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- /*
- * snmp_auth.c -
- * Authentication for SNMP (RFC 1067). This implements a null
- * authentication layer.
- *
- *
- */
- /***********************************************************
- Copyright 1988, 1989 by Carnegie Mellon University
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the name of CMU not be
- used in advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
- CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- SOFTWARE.
- ******************************************************************/
-
- #ifdef KINETICS
- #include "gw.h"
- #include "fp4/cmdmacro.h"
- #endif
-
- #if (defined(unix) && !defined(KINETICS))
- #include <sys/types.h>
- #include <netinet/in.h>
- #ifndef NULL
- #define NULL 0
- #endif
- #endif
-
- #include "asn1.h"
- #include "snmp.h"
- #include "snmp_impl.h"
-
- u_char *
- snmp_auth_parse(data, length, sid, slen, version)
- u_char *data;
- int *length;
- u_char *sid;
- int *slen;
- long *version;
- {
- u_char type;
-
- data = asn_parse_header(data, length, &type);
- if (data == NULL){
- ERROR("bad header");
- return NULL;
- }
- if (type != (ASN_SEQUENCE | ASN_CONSTRUCTOR)){
- ERROR("wrong auth header type");
- return NULL;
- }
- data = asn_parse_int(data, length, &type, version, sizeof(*version));
- if (data == NULL){
- ERROR("bad parse of version");
- return NULL;
- }
- data = asn_parse_string(data, length, &type, sid, slen);
- if (data == NULL){
- ERROR("bad parse of community");
- return NULL;
- }
- sid[*slen] = '\0';
- return (u_char *)data;
- }
-
- u_char *
- snmp_auth_build(data, length, sid, slen, version, messagelen)
- u_char *data;
- int *length;
- u_char *sid;
- int *slen;
- long *version;
- int messagelen;
- {
- data = asn_build_header(data, length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), messagelen + *slen + 5);
- if (data == NULL){
- ERROR("buildheader");
- return NULL;
- }
- data = asn_build_int(data, length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
- (long *)version, sizeof(*version));
- if (data == NULL){
- ERROR("buildint");
- return NULL;
- }
- data = asn_build_string(data, length,
- (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR),
- sid, *slen);
- if (data == NULL){
- ERROR("buildstring");
- return NULL;
- }
- return (u_char *)data;
- }
-