ber_oct.c

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/*
 * Copyright (c) 1995-2003, Index Data
 * See the file LICENSE for details.
 * Sebastian Hammer, Adam Dickmeiss
 *
 * $Id: ber_oct.c,v 1.21 2003/03/11 11:03:31 adam Exp $
 */
#if HAVE_CONFIG_H
#include <config.h>
#endif

#include "odr-priv.h"

int ber_octetstring(ODR o, Odr_oct *p, int cons)
{
    int res, len;
    const unsigned char *base;
    unsigned char *c;

    switch (o->direction)
    {
    	case ODR_DECODE:
	    if ((res = ber_declen(o->bp, &len, odr_max(o))) < 0)
	    {
                odr_seterror(o, OPROTO, 14);
	    	return 0;
	    }
	    o->bp += res;
	    if (cons)       /* fetch component strings */
	    {
	    	base = o->bp;
	    	while (odp_more_chunks(o, base, len))
		    if (!odr_octetstring(o, &p, 0, 0))
		    	return 0;
		return 1;
	    }
	    /* primitive octetstring */
	    if (len < 0)
	    {
                odr_seterror(o, OOTHER, 15);
	    	return 0;
	    }
            if (len > odr_max(o))
            {
                odr_seterror(o, OOTHER, 16);
                return 0;
            }
	    if (len + 1 > p->size - p->len)
	    {
	    	c = (unsigned char *)odr_malloc(o, p->size += len + 1);
	    	if (p->len)
		    memcpy(c, p->buf, p->len);
		p->buf = c;
	    }
	    if (len)
		memcpy(p->buf + p->len, o->bp, len);
	    p->len += len;
	    o->bp += len;
	    /* the final null is really not part of the buffer, but */
	    /* it helps somes applications that assumes C strings */
	    if (len)
		p->buf[p->len] = '\0';
	    return 1;
    	case ODR_ENCODE:
	    if ((res = ber_enclen(o, p->len, 5, 0)) < 0)
	    	return 0;
	    if (p->len == 0)
	    	return 1;
	    if (odr_write(o, p->buf, p->len) < 0)
	    	return 0;
	    return 1;
    	case ODR_PRINT: return 1;
    	default: odr_seterror(o, OOTHER, 17); return 0;
    }
}