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yaml --- r: 73551 b: refs/heads/master c: e697b8d h: refs/heads/master i: 73549: 4d5013c 73547: dc3ea7b 73543: ba4083f 73535: c1f46c5 v: v3
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Linus Torvalds
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Nov 12, 2007
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 2994c63863ac350c4c8c6a65d8110749c2abb95c | ||
| refs/heads/master: e697b8d13ede3893724898d983eff3f8c9183643 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| * fs/cifs/cifs_spnego.c -- SPNEGO upcall management for CIFS | ||
| * | ||
| * Copyright (c) 2007 Red Hat, Inc. | ||
| * Author(s): Jeff Layton (jlayton@redhat.com) | ||
| * | ||
| * This library is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published | ||
| * by the Free Software Foundation; either version 2.1 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | ||
| * the GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this library; if not, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| */ | ||
|
|
||
| #include <linux/list.h> | ||
| #include <linux/string.h> | ||
| #include <keys/user-type.h> | ||
| #include <linux/key-type.h> | ||
| #include "cifsglob.h" | ||
| #include "cifs_spnego.h" | ||
| #include "cifs_debug.h" | ||
|
|
||
| /* create a new cifs key */ | ||
| static int | ||
| cifs_spnego_key_instantiate(struct key *key, const void *data, size_t datalen) | ||
| { | ||
| char *payload; | ||
| int ret; | ||
|
|
||
| ret = -ENOMEM; | ||
| payload = kmalloc(datalen, GFP_KERNEL); | ||
| if (!payload) | ||
| goto error; | ||
|
|
||
| /* attach the data */ | ||
| memcpy(payload, data, datalen); | ||
| rcu_assign_pointer(key->payload.data, payload); | ||
| ret = 0; | ||
|
|
||
| error: | ||
| return ret; | ||
| } | ||
|
|
||
| static void | ||
| cifs_spnego_key_destroy(struct key *key) | ||
| { | ||
| kfree(key->payload.data); | ||
| } | ||
|
|
||
|
|
||
| /* | ||
| * keytype for CIFS spnego keys | ||
| */ | ||
| struct key_type cifs_spnego_key_type = { | ||
| .name = "cifs.spnego", | ||
| .instantiate = cifs_spnego_key_instantiate, | ||
| .match = user_match, | ||
| .destroy = cifs_spnego_key_destroy, | ||
| .describe = user_describe, | ||
| }; | ||
|
|
||
| /* get a key struct with a SPNEGO security blob, suitable for session setup */ | ||
| struct key * | ||
| cifs_get_spnego_key(struct cifsSesInfo *sesInfo, const char *hostname) | ||
| { | ||
| struct TCP_Server_Info *server = sesInfo->server; | ||
| char *description, *dp; | ||
| size_t desc_len; | ||
| struct key *spnego_key; | ||
|
|
||
|
|
||
| /* version + ;ip{4|6}= + address + ;host=hostname + | ||
| ;sec= + ;uid= + NULL */ | ||
| desc_len = 4 + 5 + 32 + 1 + 5 + strlen(hostname) + | ||
| strlen(";sec=krb5") + 7 + sizeof(uid_t)*2 + 1; | ||
| spnego_key = ERR_PTR(-ENOMEM); | ||
| description = kzalloc(desc_len, GFP_KERNEL); | ||
| if (description == NULL) | ||
| goto out; | ||
|
|
||
| dp = description; | ||
| /* start with version and hostname portion of UNC string */ | ||
| spnego_key = ERR_PTR(-EINVAL); | ||
| sprintf(dp, "0x%2.2x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION, | ||
| hostname); | ||
| dp = description + strlen(description); | ||
|
|
||
| /* add the server address */ | ||
| if (server->addr.sockAddr.sin_family == AF_INET) | ||
| sprintf(dp, "ip4=" NIPQUAD_FMT, | ||
| NIPQUAD(server->addr.sockAddr.sin_addr)); | ||
| else if (server->addr.sockAddr.sin_family == AF_INET6) | ||
| sprintf(dp, "ip6=" NIP6_SEQFMT, | ||
| NIP6(server->addr.sockAddr6.sin6_addr)); | ||
| else | ||
| goto out; | ||
|
|
||
| dp = description + strlen(description); | ||
|
|
||
| /* for now, only sec=krb5 is valid */ | ||
| if (server->secType == Kerberos) | ||
| sprintf(dp, ";sec=krb5"); | ||
| else | ||
| goto out; | ||
|
|
||
| dp = description + strlen(description); | ||
| sprintf(dp, ";uid=0x%x", sesInfo->linux_uid); | ||
|
|
||
| cFYI(1, ("key description = %s", description)); | ||
| spnego_key = request_key(&cifs_spnego_key_type, description, ""); | ||
|
|
||
| if (cifsFYI && !IS_ERR(spnego_key)) { | ||
| struct cifs_spnego_msg *msg = spnego_key->payload.data; | ||
| cifs_dump_mem("SPNEGO reply blob:", msg->data, | ||
| msg->secblob_len + msg->sesskey_len); | ||
| } | ||
|
|
||
| out: | ||
| kfree(description); | ||
| return spnego_key; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| /* | ||
| * fs/cifs/cifs_spnego.h -- SPNEGO upcall management for CIFS | ||
| * | ||
| * Copyright (c) 2007 Red Hat, Inc. | ||
| * Author(s): Jeff Layton (jlayton@redhat.com) | ||
| * Steve French (sfrench@us.ibm.com) | ||
| * | ||
| * This library is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published | ||
| * by the Free Software Foundation; either version 2.1 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | ||
| * the GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this library; if not, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| */ | ||
|
|
||
| #ifndef _CIFS_SPNEGO_H | ||
| #define _CIFS_SPNEGO_H | ||
|
|
||
| #define CIFS_SPNEGO_UPCALL_VERSION 1 | ||
|
|
||
| /* | ||
| * The version field should always be set to CIFS_SPNEGO_UPCALL_VERSION. | ||
| * The flags field is for future use. The request-key callout should set | ||
| * sesskey_len and secblob_len, and then concatenate the SessKey+SecBlob | ||
| * and stuff it in the data field. | ||
| */ | ||
| struct cifs_spnego_msg { | ||
| uint32_t version; | ||
| uint32_t flags; | ||
| uint32_t sesskey_len; | ||
| uint32_t secblob_len; | ||
| uint8_t data[1]; | ||
| }; | ||
|
|
||
| #ifdef __KERNEL__ | ||
| extern struct key_type cifs_spnego_key_type; | ||
| #endif /* KERNEL */ | ||
|
|
||
| #endif /* _CIFS_SPNEGO_H */ |
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