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0275276035
The original NetLabel category bitmap was a straight char bitmap which worked fine for the initial release as it only supported 240 bits due to limitations in the CIPSO restricted bitmap tag (tag type 0x01). This patch converts that straight char bitmap into an extensibile/sparse bitmap in order to lay the foundation for other CIPSO tag types and protocols. This patch also has a nice side effect in that all of the security attributes passed by NetLabel into the LSM are now in a format which is in the host's native byte/bit ordering which makes the LSM specific code much simpler; look at the changes in security/selinux/ss/ebitmap.c as an example. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/*
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* Multi-level security (MLS) policy operations.
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*
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* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
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*/
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/*
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* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
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*
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* Support for enhanced MLS infrastructure.
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*
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* Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
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*/
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/*
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* Updated: Hewlett-Packard <paul.moore@hp.com>
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*
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* Added support to import/export the MLS label from NetLabel
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*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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*/
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#ifndef _SS_MLS_H_
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#define _SS_MLS_H_
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#include "context.h"
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#include "policydb.h"
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/*
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* Copies the MLS range from `src' into `dst'.
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*/
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static inline int mls_copy_context(struct context *dst,
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struct context *src)
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{
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int l, rc = 0;
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/* Copy the MLS range from the source context */
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for (l = 0; l < 2; l++) {
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dst->range.level[l].sens = src->range.level[l].sens;
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rc = ebitmap_cpy(&dst->range.level[l].cat,
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&src->range.level[l].cat);
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if (rc)
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break;
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}
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return rc;
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}
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int mls_compute_context_len(struct context *context);
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void mls_sid_to_context(struct context *context, char **scontext);
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int mls_context_isvalid(struct policydb *p, struct context *c);
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int mls_context_to_sid(char oldc,
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char **scontext,
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struct context *context,
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struct sidtab *s,
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u32 def_sid);
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int mls_from_string(char *str, struct context *context, gfp_t gfp_mask);
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int mls_convert_context(struct policydb *oldp,
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struct policydb *newp,
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struct context *context);
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int mls_compute_sid(struct context *scontext,
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struct context *tcontext,
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u16 tclass,
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u32 specified,
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struct context *newcontext);
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int mls_setup_user_range(struct context *fromcon, struct user_datum *user,
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struct context *usercon);
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#ifdef CONFIG_NETLABEL
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void mls_export_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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void mls_import_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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int mls_export_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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int mls_import_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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#else
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static inline void mls_export_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return;
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}
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static inline void mls_import_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return;
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}
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static inline int mls_export_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return -ENOMEM;
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}
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static inline int mls_import_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return -ENOMEM;
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}
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#endif
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#endif /* _SS_MLS_H */
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