1 /* 2 * Multi-level security (MLS) policy operations. 3 * 4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil> 5 */ 6 /* 7 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> 8 * 9 * Support for enhanced MLS infrastructure. 10 * 11 * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc. 12 */ 13 /* 14 * Updated: Hewlett-Packard <paul.moore@hp.com> 15 * 16 * Added support to import/export the MLS label 17 * 18 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006 19 */ 20 21 #ifndef _SS_MLS_H_ 22 #define _SS_MLS_H_ 23 24 #include "context.h" 25 #include "policydb.h" 26 27 /* 28 * Copies the MLS range from `src' into `dst'. 29 */ 30 static inline int mls_copy_context(struct context *dst, 31 struct context *src) 32 { 33 int l, rc = 0; 34 35 /* Copy the MLS range from the source context */ 36 for (l = 0; l < 2; l++) { 37 dst->range.level[l].sens = src->range.level[l].sens; 38 rc = ebitmap_cpy(&dst->range.level[l].cat, 39 &src->range.level[l].cat); 40 if (rc) 41 break; 42 } 43 44 return rc; 45 } 46 47 int mls_compute_context_len(struct context *context); 48 void mls_sid_to_context(struct context *context, char **scontext); 49 int mls_context_isvalid(struct policydb *p, struct context *c); 50 51 int mls_context_to_sid(char oldc, 52 char **scontext, 53 struct context *context, 54 struct sidtab *s, 55 u32 def_sid); 56 57 int mls_from_string(char *str, struct context *context, gfp_t gfp_mask); 58 59 int mls_convert_context(struct policydb *oldp, 60 struct policydb *newp, 61 struct context *context); 62 63 int mls_compute_sid(struct context *scontext, 64 struct context *tcontext, 65 u16 tclass, 66 u32 specified, 67 struct context *newcontext); 68 69 int mls_setup_user_range(struct context *fromcon, struct user_datum *user, 70 struct context *usercon); 71 72 void mls_export_lvl(const struct context *context, u32 *low, u32 *high); 73 void mls_import_lvl(struct context *context, u32 low, u32 high); 74 75 int mls_export_cat(const struct context *context, 76 unsigned char **low, 77 size_t *low_len, 78 unsigned char **high, 79 size_t *high_len); 80 int mls_import_cat(struct context *context, 81 const unsigned char *low, 82 size_t low_len, 83 const unsigned char *high, 84 size_t high_len); 85 86 #endif /* _SS_MLS_H */ 87 88