1 /*
2 curlx.c Authors: Peter Sylvester, Jean-Paul Merlin
3
4 This is a little program to demonstrate the usage of
5
6 - an ssl initialisation callback setting a user key and trustbases
7 coming from a pkcs12 file
8 - using an ssl application callback to find a URI in the
9 certificate presented during ssl session establishment.
10
11 */
12 /* <DESC>
13 * demonstrates use of SSL context callback, requires OpenSSL
14 * </DESC>
15 */
16
17 /*
18 * Copyright (c) 2003 The OpenEvidence Project. All rights reserved.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions, the following disclaimer,
26 * and the original OpenSSL and SSLeay Licences below.
27 *
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions, the following disclaimer
30 * and the original OpenSSL and SSLeay Licences below in
31 * the documentation and/or other materials provided with the
32 * distribution.
33 *
34 * 3. All advertising materials mentioning features or use of this
35 * software must display the following acknowledgments:
36 * "This product includes software developed by the Openevidence Project
37 * for use in the OpenEvidence Toolkit. (http://www.openevidence.org/)"
38 * This product includes software developed by the OpenSSL Project
39 * for use in the OpenSSL Toolkit (https://www.openssl.org/)"
40 * This product includes cryptographic software written by Eric Young
41 * (eay@cryptsoft.com). This product includes software written by Tim
42 * Hudson (tjh@cryptsoft.com)."
43 *
44 * 4. The names "OpenEvidence Toolkit" and "OpenEvidence Project" must not be
45 * used to endorse or promote products derived from this software without
46 * prior written permission. For written permission, please contact
47 * openevidence-core@openevidence.org.
48 *
49 * 5. Products derived from this software may not be called "OpenEvidence"
50 * nor may "OpenEvidence" appear in their names without prior written
51 * permission of the OpenEvidence Project.
52 *
53 * 6. Redistributions of any form whatsoever must retain the following
54 * acknowledgments:
55 * "This product includes software developed by the OpenEvidence Project
56 * for use in the OpenEvidence Toolkit (http://www.openevidence.org/)
57 * This product includes software developed by the OpenSSL Project
58 * for use in the OpenSSL Toolkit (https://www.openssl.org/)"
59 * This product includes cryptographic software written by Eric Young
60 * (eay@cryptsoft.com). This product includes software written by Tim
61 * Hudson (tjh@cryptsoft.com)."
62 *
63 * THIS SOFTWARE IS PROVIDED BY THE OpenEvidence PROJECT ``AS IS'' AND ANY
64 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
66 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenEvidence PROJECT OR
67 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
68 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
69 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
70 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
72 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
73 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
74 * OF THE POSSIBILITY OF SUCH DAMAGE.
75 * ====================================================================
76 *
77 * This product includes software developed by the OpenSSL Project
78 * for use in the OpenSSL Toolkit (https://www.openssl.org/)
79 * This product includes cryptographic software written by Eric Young
80 * (eay@cryptsoft.com). This product includes software written by Tim
81 * Hudson (tjh@cryptsoft.com).
82 *
83 */
84
85 #include <stdio.h>
86 #include <stdlib.h>
87 #include <string.h>
88 #include <curl/curl.h>
89 #include <openssl/x509v3.h>
90 #include <openssl/x509_vfy.h>
91 #include <openssl/crypto.h>
92 #include <openssl/lhash.h>
93 #include <openssl/objects.h>
94 #include <openssl/err.h>
95 #include <openssl/evp.h>
96 #include <openssl/x509.h>
97 #include <openssl/pkcs12.h>
98 #include <openssl/bio.h>
99 #include <openssl/ssl.h>
100
101 static const char *curlx_usage[]={
102 "usage: curlx args\n",
103 " -p12 arg - tia file ",
104 " -envpass arg - environement variable which content the tia private"
105 " key password",
106 " -out arg - output file (response)- default stdout",
107 " -in arg - input file (request)- default stdin",
108 " -connect arg - URL of the server for the connection ex:"
109 " www.openevidence.org",
110 " -mimetype arg - MIME type for data in ex : application/timestamp-query"
111 " or application/dvcs -default application/timestamp-query",
112 " -acceptmime arg - MIME type acceptable for the response ex : "
113 "application/timestamp-response or application/dvcs -default none",
114 " -accesstype arg - an Object identifier in an AIA/SIA method, e.g."
115 " AD_DVCS or ad_timestamping",
116 NULL
117 };
118
119 /*
120
121 ./curlx -p12 psy.p12 -envpass XX -in request -verbose -accesstype AD_DVCS
122 -mimetype application/dvcs -acceptmime application/dvcs -out response
123
124 */
125
126 /*
127 * We use this ZERO_NULL to avoid picky compiler warnings,
128 * when assigning a NULL pointer to a function pointer var.
129 */
130
131 #define ZERO_NULL 0
132
133 /* This is a context that we pass to all callbacks */
134
135 typedef struct sslctxparm_st {
136 unsigned char *p12file;
137 const char *pst;
138 PKCS12 *p12;
139 EVP_PKEY *pkey;
140 X509 *usercert;
141 STACK_OF(X509) * ca;
142 CURL *curl;
143 BIO *errorbio;
144 int accesstype;
145 int verbose;
146
147 } sslctxparm;
148
149 /* some helper function. */
150
ia5string(ASN1_IA5STRING * ia5)151 static char *ia5string(ASN1_IA5STRING *ia5)
152 {
153 char *tmp;
154 if(!ia5 || !ia5->length)
155 return NULL;
156 tmp = OPENSSL_malloc(ia5->length + 1);
157 memcpy(tmp, ia5->data, ia5->length);
158 tmp[ia5->length] = 0;
159 return tmp;
160 }
161
162 /* A conveniance routine to get an access URI. */
my_get_ext(X509 * cert,const int type,int extensiontype)163 static unsigned char *my_get_ext(X509 *cert, const int type,
164 int extensiontype)
165 {
166 int i;
167 STACK_OF(ACCESS_DESCRIPTION) * accessinfo;
168 accessinfo = X509_get_ext_d2i(cert, extensiontype, NULL, NULL);
169
170 if(!sk_ACCESS_DESCRIPTION_num(accessinfo))
171 return NULL;
172 for(i = 0; i < sk_ACCESS_DESCRIPTION_num(accessinfo); i++) {
173 ACCESS_DESCRIPTION * ad = sk_ACCESS_DESCRIPTION_value(accessinfo, i);
174 if(OBJ_obj2nid(ad->method) == type) {
175 if(ad->location->type == GEN_URI) {
176 return ia5string(ad->location->d.ia5);
177 }
178 return NULL;
179 }
180 }
181 return NULL;
182 }
183
184 /* This is an application verification call back, it does not
185 perform any addition verification but tries to find a URL
186 in the presented certificat. If found, this will become
187 the URL to be used in the POST.
188 */
189
ssl_app_verify_callback(X509_STORE_CTX * ctx,void * arg)190 static int ssl_app_verify_callback(X509_STORE_CTX *ctx, void *arg)
191 {
192 sslctxparm * p = (sslctxparm *) arg;
193 int ok;
194
195 if(p->verbose > 2)
196 BIO_printf(p->errorbio, "entering ssl_app_verify_callback\n");
197
198 if((ok= X509_verify_cert(ctx)) && ctx->cert) {
199 unsigned char *accessinfo;
200 if(p->verbose > 1)
201 X509_print_ex(p->errorbio, ctx->cert, 0, 0);
202
203 if(accessinfo = my_get_ext(ctx->cert, p->accesstype, NID_sinfo_access)) {
204 if(p->verbose)
205 BIO_printf(p->errorbio, "Setting URL from SIA to: %s\n", accessinfo);
206
207 curl_easy_setopt(p->curl, CURLOPT_URL, accessinfo);
208 }
209 else if(accessinfo = my_get_ext(ctx->cert, p->accesstype,
210 NID_info_access)) {
211 if(p->verbose)
212 BIO_printf(p->errorbio, "Setting URL from AIA to: %s\n", accessinfo);
213
214 curl_easy_setopt(p->curl, CURLOPT_URL, accessinfo);
215 }
216 }
217 if(p->verbose > 2)
218 BIO_printf(p->errorbio, "leaving ssl_app_verify_callback with %d\n", ok);
219
220 return ok;
221 }
222
223
224 /* The SSL initialisation callback. The callback sets:
225 - a private key and certificate
226 - a trusted ca certificate
227 - a preferred cipherlist
228 - an application verification callback (the function above)
229 */
230
sslctxfun(CURL * curl,void * sslctx,void * parm)231 static CURLcode sslctxfun(CURL *curl, void *sslctx, void *parm)
232 {
233 sslctxparm *p = (sslctxparm *) parm;
234 SSL_CTX *ctx = (SSL_CTX *) sslctx;
235
236 if(!SSL_CTX_use_certificate(ctx, p->usercert)) {
237 BIO_printf(p->errorbio, "SSL_CTX_use_certificate problem\n");
238 goto err;
239 }
240 if(!SSL_CTX_use_PrivateKey(ctx, p->pkey)) {
241 BIO_printf(p->errorbio, "SSL_CTX_use_PrivateKey\n");
242 goto err;
243 }
244
245 if(!SSL_CTX_check_private_key(ctx)) {
246 BIO_printf(p->errorbio, "SSL_CTX_check_private_key\n");
247 goto err;
248 }
249
250 SSL_CTX_set_quiet_shutdown(ctx, 1);
251 SSL_CTX_set_cipher_list(ctx, "RC4-MD5");
252 SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
253
254 X509_STORE_add_cert(SSL_CTX_get_cert_store(ctx),
255 sk_X509_value(p->ca, sk_X509_num(p->ca)-1));
256
257 SSL_CTX_set_verify_depth(ctx, 2);
258 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, ZERO_NULL);
259 SSL_CTX_set_cert_verify_callback(ctx, ssl_app_verify_callback, parm);
260
261 return CURLE_OK;
262 err:
263 ERR_print_errors(p->errorbio);
264 return CURLE_SSL_CERTPROBLEM;
265
266 }
267
main(int argc,char ** argv)268 int main(int argc, char **argv)
269 {
270 BIO* in=NULL;
271 BIO* out=NULL;
272
273 char *outfile = NULL;
274 char *infile = NULL;
275
276 int tabLength=100;
277 char *binaryptr;
278 char *mimetype;
279 char *mimetypeaccept=NULL;
280 char *contenttype;
281 const char **pp;
282 unsigned char *hostporturl = NULL;
283 BIO *p12bio;
284 char **args = argv + 1;
285 unsigned char *serverurl;
286 sslctxparm p;
287 char *response;
288
289 CURLcode res;
290 struct curl_slist *headers=NULL;
291 int badarg=0;
292
293 binaryptr = malloc(tabLength);
294
295 p.verbose = 0;
296 p.errorbio = BIO_new_fp (stderr, BIO_NOCLOSE);
297
298 curl_global_init(CURL_GLOBAL_DEFAULT);
299
300 /* we need some more for the P12 decoding */
301
302 OpenSSL_add_all_ciphers();
303 OpenSSL_add_all_digests();
304 ERR_load_crypto_strings();
305
306 while(*args && *args[0] == '-') {
307 if(!strcmp (*args, "-in")) {
308 if(args[1]) {
309 infile=*(++args);
310 }
311 else
312 badarg=1;
313 }
314 else if(!strcmp (*args, "-out")) {
315 if(args[1]) {
316 outfile=*(++args);
317 }
318 else
319 badarg=1;
320 }
321 else if(!strcmp (*args, "-p12")) {
322 if(args[1]) {
323 p.p12file = *(++args);
324 }
325 else
326 badarg=1;
327 }
328 else if(strcmp(*args, "-envpass") == 0) {
329 if(args[1]) {
330 p.pst = getenv(*(++args));
331 }
332 else
333 badarg=1;
334 }
335 else if(strcmp(*args, "-connect") == 0) {
336 if(args[1]) {
337 hostporturl = *(++args);
338 }
339 else
340 badarg=1;
341 }
342 else if(strcmp(*args, "-mimetype") == 0) {
343 if(args[1]) {
344 mimetype = *(++args);
345 }
346 else
347 badarg=1;
348 }
349 else if(strcmp(*args, "-acceptmime") == 0) {
350 if(args[1]) {
351 mimetypeaccept = *(++args);
352 }
353 else
354 badarg=1;
355 }
356 else if(strcmp(*args, "-accesstype") == 0) {
357 if(args[1]) {
358 if((p.accesstype = OBJ_obj2nid(OBJ_txt2obj(*++args, 0))) == 0)
359 badarg=1;
360 }
361 else
362 badarg=1;
363 }
364 else if(strcmp(*args, "-verbose") == 0) {
365 p.verbose++;
366 }
367 else
368 badarg=1;
369 args++;
370 }
371
372 if(mimetype==NULL || mimetypeaccept == NULL)
373 badarg = 1;
374
375 if(badarg) {
376 for(pp=curlx_usage; (*pp != NULL); pp++)
377 BIO_printf(p.errorbio, "%s\n", *pp);
378 BIO_printf(p.errorbio, "\n");
379 goto err;
380 }
381
382 /* set input */
383
384 if((in=BIO_new(BIO_s_file())) == NULL) {
385 BIO_printf(p.errorbio, "Error setting input bio\n");
386 goto err;
387 }
388 else if(infile == NULL)
389 BIO_set_fp(in, stdin, BIO_NOCLOSE|BIO_FP_TEXT);
390 else if(BIO_read_filename(in, infile) <= 0) {
391 BIO_printf(p.errorbio, "Error opening input file %s\n", infile);
392 BIO_free(in);
393 goto err;
394 }
395
396 /* set output */
397
398 if((out=BIO_new(BIO_s_file())) == NULL) {
399 BIO_printf(p.errorbio, "Error setting output bio.\n");
400 goto err;
401 }
402 else if(outfile == NULL)
403 BIO_set_fp(out, stdout, BIO_NOCLOSE|BIO_FP_TEXT);
404 else if(BIO_write_filename(out, outfile) <= 0) {
405 BIO_printf(p.errorbio, "Error opening output file %s\n", outfile);
406 BIO_free(out);
407 goto err;
408 }
409
410
411 p.errorbio = BIO_new_fp (stderr, BIO_NOCLOSE);
412
413 if(!(p.curl = curl_easy_init())) {
414 BIO_printf(p.errorbio, "Cannot init curl lib\n");
415 goto err;
416 }
417
418 if(!(p12bio = BIO_new_file(p.p12file, "rb"))) {
419 BIO_printf(p.errorbio, "Error opening P12 file %s\n", p.p12file);
420 goto err;
421 }
422 if(!(p.p12 = d2i_PKCS12_bio (p12bio, NULL))) {
423 BIO_printf(p.errorbio, "Cannot decode P12 structure %s\n", p.p12file);
424 goto err;
425 }
426
427 p.ca= NULL;
428 if(!(PKCS12_parse (p.p12, p.pst, &(p.pkey), &(p.usercert), &(p.ca) ) )) {
429 BIO_printf(p.errorbio, "Invalid P12 structure in %s\n", p.p12file);
430 goto err;
431 }
432
433 if(sk_X509_num(p.ca) <= 0) {
434 BIO_printf(p.errorbio, "No trustworthy CA given.%s\n", p.p12file);
435 goto err;
436 }
437
438 if(p.verbose > 1)
439 X509_print_ex(p.errorbio, p.usercert, 0, 0);
440
441 /* determine URL to go */
442
443 if(hostporturl) {
444 size_t len = strlen(hostporturl) + 9;
445 serverurl = malloc(len);
446 snprintf(serverurl, len, "https://%s", hostporturl);
447 }
448 else if(p.accesstype != 0) { /* see whether we can find an AIA or SIA for a
449 given access type */
450 if(!(serverurl = my_get_ext(p.usercert, p.accesstype, NID_info_access))) {
451 int j=0;
452 BIO_printf(p.errorbio, "no service URL in user cert "
453 "cherching in others certificats\n");
454 for(j=0; j<sk_X509_num(p.ca); j++) {
455 if((serverurl = my_get_ext(sk_X509_value(p.ca, j), p.accesstype,
456 NID_info_access)))
457 break;
458 if((serverurl = my_get_ext(sk_X509_value(p.ca, j), p.accesstype,
459 NID_sinfo_access)))
460 break;
461 }
462 }
463 }
464
465 if(!serverurl) {
466 BIO_printf(p.errorbio, "no service URL in certificats,"
467 " check '-accesstype (AD_DVCS | ad_timestamping)'"
468 " or use '-connect'\n");
469 goto err;
470 }
471
472 if(p.verbose)
473 BIO_printf(p.errorbio, "Service URL: <%s>\n", serverurl);
474
475 curl_easy_setopt(p.curl, CURLOPT_URL, serverurl);
476
477 /* Now specify the POST binary data */
478
479 curl_easy_setopt(p.curl, CURLOPT_POSTFIELDS, binaryptr);
480 curl_easy_setopt(p.curl, CURLOPT_POSTFIELDSIZE, (long)tabLength);
481
482 /* pass our list of custom made headers */
483
484 contenttype = malloc(15+strlen(mimetype));
485 snprintf(contenttype, 15+strlen(mimetype), "Content-type: %s", mimetype);
486 headers = curl_slist_append(headers, contenttype);
487 curl_easy_setopt(p.curl, CURLOPT_HTTPHEADER, headers);
488
489 if(p.verbose)
490 BIO_printf(p.errorbio, "Service URL: <%s>\n", serverurl);
491
492 {
493 FILE *outfp;
494 BIO_get_fp(out, &outfp);
495 curl_easy_setopt(p.curl, CURLOPT_WRITEDATA, outfp);
496 }
497
498 res = curl_easy_setopt(p.curl, CURLOPT_SSL_CTX_FUNCTION, sslctxfun);
499
500 if(res != CURLE_OK)
501 BIO_printf(p.errorbio, "%d %s=%d %d\n", __LINE__,
502 "CURLOPT_SSL_CTX_FUNCTION", CURLOPT_SSL_CTX_FUNCTION, res);
503
504 curl_easy_setopt(p.curl, CURLOPT_SSL_CTX_DATA, &p);
505
506 {
507 int lu; int i=0;
508 while((lu = BIO_read (in, &binaryptr[i], tabLength-i)) >0) {
509 i+=lu;
510 if(i== tabLength) {
511 tabLength+=100;
512 binaryptr=realloc(binaryptr, tabLength); /* should be more careful */
513 }
514 }
515 tabLength = i;
516 }
517 /* Now specify the POST binary data */
518
519 curl_easy_setopt(p.curl, CURLOPT_POSTFIELDS, binaryptr);
520 curl_easy_setopt(p.curl, CURLOPT_POSTFIELDSIZE, (long)tabLength);
521
522
523 /* Perform the request, res will get the return code */
524
525 BIO_printf(p.errorbio, "%d %s %d\n", __LINE__, "curl_easy_perform",
526 res = curl_easy_perform(p.curl));
527 {
528 int result =curl_easy_getinfo(p.curl, CURLINFO_CONTENT_TYPE, &response);
529 if(mimetypeaccept && p.verbose)
530 if(!strcmp(mimetypeaccept, response))
531 BIO_printf(p.errorbio, "the response has a correct mimetype : %s\n",
532 response);
533 else
534 BIO_printf(p.errorbio, "the response doesn\'t have an acceptable "
535 "mime type, it is %s instead of %s\n",
536 response, mimetypeaccept);
537 }
538
539 /*** code d'erreur si accept mime ***, egalement code return HTTP != 200 ***/
540
541 /* free the header list*/
542
543 curl_slist_free_all(headers);
544
545 /* always cleanup */
546 curl_easy_cleanup(p.curl);
547
548 BIO_free(in);
549 BIO_free(out);
550 return (EXIT_SUCCESS);
551
552 err: BIO_printf(p.errorbio, "error");
553 exit(1);
554 }
555