Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Implementation of the multi-level security (MLS) policy. |
| 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 | * |
Darrel Goeddel | 376bd9c | 2006-02-24 15:44:05 -0600 | [diff] [blame] | 11 | * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 13 | /* |
Paul Moore | 82c21bf | 2011-08-01 11:10:33 +0000 | [diff] [blame] | 14 | * Updated: Hewlett-Packard <paul@paul-moore.com> |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 15 | * |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 16 | * Added support to import/export the MLS label from NetLabel |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 17 | * |
| 18 | * (c) Copyright Hewlett-Packard Development Company, L.P., 2006 |
| 19 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/string.h> |
| 24 | #include <linux/errno.h> |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 25 | #include <net/netlabel.h> |
James Morris | f5c1d5b | 2005-07-28 01:07:37 -0700 | [diff] [blame] | 26 | #include "sidtab.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "mls.h" |
| 28 | #include "policydb.h" |
| 29 | #include "services.h" |
| 30 | |
| 31 | /* |
| 32 | * Return the length in bytes for the MLS fields of the |
| 33 | * security context string representation of `context'. |
| 34 | */ |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 35 | int mls_compute_context_len(struct context *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | { |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 37 | int i, l, len, head, prev; |
| 38 | char *nm; |
| 39 | struct ebitmap *e; |
Stephen Smalley | 782ebb9 | 2005-09-03 15:55:16 -0700 | [diff] [blame] | 40 | struct ebitmap_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 42 | if (!policydb.mls_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | return 0; |
| 44 | |
| 45 | len = 1; /* for the beginning ":" */ |
| 46 | for (l = 0; l < 2; l++) { |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 47 | int index_sens = context->range.level[l].sens; |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 48 | len += strlen(sym_name(&policydb, SYM_LEVELS, index_sens - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 50 | /* categories */ |
| 51 | head = -2; |
| 52 | prev = -2; |
| 53 | e = &context->range.level[l].cat; |
| 54 | ebitmap_for_each_positive_bit(e, node, i) { |
| 55 | if (i - prev > 1) { |
| 56 | /* one or more negative bits are skipped */ |
| 57 | if (head != prev) { |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 58 | nm = sym_name(&policydb, SYM_CATS, prev); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 59 | len += strlen(nm) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | } |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 61 | nm = sym_name(&policydb, SYM_CATS, i); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 62 | len += strlen(nm) + 1; |
| 63 | head = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 65 | prev = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | } |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 67 | if (prev != head) { |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 68 | nm = sym_name(&policydb, SYM_CATS, prev); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 69 | len += strlen(nm) + 1; |
| 70 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | if (l == 0) { |
| 72 | if (mls_level_eq(&context->range.level[0], |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 73 | &context->range.level[1])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | break; |
| 75 | else |
| 76 | len++; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | return len; |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * Write the security context string representation of |
| 85 | * the MLS fields of `context' into the string `*scontext'. |
| 86 | * Update `*scontext' to point to the end of the MLS fields. |
| 87 | */ |
| 88 | void mls_sid_to_context(struct context *context, |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 89 | char **scontext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 91 | char *scontextp, *nm; |
| 92 | int i, l, head, prev; |
| 93 | struct ebitmap *e; |
Stephen Smalley | 782ebb9 | 2005-09-03 15:55:16 -0700 | [diff] [blame] | 94 | struct ebitmap_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 96 | if (!policydb.mls_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | return; |
| 98 | |
| 99 | scontextp = *scontext; |
| 100 | |
| 101 | *scontextp = ':'; |
| 102 | scontextp++; |
| 103 | |
| 104 | for (l = 0; l < 2; l++) { |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 105 | strcpy(scontextp, sym_name(&policydb, SYM_LEVELS, |
| 106 | context->range.level[l].sens - 1)); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 107 | scontextp += strlen(scontextp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
| 109 | /* categories */ |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 110 | head = -2; |
| 111 | prev = -2; |
| 112 | e = &context->range.level[l].cat; |
| 113 | ebitmap_for_each_positive_bit(e, node, i) { |
| 114 | if (i - prev > 1) { |
| 115 | /* one or more negative bits are skipped */ |
| 116 | if (prev != head) { |
| 117 | if (prev - head > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | *scontextp++ = '.'; |
| 119 | else |
| 120 | *scontextp++ = ','; |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 121 | nm = sym_name(&policydb, SYM_CATS, prev); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 122 | strcpy(scontextp, nm); |
| 123 | scontextp += strlen(nm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 125 | if (prev < 0) |
| 126 | *scontextp++ = ':'; |
| 127 | else |
| 128 | *scontextp++ = ','; |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 129 | nm = sym_name(&policydb, SYM_CATS, i); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 130 | strcpy(scontextp, nm); |
| 131 | scontextp += strlen(nm); |
| 132 | head = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 134 | prev = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 137 | if (prev != head) { |
| 138 | if (prev - head > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | *scontextp++ = '.'; |
| 140 | else |
| 141 | *scontextp++ = ','; |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 142 | nm = sym_name(&policydb, SYM_CATS, prev); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 143 | strcpy(scontextp, nm); |
| 144 | scontextp += strlen(nm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | if (l == 0) { |
| 148 | if (mls_level_eq(&context->range.level[0], |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 149 | &context->range.level[1])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | break; |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 151 | else |
| 152 | *scontextp++ = '-'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | } |
| 155 | |
| 156 | *scontext = scontextp; |
| 157 | return; |
| 158 | } |
| 159 | |
Stephen Smalley | 45e5421 | 2007-11-07 10:08:00 -0500 | [diff] [blame] | 160 | int mls_level_isvalid(struct policydb *p, struct mls_level *l) |
| 161 | { |
| 162 | struct level_datum *levdatum; |
Stephen Smalley | 45e5421 | 2007-11-07 10:08:00 -0500 | [diff] [blame] | 163 | |
| 164 | if (!l->sens || l->sens > p->p_levels.nprim) |
| 165 | return 0; |
| 166 | levdatum = hashtab_search(p->p_levels.table, |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 167 | sym_name(p, SYM_LEVELS, l->sens - 1)); |
Stephen Smalley | 45e5421 | 2007-11-07 10:08:00 -0500 | [diff] [blame] | 168 | if (!levdatum) |
| 169 | return 0; |
| 170 | |
Waiman Long | fee7114 | 2013-07-23 17:38:41 -0400 | [diff] [blame] | 171 | /* |
| 172 | * Return 1 iff all the bits set in l->cat are also be set in |
| 173 | * levdatum->level->cat and no bit in l->cat is larger than |
| 174 | * p->p_cats.nprim. |
| 175 | */ |
| 176 | return ebitmap_contains(&levdatum->level->cat, &l->cat, |
| 177 | p->p_cats.nprim); |
Stephen Smalley | 45e5421 | 2007-11-07 10:08:00 -0500 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | int mls_range_isvalid(struct policydb *p, struct mls_range *r) |
| 181 | { |
| 182 | return (mls_level_isvalid(p, &r->level[0]) && |
| 183 | mls_level_isvalid(p, &r->level[1]) && |
| 184 | mls_level_dom(&r->level[1], &r->level[0])); |
| 185 | } |
| 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | /* |
| 188 | * Return 1 if the MLS fields in the security context |
| 189 | * structure `c' are valid. Return 0 otherwise. |
| 190 | */ |
| 191 | int mls_context_isvalid(struct policydb *p, struct context *c) |
| 192 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | struct user_datum *usrdatum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 195 | if (!p->mls_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | return 1; |
| 197 | |
Stephen Smalley | 45e5421 | 2007-11-07 10:08:00 -0500 | [diff] [blame] | 198 | if (!mls_range_isvalid(p, &c->range)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | return 0; |
| 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | if (c->role == OBJECT_R_VAL) |
| 202 | return 1; |
| 203 | |
| 204 | /* |
| 205 | * User must be authorized for the MLS range. |
| 206 | */ |
| 207 | if (!c->user || c->user > p->p_users.nprim) |
| 208 | return 0; |
| 209 | usrdatum = p->user_val_to_struct[c->user - 1]; |
| 210 | if (!mls_range_contains(usrdatum->range, c->range)) |
| 211 | return 0; /* user may not be associated with range */ |
| 212 | |
| 213 | return 1; |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * Set the MLS fields in the security context structure |
| 218 | * `context' based on the string representation in |
| 219 | * the string `*scontext'. Update `*scontext' to |
| 220 | * point to the end of the string representation of |
| 221 | * the MLS fields. |
| 222 | * |
| 223 | * This function modifies the string in place, inserting |
| 224 | * NULL characters to terminate the MLS fields. |
James Morris | f5c1d5b | 2005-07-28 01:07:37 -0700 | [diff] [blame] | 225 | * |
| 226 | * If a def_sid is provided and no MLS field is present, |
| 227 | * copy the MLS field of the associated default context. |
| 228 | * Used for upgraded to MLS systems where objects may lack |
| 229 | * MLS fields. |
| 230 | * |
| 231 | * Policy read-lock must be held for sidtab lookup. |
| 232 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | */ |
Stephen Smalley | 12b29f3 | 2008-05-07 13:03:20 -0400 | [diff] [blame] | 234 | int mls_context_to_sid(struct policydb *pol, |
| 235 | char oldc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | char **scontext, |
James Morris | f5c1d5b | 2005-07-28 01:07:37 -0700 | [diff] [blame] | 237 | struct context *context, |
| 238 | struct sidtab *s, |
| 239 | u32 def_sid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
| 241 | |
| 242 | char delim; |
| 243 | char *scontextp, *p, *rngptr; |
| 244 | struct level_datum *levdatum; |
| 245 | struct cat_datum *catdatum, *rngdatum; |
| 246 | int l, rc = -EINVAL; |
| 247 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 248 | if (!pol->mls_enabled) { |
Stephen Smalley | e517a0c | 2005-11-08 21:34:32 -0800 | [diff] [blame] | 249 | if (def_sid != SECSID_NULL && oldc) |
wzt.wzt@gmail.com | c1a7368 | 2010-04-09 19:30:29 +0800 | [diff] [blame] | 250 | *scontext += strlen(*scontext) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | return 0; |
Stephen Smalley | e517a0c | 2005-11-08 21:34:32 -0800 | [diff] [blame] | 252 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
James Morris | f5c1d5b | 2005-07-28 01:07:37 -0700 | [diff] [blame] | 254 | /* |
| 255 | * No MLS component to the security context, try and map to |
| 256 | * default if provided. |
| 257 | */ |
| 258 | if (!oldc) { |
| 259 | struct context *defcon; |
| 260 | |
| 261 | if (def_sid == SECSID_NULL) |
| 262 | goto out; |
| 263 | |
| 264 | defcon = sidtab_search(s, def_sid); |
| 265 | if (!defcon) |
| 266 | goto out; |
| 267 | |
Venkat Yekkirala | 0efc61e | 2006-12-12 13:02:41 -0600 | [diff] [blame] | 268 | rc = mls_context_cpy(context, defcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | goto out; |
James Morris | f5c1d5b | 2005-07-28 01:07:37 -0700 | [diff] [blame] | 270 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | /* Extract low sensitivity. */ |
| 273 | scontextp = p = *scontext; |
| 274 | while (*p && *p != ':' && *p != '-') |
| 275 | p++; |
| 276 | |
| 277 | delim = *p; |
Vesa-Matti J Kari | df4ea86 | 2008-07-20 23:57:01 +0300 | [diff] [blame] | 278 | if (delim != '\0') |
| 279 | *p++ = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | for (l = 0; l < 2; l++) { |
Stephen Smalley | 12b29f3 | 2008-05-07 13:03:20 -0400 | [diff] [blame] | 282 | levdatum = hashtab_search(pol->p_levels.table, scontextp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | if (!levdatum) { |
| 284 | rc = -EINVAL; |
| 285 | goto out; |
| 286 | } |
| 287 | |
| 288 | context->range.level[l].sens = levdatum->level->sens; |
| 289 | |
| 290 | if (delim == ':') { |
| 291 | /* Extract category set. */ |
| 292 | while (1) { |
| 293 | scontextp = p; |
| 294 | while (*p && *p != ',' && *p != '-') |
| 295 | p++; |
| 296 | delim = *p; |
Vesa-Matti J Kari | df4ea86 | 2008-07-20 23:57:01 +0300 | [diff] [blame] | 297 | if (delim != '\0') |
| 298 | *p++ = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | /* Separate into range if exists */ |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 301 | rngptr = strchr(scontextp, '.'); |
| 302 | if (rngptr != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | /* Remove '.' */ |
Vesa-Matti J Kari | df4ea86 | 2008-07-20 23:57:01 +0300 | [diff] [blame] | 304 | *rngptr++ = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | } |
| 306 | |
Stephen Smalley | 12b29f3 | 2008-05-07 13:03:20 -0400 | [diff] [blame] | 307 | catdatum = hashtab_search(pol->p_cats.table, |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 308 | scontextp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (!catdatum) { |
| 310 | rc = -EINVAL; |
| 311 | goto out; |
| 312 | } |
| 313 | |
| 314 | rc = ebitmap_set_bit(&context->range.level[l].cat, |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 315 | catdatum->value - 1, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (rc) |
| 317 | goto out; |
| 318 | |
| 319 | /* If range, set all categories in range */ |
| 320 | if (rngptr) { |
| 321 | int i; |
| 322 | |
Stephen Smalley | 12b29f3 | 2008-05-07 13:03:20 -0400 | [diff] [blame] | 323 | rngdatum = hashtab_search(pol->p_cats.table, rngptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | if (!rngdatum) { |
| 325 | rc = -EINVAL; |
| 326 | goto out; |
| 327 | } |
| 328 | |
| 329 | if (catdatum->value >= rngdatum->value) { |
| 330 | rc = -EINVAL; |
| 331 | goto out; |
| 332 | } |
| 333 | |
| 334 | for (i = catdatum->value; i < rngdatum->value; i++) { |
| 335 | rc = ebitmap_set_bit(&context->range.level[l].cat, i, 1); |
| 336 | if (rc) |
| 337 | goto out; |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | if (delim != ',') |
| 342 | break; |
| 343 | } |
| 344 | } |
| 345 | if (delim == '-') { |
| 346 | /* Extract high sensitivity. */ |
| 347 | scontextp = p; |
| 348 | while (*p && *p != ':') |
| 349 | p++; |
| 350 | |
| 351 | delim = *p; |
Vesa-Matti J Kari | df4ea86 | 2008-07-20 23:57:01 +0300 | [diff] [blame] | 352 | if (delim != '\0') |
| 353 | *p++ = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } else |
| 355 | break; |
| 356 | } |
| 357 | |
| 358 | if (l == 0) { |
| 359 | context->range.level[1].sens = context->range.level[0].sens; |
| 360 | rc = ebitmap_cpy(&context->range.level[1].cat, |
| 361 | &context->range.level[0].cat); |
| 362 | if (rc) |
| 363 | goto out; |
| 364 | } |
| 365 | *scontext = ++p; |
| 366 | rc = 0; |
| 367 | out: |
| 368 | return rc; |
| 369 | } |
| 370 | |
| 371 | /* |
Darrel Goeddel | 376bd9c | 2006-02-24 15:44:05 -0600 | [diff] [blame] | 372 | * Set the MLS fields in the security context structure |
| 373 | * `context' based on the string representation in |
| 374 | * the string `str'. This function will allocate temporary memory with the |
| 375 | * given constraints of gfp_mask. |
| 376 | */ |
| 377 | int mls_from_string(char *str, struct context *context, gfp_t gfp_mask) |
| 378 | { |
| 379 | char *tmpstr, *freestr; |
| 380 | int rc; |
| 381 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 382 | if (!policydb.mls_enabled) |
Darrel Goeddel | 376bd9c | 2006-02-24 15:44:05 -0600 | [diff] [blame] | 383 | return -EINVAL; |
| 384 | |
| 385 | /* we need freestr because mls_context_to_sid will change |
| 386 | the value of tmpstr */ |
| 387 | tmpstr = freestr = kstrdup(str, gfp_mask); |
| 388 | if (!tmpstr) { |
| 389 | rc = -ENOMEM; |
| 390 | } else { |
Stephen Smalley | 12b29f3 | 2008-05-07 13:03:20 -0400 | [diff] [blame] | 391 | rc = mls_context_to_sid(&policydb, ':', &tmpstr, context, |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 392 | NULL, SECSID_NULL); |
Darrel Goeddel | 376bd9c | 2006-02-24 15:44:05 -0600 | [diff] [blame] | 393 | kfree(freestr); |
| 394 | } |
| 395 | |
| 396 | return rc; |
| 397 | } |
| 398 | |
| 399 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | * Copies the MLS range `range' into `context'. |
| 401 | */ |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 402 | int mls_range_set(struct context *context, |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 403 | struct mls_range *range) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | { |
| 405 | int l, rc = 0; |
| 406 | |
| 407 | /* Copy the MLS range into the context */ |
| 408 | for (l = 0; l < 2; l++) { |
| 409 | context->range.level[l].sens = range->level[l].sens; |
| 410 | rc = ebitmap_cpy(&context->range.level[l].cat, |
| 411 | &range->level[l].cat); |
| 412 | if (rc) |
| 413 | break; |
| 414 | } |
| 415 | |
| 416 | return rc; |
| 417 | } |
| 418 | |
| 419 | int mls_setup_user_range(struct context *fromcon, struct user_datum *user, |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 420 | struct context *usercon) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 422 | if (policydb.mls_enabled) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | struct mls_level *fromcon_sen = &(fromcon->range.level[0]); |
| 424 | struct mls_level *fromcon_clr = &(fromcon->range.level[1]); |
| 425 | struct mls_level *user_low = &(user->range.level[0]); |
| 426 | struct mls_level *user_clr = &(user->range.level[1]); |
| 427 | struct mls_level *user_def = &(user->dfltlevel); |
| 428 | struct mls_level *usercon_sen = &(usercon->range.level[0]); |
| 429 | struct mls_level *usercon_clr = &(usercon->range.level[1]); |
| 430 | |
| 431 | /* Honor the user's default level if we can */ |
Eric Paris | f526971 | 2008-05-14 11:27:45 -0400 | [diff] [blame] | 432 | if (mls_level_between(user_def, fromcon_sen, fromcon_clr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | *usercon_sen = *user_def; |
Eric Paris | f526971 | 2008-05-14 11:27:45 -0400 | [diff] [blame] | 434 | else if (mls_level_between(fromcon_sen, user_def, user_clr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | *usercon_sen = *fromcon_sen; |
Eric Paris | f526971 | 2008-05-14 11:27:45 -0400 | [diff] [blame] | 436 | else if (mls_level_between(fromcon_clr, user_low, user_def)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | *usercon_sen = *user_low; |
Eric Paris | f526971 | 2008-05-14 11:27:45 -0400 | [diff] [blame] | 438 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | return -EINVAL; |
| 440 | |
| 441 | /* Lower the clearance of available contexts |
| 442 | if the clearance of "fromcon" is lower than |
| 443 | that of the user's default clearance (but |
| 444 | only if the "fromcon" clearance dominates |
| 445 | the user's computed sensitivity level) */ |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 446 | if (mls_level_dom(user_clr, fromcon_clr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | *usercon_clr = *fromcon_clr; |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 448 | else if (mls_level_dom(fromcon_clr, user_clr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | *usercon_clr = *user_clr; |
Eric Paris | 1a5e6f8 | 2008-04-18 17:38:32 -0400 | [diff] [blame] | 450 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | return -EINVAL; |
| 452 | } |
| 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | /* |
| 458 | * Convert the MLS fields in the security context |
| 459 | * structure `c' from the values specified in the |
| 460 | * policy `oldp' to the values specified in the policy `newp'. |
| 461 | */ |
| 462 | int mls_convert_context(struct policydb *oldp, |
| 463 | struct policydb *newp, |
| 464 | struct context *c) |
| 465 | { |
| 466 | struct level_datum *levdatum; |
| 467 | struct cat_datum *catdatum; |
| 468 | struct ebitmap bitmap; |
Stephen Smalley | 782ebb9 | 2005-09-03 15:55:16 -0700 | [diff] [blame] | 469 | struct ebitmap_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | int l, i; |
| 471 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 472 | if (!policydb.mls_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | return 0; |
| 474 | |
| 475 | for (l = 0; l < 2; l++) { |
| 476 | levdatum = hashtab_search(newp->p_levels.table, |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 477 | sym_name(oldp, SYM_LEVELS, |
| 478 | c->range.level[l].sens - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
| 480 | if (!levdatum) |
| 481 | return -EINVAL; |
| 482 | c->range.level[l].sens = levdatum->level->sens; |
| 483 | |
| 484 | ebitmap_init(&bitmap); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 485 | ebitmap_for_each_positive_bit(&c->range.level[l].cat, node, i) { |
| 486 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 488 | catdatum = hashtab_search(newp->p_cats.table, |
Eric Paris | ac76c05 | 2010-11-29 15:47:09 -0500 | [diff] [blame] | 489 | sym_name(oldp, SYM_CATS, i)); |
KaiGai Kohei | 9fe79ad | 2007-09-29 02:20:55 +0900 | [diff] [blame] | 490 | if (!catdatum) |
| 491 | return -EINVAL; |
| 492 | rc = ebitmap_set_bit(&bitmap, catdatum->value - 1, 1); |
| 493 | if (rc) |
| 494 | return rc; |
Dave Jones | 9a591f3 | 2014-05-15 15:02:53 -0400 | [diff] [blame] | 495 | |
| 496 | cond_resched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | ebitmap_destroy(&c->range.level[l].cat); |
| 499 | c->range.level[l].cat = bitmap; |
| 500 | } |
| 501 | |
| 502 | return 0; |
| 503 | } |
| 504 | |
| 505 | int mls_compute_sid(struct context *scontext, |
| 506 | struct context *tcontext, |
| 507 | u16 tclass, |
| 508 | u32 specified, |
Harry Ciao | 6f5317e | 2011-03-02 13:32:33 +0800 | [diff] [blame] | 509 | struct context *newcontext, |
| 510 | bool sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | { |
Stephen Smalley | 2f3e82d | 2010-01-07 15:55:16 -0500 | [diff] [blame] | 512 | struct range_trans rtr; |
| 513 | struct mls_range *r; |
Eric Paris | aa89326 | 2012-03-20 14:35:12 -0400 | [diff] [blame] | 514 | struct class_datum *cladatum; |
| 515 | int default_range = 0; |
Darrel Goeddel | f3f8771 | 2006-09-25 23:31:59 -0700 | [diff] [blame] | 516 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 517 | if (!policydb.mls_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | return 0; |
| 519 | |
| 520 | switch (specified) { |
| 521 | case AVTAB_TRANSITION: |
Darrel Goeddel | f3f8771 | 2006-09-25 23:31:59 -0700 | [diff] [blame] | 522 | /* Look for a range transition rule. */ |
Stephen Smalley | 2f3e82d | 2010-01-07 15:55:16 -0500 | [diff] [blame] | 523 | rtr.source_type = scontext->type; |
| 524 | rtr.target_type = tcontext->type; |
| 525 | rtr.target_class = tclass; |
| 526 | r = hashtab_search(policydb.range_tr, &rtr); |
| 527 | if (r) |
| 528 | return mls_range_set(newcontext, r); |
Eric Paris | aa89326 | 2012-03-20 14:35:12 -0400 | [diff] [blame] | 529 | |
| 530 | if (tclass && tclass <= policydb.p_classes.nprim) { |
| 531 | cladatum = policydb.class_val_to_struct[tclass - 1]; |
| 532 | if (cladatum) |
| 533 | default_range = cladatum->default_range; |
| 534 | } |
| 535 | |
| 536 | switch (default_range) { |
| 537 | case DEFAULT_SOURCE_LOW: |
| 538 | return mls_context_cpy_low(newcontext, scontext); |
| 539 | case DEFAULT_SOURCE_HIGH: |
| 540 | return mls_context_cpy_high(newcontext, scontext); |
| 541 | case DEFAULT_SOURCE_LOW_HIGH: |
| 542 | return mls_context_cpy(newcontext, scontext); |
| 543 | case DEFAULT_TARGET_LOW: |
| 544 | return mls_context_cpy_low(newcontext, tcontext); |
| 545 | case DEFAULT_TARGET_HIGH: |
| 546 | return mls_context_cpy_high(newcontext, tcontext); |
| 547 | case DEFAULT_TARGET_LOW_HIGH: |
| 548 | return mls_context_cpy(newcontext, tcontext); |
| 549 | } |
| 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | /* Fallthrough */ |
| 552 | case AVTAB_CHANGE: |
Harry Ciao | 6f5317e | 2011-03-02 13:32:33 +0800 | [diff] [blame] | 553 | if ((tclass == policydb.process_class) || (sock == true)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | /* Use the process MLS attributes. */ |
Venkat Yekkirala | 0efc61e | 2006-12-12 13:02:41 -0600 | [diff] [blame] | 555 | return mls_context_cpy(newcontext, scontext); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | else |
| 557 | /* Use the process effective MLS attributes. */ |
Venkat Yekkirala | 0efc61e | 2006-12-12 13:02:41 -0600 | [diff] [blame] | 558 | return mls_context_cpy_low(newcontext, scontext); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | case AVTAB_MEMBER: |
Eamon Walsh | 2e08c0c | 2008-01-24 15:30:52 -0500 | [diff] [blame] | 560 | /* Use the process effective MLS attributes. */ |
| 561 | return mls_context_cpy_low(newcontext, scontext); |
Amerigo Wang | 08e3daf | 2009-12-03 03:48:28 -0500 | [diff] [blame] | 562 | |
| 563 | /* fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
| 565 | return -EINVAL; |
| 566 | } |
| 567 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 568 | #ifdef CONFIG_NETLABEL |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 569 | /** |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 570 | * mls_export_netlbl_lvl - Export the MLS sensitivity levels to NetLabel |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 571 | * @context: the security context |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 572 | * @secattr: the NetLabel security attributes |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 573 | * |
| 574 | * Description: |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 575 | * Given the security context copy the low MLS sensitivity level into the |
| 576 | * NetLabel MLS sensitivity level field. |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 577 | * |
| 578 | */ |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 579 | void mls_export_netlbl_lvl(struct context *context, |
| 580 | struct netlbl_lsm_secattr *secattr) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 581 | { |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 582 | if (!policydb.mls_enabled) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 583 | return; |
| 584 | |
Paul Moore | 16efd45 | 2008-01-29 08:37:59 -0500 | [diff] [blame] | 585 | secattr->attr.mls.lvl = context->range.level[0].sens - 1; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 586 | secattr->flags |= NETLBL_SECATTR_MLS_LVL; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | /** |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 590 | * mls_import_netlbl_lvl - Import the NetLabel MLS sensitivity levels |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 591 | * @context: the security context |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 592 | * @secattr: the NetLabel security attributes |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 593 | * |
| 594 | * Description: |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 595 | * Given the security context and the NetLabel security attributes, copy the |
| 596 | * NetLabel MLS sensitivity level into the context. |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 597 | * |
| 598 | */ |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 599 | void mls_import_netlbl_lvl(struct context *context, |
| 600 | struct netlbl_lsm_secattr *secattr) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 601 | { |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 602 | if (!policydb.mls_enabled) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 603 | return; |
| 604 | |
Paul Moore | 16efd45 | 2008-01-29 08:37:59 -0500 | [diff] [blame] | 605 | context->range.level[0].sens = secattr->attr.mls.lvl + 1; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 606 | context->range.level[1].sens = context->range.level[0].sens; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | /** |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 610 | * mls_export_netlbl_cat - Export the MLS categories to NetLabel |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 611 | * @context: the security context |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 612 | * @secattr: the NetLabel security attributes |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 613 | * |
| 614 | * Description: |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 615 | * Given the security context copy the low MLS categories into the NetLabel |
| 616 | * MLS category field. Returns zero on success, negative values on failure. |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 617 | * |
| 618 | */ |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 619 | int mls_export_netlbl_cat(struct context *context, |
| 620 | struct netlbl_lsm_secattr *secattr) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 621 | { |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 622 | int rc; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 623 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 624 | if (!policydb.mls_enabled) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 625 | return 0; |
| 626 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 627 | rc = ebitmap_netlbl_export(&context->range.level[0].cat, |
Paul Moore | 16efd45 | 2008-01-29 08:37:59 -0500 | [diff] [blame] | 628 | &secattr->attr.mls.cat); |
| 629 | if (rc == 0 && secattr->attr.mls.cat != NULL) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 630 | secattr->flags |= NETLBL_SECATTR_MLS_CAT; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 631 | |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 632 | return rc; |
| 633 | } |
| 634 | |
| 635 | /** |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 636 | * mls_import_netlbl_cat - Import the MLS categories from NetLabel |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 637 | * @context: the security context |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 638 | * @secattr: the NetLabel security attributes |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 639 | * |
| 640 | * Description: |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 641 | * Copy the NetLabel security attributes into the SELinux context; since the |
| 642 | * NetLabel security attribute only contains a single MLS category use it for |
| 643 | * both the low and high categories of the context. Returns zero on success, |
| 644 | * negative values on failure. |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 645 | * |
| 646 | */ |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 647 | int mls_import_netlbl_cat(struct context *context, |
| 648 | struct netlbl_lsm_secattr *secattr) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 649 | { |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 650 | int rc; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 651 | |
Guido Trentalancia | 0719aaf | 2010-02-03 16:40:20 +0100 | [diff] [blame] | 652 | if (!policydb.mls_enabled) |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 653 | return 0; |
| 654 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 655 | rc = ebitmap_netlbl_import(&context->range.level[0].cat, |
Paul Moore | 16efd45 | 2008-01-29 08:37:59 -0500 | [diff] [blame] | 656 | secattr->attr.mls.cat); |
Paul Moore | da8026f | 2015-02-17 15:30:23 -0500 | [diff] [blame] | 657 | if (rc) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 658 | goto import_netlbl_cat_failure; |
Paul Moore | da8026f | 2015-02-17 15:30:23 -0500 | [diff] [blame] | 659 | memcpy(&context->range.level[1].cat, &context->range.level[0].cat, |
| 660 | sizeof(context->range.level[0].cat)); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 661 | |
| 662 | return 0; |
| 663 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 664 | import_netlbl_cat_failure: |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 665 | ebitmap_destroy(&context->range.level[0].cat); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 666 | return rc; |
| 667 | } |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 668 | #endif /* CONFIG_NETLABEL */ |