author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
child 2 | d1f6d8b6f81c |
permissions | -rw-r--r-- |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* Authentication token and access key management |
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* |
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* Copyright (C) 2004, 2007 Red Hat, Inc. All Rights Reserved. |
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* Written by David Howells (dhowells@redhat.com) |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version |
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* 2 of the License, or (at your option) any later version. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* |
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* See Documentation/keys.txt for information on keys/keyrings. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#ifndef _LINUX_KEY_H |
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#define _LINUX_KEY_H |
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|
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#include <linux/types.h> |
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#include <linux/list.h> |
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#include <linux/rbtree.h> |
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#include <linux/rcupdate.h> |
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#include <linux/sysctl.h> |
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#include <asm/atomic.h> |
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|
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#ifdef __KERNEL__ |
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|
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/* key handle serial number */ |
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typedef int32_t key_serial_t; |
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|
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/* key handle permissions mask */ |
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typedef uint32_t key_perm_t; |
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struct key; |
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#ifdef CONFIG_KEYS |
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#undef KEY_DEBUGGING |
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#define KEY_POS_VIEW 0x01000000 /* possessor can view a key's attributes */ |
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#define KEY_POS_READ 0x02000000 /* possessor can read key payload / view keyring */ |
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#define KEY_POS_WRITE 0x04000000 /* possessor can update key payload / add link to keyring */ |
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#define KEY_POS_SEARCH 0x08000000 /* possessor can find a key in search / search a keyring */ |
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#define KEY_POS_LINK 0x10000000 /* possessor can create a link to a key/keyring */ |
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#define KEY_POS_SETATTR 0x20000000 /* possessor can set key attributes */ |
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#define KEY_POS_ALL 0x3f000000 |
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|
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#define KEY_USR_VIEW 0x00010000 /* user permissions... */ |
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#define KEY_USR_READ 0x00020000 |
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#define KEY_USR_WRITE 0x00040000 |
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#define KEY_USR_SEARCH 0x00080000 |
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#define KEY_USR_LINK 0x00100000 |
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#define KEY_USR_SETATTR 0x00200000 |
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#define KEY_USR_ALL 0x003f0000 |
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|
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#define KEY_GRP_VIEW 0x00000100 /* group permissions... */ |
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#define KEY_GRP_READ 0x00000200 |
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#define KEY_GRP_WRITE 0x00000400 |
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#define KEY_GRP_SEARCH 0x00000800 |
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#define KEY_GRP_LINK 0x00001000 |
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#define KEY_GRP_SETATTR 0x00002000 |
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#define KEY_GRP_ALL 0x00003f00 |
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|
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#define KEY_OTH_VIEW 0x00000001 /* third party permissions... */ |
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#define KEY_OTH_READ 0x00000002 |
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#define KEY_OTH_WRITE 0x00000004 |
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#define KEY_OTH_SEARCH 0x00000008 |
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#define KEY_OTH_LINK 0x00000010 |
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#define KEY_OTH_SETATTR 0x00000020 |
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#define KEY_OTH_ALL 0x0000003f |
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#define KEY_PERM_UNDEF 0xffffffff |
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struct seq_file; |
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struct user_struct; |
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struct signal_struct; |
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struct key_type; |
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struct key_owner; |
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struct keyring_list; |
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struct keyring_name; |
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|
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/*****************************************************************************/ |
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/* |
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* key reference with possession attribute handling |
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* |
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* NOTE! key_ref_t is a typedef'd pointer to a type that is not actually |
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* defined. This is because we abuse the bottom bit of the reference to carry a |
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* flag to indicate whether the calling process possesses that key in one of |
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* its keyrings. |
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* |
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* the key_ref_t has been made a separate type so that the compiler can reject |
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* attempts to dereference it without proper conversion. |
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* |
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* the three functions are used to assemble and disassemble references |
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*/ |
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typedef struct __key_reference_with_attributes *key_ref_t; |
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|
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static inline key_ref_t make_key_ref(const struct key *key, |
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unsigned long possession) |
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{ |
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return (key_ref_t) ((unsigned long) key | possession); |
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} |
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|
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static inline struct key *key_ref_to_ptr(const key_ref_t key_ref) |
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{ |
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return (struct key *) ((unsigned long) key_ref & ~1UL); |
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} |
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static inline unsigned long is_key_possessed(const key_ref_t key_ref) |
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{ |
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return (unsigned long) key_ref & 1UL; |
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} |
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|
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114 |
/*****************************************************************************/ |
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115 |
/* |
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* authentication token / access credential / keyring |
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* - types of key include: |
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* - keyrings |
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* - disk encryption IDs |
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* - Kerberos TGTs and tickets |
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121 |
*/ |
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struct key { |
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atomic_t usage; /* number of references */ |
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key_serial_t serial; /* key serial number */ |
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struct rb_node serial_node; |
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struct key_type *type; /* type of key */ |
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struct rw_semaphore sem; /* change vs change sem */ |
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struct key_user *user; /* owner of this key */ |
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void *security; /* security data for this key */ |
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time_t expiry; /* time at which key expires (or 0) */ |
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uid_t uid; |
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gid_t gid; |
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key_perm_t perm; /* access permissions */ |
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unsigned short quotalen; /* length added to quota */ |
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unsigned short datalen; /* payload data length |
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* - may not match RCU dereferenced payload |
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* - payload should contain own length |
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138 |
*/ |
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139 |
|
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#ifdef KEY_DEBUGGING |
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unsigned magic; |
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#define KEY_DEBUG_MAGIC 0x18273645u |
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#define KEY_DEBUG_MAGIC_X 0xf8e9dacbu |
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#endif |
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145 |
|
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unsigned long flags; /* status flags (change with bitops) */ |
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#define KEY_FLAG_INSTANTIATED 0 /* set if key has been instantiated */ |
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#define KEY_FLAG_DEAD 1 /* set if key type has been deleted */ |
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#define KEY_FLAG_REVOKED 2 /* set if key had been revoked */ |
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#define KEY_FLAG_IN_QUOTA 3 /* set if key consumes quota */ |
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#define KEY_FLAG_USER_CONSTRUCT 4 /* set if key is being constructed in userspace */ |
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#define KEY_FLAG_NEGATIVE 5 /* set if key is negative */ |
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153 |
|
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154 |
/* the description string |
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Port of Linux 2.6.28 for use with network simulation cradle.
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155 |
* - this is used to match a key against search criteria |
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156 |
* - this should be a printable string |
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* - eg: for krb5 AFS, this might be "afs@REDHAT.COM" |
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158 |
*/ |
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159 |
char *description; |
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160 |
|
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161 |
/* type specific data |
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162 |
* - this is used by the keyring type to index the name |
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163 |
*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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164 |
union { |
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165 |
struct list_head link; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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166 |
unsigned long x[2]; |
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167 |
void *p[2]; |
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168 |
} type_data; |
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169 |
|
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170 |
/* key data |
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Port of Linux 2.6.28 for use with network simulation cradle.
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171 |
* - this is used to hold the data actually used in cryptography or |
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172 |
* whatever |
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173 |
*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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174 |
union { |
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Port of Linux 2.6.28 for use with network simulation cradle.
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175 |
unsigned long value; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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176 |
void *data; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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177 |
struct keyring_list *subscriptions; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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178 |
} payload; |
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179 |
}; |
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180 |
|
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181 |
extern struct key *key_alloc(struct key_type *type, |
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182 |
const char *desc, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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183 |
uid_t uid, gid_t gid, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
184 |
struct task_struct *ctx, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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185 |
key_perm_t perm, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
186 |
unsigned long flags); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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187 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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188 |
|
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189 |
#define KEY_ALLOC_IN_QUOTA 0x0000 /* add to quota, reject if would overrun */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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190 |
#define KEY_ALLOC_QUOTA_OVERRUN 0x0001 /* add to quota, permit even if overrun */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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191 |
#define KEY_ALLOC_NOT_IN_QUOTA 0x0002 /* not in quota */ |
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192 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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193 |
extern void key_revoke(struct key *key); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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194 |
extern void key_put(struct key *key); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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195 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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196 |
static inline struct key *key_get(struct key *key) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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197 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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198 |
if (key) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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199 |
atomic_inc(&key->usage); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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200 |
return key; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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201 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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202 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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203 |
static inline void key_ref_put(key_ref_t key_ref) |
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204 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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205 |
key_put(key_ref_to_ptr(key_ref)); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
206 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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207 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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208 |
extern struct key *request_key(struct key_type *type, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
209 |
const char *description, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
210 |
const char *callout_info); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
211 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
212 |
extern struct key *request_key_with_auxdata(struct key_type *type, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
213 |
const char *description, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
214 |
const void *callout_info, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
215 |
size_t callout_len, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
216 |
void *aux); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
217 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
218 |
extern struct key *request_key_async(struct key_type *type, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
219 |
const char *description, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
220 |
const void *callout_info, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
221 |
size_t callout_len); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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222 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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223 |
extern struct key *request_key_async_with_auxdata(struct key_type *type, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
224 |
const char *description, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
225 |
const void *callout_info, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
226 |
size_t callout_len, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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227 |
void *aux); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
228 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern int wait_for_key_construction(struct key *key, bool intr); |
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extern int key_validate(struct key *key); |
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extern key_ref_t key_create_or_update(key_ref_t keyring, |
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const char *type, |
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const char *description, |
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const void *payload, |
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size_t plen, |
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key_perm_t perm, |
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unsigned long flags); |
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extern int key_update(key_ref_t key, |
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const void *payload, |
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size_t plen); |
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extern int key_link(struct key *keyring, |
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struct key *key); |
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extern int key_unlink(struct key *keyring, |
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struct key *key); |
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extern struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid, |
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struct task_struct *ctx, |
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unsigned long flags, |
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struct key *dest); |
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extern int keyring_clear(struct key *keyring); |
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extern key_ref_t keyring_search(key_ref_t keyring, |
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struct key_type *type, |
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const char *description); |
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extern int keyring_add_key(struct key *keyring, |
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struct key *key); |
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extern struct key *key_lookup(key_serial_t id); |
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static inline key_serial_t key_serial(struct key *key) |
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{ |
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return key ? key->serial : 0; |
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} |
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#ifdef CONFIG_SYSCTL |
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extern ctl_table key_sysctls[]; |
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#endif |
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/* |
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* the userspace interface |
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*/ |
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extern void switch_uid_keyring(struct user_struct *new_user); |
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extern int copy_keys(unsigned long clone_flags, struct task_struct *tsk); |
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extern int copy_thread_group_keys(struct task_struct *tsk); |
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extern void exit_keys(struct task_struct *tsk); |
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extern void exit_thread_group_keys(struct signal_struct *tg); |
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extern int suid_keys(struct task_struct *tsk); |
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extern int exec_keys(struct task_struct *tsk); |
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extern void key_fsuid_changed(struct task_struct *tsk); |
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extern void key_fsgid_changed(struct task_struct *tsk); |
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extern void key_init(void); |
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#define __install_session_keyring(tsk, keyring) \ |
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({ \ |
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struct key *old_session = tsk->signal->session_keyring; \ |
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tsk->signal->session_keyring = keyring; \ |
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old_session; \ |
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295 |
}) |
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#else /* CONFIG_KEYS */ |
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#define key_validate(k) 0 |
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#define key_serial(k) 0 |
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#define key_get(k) ({ NULL; }) |
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#define key_revoke(k) do { } while(0) |
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#define key_put(k) do { } while(0) |
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#define key_ref_put(k) do { } while(0) |
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#define make_key_ref(k, p) ({ NULL; }) |
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#define key_ref_to_ptr(k) ({ NULL; }) |
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#define is_key_possessed(k) 0 |
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#define switch_uid_keyring(u) do { } while(0) |
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#define __install_session_keyring(t, k) ({ NULL; }) |
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#define copy_keys(f,t) 0 |
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#define copy_thread_group_keys(t) 0 |
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#define exit_keys(t) do { } while(0) |
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#define exit_thread_group_keys(tg) do { } while(0) |
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314 |
#define suid_keys(t) do { } while(0) |
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315 |
#define exec_keys(t) do { } while(0) |
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316 |
#define key_fsuid_changed(t) do { } while(0) |
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317 |
#define key_fsgid_changed(t) do { } while(0) |
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#define key_init() do { } while(0) |
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319 |
|
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320 |
#endif /* CONFIG_KEYS */ |
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321 |
#endif /* __KERNEL__ */ |
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322 |
#endif /* _LINUX_KEY_H */ |