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rxrpc: Split the server key type (rxrpc_s) into its own file
Split the server private key type (rxrpc_s) out into its own file rather than mingling it with the authentication/client key type (rxrpc) since they don't really bear any relation. Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
parent
ec832bd06d
commit
ca7fb10059
@ -28,6 +28,7 @@ rxrpc-y := \
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rtt.o \
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security.o \
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sendmsg.o \
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server_key.o \
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skbuff.o \
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utils.o
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@ -906,10 +906,8 @@ extern const struct rxrpc_security rxrpc_no_security;
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* key.c
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*/
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extern struct key_type key_type_rxrpc;
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extern struct key_type key_type_rxrpc_s;
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int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
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int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
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int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
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u32);
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@ -1064,6 +1062,13 @@ struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
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*/
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int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
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/*
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* server_key.c
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*/
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extern struct key_type key_type_rxrpc_s;
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int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
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/*
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* skbuff.c
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*/
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125
net/rxrpc/key.c
125
net/rxrpc/key.c
@ -23,15 +23,10 @@
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#include <keys/user-type.h>
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#include "ar-internal.h"
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static int rxrpc_vet_description_s(const char *);
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static int rxrpc_preparse(struct key_preparsed_payload *);
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static int rxrpc_preparse_s(struct key_preparsed_payload *);
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static void rxrpc_free_preparse(struct key_preparsed_payload *);
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static void rxrpc_free_preparse_s(struct key_preparsed_payload *);
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static void rxrpc_destroy(struct key *);
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static void rxrpc_destroy_s(struct key *);
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static void rxrpc_describe(const struct key *, struct seq_file *);
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static void rxrpc_describe_s(const struct key *, struct seq_file *);
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static long rxrpc_read(const struct key *, char *, size_t);
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/*
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@ -50,38 +45,6 @@ struct key_type key_type_rxrpc = {
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};
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EXPORT_SYMBOL(key_type_rxrpc);
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/*
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* rxrpc server defined keys take "<serviceId>:<securityIndex>" as the
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* description and an 8-byte decryption key as the payload
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*/
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struct key_type key_type_rxrpc_s = {
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.name = "rxrpc_s",
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.flags = KEY_TYPE_NET_DOMAIN,
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.vet_description = rxrpc_vet_description_s,
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.preparse = rxrpc_preparse_s,
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.free_preparse = rxrpc_free_preparse_s,
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.instantiate = generic_key_instantiate,
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.destroy = rxrpc_destroy_s,
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.describe = rxrpc_describe_s,
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};
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/*
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* Vet the description for an RxRPC server key
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*/
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static int rxrpc_vet_description_s(const char *desc)
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{
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unsigned long num;
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char *p;
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num = simple_strtoul(desc, &p, 10);
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if (*p != ':' || num > 65535)
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return -EINVAL;
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num = simple_strtoul(p + 1, &p, 10);
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if (*p || num < 1 || num > 255)
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return -EINVAL;
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return 0;
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}
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/*
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* parse an RxKAD type XDR format token
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* - the caller guarantees we have at least 4 words
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@ -433,45 +396,6 @@ static void rxrpc_free_preparse(struct key_preparsed_payload *prep)
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rxrpc_free_token_list(prep->payload.data[0]);
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}
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/*
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* Preparse a server secret key.
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*
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* The data should be the 8-byte secret key.
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*/
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static int rxrpc_preparse_s(struct key_preparsed_payload *prep)
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{
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struct crypto_skcipher *ci;
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_enter("%zu", prep->datalen);
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if (prep->datalen != 8)
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return -EINVAL;
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memcpy(&prep->payload.data[2], prep->data, 8);
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ci = crypto_alloc_skcipher("pcbc(des)", 0, CRYPTO_ALG_ASYNC);
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if (IS_ERR(ci)) {
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_leave(" = %ld", PTR_ERR(ci));
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return PTR_ERR(ci);
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}
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if (crypto_skcipher_setkey(ci, prep->data, 8) < 0)
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BUG();
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prep->payload.data[0] = ci;
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_leave(" = 0");
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return 0;
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}
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/*
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* Clean up preparse data.
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*/
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static void rxrpc_free_preparse_s(struct key_preparsed_payload *prep)
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{
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if (prep->payload.data[0])
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crypto_free_skcipher(prep->payload.data[0]);
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}
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/*
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* dispose of the data dangling from the corpse of a rxrpc key
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*/
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@ -480,17 +404,6 @@ static void rxrpc_destroy(struct key *key)
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rxrpc_free_token_list(key->payload.data[0]);
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}
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/*
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* dispose of the data dangling from the corpse of a rxrpc key
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*/
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static void rxrpc_destroy_s(struct key *key)
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{
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if (key->payload.data[0]) {
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crypto_free_skcipher(key->payload.data[0]);
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key->payload.data[0] = NULL;
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}
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}
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/*
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* describe the rxrpc key
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*/
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@ -517,14 +430,6 @@ static void rxrpc_describe(const struct key *key, struct seq_file *m)
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}
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}
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/*
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* describe the rxrpc server key
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*/
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static void rxrpc_describe_s(const struct key *key, struct seq_file *m)
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{
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seq_puts(m, key->description);
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}
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/*
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* grab the security key for a socket
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*/
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@ -555,36 +460,6 @@ int rxrpc_request_key(struct rxrpc_sock *rx, sockptr_t optval, int optlen)
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return 0;
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}
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/*
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* grab the security keyring for a server socket
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*/
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int rxrpc_server_keyring(struct rxrpc_sock *rx, sockptr_t optval, int optlen)
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{
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struct key *key;
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char *description;
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_enter("");
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if (optlen <= 0 || optlen > PAGE_SIZE - 1)
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return -EINVAL;
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description = memdup_sockptr_nul(optval, optlen);
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if (IS_ERR(description))
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return PTR_ERR(description);
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key = request_key(&key_type_keyring, description, NULL);
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if (IS_ERR(key)) {
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kfree(description);
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_leave(" = %ld", PTR_ERR(key));
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return PTR_ERR(key);
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}
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rx->securities = key;
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kfree(description);
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_leave(" = 0 [key %x]", key->serial);
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return 0;
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}
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/*
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* generate a server data key
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*/
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141
net/rxrpc/server_key.c
Normal file
141
net/rxrpc/server_key.c
Normal file
@ -0,0 +1,141 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/* RxRPC key management
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* RxRPC keys should have a description of describing their purpose:
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* "afs@CAMBRIDGE.REDHAT.COM>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <crypto/skcipher.h>
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#include <linux/module.h>
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#include <linux/net.h>
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#include <linux/skbuff.h>
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#include <linux/key-type.h>
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include <keys/rxrpc-type.h>
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#include <keys/user-type.h>
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#include "ar-internal.h"
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static int rxrpc_vet_description_s(const char *);
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static int rxrpc_preparse_s(struct key_preparsed_payload *);
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static void rxrpc_free_preparse_s(struct key_preparsed_payload *);
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static void rxrpc_destroy_s(struct key *);
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static void rxrpc_describe_s(const struct key *, struct seq_file *);
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/*
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* rxrpc server defined keys take "<serviceId>:<securityIndex>" as the
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* description and an 8-byte decryption key as the payload
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*/
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struct key_type key_type_rxrpc_s = {
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.name = "rxrpc_s",
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.flags = KEY_TYPE_NET_DOMAIN,
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.vet_description = rxrpc_vet_description_s,
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.preparse = rxrpc_preparse_s,
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.free_preparse = rxrpc_free_preparse_s,
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.instantiate = generic_key_instantiate,
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.destroy = rxrpc_destroy_s,
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.describe = rxrpc_describe_s,
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};
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/*
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* Vet the description for an RxRPC server key
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*/
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static int rxrpc_vet_description_s(const char *desc)
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{
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unsigned long num;
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char *p;
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num = simple_strtoul(desc, &p, 10);
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if (*p != ':' || num > 65535)
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return -EINVAL;
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num = simple_strtoul(p + 1, &p, 10);
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if (*p || num < 1 || num > 255)
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return -EINVAL;
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return 0;
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}
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/*
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* Preparse a server secret key.
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*
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* The data should be the 8-byte secret key.
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*/
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static int rxrpc_preparse_s(struct key_preparsed_payload *prep)
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{
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struct crypto_skcipher *ci;
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_enter("%zu", prep->datalen);
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if (prep->datalen != 8)
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return -EINVAL;
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memcpy(&prep->payload.data[2], prep->data, 8);
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ci = crypto_alloc_skcipher("pcbc(des)", 0, CRYPTO_ALG_ASYNC);
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if (IS_ERR(ci)) {
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_leave(" = %ld", PTR_ERR(ci));
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return PTR_ERR(ci);
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}
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if (crypto_skcipher_setkey(ci, prep->data, 8) < 0)
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BUG();
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prep->payload.data[0] = ci;
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_leave(" = 0");
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return 0;
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}
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static void rxrpc_free_preparse_s(struct key_preparsed_payload *prep)
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{
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if (prep->payload.data[0])
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crypto_free_skcipher(prep->payload.data[0]);
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}
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static void rxrpc_destroy_s(struct key *key)
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{
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if (key->payload.data[0]) {
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crypto_free_skcipher(key->payload.data[0]);
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key->payload.data[0] = NULL;
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}
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}
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static void rxrpc_describe_s(const struct key *key, struct seq_file *m)
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{
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seq_puts(m, key->description);
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}
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/*
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* grab the security keyring for a server socket
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*/
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int rxrpc_server_keyring(struct rxrpc_sock *rx, sockptr_t optval, int optlen)
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{
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struct key *key;
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char *description;
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_enter("");
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if (optlen <= 0 || optlen > PAGE_SIZE - 1)
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return -EINVAL;
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description = memdup_sockptr_nul(optval, optlen);
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if (IS_ERR(description))
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return PTR_ERR(description);
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key = request_key(&key_type_keyring, description, NULL);
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if (IS_ERR(key)) {
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kfree(description);
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_leave(" = %ld", PTR_ERR(key));
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return PTR_ERR(key);
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}
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rx->securities = key;
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kfree(description);
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_leave(" = 0 [key %x]", key->serial);
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return 0;
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}
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