ref: bae3ac29fc39bc36329abf1823004c0d79b2f6f0
dir: /sys/src/ape/lib/openssl/crypto/asn1/a_enum.c/
/* crypto/asn1/a_enum.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 "cryptlib.h"
#include <openssl/asn1.h>
#include <openssl/bn.h>
/*
* Code for ENUMERATED type: identical to INTEGER apart from a different tag.
* for comments on encoding see a_int.c
*/
int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
{
int j,k;
unsigned int i;
unsigned char buf[sizeof(long)+1];
long d;
a->type=V_ASN1_ENUMERATED;
if (a->length < (int)(sizeof(long)+1))
{
if (a->data != NULL)
OPENSSL_free(a->data);
if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL)
memset((char *)a->data,0,sizeof(long)+1);
}
if (a->data == NULL)
{
ASN1err(ASN1_F_ASN1_ENUMERATED_SET,ERR_R_MALLOC_FAILURE);
return(0);
}
d=v;
if (d < 0)
{
d= -d;
a->type=V_ASN1_NEG_ENUMERATED;
}
for (i=0; i<sizeof(long); i++)
{
if (d == 0) break;
buf[i]=(int)d&0xff;
d>>=8;
}
j=0;
for (k=i-1; k >=0; k--)
a->data[j++]=buf[k];
a->length=j;
return(1);
}
long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
{
int neg=0,i;
long r=0;
if (a == NULL) return(0L);
i=a->type;
if (i == V_ASN1_NEG_ENUMERATED)
neg=1;
else if (i != V_ASN1_ENUMERATED)
return -1;
if (a->length > (int)sizeof(long))
{
/* hmm... a bit ugly */
return(0xffffffffL);
}
if (a->data == NULL)
return 0;
for (i=0; i<a->length; i++)
{
r<<=8;
r|=(unsigned char)a->data[i];
}
if (neg) r= -r;
return(r);
}
ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
{
ASN1_ENUMERATED *ret;
int len,j;
if (ai == NULL)
ret=M_ASN1_ENUMERATED_new();
else
ret=ai;
if (ret == NULL)
{
ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_NESTED_ASN1_ERROR);
goto err;
}
if(BN_is_negative(bn)) ret->type = V_ASN1_NEG_ENUMERATED;
else ret->type=V_ASN1_ENUMERATED;
j=BN_num_bits(bn);
len=((j == 0)?0:((j/8)+1));
if (ret->length < len+4)
{
unsigned char *new_data=OPENSSL_realloc(ret->data, len+4);
if (!new_data)
{
ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
goto err;
}
ret->data=new_data;
}
ret->length=BN_bn2bin(bn,ret->data);
return(ret);
err:
if (ret != ai) M_ASN1_ENUMERATED_free(ret);
return(NULL);
}
BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
{
BIGNUM *ret;
if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL)
ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN,ASN1_R_BN_LIB);
else if(ai->type == V_ASN1_NEG_ENUMERATED) BN_set_negative(ret,1);
return(ret);
}