Annotation of embedaddon/curl/docs/examples/curlx.c, revision 1.1
1.1 ! misho 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 - 2019 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 - environment 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:
! 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 convenience routine to get an access URI. */
! 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 certificate. If found, this will become
! 187: the URL to be used in the POST.
! 188: */
! 189:
! 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: ok = X509_verify_cert(ctx);
! 199: if(ok && ctx->cert) {
! 200: unsigned char *accessinfo;
! 201: if(p->verbose > 1)
! 202: X509_print_ex(p->errorbio, ctx->cert, 0, 0);
! 203:
! 204: accessinfo = my_get_ext(ctx->cert, p->accesstype, NID_sinfo_access);
! 205: if(accessinfo) {
! 206: if(p->verbose)
! 207: BIO_printf(p->errorbio, "Setting URL from SIA to: %s\n", accessinfo);
! 208:
! 209: curl_easy_setopt(p->curl, CURLOPT_URL, accessinfo);
! 210: }
! 211: else if(accessinfo = my_get_ext(ctx->cert, p->accesstype,
! 212: NID_info_access)) {
! 213: if(p->verbose)
! 214: BIO_printf(p->errorbio, "Setting URL from AIA to: %s\n", accessinfo);
! 215:
! 216: curl_easy_setopt(p->curl, CURLOPT_URL, accessinfo);
! 217: }
! 218: }
! 219: if(p->verbose > 2)
! 220: BIO_printf(p->errorbio, "leaving ssl_app_verify_callback with %d\n", ok);
! 221:
! 222: return ok;
! 223: }
! 224:
! 225:
! 226: /* The SSL initialisation callback. The callback sets:
! 227: - a private key and certificate
! 228: - a trusted ca certificate
! 229: - a preferred cipherlist
! 230: - an application verification callback (the function above)
! 231: */
! 232:
! 233: static CURLcode sslctxfun(CURL *curl, void *sslctx, void *parm)
! 234: {
! 235: sslctxparm *p = (sslctxparm *) parm;
! 236: SSL_CTX *ctx = (SSL_CTX *) sslctx;
! 237:
! 238: if(!SSL_CTX_use_certificate(ctx, p->usercert)) {
! 239: BIO_printf(p->errorbio, "SSL_CTX_use_certificate problem\n");
! 240: goto err;
! 241: }
! 242: if(!SSL_CTX_use_PrivateKey(ctx, p->pkey)) {
! 243: BIO_printf(p->errorbio, "SSL_CTX_use_PrivateKey\n");
! 244: goto err;
! 245: }
! 246:
! 247: if(!SSL_CTX_check_private_key(ctx)) {
! 248: BIO_printf(p->errorbio, "SSL_CTX_check_private_key\n");
! 249: goto err;
! 250: }
! 251:
! 252: SSL_CTX_set_quiet_shutdown(ctx, 1);
! 253: SSL_CTX_set_cipher_list(ctx, "RC4-MD5");
! 254: SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
! 255:
! 256: X509_STORE_add_cert(SSL_CTX_get_cert_store(ctx),
! 257: sk_X509_value(p->ca, sk_X509_num(p->ca)-1));
! 258:
! 259: SSL_CTX_set_verify_depth(ctx, 2);
! 260: SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, ZERO_NULL);
! 261: SSL_CTX_set_cert_verify_callback(ctx, ssl_app_verify_callback, parm);
! 262:
! 263: return CURLE_OK;
! 264: err:
! 265: ERR_print_errors(p->errorbio);
! 266: return CURLE_SSL_CERTPROBLEM;
! 267:
! 268: }
! 269:
! 270: int main(int argc, char **argv)
! 271: {
! 272: BIO* in = NULL;
! 273: BIO* out = NULL;
! 274:
! 275: char *outfile = NULL;
! 276: char *infile = NULL;
! 277:
! 278: int tabLength = 100;
! 279: char *binaryptr;
! 280: char *mimetype = NULL;
! 281: char *mimetypeaccept = NULL;
! 282: char *contenttype;
! 283: const char **pp;
! 284: unsigned char *hostporturl = NULL;
! 285: BIO *p12bio;
! 286: char **args = argv + 1;
! 287: unsigned char *serverurl;
! 288: sslctxparm p;
! 289: char *response;
! 290:
! 291: CURLcode res;
! 292: struct curl_slist *headers = NULL;
! 293: int badarg = 0;
! 294:
! 295: binaryptr = malloc(tabLength);
! 296:
! 297: memset(&p, '\0', sizeof(p));
! 298: p.errorbio = BIO_new_fp(stderr, BIO_NOCLOSE);
! 299:
! 300: curl_global_init(CURL_GLOBAL_DEFAULT);
! 301:
! 302: /* we need some more for the P12 decoding */
! 303:
! 304: OpenSSL_add_all_ciphers();
! 305: OpenSSL_add_all_digests();
! 306: ERR_load_crypto_strings();
! 307:
! 308: while(*args && *args[0] == '-') {
! 309: if(!strcmp (*args, "-in")) {
! 310: if(args[1]) {
! 311: infile = *(++args);
! 312: }
! 313: else
! 314: badarg = 1;
! 315: }
! 316: else if(!strcmp (*args, "-out")) {
! 317: if(args[1]) {
! 318: outfile = *(++args);
! 319: }
! 320: else
! 321: badarg = 1;
! 322: }
! 323: else if(!strcmp (*args, "-p12")) {
! 324: if(args[1]) {
! 325: p.p12file = *(++args);
! 326: }
! 327: else
! 328: badarg = 1;
! 329: }
! 330: else if(strcmp(*args, "-envpass") == 0) {
! 331: if(args[1]) {
! 332: p.pst = getenv(*(++args));
! 333: }
! 334: else
! 335: badarg = 1;
! 336: }
! 337: else if(strcmp(*args, "-connect") == 0) {
! 338: if(args[1]) {
! 339: hostporturl = *(++args);
! 340: }
! 341: else
! 342: badarg = 1;
! 343: }
! 344: else if(strcmp(*args, "-mimetype") == 0) {
! 345: if(args[1]) {
! 346: mimetype = *(++args);
! 347: }
! 348: else
! 349: badarg = 1;
! 350: }
! 351: else if(strcmp(*args, "-acceptmime") == 0) {
! 352: if(args[1]) {
! 353: mimetypeaccept = *(++args);
! 354: }
! 355: else
! 356: badarg = 1;
! 357: }
! 358: else if(strcmp(*args, "-accesstype") == 0) {
! 359: if(args[1]) {
! 360: p.accesstype = OBJ_obj2nid(OBJ_txt2obj(*++args, 0));
! 361: if(p.accesstype == 0)
! 362: badarg = 1;
! 363: }
! 364: else
! 365: badarg = 1;
! 366: }
! 367: else if(strcmp(*args, "-verbose") == 0) {
! 368: p.verbose++;
! 369: }
! 370: else
! 371: badarg = 1;
! 372: args++;
! 373: }
! 374:
! 375: if(mimetype == NULL || mimetypeaccept == NULL || p.p12file == NULL)
! 376: badarg = 1;
! 377:
! 378: if(badarg) {
! 379: for(pp = curlx_usage; (*pp != NULL); pp++)
! 380: BIO_printf(p.errorbio, "%s\n", *pp);
! 381: BIO_printf(p.errorbio, "\n");
! 382: goto err;
! 383: }
! 384:
! 385: /* set input */
! 386:
! 387: in = BIO_new(BIO_s_file());
! 388: if(in == NULL) {
! 389: BIO_printf(p.errorbio, "Error setting input bio\n");
! 390: goto err;
! 391: }
! 392: else if(infile == NULL)
! 393: BIO_set_fp(in, stdin, BIO_NOCLOSE|BIO_FP_TEXT);
! 394: else if(BIO_read_filename(in, infile) <= 0) {
! 395: BIO_printf(p.errorbio, "Error opening input file %s\n", infile);
! 396: BIO_free(in);
! 397: goto err;
! 398: }
! 399:
! 400: /* set output */
! 401:
! 402: out = BIO_new(BIO_s_file());
! 403: if(out == NULL) {
! 404: BIO_printf(p.errorbio, "Error setting output bio.\n");
! 405: goto err;
! 406: }
! 407: else if(outfile == NULL)
! 408: BIO_set_fp(out, stdout, BIO_NOCLOSE|BIO_FP_TEXT);
! 409: else if(BIO_write_filename(out, outfile) <= 0) {
! 410: BIO_printf(p.errorbio, "Error opening output file %s\n", outfile);
! 411: BIO_free(out);
! 412: goto err;
! 413: }
! 414:
! 415:
! 416: p.errorbio = BIO_new_fp(stderr, BIO_NOCLOSE);
! 417:
! 418: p.curl = curl_easy_init();
! 419: if(!p.curl) {
! 420: BIO_printf(p.errorbio, "Cannot init curl lib\n");
! 421: goto err;
! 422: }
! 423:
! 424: p12bio = BIO_new_file(p.p12file, "rb");
! 425: if(!p12bio) {
! 426: BIO_printf(p.errorbio, "Error opening P12 file %s\n", p.p12file);
! 427: goto err;
! 428: }
! 429: p.p12 = d2i_PKCS12_bio(p12bio, NULL);
! 430: if(!p.p12) {
! 431: BIO_printf(p.errorbio, "Cannot decode P12 structure %s\n", p.p12file);
! 432: goto err;
! 433: }
! 434:
! 435: p.ca = NULL;
! 436: if(!(PKCS12_parse (p.p12, p.pst, &(p.pkey), &(p.usercert), &(p.ca) ) )) {
! 437: BIO_printf(p.errorbio, "Invalid P12 structure in %s\n", p.p12file);
! 438: goto err;
! 439: }
! 440:
! 441: if(sk_X509_num(p.ca) <= 0) {
! 442: BIO_printf(p.errorbio, "No trustworthy CA given.%s\n", p.p12file);
! 443: goto err;
! 444: }
! 445:
! 446: if(p.verbose > 1)
! 447: X509_print_ex(p.errorbio, p.usercert, 0, 0);
! 448:
! 449: /* determine URL to go */
! 450:
! 451: if(hostporturl) {
! 452: size_t len = strlen(hostporturl) + 9;
! 453: serverurl = malloc(len);
! 454: snprintf(serverurl, len, "https://%s", hostporturl);
! 455: }
! 456: else if(p.accesstype != 0) { /* see whether we can find an AIA or SIA for a
! 457: given access type */
! 458: serverurl = my_get_ext(p.usercert, p.accesstype, NID_info_access);
! 459: if(!serverurl) {
! 460: int j = 0;
! 461: BIO_printf(p.errorbio, "no service URL in user cert "
! 462: "cherching in others certificats\n");
! 463: for(j = 0; j<sk_X509_num(p.ca); j++) {
! 464: serverurl = my_get_ext(sk_X509_value(p.ca, j), p.accesstype,
! 465: NID_info_access);
! 466: if(serverurl)
! 467: break;
! 468: serverurl = my_get_ext(sk_X509_value(p.ca, j), p.accesstype,
! 469: NID_sinfo_access);
! 470: if(serverurl)
! 471: break;
! 472: }
! 473: }
! 474: }
! 475:
! 476: if(!serverurl) {
! 477: BIO_printf(p.errorbio, "no service URL in certificats,"
! 478: " check '-accesstype (AD_DVCS | ad_timestamping)'"
! 479: " or use '-connect'\n");
! 480: goto err;
! 481: }
! 482:
! 483: if(p.verbose)
! 484: BIO_printf(p.errorbio, "Service URL: <%s>\n", serverurl);
! 485:
! 486: curl_easy_setopt(p.curl, CURLOPT_URL, serverurl);
! 487:
! 488: /* Now specify the POST binary data */
! 489:
! 490: curl_easy_setopt(p.curl, CURLOPT_POSTFIELDS, binaryptr);
! 491: curl_easy_setopt(p.curl, CURLOPT_POSTFIELDSIZE, (long)tabLength);
! 492:
! 493: /* pass our list of custom made headers */
! 494:
! 495: contenttype = malloc(15 + strlen(mimetype));
! 496: snprintf(contenttype, 15 + strlen(mimetype), "Content-type: %s", mimetype);
! 497: headers = curl_slist_append(headers, contenttype);
! 498: curl_easy_setopt(p.curl, CURLOPT_HTTPHEADER, headers);
! 499:
! 500: if(p.verbose)
! 501: BIO_printf(p.errorbio, "Service URL: <%s>\n", serverurl);
! 502:
! 503: {
! 504: FILE *outfp;
! 505: BIO_get_fp(out, &outfp);
! 506: curl_easy_setopt(p.curl, CURLOPT_WRITEDATA, outfp);
! 507: }
! 508:
! 509: res = curl_easy_setopt(p.curl, CURLOPT_SSL_CTX_FUNCTION, sslctxfun);
! 510:
! 511: if(res != CURLE_OK)
! 512: BIO_printf(p.errorbio, "%d %s=%d %d\n", __LINE__,
! 513: "CURLOPT_SSL_CTX_FUNCTION", CURLOPT_SSL_CTX_FUNCTION, res);
! 514:
! 515: curl_easy_setopt(p.curl, CURLOPT_SSL_CTX_DATA, &p);
! 516:
! 517: {
! 518: char *ptr;
! 519: int lu; int i = 0;
! 520: while((lu = BIO_read(in, &binaryptr[i], tabLength-i)) >0) {
! 521: i += lu;
! 522: if(i == tabLength) {
! 523: tabLength += 100;
! 524: ptr = realloc(binaryptr, tabLength); /* should be more careful */
! 525: if(!ptr) {
! 526: /* out of memory */
! 527: BIO_printf(p.errorbio, "out of memory (realloc returned NULL)\n");
! 528: goto fail;
! 529: }
! 530: binaryptr = ptr;
! 531: ptr = NULL;
! 532: }
! 533: }
! 534: tabLength = i;
! 535: }
! 536: /* Now specify the POST binary data */
! 537:
! 538: curl_easy_setopt(p.curl, CURLOPT_POSTFIELDS, binaryptr);
! 539: curl_easy_setopt(p.curl, CURLOPT_POSTFIELDSIZE, (long)tabLength);
! 540:
! 541:
! 542: /* Perform the request, res will get the return code */
! 543:
! 544: BIO_printf(p.errorbio, "%d %s %d\n", __LINE__, "curl_easy_perform",
! 545: res = curl_easy_perform(p.curl));
! 546: {
! 547: curl_easy_getinfo(p.curl, CURLINFO_CONTENT_TYPE, &response);
! 548: if(mimetypeaccept && p.verbose) {
! 549: if(!strcmp(mimetypeaccept, response))
! 550: BIO_printf(p.errorbio, "the response has a correct mimetype : %s\n",
! 551: response);
! 552: else
! 553: BIO_printf(p.errorbio, "the response doesn\'t have an acceptable "
! 554: "mime type, it is %s instead of %s\n",
! 555: response, mimetypeaccept);
! 556: }
! 557: }
! 558:
! 559: /*** code d'erreur si accept mime ***, egalement code return HTTP != 200 ***/
! 560:
! 561: /* free the header list*/
! 562: fail:
! 563: curl_slist_free_all(headers);
! 564:
! 565: /* always cleanup */
! 566: curl_easy_cleanup(p.curl);
! 567:
! 568: BIO_free(in);
! 569: BIO_free(out);
! 570: return (EXIT_SUCCESS);
! 571:
! 572: err: BIO_printf(p.errorbio, "error");
! 573: exit(1);
! 574: }
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