
uint32_t tag_number, length;
|
||||
uint8_t tag_class;
|
||||
|
||||
i = (a->length - b->length);
|
||||
if (i == 0) {
|
||||
i = memcmp(a->data, b->data, a->length);
|
||||
if (i == 0)
|
||||
return (a->type - b->type);
|
||||
else
|
||||
return (i);
|
||||
} else
|
||||
return (i);
|
||||
}
|
||||
*out_tag_number = 0;
|
||||
|
||||
void
|
||||
asn1_add_error(const unsigned char *address, int offset)
|
||||
{
|
||||
ERR_asprintf_error_data("offset=%d", offset);
|
||||
}
|
||||
CBS_init(out_content, NULL, 0);
|
||||
|
||||
int
|
||||
ASN1_STRING_length(const ASN1_STRING *x)
|
||||
{
|
||||
return (x->length);
|
||||
}
|
||||
if (!asn1_get_identifier_cbs(cbs, der_mode, &tag_class, &constructed,
|
||||
&tag_number))
|
||||
return 0;
|
||||
if (!asn1_get_length_cbs(cbs, der_mode, &indefinite, &length))
|
||||
return 0;
|
||||
|
||||
void
|
||||
ASN1_STRING_length_set(ASN1_STRING *x, int len)
|
||||
{
|
||||
x->length = len;
|
||||
}
|
||||
/* A primitive is not constructed and has a definite length. */
|
||||
if (constructed || indefinite)
|
||||
return 0;
|
||||
|
||||
int
|
||||
ASN1_STRING_type(const ASN1_STRING *x)
|
||||
{
|
||||
return (x->type);
|
||||
}
|
||||
if (!CBS_get_bytes(cbs, out_content, length))
|
||||
return 0;
|
||||
|
||||
unsigned char *
|
||||
ASN1_STRING_data(ASN1_STRING *x)
|
||||
{
|
||||
return (x->data);
|
||||
}
|
||||
*out_tag_number = tag_number;
|
||||
|
||||
const unsigned char *
|
||||
ASN1_STRING_get0_data(const ASN1_STRING *x)
|
||||
{
|
||||
return (x->data);
|
||||
return 1;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user