File: | src/lib/libcrypto/asn1/asn_mime.c |
Warning: | line 617, column 2 Value stored to 'state' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | /* $OpenBSD: asn_mime.c,v 1.29 2021/12/25 13:17:48 jsing Exp $ */ |
2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
3 | * project. |
4 | */ |
5 | /* ==================================================================== |
6 | * Copyright (c) 1999-2008 The OpenSSL Project. All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions |
10 | * are met: |
11 | * |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in |
17 | * the documentation and/or other materials provided with the |
18 | * distribution. |
19 | * |
20 | * 3. All advertising materials mentioning features or use of this |
21 | * software must display the following acknowledgment: |
22 | * "This product includes software developed by the OpenSSL Project |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
24 | * |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
26 | * endorse or promote products derived from this software without |
27 | * prior written permission. For written permission, please contact |
28 | * licensing@OpenSSL.org. |
29 | * |
30 | * 5. Products derived from this software may not be called "OpenSSL" |
31 | * nor may "OpenSSL" appear in their names without prior written |
32 | * permission of the OpenSSL Project. |
33 | * |
34 | * 6. Redistributions of any form whatsoever must retain the following |
35 | * acknowledgment: |
36 | * "This product includes software developed by the OpenSSL Project |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
38 | * |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
51 | * ==================================================================== |
52 | * |
53 | */ |
54 | |
55 | #include <ctype.h> |
56 | #include <stdio.h> |
57 | #include <stdlib.h> |
58 | #include <string.h> |
59 | |
60 | #include <openssl/asn1.h> |
61 | #include <openssl/asn1t.h> |
62 | #include <openssl/err.h> |
63 | #include <openssl/x509.h> |
64 | |
65 | #include "asn1_locl.h" |
66 | #include "evp_locl.h" |
67 | |
68 | /* Generalised MIME like utilities for streaming ASN1. Although many |
69 | * have a PKCS7/CMS like flavour others are more general purpose. |
70 | */ |
71 | |
72 | /* MIME format structures |
73 | * Note that all are translated to lower case apart from |
74 | * parameter values. Quotes are stripped off |
75 | */ |
76 | |
77 | typedef struct { |
78 | char *param_name; /* Param name e.g. "micalg" */ |
79 | char *param_value; /* Param value e.g. "sha1" */ |
80 | } MIME_PARAM; |
81 | |
82 | DECLARE_STACK_OF(MIME_PARAM)struct stack_st_MIME_PARAM { _STACK stack; }; |
83 | |
84 | typedef struct { |
85 | char *name; /* Name of line e.g. "content-type" */ |
86 | char *value; /* Value of line e.g. "text/plain" */ |
87 | STACK_OF(MIME_PARAM)struct stack_st_MIME_PARAM *params; /* Zero or more parameters */ |
88 | } MIME_HEADER; |
89 | |
90 | DECLARE_STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER { _STACK stack; }; |
91 | |
92 | static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags, |
93 | const ASN1_ITEM *it); |
94 | static char * strip_ends(char *name); |
95 | static char * strip_start(char *name); |
96 | static char * strip_end(char *name); |
97 | static MIME_HEADER *mime_hdr_new(char *name, char *value); |
98 | static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value); |
99 | static STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER *mime_parse_hdr(BIO *bio); |
100 | static int mime_hdr_cmp(const MIME_HEADER * const *a, |
101 | const MIME_HEADER * const *b); |
102 | static int mime_param_cmp(const MIME_PARAM * const *a, |
103 | const MIME_PARAM * const *b); |
104 | static void mime_param_free(MIME_PARAM *param); |
105 | static int mime_bound_check(char *line, int linelen, char *bound, int blen); |
106 | static int multi_split(BIO *bio, char *bound, STACK_OF(BIO)struct stack_st_BIO **ret); |
107 | static int strip_eol(char *linebuf, int *plen); |
108 | static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER *hdrs, char *name); |
109 | static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name); |
110 | static void mime_hdr_free(MIME_HEADER *hdr); |
111 | |
112 | #define MAX_SMLEN1024 1024 |
113 | #define mime_debug(x) /* x */ |
114 | |
115 | /* Output an ASN1 structure in BER format streaming if necessary */ |
116 | |
117 | int |
118 | i2d_ASN1_bio_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags, |
119 | const ASN1_ITEM *it) |
120 | { |
121 | /* If streaming create stream BIO and copy all content through it */ |
122 | if (flags & SMIME_STREAM0x1000) { |
123 | BIO *bio, *tbio; |
124 | bio = BIO_new_NDEF(out, val, it); |
125 | if (!bio) { |
126 | ASN1error(ERR_R_MALLOC_FAILURE)ERR_put_error(13,(0xfff),((1|64)),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,126); |
127 | return 0; |
128 | } |
129 | SMIME_crlf_copy(in, bio, flags); |
130 | (void)BIO_flush(bio)(int)BIO_ctrl(bio,11,0,((void*)0)); |
131 | /* Free up successive BIOs until we hit the old output BIO */ |
132 | do { |
133 | tbio = BIO_pop(bio); |
134 | BIO_free(bio); |
135 | bio = tbio; |
136 | } while (bio != out); |
137 | } |
138 | /* else just write out ASN1 structure which will have all content |
139 | * stored internally |
140 | */ |
141 | else |
142 | ASN1_item_i2d_bio(it, out, val); |
143 | return 1; |
144 | } |
145 | |
146 | /* Base 64 read and write of ASN1 structure */ |
147 | |
148 | static int |
149 | B64_write_ASN1(BIO *out, ASN1_VALUE *val, BIO *in, int flags, |
150 | const ASN1_ITEM *it) |
151 | { |
152 | BIO *b64; |
153 | int r; |
154 | |
155 | b64 = BIO_new(BIO_f_base64()); |
156 | if (!b64) { |
157 | ASN1error(ERR_R_MALLOC_FAILURE)ERR_put_error(13,(0xfff),((1|64)),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,157); |
158 | return 0; |
159 | } |
160 | /* prepend the b64 BIO so all data is base64 encoded. |
161 | */ |
162 | out = BIO_push(b64, out); |
163 | r = i2d_ASN1_bio_stream(out, val, in, flags, it); |
164 | (void)BIO_flush(out)(int)BIO_ctrl(out,11,0,((void*)0)); |
165 | BIO_pop(out); |
166 | BIO_free(b64); |
167 | return r; |
168 | } |
169 | |
170 | /* Streaming ASN1 PEM write */ |
171 | |
172 | int |
173 | PEM_write_bio_ASN1_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags, |
174 | const char *hdr, const ASN1_ITEM *it) |
175 | { |
176 | int r; |
177 | |
178 | BIO_printf(out, "-----BEGIN %s-----\n", hdr); |
179 | r = B64_write_ASN1(out, val, in, flags, it); |
180 | BIO_printf(out, "-----END %s-----\n", hdr); |
181 | return r; |
182 | } |
183 | |
184 | static ASN1_VALUE * |
185 | b64_read_asn1(BIO *bio, const ASN1_ITEM *it) |
186 | { |
187 | BIO *b64; |
188 | ASN1_VALUE *val; |
189 | if (!(b64 = BIO_new(BIO_f_base64()))) { |
190 | ASN1error(ERR_R_MALLOC_FAILURE)ERR_put_error(13,(0xfff),((1|64)),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,190); |
191 | return 0; |
192 | } |
193 | bio = BIO_push(b64, bio); |
194 | val = ASN1_item_d2i_bio(it, bio, NULL((void*)0)); |
195 | if (!val) |
196 | ASN1error(ASN1_R_DECODE_ERROR)ERR_put_error(13,(0xfff),(110),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,196); |
197 | (void)BIO_flush(bio)(int)BIO_ctrl(bio,11,0,((void*)0)); |
198 | bio = BIO_pop(bio); |
199 | BIO_free(b64); |
200 | return val; |
201 | } |
202 | |
203 | /* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */ |
204 | |
205 | static int |
206 | asn1_write_micalg(BIO *out, STACK_OF(X509_ALGOR)struct stack_st_X509_ALGOR *mdalgs) |
207 | { |
208 | const EVP_MD *md; |
209 | int i, have_unknown = 0, write_comma, ret = 0, md_nid; |
210 | |
211 | have_unknown = 0; |
212 | write_comma = 0; |
213 | for (i = 0; i < sk_X509_ALGOR_num(mdalgs)sk_num(((_STACK*) (1 ? (mdalgs) : (struct stack_st_X509_ALGOR *)0))); i++) { |
214 | if (write_comma) |
215 | BIO_write(out, ",", 1); |
216 | write_comma = 1; |
217 | md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)((X509_ALGOR *)sk_value(((_STACK*) (1 ? (mdalgs) : (struct stack_st_X509_ALGOR *)0)), (i)))->algorithm); |
218 | md = EVP_get_digestbynid(md_nid)EVP_get_digestbyname(OBJ_nid2sn(md_nid)); |
219 | if (md && md->md_ctrl) { |
220 | int rv; |
221 | char *micstr; |
222 | rv = md->md_ctrl(NULL((void*)0), EVP_MD_CTRL_MICALG0x2, 0, &micstr); |
223 | if (rv > 0) { |
224 | BIO_puts(out, micstr); |
225 | free(micstr); |
226 | continue; |
227 | } |
228 | if (rv != -2) |
229 | goto err; |
230 | } |
231 | switch (md_nid) { |
232 | case NID_sha164: |
233 | BIO_puts(out, "sha1"); |
234 | break; |
235 | |
236 | case NID_md54: |
237 | BIO_puts(out, "md5"); |
238 | break; |
239 | |
240 | case NID_sha256672: |
241 | BIO_puts(out, "sha-256"); |
242 | break; |
243 | |
244 | case NID_sha384673: |
245 | BIO_puts(out, "sha-384"); |
246 | break; |
247 | |
248 | case NID_sha512674: |
249 | BIO_puts(out, "sha-512"); |
250 | break; |
251 | |
252 | case NID_id_GostR3411_94809: |
253 | BIO_puts(out, "gostr3411-94"); |
254 | goto err; |
255 | break; |
256 | |
257 | default: |
258 | if (have_unknown) |
259 | write_comma = 0; |
260 | else { |
261 | BIO_puts(out, "unknown"); |
262 | have_unknown = 1; |
263 | } |
264 | break; |
265 | |
266 | } |
267 | } |
268 | |
269 | ret = 1; |
270 | |
271 | err: |
272 | return ret; |
273 | } |
274 | |
275 | /* SMIME sender */ |
276 | |
277 | int |
278 | SMIME_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags, |
279 | int ctype_nid, int econt_nid, STACK_OF(X509_ALGOR)struct stack_st_X509_ALGOR *mdalgs, |
280 | const ASN1_ITEM *it) |
281 | { |
282 | char bound[33], c; |
283 | int i; |
284 | const char *mime_prefix, *mime_eol, *cname = "smime.p7m"; |
285 | const char *msg_type = NULL((void*)0); |
286 | |
287 | if (flags & SMIME_OLDMIME0x400) |
288 | mime_prefix = "application/x-pkcs7-"; |
289 | else |
290 | mime_prefix = "application/pkcs7-"; |
291 | |
292 | if (flags & SMIME_CRLFEOL0x800) |
293 | mime_eol = "\r\n"; |
294 | else |
295 | mime_eol = "\n"; |
296 | if ((flags & SMIME_DETACHED0x40) && data) { |
297 | /* We want multipart/signed */ |
298 | /* Generate a random boundary */ |
299 | arc4random_buf(bound, 32); |
300 | for (i = 0; i < 32; i++) { |
301 | c = bound[i] & 0xf; |
302 | if (c < 10) |
303 | c += '0'; |
304 | else |
305 | c += 'A' - 10; |
306 | bound[i] = c; |
307 | } |
308 | bound[32] = 0; |
309 | BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol); |
310 | BIO_printf(bio, "Content-Type: multipart/signed;"); |
311 | BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix); |
312 | BIO_puts(bio, " micalg=\""); |
313 | asn1_write_micalg(bio, mdalgs); |
314 | BIO_printf(bio, "\"; boundary=\"----%s\"%s%s", |
315 | bound, mime_eol, mime_eol); |
316 | BIO_printf(bio, "This is an S/MIME signed message%s%s", |
317 | mime_eol, mime_eol); |
318 | /* Now write out the first part */ |
319 | BIO_printf(bio, "------%s%s", bound, mime_eol); |
320 | if (!asn1_output_data(bio, data, val, flags, it)) |
321 | return 0; |
322 | BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol); |
323 | |
324 | /* Headers for signature */ |
325 | |
326 | BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix); |
327 | BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol); |
328 | BIO_printf(bio, "Content-Transfer-Encoding: base64%s", |
329 | mime_eol); |
330 | BIO_printf(bio, "Content-Disposition: attachment;"); |
331 | BIO_printf(bio, " filename=\"smime.p7s\"%s%s", |
332 | mime_eol, mime_eol); |
333 | B64_write_ASN1(bio, val, NULL((void*)0), 0, it); |
334 | BIO_printf(bio, "%s------%s--%s%s", mime_eol, bound, |
335 | mime_eol, mime_eol); |
336 | return 1; |
337 | } |
338 | |
339 | /* Determine smime-type header */ |
340 | |
341 | if (ctype_nid == NID_pkcs7_enveloped23) |
342 | msg_type = "enveloped-data"; |
343 | else if (ctype_nid == NID_pkcs7_signed22) { |
344 | if (econt_nid == NID_id_smime_ct_receipt204) |
345 | msg_type = "signed-receipt"; |
346 | else if (sk_X509_ALGOR_num(mdalgs)sk_num(((_STACK*) (1 ? (mdalgs) : (struct stack_st_X509_ALGOR *)0))) >= 0) |
347 | msg_type = "signed-data"; |
348 | else |
349 | msg_type = "certs-only"; |
350 | } else if (ctype_nid == NID_id_smime_ct_compressedData786) { |
351 | msg_type = "compressed-data"; |
352 | cname = "smime.p7z"; |
353 | } |
354 | /* MIME headers */ |
355 | BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol); |
356 | BIO_printf(bio, "Content-Disposition: attachment;"); |
357 | BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol); |
358 | BIO_printf(bio, "Content-Type: %smime;", mime_prefix); |
359 | if (msg_type) |
360 | BIO_printf(bio, " smime-type=%s;", msg_type); |
361 | BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol); |
362 | BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s", |
363 | mime_eol, mime_eol); |
364 | if (!B64_write_ASN1(bio, val, data, flags, it)) |
365 | return 0; |
366 | BIO_printf(bio, "%s", mime_eol); |
367 | return 1; |
368 | } |
369 | |
370 | /* Handle output of ASN1 data */ |
371 | |
372 | |
373 | static int |
374 | asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags, |
375 | const ASN1_ITEM *it) |
376 | { |
377 | BIO *tmpbio; |
378 | const ASN1_AUX *aux = it->funcs; |
379 | ASN1_STREAM_ARG sarg; |
380 | int rv = 1; |
381 | |
382 | /* If data is not deteched or resigning then the output BIO is |
383 | * already set up to finalise when it is written through. |
384 | */ |
385 | if (!(flags & SMIME_DETACHED0x40) || (flags & PKCS7_REUSE_DIGEST0x8000)) { |
386 | SMIME_crlf_copy(data, out, flags); |
387 | return 1; |
388 | } |
389 | |
390 | if (!aux || !aux->asn1_cb) { |
391 | ASN1error(ASN1_R_STREAMING_NOT_SUPPORTED)ERR_put_error(13,(0xfff),(202),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,391); |
392 | return 0; |
393 | } |
394 | |
395 | sarg.out = out; |
396 | sarg.ndef_bio = NULL((void*)0); |
397 | sarg.boundary = NULL((void*)0); |
398 | |
399 | /* Let ASN1 code prepend any needed BIOs */ |
400 | |
401 | if (aux->asn1_cb(ASN1_OP_DETACHED_PRE12, &val, it, &sarg) <= 0) |
402 | return 0; |
403 | |
404 | /* Copy data across, passing through filter BIOs for processing */ |
405 | SMIME_crlf_copy(data, sarg.ndef_bio, flags); |
406 | |
407 | /* Finalize structure */ |
408 | if (aux->asn1_cb(ASN1_OP_DETACHED_POST13, &val, it, &sarg) <= 0) |
409 | rv = 0; |
410 | |
411 | /* Now remove any digests prepended to the BIO */ |
412 | |
413 | while (sarg.ndef_bio != out) { |
414 | tmpbio = BIO_pop(sarg.ndef_bio); |
415 | BIO_free(sarg.ndef_bio); |
416 | sarg.ndef_bio = tmpbio; |
417 | } |
418 | |
419 | return rv; |
420 | } |
421 | |
422 | /* SMIME reader: handle multipart/signed and opaque signing. |
423 | * in multipart case the content is placed in a memory BIO |
424 | * pointed to by "bcont". In opaque this is set to NULL |
425 | */ |
426 | |
427 | ASN1_VALUE * |
428 | SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it) |
429 | { |
430 | BIO *asnin; |
431 | STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER *headers = NULL((void*)0); |
432 | STACK_OF(BIO)struct stack_st_BIO *parts = NULL((void*)0); |
433 | MIME_HEADER *hdr; |
434 | MIME_PARAM *prm; |
435 | ASN1_VALUE *val; |
436 | int ret; |
437 | |
438 | if (bcont) |
439 | *bcont = NULL((void*)0); |
440 | |
441 | if (!(headers = mime_parse_hdr(bio))) { |
442 | ASN1error(ASN1_R_MIME_PARSE_ERROR)ERR_put_error(13,(0xfff),(207),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,442); |
443 | return NULL((void*)0); |
444 | } |
445 | |
446 | if (!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) { |
447 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
448 | ASN1error(ASN1_R_NO_CONTENT_TYPE)ERR_put_error(13,(0xfff),(209),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,448); |
449 | return NULL((void*)0); |
450 | } |
451 | |
452 | /* Handle multipart/signed */ |
453 | |
454 | if (!strcmp(hdr->value, "multipart/signed")) { |
455 | /* Split into two parts */ |
456 | prm = mime_param_find(hdr, "boundary"); |
457 | if (!prm || !prm->param_value) { |
458 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
459 | ASN1error(ASN1_R_NO_MULTIPART_BOUNDARY)ERR_put_error(13,(0xfff),(211),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,459); |
460 | return NULL((void*)0); |
461 | } |
462 | ret = multi_split(bio, prm->param_value, &parts); |
463 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
464 | if (!ret || (sk_BIO_num(parts)sk_num(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0))) != 2) ) { |
465 | ASN1error(ASN1_R_NO_MULTIPART_BODY_FAILURE)ERR_put_error(13,(0xfff),(210),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,465); |
466 | sk_BIO_pop_free(parts, BIO_vfree)sk_pop_free(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0 )), ((void (*)(void *)) ((1 ? (BIO_vfree) : (void (*)(BIO *)) 0)))); |
467 | return NULL((void*)0); |
468 | } |
469 | |
470 | /* Parse the signature piece */ |
471 | asnin = sk_BIO_value(parts, 1)((BIO *)sk_value(((_STACK*) (1 ? (parts) : (struct stack_st_BIO *)0)), (1))); |
472 | |
473 | if (!(headers = mime_parse_hdr(asnin))) { |
474 | ASN1error(ASN1_R_MIME_SIG_PARSE_ERROR)ERR_put_error(13,(0xfff),(208),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,474); |
475 | sk_BIO_pop_free(parts, BIO_vfree)sk_pop_free(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0 )), ((void (*)(void *)) ((1 ? (BIO_vfree) : (void (*)(BIO *)) 0)))); |
476 | return NULL((void*)0); |
477 | } |
478 | |
479 | /* Get content type */ |
480 | |
481 | if (!(hdr = mime_hdr_find(headers, "content-type")) || |
482 | !hdr->value) { |
483 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
484 | sk_BIO_pop_free(parts, BIO_vfree)sk_pop_free(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0 )), ((void (*)(void *)) ((1 ? (BIO_vfree) : (void (*)(BIO *)) 0)))); |
485 | ASN1error(ASN1_R_NO_SIG_CONTENT_TYPE)ERR_put_error(13,(0xfff),(212),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,485); |
486 | return NULL((void*)0); |
487 | } |
488 | |
489 | if (strcmp(hdr->value, "application/x-pkcs7-signature") && |
490 | strcmp(hdr->value, "application/pkcs7-signature")) { |
491 | ASN1error(ASN1_R_SIG_INVALID_MIME_TYPE)ERR_put_error(13,(0xfff),(213),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,491); |
492 | ERR_asprintf_error_data("type: %s", hdr->value); |
493 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
494 | sk_BIO_pop_free(parts, BIO_vfree)sk_pop_free(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0 )), ((void (*)(void *)) ((1 ? (BIO_vfree) : (void (*)(BIO *)) 0)))); |
495 | return NULL((void*)0); |
496 | } |
497 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
498 | /* Read in ASN1 */ |
499 | if (!(val = b64_read_asn1(asnin, it))) { |
500 | ASN1error(ASN1_R_ASN1_SIG_PARSE_ERROR)ERR_put_error(13,(0xfff),(204),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,500); |
501 | sk_BIO_pop_free(parts, BIO_vfree)sk_pop_free(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0 )), ((void (*)(void *)) ((1 ? (BIO_vfree) : (void (*)(BIO *)) 0)))); |
502 | return NULL((void*)0); |
503 | } |
504 | |
505 | if (bcont) { |
506 | *bcont = sk_BIO_value(parts, 0)((BIO *)sk_value(((_STACK*) (1 ? (parts) : (struct stack_st_BIO *)0)), (0))); |
507 | BIO_free(asnin); |
508 | sk_BIO_free(parts)sk_free(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0))); |
509 | } else sk_BIO_pop_free(parts, BIO_vfree)sk_pop_free(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0 )), ((void (*)(void *)) ((1 ? (BIO_vfree) : (void (*)(BIO *)) 0)))); |
510 | return val; |
511 | } |
512 | |
513 | /* OK, if not multipart/signed try opaque signature */ |
514 | |
515 | if (strcmp (hdr->value, "application/x-pkcs7-mime") && |
516 | strcmp (hdr->value, "application/pkcs7-mime")) { |
517 | ASN1error(ASN1_R_INVALID_MIME_TYPE)ERR_put_error(13,(0xfff),(205),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,517); |
518 | ERR_asprintf_error_data("type: %s", hdr->value); |
519 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
520 | return NULL((void*)0); |
521 | } |
522 | |
523 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
524 | |
525 | if (!(val = b64_read_asn1(bio, it))) { |
526 | ASN1error(ASN1_R_ASN1_PARSE_ERROR)ERR_put_error(13,(0xfff),(203),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,526); |
527 | return NULL((void*)0); |
528 | } |
529 | return val; |
530 | } |
531 | |
532 | /* Copy text from one BIO to another making the output CRLF at EOL */ |
533 | int |
534 | SMIME_crlf_copy(BIO *in, BIO *out, int flags) |
535 | { |
536 | BIO *bf; |
537 | char eol; |
538 | int len; |
539 | char linebuf[MAX_SMLEN1024]; |
540 | |
541 | /* Buffer output so we don't write one line at a time. This is |
542 | * useful when streaming as we don't end up with one OCTET STRING |
543 | * per line. |
544 | */ |
545 | bf = BIO_new(BIO_f_buffer()); |
546 | if (!bf) |
547 | return 0; |
548 | out = BIO_push(bf, out); |
549 | if (flags & SMIME_BINARY0x80) { |
550 | while ((len = BIO_read(in, linebuf, MAX_SMLEN1024)) > 0) |
551 | BIO_write(out, linebuf, len); |
552 | } else { |
553 | if (flags & SMIME_TEXT0x1) |
554 | BIO_printf(out, "Content-Type: text/plain\r\n\r\n"); |
555 | while ((len = BIO_gets(in, linebuf, MAX_SMLEN1024)) > 0) { |
556 | eol = strip_eol(linebuf, &len); |
557 | if (len) |
558 | BIO_write(out, linebuf, len); |
559 | if (eol) |
560 | BIO_write(out, "\r\n", 2); |
561 | } |
562 | } |
563 | (void)BIO_flush(out)(int)BIO_ctrl(out,11,0,((void*)0)); |
564 | BIO_pop(out); |
565 | BIO_free(bf); |
566 | return 1; |
567 | } |
568 | |
569 | /* Strip off headers if they are text/plain */ |
570 | int |
571 | SMIME_text(BIO *in, BIO *out) |
572 | { |
573 | char iobuf[4096]; |
574 | int len; |
575 | STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER *headers; |
576 | MIME_HEADER *hdr; |
577 | |
578 | if (!(headers = mime_parse_hdr(in))) { |
579 | ASN1error(ASN1_R_MIME_PARSE_ERROR)ERR_put_error(13,(0xfff),(207),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,579); |
580 | return 0; |
581 | } |
582 | if (!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) { |
583 | ASN1error(ASN1_R_MIME_NO_CONTENT_TYPE)ERR_put_error(13,(0xfff),(206),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,583); |
584 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
585 | return 0; |
586 | } |
587 | if (strcmp (hdr->value, "text/plain")) { |
588 | ASN1error(ASN1_R_INVALID_MIME_TYPE)ERR_put_error(13,(0xfff),(205),"/usr/src/lib/libcrypto/asn1/asn_mime.c" ,588); |
589 | ERR_asprintf_error_data("type: %s", hdr->value); |
590 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
591 | return 0; |
592 | } |
593 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
594 | while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0) |
595 | BIO_write(out, iobuf, len); |
596 | if (len < 0) |
597 | return 0; |
598 | return 1; |
599 | } |
600 | |
601 | /* |
602 | * Split a multipart/XXX message body into component parts: result is |
603 | * canonical parts in a STACK of bios |
604 | */ |
605 | static int |
606 | multi_split(BIO *bio, char *bound, STACK_OF(BIO)struct stack_st_BIO **ret) |
607 | { |
608 | char linebuf[MAX_SMLEN1024]; |
609 | int len, blen; |
610 | int eol = 0, next_eol = 0; |
611 | BIO *bpart = NULL((void*)0); |
612 | STACK_OF(BIO)struct stack_st_BIO *parts; |
613 | char state, part, first; |
614 | |
615 | blen = strlen(bound); |
616 | part = 0; |
617 | state = 0; |
Value stored to 'state' is never read | |
618 | first = 1; |
619 | parts = sk_BIO_new_null()((struct stack_st_BIO *)sk_new_null()); |
620 | *ret = parts; |
621 | if (parts == NULL((void*)0)) |
622 | return 0; |
623 | while ((len = BIO_gets(bio, linebuf, MAX_SMLEN1024)) > 0) { |
624 | state = mime_bound_check(linebuf, len, bound, blen); |
625 | if (state == 1) { |
626 | first = 1; |
627 | part++; |
628 | } else if (state == 2) { |
629 | if (sk_BIO_push(parts, bpart)sk_push(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0)), ( (void*) (1 ? (bpart) : (BIO*)0))) == 0) |
630 | return 0; |
631 | return 1; |
632 | } else if (part) { |
633 | /* Strip CR+LF from linebuf */ |
634 | next_eol = strip_eol(linebuf, &len); |
635 | if (first) { |
636 | first = 0; |
637 | if (bpart != NULL((void*)0)) { |
638 | if (sk_BIO_push(parts, bpart)sk_push(((_STACK*) (1 ? (parts) : (struct stack_st_BIO*)0)), ( (void*) (1 ? (bpart) : (BIO*)0))) == 0) |
639 | return 0; |
640 | } |
641 | bpart = BIO_new(BIO_s_mem()); |
642 | if (bpart == NULL((void*)0)) |
643 | return 0; |
644 | BIO_set_mem_eof_return(bpart, 0)BIO_ctrl(bpart,130,0,((void*)0)); |
645 | } else if (eol) |
646 | BIO_write(bpart, "\r\n", 2); |
647 | eol = next_eol; |
648 | if (len) |
649 | BIO_write(bpart, linebuf, len); |
650 | } |
651 | } |
652 | BIO_free(bpart); |
653 | return 0; |
654 | } |
655 | |
656 | /* This is the big one: parse MIME header lines up to message body */ |
657 | |
658 | #define MIME_INVALID0 0 |
659 | #define MIME_START1 1 |
660 | #define MIME_TYPE2 2 |
661 | #define MIME_NAME3 3 |
662 | #define MIME_VALUE4 4 |
663 | #define MIME_QUOTE5 5 |
664 | #define MIME_COMMENT6 6 |
665 | |
666 | |
667 | static |
668 | STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER *mime_parse_hdr(BIO *bio) |
669 | { |
670 | char *p, *q, c; |
671 | char *ntmp; |
672 | char linebuf[MAX_SMLEN1024]; |
673 | MIME_HEADER *mhdr = NULL((void*)0); |
674 | STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER *headers; |
675 | int len, state, save_state = 0; |
676 | |
677 | headers = sk_MIME_HEADER_new(mime_hdr_cmp)((struct stack_st_MIME_HEADER *)sk_new(((int (*)(const void * , const void *)) ((1 ? (mime_hdr_cmp) : (int (*)(const MIME_HEADER * const *, const MIME_HEADER * const *))0))))); |
678 | if (!headers) |
679 | return NULL((void*)0); |
680 | while ((len = BIO_gets(bio, linebuf, MAX_SMLEN1024)) > 0) { |
681 | /* If whitespace at line start then continuation line */ |
682 | if (mhdr && isspace((unsigned char)linebuf[0])) |
683 | state = MIME_NAME3; |
684 | else |
685 | state = MIME_START1; |
686 | ntmp = NULL((void*)0); |
687 | |
688 | /* Go through all characters */ |
689 | for (p = linebuf, q = linebuf; |
690 | (c = *p) && (c != '\r') && (c != '\n'); p++) { |
691 | |
692 | /* State machine to handle MIME headers |
693 | * if this looks horrible that's because it *is* |
694 | */ |
695 | |
696 | switch (state) { |
697 | case MIME_START1: |
698 | if (c == ':') { |
699 | state = MIME_TYPE2; |
700 | *p = 0; |
701 | ntmp = strip_ends(q); |
702 | q = p + 1; |
703 | } |
704 | break; |
705 | |
706 | case MIME_TYPE2: |
707 | if (c == ';') { |
708 | mime_debug("Found End Value\n"); |
709 | *p = 0; |
710 | mhdr = mime_hdr_new(ntmp, |
711 | strip_ends(q)); |
712 | if (mhdr == NULL((void*)0)) |
713 | goto merr; |
714 | if (sk_MIME_HEADER_push(headers,sk_push(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void*) (1 ? (mhdr) : (MIME_HEADER*)0))) |
715 | mhdr)sk_push(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void*) (1 ? (mhdr) : (MIME_HEADER*)0))) == 0) |
716 | goto merr; |
717 | ntmp = NULL((void*)0); |
718 | q = p + 1; |
719 | state = MIME_NAME3; |
720 | } else if (c == '(') { |
721 | save_state = state; |
722 | state = MIME_COMMENT6; |
723 | } |
724 | break; |
725 | |
726 | case MIME_COMMENT6: |
727 | if (c == ')') { |
728 | state = save_state; |
729 | } |
730 | break; |
731 | |
732 | case MIME_NAME3: |
733 | if (c == '=') { |
734 | state = MIME_VALUE4; |
735 | *p = 0; |
736 | ntmp = strip_ends(q); |
737 | q = p + 1; |
738 | } |
739 | break; |
740 | |
741 | case MIME_VALUE4: |
742 | if (c == ';') { |
743 | state = MIME_NAME3; |
744 | *p = 0; |
745 | mime_hdr_addparam(mhdr, ntmp, |
746 | strip_ends(q)); |
747 | ntmp = NULL((void*)0); |
748 | q = p + 1; |
749 | } else if (c == '"') { |
750 | mime_debug("Found Quote\n"); |
751 | state = MIME_QUOTE5; |
752 | } else if (c == '(') { |
753 | save_state = state; |
754 | state = MIME_COMMENT6; |
755 | } |
756 | break; |
757 | |
758 | case MIME_QUOTE5: |
759 | if (c == '"') { |
760 | mime_debug("Found Match Quote\n"); |
761 | state = MIME_VALUE4; |
762 | } |
763 | break; |
764 | } |
765 | } |
766 | |
767 | if (state == MIME_TYPE2) { |
768 | mhdr = mime_hdr_new(ntmp, strip_ends(q)); |
769 | if (mhdr == NULL((void*)0)) |
770 | goto merr; |
771 | if (sk_MIME_HEADER_push(headers, mhdr)sk_push(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void*) (1 ? (mhdr) : (MIME_HEADER*)0))) == 0) |
772 | goto merr; |
773 | } else if (state == MIME_VALUE4) |
774 | mime_hdr_addparam(mhdr, ntmp, strip_ends(q)); |
775 | |
776 | if (p == linebuf) |
777 | break; /* Blank line means end of headers */ |
778 | } |
779 | |
780 | return headers; |
781 | |
782 | merr: |
783 | if (mhdr != NULL((void*)0)) |
784 | mime_hdr_free(mhdr); |
785 | sk_MIME_HEADER_pop_free(headers, mime_hdr_free)sk_pop_free(((_STACK*) (1 ? (headers) : (struct stack_st_MIME_HEADER *)0)), ((void (*)(void *)) ((1 ? (mime_hdr_free) : (void (*)( MIME_HEADER *))0)))); |
786 | return NULL((void*)0); |
787 | } |
788 | |
789 | static char * |
790 | strip_ends(char *name) |
791 | { |
792 | return strip_end(strip_start(name)); |
793 | } |
794 | |
795 | /* Strip a parameter of whitespace from start of param */ |
796 | static char * |
797 | strip_start(char *name) |
798 | { |
799 | char *p, c; |
800 | |
801 | /* Look for first non white space or quote */ |
802 | for (p = name; (c = *p); p++) { |
803 | if (c == '"') { |
804 | /* Next char is start of string if non null */ |
805 | if (p[1]) |
806 | return p + 1; |
807 | /* Else null string */ |
808 | return NULL((void*)0); |
809 | } |
810 | if (!isspace((unsigned char)c)) |
811 | return p; |
812 | } |
813 | return NULL((void*)0); |
814 | } |
815 | |
816 | /* As above but strip from end of string : maybe should handle brackets? */ |
817 | static char * |
818 | strip_end(char *name) |
819 | { |
820 | char *p, c; |
821 | |
822 | if (!name) |
823 | return NULL((void*)0); |
824 | |
825 | /* Look for first non white space or quote */ |
826 | for (p = name + strlen(name) - 1; p >= name; p--) { |
827 | c = *p; |
828 | if (c == '"') { |
829 | if (p - 1 == name) |
830 | return NULL((void*)0); |
831 | *p = 0; |
832 | return name; |
833 | } |
834 | if (isspace((unsigned char)c)) |
835 | *p = 0; |
836 | else |
837 | return name; |
838 | } |
839 | return NULL((void*)0); |
840 | } |
841 | |
842 | static MIME_HEADER * |
843 | mime_hdr_new(char *name, char *value) |
844 | { |
845 | MIME_HEADER *mhdr; |
846 | char *tmpname = NULL((void*)0), *tmpval = NULL((void*)0), *p; |
847 | |
848 | if (name) { |
849 | if (!(tmpname = strdup(name))) |
850 | goto err; |
851 | for (p = tmpname; *p; p++) |
852 | *p = tolower((unsigned char)*p); |
853 | } |
854 | if (value) { |
855 | if (!(tmpval = strdup(value))) |
856 | goto err; |
857 | for (p = tmpval; *p; p++) |
858 | *p = tolower((unsigned char)*p); |
859 | } |
860 | mhdr = malloc(sizeof(MIME_HEADER)); |
861 | if (!mhdr) |
862 | goto err; |
863 | mhdr->name = tmpname; |
864 | mhdr->value = tmpval; |
865 | if (!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp)((struct stack_st_MIME_PARAM *)sk_new(((int (*)(const void *, const void *)) ((1 ? (mime_param_cmp) : (int (*)(const MIME_PARAM * const *, const MIME_PARAM * const *))0))))))) { |
866 | free(mhdr); |
867 | goto err; |
868 | } |
869 | return mhdr; |
870 | err: |
871 | free(tmpname); |
872 | free(tmpval); |
873 | return NULL((void*)0); |
874 | } |
875 | |
876 | static int |
877 | mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value) |
878 | { |
879 | char *tmpname = NULL((void*)0), *tmpval = NULL((void*)0), *p; |
880 | MIME_PARAM *mparam; |
881 | |
882 | if (name) { |
883 | tmpname = strdup(name); |
884 | if (!tmpname) |
885 | goto err; |
886 | for (p = tmpname; *p; p++) |
887 | *p = tolower((unsigned char)*p); |
888 | } |
889 | if (value) { |
890 | tmpval = strdup(value); |
891 | if (!tmpval) |
892 | goto err; |
893 | } |
894 | /* Parameter values are case sensitive so leave as is */ |
895 | mparam = malloc(sizeof(MIME_PARAM)); |
896 | if (!mparam) |
897 | goto err; |
898 | mparam->param_name = tmpname; |
899 | mparam->param_value = tmpval; |
900 | if (sk_MIME_PARAM_push(mhdr->params, mparam)sk_push(((_STACK*) (1 ? (mhdr->params) : (struct stack_st_MIME_PARAM *)0)), ((void*) (1 ? (mparam) : (MIME_PARAM*)0))) == 0) { |
901 | free(mparam); |
902 | goto err; |
903 | } |
904 | return 1; |
905 | err: |
906 | free(tmpname); |
907 | free(tmpval); |
908 | return 0; |
909 | } |
910 | |
911 | static int |
912 | mime_hdr_cmp(const MIME_HEADER * const *a, const MIME_HEADER * const *b) |
913 | { |
914 | if (!(*a)->name || !(*b)->name) |
915 | return !!(*a)->name - !!(*b)->name; |
916 | return (strcmp((*a)->name, (*b)->name)); |
917 | } |
918 | |
919 | static int |
920 | mime_param_cmp(const MIME_PARAM * const *a, const MIME_PARAM * const *b) |
921 | { |
922 | if (!(*a)->param_name || !(*b)->param_name) |
923 | return !!(*a)->param_name - !!(*b)->param_name; |
924 | return (strcmp((*a)->param_name, (*b)->param_name)); |
925 | } |
926 | |
927 | /* Find a header with a given name (if possible) */ |
928 | |
929 | static MIME_HEADER * |
930 | mime_hdr_find(STACK_OF(MIME_HEADER)struct stack_st_MIME_HEADER *hdrs, char *name) |
931 | { |
932 | MIME_HEADER htmp; |
933 | int idx; |
934 | htmp.name = name; |
935 | idx = sk_MIME_HEADER_find(hdrs, &htmp)sk_find(((_STACK*) (1 ? (hdrs) : (struct stack_st_MIME_HEADER *)0)), ((void*) (1 ? (&htmp) : (MIME_HEADER*)0))); |
936 | if (idx < 0) |
937 | return NULL((void*)0); |
938 | return sk_MIME_HEADER_value(hdrs, idx)((MIME_HEADER *)sk_value(((_STACK*) (1 ? (hdrs) : (struct stack_st_MIME_HEADER *)0)), (idx))); |
939 | } |
940 | |
941 | static MIME_PARAM * |
942 | mime_param_find(MIME_HEADER *hdr, char *name) |
943 | { |
944 | MIME_PARAM param; |
945 | int idx; |
946 | param.param_name = name; |
947 | idx = sk_MIME_PARAM_find(hdr->params, ¶m)sk_find(((_STACK*) (1 ? (hdr->params) : (struct stack_st_MIME_PARAM *)0)), ((void*) (1 ? (¶m) : (MIME_PARAM*)0))); |
948 | if (idx < 0) |
949 | return NULL((void*)0); |
950 | return sk_MIME_PARAM_value(hdr->params, idx)((MIME_PARAM *)sk_value(((_STACK*) (1 ? (hdr->params) : (struct stack_st_MIME_PARAM*)0)), (idx))); |
951 | } |
952 | |
953 | static void |
954 | mime_hdr_free(MIME_HEADER *hdr) |
955 | { |
956 | free(hdr->name); |
957 | free(hdr->value); |
958 | if (hdr->params) |
959 | sk_MIME_PARAM_pop_free(hdr->params, mime_param_free)sk_pop_free(((_STACK*) (1 ? (hdr->params) : (struct stack_st_MIME_PARAM *)0)), ((void (*)(void *)) ((1 ? (mime_param_free) : (void (* )(MIME_PARAM *))0)))); |
960 | free(hdr); |
961 | } |
962 | |
963 | static void |
964 | mime_param_free(MIME_PARAM *param) |
965 | { |
966 | free(param->param_name); |
967 | free(param->param_value); |
968 | free(param); |
969 | } |
970 | |
971 | /* Check for a multipart boundary. Returns: |
972 | * 0 : no boundary |
973 | * 1 : part boundary |
974 | * 2 : final boundary |
975 | */ |
976 | static int |
977 | mime_bound_check(char *line, int linelen, char *bound, int blen) |
978 | { |
979 | if (linelen == -1) |
980 | linelen = strlen(line); |
981 | if (blen == -1) |
982 | blen = strlen(bound); |
983 | /* Quickly eliminate if line length too short */ |
984 | if (blen + 2 > linelen) |
985 | return 0; |
986 | /* Check for part boundary */ |
987 | if (!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) { |
988 | if (!strncmp(line + blen + 2, "--", 2)) |
989 | return 2; |
990 | else |
991 | return 1; |
992 | } |
993 | return 0; |
994 | } |
995 | |
996 | static int |
997 | strip_eol(char *linebuf, int *plen) |
998 | { |
999 | int len = *plen; |
1000 | char *p, c; |
1001 | int is_eol = 0; |
1002 | |
1003 | for (p = linebuf + len - 1; len > 0; len--, p--) { |
1004 | c = *p; |
1005 | if (c == '\n') |
1006 | is_eol = 1; |
1007 | else if (c != '\r') |
1008 | break; |
1009 | } |
1010 | *plen = len; |
1011 | return is_eol; |
1012 | } |