402 lines
9.5 KiB
C
402 lines
9.5 KiB
C
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/* $OpenBSD: a_object.c,v 1.31 2018/04/25 11:48:21 tb Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <openssl/asn1.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/buffer.h>
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#include <openssl/objects.h>
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int
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i2d_ASN1_OBJECT(const ASN1_OBJECT *a, unsigned char **pp)
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{
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unsigned char *p;
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int objsize;
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if ((a == NULL) || (a->data == NULL))
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return (0);
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objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT);
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if (pp == NULL)
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return objsize;
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p = *pp;
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ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
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memcpy(p, a->data, a->length);
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p += a->length;
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*pp = p;
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return (objsize);
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}
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int
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a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
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{
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int i, first, len = 0, c, use_bn;
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char ftmp[24], *tmp = ftmp;
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int tmpsize = sizeof ftmp;
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const char *p;
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unsigned long l;
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BIGNUM *bl = NULL;
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if (num == 0)
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return (0);
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else if (num == -1)
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num = strlen(buf);
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p = buf;
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c = *(p++);
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num--;
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if ((c >= '0') && (c <= '2')) {
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first= c-'0';
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} else {
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ASN1error(ASN1_R_FIRST_NUM_TOO_LARGE);
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goto err;
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}
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if (num <= 0) {
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ASN1error(ASN1_R_MISSING_SECOND_NUMBER);
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goto err;
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}
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c = *(p++);
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num--;
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for (;;) {
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if (num <= 0)
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break;
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if ((c != '.') && (c != ' ')) {
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ASN1error(ASN1_R_INVALID_SEPARATOR);
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goto err;
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}
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l = 0;
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use_bn = 0;
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for (;;) {
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if (num <= 0)
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break;
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num--;
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c = *(p++);
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if ((c == ' ') || (c == '.'))
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break;
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if ((c < '0') || (c > '9')) {
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ASN1error(ASN1_R_INVALID_DIGIT);
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goto err;
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}
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if (!use_bn && l >= ((ULONG_MAX - 80) / 10L)) {
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use_bn = 1;
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if (!bl)
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bl = BN_new();
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if (!bl || !BN_set_word(bl, l))
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goto err;
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}
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if (use_bn) {
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if (!BN_mul_word(bl, 10L) ||
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!BN_add_word(bl, c-'0'))
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goto err;
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} else
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l = l * 10L + (long)(c - '0');
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}
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if (len == 0) {
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if ((first < 2) && (l >= 40)) {
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ASN1error(ASN1_R_SECOND_NUMBER_TOO_LARGE);
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goto err;
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}
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if (use_bn) {
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if (!BN_add_word(bl, first * 40))
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goto err;
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} else
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l += (long)first * 40;
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}
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i = 0;
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if (use_bn) {
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int blsize;
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blsize = BN_num_bits(bl);
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blsize = (blsize + 6) / 7;
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if (blsize > tmpsize) {
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if (tmp != ftmp)
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free(tmp);
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tmpsize = blsize + 32;
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tmp = malloc(tmpsize);
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if (!tmp)
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goto err;
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}
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while (blsize--)
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tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
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} else {
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for (;;) {
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tmp[i++] = (unsigned char)l & 0x7f;
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l >>= 7L;
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if (l == 0L)
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break;
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}
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}
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if (out != NULL) {
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if (len + i > olen) {
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ASN1error(ASN1_R_BUFFER_TOO_SMALL);
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goto err;
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}
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while (--i > 0)
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out[len++] = tmp[i]|0x80;
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out[len++] = tmp[0];
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} else
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len += i;
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}
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if (tmp != ftmp)
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free(tmp);
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BN_free(bl);
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return (len);
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err:
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if (tmp != ftmp)
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free(tmp);
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BN_free(bl);
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return (0);
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}
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int
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i2t_ASN1_OBJECT(char *buf, int buf_len, const ASN1_OBJECT *a)
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{
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return OBJ_obj2txt(buf, buf_len, a, 0);
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}
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int
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i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *a)
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{
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char *tmp = NULL;
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size_t tlen = 256;
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int i = -1;
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if ((a == NULL) || (a->data == NULL))
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return(BIO_write(bp, "NULL", 4));
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if ((tmp = malloc(tlen)) == NULL)
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return -1;
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i = i2t_ASN1_OBJECT(tmp, tlen, a);
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if (i > (int)(tlen - 1)) {
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freezero(tmp, tlen);
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if ((tmp = malloc(i + 1)) == NULL)
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return -1;
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tlen = i + 1;
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i = i2t_ASN1_OBJECT(tmp, tlen, a);
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}
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if (i <= 0)
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i = BIO_write(bp, "<INVALID>", 9);
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else
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i = BIO_write(bp, tmp, i);
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freezero(tmp, tlen);
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return (i);
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}
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ASN1_OBJECT *
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d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, long length)
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{
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const unsigned char *p;
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long len;
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int tag, xclass;
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int inf, i;
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ASN1_OBJECT *ret = NULL;
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p = *pp;
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inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
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if (inf & 0x80) {
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i = ASN1_R_BAD_OBJECT_HEADER;
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goto err;
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}
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if (tag != V_ASN1_OBJECT) {
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i = ASN1_R_EXPECTING_AN_OBJECT;
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goto err;
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}
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ret = c2i_ASN1_OBJECT(a, &p, len);
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if (ret)
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*pp = p;
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return ret;
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err:
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ASN1error(i);
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return (NULL);
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}
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ASN1_OBJECT *
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c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, long len)
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{
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ASN1_OBJECT *ret;
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const unsigned char *p;
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unsigned char *data;
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int i, length;
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/*
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* Sanity check OID encoding:
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* - need at least one content octet
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* - MSB must be clear in the last octet
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* - can't have leading 0x80 in subidentifiers, see: X.690 8.19.2
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*/
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if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL ||
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p[len - 1] & 0x80) {
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ASN1error(ASN1_R_INVALID_OBJECT_ENCODING);
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return (NULL);
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}
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/* Now 0 < len <= INT_MAX, so the cast is safe. */
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length = (int)len;
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for (i = 0; i < length; i++, p++) {
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if (*p == 0x80 && (!i || !(p[-1] & 0x80))) {
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ASN1error(ASN1_R_INVALID_OBJECT_ENCODING);
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return (NULL);
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}
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}
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/* only the ASN1_OBJECTs from the 'table' will have values
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* for ->sn or ->ln */
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if ((a == NULL) || ((*a) == NULL) ||
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!((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) {
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if ((ret = ASN1_OBJECT_new()) == NULL)
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return (NULL);
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} else
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ret = *a;
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p = *pp;
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/* detach data from object */
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data = (unsigned char *)ret->data;
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freezero(data, ret->length);
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data = malloc(length);
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if (data == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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memcpy(data, p, length);
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/* reattach data to object, after which it remains const */
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ret->data = data;
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ret->length = length;
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ret->sn = NULL;
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ret->ln = NULL;
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ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
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p += length;
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if (a != NULL)
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*a = ret;
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*pp = p;
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return (ret);
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err:
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if (a == NULL || ret != *a)
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ASN1_OBJECT_free(ret);
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return (NULL);
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}
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ASN1_OBJECT *
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ASN1_OBJECT_new(void)
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{
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ASN1_OBJECT *ret;
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ret = malloc(sizeof(ASN1_OBJECT));
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if (ret == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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ret->length = 0;
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ret->data = NULL;
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ret->nid = 0;
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ret->sn = NULL;
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ret->ln = NULL;
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ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;
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return (ret);
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}
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void
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ASN1_OBJECT_free(ASN1_OBJECT *a)
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{
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if (a == NULL)
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return;
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
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free((void *)a->sn);
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free((void *)a->ln);
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a->sn = a->ln = NULL;
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}
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
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|
|
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));
|
||
|
|
}
|