484 lines
13 KiB
C
484 lines
13 KiB
C
/* crypto/asn1/asn1_lib.c */
|
|
/* 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 <stdio.h>
|
|
#include <limits.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/asn1.h>
|
|
#include <openssl/asn1_mac.h>
|
|
|
|
static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
|
|
long max);
|
|
static void asn1_put_length(unsigned char **pp, int length);
|
|
const char ASN1_version[] = "ASN.1" OPENSSL_VERSION_PTEXT;
|
|
|
|
static int _asn1_check_infinite_end(const unsigned char **p, long len)
|
|
{
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
int ASN1_check_infinite_end(unsigned char **p, long len)
|
|
{
|
|
return _asn1_check_infinite_end((const unsigned char **)p, len);
|
|
}
|
|
|
|
int ASN1_const_check_infinite_end(const unsigned char **p, long len)
|
|
{
|
|
return _asn1_check_infinite_end(p, len);
|
|
}
|
|
|
|
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 (!max)
|
|
goto err;
|
|
ret = (*p & V_ASN1_CONSTRUCTED);
|
|
xclass = (*p & V_ASN1_PRIVATE);
|
|
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, max))
|
|
goto err;
|
|
|
|
if (inf && !(ret & V_ASN1_CONSTRUCTED))
|
|
goto err;
|
|
|
|
#if 0
|
|
fprintf(stderr, "p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
|
|
(int)p, *plength, omax, (int)*pp, (int)(p + *plength),
|
|
(int)(omax + *pp));
|
|
|
|
#endif
|
|
if (*plength > (omax - (p - *pp))) {
|
|
ASN1err(ASN1_F_ASN1_GET_OBJECT, 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:
|
|
ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_HEADER_TOO_LONG);
|
|
return (0x80);
|
|
}
|
|
|
|
static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
|
|
long max)
|
|
{
|
|
const unsigned char *p = *pp;
|
|
unsigned long ret = 0;
|
|
unsigned long i;
|
|
|
|
if (max-- < 1)
|
|
return 0;
|
|
if (*p == 0x80) {
|
|
*inf = 1;
|
|
ret = 0;
|
|
p++;
|
|
} else {
|
|
*inf = 0;
|
|
i = *p & 0x7f;
|
|
if (*(p++) & 0x80) {
|
|
if (i > sizeof(ret) || max < (long)i)
|
|
return 0;
|
|
while (i-- > 0) {
|
|
ret <<= 8L;
|
|
ret |= *(p++);
|
|
}
|
|
} else
|
|
ret = i;
|
|
}
|
|
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;
|
|
|
|
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 = 1;
|
|
if (length < 0)
|
|
return -1;
|
|
if (tag >= 31) {
|
|
while (tag > 0) {
|
|
tag >>= 7;
|
|
ret++;
|
|
}
|
|
}
|
|
if (constructed == 2) {
|
|
ret += 3;
|
|
} else {
|
|
ret++;
|
|
if (length > 127) {
|
|
int tmplen = length;
|
|
while (tmplen > 0) {
|
|
tmplen >>= 8;
|
|
ret++;
|
|
}
|
|
}
|
|
}
|
|
if (ret >= INT_MAX - length)
|
|
return -1;
|
|
return ret + length;
|
|
}
|
|
|
|
static int _asn1_Finish(ASN1_const_CTX *c)
|
|
{
|
|
if ((c->inf == (1 | V_ASN1_CONSTRUCTED)) && (!c->eos)) {
|
|
if (!ASN1_const_check_infinite_end(&c->p, c->slen)) {
|
|
c->error = ERR_R_MISSING_ASN1_EOS;
|
|
return (0);
|
|
}
|
|
}
|
|
if (((c->slen != 0) && !(c->inf & 1)) || ((c->slen < 0) && (c->inf & 1))) {
|
|
c->error = ERR_R_ASN1_LENGTH_MISMATCH;
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
int asn1_Finish(ASN1_CTX *c)
|
|
{
|
|
return _asn1_Finish((ASN1_const_CTX *)c);
|
|
}
|
|
|
|
int asn1_const_Finish(ASN1_const_CTX *c)
|
|
{
|
|
return _asn1_Finish(c);
|
|
}
|
|
|
|
int asn1_GetSequence(ASN1_const_CTX *c, long *length)
|
|
{
|
|
const unsigned char *q;
|
|
|
|
q = c->p;
|
|
c->inf = ASN1_get_object(&(c->p), &(c->slen), &(c->tag), &(c->xclass),
|
|
*length);
|
|
if (c->inf & 0x80) {
|
|
c->error = ERR_R_BAD_GET_ASN1_OBJECT_CALL;
|
|
return (0);
|
|
}
|
|
if (c->tag != V_ASN1_SEQUENCE) {
|
|
c->error = ERR_R_EXPECTING_AN_ASN1_SEQUENCE;
|
|
return (0);
|
|
}
|
|
(*length) -= (c->p - q);
|
|
if (c->max && (*length < 0)) {
|
|
c->error = ERR_R_ASN1_LENGTH_MISMATCH;
|
|
return (0);
|
|
}
|
|
if (c->inf == (1 | V_ASN1_CONSTRUCTED))
|
|
c->slen = *length;
|
|
c->eos = 0;
|
|
return (1);
|
|
}
|
|
|
|
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)
|
|
{
|
|
ASN1_STRING *ret;
|
|
if (!str)
|
|
return NULL;
|
|
ret = ASN1_STRING_new();
|
|
if (!ret)
|
|
return NULL;
|
|
if (!ASN1_STRING_copy(ret, str)) {
|
|
ASN1_STRING_free(ret);
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
|
|
{
|
|
unsigned char *c;
|
|
const char *data = _data;
|
|
|
|
if (len < 0) {
|
|
if (data == NULL)
|
|
return (0);
|
|
else
|
|
len = strlen(data);
|
|
}
|
|
if ((str->length <= len) || (str->data == NULL)) {
|
|
c = str->data;
|
|
if (c == NULL)
|
|
str->data = OPENSSL_malloc(len + 1);
|
|
else
|
|
str->data = OPENSSL_realloc(c, len + 1);
|
|
|
|
if (str->data == NULL) {
|
|
ASN1err(ASN1_F_ASN1_STRING_SET, ERR_R_MALLOC_FAILURE);
|
|
str->data = c;
|
|
return (0);
|
|
}
|
|
}
|
|
str->length = len;
|
|
if (data != NULL) {
|
|
memcpy(str->data, data, len);
|
|
/* an allowance for strings :-) */
|
|
str->data[len] = '\0';
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
|
|
{
|
|
if (str->data)
|
|
OPENSSL_free(str->data);
|
|
str->data = data;
|
|
str->length = len;
|
|
}
|
|
|
|
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 *ret;
|
|
|
|
ret = (ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING));
|
|
if (ret == NULL) {
|
|
ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW, 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 && !(a->flags & ASN1_STRING_FLAG_NDEF))
|
|
OPENSSL_free(a->data);
|
|
OPENSSL_free(a);
|
|
}
|
|
|
|
void ASN1_STRING_clear_free(ASN1_STRING *a)
|
|
{
|
|
if (a && a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
|
|
OPENSSL_cleanse(a->data, a->length);
|
|
ASN1_STRING_free(a);
|
|
}
|
|
|
|
int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
|
|
{
|
|
int i;
|
|
|
|
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);
|
|
}
|
|
|
|
void asn1_add_error(const unsigned char *address, int offset)
|
|
{
|
|
char buf1[DECIMAL_SIZE(address) + 1], buf2[DECIMAL_SIZE(offset) + 1];
|
|
|
|
BIO_snprintf(buf1, sizeof(buf1), "%lu", (unsigned long)address);
|
|
BIO_snprintf(buf2, sizeof(buf2), "%d", offset);
|
|
ERR_add_error_data(4, "address=", buf1, " offset=", buf2);
|
|
}
|
|
|
|
int ASN1_STRING_length(const ASN1_STRING *x)
|
|
{
|
|
return M_ASN1_STRING_length(x);
|
|
}
|
|
|
|
void ASN1_STRING_length_set(ASN1_STRING *x, int len)
|
|
{
|
|
M_ASN1_STRING_length_set(x, len);
|
|
return;
|
|
}
|
|
|
|
int ASN1_STRING_type(ASN1_STRING *x)
|
|
{
|
|
return M_ASN1_STRING_type(x);
|
|
}
|
|
|
|
unsigned char *ASN1_STRING_data(ASN1_STRING *x)
|
|
{
|
|
return M_ASN1_STRING_data(x);
|
|
}
|