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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 02/17] rxrpc: Remove the rxk5 security class as it's now defunct From: David Howells To: netdev@vger.kernel.org Cc: dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org Date: Mon, 23 Nov 2020 20:10:18 +0000 Message-ID: <160616221862.830164.11826685138543372768.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 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Remove the rxrpc rxk5 security class as it's now defunct and nothing uses it anymore. Signed-off-by: David Howells --- include/keys/rxrpc-type.h | 55 ----- net/rxrpc/key.c | 468 --------------------------------------------- 2 files changed, 523 deletions(-) diff --git a/include/keys/rxrpc-type.h b/include/keys/rxrpc-type.h index 2b0b15a71228..8e4ced9b4ecf 100644 --- a/include/keys/rxrpc-type.h +++ b/include/keys/rxrpc-type.h @@ -31,54 +31,6 @@ struct rxkad_key { u8 ticket[]; /* the encrypted ticket */ }; -/* - * Kerberos 5 principal - * name/name/name@realm - */ -struct krb5_principal { - u8 n_name_parts; /* N of parts of the name part of the principal */ - char **name_parts; /* parts of the name part of the principal */ - char *realm; /* parts of the realm part of the principal */ -}; - -/* - * Kerberos 5 tagged data - */ -struct krb5_tagged_data { - /* for tag value, see /usr/include/krb5/krb5.h - * - KRB5_AUTHDATA_* for auth data - * - - */ - s32 tag; - u32 data_len; - u8 *data; -}; - -/* - * RxRPC key for Kerberos V (type-5 security) - */ -struct rxk5_key { - u64 authtime; /* time at which auth token generated */ - u64 starttime; /* time at which auth token starts */ - u64 endtime; /* time at which auth token expired */ - u64 renew_till; /* time to which auth token can be renewed */ - s32 is_skey; /* T if ticket is encrypted in another ticket's - * skey */ - s32 flags; /* mask of TKT_FLG_* bits (krb5/krb5.h) */ - struct krb5_principal client; /* client principal name */ - struct krb5_principal server; /* server principal name */ - u16 ticket_len; /* length of ticket */ - u16 ticket2_len; /* length of second ticket */ - u8 n_authdata; /* number of authorisation data elements */ - u8 n_addresses; /* number of addresses */ - struct krb5_tagged_data session; /* session data; tag is enctype */ - struct krb5_tagged_data *addresses; /* addresses */ - u8 *ticket; /* krb5 ticket */ - u8 *ticket2; /* second krb5 ticket, if related to ticket (via - * DUPLICATE-SKEY or ENC-TKT-IN-SKEY) */ - struct krb5_tagged_data *authdata; /* authorisation data */ -}; - /* * list of tokens attached to an rxrpc key */ @@ -87,7 +39,6 @@ struct rxrpc_key_token { struct rxrpc_key_token *next; /* the next token in the list */ union { struct rxkad_key *kad; - struct rxk5_key *k5; }; }; @@ -116,12 +67,6 @@ struct rxrpc_key_data_v1 { #define AFSTOKEN_RK_TIX_MAX 12000 /* max RxKAD ticket size */ #define AFSTOKEN_GK_KEY_MAX 64 /* max GSSAPI key size */ #define AFSTOKEN_GK_TOKEN_MAX 16384 /* max GSSAPI token size */ -#define AFSTOKEN_K5_COMPONENTS_MAX 16 /* max K5 components */ -#define AFSTOKEN_K5_NAME_MAX 128 /* max K5 name length */ -#define AFSTOKEN_K5_REALM_MAX 64 /* max K5 realm name length */ -#define AFSTOKEN_K5_TIX_MAX 16384 /* max K5 ticket size */ -#define AFSTOKEN_K5_ADDRESSES_MAX 16 /* max K5 addresses */ -#define AFSTOKEN_K5_AUTHDATA_MAX 16 /* max K5 pieces of auth data */ /* * Truncate a time64_t to the range from 1970 to 2106 as in the network diff --git a/net/rxrpc/key.c b/net/rxrpc/key.c index 2e8bd3b97301..fb4d2a2fca02 100644 --- a/net/rxrpc/key.c +++ b/net/rxrpc/key.c @@ -165,391 +165,6 @@ static int rxrpc_preparse_xdr_rxkad(struct key_preparsed_payload *prep, return 0; } -static void rxrpc_free_krb5_principal(struct krb5_principal *princ) -{ - int loop; - - if (princ->name_parts) { - for (loop = princ->n_name_parts - 1; loop >= 0; loop--) - kfree(princ->name_parts[loop]); - kfree(princ->name_parts); - } - kfree(princ->realm); -} - -static void rxrpc_free_krb5_tagged(struct krb5_tagged_data *td) -{ - kfree(td->data); -} - -/* - * free up an RxK5 token - */ -static void rxrpc_rxk5_free(struct rxk5_key *rxk5) -{ - int loop; - - rxrpc_free_krb5_principal(&rxk5->client); - rxrpc_free_krb5_principal(&rxk5->server); - rxrpc_free_krb5_tagged(&rxk5->session); - - if (rxk5->addresses) { - for (loop = rxk5->n_addresses - 1; loop >= 0; loop--) - rxrpc_free_krb5_tagged(&rxk5->addresses[loop]); - kfree(rxk5->addresses); - } - if (rxk5->authdata) { - for (loop = rxk5->n_authdata - 1; loop >= 0; loop--) - rxrpc_free_krb5_tagged(&rxk5->authdata[loop]); - kfree(rxk5->authdata); - } - - kfree(rxk5->ticket); - kfree(rxk5->ticket2); - kfree(rxk5); -} - -/* - * extract a krb5 principal - */ -static int rxrpc_krb5_decode_principal(struct krb5_principal *princ, - const __be32 **_xdr, - unsigned int *_toklen) -{ - const __be32 *xdr = *_xdr; - unsigned int toklen = *_toklen, n_parts, loop, tmp, paddedlen; - - /* there must be at least one name, and at least #names+1 length - * words */ - if (toklen <= 12) - return -EINVAL; - - _enter(",{%x,%x,%x},%u", - ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), toklen); - - n_parts = ntohl(*xdr++); - toklen -= 4; - if (n_parts <= 0 || n_parts > AFSTOKEN_K5_COMPONENTS_MAX) - return -EINVAL; - princ->n_name_parts = n_parts; - - if (toklen <= (n_parts + 1) * 4) - return -EINVAL; - - princ->name_parts = kcalloc(n_parts, sizeof(char *), GFP_KERNEL); - if (!princ->name_parts) - return -ENOMEM; - - for (loop = 0; loop < n_parts; loop++) { - if (toklen < 4) - return -EINVAL; - tmp = ntohl(*xdr++); - toklen -= 4; - if (tmp <= 0 || tmp > AFSTOKEN_STRING_MAX) - return -EINVAL; - paddedlen = (tmp + 3) & ~3; - if (paddedlen > toklen) - return -EINVAL; - princ->name_parts[loop] = kmalloc(tmp + 1, GFP_KERNEL); - if (!princ->name_parts[loop]) - return -ENOMEM; - memcpy(princ->name_parts[loop], xdr, tmp); - princ->name_parts[loop][tmp] = 0; - toklen -= paddedlen; - xdr += paddedlen >> 2; - } - - if (toklen < 4) - return -EINVAL; - tmp = ntohl(*xdr++); - toklen -= 4; - if (tmp <= 0 || tmp > AFSTOKEN_K5_REALM_MAX) - return -EINVAL; - paddedlen = (tmp + 3) & ~3; - if (paddedlen > toklen) - return -EINVAL; - princ->realm = kmalloc(tmp + 1, GFP_KERNEL); - if (!princ->realm) - return -ENOMEM; - memcpy(princ->realm, xdr, tmp); - princ->realm[tmp] = 0; - toklen -= paddedlen; - xdr += paddedlen >> 2; - - _debug("%s/...@%s", princ->name_parts[0], princ->realm); - - *_xdr = xdr; - *_toklen = toklen; - _leave(" = 0 [toklen=%u]", toklen); - return 0; -} - -/* - * extract a piece of krb5 tagged data - */ -static int rxrpc_krb5_decode_tagged_data(struct krb5_tagged_data *td, - size_t max_data_size, - const __be32 **_xdr, - unsigned int *_toklen) -{ - const __be32 *xdr = *_xdr; - unsigned int toklen = *_toklen, len, paddedlen; - - /* there must be at least one tag and one length word */ - if (toklen <= 8) - return -EINVAL; - - _enter(",%zu,{%x,%x},%u", - max_data_size, ntohl(xdr[0]), ntohl(xdr[1]), toklen); - - td->tag = ntohl(*xdr++); - len = ntohl(*xdr++); - toklen -= 8; - if (len > max_data_size) - return -EINVAL; - paddedlen = (len + 3) & ~3; - if (paddedlen > toklen) - return -EINVAL; - td->data_len = len; - - if (len > 0) { - td->data = kmemdup(xdr, len, GFP_KERNEL); - if (!td->data) - return -ENOMEM; - toklen -= paddedlen; - xdr += paddedlen >> 2; - } - - _debug("tag %x len %x", td->tag, td->data_len); - - *_xdr = xdr; - *_toklen = toklen; - _leave(" = 0 [toklen=%u]", toklen); - return 0; -} - -/* - * extract an array of tagged data - */ -static int rxrpc_krb5_decode_tagged_array(struct krb5_tagged_data **_td, - u8 *_n_elem, - u8 max_n_elem, - size_t max_elem_size, - const __be32 **_xdr, - unsigned int *_toklen) -{ - struct krb5_tagged_data *td; - const __be32 *xdr = *_xdr; - unsigned int toklen = *_toklen, n_elem, loop; - int ret; - - /* there must be at least one count */ - if (toklen < 4) - return -EINVAL; - - _enter(",,%u,%zu,{%x},%u", - max_n_elem, max_elem_size, ntohl(xdr[0]), toklen); - - n_elem = ntohl(*xdr++); - toklen -= 4; - if (n_elem > max_n_elem) - return -EINVAL; - *_n_elem = n_elem; - if (n_elem > 0) { - if (toklen <= (n_elem + 1) * 4) - return -EINVAL; - - _debug("n_elem %d", n_elem); - - td = kcalloc(n_elem, sizeof(struct krb5_tagged_data), - GFP_KERNEL); - if (!td) - return -ENOMEM; - *_td = td; - - for (loop = 0; loop < n_elem; loop++) { - ret = rxrpc_krb5_decode_tagged_data(&td[loop], - max_elem_size, - &xdr, &toklen); - if (ret < 0) - return ret; - } - } - - *_xdr = xdr; - *_toklen = toklen; - _leave(" = 0 [toklen=%u]", toklen); - return 0; -} - -/* - * extract a krb5 ticket - */ -static int rxrpc_krb5_decode_ticket(u8 **_ticket, u16 *_tktlen, - const __be32 **_xdr, unsigned int *_toklen) -{ - const __be32 *xdr = *_xdr; - unsigned int toklen = *_toklen, len, paddedlen; - - /* there must be at least one length word */ - if (toklen <= 4) - return -EINVAL; - - _enter(",{%x},%u", ntohl(xdr[0]), toklen); - - len = ntohl(*xdr++); - toklen -= 4; - if (len > AFSTOKEN_K5_TIX_MAX) - return -EINVAL; - paddedlen = (len + 3) & ~3; - if (paddedlen > toklen) - return -EINVAL; - *_tktlen = len; - - _debug("ticket len %u", len); - - if (len > 0) { - *_ticket = kmemdup(xdr, len, GFP_KERNEL); - if (!*_ticket) - return -ENOMEM; - toklen -= paddedlen; - xdr += paddedlen >> 2; - } - - *_xdr = xdr; - *_toklen = toklen; - _leave(" = 0 [toklen=%u]", toklen); - return 0; -} - -/* - * parse an RxK5 type XDR format token - * - the caller guarantees we have at least 4 words - */ -static int rxrpc_preparse_xdr_rxk5(struct key_preparsed_payload *prep, - size_t datalen, - const __be32 *xdr, unsigned int toklen) -{ - struct rxrpc_key_token *token, **pptoken; - struct rxk5_key *rxk5; - const __be32 *end_xdr = xdr + (toklen >> 2); - time64_t expiry; - int ret; - - _enter(",{%x,%x,%x,%x},%u", - ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]), - toklen); - - /* reserve some payload space for this subkey - the length of the token - * is a reasonable approximation */ - prep->quotalen = datalen + toklen; - - token = kzalloc(sizeof(*token), GFP_KERNEL); - if (!token) - return -ENOMEM; - - rxk5 = kzalloc(sizeof(*rxk5), GFP_KERNEL); - if (!rxk5) { - kfree(token); - return -ENOMEM; - } - - token->security_index = RXRPC_SECURITY_RXK5; - token->k5 = rxk5; - - /* extract the principals */ - ret = rxrpc_krb5_decode_principal(&rxk5->client, &xdr, &toklen); - if (ret < 0) - goto error; - ret = rxrpc_krb5_decode_principal(&rxk5->server, &xdr, &toklen); - if (ret < 0) - goto error; - - /* extract the session key and the encoding type (the tag field -> - * ENCTYPE_xxx) */ - ret = rxrpc_krb5_decode_tagged_data(&rxk5->session, AFSTOKEN_DATA_MAX, - &xdr, &toklen); - if (ret < 0) - goto error; - - if (toklen < 4 * 8 + 2 * 4) - goto inval; - rxk5->authtime = be64_to_cpup((const __be64 *) xdr); - xdr += 2; - rxk5->starttime = be64_to_cpup((const __be64 *) xdr); - xdr += 2; - rxk5->endtime = be64_to_cpup((const __be64 *) xdr); - xdr += 2; - rxk5->renew_till = be64_to_cpup((const __be64 *) xdr); - xdr += 2; - rxk5->is_skey = ntohl(*xdr++); - rxk5->flags = ntohl(*xdr++); - toklen -= 4 * 8 + 2 * 4; - - _debug("times: a=%llx s=%llx e=%llx rt=%llx", - rxk5->authtime, rxk5->starttime, rxk5->endtime, - rxk5->renew_till); - _debug("is_skey=%x flags=%x", rxk5->is_skey, rxk5->flags); - - /* extract the permitted client addresses */ - ret = rxrpc_krb5_decode_tagged_array(&rxk5->addresses, - &rxk5->n_addresses, - AFSTOKEN_K5_ADDRESSES_MAX, - AFSTOKEN_DATA_MAX, - &xdr, &toklen); - if (ret < 0) - goto error; - - ASSERTCMP((end_xdr - xdr) << 2, ==, toklen); - - /* extract the tickets */ - ret = rxrpc_krb5_decode_ticket(&rxk5->ticket, &rxk5->ticket_len, - &xdr, &toklen); - if (ret < 0) - goto error; - ret = rxrpc_krb5_decode_ticket(&rxk5->ticket2, &rxk5->ticket2_len, - &xdr, &toklen); - if (ret < 0) - goto error; - - ASSERTCMP((end_xdr - xdr) << 2, ==, toklen); - - /* extract the typed auth data */ - ret = rxrpc_krb5_decode_tagged_array(&rxk5->authdata, - &rxk5->n_authdata, - AFSTOKEN_K5_AUTHDATA_MAX, - AFSTOKEN_BDATALN_MAX, - &xdr, &toklen); - if (ret < 0) - goto error; - - ASSERTCMP((end_xdr - xdr) << 2, ==, toklen); - - if (toklen != 0) - goto inval; - - /* attach the payload */ - for (pptoken = (struct rxrpc_key_token **)&prep->payload.data[0]; - *pptoken; - pptoken = &(*pptoken)->next) - continue; - *pptoken = token; - expiry = rxrpc_u32_to_time64(token->k5->endtime); - if (expiry < prep->expiry) - prep->expiry = expiry; - - _leave(" = 0"); - return 0; - -inval: - ret = -EINVAL; -error: - rxrpc_rxk5_free(rxk5); - kfree(token); - _leave(" = %d", ret); - return ret; -} - /* * attempt to parse the data as the XDR format * - the caller guarantees we have more than 7 words @@ -650,12 +265,6 @@ static int rxrpc_preparse_xdr(struct key_preparsed_payload *prep) goto error; break; - case RXRPC_SECURITY_RXK5: - ret = rxrpc_preparse_xdr_rxk5(prep, datalen, xdr, toklen); - if (ret != 0) - goto error; - break; - default: ret = -EPROTONOSUPPORT; goto error; @@ -805,10 +414,6 @@ static void rxrpc_free_token_list(struct rxrpc_key_token *token) case RXRPC_SECURITY_RXKAD: kfree(token->kad); break; - case RXRPC_SECURITY_RXK5: - if (token->k5) - rxrpc_rxk5_free(token->k5); - break; default: pr_err("Unknown token type %x on rxrpc key\n", token->security_index); @@ -1044,12 +649,10 @@ static long rxrpc_read(const struct key *key, char *buffer, size_t buflen) { const struct rxrpc_key_token *token; - const struct krb5_principal *princ; size_t size; __be32 *xdr, *oldxdr; u32 cnlen, toksize, ntoks, tok, zero; u16 toksizes[AFSTOKEN_MAX]; - int loop; _enter(""); @@ -1077,35 +680,6 @@ static long rxrpc_read(const struct key *key, toksize += RND(token->kad->ticket_len); break; - case RXRPC_SECURITY_RXK5: - princ = &token->k5->client; - toksize += 4 + princ->n_name_parts * 4; - for (loop = 0; loop < princ->n_name_parts; loop++) - toksize += RND(strlen(princ->name_parts[loop])); - toksize += 4 + RND(strlen(princ->realm)); - - princ = &token->k5->server; - toksize += 4 + princ->n_name_parts * 4; - for (loop = 0; loop < princ->n_name_parts; loop++) - toksize += RND(strlen(princ->name_parts[loop])); - toksize += 4 + RND(strlen(princ->realm)); - - toksize += 8 + RND(token->k5->session.data_len); - - toksize += 4 * 8 + 2 * 4; - - toksize += 4 + token->k5->n_addresses * 8; - for (loop = 0; loop < token->k5->n_addresses; loop++) - toksize += RND(token->k5->addresses[loop].data_len); - - toksize += 4 + RND(token->k5->ticket_len); - toksize += 4 + RND(token->k5->ticket2_len); - - toksize += 4 + token->k5->n_authdata * 8; - for (loop = 0; loop < token->k5->n_authdata; loop++) - toksize += RND(token->k5->authdata[loop].data_len); - break; - default: /* we have a ticket we can't encode */ pr_err("Unsupported key token type (%u)\n", token->security_index); @@ -1181,48 +755,6 @@ static long rxrpc_read(const struct key *key, ENCODE_DATA(token->kad->ticket_len, token->kad->ticket); break; - case RXRPC_SECURITY_RXK5: - princ = &token->k5->client; - ENCODE(princ->n_name_parts); - for (loop = 0; loop < princ->n_name_parts; loop++) - ENCODE_STR(princ->name_parts[loop]); - ENCODE_STR(princ->realm); - - princ = &token->k5->server; - ENCODE(princ->n_name_parts); - for (loop = 0; loop < princ->n_name_parts; loop++) - ENCODE_STR(princ->name_parts[loop]); - ENCODE_STR(princ->realm); - - ENCODE(token->k5->session.tag); - ENCODE_DATA(token->k5->session.data_len, - token->k5->session.data); - - ENCODE64(token->k5->authtime); - ENCODE64(token->k5->starttime); - ENCODE64(token->k5->endtime); - ENCODE64(token->k5->renew_till); - ENCODE(token->k5->is_skey); - ENCODE(token->k5->flags); - - ENCODE(token->k5->n_addresses); - for (loop = 0; loop < token->k5->n_addresses; loop++) { - ENCODE(token->k5->addresses[loop].tag); - ENCODE_DATA(token->k5->addresses[loop].data_len, - token->k5->addresses[loop].data); - } - - ENCODE_DATA(token->k5->ticket_len, token->k5->ticket); - ENCODE_DATA(token->k5->ticket2_len, token->k5->ticket2); - - ENCODE(token->k5->n_authdata); - for (loop = 0; loop < token->k5->n_authdata; loop++) { - ENCODE(token->k5->authdata[loop].tag); - ENCODE_DATA(token->k5->authdata[loop].data_len, - token->k5->authdata[loop].data); - } - break; - default: break; }