obj_dat.c

开源的ssl算法openssl,版本0.9.8H

 * if "noname" is not set then search for short and long names first.
 * This will convert the "dotted" form into an object: unlike OBJ_txt2nid
 * it can be used with any objects, not just registered ones.
 */

ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
	{
	int nid = NID_undef;
	ASN1_OBJECT *op=NULL;
	unsigned char *buf;
	unsigned char *p;
	const unsigned char *cp;
	int i, j;

	if(!no_name) {
		if( ((nid = OBJ_sn2nid(s)) != NID_undef) ||
			((nid = OBJ_ln2nid(s)) != NID_undef) ) 
					return OBJ_nid2obj(nid);
	}

	/* Work out size of content octets */
	i=a2d_ASN1_OBJECT(NULL,0,s,-1);
	if (i <= 0) {
		/* Don't clear the error */
		/*ERR_clear_error();*/
		return NULL;
	}
	/* Work out total size */
	j = ASN1_object_size(0,i,V_ASN1_OBJECT);

	if((buf=(unsigned char *)OPENSSL_malloc(j)) == NULL) return NULL;

	p = buf;
	/* Write out tag+length */
	ASN1_put_object(&p,0,i,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
	/* Write out contents */
	a2d_ASN1_OBJECT(p,i,s,-1);

	cp=buf;
	op=d2i_ASN1_OBJECT(NULL,&cp,j);
	OPENSSL_free(buf);
	return op;
	}

int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
{
	int i,n=0,len,nid, first, use_bn;
	BIGNUM *bl;
	unsigned long l;
	unsigned char *p;
	char tbuf[DECIMAL_SIZE(i)+DECIMAL_SIZE(l)+2];

	if ((a == NULL) || (a->data == NULL)) {
		buf[0]='\0';
		return(0);
	}


	if (!no_name && (nid=OBJ_obj2nid(a)) != NID_undef)
		{
		const char *s;
		s=OBJ_nid2ln(nid);
		if (s == NULL)
			s=OBJ_nid2sn(nid);
		if (buf)
			BUF_strlcpy(buf,s,buf_len);
		n=strlen(s);
		return n;
		}


	len=a->length;
	p=a->data;

	first = 1;
	bl = NULL;

	while (len > 0)
		{
		l=0;
		use_bn = 0;
		for (;;)
			{
			unsigned char c = *p++;
			len--;
			if ((len == 0) && (c & 0x80))
				goto err;
			if (use_bn)
				{
				if (!BN_add_word(bl, c & 0x7f))
					goto err;
				}
			else
				l |= c  & 0x7f;
			if (!(c & 0x80))
				break;
			if (!use_bn && (l > (ULONG_MAX >> 7L)))
				{
				if (!bl && !(bl = BN_new()))
					goto err;
				if (!BN_set_word(bl, l))
					goto err;
				use_bn = 1;
				}
			if (use_bn)
				{
				if (!BN_lshift(bl, bl, 7))
					goto err;
				}
			else
				l<<=7L;
			}

		if (first)
			{
			first = 0;
			if (l >= 80)
				{
				i = 2;
				if (use_bn)
					{
					if (!BN_sub_word(bl, 80))
						goto err;
					}
				else
					l -= 80;
				}
			else
				{
				i=(int)(l/40);
				l-=(long)(i*40);
				}
			if (buf && (buf_len > 0))
				{
				*buf++ = i + '0';
				buf_len--;
				}
			n++;
			}

		if (use_bn)
			{
			char *bndec;
			bndec = BN_bn2dec(bl);
			if (!bndec)
				goto err;
			i = strlen(bndec);
			if (buf)
				{
				if (buf_len > 0)
					{
					*buf++ = '.';
					buf_len--;
					}
				BUF_strlcpy(buf,bndec,buf_len);
				if (i > buf_len)
					{
					buf += buf_len;
					buf_len = 0;
					}
				else
					{
					buf+=i;
					buf_len-=i;
					}
				}
			n++;
			n += i;
			OPENSSL_free(bndec);
			}
		else
			{
			BIO_snprintf(tbuf,sizeof tbuf,".%lu",l);
			i=strlen(tbuf);
			if (buf && (buf_len > 0))
				{
				BUF_strlcpy(buf,tbuf,buf_len);
				if (i > buf_len)
					{
					buf += buf_len;
					buf_len = 0;
					}
				else
					{
					buf+=i;
					buf_len-=i;
					}
				}
			n+=i;
			l=0;
			}
		}

	if (bl)
		BN_free(bl);
	return n;

	err:
	if (bl)
		BN_free(bl);
	return -1;
}

int OBJ_txt2nid(const char *s)
{
	ASN1_OBJECT *obj;
	int nid;
	obj = OBJ_txt2obj(s, 0);
	nid = OBJ_obj2nid(obj);
	ASN1_OBJECT_free(obj);
	return nid;
}

int OBJ_ln2nid(const char *s)
	{
	ASN1_OBJECT o,*oo= &o,**op;
	ADDED_OBJ ad,*adp;

	o.ln=s;
	if (added != NULL)
		{
		ad.type=ADDED_LNAME;
		ad.obj= &o;
		adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
		if (adp != NULL) return (adp->obj->nid);
		}
	op=(ASN1_OBJECT **)OBJ_bsearch((char *)&oo,(char *)ln_objs, NUM_LN,
		sizeof(ASN1_OBJECT *),ln_cmp);
	if (op == NULL) return(NID_undef);
	return((*op)->nid);
	}

int OBJ_sn2nid(const char *s)
	{
	ASN1_OBJECT o,*oo= &o,**op;
	ADDED_OBJ ad,*adp;

	o.sn=s;
	if (added != NULL)
		{
		ad.type=ADDED_SNAME;
		ad.obj= &o;
		adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
		if (adp != NULL) return (adp->obj->nid);
		}
	op=(ASN1_OBJECT **)OBJ_bsearch((char *)&oo,(char *)sn_objs,NUM_SN,
		sizeof(ASN1_OBJECT *),sn_cmp);
	if (op == NULL) return(NID_undef);
	return((*op)->nid);
	}

static int obj_cmp(const void *ap, const void *bp)
	{
	int j;
	const ASN1_OBJECT *a= *(ASN1_OBJECT * const *)ap;
	const ASN1_OBJECT *b= *(ASN1_OBJECT * const *)bp;

	j=(a->length - b->length);
        if (j) return(j);
	return(memcmp(a->data,b->data,a->length));
        }

const char *OBJ_bsearch(const char *key, const char *base, int num, int size,
	int (*cmp)(const void *, const void *))
	{
	return OBJ_bsearch_ex(key, base, num, size, cmp, 0);
	}

const char *OBJ_bsearch_ex(const char *key, const char *base, int num,
	int size, int (*cmp)(const void *, const void *), int flags)
	{
	int l,h,i=0,c=0;
	const char *p = NULL;

	if (num == 0) return(NULL);
	l=0;
	h=num;
	while (l < h)
		{
		i=(l+h)/2;
		p= &(base[i*size]);
		c=(*cmp)(key,p);
		if (c < 0)
			h=i;
		else if (c > 0)
			l=i+1;
		else
			break;
		}
#ifdef CHARSET_EBCDIC
/* THIS IS A KLUDGE - Because the *_obj is sorted in ASCII order, and
 * I don't have perl (yet), we revert to a *LINEAR* search
 * when the object wasn't found in the binary search.
 */
	if (c != 0)
		{
		for (i=0; i<num; ++i)
			{
			p= &(base[i*size]);
			c = (*cmp)(key,p);
			if (c == 0 || (c < 0 && (flags & OBJ_BSEARCH_VALUE_ON_NOMATCH)))
				return p;
			}
		}
#endif
	if (c != 0 && !(flags & OBJ_BSEARCH_VALUE_ON_NOMATCH))
		p = NULL;
	else if (c == 0 && (flags & OBJ_BSEARCH_FIRST_VALUE_ON_MATCH))
		{
		while(i > 0 && (*cmp)(key,&(base[(i-1)*size])) == 0)
			i--;
		p = &(base[i*size]);
		}
	return(p);
	}

int OBJ_create_objects(BIO *in)
	{
	MS_STATIC char buf[512];
	int i,num=0;
	char *o,*s,*l=NULL;

	for (;;)
		{
		s=o=NULL;
		i=BIO_gets(in,buf,512);
		if (i <= 0) return(num);
		buf[i-1]='\0';
		if (!isalnum((unsigned char)buf[0])) return(num);
		o=s=buf;
		while (isdigit((unsigned char)*s) || (*s == '.'))
			s++;
		if (*s != '\0')
			{
			*(s++)='\0';
			while (isspace((unsigned char)*s))
				s++;
			if (*s == '\0')
				s=NULL;
			else
				{
				l=s;
				while ((*l != '\0') && !isspace((unsigned char)*l))
					l++;
				if (*l != '\0')
					{
					*(l++)='\0';
					while (isspace((unsigned char)*l))
						l++;
					if (*l == '\0') l=NULL;
					}
				else
					l=NULL;
				}
			}
		else
			s=NULL;
		if ((o == NULL) || (*o == '\0')) return(num);
		if (!OBJ_create(o,s,l)) return(num);
		num++;
		}
	/* return(num); */
	}

int OBJ_create(const char *oid, const char *sn, const char *ln)
	{
	int ok=0;
	ASN1_OBJECT *op=NULL;
	unsigned char *buf;
	int i;

	i=a2d_ASN1_OBJECT(NULL,0,oid,-1);
	if (i <= 0) return(0);

	if ((buf=(unsigned char *)OPENSSL_malloc(i)) == NULL)
		{
		OBJerr(OBJ_F_OBJ_CREATE,ERR_R_MALLOC_FAILURE);
		return(0);
		}
	i=a2d_ASN1_OBJECT(buf,i,oid,-1);
	if (i == 0)
		goto err;
	op=(ASN1_OBJECT *)ASN1_OBJECT_create(OBJ_new_nid(1),buf,i,sn,ln);
	if (op == NULL) 
		goto err;
	ok=OBJ_add_object(op);
err:
	ASN1_OBJECT_free(op);
	OPENSSL_free(buf);
	return(ok);
	}