1027 lines
27 KiB
C
1027 lines
27 KiB
C
/*-
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* Copyright (c) 2010 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Shteryana Sotirova Shopova under
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* sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <syslog.h>
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#include "asn1.h"
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#include "snmp.h"
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#include "snmpmod.h"
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#include "vacm_tree.h"
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#include "vacm_oid.h"
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static struct lmodule *vacm_module;
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/* For the registration. */
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static const struct asn_oid oid_vacm = OIDX_snmpVacmMIB;
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static uint reg_vacm;
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static int32_t vacm_lock;
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/*
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* Internal datastructures and forward declarations.
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*/
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static void vacm_append_userindex(struct asn_oid *,
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uint, const struct vacm_user *);
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static int vacm_user_index_decode(const struct asn_oid *,
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uint, int32_t *, char *);
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static struct vacm_user *vacm_get_user(const struct asn_oid *,
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uint);
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static struct vacm_user *vacm_get_next_user(const struct asn_oid *,
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uint);
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static void vacm_append_access_rule_index(struct asn_oid *,
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uint, const struct vacm_access *);
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static int vacm_access_rule_index_decode(const struct asn_oid *,
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uint, char *, char *, int32_t *, int32_t *);
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static struct vacm_access * vacm_get_access_rule(const struct asn_oid *,
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uint);
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static struct vacm_access * vacm_get_next_access_rule(const struct asn_oid *,
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uint);
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static int vacm_view_index_decode(const struct asn_oid *, uint,
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char *, struct asn_oid *);
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static void vacm_append_viewindex(struct asn_oid *, uint,
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const struct vacm_view *);
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static struct vacm_view *vacm_get_view(const struct asn_oid *, uint);
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static struct vacm_view *vacm_get_next_view(const struct asn_oid *, uint);
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static struct vacm_view *vacm_get_view_by_name(u_char *, u_int);
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static struct vacm_context *vacm_get_context(const struct asn_oid *, uint);
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static struct vacm_context *vacm_get_next_context(const struct asn_oid *,
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uint);
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static void vacm_append_ctxindex(struct asn_oid *, uint,
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const struct vacm_context *);
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int
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op_vacm_context(struct snmp_context *ctx __unused, struct snmp_value *val,
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uint32_t sub, uint32_t iidx __unused, enum snmp_op op)
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{
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char cname[SNMP_ADM_STR32_SIZ];
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size_t cnamelen;
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struct vacm_context *vacm_ctx;
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if (val->var.subs[sub - 1] != LEAF_vacmContextName)
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abort();
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switch (op) {
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case SNMP_OP_GET:
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if ((vacm_ctx = vacm_get_context(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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break;
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case SNMP_OP_GETNEXT:
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if ((vacm_ctx = vacm_get_next_context(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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vacm_append_ctxindex(&val->var, sub, vacm_ctx);
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break;
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case SNMP_OP_SET:
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if ((vacm_ctx = vacm_get_context(&val->var, sub)) != NULL)
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return (SNMP_ERR_WRONG_VALUE);
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if (community != COMM_INITIALIZE)
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return (SNMP_ERR_NOT_WRITEABLE);
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if (val->var.subs[sub] >= SNMP_ADM_STR32_SIZ)
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return (SNMP_ERR_WRONG_VALUE);
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if (index_decode(&val->var, sub, iidx, &cname, &cnamelen))
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return (SNMP_ERR_GENERR);
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cname[cnamelen] = '\0';
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if ((vacm_ctx = vacm_add_context(cname, reg_vacm)) == NULL)
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return (SNMP_ERR_GENERR);
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return (SNMP_ERR_NOERROR);
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case SNMP_OP_COMMIT:
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/* FALLTHROUGH*/
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case SNMP_OP_ROLLBACK:
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return (SNMP_ERR_NOERROR);
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default:
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abort();
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}
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return (string_get(val, vacm_ctx->ctxname, -1));
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}
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int
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op_vacm_security_to_group(struct snmp_context *ctx, struct snmp_value *val,
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uint32_t sub, uint32_t iidx __unused, enum snmp_op op)
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{
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int32_t smodel;
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char uname[SNMP_ADM_STR32_SIZ];
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struct vacm_user *user;
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switch (op) {
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case SNMP_OP_GET:
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if ((user = vacm_get_user(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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break;
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case SNMP_OP_GETNEXT:
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if ((user = vacm_get_next_user(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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vacm_append_userindex(&val->var, sub, user);
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break;
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case SNMP_OP_SET:
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if ((user = vacm_get_user(&val->var, sub)) == NULL &&
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val->var.subs[sub - 1] != LEAF_vacmSecurityToGroupStatus)
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return (SNMP_ERR_NOSUCHNAME);
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if (user != NULL) {
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if (community != COMM_INITIALIZE &&
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user->type == StorageType_readOnly)
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return (SNMP_ERR_NOT_WRITEABLE);
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if (user->status == RowStatus_active &&
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val->v.integer != RowStatus_destroy)
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return (SNMP_ERR_INCONS_VALUE);
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}
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switch (val->var.subs[sub - 1]) {
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case LEAF_vacmGroupName:
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ctx->scratch->ptr1 = user->group->groupname;
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ctx->scratch->int1 = strlen(user->group->groupname);
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return (vacm_user_set_group(user,
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val->v.octetstring.octets,val->v.octetstring.len));
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case LEAF_vacmSecurityToGroupStorageType:
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return (SNMP_ERR_INCONS_VALUE);
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case LEAF_vacmSecurityToGroupStatus:
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if (user == NULL) {
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if (val->v.integer != RowStatus_createAndGo ||
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vacm_user_index_decode(&val->var, sub,
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&smodel, uname) < 0)
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return (SNMP_ERR_INCONS_VALUE);
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user = vacm_new_user(smodel, uname);
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if (user == NULL)
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return (SNMP_ERR_GENERR);
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user->status = RowStatus_destroy;
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if (community != COMM_INITIALIZE)
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user->type = StorageType_volatile;
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else
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user->type = StorageType_readOnly;
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} else if (val->v.integer != RowStatus_active &&
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val->v.integer != RowStatus_destroy)
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return (SNMP_ERR_INCONS_VALUE);
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ctx->scratch->int1 = user->status;
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user->status = val->v.integer;
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break;
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}
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return (SNMP_ERR_NOERROR);
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case SNMP_OP_COMMIT:
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if (val->var.subs[sub - 1] != LEAF_vacmSecurityToGroupStatus)
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return (SNMP_ERR_NOERROR);
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if ((user = vacm_get_user(&val->var, sub)) == NULL)
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return (SNMP_ERR_GENERR);
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switch (val->v.integer) {
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case RowStatus_destroy:
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return (vacm_delete_user(user));
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case RowStatus_createAndGo:
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user->status = RowStatus_active;
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break;
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default:
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break;
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}
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return (SNMP_ERR_NOERROR);
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case SNMP_OP_ROLLBACK:
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if ((user = vacm_get_user(&val->var, sub)) == NULL)
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return (SNMP_ERR_GENERR);
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switch (val->var.subs[sub - 1]) {
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case LEAF_vacmGroupName:
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return (vacm_user_set_group(user, ctx->scratch->ptr1,
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ctx->scratch->int1));
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case LEAF_vacmSecurityToGroupStatus:
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if (ctx->scratch->int1 == RowStatus_destroy)
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return (vacm_delete_user(user));
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user->status = ctx->scratch->int1;
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break;
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default:
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break;
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}
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return (SNMP_ERR_NOERROR);
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default:
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abort();
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}
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switch (val->var.subs[sub - 1]) {
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case LEAF_vacmGroupName:
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return (string_get(val, user->group->groupname, -1));
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case LEAF_vacmSecurityToGroupStorageType:
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val->v.integer = user->type;
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break;
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case LEAF_vacmSecurityToGroupStatus:
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val->v.integer = user->status;
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break;
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default:
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abort();
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}
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return (SNMP_ERR_NOERROR);
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}
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int
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op_vacm_access(struct snmp_context *ctx, struct snmp_value *val, uint32_t sub,
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uint32_t iidx __unused, enum snmp_op op)
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{
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int32_t smodel, slevel;
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char gname[SNMP_ADM_STR32_SIZ], cprefix[SNMP_ADM_STR32_SIZ];
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struct vacm_access *acl;
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switch (op) {
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case SNMP_OP_GET:
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if ((acl = vacm_get_access_rule(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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break;
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case SNMP_OP_GETNEXT:
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if ((acl = vacm_get_next_access_rule(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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vacm_append_access_rule_index(&val->var, sub, acl);
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break;
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case SNMP_OP_SET:
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if ((acl = vacm_get_access_rule(&val->var, sub)) == NULL &&
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val->var.subs[sub - 1] != LEAF_vacmAccessStatus)
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return (SNMP_ERR_NOSUCHNAME);
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if (acl != NULL && community != COMM_INITIALIZE &&
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acl->type == StorageType_readOnly)
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return (SNMP_ERR_NOT_WRITEABLE);
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switch (val->var.subs[sub - 1]) {
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case LEAF_vacmAccessContextMatch:
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ctx->scratch->int1 = acl->ctx_match;
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if (val->v.integer == vacmAccessContextMatch_exact)
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acl->ctx_match = 1;
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else if (val->v.integer == vacmAccessContextMatch_prefix)
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acl->ctx_match = 0;
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else
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return (SNMP_ERR_WRONG_VALUE);
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break;
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case LEAF_vacmAccessReadViewName:
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ctx->scratch->ptr1 = acl->read_view;
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acl->read_view = vacm_get_view_by_name(val->v.octetstring.octets, val->v.octetstring.len);
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if (acl->read_view == NULL) {
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acl->read_view = ctx->scratch->ptr1;
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return (SNMP_ERR_INCONS_VALUE);
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}
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return (SNMP_ERR_NOERROR);
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case LEAF_vacmAccessWriteViewName:
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ctx->scratch->ptr1 = acl->write_view;
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if ((acl->write_view =
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vacm_get_view_by_name(val->v.octetstring.octets,
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val->v.octetstring.len)) == NULL) {
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acl->write_view = ctx->scratch->ptr1;
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return (SNMP_ERR_INCONS_VALUE);
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}
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break;
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case LEAF_vacmAccessNotifyViewName:
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ctx->scratch->ptr1 = acl->notify_view;
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if ((acl->notify_view =
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vacm_get_view_by_name(val->v.octetstring.octets,
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val->v.octetstring.len)) == NULL) {
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acl->notify_view = ctx->scratch->ptr1;
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return (SNMP_ERR_INCONS_VALUE);
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}
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break;
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case LEAF_vacmAccessStorageType:
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return (SNMP_ERR_INCONS_VALUE);
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case LEAF_vacmAccessStatus:
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if (acl == NULL) {
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if (val->v.integer != RowStatus_createAndGo ||
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vacm_access_rule_index_decode(&val->var,
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sub, gname, cprefix, &smodel, &slevel) < 0)
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return (SNMP_ERR_INCONS_VALUE);
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if ((acl = vacm_new_access_rule(gname, cprefix,
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smodel, slevel)) == NULL)
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return (SNMP_ERR_GENERR);
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acl->status = RowStatus_destroy;
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if (community != COMM_INITIALIZE)
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acl->type = StorageType_volatile;
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else
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acl->type = StorageType_readOnly;
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} else if (val->v.integer != RowStatus_active &&
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val->v.integer != RowStatus_destroy)
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return (SNMP_ERR_INCONS_VALUE);
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ctx->scratch->int1 = acl->status;
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acl->status = val->v.integer;
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break;
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}
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return (SNMP_ERR_NOERROR);
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case SNMP_OP_COMMIT:
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if (val->var.subs[sub - 1] != LEAF_vacmAccessStatus)
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return (SNMP_ERR_NOERROR);
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if ((acl = vacm_get_access_rule(&val->var, sub)) == NULL)
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return (SNMP_ERR_GENERR);
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if (val->v.integer == RowStatus_destroy)
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return (vacm_delete_access_rule(acl));
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else
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acl->status = RowStatus_active;
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return (SNMP_ERR_NOERROR);
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case SNMP_OP_ROLLBACK:
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if ((acl = vacm_get_access_rule(&val->var, sub)) == NULL)
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return (SNMP_ERR_GENERR);
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switch (val->var.subs[sub - 1]) {
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case LEAF_vacmAccessContextMatch:
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acl->ctx_match = ctx->scratch->int1;
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break;
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case LEAF_vacmAccessReadViewName:
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acl->read_view = ctx->scratch->ptr1;
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break;
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case LEAF_vacmAccessWriteViewName:
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acl->write_view = ctx->scratch->ptr1;
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break;
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case LEAF_vacmAccessNotifyViewName:
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acl->notify_view = ctx->scratch->ptr1;
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break;
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case LEAF_vacmAccessStatus:
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if (ctx->scratch->int1 == RowStatus_destroy)
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return (vacm_delete_access_rule(acl));
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default:
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break;
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}
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return (SNMP_ERR_NOERROR);
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default:
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abort();
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}
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switch (val->var.subs[sub - 1]) {
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case LEAF_vacmAccessContextMatch:
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return (string_get(val, acl->ctx_prefix, -1));
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case LEAF_vacmAccessReadViewName:
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if (acl->read_view != NULL)
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return (string_get(val, acl->read_view->viewname, -1));
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else
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return (string_get(val, NULL, 0));
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case LEAF_vacmAccessWriteViewName:
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if (acl->write_view != NULL)
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return (string_get(val, acl->write_view->viewname, -1));
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else
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return (string_get(val, NULL, 0));
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case LEAF_vacmAccessNotifyViewName:
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if (acl->notify_view != NULL)
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return (string_get(val, acl->notify_view->viewname, -1));
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else
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return (string_get(val, NULL, 0));
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case LEAF_vacmAccessStorageType:
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val->v.integer = acl->type;
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break;
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case LEAF_vacmAccessStatus:
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val->v.integer = acl->status;
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break;
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default:
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abort();
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}
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return (SNMP_ERR_NOERROR);
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}
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int
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op_vacm_view_lock(struct snmp_context *ctx __unused, struct snmp_value *val,
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uint32_t sub, uint32_t iidx __unused, enum snmp_op op)
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{
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if (val->var.subs[sub - 1] != LEAF_vacmViewSpinLock)
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return (SNMP_ERR_NOSUCHNAME);
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switch (op) {
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case SNMP_OP_GET:
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if (++vacm_lock == INT32_MAX)
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vacm_lock = 0;
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val->v.integer = vacm_lock;
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break;
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case SNMP_OP_GETNEXT:
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abort();
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case SNMP_OP_SET:
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if (val->v.integer != vacm_lock)
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return (SNMP_ERR_INCONS_VALUE);
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break;
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case SNMP_OP_ROLLBACK:
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/* FALLTHROUGH */
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case SNMP_OP_COMMIT:
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break;
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}
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return (SNMP_ERR_NOERROR);
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}
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int
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op_vacm_view(struct snmp_context *ctx, struct snmp_value *val, uint32_t sub,
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uint32_t iidx __unused, enum snmp_op op)
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{
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char vname[SNMP_ADM_STR32_SIZ];
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struct asn_oid oid;
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struct vacm_view *view;
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switch (op) {
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case SNMP_OP_GET:
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if ((view = vacm_get_view(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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break;
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case SNMP_OP_GETNEXT:
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if ((view = vacm_get_next_view(&val->var, sub)) == NULL)
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return (SNMP_ERR_NOSUCHNAME);
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vacm_append_viewindex(&val->var, sub, view);
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break;
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case SNMP_OP_SET:
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|
if ((view = vacm_get_view(&val->var, sub)) == NULL &&
|
|
val->var.subs[sub - 1] != LEAF_vacmViewTreeFamilyStatus)
|
|
return (SNMP_ERR_NOSUCHNAME);
|
|
|
|
if (view != NULL) {
|
|
if (community != COMM_INITIALIZE &&
|
|
view->type == StorageType_readOnly)
|
|
return (SNMP_ERR_NOT_WRITEABLE);
|
|
if (view->status == RowStatus_active &&
|
|
val->v.integer != RowStatus_destroy)
|
|
return (SNMP_ERR_INCONS_VALUE);
|
|
}
|
|
|
|
switch (val->var.subs[sub - 1]) {
|
|
case LEAF_vacmViewTreeFamilyMask:
|
|
if (val->v.octetstring.len > sizeof(view->mask))
|
|
ctx->scratch->ptr1 = malloc(sizeof(view->mask));
|
|
if (ctx->scratch->ptr1 == NULL)
|
|
return (SNMP_ERR_GENERR);
|
|
memset(ctx->scratch->ptr1, 0, sizeof(view->mask));
|
|
memcpy(ctx->scratch->ptr1, view->mask,
|
|
sizeof(view->mask));
|
|
memset(view->mask, 0, sizeof(view->mask));
|
|
memcpy(view->mask, val->v.octetstring.octets,
|
|
val->v.octetstring.len);
|
|
break;
|
|
|
|
case LEAF_vacmViewTreeFamilyType:
|
|
ctx->scratch->int1 = view->exclude;
|
|
if (val->v.integer == vacmViewTreeFamilyType_included)
|
|
view->exclude = 0;
|
|
else if (val->v.integer == vacmViewTreeFamilyType_excluded)
|
|
view->exclude = 1;
|
|
else
|
|
return (SNMP_ERR_WRONG_VALUE);
|
|
break;
|
|
|
|
case LEAF_vacmViewTreeFamilyStorageType:
|
|
return (SNMP_ERR_INCONS_VALUE);
|
|
|
|
case LEAF_vacmViewTreeFamilyStatus:
|
|
if (view == NULL) {
|
|
if (val->v.integer != RowStatus_createAndGo ||
|
|
vacm_view_index_decode(&val->var, sub, vname,
|
|
&oid) < 0)
|
|
return (SNMP_ERR_INCONS_VALUE);
|
|
if ((view = vacm_new_view(vname, &oid)) == NULL)
|
|
return (SNMP_ERR_GENERR);
|
|
view->status = RowStatus_destroy;
|
|
if (community != COMM_INITIALIZE)
|
|
view->type = StorageType_volatile;
|
|
else
|
|
view->type = StorageType_readOnly;
|
|
} else if (val->v.integer != RowStatus_active &&
|
|
val->v.integer != RowStatus_destroy)
|
|
return (SNMP_ERR_INCONS_VALUE);
|
|
ctx->scratch->int1 = view->status;
|
|
view->status = val->v.integer;
|
|
break;
|
|
}
|
|
return (SNMP_ERR_NOERROR);
|
|
|
|
case SNMP_OP_COMMIT:
|
|
switch (val->var.subs[sub - 1]) {
|
|
case LEAF_vacmViewTreeFamilyMask:
|
|
free(ctx->scratch->ptr1);
|
|
break;
|
|
case LEAF_vacmViewTreeFamilyStatus:
|
|
if ((view = vacm_get_view(&val->var, sub)) == NULL)
|
|
return (SNMP_ERR_GENERR);
|
|
switch (val->v.integer) {
|
|
case RowStatus_destroy:
|
|
return (vacm_delete_view(view));
|
|
|
|
case RowStatus_createAndGo:
|
|
view->status = RowStatus_active;
|
|
break;
|
|
|
|
default:
|
|
/* NOTREACHED*/
|
|
return (SNMP_ERR_GENERR);
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
return (SNMP_ERR_NOERROR);
|
|
|
|
case SNMP_OP_ROLLBACK:
|
|
if ((view = vacm_get_view(&val->var, sub)) == NULL)
|
|
return (SNMP_ERR_GENERR);
|
|
switch (val->var.subs[sub - 1]) {
|
|
case LEAF_vacmViewTreeFamilyMask:
|
|
memcpy(view->mask, ctx->scratch->ptr1,
|
|
sizeof(view->mask));
|
|
free(ctx->scratch->ptr1);
|
|
break;
|
|
case LEAF_vacmViewTreeFamilyType:
|
|
view->exclude = ctx->scratch->int1;
|
|
break;
|
|
case LEAF_vacmViewTreeFamilyStatus:
|
|
if (ctx->scratch->int1 == RowStatus_destroy)
|
|
return (vacm_delete_view(view));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return (SNMP_ERR_NOERROR);
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
|
|
switch (val->var.subs[sub - 1]) {
|
|
case LEAF_vacmViewTreeFamilyMask:
|
|
return (string_get(val, view->mask, sizeof(view->mask)));
|
|
case LEAF_vacmViewTreeFamilyType:
|
|
if (view->exclude)
|
|
val->v.integer = vacmViewTreeFamilyType_excluded;
|
|
else
|
|
val->v.integer = vacmViewTreeFamilyType_included;
|
|
break;
|
|
case LEAF_vacmViewTreeFamilyStorageType:
|
|
val->v.integer = view->type;
|
|
break;
|
|
case LEAF_vacmViewTreeFamilyStatus:
|
|
val->v.integer = view->status;
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
|
|
return (SNMP_ERR_NOERROR);
|
|
}
|
|
|
|
static void
|
|
vacm_append_userindex(struct asn_oid *oid, uint sub,
|
|
const struct vacm_user *user)
|
|
{
|
|
uint32_t i;
|
|
|
|
oid->len = sub + strlen(user->secname) + 2;
|
|
oid->subs[sub++] = user->sec_model;
|
|
oid->subs[sub] = strlen(user->secname);
|
|
for (i = 1; i <= strlen(user->secname); i++)
|
|
oid->subs[sub + i] = user->secname[i - 1];
|
|
}
|
|
|
|
static int
|
|
vacm_user_index_decode(const struct asn_oid *oid, uint sub,
|
|
int32_t *smodel, char *uname)
|
|
{
|
|
uint32_t i;
|
|
|
|
*smodel = oid->subs[sub++];
|
|
|
|
if (oid->subs[sub] >= SNMP_ADM_STR32_SIZ)
|
|
return (-1);
|
|
|
|
for (i = 0; i < oid->subs[sub]; i++)
|
|
uname[i] = oid->subs[sub + i + 1];
|
|
uname[i] = '\0';
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct vacm_user *
|
|
vacm_get_user(const struct asn_oid *oid, uint sub)
|
|
{
|
|
int32_t smodel;
|
|
char uname[SNMP_ADM_STR32_SIZ];
|
|
struct vacm_user *user;
|
|
|
|
if (vacm_user_index_decode(oid, sub, &smodel, uname) < 0)
|
|
return (NULL);
|
|
|
|
for (user = vacm_first_user(); user != NULL; user = vacm_next_user(user))
|
|
if (strcmp(uname, user->secname) == 0 &&
|
|
user->sec_model == smodel)
|
|
return (user);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static struct vacm_user *
|
|
vacm_get_next_user(const struct asn_oid *oid, uint sub)
|
|
{
|
|
int32_t smodel;
|
|
char uname[SNMP_ADM_STR32_SIZ];
|
|
struct vacm_user *user;
|
|
|
|
if (oid->len - sub == 0)
|
|
return (vacm_first_user());
|
|
|
|
if (vacm_user_index_decode(oid, sub, &smodel, uname) < 0)
|
|
return (NULL);
|
|
|
|
for (user = vacm_first_user(); user != NULL; user = vacm_next_user(user))
|
|
if (strcmp(uname, user->secname) == 0 &&
|
|
user->sec_model == smodel)
|
|
return (vacm_next_user(user));
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static void
|
|
vacm_append_access_rule_index(struct asn_oid *oid, uint sub,
|
|
const struct vacm_access *acl)
|
|
{
|
|
uint32_t i;
|
|
|
|
oid->len = sub + strlen(acl->group->groupname) +
|
|
strlen(acl->ctx_prefix) + 4;
|
|
|
|
oid->subs[sub] = strlen(acl->group->groupname);
|
|
for (i = 1; i <= strlen(acl->group->groupname); i++)
|
|
oid->subs[sub + i] = acl->group->groupname[i - 1];
|
|
sub += strlen(acl->group->groupname) + 1;
|
|
|
|
oid->subs[sub] = strlen(acl->ctx_prefix);
|
|
for (i = 1; i <= strlen(acl->ctx_prefix); i++)
|
|
oid->subs[sub + i] = acl->ctx_prefix[i - 1];
|
|
sub += strlen(acl->ctx_prefix) + 1;
|
|
oid->subs[sub++] = acl->sec_model;
|
|
oid->subs[sub] = acl->sec_level;
|
|
}
|
|
|
|
static int
|
|
vacm_access_rule_index_decode(const struct asn_oid *oid, uint sub, char *gname,
|
|
char *cprefix, int32_t *smodel, int32_t *slevel)
|
|
{
|
|
uint32_t i;
|
|
|
|
if (oid->subs[sub] >= SNMP_ADM_STR32_SIZ)
|
|
return (-1);
|
|
|
|
for (i = 0; i < oid->subs[sub]; i++)
|
|
gname[i] = oid->subs[sub + i + 1];
|
|
gname[i] = '\0';
|
|
sub += strlen(gname) + 1;
|
|
|
|
if (oid->subs[sub] >= SNMP_ADM_STR32_SIZ)
|
|
return (-1);
|
|
|
|
for (i = 0; i < oid->subs[sub]; i++)
|
|
cprefix[i] = oid->subs[sub + i + 1];
|
|
cprefix[i] = '\0';
|
|
sub += strlen(cprefix) + 1;
|
|
|
|
*smodel = oid->subs[sub++];
|
|
*slevel = oid->subs[sub];
|
|
|
|
return (0);
|
|
}
|
|
|
|
struct vacm_access *
|
|
vacm_get_access_rule(const struct asn_oid *oid, uint sub)
|
|
{
|
|
int32_t smodel, slevel;
|
|
char gname[SNMP_ADM_STR32_SIZ], prefix[SNMP_ADM_STR32_SIZ];
|
|
struct vacm_access *acl;
|
|
|
|
if (vacm_access_rule_index_decode(oid, sub, gname, prefix, &smodel,
|
|
&slevel) < 0)
|
|
return (NULL);
|
|
|
|
for (acl = vacm_first_access_rule(); acl != NULL;
|
|
acl = vacm_next_access_rule(acl))
|
|
if (strcmp(gname, acl->group->groupname) == 0 &&
|
|
strcmp(prefix, acl->ctx_prefix) == 0 &&
|
|
smodel == acl->sec_model && slevel == acl->sec_level)
|
|
return (acl);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
struct vacm_access *
|
|
vacm_get_next_access_rule(const struct asn_oid *oid __unused, uint sub __unused)
|
|
{
|
|
int32_t smodel, slevel;
|
|
char gname[SNMP_ADM_STR32_SIZ], prefix[SNMP_ADM_STR32_SIZ];
|
|
struct vacm_access *acl;
|
|
|
|
if (oid->len - sub == 0)
|
|
return (vacm_first_access_rule());
|
|
|
|
if (vacm_access_rule_index_decode(oid, sub, gname, prefix, &smodel,
|
|
&slevel) < 0)
|
|
return (NULL);
|
|
|
|
for (acl = vacm_first_access_rule(); acl != NULL;
|
|
acl = vacm_next_access_rule(acl))
|
|
if (strcmp(gname, acl->group->groupname) == 0 &&
|
|
strcmp(prefix, acl->ctx_prefix) == 0 &&
|
|
smodel == acl->sec_model && slevel == acl->sec_model)
|
|
return (vacm_next_access_rule(acl));
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
vacm_view_index_decode(const struct asn_oid *oid, uint sub, char *vname,
|
|
struct asn_oid *view_oid)
|
|
{
|
|
uint32_t i;
|
|
int viod_off;
|
|
|
|
if (oid->subs[sub] >= SNMP_ADM_STR32_SIZ)
|
|
return (-1);
|
|
|
|
for (i = 0; i < oid->subs[sub]; i++)
|
|
vname[i] = oid->subs[sub + i + 1];
|
|
vname[i] = '\0';
|
|
|
|
viod_off = sub + oid->subs[sub] + 1;
|
|
if ((view_oid->len = oid->subs[viod_off]) > ASN_MAXOIDLEN)
|
|
return (-1);
|
|
|
|
memcpy(&view_oid->subs[0], &oid->subs[viod_off + 1],
|
|
view_oid->len * sizeof(view_oid->subs[0]));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vacm_append_viewindex(struct asn_oid *oid, uint sub, const struct vacm_view *view)
|
|
{
|
|
uint32_t i;
|
|
|
|
oid->len = sub + strlen(view->viewname) + 1;
|
|
oid->subs[sub] = strlen(view->viewname);
|
|
for (i = 1; i <= strlen(view->viewname); i++)
|
|
oid->subs[sub + i] = view->viewname[i - 1];
|
|
|
|
sub += strlen(view->viewname) + 1;
|
|
oid->subs[sub] = view->subtree.len;
|
|
oid->len++;
|
|
asn_append_oid(oid, &view->subtree);
|
|
}
|
|
|
|
struct vacm_view *
|
|
vacm_get_view(const struct asn_oid *oid, uint sub)
|
|
{
|
|
char vname[SNMP_ADM_STR32_SIZ];
|
|
struct asn_oid subtree;
|
|
struct vacm_view *view;
|
|
|
|
if (vacm_view_index_decode(oid, sub, vname, &subtree) < 0)
|
|
return (NULL);
|
|
|
|
for (view = vacm_first_view(); view != NULL; view = vacm_next_view(view))
|
|
if (strcmp(vname, view->viewname) == 0 &&
|
|
asn_compare_oid(&subtree, &view->subtree)== 0)
|
|
return (view);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
struct vacm_view *
|
|
vacm_get_next_view(const struct asn_oid *oid, uint sub)
|
|
{
|
|
char vname[SNMP_ADM_STR32_SIZ];
|
|
struct asn_oid subtree;
|
|
struct vacm_view *view;
|
|
|
|
if (oid->len - sub == 0)
|
|
return (vacm_first_view());
|
|
|
|
if (vacm_view_index_decode(oid, sub, vname, &subtree) < 0)
|
|
return (NULL);
|
|
|
|
for (view = vacm_first_view(); view != NULL; view = vacm_next_view(view))
|
|
if (strcmp(vname, view->viewname) == 0 &&
|
|
asn_compare_oid(&subtree, &view->subtree)== 0)
|
|
return (vacm_next_view(view));
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static struct vacm_view *
|
|
vacm_get_view_by_name(u_char *octets, u_int len)
|
|
{
|
|
struct vacm_view *view;
|
|
|
|
for (view = vacm_first_view(); view != NULL; view = vacm_next_view(view))
|
|
if (strlen(view->viewname) == len &&
|
|
memcmp(octets, view->viewname, len) == 0)
|
|
return (view);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static struct vacm_context *
|
|
vacm_get_context(const struct asn_oid *oid, uint sub)
|
|
{
|
|
char cname[SNMP_ADM_STR32_SIZ];
|
|
size_t cnamelen;
|
|
u_int index_count;
|
|
struct vacm_context *vacm_ctx;
|
|
|
|
if (oid->subs[sub] >= SNMP_ADM_STR32_SIZ)
|
|
return (NULL);
|
|
|
|
index_count = 0;
|
|
index_count = SNMP_INDEX(index_count, 1);
|
|
if (index_decode(oid, sub, index_count, &cname, &cnamelen))
|
|
return (NULL);
|
|
|
|
for (vacm_ctx = vacm_first_context(); vacm_ctx != NULL;
|
|
vacm_ctx = vacm_next_context(vacm_ctx))
|
|
if (strcmp(cname, vacm_ctx->ctxname) == 0)
|
|
return (vacm_ctx);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static struct vacm_context *
|
|
vacm_get_next_context(const struct asn_oid *oid, uint sub)
|
|
{
|
|
char cname[SNMP_ADM_STR32_SIZ];
|
|
size_t cnamelen;
|
|
u_int index_count;
|
|
struct vacm_context *vacm_ctx;
|
|
|
|
if (oid->len - sub == 0)
|
|
return (vacm_first_context());
|
|
|
|
if (oid->subs[sub] >= SNMP_ADM_STR32_SIZ)
|
|
return (NULL);
|
|
|
|
index_count = 0;
|
|
index_count = SNMP_INDEX(index_count, 1);
|
|
if (index_decode(oid, sub, index_count, &cname, &cnamelen))
|
|
return (NULL);
|
|
|
|
for (vacm_ctx = vacm_first_context(); vacm_ctx != NULL;
|
|
vacm_ctx = vacm_next_context(vacm_ctx))
|
|
if (strcmp(cname, vacm_ctx->ctxname) == 0)
|
|
return (vacm_next_context(vacm_ctx));
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
static void
|
|
vacm_append_ctxindex(struct asn_oid *oid, uint sub,
|
|
const struct vacm_context *ctx)
|
|
{
|
|
uint32_t i;
|
|
|
|
oid->len = sub + strlen(ctx->ctxname) + 1;
|
|
oid->subs[sub] = strlen(ctx->ctxname);
|
|
for (i = 1; i <= strlen(ctx->ctxname); i++)
|
|
oid->subs[sub + i] = ctx->ctxname[i - 1];
|
|
}
|
|
|
|
/*
|
|
* VACM snmp module initialization hook.
|
|
* Returns 0 on success, < 0 on error.
|
|
*/
|
|
static int
|
|
vacm_init(struct lmodule *mod, int argc __unused, char *argv[] __unused)
|
|
{
|
|
vacm_module = mod;
|
|
vacm_lock = random();
|
|
vacm_groups_init();
|
|
|
|
/* XXX: TODO - initialize structures */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* VACM snmp module finalization hook.
|
|
*/
|
|
static int
|
|
vacm_fini(void)
|
|
{
|
|
/* XXX: TODO - cleanup */
|
|
vacm_flush_contexts(reg_vacm);
|
|
or_unregister(reg_vacm);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* VACM snmp module start operation.
|
|
*/
|
|
static void
|
|
vacm_start(void)
|
|
{
|
|
static char dflt_ctx[] = "";
|
|
|
|
reg_vacm = or_register(&oid_vacm,
|
|
"The MIB module for managing SNMP View-based Access Control Model.",
|
|
vacm_module);
|
|
|
|
(void)vacm_add_context(dflt_ctx, reg_vacm);
|
|
}
|
|
|
|
static void
|
|
vacm_dump(void)
|
|
{
|
|
struct vacm_context *vacmctx;
|
|
struct vacm_user *vuser;
|
|
struct vacm_access *vacl;
|
|
struct vacm_view *view;
|
|
static char oidbuf[ASN_OIDSTRLEN];
|
|
|
|
syslog(LOG_ERR, "\n");
|
|
syslog(LOG_ERR, "Context list:");
|
|
for (vacmctx = vacm_first_context(); vacmctx != NULL;
|
|
vacmctx = vacm_next_context(vacmctx))
|
|
syslog(LOG_ERR, "Context \"%s\", module id %d",
|
|
vacmctx->ctxname, vacmctx->regid);
|
|
|
|
syslog(LOG_ERR, "VACM users:");
|
|
for (vuser = vacm_first_user(); vuser != NULL;
|
|
vuser = vacm_next_user(vuser))
|
|
syslog(LOG_ERR, "Uname %s, Group %s, model %d", vuser->secname,
|
|
vuser->group!= NULL?vuser->group->groupname:"Unknown",
|
|
vuser->sec_model);
|
|
|
|
syslog(LOG_ERR, "VACM Access rules:");
|
|
for (vacl = vacm_first_access_rule(); vacl != NULL;
|
|
vacl = vacm_next_access_rule(vacl))
|
|
syslog(LOG_ERR, "Group %s, CtxPrefix %s, Model %d, Level %d, "
|
|
"RV %s, WR %s, NV %s", vacl->group!=NULL?
|
|
vacl->group->groupname:"Unknown", vacl->ctx_prefix,
|
|
vacl->sec_model, vacl->sec_level, vacl->read_view!=NULL?
|
|
vacl->read_view->viewname:"None", vacl->write_view!=NULL?
|
|
vacl->write_view->viewname:"None", vacl->notify_view!=NULL?
|
|
vacl->notify_view->viewname:"None");
|
|
|
|
syslog(LOG_ERR, "VACM Views:");
|
|
for (view = vacm_first_view(); view != NULL; view = vacm_next_view(view))
|
|
syslog(LOG_ERR, "View %s, Tree %s - %s", view->viewname,
|
|
asn_oid2str_r(&view->subtree, oidbuf), view->exclude?
|
|
"excluded":"included");
|
|
}
|
|
|
|
const char vacm_comment[] = \
|
|
"This module implements SNMP View-based Access Control Model defined in RFC 3415.";
|
|
|
|
const struct snmp_module config = {
|
|
.comment = vacm_comment,
|
|
.init = vacm_init,
|
|
.fini = vacm_fini,
|
|
.start = vacm_start,
|
|
.tree = vacm_ctree,
|
|
.dump = vacm_dump,
|
|
.tree_size = vacm_CTREE_SIZE,
|
|
};
|