#include <linux/skbuff.h>
#include <linux/key-type.h>
#include <linux/crypto.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include <keys/rxrpc-type.h>
static void rxrpc_destroy(struct key *);
static void rxrpc_destroy_s(struct key *);
static void rxrpc_describe(const struct key *, struct seq_file *);
+static long rxrpc_read(const struct key *, char __user *, size_t);
/*
* rxrpc defined keys take an arbitrary string as the description and an
.match = user_match,
.destroy = rxrpc_destroy,
.describe = rxrpc_describe,
+ .read = rxrpc_read,
};
EXPORT_SYMBOL(key_type_rxrpc);
};
/*
+ * parse an RxKAD type XDR format token
+ * - the caller guarantees we have at least 4 words
+ */
+static int rxrpc_instantiate_xdr_rxkad(struct key *key, const __be32 *xdr,
+ unsigned toklen)
+{
+ struct rxrpc_key_token *token, **pptoken;
+ size_t plen;
+ u32 tktlen;
+ int ret;
+
+ _enter(",{%x,%x,%x,%x},%u",
+ ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]),
+ toklen);
+
+ if (toklen <= 8 * 4)
+ return -EKEYREJECTED;
+ tktlen = ntohl(xdr[7]);
+ _debug("tktlen: %x", tktlen);
+ if (tktlen > AFSTOKEN_RK_TIX_MAX)
+ return -EKEYREJECTED;
+ if (8 * 4 + tktlen != toklen)
+ return -EKEYREJECTED;
+
+ plen = sizeof(*token) + sizeof(*token->kad) + tktlen;
+ ret = key_payload_reserve(key, key->datalen + plen);
+ if (ret < 0)
+ return ret;
+
+ plen -= sizeof(*token);
+ token = kmalloc(sizeof(*token), GFP_KERNEL);
+ if (!token)
+ return -ENOMEM;
+
+ token->kad = kmalloc(plen, GFP_KERNEL);
+ if (!token->kad) {
+ kfree(token);
+ return -ENOMEM;
+ }
+
+ token->security_index = RXRPC_SECURITY_RXKAD;
+ token->kad->ticket_len = tktlen;
+ token->kad->vice_id = ntohl(xdr[0]);
+ token->kad->kvno = ntohl(xdr[1]);
+ token->kad->start = ntohl(xdr[4]);
+ token->kad->expiry = ntohl(xdr[5]);
+ token->kad->primary_flag = ntohl(xdr[6]);
+ memcpy(&token->kad->session_key, &xdr[2], 8);
+ memcpy(&token->kad->ticket, &xdr[8], tktlen);
+
+ _debug("SCIX: %u", token->security_index);
+ _debug("TLEN: %u", token->kad->ticket_len);
+ _debug("EXPY: %x", token->kad->expiry);
+ _debug("KVNO: %u", token->kad->kvno);
+ _debug("PRIM: %u", token->kad->primary_flag);
+ _debug("SKEY: %02x%02x%02x%02x%02x%02x%02x%02x",
+ token->kad->session_key[0], token->kad->session_key[1],
+ token->kad->session_key[2], token->kad->session_key[3],
+ token->kad->session_key[4], token->kad->session_key[5],
+ token->kad->session_key[6], token->kad->session_key[7]);
+ if (token->kad->ticket_len >= 8)
+ _debug("TCKT: %02x%02x%02x%02x%02x%02x%02x%02x",
+ token->kad->ticket[0], token->kad->ticket[1],
+ token->kad->ticket[2], token->kad->ticket[3],
+ token->kad->ticket[4], token->kad->ticket[5],
+ token->kad->ticket[6], token->kad->ticket[7]);
+
+ /* count the number of tokens attached */
+ key->type_data.x[0]++;
+
+ /* attach the data */
+ for (pptoken = (struct rxrpc_key_token **)&key->payload.data;
+ *pptoken;
+ pptoken = &(*pptoken)->next)
+ continue;
+ *pptoken = token;
+ if (token->kad->expiry < key->expiry)
+ key->expiry = token->kad->expiry;
+
+ _leave(" = 0");
+ 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 *_toklen)
+{
+ const __be32 *xdr = *_xdr;
+ unsigned toklen = *_toklen, n_parts, loop, tmp;
+
+ /* 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(sizeof(char *), n_parts, 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;
+ if (tmp > 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;
+ tmp = (tmp + 3) & ~3;
+ toklen -= tmp;
+ xdr += tmp >> 2;
+ }
+
+ if (toklen < 4)
+ return -EINVAL;
+ tmp = ntohl(*xdr++);
+ toklen -= 4;
+ if (tmp <= 0 || tmp > AFSTOKEN_K5_REALM_MAX)
+ return -EINVAL;
+ if (tmp > toklen)
+ return -EINVAL;
+ princ->realm = kmalloc(tmp + 1, GFP_KERNEL);
+ if (!princ->realm)
+ return -ENOMEM;
+ memcpy(princ->realm, xdr, tmp);
+ princ->realm[tmp] = 0;
+ tmp = (tmp + 3) & ~3;
+ toklen -= tmp;
+ xdr += tmp >> 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 *_toklen)
+{
+ const __be32 *xdr = *_xdr;
+ unsigned toklen = *_toklen, len;
+
+ /* 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;
+ td->data_len = len;
+
+ if (len > 0) {
+ td->data = kmalloc(len, GFP_KERNEL);
+ if (!td->data)
+ return -ENOMEM;
+ memcpy(td->data, xdr, len);
+ len = (len + 3) & ~3;
+ toklen -= len;
+ xdr += len >> 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 *_toklen)
+{
+ struct krb5_tagged_data *td;
+ const __be32 *xdr = *_xdr;
+ unsigned 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 < 0 || 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(sizeof(struct krb5_tagged_data), n_elem,
+ 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 *_toklen)
+{
+ const __be32 *xdr = *_xdr;
+ unsigned toklen = *_toklen, len;
+
+ /* 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;
+ *_tktlen = len;
+
+ _debug("ticket len %u", len);
+
+ if (len > 0) {
+ *_ticket = kmalloc(len, GFP_KERNEL);
+ if (!*_ticket)
+ return -ENOMEM;
+ memcpy(*_ticket, xdr, len);
+ len = (len + 3) & ~3;
+ toklen -= len;
+ xdr += len >> 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_instantiate_xdr_rxk5(struct key *key, const __be32 *xdr,
+ unsigned toklen)
+{
+ struct rxrpc_key_token *token, **pptoken;
+ struct rxk5_key *rxk5;
+ const __be32 *end_xdr = xdr + (toklen >> 2);
+ 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 */
+ ret = key_payload_reserve(key, key->datalen + toklen);
+ if (ret < 0)
+ return ret;
+
+ 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 to the key */
+ for (pptoken = (struct rxrpc_key_token **)&key->payload.data;
+ *pptoken;
+ pptoken = &(*pptoken)->next)
+ continue;
+ *pptoken = token;
+ if (token->kad->expiry < key->expiry)
+ key->expiry = token->kad->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
+ */
+static int rxrpc_instantiate_xdr(struct key *key, const void *data, size_t datalen)
+{
+ const __be32 *xdr = data, *token;
+ const char *cp;
+ unsigned len, tmp, loop, ntoken, toklen, sec_ix;
+ int ret;
+
+ _enter(",{%x,%x,%x,%x},%zu",
+ ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]),
+ datalen);
+
+ if (datalen > AFSTOKEN_LENGTH_MAX)
+ goto not_xdr;
+
+ /* XDR is an array of __be32's */
+ if (datalen & 3)
+ goto not_xdr;
+
+ /* the flags should be 0 (the setpag bit must be handled by
+ * userspace) */
+ if (ntohl(*xdr++) != 0)
+ goto not_xdr;
+ datalen -= 4;
+
+ /* check the cell name */
+ len = ntohl(*xdr++);
+ if (len < 1 || len > AFSTOKEN_CELL_MAX)
+ goto not_xdr;
+ datalen -= 4;
+ tmp = (len + 3) & ~3;
+ if (tmp > datalen)
+ goto not_xdr;
+
+ cp = (const char *) xdr;
+ for (loop = 0; loop < len; loop++)
+ if (!isprint(cp[loop]))
+ goto not_xdr;
+ if (len < tmp)
+ for (; loop < tmp; loop++)
+ if (cp[loop])
+ goto not_xdr;
+ _debug("cellname: [%u/%u] '%*.*s'",
+ len, tmp, len, len, (const char *) xdr);
+ datalen -= tmp;
+ xdr += tmp >> 2;
+
+ /* get the token count */
+ if (datalen < 12)
+ goto not_xdr;
+ ntoken = ntohl(*xdr++);
+ datalen -= 4;
+ _debug("ntoken: %x", ntoken);
+ if (ntoken < 1 || ntoken > AFSTOKEN_MAX)
+ goto not_xdr;
+
+ /* check each token wrapper */
+ token = xdr;
+ loop = ntoken;
+ do {
+ if (datalen < 8)
+ goto not_xdr;
+ toklen = ntohl(*xdr++);
+ sec_ix = ntohl(*xdr);
+ datalen -= 4;
+ _debug("token: [%x/%zx] %x", toklen, datalen, sec_ix);
+ if (toklen < 20 || toklen > datalen)
+ goto not_xdr;
+ datalen -= (toklen + 3) & ~3;
+ xdr += (toklen + 3) >> 2;
+
+ } while (--loop > 0);
+
+ _debug("remainder: %zu", datalen);
+ if (datalen != 0)
+ goto not_xdr;
+
+ /* okay: we're going to assume it's valid XDR format
+ * - we ignore the cellname, relying on the key to be correctly named
+ */
+ do {
+ xdr = token;
+ toklen = ntohl(*xdr++);
+ token = xdr + ((toklen + 3) >> 2);
+ sec_ix = ntohl(*xdr++);
+ toklen -= 4;
+
+ _debug("TOKEN type=%u [%p-%p]", sec_ix, xdr, token);
+
+ switch (sec_ix) {
+ case RXRPC_SECURITY_RXKAD:
+ ret = rxrpc_instantiate_xdr_rxkad(key, xdr, toklen);
+ if (ret != 0)
+ goto error;
+ break;
+
+ case RXRPC_SECURITY_RXK5:
+ ret = rxrpc_instantiate_xdr_rxk5(key, xdr, toklen);
+ if (ret != 0)
+ goto error;
+ break;
+
+ default:
+ ret = -EPROTONOSUPPORT;
+ goto error;
+ }
+
+ } while (--ntoken > 0);
+
+ _leave(" = 0");
+ return 0;
+
+not_xdr:
+ _leave(" = -EPROTO");
+ return -EPROTO;
+error:
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
* instantiate an rxrpc defined key
* data should be of the form:
* OFFSET LEN CONTENT
*/
static int rxrpc_instantiate(struct key *key, const void *data, size_t datalen)
{
- const struct rxkad_key *tsec;
- struct rxrpc_key_payload *upayload;
+ const struct rxrpc_key_data_v1 *v1;
+ struct rxrpc_key_token *token, **pp;
size_t plen;
u32 kver;
int ret;
if (!data && datalen == 0)
return 0;
+ /* determine if the XDR payload format is being used */
+ if (datalen > 7 * 4) {
+ ret = rxrpc_instantiate_xdr(key, data, datalen);
+ if (ret != -EPROTO)
+ return ret;
+ }
+
/* get the key interface version number */
ret = -EINVAL;
if (datalen <= 4 || !data)
/* deal with a version 1 key */
ret = -EINVAL;
- if (datalen < sizeof(*tsec))
+ if (datalen < sizeof(*v1))
goto error;
- tsec = data;
- if (datalen != sizeof(*tsec) + tsec->ticket_len)
+ v1 = data;
+ if (datalen != sizeof(*v1) + v1->ticket_length)
goto error;
- _debug("SCIX: %u", tsec->security_index);
- _debug("TLEN: %u", tsec->ticket_len);
- _debug("EXPY: %x", tsec->expiry);
- _debug("KVNO: %u", tsec->kvno);
+ _debug("SCIX: %u", v1->security_index);
+ _debug("TLEN: %u", v1->ticket_length);
+ _debug("EXPY: %x", v1->expiry);
+ _debug("KVNO: %u", v1->kvno);
_debug("SKEY: %02x%02x%02x%02x%02x%02x%02x%02x",
- tsec->session_key[0], tsec->session_key[1],
- tsec->session_key[2], tsec->session_key[3],
- tsec->session_key[4], tsec->session_key[5],
- tsec->session_key[6], tsec->session_key[7]);
- if (tsec->ticket_len >= 8)
+ v1->session_key[0], v1->session_key[1],
+ v1->session_key[2], v1->session_key[3],
+ v1->session_key[4], v1->session_key[5],
+ v1->session_key[6], v1->session_key[7]);
+ if (v1->ticket_length >= 8)
_debug("TCKT: %02x%02x%02x%02x%02x%02x%02x%02x",
- tsec->ticket[0], tsec->ticket[1],
- tsec->ticket[2], tsec->ticket[3],
- tsec->ticket[4], tsec->ticket[5],
- tsec->ticket[6], tsec->ticket[7]);
+ v1->ticket[0], v1->ticket[1],
+ v1->ticket[2], v1->ticket[3],
+ v1->ticket[4], v1->ticket[5],
+ v1->ticket[6], v1->ticket[7]);
ret = -EPROTONOSUPPORT;
- if (tsec->security_index != 2)
+ if (v1->security_index != RXRPC_SECURITY_RXKAD)
goto error;
- key->type_data.x[0] = tsec->security_index;
-
- plen = sizeof(*upayload) + tsec->ticket_len;
- ret = key_payload_reserve(key, plen);
+ plen = sizeof(*token->kad) + v1->ticket_length;
+ ret = key_payload_reserve(key, plen + sizeof(*token));
if (ret < 0)
goto error;
ret = -ENOMEM;
- upayload = kmalloc(plen, GFP_KERNEL);
- if (!upayload)
+ token = kmalloc(sizeof(*token), GFP_KERNEL);
+ if (!token)
goto error;
+ token->kad = kmalloc(plen, GFP_KERNEL);
+ if (!token->kad)
+ goto error_free;
+
+ token->security_index = RXRPC_SECURITY_RXKAD;
+ token->kad->ticket_len = v1->ticket_length;
+ token->kad->expiry = v1->expiry;
+ token->kad->kvno = v1->kvno;
+ memcpy(&token->kad->session_key, &v1->session_key, 8);
+ memcpy(&token->kad->ticket, v1->ticket, v1->ticket_length);
/* attach the data */
- memcpy(&upayload->k, tsec, sizeof(*tsec));
- memcpy(&upayload->k.ticket, (void *)tsec + sizeof(*tsec),
- tsec->ticket_len);
- key->payload.data = upayload;
- key->expiry = tsec->expiry;
+ key->type_data.x[0]++;
+
+ pp = (struct rxrpc_key_token **)&key->payload.data;
+ while (*pp)
+ pp = &(*pp)->next;
+ *pp = token;
+ if (token->kad->expiry < key->expiry)
+ key->expiry = token->kad->expiry;
+ token = NULL;
ret = 0;
+error_free:
+ kfree(token);
error:
return ret;
}
*/
static void rxrpc_destroy(struct key *key)
{
- kfree(key->payload.data);
+ struct rxrpc_key_token *token;
+
+ while ((token = key->payload.data)) {
+ key->payload.data = token->next;
+ switch (token->security_index) {
+ case RXRPC_SECURITY_RXKAD:
+ kfree(token->kad);
+ break;
+ case RXRPC_SECURITY_RXK5:
+ if (token->k5)
+ rxrpc_rxk5_free(token->k5);
+ break;
+ default:
+ printk(KERN_ERR "Unknown token type %x on rxrpc key\n",
+ token->security_index);
+ BUG();
+ }
+
+ kfree(token);
+ }
}
/*
time_t expiry,
u32 kvno)
{
+ const struct cred *cred = current_cred();
struct key *key;
int ret;
struct {
u32 kver;
- struct rxkad_key tsec;
+ struct rxrpc_key_data_v1 v1;
} data;
_enter("");
- key = key_alloc(&key_type_rxrpc, "x", 0, 0, current, 0,
+ key = key_alloc(&key_type_rxrpc, "x", 0, 0, cred, 0,
KEY_ALLOC_NOT_IN_QUOTA);
if (IS_ERR(key)) {
_leave(" = -ENOMEM [alloc %ld]", PTR_ERR(key));
_debug("key %d", key_serial(key));
data.kver = 1;
- data.tsec.security_index = 2;
- data.tsec.ticket_len = 0;
- data.tsec.expiry = expiry;
- data.tsec.kvno = 0;
+ data.v1.security_index = RXRPC_SECURITY_RXKAD;
+ data.v1.ticket_length = 0;
+ data.v1.expiry = expiry;
+ data.v1.kvno = 0;
- memcpy(&data.tsec.session_key, session_key,
- sizeof(data.tsec.session_key));
+ memcpy(&data.v1.session_key, session_key, sizeof(data.v1.session_key));
ret = key_instantiate_and_link(key, &data, sizeof(data), NULL, NULL);
if (ret < 0)
*/
struct key *rxrpc_get_null_key(const char *keyname)
{
+ const struct cred *cred = current_cred();
struct key *key;
int ret;
- key = key_alloc(&key_type_rxrpc, keyname, 0, 0, current,
+ key = key_alloc(&key_type_rxrpc, keyname, 0, 0, cred,
KEY_POS_SEARCH, KEY_ALLOC_NOT_IN_QUOTA);
if (IS_ERR(key))
return key;
return key;
}
EXPORT_SYMBOL(rxrpc_get_null_key);
+
+/*
+ * read the contents of an rxrpc key
+ * - this returns the result in XDR form
+ */
+static long rxrpc_read(const struct key *key,
+ char __user *buffer, size_t buflen)
+{
+ const struct rxrpc_key_token *token;
+ const struct krb5_principal *princ;
+ size_t size;
+ __be32 __user *xdr, *oldxdr;
+ u32 cnlen, toksize, ntoks, tok, zero;
+ u16 toksizes[AFSTOKEN_MAX];
+ int loop;
+
+ _enter("");
+
+ /* we don't know what form we should return non-AFS keys in */
+ if (memcmp(key->description, "afs@", 4) != 0)
+ return -EOPNOTSUPP;
+ cnlen = strlen(key->description + 4);
+
+#define RND(X) (((X) + 3) & ~3)
+
+ /* AFS keys we return in XDR form, so we need to work out the size of
+ * the XDR */
+ size = 2 * 4; /* flags, cellname len */
+ size += RND(cnlen); /* cellname */
+ size += 1 * 4; /* token count */
+
+ ntoks = 0;
+ for (token = key->payload.data; token; token = token->next) {
+ toksize = 4; /* sec index */
+
+ switch (token->security_index) {
+ case RXRPC_SECURITY_RXKAD:
+ toksize += 8 * 4; /* viceid, kvno, key*2, begin,
+ * end, primary, tktlen */
+ 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 */
+ BUG();
+ continue;
+ }
+
+ _debug("token[%u]: toksize=%u", ntoks, toksize);
+ ASSERTCMP(toksize, <=, AFSTOKEN_LENGTH_MAX);
+
+ toksizes[ntoks++] = toksize;
+ size += toksize + 4; /* each token has a length word */
+ }
+
+#undef RND
+
+ if (!buffer || buflen < size)
+ return size;
+
+ xdr = (__be32 __user *) buffer;
+ zero = 0;
+#define ENCODE(x) \
+ do { \
+ __be32 y = htonl(x); \
+ if (put_user(y, xdr++) < 0) \
+ goto fault; \
+ } while(0)
+#define ENCODE_DATA(l, s) \
+ do { \
+ u32 _l = (l); \
+ ENCODE(l); \
+ if (copy_to_user(xdr, (s), _l) != 0) \
+ goto fault; \
+ if (_l & 3 && \
+ copy_to_user((u8 *)xdr + _l, &zero, 4 - (_l & 3)) != 0) \
+ goto fault; \
+ xdr += (_l + 3) >> 2; \
+ } while(0)
+#define ENCODE64(x) \
+ do { \
+ __be64 y = cpu_to_be64(x); \
+ if (copy_to_user(xdr, &y, 8) != 0) \
+ goto fault; \
+ xdr += 8 >> 2; \
+ } while(0)
+#define ENCODE_STR(s) \
+ do { \
+ const char *_s = (s); \
+ ENCODE_DATA(strlen(_s), _s); \
+ } while(0)
+
+ ENCODE(0); /* flags */
+ ENCODE_DATA(cnlen, key->description + 4); /* cellname */
+ ENCODE(ntoks);
+
+ tok = 0;
+ for (token = key->payload.data; token; token = token->next) {
+ toksize = toksizes[tok++];
+ ENCODE(toksize);
+ oldxdr = xdr;
+ ENCODE(token->security_index);
+
+ switch (token->security_index) {
+ case RXRPC_SECURITY_RXKAD:
+ ENCODE(token->kad->vice_id);
+ ENCODE(token->kad->kvno);
+ ENCODE_DATA(8, token->kad->session_key);
+ ENCODE(token->kad->start);
+ ENCODE(token->kad->expiry);
+ ENCODE(token->kad->primary_flag);
+ 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:
+ BUG();
+ break;
+ }
+
+ ASSERTCMP((unsigned long)xdr - (unsigned long)oldxdr, ==,
+ toksize);
+ }
+
+#undef ENCODE_STR
+#undef ENCODE_DATA
+#undef ENCODE64
+#undef ENCODE
+
+ ASSERTCMP(tok, ==, ntoks);
+ ASSERTCMP((char __user *) xdr - buffer, ==, size);
+ _leave(" = %zu", size);
+ return size;
+
+fault:
+ _leave(" = -EFAULT");
+ return -EFAULT;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff