mirror of
https://github.com/pineappleEA/pineapple-src.git
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195 lines
5.5 KiB
C
195 lines
5.5 KiB
C
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/* $OpenBSD: a_enum.c,v 1.20 2019/04/28 05:05:56 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 <openssl/asn1.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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/*
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* Code for ENUMERATED type: identical to INTEGER apart from a different tag.
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* for comments on encoding see a_int.c
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*/
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int
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ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
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{
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int j, k;
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unsigned int i;
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unsigned char buf[sizeof(long) + 1];
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long d;
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a->type = V_ASN1_ENUMERATED;
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if (a->length < (int)(sizeof(long) + 1)) {
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free(a->data);
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a->data = calloc(1, sizeof(long) + 1);
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}
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if (a->data == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return (0);
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}
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d = v;
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if (d < 0) {
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d = -d;
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a->type = V_ASN1_NEG_ENUMERATED;
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}
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for (i = 0; i < sizeof(long); i++) {
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if (d == 0)
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break;
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buf[i] = (int)d & 0xff;
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d >>= 8;
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}
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j = 0;
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for (k = i - 1; k >= 0; k--)
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a->data[j++] = buf[k];
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a->length = j;
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return (1);
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}
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long
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ASN1_ENUMERATED_get(const ASN1_ENUMERATED *a)
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{
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int neg = 0, i;
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unsigned long r = 0;
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if (a == NULL)
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return (0L);
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i = a->type;
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if (i == V_ASN1_NEG_ENUMERATED)
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neg = 1;
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else if (i != V_ASN1_ENUMERATED)
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return -1;
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if (a->length > (int)sizeof(long)) {
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/* hmm... a bit ugly */
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return -1;
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}
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if (a->data == NULL)
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return 0;
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for (i = 0; i < a->length; i++) {
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r <<= 8;
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r |= (unsigned char)a->data[i];
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}
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if (r > LONG_MAX)
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return -1;
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if (neg)
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return -(long)r;
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return (long)r;
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}
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ASN1_ENUMERATED *
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BN_to_ASN1_ENUMERATED(const BIGNUM *bn, ASN1_ENUMERATED *ai)
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{
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ASN1_ENUMERATED *ret;
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int len, j;
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if (ai == NULL)
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ret = ASN1_ENUMERATED_new();
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else
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ret = ai;
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if (ret == NULL) {
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ASN1error(ERR_R_NESTED_ASN1_ERROR);
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goto err;
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}
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if (BN_is_negative(bn))
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ret->type = V_ASN1_NEG_ENUMERATED;
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else
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ret->type = V_ASN1_ENUMERATED;
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j = BN_num_bits(bn);
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len = ((j == 0) ? 0 : ((j / 8) + 1));
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if (ret->length < len + 4) {
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unsigned char *new_data = realloc(ret->data, len + 4);
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if (!new_data) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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ret->data = new_data;
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}
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ret->length = BN_bn2bin(bn, ret->data);
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/* Correct zero case */
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if (!ret->length) {
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ret->data[0] = 0;
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ret->length = 1;
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}
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return (ret);
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err:
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if (ret != ai)
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ASN1_ENUMERATED_free(ret);
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return (NULL);
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}
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BIGNUM *
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ASN1_ENUMERATED_to_BN(const ASN1_ENUMERATED *ai, BIGNUM *bn)
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{
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BIGNUM *ret;
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if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL)
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ASN1error(ASN1_R_BN_LIB);
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else if (ai->type == V_ASN1_NEG_ENUMERATED)
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BN_set_negative(ret, 1);
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return (ret);
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}
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