1*de0e0e4dSAntonio Huete Jimenez /* $OpenBSD: asn_mime.c,v 1.29 2021/12/25 13:17:48 jsing Exp $ */
2f5b1c8a1SJohn Marino /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3f5b1c8a1SJohn Marino * project.
4f5b1c8a1SJohn Marino */
5f5b1c8a1SJohn Marino /* ====================================================================
6f5b1c8a1SJohn Marino * Copyright (c) 1999-2008 The OpenSSL Project. All rights reserved.
7f5b1c8a1SJohn Marino *
8f5b1c8a1SJohn Marino * Redistribution and use in source and binary forms, with or without
9f5b1c8a1SJohn Marino * modification, are permitted provided that the following conditions
10f5b1c8a1SJohn Marino * are met:
11f5b1c8a1SJohn Marino *
12f5b1c8a1SJohn Marino * 1. Redistributions of source code must retain the above copyright
13f5b1c8a1SJohn Marino * notice, this list of conditions and the following disclaimer.
14f5b1c8a1SJohn Marino *
15f5b1c8a1SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
16f5b1c8a1SJohn Marino * notice, this list of conditions and the following disclaimer in
17f5b1c8a1SJohn Marino * the documentation and/or other materials provided with the
18f5b1c8a1SJohn Marino * distribution.
19f5b1c8a1SJohn Marino *
20f5b1c8a1SJohn Marino * 3. All advertising materials mentioning features or use of this
21f5b1c8a1SJohn Marino * software must display the following acknowledgment:
22f5b1c8a1SJohn Marino * "This product includes software developed by the OpenSSL Project
23f5b1c8a1SJohn Marino * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24f5b1c8a1SJohn Marino *
25f5b1c8a1SJohn Marino * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26f5b1c8a1SJohn Marino * endorse or promote products derived from this software without
27f5b1c8a1SJohn Marino * prior written permission. For written permission, please contact
28f5b1c8a1SJohn Marino * licensing@OpenSSL.org.
29f5b1c8a1SJohn Marino *
30f5b1c8a1SJohn Marino * 5. Products derived from this software may not be called "OpenSSL"
31f5b1c8a1SJohn Marino * nor may "OpenSSL" appear in their names without prior written
32f5b1c8a1SJohn Marino * permission of the OpenSSL Project.
33f5b1c8a1SJohn Marino *
34f5b1c8a1SJohn Marino * 6. Redistributions of any form whatsoever must retain the following
35f5b1c8a1SJohn Marino * acknowledgment:
36f5b1c8a1SJohn Marino * "This product includes software developed by the OpenSSL Project
37f5b1c8a1SJohn Marino * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38f5b1c8a1SJohn Marino *
39f5b1c8a1SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40f5b1c8a1SJohn Marino * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41f5b1c8a1SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42f5b1c8a1SJohn Marino * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43f5b1c8a1SJohn Marino * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44f5b1c8a1SJohn Marino * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45f5b1c8a1SJohn Marino * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46f5b1c8a1SJohn Marino * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47f5b1c8a1SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48f5b1c8a1SJohn Marino * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49f5b1c8a1SJohn Marino * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50f5b1c8a1SJohn Marino * OF THE POSSIBILITY OF SUCH DAMAGE.
51f5b1c8a1SJohn Marino * ====================================================================
52f5b1c8a1SJohn Marino *
53f5b1c8a1SJohn Marino */
54f5b1c8a1SJohn Marino
55f5b1c8a1SJohn Marino #include <ctype.h>
56f5b1c8a1SJohn Marino #include <stdio.h>
57f5b1c8a1SJohn Marino #include <stdlib.h>
58f5b1c8a1SJohn Marino #include <string.h>
59f5b1c8a1SJohn Marino
60f5b1c8a1SJohn Marino #include <openssl/asn1.h>
61f5b1c8a1SJohn Marino #include <openssl/asn1t.h>
62f5b1c8a1SJohn Marino #include <openssl/err.h>
63f5b1c8a1SJohn Marino #include <openssl/x509.h>
64f5b1c8a1SJohn Marino
65f5b1c8a1SJohn Marino #include "asn1_locl.h"
66*de0e0e4dSAntonio Huete Jimenez #include "evp_locl.h"
67f5b1c8a1SJohn Marino
68f5b1c8a1SJohn Marino /* Generalised MIME like utilities for streaming ASN1. Although many
69f5b1c8a1SJohn Marino * have a PKCS7/CMS like flavour others are more general purpose.
70f5b1c8a1SJohn Marino */
71f5b1c8a1SJohn Marino
72f5b1c8a1SJohn Marino /* MIME format structures
73f5b1c8a1SJohn Marino * Note that all are translated to lower case apart from
74f5b1c8a1SJohn Marino * parameter values. Quotes are stripped off
75f5b1c8a1SJohn Marino */
76f5b1c8a1SJohn Marino
77f5b1c8a1SJohn Marino typedef struct {
78f5b1c8a1SJohn Marino char *param_name; /* Param name e.g. "micalg" */
79f5b1c8a1SJohn Marino char *param_value; /* Param value e.g. "sha1" */
80f5b1c8a1SJohn Marino } MIME_PARAM;
81f5b1c8a1SJohn Marino
82f5b1c8a1SJohn Marino DECLARE_STACK_OF(MIME_PARAM)
83f5b1c8a1SJohn Marino
84f5b1c8a1SJohn Marino typedef struct {
85f5b1c8a1SJohn Marino char *name; /* Name of line e.g. "content-type" */
86f5b1c8a1SJohn Marino char *value; /* Value of line e.g. "text/plain" */
87f5b1c8a1SJohn Marino STACK_OF(MIME_PARAM) *params; /* Zero or more parameters */
88f5b1c8a1SJohn Marino } MIME_HEADER;
89f5b1c8a1SJohn Marino
90f5b1c8a1SJohn Marino DECLARE_STACK_OF(MIME_HEADER)
91f5b1c8a1SJohn Marino
92f5b1c8a1SJohn Marino static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
93f5b1c8a1SJohn Marino const ASN1_ITEM *it);
94f5b1c8a1SJohn Marino static char * strip_ends(char *name);
95f5b1c8a1SJohn Marino static char * strip_start(char *name);
96f5b1c8a1SJohn Marino static char * strip_end(char *name);
97f5b1c8a1SJohn Marino static MIME_HEADER *mime_hdr_new(char *name, char *value);
98f5b1c8a1SJohn Marino static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
99f5b1c8a1SJohn Marino static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
100f5b1c8a1SJohn Marino static int mime_hdr_cmp(const MIME_HEADER * const *a,
101f5b1c8a1SJohn Marino const MIME_HEADER * const *b);
102f5b1c8a1SJohn Marino static int mime_param_cmp(const MIME_PARAM * const *a,
103f5b1c8a1SJohn Marino const MIME_PARAM * const *b);
104f5b1c8a1SJohn Marino static void mime_param_free(MIME_PARAM *param);
105f5b1c8a1SJohn Marino static int mime_bound_check(char *line, int linelen, char *bound, int blen);
106f5b1c8a1SJohn Marino static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
107f5b1c8a1SJohn Marino static int strip_eol(char *linebuf, int *plen);
108f5b1c8a1SJohn Marino static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
109f5b1c8a1SJohn Marino static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
110f5b1c8a1SJohn Marino static void mime_hdr_free(MIME_HEADER *hdr);
111f5b1c8a1SJohn Marino
112f5b1c8a1SJohn Marino #define MAX_SMLEN 1024
113f5b1c8a1SJohn Marino #define mime_debug(x) /* x */
114f5b1c8a1SJohn Marino
115f5b1c8a1SJohn Marino /* Output an ASN1 structure in BER format streaming if necessary */
116f5b1c8a1SJohn Marino
117f5b1c8a1SJohn Marino int
i2d_ASN1_bio_stream(BIO * out,ASN1_VALUE * val,BIO * in,int flags,const ASN1_ITEM * it)118f5b1c8a1SJohn Marino i2d_ASN1_bio_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
119f5b1c8a1SJohn Marino const ASN1_ITEM *it)
120f5b1c8a1SJohn Marino {
121f5b1c8a1SJohn Marino /* If streaming create stream BIO and copy all content through it */
122f5b1c8a1SJohn Marino if (flags & SMIME_STREAM) {
123f5b1c8a1SJohn Marino BIO *bio, *tbio;
124f5b1c8a1SJohn Marino bio = BIO_new_NDEF(out, val, it);
125f5b1c8a1SJohn Marino if (!bio) {
12672c33676SMaxim Ag ASN1error(ERR_R_MALLOC_FAILURE);
127f5b1c8a1SJohn Marino return 0;
128f5b1c8a1SJohn Marino }
129f5b1c8a1SJohn Marino SMIME_crlf_copy(in, bio, flags);
130f5b1c8a1SJohn Marino (void)BIO_flush(bio);
131f5b1c8a1SJohn Marino /* Free up successive BIOs until we hit the old output BIO */
132f5b1c8a1SJohn Marino do {
133f5b1c8a1SJohn Marino tbio = BIO_pop(bio);
134f5b1c8a1SJohn Marino BIO_free(bio);
135f5b1c8a1SJohn Marino bio = tbio;
136f5b1c8a1SJohn Marino } while (bio != out);
137f5b1c8a1SJohn Marino }
138f5b1c8a1SJohn Marino /* else just write out ASN1 structure which will have all content
139f5b1c8a1SJohn Marino * stored internally
140f5b1c8a1SJohn Marino */
141f5b1c8a1SJohn Marino else
142f5b1c8a1SJohn Marino ASN1_item_i2d_bio(it, out, val);
143f5b1c8a1SJohn Marino return 1;
144f5b1c8a1SJohn Marino }
145f5b1c8a1SJohn Marino
146f5b1c8a1SJohn Marino /* Base 64 read and write of ASN1 structure */
147f5b1c8a1SJohn Marino
148f5b1c8a1SJohn Marino static int
B64_write_ASN1(BIO * out,ASN1_VALUE * val,BIO * in,int flags,const ASN1_ITEM * it)149f5b1c8a1SJohn Marino B64_write_ASN1(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
150f5b1c8a1SJohn Marino const ASN1_ITEM *it)
151f5b1c8a1SJohn Marino {
152f5b1c8a1SJohn Marino BIO *b64;
153f5b1c8a1SJohn Marino int r;
154f5b1c8a1SJohn Marino
155f5b1c8a1SJohn Marino b64 = BIO_new(BIO_f_base64());
156f5b1c8a1SJohn Marino if (!b64) {
15772c33676SMaxim Ag ASN1error(ERR_R_MALLOC_FAILURE);
158f5b1c8a1SJohn Marino return 0;
159f5b1c8a1SJohn Marino }
160f5b1c8a1SJohn Marino /* prepend the b64 BIO so all data is base64 encoded.
161f5b1c8a1SJohn Marino */
162f5b1c8a1SJohn Marino out = BIO_push(b64, out);
163f5b1c8a1SJohn Marino r = i2d_ASN1_bio_stream(out, val, in, flags, it);
164f5b1c8a1SJohn Marino (void)BIO_flush(out);
165f5b1c8a1SJohn Marino BIO_pop(out);
166f5b1c8a1SJohn Marino BIO_free(b64);
167f5b1c8a1SJohn Marino return r;
168f5b1c8a1SJohn Marino }
169f5b1c8a1SJohn Marino
170f5b1c8a1SJohn Marino /* Streaming ASN1 PEM write */
171f5b1c8a1SJohn Marino
172f5b1c8a1SJohn Marino int
PEM_write_bio_ASN1_stream(BIO * out,ASN1_VALUE * val,BIO * in,int flags,const char * hdr,const ASN1_ITEM * it)173f5b1c8a1SJohn Marino PEM_write_bio_ASN1_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
174f5b1c8a1SJohn Marino const char *hdr, const ASN1_ITEM *it)
175f5b1c8a1SJohn Marino {
176f5b1c8a1SJohn Marino int r;
177f5b1c8a1SJohn Marino
178f5b1c8a1SJohn Marino BIO_printf(out, "-----BEGIN %s-----\n", hdr);
179f5b1c8a1SJohn Marino r = B64_write_ASN1(out, val, in, flags, it);
180f5b1c8a1SJohn Marino BIO_printf(out, "-----END %s-----\n", hdr);
181f5b1c8a1SJohn Marino return r;
182f5b1c8a1SJohn Marino }
183f5b1c8a1SJohn Marino
184f5b1c8a1SJohn Marino static ASN1_VALUE *
b64_read_asn1(BIO * bio,const ASN1_ITEM * it)185f5b1c8a1SJohn Marino b64_read_asn1(BIO *bio, const ASN1_ITEM *it)
186f5b1c8a1SJohn Marino {
187f5b1c8a1SJohn Marino BIO *b64;
188f5b1c8a1SJohn Marino ASN1_VALUE *val;
189f5b1c8a1SJohn Marino if (!(b64 = BIO_new(BIO_f_base64()))) {
19072c33676SMaxim Ag ASN1error(ERR_R_MALLOC_FAILURE);
191f5b1c8a1SJohn Marino return 0;
192f5b1c8a1SJohn Marino }
193f5b1c8a1SJohn Marino bio = BIO_push(b64, bio);
194f5b1c8a1SJohn Marino val = ASN1_item_d2i_bio(it, bio, NULL);
195f5b1c8a1SJohn Marino if (!val)
19672c33676SMaxim Ag ASN1error(ASN1_R_DECODE_ERROR);
197f5b1c8a1SJohn Marino (void)BIO_flush(bio);
198f5b1c8a1SJohn Marino bio = BIO_pop(bio);
199f5b1c8a1SJohn Marino BIO_free(b64);
200f5b1c8a1SJohn Marino return val;
201f5b1c8a1SJohn Marino }
202f5b1c8a1SJohn Marino
203f5b1c8a1SJohn Marino /* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
204f5b1c8a1SJohn Marino
205f5b1c8a1SJohn Marino static int
asn1_write_micalg(BIO * out,STACK_OF (X509_ALGOR)* mdalgs)206f5b1c8a1SJohn Marino asn1_write_micalg(BIO *out, STACK_OF(X509_ALGOR) *mdalgs)
207f5b1c8a1SJohn Marino {
208f5b1c8a1SJohn Marino const EVP_MD *md;
209f5b1c8a1SJohn Marino int i, have_unknown = 0, write_comma, ret = 0, md_nid;
210f5b1c8a1SJohn Marino
211f5b1c8a1SJohn Marino have_unknown = 0;
212f5b1c8a1SJohn Marino write_comma = 0;
213f5b1c8a1SJohn Marino for (i = 0; i < sk_X509_ALGOR_num(mdalgs); i++) {
214f5b1c8a1SJohn Marino if (write_comma)
215f5b1c8a1SJohn Marino BIO_write(out, ",", 1);
216f5b1c8a1SJohn Marino write_comma = 1;
217f5b1c8a1SJohn Marino md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm);
218f5b1c8a1SJohn Marino md = EVP_get_digestbynid(md_nid);
219f5b1c8a1SJohn Marino if (md && md->md_ctrl) {
220f5b1c8a1SJohn Marino int rv;
221f5b1c8a1SJohn Marino char *micstr;
222f5b1c8a1SJohn Marino rv = md->md_ctrl(NULL, EVP_MD_CTRL_MICALG, 0, &micstr);
223f5b1c8a1SJohn Marino if (rv > 0) {
224f5b1c8a1SJohn Marino BIO_puts(out, micstr);
225f5b1c8a1SJohn Marino free(micstr);
226f5b1c8a1SJohn Marino continue;
227f5b1c8a1SJohn Marino }
228f5b1c8a1SJohn Marino if (rv != -2)
229f5b1c8a1SJohn Marino goto err;
230f5b1c8a1SJohn Marino }
231f5b1c8a1SJohn Marino switch (md_nid) {
232f5b1c8a1SJohn Marino case NID_sha1:
233f5b1c8a1SJohn Marino BIO_puts(out, "sha1");
234f5b1c8a1SJohn Marino break;
235f5b1c8a1SJohn Marino
236f5b1c8a1SJohn Marino case NID_md5:
237f5b1c8a1SJohn Marino BIO_puts(out, "md5");
238f5b1c8a1SJohn Marino break;
239f5b1c8a1SJohn Marino
240f5b1c8a1SJohn Marino case NID_sha256:
241f5b1c8a1SJohn Marino BIO_puts(out, "sha-256");
242f5b1c8a1SJohn Marino break;
243f5b1c8a1SJohn Marino
244f5b1c8a1SJohn Marino case NID_sha384:
245f5b1c8a1SJohn Marino BIO_puts(out, "sha-384");
246f5b1c8a1SJohn Marino break;
247f5b1c8a1SJohn Marino
248f5b1c8a1SJohn Marino case NID_sha512:
249f5b1c8a1SJohn Marino BIO_puts(out, "sha-512");
250f5b1c8a1SJohn Marino break;
251f5b1c8a1SJohn Marino
252f5b1c8a1SJohn Marino case NID_id_GostR3411_94:
253f5b1c8a1SJohn Marino BIO_puts(out, "gostr3411-94");
254f5b1c8a1SJohn Marino goto err;
255f5b1c8a1SJohn Marino break;
256f5b1c8a1SJohn Marino
257f5b1c8a1SJohn Marino default:
258f5b1c8a1SJohn Marino if (have_unknown)
259f5b1c8a1SJohn Marino write_comma = 0;
260f5b1c8a1SJohn Marino else {
261f5b1c8a1SJohn Marino BIO_puts(out, "unknown");
262f5b1c8a1SJohn Marino have_unknown = 1;
263f5b1c8a1SJohn Marino }
264f5b1c8a1SJohn Marino break;
265f5b1c8a1SJohn Marino
266f5b1c8a1SJohn Marino }
267f5b1c8a1SJohn Marino }
268f5b1c8a1SJohn Marino
269f5b1c8a1SJohn Marino ret = 1;
270f5b1c8a1SJohn Marino
271f5b1c8a1SJohn Marino err:
272f5b1c8a1SJohn Marino return ret;
273f5b1c8a1SJohn Marino }
274f5b1c8a1SJohn Marino
275f5b1c8a1SJohn Marino /* SMIME sender */
276f5b1c8a1SJohn Marino
277f5b1c8a1SJohn Marino int
SMIME_write_ASN1(BIO * bio,ASN1_VALUE * val,BIO * data,int flags,int ctype_nid,int econt_nid,STACK_OF (X509_ALGOR)* mdalgs,const ASN1_ITEM * it)278f5b1c8a1SJohn Marino SMIME_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
279f5b1c8a1SJohn Marino int ctype_nid, int econt_nid, STACK_OF(X509_ALGOR) *mdalgs,
280f5b1c8a1SJohn Marino const ASN1_ITEM *it)
281f5b1c8a1SJohn Marino {
282f5b1c8a1SJohn Marino char bound[33], c;
283f5b1c8a1SJohn Marino int i;
284f5b1c8a1SJohn Marino const char *mime_prefix, *mime_eol, *cname = "smime.p7m";
285f5b1c8a1SJohn Marino const char *msg_type = NULL;
286f5b1c8a1SJohn Marino
287f5b1c8a1SJohn Marino if (flags & SMIME_OLDMIME)
288f5b1c8a1SJohn Marino mime_prefix = "application/x-pkcs7-";
289f5b1c8a1SJohn Marino else
290f5b1c8a1SJohn Marino mime_prefix = "application/pkcs7-";
291f5b1c8a1SJohn Marino
292f5b1c8a1SJohn Marino if (flags & SMIME_CRLFEOL)
293f5b1c8a1SJohn Marino mime_eol = "\r\n";
294f5b1c8a1SJohn Marino else
295f5b1c8a1SJohn Marino mime_eol = "\n";
296f5b1c8a1SJohn Marino if ((flags & SMIME_DETACHED) && data) {
297f5b1c8a1SJohn Marino /* We want multipart/signed */
298f5b1c8a1SJohn Marino /* Generate a random boundary */
299f5b1c8a1SJohn Marino arc4random_buf(bound, 32);
300f5b1c8a1SJohn Marino for (i = 0; i < 32; i++) {
301f5b1c8a1SJohn Marino c = bound[i] & 0xf;
302f5b1c8a1SJohn Marino if (c < 10)
303f5b1c8a1SJohn Marino c += '0';
304f5b1c8a1SJohn Marino else
305f5b1c8a1SJohn Marino c += 'A' - 10;
306f5b1c8a1SJohn Marino bound[i] = c;
307f5b1c8a1SJohn Marino }
308f5b1c8a1SJohn Marino bound[32] = 0;
309f5b1c8a1SJohn Marino BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
310f5b1c8a1SJohn Marino BIO_printf(bio, "Content-Type: multipart/signed;");
311f5b1c8a1SJohn Marino BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
312f5b1c8a1SJohn Marino BIO_puts(bio, " micalg=\"");
313f5b1c8a1SJohn Marino asn1_write_micalg(bio, mdalgs);
314f5b1c8a1SJohn Marino BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
315f5b1c8a1SJohn Marino bound, mime_eol, mime_eol);
316f5b1c8a1SJohn Marino BIO_printf(bio, "This is an S/MIME signed message%s%s",
317f5b1c8a1SJohn Marino mime_eol, mime_eol);
318f5b1c8a1SJohn Marino /* Now write out the first part */
319f5b1c8a1SJohn Marino BIO_printf(bio, "------%s%s", bound, mime_eol);
320f5b1c8a1SJohn Marino if (!asn1_output_data(bio, data, val, flags, it))
321f5b1c8a1SJohn Marino return 0;
322f5b1c8a1SJohn Marino BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
323f5b1c8a1SJohn Marino
324f5b1c8a1SJohn Marino /* Headers for signature */
325f5b1c8a1SJohn Marino
326f5b1c8a1SJohn Marino BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix);
327f5b1c8a1SJohn Marino BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
328f5b1c8a1SJohn Marino BIO_printf(bio, "Content-Transfer-Encoding: base64%s",
329f5b1c8a1SJohn Marino mime_eol);
330f5b1c8a1SJohn Marino BIO_printf(bio, "Content-Disposition: attachment;");
331f5b1c8a1SJohn Marino BIO_printf(bio, " filename=\"smime.p7s\"%s%s",
332f5b1c8a1SJohn Marino mime_eol, mime_eol);
333f5b1c8a1SJohn Marino B64_write_ASN1(bio, val, NULL, 0, it);
334f5b1c8a1SJohn Marino BIO_printf(bio, "%s------%s--%s%s", mime_eol, bound,
335f5b1c8a1SJohn Marino mime_eol, mime_eol);
336f5b1c8a1SJohn Marino return 1;
337f5b1c8a1SJohn Marino }
338f5b1c8a1SJohn Marino
339f5b1c8a1SJohn Marino /* Determine smime-type header */
340f5b1c8a1SJohn Marino
341f5b1c8a1SJohn Marino if (ctype_nid == NID_pkcs7_enveloped)
342f5b1c8a1SJohn Marino msg_type = "enveloped-data";
343f5b1c8a1SJohn Marino else if (ctype_nid == NID_pkcs7_signed) {
344f5b1c8a1SJohn Marino if (econt_nid == NID_id_smime_ct_receipt)
345f5b1c8a1SJohn Marino msg_type = "signed-receipt";
346f5b1c8a1SJohn Marino else if (sk_X509_ALGOR_num(mdalgs) >= 0)
347f5b1c8a1SJohn Marino msg_type = "signed-data";
348f5b1c8a1SJohn Marino else
349f5b1c8a1SJohn Marino msg_type = "certs-only";
350f5b1c8a1SJohn Marino } else if (ctype_nid == NID_id_smime_ct_compressedData) {
351f5b1c8a1SJohn Marino msg_type = "compressed-data";
352f5b1c8a1SJohn Marino cname = "smime.p7z";
353f5b1c8a1SJohn Marino }
354f5b1c8a1SJohn Marino /* MIME headers */
355f5b1c8a1SJohn Marino BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
356f5b1c8a1SJohn Marino BIO_printf(bio, "Content-Disposition: attachment;");
357f5b1c8a1SJohn Marino BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol);
358f5b1c8a1SJohn Marino BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
359f5b1c8a1SJohn Marino if (msg_type)
360f5b1c8a1SJohn Marino BIO_printf(bio, " smime-type=%s;", msg_type);
361f5b1c8a1SJohn Marino BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol);
362f5b1c8a1SJohn Marino BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
363f5b1c8a1SJohn Marino mime_eol, mime_eol);
364f5b1c8a1SJohn Marino if (!B64_write_ASN1(bio, val, data, flags, it))
365f5b1c8a1SJohn Marino return 0;
366f5b1c8a1SJohn Marino BIO_printf(bio, "%s", mime_eol);
367f5b1c8a1SJohn Marino return 1;
368f5b1c8a1SJohn Marino }
369f5b1c8a1SJohn Marino
370f5b1c8a1SJohn Marino /* Handle output of ASN1 data */
371f5b1c8a1SJohn Marino
372f5b1c8a1SJohn Marino
373f5b1c8a1SJohn Marino static int
asn1_output_data(BIO * out,BIO * data,ASN1_VALUE * val,int flags,const ASN1_ITEM * it)374f5b1c8a1SJohn Marino asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
375f5b1c8a1SJohn Marino const ASN1_ITEM *it)
376f5b1c8a1SJohn Marino {
377f5b1c8a1SJohn Marino BIO *tmpbio;
378f5b1c8a1SJohn Marino const ASN1_AUX *aux = it->funcs;
379f5b1c8a1SJohn Marino ASN1_STREAM_ARG sarg;
380f5b1c8a1SJohn Marino int rv = 1;
381f5b1c8a1SJohn Marino
382f5b1c8a1SJohn Marino /* If data is not deteched or resigning then the output BIO is
383f5b1c8a1SJohn Marino * already set up to finalise when it is written through.
384f5b1c8a1SJohn Marino */
385f5b1c8a1SJohn Marino if (!(flags & SMIME_DETACHED) || (flags & PKCS7_REUSE_DIGEST)) {
386f5b1c8a1SJohn Marino SMIME_crlf_copy(data, out, flags);
387f5b1c8a1SJohn Marino return 1;
388f5b1c8a1SJohn Marino }
389f5b1c8a1SJohn Marino
390f5b1c8a1SJohn Marino if (!aux || !aux->asn1_cb) {
39172c33676SMaxim Ag ASN1error(ASN1_R_STREAMING_NOT_SUPPORTED);
392f5b1c8a1SJohn Marino return 0;
393f5b1c8a1SJohn Marino }
394f5b1c8a1SJohn Marino
395f5b1c8a1SJohn Marino sarg.out = out;
396f5b1c8a1SJohn Marino sarg.ndef_bio = NULL;
397f5b1c8a1SJohn Marino sarg.boundary = NULL;
398f5b1c8a1SJohn Marino
399f5b1c8a1SJohn Marino /* Let ASN1 code prepend any needed BIOs */
400f5b1c8a1SJohn Marino
401f5b1c8a1SJohn Marino if (aux->asn1_cb(ASN1_OP_DETACHED_PRE, &val, it, &sarg) <= 0)
402f5b1c8a1SJohn Marino return 0;
403f5b1c8a1SJohn Marino
404f5b1c8a1SJohn Marino /* Copy data across, passing through filter BIOs for processing */
405f5b1c8a1SJohn Marino SMIME_crlf_copy(data, sarg.ndef_bio, flags);
406f5b1c8a1SJohn Marino
407f5b1c8a1SJohn Marino /* Finalize structure */
408f5b1c8a1SJohn Marino if (aux->asn1_cb(ASN1_OP_DETACHED_POST, &val, it, &sarg) <= 0)
409f5b1c8a1SJohn Marino rv = 0;
410f5b1c8a1SJohn Marino
411f5b1c8a1SJohn Marino /* Now remove any digests prepended to the BIO */
412f5b1c8a1SJohn Marino
413f5b1c8a1SJohn Marino while (sarg.ndef_bio != out) {
414f5b1c8a1SJohn Marino tmpbio = BIO_pop(sarg.ndef_bio);
415f5b1c8a1SJohn Marino BIO_free(sarg.ndef_bio);
416f5b1c8a1SJohn Marino sarg.ndef_bio = tmpbio;
417f5b1c8a1SJohn Marino }
418f5b1c8a1SJohn Marino
419f5b1c8a1SJohn Marino return rv;
420f5b1c8a1SJohn Marino }
421f5b1c8a1SJohn Marino
422f5b1c8a1SJohn Marino /* SMIME reader: handle multipart/signed and opaque signing.
423f5b1c8a1SJohn Marino * in multipart case the content is placed in a memory BIO
424f5b1c8a1SJohn Marino * pointed to by "bcont". In opaque this is set to NULL
425f5b1c8a1SJohn Marino */
426f5b1c8a1SJohn Marino
427f5b1c8a1SJohn Marino ASN1_VALUE *
SMIME_read_ASN1(BIO * bio,BIO ** bcont,const ASN1_ITEM * it)428f5b1c8a1SJohn Marino SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it)
429f5b1c8a1SJohn Marino {
430f5b1c8a1SJohn Marino BIO *asnin;
431f5b1c8a1SJohn Marino STACK_OF(MIME_HEADER) *headers = NULL;
432f5b1c8a1SJohn Marino STACK_OF(BIO) *parts = NULL;
433f5b1c8a1SJohn Marino MIME_HEADER *hdr;
434f5b1c8a1SJohn Marino MIME_PARAM *prm;
435f5b1c8a1SJohn Marino ASN1_VALUE *val;
436f5b1c8a1SJohn Marino int ret;
437f5b1c8a1SJohn Marino
438f5b1c8a1SJohn Marino if (bcont)
439f5b1c8a1SJohn Marino *bcont = NULL;
440f5b1c8a1SJohn Marino
441f5b1c8a1SJohn Marino if (!(headers = mime_parse_hdr(bio))) {
44272c33676SMaxim Ag ASN1error(ASN1_R_MIME_PARSE_ERROR);
443f5b1c8a1SJohn Marino return NULL;
444f5b1c8a1SJohn Marino }
445f5b1c8a1SJohn Marino
446f5b1c8a1SJohn Marino if (!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
447f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
44872c33676SMaxim Ag ASN1error(ASN1_R_NO_CONTENT_TYPE);
449f5b1c8a1SJohn Marino return NULL;
450f5b1c8a1SJohn Marino }
451f5b1c8a1SJohn Marino
452f5b1c8a1SJohn Marino /* Handle multipart/signed */
453f5b1c8a1SJohn Marino
454f5b1c8a1SJohn Marino if (!strcmp(hdr->value, "multipart/signed")) {
455f5b1c8a1SJohn Marino /* Split into two parts */
456f5b1c8a1SJohn Marino prm = mime_param_find(hdr, "boundary");
457f5b1c8a1SJohn Marino if (!prm || !prm->param_value) {
458f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
45972c33676SMaxim Ag ASN1error(ASN1_R_NO_MULTIPART_BOUNDARY);
460f5b1c8a1SJohn Marino return NULL;
461f5b1c8a1SJohn Marino }
462f5b1c8a1SJohn Marino ret = multi_split(bio, prm->param_value, &parts);
463f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
464f5b1c8a1SJohn Marino if (!ret || (sk_BIO_num(parts) != 2) ) {
46572c33676SMaxim Ag ASN1error(ASN1_R_NO_MULTIPART_BODY_FAILURE);
466f5b1c8a1SJohn Marino sk_BIO_pop_free(parts, BIO_vfree);
467f5b1c8a1SJohn Marino return NULL;
468f5b1c8a1SJohn Marino }
469f5b1c8a1SJohn Marino
470f5b1c8a1SJohn Marino /* Parse the signature piece */
471f5b1c8a1SJohn Marino asnin = sk_BIO_value(parts, 1);
472f5b1c8a1SJohn Marino
473f5b1c8a1SJohn Marino if (!(headers = mime_parse_hdr(asnin))) {
47472c33676SMaxim Ag ASN1error(ASN1_R_MIME_SIG_PARSE_ERROR);
475f5b1c8a1SJohn Marino sk_BIO_pop_free(parts, BIO_vfree);
476f5b1c8a1SJohn Marino return NULL;
477f5b1c8a1SJohn Marino }
478f5b1c8a1SJohn Marino
479f5b1c8a1SJohn Marino /* Get content type */
480f5b1c8a1SJohn Marino
481f5b1c8a1SJohn Marino if (!(hdr = mime_hdr_find(headers, "content-type")) ||
482f5b1c8a1SJohn Marino !hdr->value) {
483f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
484f5b1c8a1SJohn Marino sk_BIO_pop_free(parts, BIO_vfree);
48572c33676SMaxim Ag ASN1error(ASN1_R_NO_SIG_CONTENT_TYPE);
486f5b1c8a1SJohn Marino return NULL;
487f5b1c8a1SJohn Marino }
488f5b1c8a1SJohn Marino
489f5b1c8a1SJohn Marino if (strcmp(hdr->value, "application/x-pkcs7-signature") &&
490f5b1c8a1SJohn Marino strcmp(hdr->value, "application/pkcs7-signature")) {
49172c33676SMaxim Ag ASN1error(ASN1_R_SIG_INVALID_MIME_TYPE);
492f5b1c8a1SJohn Marino ERR_asprintf_error_data("type: %s", hdr->value);
493f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
494f5b1c8a1SJohn Marino sk_BIO_pop_free(parts, BIO_vfree);
495f5b1c8a1SJohn Marino return NULL;
496f5b1c8a1SJohn Marino }
497f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
498f5b1c8a1SJohn Marino /* Read in ASN1 */
499f5b1c8a1SJohn Marino if (!(val = b64_read_asn1(asnin, it))) {
50072c33676SMaxim Ag ASN1error(ASN1_R_ASN1_SIG_PARSE_ERROR);
501f5b1c8a1SJohn Marino sk_BIO_pop_free(parts, BIO_vfree);
502f5b1c8a1SJohn Marino return NULL;
503f5b1c8a1SJohn Marino }
504f5b1c8a1SJohn Marino
505f5b1c8a1SJohn Marino if (bcont) {
506f5b1c8a1SJohn Marino *bcont = sk_BIO_value(parts, 0);
507f5b1c8a1SJohn Marino BIO_free(asnin);
508f5b1c8a1SJohn Marino sk_BIO_free(parts);
509f5b1c8a1SJohn Marino } else sk_BIO_pop_free(parts, BIO_vfree);
510f5b1c8a1SJohn Marino return val;
511f5b1c8a1SJohn Marino }
512f5b1c8a1SJohn Marino
513f5b1c8a1SJohn Marino /* OK, if not multipart/signed try opaque signature */
514f5b1c8a1SJohn Marino
515f5b1c8a1SJohn Marino if (strcmp (hdr->value, "application/x-pkcs7-mime") &&
516f5b1c8a1SJohn Marino strcmp (hdr->value, "application/pkcs7-mime")) {
51772c33676SMaxim Ag ASN1error(ASN1_R_INVALID_MIME_TYPE);
518f5b1c8a1SJohn Marino ERR_asprintf_error_data("type: %s", hdr->value);
519f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
520f5b1c8a1SJohn Marino return NULL;
521f5b1c8a1SJohn Marino }
522f5b1c8a1SJohn Marino
523f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
524f5b1c8a1SJohn Marino
525f5b1c8a1SJohn Marino if (!(val = b64_read_asn1(bio, it))) {
52672c33676SMaxim Ag ASN1error(ASN1_R_ASN1_PARSE_ERROR);
527f5b1c8a1SJohn Marino return NULL;
528f5b1c8a1SJohn Marino }
529f5b1c8a1SJohn Marino return val;
530f5b1c8a1SJohn Marino }
531f5b1c8a1SJohn Marino
532f5b1c8a1SJohn Marino /* Copy text from one BIO to another making the output CRLF at EOL */
533f5b1c8a1SJohn Marino int
SMIME_crlf_copy(BIO * in,BIO * out,int flags)534f5b1c8a1SJohn Marino SMIME_crlf_copy(BIO *in, BIO *out, int flags)
535f5b1c8a1SJohn Marino {
536f5b1c8a1SJohn Marino BIO *bf;
537f5b1c8a1SJohn Marino char eol;
538f5b1c8a1SJohn Marino int len;
539f5b1c8a1SJohn Marino char linebuf[MAX_SMLEN];
540f5b1c8a1SJohn Marino
541f5b1c8a1SJohn Marino /* Buffer output so we don't write one line at a time. This is
542f5b1c8a1SJohn Marino * useful when streaming as we don't end up with one OCTET STRING
543f5b1c8a1SJohn Marino * per line.
544f5b1c8a1SJohn Marino */
545f5b1c8a1SJohn Marino bf = BIO_new(BIO_f_buffer());
546f5b1c8a1SJohn Marino if (!bf)
547f5b1c8a1SJohn Marino return 0;
548f5b1c8a1SJohn Marino out = BIO_push(bf, out);
549f5b1c8a1SJohn Marino if (flags & SMIME_BINARY) {
550f5b1c8a1SJohn Marino while ((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
551f5b1c8a1SJohn Marino BIO_write(out, linebuf, len);
552f5b1c8a1SJohn Marino } else {
553f5b1c8a1SJohn Marino if (flags & SMIME_TEXT)
554f5b1c8a1SJohn Marino BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
555f5b1c8a1SJohn Marino while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0) {
556f5b1c8a1SJohn Marino eol = strip_eol(linebuf, &len);
557f5b1c8a1SJohn Marino if (len)
558f5b1c8a1SJohn Marino BIO_write(out, linebuf, len);
559f5b1c8a1SJohn Marino if (eol)
560f5b1c8a1SJohn Marino BIO_write(out, "\r\n", 2);
561f5b1c8a1SJohn Marino }
562f5b1c8a1SJohn Marino }
563f5b1c8a1SJohn Marino (void)BIO_flush(out);
564f5b1c8a1SJohn Marino BIO_pop(out);
565f5b1c8a1SJohn Marino BIO_free(bf);
566f5b1c8a1SJohn Marino return 1;
567f5b1c8a1SJohn Marino }
568f5b1c8a1SJohn Marino
569f5b1c8a1SJohn Marino /* Strip off headers if they are text/plain */
570f5b1c8a1SJohn Marino int
SMIME_text(BIO * in,BIO * out)571f5b1c8a1SJohn Marino SMIME_text(BIO *in, BIO *out)
572f5b1c8a1SJohn Marino {
573f5b1c8a1SJohn Marino char iobuf[4096];
574f5b1c8a1SJohn Marino int len;
575f5b1c8a1SJohn Marino STACK_OF(MIME_HEADER) *headers;
576f5b1c8a1SJohn Marino MIME_HEADER *hdr;
577f5b1c8a1SJohn Marino
578f5b1c8a1SJohn Marino if (!(headers = mime_parse_hdr(in))) {
57972c33676SMaxim Ag ASN1error(ASN1_R_MIME_PARSE_ERROR);
580f5b1c8a1SJohn Marino return 0;
581f5b1c8a1SJohn Marino }
582f5b1c8a1SJohn Marino if (!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
58372c33676SMaxim Ag ASN1error(ASN1_R_MIME_NO_CONTENT_TYPE);
584f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
585f5b1c8a1SJohn Marino return 0;
586f5b1c8a1SJohn Marino }
587f5b1c8a1SJohn Marino if (strcmp (hdr->value, "text/plain")) {
58872c33676SMaxim Ag ASN1error(ASN1_R_INVALID_MIME_TYPE);
589f5b1c8a1SJohn Marino ERR_asprintf_error_data("type: %s", hdr->value);
590f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
591f5b1c8a1SJohn Marino return 0;
592f5b1c8a1SJohn Marino }
593f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
594f5b1c8a1SJohn Marino while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
595f5b1c8a1SJohn Marino BIO_write(out, iobuf, len);
596f5b1c8a1SJohn Marino if (len < 0)
597f5b1c8a1SJohn Marino return 0;
598f5b1c8a1SJohn Marino return 1;
599f5b1c8a1SJohn Marino }
600f5b1c8a1SJohn Marino
601f5b1c8a1SJohn Marino /*
602f5b1c8a1SJohn Marino * Split a multipart/XXX message body into component parts: result is
603f5b1c8a1SJohn Marino * canonical parts in a STACK of bios
604f5b1c8a1SJohn Marino */
605f5b1c8a1SJohn Marino static int
multi_split(BIO * bio,char * bound,STACK_OF (BIO)** ret)606f5b1c8a1SJohn Marino multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
607f5b1c8a1SJohn Marino {
608f5b1c8a1SJohn Marino char linebuf[MAX_SMLEN];
609f5b1c8a1SJohn Marino int len, blen;
610f5b1c8a1SJohn Marino int eol = 0, next_eol = 0;
611f5b1c8a1SJohn Marino BIO *bpart = NULL;
612f5b1c8a1SJohn Marino STACK_OF(BIO) *parts;
613f5b1c8a1SJohn Marino char state, part, first;
614f5b1c8a1SJohn Marino
615f5b1c8a1SJohn Marino blen = strlen(bound);
616f5b1c8a1SJohn Marino part = 0;
617f5b1c8a1SJohn Marino state = 0;
618f5b1c8a1SJohn Marino first = 1;
619f5b1c8a1SJohn Marino parts = sk_BIO_new_null();
620f5b1c8a1SJohn Marino *ret = parts;
621f5b1c8a1SJohn Marino if (parts == NULL)
622f5b1c8a1SJohn Marino return 0;
623f5b1c8a1SJohn Marino while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
624f5b1c8a1SJohn Marino state = mime_bound_check(linebuf, len, bound, blen);
625f5b1c8a1SJohn Marino if (state == 1) {
626f5b1c8a1SJohn Marino first = 1;
627f5b1c8a1SJohn Marino part++;
628f5b1c8a1SJohn Marino } else if (state == 2) {
629f5b1c8a1SJohn Marino if (sk_BIO_push(parts, bpart) == 0)
630f5b1c8a1SJohn Marino return 0;
631f5b1c8a1SJohn Marino return 1;
632f5b1c8a1SJohn Marino } else if (part) {
633f5b1c8a1SJohn Marino /* Strip CR+LF from linebuf */
634f5b1c8a1SJohn Marino next_eol = strip_eol(linebuf, &len);
635f5b1c8a1SJohn Marino if (first) {
636f5b1c8a1SJohn Marino first = 0;
637f5b1c8a1SJohn Marino if (bpart != NULL) {
638f5b1c8a1SJohn Marino if (sk_BIO_push(parts, bpart) == 0)
639f5b1c8a1SJohn Marino return 0;
640f5b1c8a1SJohn Marino }
641f5b1c8a1SJohn Marino bpart = BIO_new(BIO_s_mem());
642f5b1c8a1SJohn Marino if (bpart == NULL)
643f5b1c8a1SJohn Marino return 0;
644f5b1c8a1SJohn Marino BIO_set_mem_eof_return(bpart, 0);
645f5b1c8a1SJohn Marino } else if (eol)
646f5b1c8a1SJohn Marino BIO_write(bpart, "\r\n", 2);
647f5b1c8a1SJohn Marino eol = next_eol;
648f5b1c8a1SJohn Marino if (len)
649f5b1c8a1SJohn Marino BIO_write(bpart, linebuf, len);
650f5b1c8a1SJohn Marino }
651f5b1c8a1SJohn Marino }
652f5b1c8a1SJohn Marino BIO_free(bpart);
653f5b1c8a1SJohn Marino return 0;
654f5b1c8a1SJohn Marino }
655f5b1c8a1SJohn Marino
656f5b1c8a1SJohn Marino /* This is the big one: parse MIME header lines up to message body */
657f5b1c8a1SJohn Marino
658f5b1c8a1SJohn Marino #define MIME_INVALID 0
659f5b1c8a1SJohn Marino #define MIME_START 1
660f5b1c8a1SJohn Marino #define MIME_TYPE 2
661f5b1c8a1SJohn Marino #define MIME_NAME 3
662f5b1c8a1SJohn Marino #define MIME_VALUE 4
663f5b1c8a1SJohn Marino #define MIME_QUOTE 5
664f5b1c8a1SJohn Marino #define MIME_COMMENT 6
665f5b1c8a1SJohn Marino
666f5b1c8a1SJohn Marino
667f5b1c8a1SJohn Marino static
STACK_OF(MIME_HEADER)668f5b1c8a1SJohn Marino STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
669f5b1c8a1SJohn Marino {
670f5b1c8a1SJohn Marino char *p, *q, c;
671f5b1c8a1SJohn Marino char *ntmp;
672f5b1c8a1SJohn Marino char linebuf[MAX_SMLEN];
673f5b1c8a1SJohn Marino MIME_HEADER *mhdr = NULL;
674f5b1c8a1SJohn Marino STACK_OF(MIME_HEADER) *headers;
675f5b1c8a1SJohn Marino int len, state, save_state = 0;
676f5b1c8a1SJohn Marino
677f5b1c8a1SJohn Marino headers = sk_MIME_HEADER_new(mime_hdr_cmp);
678f5b1c8a1SJohn Marino if (!headers)
679f5b1c8a1SJohn Marino return NULL;
680f5b1c8a1SJohn Marino while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
681f5b1c8a1SJohn Marino /* If whitespace at line start then continuation line */
682f5b1c8a1SJohn Marino if (mhdr && isspace((unsigned char)linebuf[0]))
683f5b1c8a1SJohn Marino state = MIME_NAME;
684f5b1c8a1SJohn Marino else
685f5b1c8a1SJohn Marino state = MIME_START;
686f5b1c8a1SJohn Marino ntmp = NULL;
687f5b1c8a1SJohn Marino
688f5b1c8a1SJohn Marino /* Go through all characters */
689f5b1c8a1SJohn Marino for (p = linebuf, q = linebuf;
690f5b1c8a1SJohn Marino (c = *p) && (c != '\r') && (c != '\n'); p++) {
691f5b1c8a1SJohn Marino
692f5b1c8a1SJohn Marino /* State machine to handle MIME headers
693f5b1c8a1SJohn Marino * if this looks horrible that's because it *is*
694f5b1c8a1SJohn Marino */
695f5b1c8a1SJohn Marino
696f5b1c8a1SJohn Marino switch (state) {
697f5b1c8a1SJohn Marino case MIME_START:
698f5b1c8a1SJohn Marino if (c == ':') {
699f5b1c8a1SJohn Marino state = MIME_TYPE;
700f5b1c8a1SJohn Marino *p = 0;
701f5b1c8a1SJohn Marino ntmp = strip_ends(q);
702f5b1c8a1SJohn Marino q = p + 1;
703f5b1c8a1SJohn Marino }
704f5b1c8a1SJohn Marino break;
705f5b1c8a1SJohn Marino
706f5b1c8a1SJohn Marino case MIME_TYPE:
707f5b1c8a1SJohn Marino if (c == ';') {
708f5b1c8a1SJohn Marino mime_debug("Found End Value\n");
709f5b1c8a1SJohn Marino *p = 0;
710f5b1c8a1SJohn Marino mhdr = mime_hdr_new(ntmp,
711f5b1c8a1SJohn Marino strip_ends(q));
712f5b1c8a1SJohn Marino if (mhdr == NULL)
713f5b1c8a1SJohn Marino goto merr;
714f5b1c8a1SJohn Marino if (sk_MIME_HEADER_push(headers,
715f5b1c8a1SJohn Marino mhdr) == 0)
716f5b1c8a1SJohn Marino goto merr;
717f5b1c8a1SJohn Marino ntmp = NULL;
718f5b1c8a1SJohn Marino q = p + 1;
719f5b1c8a1SJohn Marino state = MIME_NAME;
720f5b1c8a1SJohn Marino } else if (c == '(') {
721f5b1c8a1SJohn Marino save_state = state;
722f5b1c8a1SJohn Marino state = MIME_COMMENT;
723f5b1c8a1SJohn Marino }
724f5b1c8a1SJohn Marino break;
725f5b1c8a1SJohn Marino
726f5b1c8a1SJohn Marino case MIME_COMMENT:
727f5b1c8a1SJohn Marino if (c == ')') {
728f5b1c8a1SJohn Marino state = save_state;
729f5b1c8a1SJohn Marino }
730f5b1c8a1SJohn Marino break;
731f5b1c8a1SJohn Marino
732f5b1c8a1SJohn Marino case MIME_NAME:
733f5b1c8a1SJohn Marino if (c == '=') {
734f5b1c8a1SJohn Marino state = MIME_VALUE;
735f5b1c8a1SJohn Marino *p = 0;
736f5b1c8a1SJohn Marino ntmp = strip_ends(q);
737f5b1c8a1SJohn Marino q = p + 1;
738f5b1c8a1SJohn Marino }
739f5b1c8a1SJohn Marino break;
740f5b1c8a1SJohn Marino
741f5b1c8a1SJohn Marino case MIME_VALUE:
742f5b1c8a1SJohn Marino if (c == ';') {
743f5b1c8a1SJohn Marino state = MIME_NAME;
744f5b1c8a1SJohn Marino *p = 0;
745f5b1c8a1SJohn Marino mime_hdr_addparam(mhdr, ntmp,
746f5b1c8a1SJohn Marino strip_ends(q));
747f5b1c8a1SJohn Marino ntmp = NULL;
748f5b1c8a1SJohn Marino q = p + 1;
749f5b1c8a1SJohn Marino } else if (c == '"') {
750f5b1c8a1SJohn Marino mime_debug("Found Quote\n");
751f5b1c8a1SJohn Marino state = MIME_QUOTE;
752f5b1c8a1SJohn Marino } else if (c == '(') {
753f5b1c8a1SJohn Marino save_state = state;
754f5b1c8a1SJohn Marino state = MIME_COMMENT;
755f5b1c8a1SJohn Marino }
756f5b1c8a1SJohn Marino break;
757f5b1c8a1SJohn Marino
758f5b1c8a1SJohn Marino case MIME_QUOTE:
759f5b1c8a1SJohn Marino if (c == '"') {
760f5b1c8a1SJohn Marino mime_debug("Found Match Quote\n");
761f5b1c8a1SJohn Marino state = MIME_VALUE;
762f5b1c8a1SJohn Marino }
763f5b1c8a1SJohn Marino break;
764f5b1c8a1SJohn Marino }
765f5b1c8a1SJohn Marino }
766f5b1c8a1SJohn Marino
767f5b1c8a1SJohn Marino if (state == MIME_TYPE) {
768f5b1c8a1SJohn Marino mhdr = mime_hdr_new(ntmp, strip_ends(q));
769f5b1c8a1SJohn Marino if (mhdr == NULL)
770f5b1c8a1SJohn Marino goto merr;
771f5b1c8a1SJohn Marino if (sk_MIME_HEADER_push(headers, mhdr) == 0)
772f5b1c8a1SJohn Marino goto merr;
773f5b1c8a1SJohn Marino } else if (state == MIME_VALUE)
774f5b1c8a1SJohn Marino mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
775f5b1c8a1SJohn Marino
776f5b1c8a1SJohn Marino if (p == linebuf)
777f5b1c8a1SJohn Marino break; /* Blank line means end of headers */
778f5b1c8a1SJohn Marino }
779f5b1c8a1SJohn Marino
780f5b1c8a1SJohn Marino return headers;
781f5b1c8a1SJohn Marino
782f5b1c8a1SJohn Marino merr:
783f5b1c8a1SJohn Marino if (mhdr != NULL)
784f5b1c8a1SJohn Marino mime_hdr_free(mhdr);
785f5b1c8a1SJohn Marino sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
786f5b1c8a1SJohn Marino return NULL;
787f5b1c8a1SJohn Marino }
788f5b1c8a1SJohn Marino
789f5b1c8a1SJohn Marino static char *
strip_ends(char * name)790f5b1c8a1SJohn Marino strip_ends(char *name)
791f5b1c8a1SJohn Marino {
792f5b1c8a1SJohn Marino return strip_end(strip_start(name));
793f5b1c8a1SJohn Marino }
794f5b1c8a1SJohn Marino
795f5b1c8a1SJohn Marino /* Strip a parameter of whitespace from start of param */
796f5b1c8a1SJohn Marino static char *
strip_start(char * name)797f5b1c8a1SJohn Marino strip_start(char *name)
798f5b1c8a1SJohn Marino {
799f5b1c8a1SJohn Marino char *p, c;
800f5b1c8a1SJohn Marino
801f5b1c8a1SJohn Marino /* Look for first non white space or quote */
802f5b1c8a1SJohn Marino for (p = name; (c = *p); p++) {
803f5b1c8a1SJohn Marino if (c == '"') {
804f5b1c8a1SJohn Marino /* Next char is start of string if non null */
805f5b1c8a1SJohn Marino if (p[1])
806f5b1c8a1SJohn Marino return p + 1;
807f5b1c8a1SJohn Marino /* Else null string */
808f5b1c8a1SJohn Marino return NULL;
809f5b1c8a1SJohn Marino }
810f5b1c8a1SJohn Marino if (!isspace((unsigned char)c))
811f5b1c8a1SJohn Marino return p;
812f5b1c8a1SJohn Marino }
813f5b1c8a1SJohn Marino return NULL;
814f5b1c8a1SJohn Marino }
815f5b1c8a1SJohn Marino
816f5b1c8a1SJohn Marino /* As above but strip from end of string : maybe should handle brackets? */
817f5b1c8a1SJohn Marino static char *
strip_end(char * name)818f5b1c8a1SJohn Marino strip_end(char *name)
819f5b1c8a1SJohn Marino {
820f5b1c8a1SJohn Marino char *p, c;
821f5b1c8a1SJohn Marino
822f5b1c8a1SJohn Marino if (!name)
823f5b1c8a1SJohn Marino return NULL;
824f5b1c8a1SJohn Marino
825f5b1c8a1SJohn Marino /* Look for first non white space or quote */
826f5b1c8a1SJohn Marino for (p = name + strlen(name) - 1; p >= name; p--) {
827f5b1c8a1SJohn Marino c = *p;
828f5b1c8a1SJohn Marino if (c == '"') {
829f5b1c8a1SJohn Marino if (p - 1 == name)
830f5b1c8a1SJohn Marino return NULL;
831f5b1c8a1SJohn Marino *p = 0;
832f5b1c8a1SJohn Marino return name;
833f5b1c8a1SJohn Marino }
834f5b1c8a1SJohn Marino if (isspace((unsigned char)c))
835f5b1c8a1SJohn Marino *p = 0;
836f5b1c8a1SJohn Marino else
837f5b1c8a1SJohn Marino return name;
838f5b1c8a1SJohn Marino }
839f5b1c8a1SJohn Marino return NULL;
840f5b1c8a1SJohn Marino }
841f5b1c8a1SJohn Marino
842f5b1c8a1SJohn Marino static MIME_HEADER *
mime_hdr_new(char * name,char * value)843f5b1c8a1SJohn Marino mime_hdr_new(char *name, char *value)
844f5b1c8a1SJohn Marino {
845f5b1c8a1SJohn Marino MIME_HEADER *mhdr;
846f5b1c8a1SJohn Marino char *tmpname = NULL, *tmpval = NULL, *p;
847f5b1c8a1SJohn Marino
848f5b1c8a1SJohn Marino if (name) {
849f5b1c8a1SJohn Marino if (!(tmpname = strdup(name)))
850f5b1c8a1SJohn Marino goto err;
851f5b1c8a1SJohn Marino for (p = tmpname; *p; p++)
852f5b1c8a1SJohn Marino *p = tolower((unsigned char)*p);
853f5b1c8a1SJohn Marino }
854f5b1c8a1SJohn Marino if (value) {
855f5b1c8a1SJohn Marino if (!(tmpval = strdup(value)))
856f5b1c8a1SJohn Marino goto err;
857f5b1c8a1SJohn Marino for (p = tmpval; *p; p++)
858f5b1c8a1SJohn Marino *p = tolower((unsigned char)*p);
859f5b1c8a1SJohn Marino }
860f5b1c8a1SJohn Marino mhdr = malloc(sizeof(MIME_HEADER));
861f5b1c8a1SJohn Marino if (!mhdr)
862f5b1c8a1SJohn Marino goto err;
863f5b1c8a1SJohn Marino mhdr->name = tmpname;
864f5b1c8a1SJohn Marino mhdr->value = tmpval;
865f5b1c8a1SJohn Marino if (!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp))) {
866f5b1c8a1SJohn Marino free(mhdr);
867f5b1c8a1SJohn Marino goto err;
868f5b1c8a1SJohn Marino }
869f5b1c8a1SJohn Marino return mhdr;
870f5b1c8a1SJohn Marino err:
871f5b1c8a1SJohn Marino free(tmpname);
872f5b1c8a1SJohn Marino free(tmpval);
873f5b1c8a1SJohn Marino return NULL;
874f5b1c8a1SJohn Marino }
875f5b1c8a1SJohn Marino
876f5b1c8a1SJohn Marino static int
mime_hdr_addparam(MIME_HEADER * mhdr,char * name,char * value)877f5b1c8a1SJohn Marino mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
878f5b1c8a1SJohn Marino {
879f5b1c8a1SJohn Marino char *tmpname = NULL, *tmpval = NULL, *p;
880f5b1c8a1SJohn Marino MIME_PARAM *mparam;
881f5b1c8a1SJohn Marino
882f5b1c8a1SJohn Marino if (name) {
883f5b1c8a1SJohn Marino tmpname = strdup(name);
884f5b1c8a1SJohn Marino if (!tmpname)
885f5b1c8a1SJohn Marino goto err;
886f5b1c8a1SJohn Marino for (p = tmpname; *p; p++)
887f5b1c8a1SJohn Marino *p = tolower((unsigned char)*p);
888f5b1c8a1SJohn Marino }
889f5b1c8a1SJohn Marino if (value) {
890f5b1c8a1SJohn Marino tmpval = strdup(value);
891f5b1c8a1SJohn Marino if (!tmpval)
892f5b1c8a1SJohn Marino goto err;
893f5b1c8a1SJohn Marino }
894f5b1c8a1SJohn Marino /* Parameter values are case sensitive so leave as is */
895f5b1c8a1SJohn Marino mparam = malloc(sizeof(MIME_PARAM));
896f5b1c8a1SJohn Marino if (!mparam)
897f5b1c8a1SJohn Marino goto err;
898f5b1c8a1SJohn Marino mparam->param_name = tmpname;
899f5b1c8a1SJohn Marino mparam->param_value = tmpval;
900f5b1c8a1SJohn Marino if (sk_MIME_PARAM_push(mhdr->params, mparam) == 0) {
901f5b1c8a1SJohn Marino free(mparam);
902f5b1c8a1SJohn Marino goto err;
903f5b1c8a1SJohn Marino }
904f5b1c8a1SJohn Marino return 1;
905f5b1c8a1SJohn Marino err:
906f5b1c8a1SJohn Marino free(tmpname);
907f5b1c8a1SJohn Marino free(tmpval);
908f5b1c8a1SJohn Marino return 0;
909f5b1c8a1SJohn Marino }
910f5b1c8a1SJohn Marino
911f5b1c8a1SJohn Marino static int
mime_hdr_cmp(const MIME_HEADER * const * a,const MIME_HEADER * const * b)912f5b1c8a1SJohn Marino mime_hdr_cmp(const MIME_HEADER * const *a, const MIME_HEADER * const *b)
913f5b1c8a1SJohn Marino {
914f5b1c8a1SJohn Marino if (!(*a)->name || !(*b)->name)
915f5b1c8a1SJohn Marino return !!(*a)->name - !!(*b)->name;
916f5b1c8a1SJohn Marino return (strcmp((*a)->name, (*b)->name));
917f5b1c8a1SJohn Marino }
918f5b1c8a1SJohn Marino
919f5b1c8a1SJohn Marino static int
mime_param_cmp(const MIME_PARAM * const * a,const MIME_PARAM * const * b)920f5b1c8a1SJohn Marino mime_param_cmp(const MIME_PARAM * const *a, const MIME_PARAM * const *b)
921f5b1c8a1SJohn Marino {
922f5b1c8a1SJohn Marino if (!(*a)->param_name || !(*b)->param_name)
923f5b1c8a1SJohn Marino return !!(*a)->param_name - !!(*b)->param_name;
924f5b1c8a1SJohn Marino return (strcmp((*a)->param_name, (*b)->param_name));
925f5b1c8a1SJohn Marino }
926f5b1c8a1SJohn Marino
927f5b1c8a1SJohn Marino /* Find a header with a given name (if possible) */
928f5b1c8a1SJohn Marino
929f5b1c8a1SJohn Marino static MIME_HEADER *
mime_hdr_find(STACK_OF (MIME_HEADER)* hdrs,char * name)930f5b1c8a1SJohn Marino mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
931f5b1c8a1SJohn Marino {
932f5b1c8a1SJohn Marino MIME_HEADER htmp;
933f5b1c8a1SJohn Marino int idx;
934f5b1c8a1SJohn Marino htmp.name = name;
935f5b1c8a1SJohn Marino idx = sk_MIME_HEADER_find(hdrs, &htmp);
936f5b1c8a1SJohn Marino if (idx < 0)
937f5b1c8a1SJohn Marino return NULL;
938f5b1c8a1SJohn Marino return sk_MIME_HEADER_value(hdrs, idx);
939f5b1c8a1SJohn Marino }
940f5b1c8a1SJohn Marino
941f5b1c8a1SJohn Marino static MIME_PARAM *
mime_param_find(MIME_HEADER * hdr,char * name)942f5b1c8a1SJohn Marino mime_param_find(MIME_HEADER *hdr, char *name)
943f5b1c8a1SJohn Marino {
944f5b1c8a1SJohn Marino MIME_PARAM param;
945f5b1c8a1SJohn Marino int idx;
946f5b1c8a1SJohn Marino param.param_name = name;
947f5b1c8a1SJohn Marino idx = sk_MIME_PARAM_find(hdr->params, ¶m);
948f5b1c8a1SJohn Marino if (idx < 0)
949f5b1c8a1SJohn Marino return NULL;
950f5b1c8a1SJohn Marino return sk_MIME_PARAM_value(hdr->params, idx);
951f5b1c8a1SJohn Marino }
952f5b1c8a1SJohn Marino
953f5b1c8a1SJohn Marino static void
mime_hdr_free(MIME_HEADER * hdr)954f5b1c8a1SJohn Marino mime_hdr_free(MIME_HEADER *hdr)
955f5b1c8a1SJohn Marino {
956f5b1c8a1SJohn Marino free(hdr->name);
957f5b1c8a1SJohn Marino free(hdr->value);
958f5b1c8a1SJohn Marino if (hdr->params)
959f5b1c8a1SJohn Marino sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
960f5b1c8a1SJohn Marino free(hdr);
961f5b1c8a1SJohn Marino }
962f5b1c8a1SJohn Marino
963f5b1c8a1SJohn Marino static void
mime_param_free(MIME_PARAM * param)964f5b1c8a1SJohn Marino mime_param_free(MIME_PARAM *param)
965f5b1c8a1SJohn Marino {
966f5b1c8a1SJohn Marino free(param->param_name);
967f5b1c8a1SJohn Marino free(param->param_value);
968f5b1c8a1SJohn Marino free(param);
969f5b1c8a1SJohn Marino }
970f5b1c8a1SJohn Marino
971f5b1c8a1SJohn Marino /* Check for a multipart boundary. Returns:
972f5b1c8a1SJohn Marino * 0 : no boundary
973f5b1c8a1SJohn Marino * 1 : part boundary
974f5b1c8a1SJohn Marino * 2 : final boundary
975f5b1c8a1SJohn Marino */
976f5b1c8a1SJohn Marino static int
mime_bound_check(char * line,int linelen,char * bound,int blen)977f5b1c8a1SJohn Marino mime_bound_check(char *line, int linelen, char *bound, int blen)
978f5b1c8a1SJohn Marino {
979f5b1c8a1SJohn Marino if (linelen == -1)
980f5b1c8a1SJohn Marino linelen = strlen(line);
981f5b1c8a1SJohn Marino if (blen == -1)
982f5b1c8a1SJohn Marino blen = strlen(bound);
983f5b1c8a1SJohn Marino /* Quickly eliminate if line length too short */
984f5b1c8a1SJohn Marino if (blen + 2 > linelen)
985f5b1c8a1SJohn Marino return 0;
986f5b1c8a1SJohn Marino /* Check for part boundary */
987f5b1c8a1SJohn Marino if (!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) {
988f5b1c8a1SJohn Marino if (!strncmp(line + blen + 2, "--", 2))
989f5b1c8a1SJohn Marino return 2;
990f5b1c8a1SJohn Marino else
991f5b1c8a1SJohn Marino return 1;
992f5b1c8a1SJohn Marino }
993f5b1c8a1SJohn Marino return 0;
994f5b1c8a1SJohn Marino }
995f5b1c8a1SJohn Marino
996f5b1c8a1SJohn Marino static int
strip_eol(char * linebuf,int * plen)997f5b1c8a1SJohn Marino strip_eol(char *linebuf, int *plen)
998f5b1c8a1SJohn Marino {
999f5b1c8a1SJohn Marino int len = *plen;
1000f5b1c8a1SJohn Marino char *p, c;
1001f5b1c8a1SJohn Marino int is_eol = 0;
1002f5b1c8a1SJohn Marino
1003f5b1c8a1SJohn Marino for (p = linebuf + len - 1; len > 0; len--, p--) {
1004f5b1c8a1SJohn Marino c = *p;
1005f5b1c8a1SJohn Marino if (c == '\n')
1006f5b1c8a1SJohn Marino is_eol = 1;
1007f5b1c8a1SJohn Marino else if (c != '\r')
1008f5b1c8a1SJohn Marino break;
1009f5b1c8a1SJohn Marino }
1010f5b1c8a1SJohn Marino *plen = len;
1011f5b1c8a1SJohn Marino return is_eol;
1012f5b1c8a1SJohn Marino }
1013