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

660 lines
14 KiB
C
Executable file

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