[net-next,15/17] rxrpc: Organise connection security to use a union

Message ID	160616230898.830164.7298470680786861832.stgit@warthog.procyon.org.uk
State	Superseded
Headers	show Return-Path: <netdev-owner@vger.kernel.org> Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH net-next 15/17] rxrpc: Organise connection security to use a union From: David Howells <dhowells@redhat.com> To: netdev@vger.kernel.org Cc: dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org Date: Mon, 23 Nov 2020 20:11:49 +0000 Message-ID: <160616230898.830164.7298470680786861832.stgit@warthog.procyon.org.uk> In-Reply-To: <160616220405.830164.2239716599743995145.stgit@warthog.procyon.org.uk> References: <160616220405.830164.2239716599743995145.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk
Series	rxrpc: Prelude to gssapi support \| expand [net,00/17] rxrpc: Prelude to gssapi support [net-next,01/17] keys: Provide the original description to the key preparser [net-next,02/17] rxrpc: Remove the rxk5 security class as it's now defunct [net-next,03/17] rxrpc: List the held token types in the key description in /proc/keys [net-next,04/17] rxrpc: Support keys with multiple authentication tokens [net-next,05/17] rxrpc: Don't retain the server key in the connection [net-next,06/17] rxrpc: Split the server key type (rxrpc_s) into its own file [net-next,07/17] rxrpc: Hand server key parsing off to the security class [net-next,08/17] rxrpc: Don't leak the service-side session key to userspace [net-next,09/17] rxrpc: Allow security classes to give more info on server keys [net-next,10/17] rxrpc: Make the parsing of xdr payloads more coherent [net-next,11/17] rxrpc: Ignore unknown tokens in key payload unless no known tokens [net-next,12/17] rxrpc: Fix example key name in a comment [net-next,13/17] rxrpc: Merge prime_packet_security into init_connection_security [net-next,14/17] rxrpc: Don't reserve security header in Tx DATA skbuff [net-next,15/17] rxrpc: Organise connection security to use a union [net-next,16/17] rxrpc: rxkad: Don't use pskb_pull() to advance through the response packet [net-next,17/17] rxrpc: Ask the security class how much space to allow in a packet

diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 742a69fb8e60..fda6618df1cc 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -448,9 +448,15 @@ struct rxrpc_connection { struct list_head proc_link; /* link in procfs list */ struct list_head link; /* link in master connection list */ struct sk_buff_head rx_queue; /* received conn-level packets */ + const struct rxrpc_security *security; /* applied security module */ - struct crypto_sync_skcipher *cipher; /* encryption handle */ - struct rxrpc_crypt csum_iv; /* packet checksum base */ + union { + struct { + struct crypto_sync_skcipher *cipher; /* encryption handle */ + struct rxrpc_crypt csum_iv; /* packet checksum base */ + u32 nonce; /* response re-use preventer */ + } rxkad; + }; unsigned long flags; unsigned long events; unsigned long idle_timestamp; /* Time at which last became idle */ @@ -460,7 +466,6 @@ struct rxrpc_connection { int debug_id; /* debug ID for printks */ atomic_t serial; /* packet serial number counter */ unsigned int hi_serial; /* highest serial number received */ - u32 security_nonce; /* response re-use preventer */ u32 service_id; /* Service ID, possibly upgraded */ u8 size_align; /* data size alignment (for security) */ u8 security_size; /* security header size */ diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c index 37335d887570..f3182edfcbae 100644 --- a/net/rxrpc/rxkad.c +++ b/net/rxrpc/rxkad.c @@ -137,7 +137,7 @@ static int rxkad_init_connection_security(struct rxrpc_connection *conn, if (ret < 0) goto error_ci; - conn->cipher = ci; + conn->rxkad.cipher = ci; return 0; error_ci: @@ -191,7 +191,7 @@ static int rxkad_prime_packet_security(struct rxrpc_connection *conn, crypto_skcipher_encrypt(req); skcipher_request_free(req); - memcpy(&conn->csum_iv, tmpbuf + 2, sizeof(conn->csum_iv)); + memcpy(&conn->rxkad.csum_iv, tmpbuf + 2, sizeof(conn->rxkad.csum_iv)); kfree(tmpbuf); _leave(" = 0"); return 0; @@ -203,7 +203,7 @@ static int rxkad_prime_packet_security(struct rxrpc_connection *conn, */ static struct skcipher_request *rxkad_get_call_crypto(struct rxrpc_call *call) { - struct crypto_skcipher *tfm = &call->conn->cipher->base; + struct crypto_skcipher *tfm = &call->conn->rxkad.cipher->base; struct skcipher_request *cipher_req = call->cipher_req; if (!cipher_req) { @@ -251,7 +251,7 @@ static int rxkad_secure_packet_auth(const struct rxrpc_call *call, memset(&iv, 0, sizeof(iv)); sg_init_one(&sg, skb->head, 8); - skcipher_request_set_sync_tfm(req, call->conn->cipher); + skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher); skcipher_request_set_callback(req, 0, NULL, NULL); skcipher_request_set_crypt(req, &sg, &sg, 8, iv.x); crypto_skcipher_encrypt(req); @@ -293,7 +293,7 @@ static int rxkad_secure_packet_encrypt(const struct rxrpc_call *call, memcpy(&iv, token->kad->session_key, sizeof(iv)); sg_init_one(&sg[0], skb->head, sizeof(rxkhdr)); - skcipher_request_set_sync_tfm(req, call->conn->cipher); + skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher); skcipher_request_set_callback(req, 0, NULL, NULL); skcipher_request_set_crypt(req, &sg[0], &sg[0], sizeof(rxkhdr), iv.x); crypto_skcipher_encrypt(req); @@ -341,7 +341,7 @@ static int rxkad_secure_packet(struct rxrpc_call *call, call->debug_id, key_serial(call->conn->params.key), sp->hdr.seq, data_size); - if (!call->conn->cipher) + if (!call->conn->rxkad.cipher) return 0; ret = key_validate(call->conn->params.key); @@ -353,7 +353,7 @@ static int rxkad_secure_packet(struct rxrpc_call *call, return -ENOMEM; /* continue encrypting from where we left off */ - memcpy(&iv, call->conn->csum_iv.x, sizeof(iv)); + memcpy(&iv, call->conn->rxkad.csum_iv.x, sizeof(iv)); /* calculate the security checksum */ x = (call->cid & RXRPC_CHANNELMASK) << (32 - RXRPC_CIDSHIFT); @@ -362,7 +362,7 @@ static int rxkad_secure_packet(struct rxrpc_call *call, call->crypto_buf[1] = htonl(x); sg_init_one(&sg, call->crypto_buf, 8); - skcipher_request_set_sync_tfm(req, call->conn->cipher); + skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher); skcipher_request_set_callback(req, 0, NULL, NULL); skcipher_request_set_crypt(req, &sg, &sg, 8, iv.x); crypto_skcipher_encrypt(req); @@ -428,7 +428,7 @@ static int rxkad_verify_packet_1(struct rxrpc_call *call, struct sk_buff *skb, /* start the decryption afresh */ memset(&iv, 0, sizeof(iv)); - skcipher_request_set_sync_tfm(req, call->conn->cipher); + skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher); skcipher_request_set_callback(req, 0, NULL, NULL); skcipher_request_set_crypt(req, sg, sg, 8, iv.x); crypto_skcipher_decrypt(req); @@ -520,7 +520,7 @@ static int rxkad_verify_packet_2(struct rxrpc_call *call, struct sk_buff *skb, token = call->conn->params.key->payload.data[0]; memcpy(&iv, token->kad->session_key, sizeof(iv)); - skcipher_request_set_sync_tfm(req, call->conn->cipher); + skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher); skcipher_request_set_callback(req, 0, NULL, NULL); skcipher_request_set_crypt(req, sg, sg, len, iv.x); crypto_skcipher_decrypt(req); @@ -586,7 +586,7 @@ static int rxkad_verify_packet(struct rxrpc_call *call, struct sk_buff *skb, _enter("{%d{%x}},{#%u}", call->debug_id, key_serial(call->conn->params.key), seq); - if (!call->conn->cipher) + if (!call->conn->rxkad.cipher) return 0; req = rxkad_get_call_crypto(call); @@ -594,7 +594,7 @@ static int rxkad_verify_packet(struct rxrpc_call *call, struct sk_buff *skb, return -ENOMEM; /* continue encrypting from where we left off */ - memcpy(&iv, call->conn->csum_iv.x, sizeof(iv)); + memcpy(&iv, call->conn->rxkad.csum_iv.x, sizeof(iv)); /* validate the security checksum */ x = (call->cid & RXRPC_CHANNELMASK) << (32 - RXRPC_CIDSHIFT); @@ -603,7 +603,7 @@ static int rxkad_verify_packet(struct rxrpc_call *call, struct sk_buff *skb, call->crypto_buf[1] = htonl(x); sg_init_one(&sg, call->crypto_buf, 8); - skcipher_request_set_sync_tfm(req, call->conn->cipher); + skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher); skcipher_request_set_callback(req, 0, NULL, NULL); skcipher_request_set_crypt(req, &sg, &sg, 8, iv.x); crypto_skcipher_encrypt(req); @@ -698,10 +698,10 @@ static int rxkad_issue_challenge(struct rxrpc_connection *conn) _enter("{%d}", conn->debug_id); - get_random_bytes(&conn->security_nonce, sizeof(conn->security_nonce)); + get_random_bytes(&conn->rxkad.nonce, sizeof(conn->rxkad.nonce)); challenge.version = htonl(2); - challenge.nonce = htonl(conn->security_nonce); + challenge.nonce = htonl(conn->rxkad.nonce); challenge.min_level = htonl(0); challenge.__padding = 0; @@ -829,7 +829,7 @@ static int rxkad_encrypt_response(struct rxrpc_connection *conn, struct rxrpc_crypt iv; struct scatterlist sg[1]; - req = skcipher_request_alloc(&conn->cipher->base, GFP_NOFS); + req = skcipher_request_alloc(&conn->rxkad.cipher->base, GFP_NOFS); if (!req) return -ENOMEM; @@ -838,7 +838,7 @@ static int rxkad_encrypt_response(struct rxrpc_connection *conn, sg_init_table(sg, 1); sg_set_buf(sg, &resp->encrypted, sizeof(resp->encrypted)); - skcipher_request_set_sync_tfm(req, conn->cipher); + skcipher_request_set_sync_tfm(req, conn->rxkad.cipher); skcipher_request_set_callback(req, 0, NULL, NULL); skcipher_request_set_crypt(req, sg, sg, sizeof(resp->encrypted), iv.x); crypto_skcipher_encrypt(req); @@ -1249,7 +1249,7 @@ static int rxkad_verify_response(struct rxrpc_connection *conn, eproto = tracepoint_string("rxkad_rsp_seq"); abort_code = RXKADOUTOFSEQUENCE; - if (ntohl(response->encrypted.inc_nonce) != conn->security_nonce + 1) + if (ntohl(response->encrypted.inc_nonce) != conn->rxkad.nonce + 1) goto protocol_error_free; eproto = tracepoint_string("rxkad_rsp_level"); @@ -1302,8 +1302,8 @@ static void rxkad_clear(struct rxrpc_connection *conn) { _enter(""); - if (conn->cipher) - crypto_free_sync_skcipher(conn->cipher); + if (conn->rxkad.cipher) + crypto_free_sync_skcipher(conn->rxkad.cipher); } /*

[net-next,15/17] rxrpc: Organise connection security to use a union

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