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Commit | Line | Data |
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9aeaf1b4 | 1 | /* v3_utl.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
4e5d3a7f | 4 | * project. |
9aeaf1b4 DSH |
5 | */ |
6 | /* ==================================================================== | |
4e5d3a7f | 7 | * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved. |
9aeaf1b4 DSH |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
9aeaf1b4 DSH |
15 | * |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * licensing@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | * | |
54 | * This product includes cryptographic software written by Eric Young | |
55 | * (eay@cryptsoft.com). This product includes software written by Tim | |
56 | * Hudson (tjh@cryptsoft.com). | |
57 | * | |
58 | */ | |
59 | /* X509 v3 extension utilities */ | |
60 | ||
e527ba09 | 61 | #include <stdio.h> |
9aeaf1b4 | 62 | #include <ctype.h> |
e527ba09 | 63 | #include "cryptlib.h" |
ec577822 BM |
64 | #include <openssl/conf.h> |
65 | #include <openssl/x509v3.h> | |
0f814687 | 66 | #include <openssl/bn.h> |
9aeaf1b4 | 67 | |
9aeaf1b4 | 68 | static char *strip_spaces(char *name); |
0f113f3e MC |
69 | static int sk_strcmp(const char *const *a, const char *const *b); |
70 | static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, | |
71 | GENERAL_NAMES *gens); | |
c869da88 DSH |
72 | static void str_free(OPENSSL_STRING str); |
73 | static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email); | |
9aeaf1b4 | 74 | |
4e5d3a7f DSH |
75 | static int ipv4_from_asc(unsigned char *v4, const char *in); |
76 | static int ipv6_from_asc(unsigned char *v6, const char *in); | |
77 | static int ipv6_cb(const char *elem, int len, void *usr); | |
78 | static int ipv6_hex(unsigned char *out, const char *in, int inlen); | |
79 | ||
9aeaf1b4 DSH |
80 | /* Add a CONF_VALUE name value pair to stack */ |
81 | ||
ba404b5e | 82 | int X509V3_add_value(const char *name, const char *value, |
0f113f3e | 83 | STACK_OF(CONF_VALUE) **extlist) |
9aeaf1b4 | 84 | { |
0f113f3e MC |
85 | CONF_VALUE *vtmp = NULL; |
86 | char *tname = NULL, *tvalue = NULL; | |
87 | if (name && !(tname = BUF_strdup(name))) | |
88 | goto err; | |
89 | if (value && !(tvalue = BUF_strdup(value))) | |
90 | goto err; | |
91 | if (!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) | |
92 | goto err; | |
93 | if (!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) | |
94 | goto err; | |
95 | vtmp->section = NULL; | |
96 | vtmp->name = tname; | |
97 | vtmp->value = tvalue; | |
98 | if (!sk_CONF_VALUE_push(*extlist, vtmp)) | |
99 | goto err; | |
100 | return 1; | |
101 | err: | |
102 | X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE); | |
103 | if (vtmp) | |
104 | OPENSSL_free(vtmp); | |
105 | if (tname) | |
106 | OPENSSL_free(tname); | |
107 | if (tvalue) | |
108 | OPENSSL_free(tvalue); | |
109 | return 0; | |
9aeaf1b4 DSH |
110 | } |
111 | ||
61f5b6f3 | 112 | int X509V3_add_value_uchar(const char *name, const unsigned char *value, |
0f113f3e MC |
113 | STACK_OF(CONF_VALUE) **extlist) |
114 | { | |
115 | return X509V3_add_value(name, (const char *)value, extlist); | |
116 | } | |
61f5b6f3 | 117 | |
66ab08b1 | 118 | /* Free function for STACK_OF(CONF_VALUE) */ |
9aeaf1b4 | 119 | |
6b691a5c | 120 | void X509V3_conf_free(CONF_VALUE *conf) |
9aeaf1b4 | 121 | { |
0f113f3e MC |
122 | if (!conf) |
123 | return; | |
124 | if (conf->name) | |
125 | OPENSSL_free(conf->name); | |
126 | if (conf->value) | |
127 | OPENSSL_free(conf->value); | |
128 | if (conf->section) | |
129 | OPENSSL_free(conf->section); | |
130 | OPENSSL_free(conf); | |
9aeaf1b4 DSH |
131 | } |
132 | ||
ba404b5e | 133 | int X509V3_add_value_bool(const char *name, int asn1_bool, |
0f113f3e | 134 | STACK_OF(CONF_VALUE) **extlist) |
9aeaf1b4 | 135 | { |
0f113f3e MC |
136 | if (asn1_bool) |
137 | return X509V3_add_value(name, "TRUE", extlist); | |
138 | return X509V3_add_value(name, "FALSE", extlist); | |
9aeaf1b4 DSH |
139 | } |
140 | ||
ba404b5e | 141 | int X509V3_add_value_bool_nf(char *name, int asn1_bool, |
0f113f3e | 142 | STACK_OF(CONF_VALUE) **extlist) |
9aeaf1b4 | 143 | { |
0f113f3e MC |
144 | if (asn1_bool) |
145 | return X509V3_add_value(name, "TRUE", extlist); | |
146 | return 1; | |
9aeaf1b4 DSH |
147 | } |
148 | ||
6b691a5c | 149 | char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a) |
c74f1eb9 | 150 | { |
0f113f3e MC |
151 | BIGNUM *bntmp = NULL; |
152 | char *strtmp = NULL; | |
153 | if (!a) | |
154 | return NULL; | |
155 | if (!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) || | |
156 | !(strtmp = BN_bn2dec(bntmp))) | |
157 | X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE); | |
158 | BN_free(bntmp); | |
159 | return strtmp; | |
c74f1eb9 DSH |
160 | } |
161 | ||
6b691a5c | 162 | char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a) |
0ca5f8b1 | 163 | { |
0f113f3e MC |
164 | BIGNUM *bntmp = NULL; |
165 | char *strtmp = NULL; | |
166 | if (!a) | |
167 | return NULL; | |
168 | if (!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) || | |
169 | !(strtmp = BN_bn2dec(bntmp))) | |
170 | X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE); | |
171 | BN_free(bntmp); | |
172 | return strtmp; | |
0ca5f8b1 DSH |
173 | } |
174 | ||
6b691a5c | 175 | ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value) |
28a98809 | 176 | { |
0f113f3e MC |
177 | BIGNUM *bn = NULL; |
178 | ASN1_INTEGER *aint; | |
179 | int isneg, ishex; | |
180 | int ret; | |
181 | if (!value) { | |
182 | X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE); | |
183 | return 0; | |
184 | } | |
185 | bn = BN_new(); | |
186 | if (value[0] == '-') { | |
187 | value++; | |
188 | isneg = 1; | |
189 | } else | |
190 | isneg = 0; | |
191 | ||
192 | if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) { | |
193 | value += 2; | |
194 | ishex = 1; | |
195 | } else | |
196 | ishex = 0; | |
197 | ||
198 | if (ishex) | |
199 | ret = BN_hex2bn(&bn, value); | |
200 | else | |
201 | ret = BN_dec2bn(&bn, value); | |
202 | ||
203 | if (!ret || value[ret]) { | |
204 | BN_free(bn); | |
205 | X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR); | |
206 | return 0; | |
207 | } | |
208 | ||
209 | if (isneg && BN_is_zero(bn)) | |
210 | isneg = 0; | |
211 | ||
212 | aint = BN_to_ASN1_INTEGER(bn, NULL); | |
213 | BN_free(bn); | |
214 | if (!aint) { | |
215 | X509V3err(X509V3_F_S2I_ASN1_INTEGER, | |
216 | X509V3_R_BN_TO_ASN1_INTEGER_ERROR); | |
217 | return 0; | |
218 | } | |
219 | if (isneg) | |
220 | aint->type |= V_ASN1_NEG; | |
221 | return aint; | |
28a98809 DSH |
222 | } |
223 | ||
6b691a5c | 224 | int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint, |
0f113f3e | 225 | STACK_OF(CONF_VALUE) **extlist) |
9aeaf1b4 | 226 | { |
0f113f3e MC |
227 | char *strtmp; |
228 | int ret; | |
229 | if (!aint) | |
230 | return 1; | |
231 | if (!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) | |
232 | return 0; | |
233 | ret = X509V3_add_value(name, strtmp, extlist); | |
234 | OPENSSL_free(strtmp); | |
235 | return ret; | |
9aeaf1b4 DSH |
236 | } |
237 | ||
6b691a5c | 238 | int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool) |
9aeaf1b4 | 239 | { |
0f113f3e MC |
240 | char *btmp; |
241 | if (!(btmp = value->value)) | |
242 | goto err; | |
243 | if (!strcmp(btmp, "TRUE") || !strcmp(btmp, "true") | |
244 | || !strcmp(btmp, "Y") || !strcmp(btmp, "y") | |
245 | || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) { | |
246 | *asn1_bool = 0xff; | |
247 | return 1; | |
248 | } else if (!strcmp(btmp, "FALSE") || !strcmp(btmp, "false") | |
249 | || !strcmp(btmp, "N") || !strcmp(btmp, "n") | |
250 | || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) { | |
251 | *asn1_bool = 0; | |
252 | return 1; | |
253 | } | |
254 | err: | |
255 | X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL, | |
256 | X509V3_R_INVALID_BOOLEAN_STRING); | |
257 | X509V3_conf_err(value); | |
258 | return 0; | |
9aeaf1b4 DSH |
259 | } |
260 | ||
6b691a5c | 261 | int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint) |
9aeaf1b4 | 262 | { |
0f113f3e MC |
263 | ASN1_INTEGER *itmp; |
264 | if (!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) { | |
265 | X509V3_conf_err(value); | |
266 | return 0; | |
267 | } | |
268 | *aint = itmp; | |
269 | return 1; | |
9aeaf1b4 DSH |
270 | } |
271 | ||
0f113f3e MC |
272 | #define HDR_NAME 1 |
273 | #define HDR_VALUE 2 | |
9aeaf1b4 | 274 | |
0f113f3e MC |
275 | /* |
276 | * #define DEBUG | |
277 | */ | |
9aeaf1b4 | 278 | |
535d79da | 279 | STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line) |
9aeaf1b4 | 280 | { |
0f113f3e MC |
281 | char *p, *q, c; |
282 | char *ntmp, *vtmp; | |
283 | STACK_OF(CONF_VALUE) *values = NULL; | |
284 | char *linebuf; | |
285 | int state; | |
286 | /* We are going to modify the line so copy it first */ | |
287 | linebuf = BUF_strdup(line); | |
288 | state = HDR_NAME; | |
289 | ntmp = NULL; | |
290 | /* Go through all characters */ | |
291 | for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n'); | |
292 | p++) { | |
293 | ||
294 | switch (state) { | |
295 | case HDR_NAME: | |
296 | if (c == ':') { | |
297 | state = HDR_VALUE; | |
298 | *p = 0; | |
299 | ntmp = strip_spaces(q); | |
300 | if (!ntmp) { | |
301 | X509V3err(X509V3_F_X509V3_PARSE_LIST, | |
302 | X509V3_R_INVALID_NULL_NAME); | |
303 | goto err; | |
304 | } | |
305 | q = p + 1; | |
306 | } else if (c == ',') { | |
307 | *p = 0; | |
308 | ntmp = strip_spaces(q); | |
309 | q = p + 1; | |
59dbdb51 | 310 | #if 0 |
0f113f3e | 311 | printf("%s\n", ntmp); |
9aeaf1b4 | 312 | #endif |
0f113f3e MC |
313 | if (!ntmp) { |
314 | X509V3err(X509V3_F_X509V3_PARSE_LIST, | |
315 | X509V3_R_INVALID_NULL_NAME); | |
316 | goto err; | |
317 | } | |
318 | X509V3_add_value(ntmp, NULL, &values); | |
319 | } | |
320 | break; | |
321 | ||
322 | case HDR_VALUE: | |
323 | if (c == ',') { | |
324 | state = HDR_NAME; | |
325 | *p = 0; | |
326 | vtmp = strip_spaces(q); | |
59dbdb51 | 327 | #if 0 |
0f113f3e | 328 | printf("%s\n", ntmp); |
9aeaf1b4 | 329 | #endif |
0f113f3e MC |
330 | if (!vtmp) { |
331 | X509V3err(X509V3_F_X509V3_PARSE_LIST, | |
332 | X509V3_R_INVALID_NULL_VALUE); | |
333 | goto err; | |
334 | } | |
335 | X509V3_add_value(ntmp, vtmp, &values); | |
336 | ntmp = NULL; | |
337 | q = p + 1; | |
338 | } | |
339 | ||
340 | } | |
341 | } | |
342 | ||
343 | if (state == HDR_VALUE) { | |
344 | vtmp = strip_spaces(q); | |
59dbdb51 | 345 | #if 0 |
0f113f3e | 346 | printf("%s=%s\n", ntmp, vtmp); |
9aeaf1b4 | 347 | #endif |
0f113f3e MC |
348 | if (!vtmp) { |
349 | X509V3err(X509V3_F_X509V3_PARSE_LIST, | |
350 | X509V3_R_INVALID_NULL_VALUE); | |
351 | goto err; | |
352 | } | |
353 | X509V3_add_value(ntmp, vtmp, &values); | |
354 | } else { | |
355 | ntmp = strip_spaces(q); | |
59dbdb51 | 356 | #if 0 |
0f113f3e | 357 | printf("%s\n", ntmp); |
9aeaf1b4 | 358 | #endif |
0f113f3e MC |
359 | if (!ntmp) { |
360 | X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME); | |
361 | goto err; | |
362 | } | |
363 | X509V3_add_value(ntmp, NULL, &values); | |
364 | } | |
365 | OPENSSL_free(linebuf); | |
366 | return values; | |
367 | ||
368 | err: | |
369 | OPENSSL_free(linebuf); | |
370 | sk_CONF_VALUE_pop_free(values, X509V3_conf_free); | |
371 | return NULL; | |
9aeaf1b4 DSH |
372 | |
373 | } | |
374 | ||
375 | /* Delete leading and trailing spaces from a string */ | |
6b691a5c | 376 | static char *strip_spaces(char *name) |
9aeaf1b4 | 377 | { |
0f113f3e MC |
378 | char *p, *q; |
379 | /* Skip over leading spaces */ | |
380 | p = name; | |
381 | while (*p && isspace((unsigned char)*p)) | |
382 | p++; | |
383 | if (!*p) | |
384 | return NULL; | |
385 | q = p + strlen(p) - 1; | |
386 | while ((q != p) && isspace((unsigned char)*q)) | |
387 | q--; | |
388 | if (p != q) | |
389 | q[1] = 0; | |
390 | if (!*p) | |
391 | return NULL; | |
392 | return p; | |
9aeaf1b4 | 393 | } |
175b0942 DSH |
394 | |
395 | /* hex string utilities */ | |
396 | ||
0f113f3e MC |
397 | /* |
398 | * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its | |
399 | * hex representation @@@ (Contents of buffer are always kept in ASCII, also | |
400 | * on EBCDIC machines) | |
175b0942 DSH |
401 | */ |
402 | ||
376bf1d4 | 403 | char *hex_to_string(const unsigned char *buffer, long len) |
175b0942 | 404 | { |
0f113f3e MC |
405 | char *tmp, *q; |
406 | const unsigned char *p; | |
407 | int i; | |
408 | const static char hexdig[] = "0123456789ABCDEF"; | |
409 | if (!buffer || !len) | |
410 | return NULL; | |
411 | if (!(tmp = OPENSSL_malloc(len * 3 + 1))) { | |
412 | X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE); | |
413 | return NULL; | |
414 | } | |
415 | q = tmp; | |
416 | for (i = 0, p = buffer; i < len; i++, p++) { | |
417 | *q++ = hexdig[(*p >> 4) & 0xf]; | |
418 | *q++ = hexdig[*p & 0xf]; | |
419 | *q++ = ':'; | |
420 | } | |
421 | q[-1] = 0; | |
97d8e82c | 422 | #ifdef CHARSET_EBCDIC |
0f113f3e | 423 | ebcdic2ascii(tmp, tmp, q - tmp - 1); |
97d8e82c RL |
424 | #endif |
425 | ||
0f113f3e | 426 | return tmp; |
175b0942 DSH |
427 | } |
428 | ||
0f113f3e MC |
429 | /* |
430 | * Give a string of hex digits convert to a buffer | |
175b0942 DSH |
431 | */ |
432 | ||
376bf1d4 | 433 | unsigned char *string_to_hex(const char *str, long *len) |
175b0942 | 434 | { |
0f113f3e MC |
435 | unsigned char *hexbuf, *q; |
436 | unsigned char ch, cl, *p; | |
437 | if (!str) { | |
438 | X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT); | |
439 | return NULL; | |
440 | } | |
441 | if (!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) | |
442 | goto err; | |
443 | for (p = (unsigned char *)str, q = hexbuf; *p;) { | |
444 | ch = *p++; | |
97d8e82c | 445 | #ifdef CHARSET_EBCDIC |
0f113f3e | 446 | ch = os_toebcdic[ch]; |
97d8e82c | 447 | #endif |
0f113f3e MC |
448 | if (ch == ':') |
449 | continue; | |
450 | cl = *p++; | |
97d8e82c | 451 | #ifdef CHARSET_EBCDIC |
0f113f3e | 452 | cl = os_toebcdic[cl]; |
97d8e82c | 453 | #endif |
0f113f3e MC |
454 | if (!cl) { |
455 | X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS); | |
456 | OPENSSL_free(hexbuf); | |
457 | return NULL; | |
458 | } | |
459 | if (isupper(ch)) | |
460 | ch = tolower(ch); | |
461 | if (isupper(cl)) | |
462 | cl = tolower(cl); | |
463 | ||
464 | if ((ch >= '0') && (ch <= '9')) | |
465 | ch -= '0'; | |
466 | else if ((ch >= 'a') && (ch <= 'f')) | |
467 | ch -= 'a' - 10; | |
468 | else | |
469 | goto badhex; | |
470 | ||
471 | if ((cl >= '0') && (cl <= '9')) | |
472 | cl -= '0'; | |
473 | else if ((cl >= 'a') && (cl <= 'f')) | |
474 | cl -= 'a' - 10; | |
475 | else | |
476 | goto badhex; | |
477 | ||
478 | *q++ = (ch << 4) | cl; | |
479 | } | |
175b0942 | 480 | |
0f113f3e MC |
481 | if (len) |
482 | *len = q - hexbuf; | |
175b0942 | 483 | |
0f113f3e | 484 | return hexbuf; |
175b0942 | 485 | |
0f113f3e MC |
486 | err: |
487 | if (hexbuf) | |
488 | OPENSSL_free(hexbuf); | |
489 | X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE); | |
490 | return NULL; | |
175b0942 | 491 | |
0f113f3e MC |
492 | badhex: |
493 | OPENSSL_free(hexbuf); | |
494 | X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT); | |
495 | return NULL; | |
175b0942 DSH |
496 | |
497 | } | |
d08d8da4 | 498 | |
0f113f3e MC |
499 | /* |
500 | * V2I name comparison function: returns zero if 'name' matches cmp or cmp.* | |
d08d8da4 DSH |
501 | */ |
502 | ||
6b691a5c | 503 | int name_cmp(const char *name, const char *cmp) |
d08d8da4 | 504 | { |
0f113f3e MC |
505 | int len, ret; |
506 | char c; | |
507 | len = strlen(cmp); | |
508 | if ((ret = strncmp(name, cmp, len))) | |
509 | return ret; | |
510 | c = name[len]; | |
511 | if (!c || (c == '.')) | |
512 | return 0; | |
513 | return 1; | |
d08d8da4 | 514 | } |
a91dedca | 515 | |
0f113f3e | 516 | static int sk_strcmp(const char *const *a, const char *const *b) |
a91dedca | 517 | { |
0f113f3e | 518 | return strcmp(*a, *b); |
a91dedca DSH |
519 | } |
520 | ||
c869da88 | 521 | STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x) |
a91dedca | 522 | { |
0f113f3e MC |
523 | GENERAL_NAMES *gens; |
524 | STACK_OF(OPENSSL_STRING) *ret; | |
5ce278a7 | 525 | |
0f113f3e MC |
526 | gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL); |
527 | ret = get_email(X509_get_subject_name(x), gens); | |
528 | sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free); | |
529 | return ret; | |
a91dedca DSH |
530 | } |
531 | ||
c869da88 | 532 | STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x) |
67c8e7f4 | 533 | { |
0f113f3e MC |
534 | AUTHORITY_INFO_ACCESS *info; |
535 | STACK_OF(OPENSSL_STRING) *ret = NULL; | |
536 | int i; | |
537 | ||
538 | info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL); | |
539 | if (!info) | |
540 | return NULL; | |
541 | for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) { | |
542 | ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i); | |
543 | if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) { | |
544 | if (ad->location->type == GEN_URI) { | |
545 | if (!append_ia5 | |
546 | (&ret, ad->location->d.uniformResourceIdentifier)) | |
547 | break; | |
548 | } | |
549 | } | |
550 | } | |
551 | AUTHORITY_INFO_ACCESS_free(info); | |
552 | return ret; | |
67c8e7f4 DSH |
553 | } |
554 | ||
c869da88 | 555 | STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x) |
a91dedca | 556 | { |
0f113f3e MC |
557 | GENERAL_NAMES *gens; |
558 | STACK_OF(X509_EXTENSION) *exts; | |
559 | STACK_OF(OPENSSL_STRING) *ret; | |
560 | ||
561 | exts = X509_REQ_get_extensions(x); | |
562 | gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL); | |
563 | ret = get_email(X509_REQ_get_subject_name(x), gens); | |
564 | sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free); | |
565 | sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free); | |
566 | return ret; | |
a91dedca DSH |
567 | } |
568 | ||
0f113f3e MC |
569 | static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, |
570 | GENERAL_NAMES *gens) | |
a91dedca | 571 | { |
0f113f3e MC |
572 | STACK_OF(OPENSSL_STRING) *ret = NULL; |
573 | X509_NAME_ENTRY *ne; | |
574 | ASN1_IA5STRING *email; | |
575 | GENERAL_NAME *gen; | |
576 | int i; | |
577 | /* Now add any email address(es) to STACK */ | |
578 | i = -1; | |
579 | /* First supplied X509_NAME */ | |
580 | while ((i = X509_NAME_get_index_by_NID(name, | |
581 | NID_pkcs9_emailAddress, i)) >= 0) { | |
582 | ne = X509_NAME_get_entry(name, i); | |
583 | email = X509_NAME_ENTRY_get_data(ne); | |
584 | if (!append_ia5(&ret, email)) | |
585 | return NULL; | |
586 | } | |
587 | for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) { | |
588 | gen = sk_GENERAL_NAME_value(gens, i); | |
589 | if (gen->type != GEN_EMAIL) | |
590 | continue; | |
591 | if (!append_ia5(&ret, gen->d.ia5)) | |
592 | return NULL; | |
593 | } | |
594 | return ret; | |
a91dedca DSH |
595 | } |
596 | ||
c869da88 | 597 | static void str_free(OPENSSL_STRING str) |
a91dedca | 598 | { |
0f113f3e | 599 | OPENSSL_free(str); |
a91dedca DSH |
600 | } |
601 | ||
c869da88 | 602 | static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email) |
a91dedca | 603 | { |
0f113f3e MC |
604 | char *emtmp; |
605 | /* First some sanity checks */ | |
606 | if (email->type != V_ASN1_IA5STRING) | |
607 | return 1; | |
608 | if (!email->data || !email->length) | |
609 | return 1; | |
610 | if (!*sk) | |
611 | *sk = sk_OPENSSL_STRING_new(sk_strcmp); | |
612 | if (!*sk) | |
613 | return 0; | |
614 | /* Don't add duplicates */ | |
615 | if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1) | |
616 | return 1; | |
617 | emtmp = BUF_strdup((char *)email->data); | |
618 | if (!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) { | |
619 | X509_email_free(*sk); | |
620 | *sk = NULL; | |
621 | return 0; | |
622 | } | |
623 | return 1; | |
a91dedca DSH |
624 | } |
625 | ||
c869da88 | 626 | void X509_email_free(STACK_OF(OPENSSL_STRING) *sk) |
a91dedca | 627 | { |
0f113f3e | 628 | sk_OPENSSL_STRING_pop_free(sk, str_free); |
a91dedca | 629 | } |
4e5d3a7f | 630 | |
0f113f3e MC |
631 | typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len, |
632 | const unsigned char *subject, size_t subject_len, | |
633 | unsigned int flags); | |
d88926f1 | 634 | |
a09e4d24 VD |
635 | /* Skip pattern prefix to match "wildcard" subject */ |
636 | static void skip_prefix(const unsigned char **p, size_t *plen, | |
0f113f3e MC |
637 | const unsigned char *subject, size_t subject_len, |
638 | unsigned int flags) | |
639 | { | |
640 | const unsigned char *pattern = *p; | |
641 | size_t pattern_len = *plen; | |
642 | ||
643 | /* | |
644 | * If subject starts with a leading '.' followed by more octets, and | |
645 | * pattern is longer, compare just an equal-length suffix with the | |
646 | * full subject (starting at the '.'), provided the prefix contains | |
647 | * no NULs. | |
648 | */ | |
649 | if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0) | |
650 | return; | |
651 | ||
652 | while (pattern_len > subject_len && *pattern) { | |
653 | if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) && | |
654 | *pattern == '.') | |
655 | break; | |
656 | ++pattern; | |
657 | --pattern_len; | |
658 | } | |
659 | ||
660 | /* Skip if entire prefix acceptable */ | |
661 | if (pattern_len == subject_len) { | |
662 | *p = pattern; | |
663 | *plen = pattern_len; | |
664 | } | |
665 | } | |
a09e4d24 | 666 | |
d88926f1 DSH |
667 | /* Compare while ASCII ignoring case. */ |
668 | static int equal_nocase(const unsigned char *pattern, size_t pattern_len, | |
0f113f3e MC |
669 | const unsigned char *subject, size_t subject_len, |
670 | unsigned int flags) | |
671 | { | |
672 | skip_prefix(&pattern, &pattern_len, subject, subject_len, flags); | |
673 | if (pattern_len != subject_len) | |
674 | return 0; | |
675 | while (pattern_len) { | |
676 | unsigned char l = *pattern; | |
677 | unsigned char r = *subject; | |
678 | /* The pattern must not contain NUL characters. */ | |
679 | if (l == 0) | |
680 | return 0; | |
681 | if (l != r) { | |
682 | if ('A' <= l && l <= 'Z') | |
683 | l = (l - 'A') + 'a'; | |
684 | if ('A' <= r && r <= 'Z') | |
685 | r = (r - 'A') + 'a'; | |
686 | if (l != r) | |
687 | return 0; | |
688 | } | |
689 | ++pattern; | |
690 | ++subject; | |
691 | --pattern_len; | |
692 | } | |
693 | return 1; | |
694 | } | |
d88926f1 DSH |
695 | |
696 | /* Compare using memcmp. */ | |
697 | static int equal_case(const unsigned char *pattern, size_t pattern_len, | |
0f113f3e MC |
698 | const unsigned char *subject, size_t subject_len, |
699 | unsigned int flags) | |
d88926f1 | 700 | { |
0f113f3e MC |
701 | skip_prefix(&pattern, &pattern_len, subject, subject_len, flags); |
702 | if (pattern_len != subject_len) | |
703 | return 0; | |
704 | return !memcmp(pattern, subject, pattern_len); | |
d88926f1 DSH |
705 | } |
706 | ||
0f113f3e MC |
707 | /* |
708 | * RFC 5280, section 7.5, requires that only the domain is compared in a | |
709 | * case-insensitive manner. | |
710 | */ | |
d88926f1 | 711 | static int equal_email(const unsigned char *a, size_t a_len, |
0f113f3e MC |
712 | const unsigned char *b, size_t b_len, |
713 | unsigned int unused_flags) | |
714 | { | |
715 | size_t i = a_len; | |
716 | if (a_len != b_len) | |
717 | return 0; | |
718 | /* | |
719 | * We search backwards for the '@' character, so that we do not have to | |
720 | * deal with quoted local-parts. The domain part is compared in a | |
721 | * case-insensitive manner. | |
722 | */ | |
723 | while (i > 0) { | |
724 | --i; | |
725 | if (a[i] == '@' || b[i] == '@') { | |
726 | if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0)) | |
727 | return 0; | |
728 | break; | |
729 | } | |
730 | } | |
731 | if (i == 0) | |
732 | i = a_len; | |
733 | return equal_case(a, i, b, i, 0); | |
734 | } | |
735 | ||
736 | /* | |
737 | * Compare the prefix and suffix with the subject, and check that the | |
738 | * characters in-between are valid. | |
739 | */ | |
d88926f1 | 740 | static int wildcard_match(const unsigned char *prefix, size_t prefix_len, |
0f113f3e MC |
741 | const unsigned char *suffix, size_t suffix_len, |
742 | const unsigned char *subject, size_t subject_len, | |
743 | unsigned int flags) | |
744 | { | |
745 | const unsigned char *wildcard_start; | |
746 | const unsigned char *wildcard_end; | |
747 | const unsigned char *p; | |
748 | int allow_multi = 0; | |
749 | int allow_idna = 0; | |
750 | ||
751 | if (subject_len < prefix_len + suffix_len) | |
752 | return 0; | |
753 | if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags)) | |
754 | return 0; | |
755 | wildcard_start = subject + prefix_len; | |
756 | wildcard_end = subject + (subject_len - suffix_len); | |
757 | if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags)) | |
758 | return 0; | |
759 | /* | |
760 | * If the wildcard makes up the entire first label, it must match at | |
761 | * least one character. | |
762 | */ | |
763 | if (prefix_len == 0 && *suffix == '.') { | |
764 | if (wildcard_start == wildcard_end) | |
765 | return 0; | |
766 | allow_idna = 1; | |
767 | if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS) | |
768 | allow_multi = 1; | |
769 | } | |
770 | /* IDNA labels cannot match partial wildcards */ | |
771 | if (!allow_idna && | |
772 | subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0) | |
773 | return 0; | |
774 | /* The wildcard may match a literal '*' */ | |
775 | if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*') | |
776 | return 1; | |
777 | /* | |
778 | * Check that the part matched by the wildcard contains only | |
779 | * permitted characters and only matches a single label unless | |
780 | * allow_multi is set. | |
781 | */ | |
782 | for (p = wildcard_start; p != wildcard_end; ++p) | |
783 | if (!(('0' <= *p && *p <= '9') || | |
784 | ('A' <= *p && *p <= 'Z') || | |
785 | ('a' <= *p && *p <= 'z') || | |
786 | *p == '-' || (allow_multi && *p == '.'))) | |
787 | return 0; | |
788 | return 1; | |
789 | } | |
790 | ||
791 | #define LABEL_START (1 << 0) | |
792 | #define LABEL_END (1 << 1) | |
793 | #define LABEL_HYPHEN (1 << 2) | |
794 | #define LABEL_IDNA (1 << 3) | |
d88926f1 | 795 | |
397a8e74 | 796 | static const unsigned char *valid_star(const unsigned char *p, size_t len, |
0f113f3e MC |
797 | unsigned int flags) |
798 | { | |
799 | const unsigned char *star = 0; | |
800 | size_t i; | |
801 | int state = LABEL_START; | |
802 | int dots = 0; | |
803 | for (i = 0; i < len; ++i) { | |
804 | /* | |
805 | * Locate first and only legal wildcard, either at the start | |
806 | * or end of a non-IDNA first and not final label. | |
807 | */ | |
808 | if (p[i] == '*') { | |
809 | int atstart = (state & LABEL_START); | |
810 | int atend = (i == len - 1 || p[i + i] == '.'); | |
811 | /*- | |
812 | * At most one wildcard per pattern. | |
813 | * No wildcards in IDNA labels. | |
814 | * No wildcards after the first label. | |
815 | */ | |
816 | if (star != NULL || (state & LABEL_IDNA) != 0 || dots) | |
817 | return NULL; | |
818 | /* Only full-label '*.example.com' wildcards? */ | |
819 | if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS) | |
820 | && (!atstart || !atend)) | |
821 | return NULL; | |
822 | /* No 'foo*bar' wildcards */ | |
823 | if (!atstart && !atend) | |
824 | return NULL; | |
825 | star = &p[i]; | |
826 | state &= ~LABEL_START; | |
827 | } else if (('a' <= p[i] && p[i] <= 'z') | |
828 | || ('A' <= p[i] && p[i] <= 'Z') | |
829 | || ('0' <= p[i] && p[i] <= '9')) { | |
830 | if ((state & LABEL_START) != 0 | |
831 | && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0) | |
832 | state |= LABEL_IDNA; | |
833 | state &= ~(LABEL_HYPHEN | LABEL_START); | |
834 | } else if (p[i] == '.') { | |
835 | if ((state & (LABEL_HYPHEN | LABEL_START)) != 0) | |
836 | return NULL; | |
837 | state = LABEL_START; | |
838 | ++dots; | |
839 | } else if (p[i] == '-') { | |
840 | if ((state & LABEL_HYPHEN) != 0) | |
841 | return NULL; | |
842 | state |= LABEL_HYPHEN; | |
843 | } else | |
844 | return NULL; | |
845 | } | |
846 | ||
847 | /* | |
848 | * The final label must not end in a hyphen or ".", and | |
849 | * there must be at least two dots after the star. | |
850 | */ | |
851 | if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2) | |
852 | return NULL; | |
853 | return star; | |
854 | } | |
d88926f1 DSH |
855 | |
856 | /* Compare using wildcards. */ | |
857 | static int equal_wildcard(const unsigned char *pattern, size_t pattern_len, | |
0f113f3e MC |
858 | const unsigned char *subject, size_t subject_len, |
859 | unsigned int flags) | |
860 | { | |
861 | const unsigned char *star = NULL; | |
862 | ||
863 | /* | |
864 | * Subject names starting with '.' can only match a wildcard pattern | |
865 | * via a subject sub-domain pattern suffix match. | |
866 | */ | |
867 | if (!(subject_len > 1 && subject[0] == '.')) | |
868 | star = valid_star(pattern, pattern_len, flags); | |
869 | if (star == NULL) | |
870 | return equal_nocase(pattern, pattern_len, | |
871 | subject, subject_len, flags); | |
872 | return wildcard_match(pattern, star - pattern, | |
873 | star + 1, (pattern + pattern_len) - star - 1, | |
874 | subject, subject_len, flags); | |
875 | } | |
876 | ||
877 | /* | |
878 | * Compare an ASN1_STRING to a supplied string. If they match return 1. If | |
879 | * cmp_type > 0 only compare if string matches the type, otherwise convert it | |
880 | * to UTF8. | |
a70da5b3 DSH |
881 | */ |
882 | ||
d88926f1 | 883 | static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal, |
0f113f3e MC |
884 | unsigned int flags, const char *b, size_t blen, |
885 | char **peername) | |
886 | { | |
887 | int rv = 0; | |
888 | ||
889 | if (!a->data || !a->length) | |
890 | return 0; | |
891 | if (cmp_type > 0) { | |
892 | if (cmp_type != a->type) | |
893 | return 0; | |
894 | if (cmp_type == V_ASN1_IA5STRING) | |
895 | rv = equal(a->data, a->length, (unsigned char *)b, blen, flags); | |
896 | else if (a->length == (int)blen && !memcmp(a->data, b, blen)) | |
897 | rv = 1; | |
898 | if (rv > 0 && peername) | |
899 | *peername = BUF_strndup((char *)a->data, a->length); | |
900 | } else { | |
901 | int astrlen; | |
902 | unsigned char *astr; | |
903 | astrlen = ASN1_STRING_to_UTF8(&astr, a); | |
904 | if (astrlen < 0) | |
905 | return -1; | |
906 | rv = equal(astr, astrlen, (unsigned char *)b, blen, flags); | |
907 | if (rv > 0 && peername) | |
908 | *peername = BUF_strndup((char *)astr, astrlen); | |
909 | OPENSSL_free(astr); | |
910 | } | |
911 | return rv; | |
912 | } | |
a70da5b3 | 913 | |
297c67fc | 914 | static int do_x509_check(X509 *x, const char *chk, size_t chklen, |
0f113f3e MC |
915 | unsigned int flags, int check_type, char **peername) |
916 | { | |
917 | GENERAL_NAMES *gens = NULL; | |
918 | X509_NAME *name = NULL; | |
919 | int i; | |
920 | int cnid; | |
921 | int alt_type; | |
922 | int san_present = 0; | |
923 | int rv = 0; | |
924 | equal_fn equal; | |
925 | ||
926 | /* See below, this flag is internal-only */ | |
927 | flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS; | |
928 | if (check_type == GEN_EMAIL) { | |
929 | cnid = NID_pkcs9_emailAddress; | |
930 | alt_type = V_ASN1_IA5STRING; | |
931 | equal = equal_email; | |
932 | } else if (check_type == GEN_DNS) { | |
933 | cnid = NID_commonName; | |
934 | /* Implicit client-side DNS sub-domain pattern */ | |
935 | if (chklen > 1 && chk[0] == '.') | |
936 | flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS; | |
937 | alt_type = V_ASN1_IA5STRING; | |
938 | if (flags & X509_CHECK_FLAG_NO_WILDCARDS) | |
939 | equal = equal_nocase; | |
940 | else | |
941 | equal = equal_wildcard; | |
942 | } else { | |
943 | cnid = 0; | |
944 | alt_type = V_ASN1_OCTET_STRING; | |
945 | equal = equal_case; | |
946 | } | |
947 | ||
948 | if (chklen == 0) | |
949 | chklen = strlen(chk); | |
950 | ||
951 | gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL); | |
952 | if (gens) { | |
953 | for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) { | |
954 | GENERAL_NAME *gen; | |
955 | ASN1_STRING *cstr; | |
956 | gen = sk_GENERAL_NAME_value(gens, i); | |
957 | if (gen->type != check_type) | |
958 | continue; | |
959 | san_present = 1; | |
960 | if (check_type == GEN_EMAIL) | |
961 | cstr = gen->d.rfc822Name; | |
962 | else if (check_type == GEN_DNS) | |
963 | cstr = gen->d.dNSName; | |
964 | else | |
965 | cstr = gen->d.iPAddress; | |
966 | /* Positive on success, negative on error! */ | |
967 | if ((rv = do_check_string(cstr, alt_type, equal, flags, | |
968 | chk, chklen, peername)) != 0) | |
969 | break; | |
970 | } | |
971 | GENERAL_NAMES_free(gens); | |
972 | if (rv != 0) | |
973 | return rv; | |
974 | if (!cnid | |
975 | || (san_present | |
976 | && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))) | |
977 | return 0; | |
978 | } | |
979 | i = -1; | |
980 | name = X509_get_subject_name(x); | |
981 | while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) { | |
982 | X509_NAME_ENTRY *ne; | |
983 | ASN1_STRING *str; | |
984 | ne = X509_NAME_get_entry(name, i); | |
985 | str = X509_NAME_ENTRY_get_data(ne); | |
986 | /* Positive on success, negative on error! */ | |
987 | if ((rv = do_check_string(str, -1, equal, flags, | |
988 | chk, chklen, peername)) != 0) | |
989 | return rv; | |
990 | } | |
991 | return 0; | |
992 | } | |
a70da5b3 | 993 | |
297c67fc | 994 | int X509_check_host(X509 *x, const char *chk, size_t chklen, |
0f113f3e MC |
995 | unsigned int flags, char **peername) |
996 | { | |
997 | if (chk == NULL) | |
998 | return -2; | |
999 | /* | |
1000 | * Embedded NULs are disallowed, except as the last character of a | |
1001 | * string of length 2 or more (tolerate caller including terminating | |
1002 | * NUL in string length). | |
1003 | */ | |
1004 | if (chklen == 0) | |
1005 | chklen = strlen(chk); | |
1006 | else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen)) | |
1007 | return -2; | |
1008 | if (chklen > 1 && chk[chklen - 1] == '\0') | |
1009 | --chklen; | |
1010 | return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername); | |
1011 | } | |
a70da5b3 | 1012 | |
297c67fc | 1013 | int X509_check_email(X509 *x, const char *chk, size_t chklen, |
0f113f3e MC |
1014 | unsigned int flags) |
1015 | { | |
1016 | if (chk == NULL) | |
1017 | return -2; | |
1018 | /* | |
1019 | * Embedded NULs are disallowed, except as the last character of a | |
1020 | * string of length 2 or more (tolerate caller including terminating | |
1021 | * NUL in string length). | |
1022 | */ | |
1023 | if (chklen == 0) | |
1024 | chklen = strlen((char *)chk); | |
1025 | else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen)) | |
1026 | return -2; | |
1027 | if (chklen > 1 && chk[chklen - 1] == '\0') | |
1028 | --chklen; | |
1029 | return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL); | |
1030 | } | |
a70da5b3 DSH |
1031 | |
1032 | int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen, | |
0f113f3e MC |
1033 | unsigned int flags) |
1034 | { | |
1035 | if (chk == NULL) | |
1036 | return -2; | |
1037 | return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL); | |
1038 | } | |
a70da5b3 DSH |
1039 | |
1040 | int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags) | |
0f113f3e MC |
1041 | { |
1042 | unsigned char ipout[16]; | |
1043 | size_t iplen; | |
1044 | ||
1045 | if (ipasc == NULL) | |
1046 | return -2; | |
1047 | iplen = (size_t)a2i_ipadd(ipout, ipasc); | |
1048 | if (iplen == 0) | |
1049 | return -2; | |
1050 | return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL); | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible | |
1055 | * with RFC3280. | |
4e5d3a7f DSH |
1056 | */ |
1057 | ||
1058 | ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc) | |
0f113f3e MC |
1059 | { |
1060 | unsigned char ipout[16]; | |
1061 | ASN1_OCTET_STRING *ret; | |
1062 | int iplen; | |
4e5d3a7f | 1063 | |
0f113f3e | 1064 | /* If string contains a ':' assume IPv6 */ |
4e5d3a7f | 1065 | |
0f113f3e | 1066 | iplen = a2i_ipadd(ipout, ipasc); |
520b76ff | 1067 | |
0f113f3e MC |
1068 | if (!iplen) |
1069 | return NULL; | |
4e5d3a7f | 1070 | |
0f113f3e MC |
1071 | ret = ASN1_OCTET_STRING_new(); |
1072 | if (!ret) | |
1073 | return NULL; | |
1074 | if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) { | |
1075 | ASN1_OCTET_STRING_free(ret); | |
1076 | return NULL; | |
1077 | } | |
1078 | return ret; | |
1079 | } | |
4e5d3a7f | 1080 | |
520b76ff | 1081 | ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc) |
0f113f3e MC |
1082 | { |
1083 | ASN1_OCTET_STRING *ret = NULL; | |
1084 | unsigned char ipout[32]; | |
1085 | char *iptmp = NULL, *p; | |
1086 | int iplen1, iplen2; | |
1087 | p = strchr(ipasc, '/'); | |
1088 | if (!p) | |
1089 | return NULL; | |
1090 | iptmp = BUF_strdup(ipasc); | |
1091 | if (!iptmp) | |
1092 | return NULL; | |
1093 | p = iptmp + (p - ipasc); | |
1094 | *p++ = 0; | |
1095 | ||
1096 | iplen1 = a2i_ipadd(ipout, iptmp); | |
1097 | ||
1098 | if (!iplen1) | |
1099 | goto err; | |
1100 | ||
1101 | iplen2 = a2i_ipadd(ipout + iplen1, p); | |
1102 | ||
1103 | OPENSSL_free(iptmp); | |
1104 | iptmp = NULL; | |
1105 | ||
1106 | if (!iplen2 || (iplen1 != iplen2)) | |
1107 | goto err; | |
1108 | ||
1109 | ret = ASN1_OCTET_STRING_new(); | |
1110 | if (!ret) | |
1111 | goto err; | |
1112 | if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2)) | |
1113 | goto err; | |
1114 | ||
1115 | return ret; | |
1116 | ||
1117 | err: | |
1118 | if (iptmp) | |
1119 | OPENSSL_free(iptmp); | |
1120 | if (ret) | |
1121 | ASN1_OCTET_STRING_free(ret); | |
1122 | return NULL; | |
1123 | } | |
520b76ff | 1124 | |
96ea4ae9 | 1125 | int a2i_ipadd(unsigned char *ipout, const char *ipasc) |
0f113f3e MC |
1126 | { |
1127 | /* If string contains a ':' assume IPv6 */ | |
1128 | ||
1129 | if (strchr(ipasc, ':')) { | |
1130 | if (!ipv6_from_asc(ipout, ipasc)) | |
1131 | return 0; | |
1132 | return 16; | |
1133 | } else { | |
1134 | if (!ipv4_from_asc(ipout, ipasc)) | |
1135 | return 0; | |
1136 | return 4; | |
1137 | } | |
1138 | } | |
520b76ff | 1139 | |
4e5d3a7f | 1140 | static int ipv4_from_asc(unsigned char *v4, const char *in) |
0f113f3e MC |
1141 | { |
1142 | int a0, a1, a2, a3; | |
1143 | if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4) | |
1144 | return 0; | |
1145 | if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255) | |
1146 | || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255)) | |
1147 | return 0; | |
1148 | v4[0] = a0; | |
1149 | v4[1] = a1; | |
1150 | v4[2] = a2; | |
1151 | v4[3] = a3; | |
1152 | return 1; | |
1153 | } | |
4e5d3a7f DSH |
1154 | |
1155 | typedef struct { | |
0f113f3e MC |
1156 | /* Temporary store for IPV6 output */ |
1157 | unsigned char tmp[16]; | |
1158 | /* Total number of bytes in tmp */ | |
1159 | int total; | |
1160 | /* The position of a zero (corresponding to '::') */ | |
1161 | int zero_pos; | |
1162 | /* Number of zeroes */ | |
1163 | int zero_cnt; | |
1164 | } IPV6_STAT; | |
4e5d3a7f DSH |
1165 | |
1166 | static int ipv6_from_asc(unsigned char *v6, const char *in) | |
0f113f3e MC |
1167 | { |
1168 | IPV6_STAT v6stat; | |
1169 | v6stat.total = 0; | |
1170 | v6stat.zero_pos = -1; | |
1171 | v6stat.zero_cnt = 0; | |
1172 | /* | |
1173 | * Treat the IPv6 representation as a list of values separated by ':'. | |
1174 | * The presence of a '::' will parse as one, two or three zero length | |
1175 | * elements. | |
1176 | */ | |
1177 | if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat)) | |
1178 | return 0; | |
1179 | ||
1180 | /* Now for some sanity checks */ | |
1181 | ||
1182 | if (v6stat.zero_pos == -1) { | |
1183 | /* If no '::' must have exactly 16 bytes */ | |
1184 | if (v6stat.total != 16) | |
1185 | return 0; | |
1186 | } else { | |
1187 | /* If '::' must have less than 16 bytes */ | |
1188 | if (v6stat.total == 16) | |
1189 | return 0; | |
1190 | /* More than three zeroes is an error */ | |
1191 | if (v6stat.zero_cnt > 3) | |
1192 | return 0; | |
1193 | /* Can only have three zeroes if nothing else present */ | |
1194 | else if (v6stat.zero_cnt == 3) { | |
1195 | if (v6stat.total > 0) | |
1196 | return 0; | |
1197 | } | |
1198 | /* Can only have two zeroes if at start or end */ | |
1199 | else if (v6stat.zero_cnt == 2) { | |
1200 | if ((v6stat.zero_pos != 0) | |
1201 | && (v6stat.zero_pos != v6stat.total)) | |
1202 | return 0; | |
1203 | } else | |
1204 | /* Can only have one zero if *not* start or end */ | |
1205 | { | |
1206 | if ((v6stat.zero_pos == 0) | |
1207 | || (v6stat.zero_pos == v6stat.total)) | |
1208 | return 0; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /* Format result */ | |
1213 | ||
1214 | if (v6stat.zero_pos >= 0) { | |
1215 | /* Copy initial part */ | |
1216 | memcpy(v6, v6stat.tmp, v6stat.zero_pos); | |
1217 | /* Zero middle */ | |
1218 | memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total); | |
1219 | /* Copy final part */ | |
1220 | if (v6stat.total != v6stat.zero_pos) | |
1221 | memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total, | |
1222 | v6stat.tmp + v6stat.zero_pos, | |
1223 | v6stat.total - v6stat.zero_pos); | |
1224 | } else | |
1225 | memcpy(v6, v6stat.tmp, 16); | |
1226 | ||
1227 | return 1; | |
1228 | } | |
4e5d3a7f DSH |
1229 | |
1230 | static int ipv6_cb(const char *elem, int len, void *usr) | |
0f113f3e MC |
1231 | { |
1232 | IPV6_STAT *s = usr; | |
1233 | /* Error if 16 bytes written */ | |
1234 | if (s->total == 16) | |
1235 | return 0; | |
1236 | if (len == 0) { | |
1237 | /* Zero length element, corresponds to '::' */ | |
1238 | if (s->zero_pos == -1) | |
1239 | s->zero_pos = s->total; | |
1240 | /* If we've already got a :: its an error */ | |
1241 | else if (s->zero_pos != s->total) | |
1242 | return 0; | |
1243 | s->zero_cnt++; | |
1244 | } else { | |
1245 | /* If more than 4 characters could be final a.b.c.d form */ | |
1246 | if (len > 4) { | |
1247 | /* Need at least 4 bytes left */ | |
1248 | if (s->total > 12) | |
1249 | return 0; | |
1250 | /* Must be end of string */ | |
1251 | if (elem[len]) | |
1252 | return 0; | |
1253 | if (!ipv4_from_asc(s->tmp + s->total, elem)) | |
1254 | return 0; | |
1255 | s->total += 4; | |
1256 | } else { | |
1257 | if (!ipv6_hex(s->tmp + s->total, elem, len)) | |
1258 | return 0; | |
1259 | s->total += 2; | |
1260 | } | |
1261 | } | |
1262 | return 1; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Convert a string of up to 4 hex digits into the corresponding IPv6 form. | |
4e5d3a7f DSH |
1267 | */ |
1268 | ||
1269 | static int ipv6_hex(unsigned char *out, const char *in, int inlen) | |
0f113f3e MC |
1270 | { |
1271 | unsigned char c; | |
1272 | unsigned int num = 0; | |
1273 | if (inlen > 4) | |
1274 | return 0; | |
1275 | while (inlen--) { | |
1276 | c = *in++; | |
1277 | num <<= 4; | |
1278 | if ((c >= '0') && (c <= '9')) | |
1279 | num |= c - '0'; | |
1280 | else if ((c >= 'A') && (c <= 'F')) | |
1281 | num |= c - 'A' + 10; | |
1282 | else if ((c >= 'a') && (c <= 'f')) | |
1283 | num |= c - 'a' + 10; | |
1284 | else | |
1285 | return 0; | |
1286 | } | |
1287 | out[0] = num >> 8; | |
1288 | out[1] = num & 0xff; | |
1289 | return 1; | |
1290 | } | |
f0dc08e6 | 1291 | |
a7b1eed5 | 1292 | int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk, |
0f113f3e MC |
1293 | unsigned long chtype) |
1294 | { | |
1295 | CONF_VALUE *v; | |
1296 | int i, mval; | |
1297 | char *p, *type; | |
1298 | if (!nm) | |
1299 | return 0; | |
1300 | ||
1301 | for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) { | |
1302 | v = sk_CONF_VALUE_value(dn_sk, i); | |
1303 | type = v->name; | |
1304 | /* | |
1305 | * Skip past any leading X. X: X, etc to allow for multiple instances | |
1306 | */ | |
1307 | for (p = type; *p; p++) | |
f0dc08e6 | 1308 | #ifndef CHARSET_EBCDIC |
0f113f3e | 1309 | if ((*p == ':') || (*p == ',') || (*p == '.')) |
f0dc08e6 | 1310 | #else |
0f113f3e MC |
1311 | if ((*p == os_toascii[':']) || (*p == os_toascii[',']) |
1312 | || (*p == os_toascii['.'])) | |
f0dc08e6 | 1313 | #endif |
0f113f3e MC |
1314 | { |
1315 | p++; | |
1316 | if (*p) | |
1317 | type = p; | |
1318 | break; | |
1319 | } | |
1a15c899 | 1320 | #ifndef CHARSET_EBCDIC |
0f113f3e | 1321 | if (*type == '+') |
1a15c899 | 1322 | #else |
0f113f3e | 1323 | if (*type == os_toascii['+']) |
1a15c899 | 1324 | #endif |
0f113f3e MC |
1325 | { |
1326 | mval = -1; | |
1327 | type++; | |
1328 | } else | |
1329 | mval = 0; | |
1330 | if (!X509_NAME_add_entry_by_txt(nm, type, chtype, | |
1331 | (unsigned char *)v->value, -1, -1, | |
1332 | mval)) | |
1333 | return 0; | |
1334 | ||
1335 | } | |
1336 | return 1; | |
1337 | } |