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Release 4.15 net/rxrpc/security.c

Directory: net/rxrpc
/* RxRPC security handling
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <linux/udp.h>
#include <linux/crypto.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include <keys/rxrpc-type.h>
#include "ar-internal.h"

static LIST_HEAD(rxrpc_security_methods);
static DECLARE_RWSEM(rxrpc_security_sem);


static const struct rxrpc_security *rxrpc_security_types[] = {
	[RXRPC_SECURITY_NONE]	= &rxrpc_no_security,
#ifdef CONFIG_RXKAD
	[RXRPC_SECURITY_RXKAD]	= &rxkad,
#endif
};


int __init rxrpc_init_security(void) { int i, ret; for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++) { if (rxrpc_security_types[i]) { ret = rxrpc_security_types[i]->init(); if (ret < 0) goto failed; } } return 0; failed: for (i--; i >= 0; i--) if (rxrpc_security_types[i]) rxrpc_security_types[i]->exit(); return ret; }

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David Howells94100.00%2100.00%
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void rxrpc_exit_security(void) { int i; for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++) if (rxrpc_security_types[i]) rxrpc_security_types[i]->exit(); }

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David Howells41100.00%2100.00%
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/* * look up an rxrpc security module */
static const struct rxrpc_security *rxrpc_security_lookup(u8 security_index) { if (security_index >= ARRAY_SIZE(rxrpc_security_types)) return NULL; return rxrpc_security_types[security_index]; }

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David Howells30100.00%2100.00%
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/* * initialise the security on a client connection */
int rxrpc_init_client_conn_security(struct rxrpc_connection *conn) { const struct rxrpc_security *sec; struct rxrpc_key_token *token; struct key *key = conn->params.key; int ret; _enter("{%d},{%x}", conn->debug_id, key_serial(key)); if (!key) return 0; ret = key_validate(key); if (ret < 0) return ret; token = key->payload.data[0]; if (!token) return -EKEYREJECTED; sec = rxrpc_security_lookup(token->security_index); if (!sec) return -EKEYREJECTED; conn->security = sec; ret = conn->security->init_connection_security(conn); if (ret < 0) { conn->security = &rxrpc_no_security; return ret; } _leave(" = 0"); return 0; }

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David Howells154100.00%6100.00%
Total154100.00%6100.00%

/* * initialise the security on a server connection */
int rxrpc_init_server_conn_security(struct rxrpc_connection *conn) { const struct rxrpc_security *sec; struct rxrpc_local *local = conn->params.local; struct rxrpc_sock *rx; struct key *key; key_ref_t kref; char kdesc[5 + 1 + 3 + 1]; _enter(""); sprintf(kdesc, "%u:%u", conn->service_id, conn->security_ix); sec = rxrpc_security_lookup(conn->security_ix); if (!sec) { _leave(" = -ENOKEY [lookup]"); return -ENOKEY; } /* find the service */ read_lock(&local->services_lock); rx = rcu_dereference_protected(local->service, lockdep_is_held(&local->services_lock)); if (rx && (rx->srx.srx_service == conn->service_id || rx->second_service == conn->service_id)) goto found_service; /* the service appears to have died */ read_unlock(&local->services_lock); _leave(" = -ENOENT"); return -ENOENT; found_service: if (!rx->securities) { read_unlock(&local->services_lock); _leave(" = -ENOKEY"); return -ENOKEY; } /* look through the service's keyring */ kref = keyring_search(make_key_ref(rx->securities, 1UL), &key_type_rxrpc_s, kdesc); if (IS_ERR(kref)) { read_unlock(&local->services_lock); _leave(" = %ld [search]", PTR_ERR(kref)); return PTR_ERR(kref); } key = key_ref_to_ptr(kref); read_unlock(&local->services_lock); conn->server_key = key; conn->security = sec; _leave(" = 0"); return 0; }

Contributors

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David Howells284100.00%7100.00%
Total284100.00%7100.00%


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David Howells676100.00%11100.00%
Total676100.00%11100.00%
Directory: net/rxrpc
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