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7029 want per-process exploit mitigation features (secflags)
7030 want basic address space layout randomization (aslr)
7031 noexec_user_stack should be a secflag
7032 want a means to forbid mappings around NULL.
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--- old/usr/src/uts/common/os/privs.awk
+++ new/usr/src/uts/common/os/privs.awk
1 1 #
2 2 # Copyright 2005 Sun Microsystems, Inc. All rights reserved.
3 3 # Use is subject to license terms.
4 4 #
5 5 # CDDL HEADER START
6 6 #
7 7 # The contents of this file are subject to the terms of the
8 8 # Common Development and Distribution License, Version 1.0 only
9 9 # (the "License"). You may not use this file except in compliance
10 10 # with the License.
11 11 #
12 12 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
13 13 # or http://www.opensolaris.org/os/licensing.
14 14 # See the License for the specific language governing permissions
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15 15 # and limitations under the License.
16 16 #
17 17 # When distributing Covered Code, include this CDDL HEADER in each
18 18 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
19 19 # If applicable, add the following below this CDDL HEADER, with the
20 20 # fields enclosed by brackets "[]" replaced with your own identifying
21 21 # information: Portions Copyright [yyyy] [name of copyright owner]
22 22 #
23 23 # CDDL HEADER END
24 24 #
25 -#ident "%Z%%M% %I% %E% SMI"
25 +
26 26 #
27 27 # This file generates three different C files:
28 28 #
29 29 # <sys/priv_const.h>
30 30 # An implementation private set of manifest integer constant
31 31 # for privileges and privilege sets and manifest constants for
32 32 # set size, number of sets, number of privileges
33 33 #
34 34 # os/priv_const.c
35 35 # A C source file containing the set names, privilege names
36 36 # arrays for the name <-> number mappings
37 37 #
38 38 # <sys/priv_names.h>
39 39 # A public header file containing the PRIV_* defines
40 40 # that map to strings; these are for convenience.
41 41 # (it's easy to misspell a string, harder to misspell a
42 42 # manifest constant)
43 43 #
44 44 # /etc/security/priv_names
45 45 # A privilege name to explanation mapping.
46 46 #
47 47 #
48 48 # The files are output on the awk variable privhfile, pubhfile, cfile,
49 49 # and pnamesfile respectively
50 50 #
51 51 # The input file should contain a standard Sun comment and ident string
52 52 # which is copied verbatim and lines of
53 53 #
54 54 # [keyword] privilege PRIV_<privilege>
55 55 # set PRIV_<set>
56 56 #
57 57 # Which are converted to privileges and privilege sets
58 58 #
59 59
60 60
61 61 BEGIN {
62 62 # Number of privileges read
63 63 npriv = 0
64 64
65 65 # Number of privilege sets
66 66 nset = 0
67 67
68 68 # Length of all strings concatenated, including \0
69 69 privbytes = 0
70 70 setbytes = 0
71 71
72 72 # Number of reserved privilege slots
73 73 slack = 10
74 74
75 75 privhcmt = \
76 76 " * Privilege constant definitions; these constants are subject to\n" \
77 77 " * change, including renumbering, without notice and should not be\n" \
78 78 " * used in any code. Privilege names must be used instead.\n" \
79 79 " * Privileges and privilege sets must not be stored in binary\n" \
80 80 " * form; privileges and privileges sets must be converted to\n" \
81 81 " * textual representation before being committed to persistent store."
82 82
83 83 ccmt = \
84 84 " * Privilege name table and size definitions."
85 85
86 86 pubhcmt = \
87 87 " * Privilege constant definitions. Privileges and privilege sets\n" \
88 88 " * are only known by name and should be mapped at runtime."
89 89
90 90 pnamescmt = \
91 91 "#\n" \
92 92 "# Privilege name explanation file\n" \
93 93 "# The format of entries is a privilege name starting at the\n" \
94 94 "# beginning of a line directly folowed by a new line followed\n" \
95 95 "# by several lines of texts starting with white space terminated\n" \
96 96 "# by a line with a single newline or not starting with white space\n" \
97 97 "#\n"
98 98 }
99 99
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100 100 #
101 101 # Privilege strings are represented as lower case strings;
102 102 # PRIV_ is stripped from the strings.
103 103 #
104 104 /^([A-Za-z]* )?privilege / {
105 105 if (NF == 3) {
106 106 key = toupper($1)
107 107 priv = toupper($3)
108 108 if (set[key] != "")
109 109 set[key] = set[key] ";"
110 - set[key] = set[key] "\\\n\t\tPRIV_ASSERT((set), " priv ")"
110 + set[key] = set[key] "\\\n\t\tPRIV_ADDSET((set), " priv ")"
111 111 } else {
112 112 priv = toupper($2);
113 113 }
114 114 privs[npriv] = tolower(substr(priv, 6));
115 115 inset = 0
116 116 inpriv = 1
117 117
118 118 privind[npriv] = privbytes;
119 119
120 120 tabs = (32 - length(priv) - 1)/8
121 121 # length + \0 - PRIV_
122 122 privbytes += length(priv) - 4
123 123 pdef[npriv] = "#define\t" priv substr("\t\t\t\t\t", 1, tabs)
124 124
125 125 npriv++
126 126 next
127 127 }
128 128
129 129 #
130 130 # Set strings are represented as strings with an initial cap;
131 131 # PRIV_ is stripped from the strings.
132 132 #
133 133 /^set / {
134 134 $2 = toupper($2)
135 135 sets[nset] = toupper(substr($2, 6, 1)) tolower(substr($2, 7));
136 136 inset = 1
137 137 inpriv = 0
138 138
139 139 setind[nset] = setbytes
140 140
141 141 # length + \0 - PRIV_
142 142 setbytes += length($2) - 4
143 143 tabs = (32 - length($2) - 1)/8
144 144 sdef[nset] = "#define\t" $2 substr("\t\t\t\t\t", 1, tabs)
145 145
146 146 nset++
147 147 next
148 148 }
149 149
150 150 /INSERT COMMENT/ {
151 151 acmt = " *\n * THIS FILE WAS GENERATED; DO NOT EDIT"
152 152 if (cfile) {
153 153 print ccmt > cfile
154 154 print acmt > cfile
155 155 }
156 156 if (privhfile) {
157 157 print privhcmt > privhfile
158 158 print acmt > privhfile
159 159 }
160 160 if (pubhfile) {
161 161 print pubhcmt > pubhfile
162 162 print acmt > pubhfile
163 163 }
164 164 next
165 165 }
166 166 /^#pragma/ {
167 167 pragma = $0;
168 168 if (pnamesfile) {
169 169 print "#" substr($0, 9) > pnamesfile
170 170 }
171 171 next;
172 172 }
173 173
174 174 /^#/ && ! /^#pragma/{
175 175 # Comments, ignore
176 176 next
177 177 }
178 178
179 179 {
180 180 #
181 181 # Comments describing privileges and sets follow the definitions.
182 182 #
183 183 if (inset || inpriv) {
184 184 sub("^[ ]*", "")
185 185 sub("[ ]*$", "")
186 186 if (/^$/) next;
187 187 }
188 188 if (inset) {
189 189 setcmt[nset - 1] = setcmt[nset - 1] " * " $0 "\n"
190 190 next
191 191 } else if (inpriv) {
192 192 sub("^[ ]*", "")
193 193 privcmt[npriv - 1] = privcmt[npriv - 1] " * " $0 "\n"
194 194 privncmt[npriv - 1] = privncmt[npriv - 1] "\t" $0 "\n"
195 195 next
196 196 }
197 197
198 198 if (cfile)
199 199 print > cfile
200 200 if (privhfile)
201 201 print > privhfile
202 202 if (pubhfile)
203 203 print > pubhfile
204 204 if (pnamesfile) {
205 205 sub("^/\\*", "#")
206 206 sub("^ \\*/", "")
207 207 sub("^ \\*", "#")
208 208 if (/^$/) next;
209 209 print > pnamesfile
210 210 }
211 211 }
212 212
213 213 END {
214 214
215 215 if (!pubhfile && !privhfile && !cfile && !pnamesfile) {
216 216 print "Output file parameter not set" > "/dev/stderr"
217 217 exit 1
218 218 }
219 219
220 220 setsize = int((npriv + slack)/(8 * 4)) + 1
221 221 maxnpriv = setsize * 8 * 4
222 222 # Assume allocated privileges are on average "NSDQ" bytes larger.
223 223 maxprivbytes = int((privbytes / npriv + 5.5)) * (maxnpriv - npriv)
224 224 maxprivbytes += privbytes
225 225
226 226 if (cfile) {
227 227 print "\n" > cfile
228 228 print pragma "\n"> cfile
229 229 print "#include <sys/types.h>" > cfile
230 230 print "#include <sys/priv_const.h>" > cfile
231 231 print "#include <sys/priv_impl.h>" > cfile
232 232 print "#include <sys/priv.h>" > cfile
233 233 print "#include <sys/sysmacros.h>" > cfile
234 234 print "\n" > cfile
235 235 #
236 236 # Create the entire priv info structure here.
237 237 # When adding privileges, the kernel needs to update
238 238 # too many fields as the number of privileges is kept in
239 239 # many places.
240 240 #
241 241 print \
242 242 "static struct _info {\n" \
243 243 " priv_impl_info_t impl_info;\n" \
244 244 " priv_info_t settype;\n" \
245 245 " int nsets;\n" \
246 246 " const char sets[" setbytes "];\n" \
247 247 " priv_info_t privtype;\n" \
248 248 " int nprivs;\n" \
249 249 " char privs[" maxprivbytes "];\n" \
250 250 " priv_info_t sysset;\n" \
251 251 " priv_set_t basicset;\n" \
252 252 "} info = {\n" \
253 253 " { sizeof (priv_impl_info_t), 0, PRIV_NSET, " \
254 254 "PRIV_SETSIZE, " npriv ",\n" \
255 255 "\t\tsizeof (priv_info_uint_t),\n" \
256 256 "\t\tsizeof (info) - sizeof (info.impl_info)},\n" \
257 257 " { PRIV_INFO_SETNAMES,\n" \
258 258 " offsetof(struct _info, privtype) - " \
259 259 "offsetof(struct _info, settype)},\n\tPRIV_NSET," > cfile
260 260
261 261 sep = "\t\""
262 262 len = 9;
263 263 for (i = 0; i < nset; i++) {
264 264 if (len + length(sets[i]) > 80) {
265 265 sep = "\\0\"\n\t\""
266 266 len = 9
267 267 }
268 268 printf sep sets[i] > cfile
269 269 len += length(sets[i]) + length(sep);
270 270 sep = "\\0"
271 271 }
272 272 print "\\0\"," > cfile
273 273
274 274 print "\t{ PRIV_INFO_PRIVNAMES,\n\t " \
275 275 "offsetof(struct _info, sysset) - " \
276 276 "offsetof(struct _info, privtype)},\n\t" npriv "," \
277 277 > cfile
278 278
279 279 sep = "\t\""
280 280 len = 9;
281 281 for (i = 0; i < npriv; i++) {
282 282 if (len + length(privs[i]) > 80) {
283 283 sep = "\\0\"\n\t\""
284 284 len = 9
285 285 }
286 286 printf sep privs[i] > cfile
287 287 len += length(privs[i]) + length(sep);
288 288 sep = "\\0"
289 289 }
290 290 print "\\0\"," > cfile
291 291
292 292 print "\t{ PRIV_INFO_BASICPRIVS, sizeof (info) - " \
293 293 "offsetof(struct _info, sysset)}," > cfile
294 294
295 295 print "};\n" > cfile
296 296
297 297 print "\nconst char *priv_names[" maxnpriv "] =\n{" > cfile
298 298 for (i = 0; i < npriv; i++)
299 299 print "\t&info.privs[" privind[i] "]," > cfile
300 300
301 301 print "};\n" > cfile
302 302
303 303 print "\nconst char *priv_setnames[" nset "] =\n{" > cfile
304 304 for (i = 0; i < nset; i++)
305 305 print "\t&info.sets[" setind[i] "]," > cfile
306 306
307 307 print "};\n" > cfile
308 308
309 309 print "int nprivs = " npriv ";" > cfile
310 310 print "int privbytes = " privbytes ";" > cfile
311 311 print "int maxprivbytes = " maxprivbytes ";" > cfile
312 312 print "size_t privinfosize = sizeof (info);" > cfile
313 313 print "char *priv_str = info.privs;" > cfile
314 314 print "priv_set_t *priv_basic = &info.basicset;" > cfile
315 315 print "priv_impl_info_t *priv_info = &info.impl_info;" > cfile
316 316 print "priv_info_names_t *priv_ninfo = " \
317 317 "(priv_info_names_t *)&info.privtype;" > cfile
318 318 close(cfile)
319 319 }
320 320
321 321 # Kernel private
322 322 if (privhfile) {
323 323 print "#ifndef _SYS_PRIV_CONST_H" > privhfile
324 324 print "#define\t_SYS_PRIV_CONST_H\n" > privhfile
325 325 print pragma "\n"> privhfile
326 326 print "\n#include <sys/types.h>\n\n" > privhfile
327 327 print "#ifdef __cplusplus\nextern \"C\" {\n#endif\n" > privhfile
328 328
329 329 print "#if defined(_KERNEL) || defined(_KMEMUSER)" > privhfile
330 330 print "#define\tPRIV_NSET\t\t\t " nset > privhfile
331 331 print "#define\tPRIV_SETSIZE\t\t\t " setsize > privhfile
332 332 print "#endif\n\n#ifdef _KERNEL" > privhfile
333 333 print "#define\t__PRIV_CONST_IMPL\n" > privhfile
334 334 print "extern const char *priv_names[];" > privhfile
335 335 print "extern const char *priv_setnames[];" > privhfile
336 336
337 337 print "extern int nprivs;" > privhfile
338 338 print "extern int privbytes;" > privhfile
339 339 print "extern int maxprivbytes;" > privhfile
340 340 print "extern size_t privinfosize;" > privhfile
341 341 print "extern char *priv_str;" > privhfile
342 342 print "extern struct priv_set *priv_basic;" > privhfile
343 343 print "extern struct priv_impl_info *priv_info;" > privhfile
344 344 print "extern struct priv_info_names *priv_ninfo;" > privhfile
345 345
346 346 print "\n/* Privileges */" > privhfile
347 347
348 348 for (i = 0; i < npriv; i++)
349 349 print pdef[i] sprintf("%3d", i) > privhfile
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350 350
351 351 print "\n/* Privilege sets */" > privhfile
352 352 for (i = 0; i < nset; i++)
353 353 print sdef[i] sprintf("%3d", i) > privhfile
354 354
355 355 print "\n#define\tMAX_PRIVILEGE\t\t\t " setsize * 32 \
356 356 > privhfile
357 357
358 358 # Special privilege categories.
359 359 for (s in set)
360 - print "\n#define\tPRIV_" s "_ASSERT(set)" set[s] \
360 + print "\n#define\tPRIV_" s "_ADDSET(set)" set[s] \
361 361 > privhfile
362 362
363 363 print "\n#endif /* _KERNEL */" > privhfile
364 364 print "\n#ifdef __cplusplus\n}\n#endif" > privhfile
365 365 print "\n#endif /* _SYS_PRIV_CONST_H */" > privhfile
366 366 close(privhfile)
367 367 }
368 368
369 369 if (pubhfile) {
370 370 cast="((const char *)"
371 371 print "#ifndef _SYS_PRIV_NAMES_H" > pubhfile
372 372 print "#define\t_SYS_PRIV_NAMES_H\n" > pubhfile
373 373
374 374 print pragma "\n" > pubhfile
375 375 print "#ifdef __cplusplus\nextern \"C\" {\n#endif\n" > pubhfile
376 376
377 377 print "#ifndef __PRIV_CONST_IMPL" > pubhfile
378 378 print "/*\n * Privilege names\n */" > pubhfile
379 379 for (i = 0; i < npriv; i++) {
380 380 print "/*\n" privcmt[i] " */" > pubhfile
381 381 print pdef[i] cast "\"" privs[i] "\")\n" > pubhfile
382 382 }
383 383
384 384 print "" > pubhfile
385 385
386 386 print "/*\n * Privilege set names\n */" > pubhfile
387 387 for (i = 0; i < nset; i++) {
388 388 print "/*\n" setcmt[i] " */" > pubhfile
389 389 print sdef[i] cast "\"" sets[i] "\")\n" > pubhfile
390 390 }
391 391
392 392 print "\n#endif /* __PRIV_CONST_IMPL */" > pubhfile
393 393 print "\n#ifdef __cplusplus\n}\n#endif" > pubhfile
394 394 print "\n#endif /* _SYS_PRIV_NAMES_H */" > pubhfile
395 395 close(pubhfile)
396 396 }
397 397
398 398 if (pnamesfile) {
399 399 print pnamescmt > pnamesfile
400 400 for (i = 0; i < npriv; i++) {
401 401 print privs[i] > pnamesfile
402 402 print privncmt[i] > pnamesfile
403 403 }
404 404 }
405 405
406 406 }
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