rxrpc: Remove the rxk5 security class as it's now defunct
Remove the rxrpc rxk5 security class as it's now defunct and nothing uses it anymore. Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
parent
8eb621698f
commit
8a5dc32115
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@ -31,54 +31,6 @@ struct rxkad_key {
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u8 ticket[]; /* the encrypted ticket */
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};
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/*
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* Kerberos 5 principal
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* name/name/name@realm
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*/
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struct krb5_principal {
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u8 n_name_parts; /* N of parts of the name part of the principal */
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char **name_parts; /* parts of the name part of the principal */
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char *realm; /* parts of the realm part of the principal */
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};
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/*
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* Kerberos 5 tagged data
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*/
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struct krb5_tagged_data {
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/* for tag value, see /usr/include/krb5/krb5.h
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* - KRB5_AUTHDATA_* for auth data
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* -
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*/
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s32 tag;
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u32 data_len;
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u8 *data;
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};
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/*
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* RxRPC key for Kerberos V (type-5 security)
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*/
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struct rxk5_key {
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u64 authtime; /* time at which auth token generated */
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u64 starttime; /* time at which auth token starts */
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u64 endtime; /* time at which auth token expired */
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u64 renew_till; /* time to which auth token can be renewed */
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s32 is_skey; /* T if ticket is encrypted in another ticket's
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* skey */
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s32 flags; /* mask of TKT_FLG_* bits (krb5/krb5.h) */
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struct krb5_principal client; /* client principal name */
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struct krb5_principal server; /* server principal name */
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u16 ticket_len; /* length of ticket */
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u16 ticket2_len; /* length of second ticket */
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u8 n_authdata; /* number of authorisation data elements */
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u8 n_addresses; /* number of addresses */
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struct krb5_tagged_data session; /* session data; tag is enctype */
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struct krb5_tagged_data *addresses; /* addresses */
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u8 *ticket; /* krb5 ticket */
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u8 *ticket2; /* second krb5 ticket, if related to ticket (via
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* DUPLICATE-SKEY or ENC-TKT-IN-SKEY) */
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struct krb5_tagged_data *authdata; /* authorisation data */
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};
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/*
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* list of tokens attached to an rxrpc key
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*/
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@ -87,7 +39,6 @@ struct rxrpc_key_token {
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struct rxrpc_key_token *next; /* the next token in the list */
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union {
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struct rxkad_key *kad;
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struct rxk5_key *k5;
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};
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};
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@ -116,12 +67,6 @@ struct rxrpc_key_data_v1 {
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#define AFSTOKEN_RK_TIX_MAX 12000 /* max RxKAD ticket size */
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#define AFSTOKEN_GK_KEY_MAX 64 /* max GSSAPI key size */
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#define AFSTOKEN_GK_TOKEN_MAX 16384 /* max GSSAPI token size */
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#define AFSTOKEN_K5_COMPONENTS_MAX 16 /* max K5 components */
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#define AFSTOKEN_K5_NAME_MAX 128 /* max K5 name length */
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#define AFSTOKEN_K5_REALM_MAX 64 /* max K5 realm name length */
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#define AFSTOKEN_K5_TIX_MAX 16384 /* max K5 ticket size */
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#define AFSTOKEN_K5_ADDRESSES_MAX 16 /* max K5 addresses */
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#define AFSTOKEN_K5_AUTHDATA_MAX 16 /* max K5 pieces of auth data */
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/*
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* Truncate a time64_t to the range from 1970 to 2106 as in the network
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468
net/rxrpc/key.c
468
net/rxrpc/key.c
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@ -165,391 +165,6 @@ static int rxrpc_preparse_xdr_rxkad(struct key_preparsed_payload *prep,
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return 0;
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}
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static void rxrpc_free_krb5_principal(struct krb5_principal *princ)
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{
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int loop;
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if (princ->name_parts) {
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for (loop = princ->n_name_parts - 1; loop >= 0; loop--)
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kfree(princ->name_parts[loop]);
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kfree(princ->name_parts);
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}
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kfree(princ->realm);
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}
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static void rxrpc_free_krb5_tagged(struct krb5_tagged_data *td)
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{
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kfree(td->data);
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}
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/*
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* free up an RxK5 token
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*/
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static void rxrpc_rxk5_free(struct rxk5_key *rxk5)
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{
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int loop;
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rxrpc_free_krb5_principal(&rxk5->client);
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rxrpc_free_krb5_principal(&rxk5->server);
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rxrpc_free_krb5_tagged(&rxk5->session);
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if (rxk5->addresses) {
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for (loop = rxk5->n_addresses - 1; loop >= 0; loop--)
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rxrpc_free_krb5_tagged(&rxk5->addresses[loop]);
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kfree(rxk5->addresses);
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}
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if (rxk5->authdata) {
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for (loop = rxk5->n_authdata - 1; loop >= 0; loop--)
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rxrpc_free_krb5_tagged(&rxk5->authdata[loop]);
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kfree(rxk5->authdata);
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}
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kfree(rxk5->ticket);
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kfree(rxk5->ticket2);
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kfree(rxk5);
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}
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/*
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* extract a krb5 principal
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*/
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static int rxrpc_krb5_decode_principal(struct krb5_principal *princ,
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const __be32 **_xdr,
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unsigned int *_toklen)
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{
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const __be32 *xdr = *_xdr;
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unsigned int toklen = *_toklen, n_parts, loop, tmp, paddedlen;
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/* there must be at least one name, and at least #names+1 length
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* words */
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if (toklen <= 12)
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return -EINVAL;
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_enter(",{%x,%x,%x},%u",
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ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), toklen);
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n_parts = ntohl(*xdr++);
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toklen -= 4;
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if (n_parts <= 0 || n_parts > AFSTOKEN_K5_COMPONENTS_MAX)
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return -EINVAL;
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princ->n_name_parts = n_parts;
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if (toklen <= (n_parts + 1) * 4)
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return -EINVAL;
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princ->name_parts = kcalloc(n_parts, sizeof(char *), GFP_KERNEL);
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if (!princ->name_parts)
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return -ENOMEM;
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for (loop = 0; loop < n_parts; loop++) {
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if (toklen < 4)
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return -EINVAL;
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tmp = ntohl(*xdr++);
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toklen -= 4;
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if (tmp <= 0 || tmp > AFSTOKEN_STRING_MAX)
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return -EINVAL;
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paddedlen = (tmp + 3) & ~3;
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if (paddedlen > toklen)
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return -EINVAL;
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princ->name_parts[loop] = kmalloc(tmp + 1, GFP_KERNEL);
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if (!princ->name_parts[loop])
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return -ENOMEM;
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memcpy(princ->name_parts[loop], xdr, tmp);
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princ->name_parts[loop][tmp] = 0;
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toklen -= paddedlen;
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xdr += paddedlen >> 2;
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}
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if (toklen < 4)
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return -EINVAL;
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tmp = ntohl(*xdr++);
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toklen -= 4;
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if (tmp <= 0 || tmp > AFSTOKEN_K5_REALM_MAX)
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return -EINVAL;
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paddedlen = (tmp + 3) & ~3;
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if (paddedlen > toklen)
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return -EINVAL;
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princ->realm = kmalloc(tmp + 1, GFP_KERNEL);
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if (!princ->realm)
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return -ENOMEM;
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memcpy(princ->realm, xdr, tmp);
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princ->realm[tmp] = 0;
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toklen -= paddedlen;
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xdr += paddedlen >> 2;
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_debug("%s/...@%s", princ->name_parts[0], princ->realm);
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*_xdr = xdr;
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*_toklen = toklen;
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_leave(" = 0 [toklen=%u]", toklen);
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return 0;
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}
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/*
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* extract a piece of krb5 tagged data
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*/
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static int rxrpc_krb5_decode_tagged_data(struct krb5_tagged_data *td,
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size_t max_data_size,
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const __be32 **_xdr,
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unsigned int *_toklen)
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{
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const __be32 *xdr = *_xdr;
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unsigned int toklen = *_toklen, len, paddedlen;
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/* there must be at least one tag and one length word */
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if (toklen <= 8)
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return -EINVAL;
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_enter(",%zu,{%x,%x},%u",
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max_data_size, ntohl(xdr[0]), ntohl(xdr[1]), toklen);
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td->tag = ntohl(*xdr++);
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len = ntohl(*xdr++);
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toklen -= 8;
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if (len > max_data_size)
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return -EINVAL;
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paddedlen = (len + 3) & ~3;
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if (paddedlen > toklen)
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return -EINVAL;
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td->data_len = len;
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if (len > 0) {
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td->data = kmemdup(xdr, len, GFP_KERNEL);
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if (!td->data)
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return -ENOMEM;
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toklen -= paddedlen;
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xdr += paddedlen >> 2;
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}
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_debug("tag %x len %x", td->tag, td->data_len);
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*_xdr = xdr;
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*_toklen = toklen;
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_leave(" = 0 [toklen=%u]", toklen);
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return 0;
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}
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/*
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* extract an array of tagged data
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*/
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static int rxrpc_krb5_decode_tagged_array(struct krb5_tagged_data **_td,
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u8 *_n_elem,
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u8 max_n_elem,
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size_t max_elem_size,
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const __be32 **_xdr,
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unsigned int *_toklen)
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{
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struct krb5_tagged_data *td;
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const __be32 *xdr = *_xdr;
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unsigned int toklen = *_toklen, n_elem, loop;
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int ret;
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/* there must be at least one count */
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if (toklen < 4)
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return -EINVAL;
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_enter(",,%u,%zu,{%x},%u",
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max_n_elem, max_elem_size, ntohl(xdr[0]), toklen);
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n_elem = ntohl(*xdr++);
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toklen -= 4;
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if (n_elem > max_n_elem)
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return -EINVAL;
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*_n_elem = n_elem;
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if (n_elem > 0) {
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if (toklen <= (n_elem + 1) * 4)
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return -EINVAL;
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_debug("n_elem %d", n_elem);
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td = kcalloc(n_elem, sizeof(struct krb5_tagged_data),
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GFP_KERNEL);
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if (!td)
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return -ENOMEM;
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*_td = td;
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for (loop = 0; loop < n_elem; loop++) {
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ret = rxrpc_krb5_decode_tagged_data(&td[loop],
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max_elem_size,
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&xdr, &toklen);
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if (ret < 0)
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return ret;
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}
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}
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*_xdr = xdr;
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*_toklen = toklen;
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_leave(" = 0 [toklen=%u]", toklen);
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return 0;
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}
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/*
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* extract a krb5 ticket
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*/
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static int rxrpc_krb5_decode_ticket(u8 **_ticket, u16 *_tktlen,
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const __be32 **_xdr, unsigned int *_toklen)
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{
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const __be32 *xdr = *_xdr;
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unsigned int toklen = *_toklen, len, paddedlen;
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/* there must be at least one length word */
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if (toklen <= 4)
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return -EINVAL;
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_enter(",{%x},%u", ntohl(xdr[0]), toklen);
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len = ntohl(*xdr++);
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toklen -= 4;
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if (len > AFSTOKEN_K5_TIX_MAX)
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return -EINVAL;
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paddedlen = (len + 3) & ~3;
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if (paddedlen > toklen)
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return -EINVAL;
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*_tktlen = len;
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_debug("ticket len %u", len);
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if (len > 0) {
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*_ticket = kmemdup(xdr, len, GFP_KERNEL);
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if (!*_ticket)
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return -ENOMEM;
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toklen -= paddedlen;
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xdr += paddedlen >> 2;
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}
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*_xdr = xdr;
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*_toklen = toklen;
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_leave(" = 0 [toklen=%u]", toklen);
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return 0;
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}
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/*
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* parse an RxK5 type XDR format token
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* - the caller guarantees we have at least 4 words
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*/
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static int rxrpc_preparse_xdr_rxk5(struct key_preparsed_payload *prep,
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size_t datalen,
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const __be32 *xdr, unsigned int toklen)
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{
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struct rxrpc_key_token *token, **pptoken;
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struct rxk5_key *rxk5;
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const __be32 *end_xdr = xdr + (toklen >> 2);
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time64_t expiry;
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int ret;
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_enter(",{%x,%x,%x,%x},%u",
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ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]),
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toklen);
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/* reserve some payload space for this subkey - the length of the token
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* is a reasonable approximation */
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prep->quotalen = datalen + toklen;
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token = kzalloc(sizeof(*token), GFP_KERNEL);
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if (!token)
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return -ENOMEM;
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rxk5 = kzalloc(sizeof(*rxk5), GFP_KERNEL);
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if (!rxk5) {
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kfree(token);
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return -ENOMEM;
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}
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token->security_index = RXRPC_SECURITY_RXK5;
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token->k5 = rxk5;
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/* extract the principals */
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ret = rxrpc_krb5_decode_principal(&rxk5->client, &xdr, &toklen);
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if (ret < 0)
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goto error;
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ret = rxrpc_krb5_decode_principal(&rxk5->server, &xdr, &toklen);
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if (ret < 0)
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goto error;
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/* extract the session key and the encoding type (the tag field ->
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* ENCTYPE_xxx) */
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ret = rxrpc_krb5_decode_tagged_data(&rxk5->session, AFSTOKEN_DATA_MAX,
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&xdr, &toklen);
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if (ret < 0)
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goto error;
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if (toklen < 4 * 8 + 2 * 4)
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goto inval;
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rxk5->authtime = be64_to_cpup((const __be64 *) xdr);
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xdr += 2;
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rxk5->starttime = be64_to_cpup((const __be64 *) xdr);
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xdr += 2;
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rxk5->endtime = be64_to_cpup((const __be64 *) xdr);
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xdr += 2;
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rxk5->renew_till = be64_to_cpup((const __be64 *) xdr);
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xdr += 2;
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rxk5->is_skey = ntohl(*xdr++);
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rxk5->flags = ntohl(*xdr++);
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toklen -= 4 * 8 + 2 * 4;
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_debug("times: a=%llx s=%llx e=%llx rt=%llx",
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rxk5->authtime, rxk5->starttime, rxk5->endtime,
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rxk5->renew_till);
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_debug("is_skey=%x flags=%x", rxk5->is_skey, rxk5->flags);
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/* extract the permitted client addresses */
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ret = rxrpc_krb5_decode_tagged_array(&rxk5->addresses,
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&rxk5->n_addresses,
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AFSTOKEN_K5_ADDRESSES_MAX,
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AFSTOKEN_DATA_MAX,
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&xdr, &toklen);
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if (ret < 0)
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goto error;
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ASSERTCMP((end_xdr - xdr) << 2, ==, toklen);
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/* extract the tickets */
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ret = rxrpc_krb5_decode_ticket(&rxk5->ticket, &rxk5->ticket_len,
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&xdr, &toklen);
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if (ret < 0)
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goto error;
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ret = rxrpc_krb5_decode_ticket(&rxk5->ticket2, &rxk5->ticket2_len,
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&xdr, &toklen);
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if (ret < 0)
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goto error;
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ASSERTCMP((end_xdr - xdr) << 2, ==, toklen);
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/* extract the typed auth data */
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ret = rxrpc_krb5_decode_tagged_array(&rxk5->authdata,
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&rxk5->n_authdata,
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AFSTOKEN_K5_AUTHDATA_MAX,
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AFSTOKEN_BDATALN_MAX,
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&xdr, &toklen);
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if (ret < 0)
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goto error;
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ASSERTCMP((end_xdr - xdr) << 2, ==, toklen);
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if (toklen != 0)
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goto inval;
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/* attach the payload */
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for (pptoken = (struct rxrpc_key_token **)&prep->payload.data[0];
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*pptoken;
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pptoken = &(*pptoken)->next)
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continue;
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*pptoken = token;
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expiry = rxrpc_u32_to_time64(token->k5->endtime);
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if (expiry < prep->expiry)
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prep->expiry = expiry;
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_leave(" = 0");
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return 0;
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inval:
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ret = -EINVAL;
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error:
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rxrpc_rxk5_free(rxk5);
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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;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue