Oops... forgot to add new ENUMERATED file...

/* 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 "asn1.h"

/* Support for ASN1 ENUMERATED type: based on a_int.c */

/* ASN1err(ASN1_F_D2I_ASN1_ENUMERATED,ASN1_R_EXPECTING_AN_ENUMERATED);

 */

int i2d_ASN1_ENUMERATED(a,pp)

ASN1_ENUMERATED *a;

unsigned char **pp;

	{

	int pad=0,ret,r,i,t;

	unsigned char *p,*pt,*n,pb=0;

	if ((a == NULL) || (a->data == NULL)) return(0);

	t=a->type;

	if (a->length == 0)

		ret=1;

	else

		{

		ret=a->length;

		i=a->data[0];

		if ((t == V_ASN1_ENUMERATED) && (i > 127))

			{

			pad=1;

			pb=0;

			}

		else if ((t == V_ASN1_NEG_ENUMERATED) && (i>128))

			{

			pad=1;

			pb=0xFF;

			}

		ret+=pad;

		}

	r=ASN1_object_size(0,ret,V_ASN1_ENUMERATED);

	if (pp == NULL) return(r);

	p= *pp;

	ASN1_put_object(&p,0,ret,V_ASN1_ENUMERATED,V_ASN1_UNIVERSAL);

	if (pad) *(p++)=pb;

	if (a->length == 0)

		*(p++)=0;

	else if (t == V_ASN1_ENUMERATED)

		{

		memcpy(p,a->data,(unsigned int)a->length);

		p+=a->length;

		}

	else

		{

		n=a->data;

		pt=p;

		for (i=a->length; i>0; i--)

			*(p++)= (*(n++)^0xFF)+1;

		if (!pad) *pt|=0x80;

		}

	*pp=p;

	return(r);

	}

ASN1_ENUMERATED *d2i_ASN1_ENUMERATED(a, pp, length)

ASN1_ENUMERATED **a;

unsigned char **pp;

long length;

	{

	ASN1_ENUMERATED *ret=NULL;

	unsigned char *p,*to,*s;

	long len;

	int inf,tag,xclass;

	int i;

	if ((a == NULL) || ((*a) == NULL))

		{

		if ((ret=ASN1_ENUMERATED_new()) == NULL) return(NULL);

		ret->type=V_ASN1_ENUMERATED;

		}

	else

		ret=(*a);

	p= *pp;

	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);

	if (inf & 0x80)

		{

		i=ASN1_R_BAD_OBJECT_HEADER;

		goto err;

		}

	if (tag != V_ASN1_ENUMERATED)

		{

		i=ASN1_R_EXPECTING_AN_ENUMERATED;

		goto err;

		}

	/* We must Malloc stuff, even for 0 bytes otherwise it

	 * signifies a missing NULL parameter. */

	s=(unsigned char *)Malloc((int)len+1);

	if (s == NULL)

		{

		i=ERR_R_MALLOC_FAILURE;

		goto err;

		}

	to=s;

	if (*p & 0x80) /* a negative number */

		{

		ret->type=V_ASN1_NEG_ENUMERATED;

		if (*p == 0xff)

			{

			p++;

			len--;

			}

		for (i=(int)len; i>0; i--)

			*(to++)= (*(p++)^0xFF)+1;

		}

	else

		{

		ret->type=V_ASN1_ENUMERATED;

		if ((*p == 0) && (len != 1))

			{

			p++;

			len--;

			}

		memcpy(s,p,(int)len);

		p+=len;

		}

	if (ret->data != NULL) Free((char *)ret->data);

	ret->data=s;

	ret->length=(int)len;

	if (a != NULL) (*a)=ret;

	*pp=p;

	return(ret);

err:

	ASN1err(ASN1_F_D2I_ASN1_ENUMERATED,i);

	if ((ret != NULL) && ((a == NULL) || (*a != ret)))

		ASN1_ENUMERATED_free(ret);

	return(NULL);

	}

int ASN1_ENUMERATED_set(a,v)

ASN1_ENUMERATED *a;

long v;

	{

	int i,j,k;

	unsigned char buf[sizeof(long)+1];

	long d;

	a->type=V_ASN1_ENUMERATED;

	if (a->length < (sizeof(long)+1))

		{

		if (a->data != NULL)

			Free((char *)a->data);

		if ((a->data=(unsigned char *)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;

	if (v < 0) a->data[j++]=0;

	for (k=i-1; k >=0; k--)

		a->data[j++]=buf[k];

	a->length=j;

	return(1);

	}

long ASN1_ENUMERATED_get(a)

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(0);

	if (a->length > 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(bn,ai)

BIGNUM *bn;

ASN1_ENUMERATED *ai;

	{

	ASN1_ENUMERATED *ret;

	int len,j;

	if (ai == NULL)

		ret=ASN1_ENUMERATED_new();

	else

		ret=ai;

	if (ret == NULL)

		{

		ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_NESTED_ASN1_ERROR);

		goto err;

		}

	ret->type=V_ASN1_ENUMERATED;

	j=BN_num_bits(bn);

	len=((j == 0)?0:((j/8)+1));

	ret->data=(unsigned char *)Malloc(len+4);

	ret->length=BN_bn2bin(bn,ret->data);

	return(ret);

err:

	if (ret != ai) ASN1_ENUMERATED_free(ret);

	return(NULL);

	}

BIGNUM *ASN1_ENUMERATED_to_BN(ai,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);

	return(ret);

	}