1/*
2 * Copyright 2001-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <openssl/opensslconf.h>
11
12#ifdef OPENSSL_SYS_VMS
13  /* So fd_set and friends get properly defined on OpenVMS */
14# define _XOPEN_SOURCE_EXTENDED
15#endif
16
17#include <stdio.h>
18#include <stdlib.h>
19#include <string.h>
20#include <time.h>
21#include <ctype.h>
22
23/* Needs to be included before the openssl headers */
24#include "apps.h"
25#include "http_server.h"
26#include "progs.h"
27#include "internal/sockets.h"
28#include <openssl/e_os2.h>
29#include <openssl/crypto.h>
30#include <openssl/err.h>
31#include <openssl/ssl.h>
32#include <openssl/evp.h>
33#include <openssl/bn.h>
34#include <openssl/x509v3.h>
35
36#if defined(__TANDEM)
37# if defined(OPENSSL_TANDEM_FLOSS)
38#  include <floss.h(floss_fork)>
39# endif
40#endif
41
42#if defined(OPENSSL_SYS_VXWORKS)
43/* not supported */
44int setpgid(pid_t pid, pid_t pgid)
45{
46    errno = ENOSYS;
47    return 0;
48}
49/* not supported */
50pid_t fork(void)
51{
52    errno = ENOSYS;
53    return (pid_t) -1;
54}
55#endif
56/* Maximum leeway in validity period: default 5 minutes */
57#define MAX_VALIDITY_PERIOD    (5 * 60)
58
59static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
60                         const EVP_MD *cert_id_md, X509 *issuer,
61                         STACK_OF(OCSP_CERTID) *ids);
62static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
63                           const EVP_MD *cert_id_md, X509 *issuer,
64                           STACK_OF(OCSP_CERTID) *ids);
65static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
66                              STACK_OF(OPENSSL_STRING) *names,
67                              STACK_OF(OCSP_CERTID) *ids, long nsec,
68                              long maxage);
69static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
70                              CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
71                              EVP_PKEY *rkey, const EVP_MD *md,
72                              STACK_OF(OPENSSL_STRING) *sigopts,
73                              STACK_OF(X509) *rother, unsigned long flags,
74                              int nmin, int ndays, int badsig,
75                              const EVP_MD *resp_md);
76
77static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
78static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
79                        const char *port, int timeout);
80static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp);
81static char *prog;
82
83#ifdef HTTP_DAEMON
84static int index_changed(CA_DB *);
85#endif
86
87typedef enum OPTION_choice {
88    OPT_COMMON,
89    OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
90#ifndef OPENSSL_NO_SOCK
91    OPT_PROXY, OPT_NO_PROXY,
92#endif
93    OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
94    OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
95    OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
96    OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
97    OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
98    OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
99    OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE,
100    OPT_NOCAPATH, OPT_NOCASTORE,
101    OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
102    OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
103    OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
104    OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
105    OPT_PASSIN,
106    OPT_RCID,
107    OPT_V_ENUM,
108    OPT_MD,
109    OPT_MULTI, OPT_PROV_ENUM
110} OPTION_CHOICE;
111
112const OPTIONS ocsp_options[] = {
113    OPT_SECTION("General"),
114    {"help", OPT_HELP, '-', "Display this summary"},
115    {"ignore_err", OPT_IGNORE_ERR, '-',
116     "Ignore error on OCSP request or response and continue running"},
117    {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
118    {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
119    {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
120    {"no-CAfile", OPT_NOCAFILE, '-',
121     "Do not load the default certificates file"},
122    {"no-CApath", OPT_NOCAPATH, '-',
123     "Do not load certificates from the default certificates directory"},
124    {"no-CAstore", OPT_NOCASTORE, '-',
125     "Do not load certificates from the default certificates store"},
126
127    OPT_SECTION("Responder"),
128    {"timeout", OPT_TIMEOUT, 'p',
129     "Connection timeout (in seconds) to the OCSP responder"},
130    {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
131     "Don't include any certificates in response"},
132#ifdef HTTP_DAEMON
133    {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
134#endif
135    {"no_certs", OPT_NO_CERTS, '-',
136     "Don't include any certificates in signed request"},
137    {"badsig", OPT_BADSIG, '-',
138        "Corrupt last byte of loaded OCSP response signature (for test)"},
139    {"CA", OPT_CA, '<', "CA certificate"},
140    {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
141    {"nrequest", OPT_REQUEST, 'p',
142     "Number of requests to accept (default unlimited)"},
143    {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
144    {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
145    {"sign_other", OPT_SIGN_OTHER, '<',
146     "Additional certificates to include in signed request"},
147    {"index", OPT_INDEX, '<', "Certificate status index file"},
148    {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
149    {"rsigner", OPT_RSIGNER, '<',
150     "Responder certificate to sign responses with"},
151    {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
152    {"passin", OPT_PASSIN, 's', "Responder key pass phrase source"},
153    {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
154    {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
155    {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
156    {"header", OPT_HEADER, 's', "key=value header to add"},
157    {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
158    {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
159
160    OPT_SECTION("Client"),
161    {"url", OPT_URL, 's', "Responder URL"},
162    {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
163    {"port", OPT_PORT, 'N', "Port to run responder on"},
164    {"path", OPT_PATH, 's', "Path to use in OCSP request"},
165#ifndef OPENSSL_NO_SOCK
166    {"proxy", OPT_PROXY, 's',
167     "[http[s]://]host[:port][/path] of HTTP(S) proxy to use; path is ignored"},
168    {"no_proxy", OPT_NO_PROXY, 's',
169     "List of addresses of servers not to use HTTP(S) proxy for"},
170    {OPT_MORE_STR, 0, 0,
171     "Default from environment variable 'no_proxy', else 'NO_PROXY', else none"},
172#endif
173    {"out", OPT_OUTFILE, '>', "Output filename"},
174    {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
175    {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
176    {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
177    {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
178     "Don't check signature on response"},
179    {"resp_key_id", OPT_RESP_KEY_ID, '-',
180     "Identify response by signing certificate key ID"},
181    {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
182     "Don't check signing certificate"},
183    {"text", OPT_TEXT, '-', "Print text form of request and response"},
184    {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
185    {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
186    {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
187    {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
188     "Don't do additional checks on signing certificate"},
189    {"no_explicit", OPT_NO_EXPLICIT, '-',
190     "Do not explicitly check the chain, just verify the root"},
191    {"trust_other", OPT_TRUST_OTHER, '-',
192     "Don't verify additional certificates"},
193    {"no_intern", OPT_NO_INTERN, '-',
194     "Don't search certificates contained in response for signer"},
195    {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
196    {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
197    {"verify_other", OPT_VERIFY_OTHER, '<',
198     "Additional certificates to search for signer"},
199    {"cert", OPT_CERT, '<', "Certificate to check"},
200    {"serial", OPT_SERIAL, 's', "Serial number to check"},
201    {"validity_period", OPT_VALIDITY_PERIOD, 'u',
202     "Maximum validity discrepancy in seconds"},
203    {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
204    {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
205    {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
206    {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
207    {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
208
209    OPT_V_OPTIONS,
210    OPT_PROV_OPTIONS,
211    {NULL}
212};
213
214int ocsp_main(int argc, char **argv)
215{
216    BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
217    EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
218    STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
219    int trailing_md = 0;
220    CA_DB *rdb = NULL;
221    EVP_PKEY *key = NULL, *rkey = NULL;
222    OCSP_BASICRESP *bs = NULL;
223    OCSP_REQUEST *req = NULL;
224    OCSP_RESPONSE *resp = NULL;
225    STACK_OF(CONF_VALUE) *headers = NULL;
226    STACK_OF(OCSP_CERTID) *ids = NULL;
227    STACK_OF(OPENSSL_STRING) *reqnames = NULL;
228    STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
229    STACK_OF(X509) *issuers = NULL;
230    X509 *issuer = NULL, *cert = NULL;
231    STACK_OF(X509) *rca_cert = NULL;
232    EVP_MD *resp_certid_md = NULL;
233    X509 *signer = NULL, *rsigner = NULL;
234    X509_STORE *store = NULL;
235    X509_VERIFY_PARAM *vpm = NULL;
236    const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
237    char *header, *value, *respdigname = NULL;
238    char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
239#ifndef OPENSSL_NO_SOCK
240    char *opt_proxy = NULL;
241    char *opt_no_proxy = NULL;
242#endif
243    char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
244    char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
245    char *rsignfile = NULL, *rkeyfile = NULL;
246    char *passinarg = NULL, *passin = NULL;
247    char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
248    char *signfile = NULL, *keyfile = NULL;
249    char *thost = NULL, *tport = NULL, *tpath = NULL;
250    int noCAfile = 0, noCApath = 0, noCAstore = 0;
251    int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
252    int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
253    int req_text = 0, resp_text = 0, res, ret = 1;
254    int req_timeout = -1;
255    long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
256    unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
257    OPTION_CHOICE o;
258
259    if ((reqnames = sk_OPENSSL_STRING_new_null()) == NULL
260            || (ids = sk_OCSP_CERTID_new_null()) == NULL
261            || (vpm = X509_VERIFY_PARAM_new()) == NULL)
262        goto end;
263
264    prog = opt_init(argc, argv, ocsp_options);
265    while ((o = opt_next()) != OPT_EOF) {
266        switch (o) {
267        case OPT_EOF:
268        case OPT_ERR:
269 opthelp:
270            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
271            goto end;
272        case OPT_HELP:
273            ret = 0;
274            opt_help(ocsp_options);
275            goto end;
276        case OPT_OUTFILE:
277            outfile = opt_arg();
278            break;
279        case OPT_TIMEOUT:
280#ifndef OPENSSL_NO_SOCK
281            req_timeout = atoi(opt_arg());
282#endif
283            break;
284        case OPT_URL:
285            OPENSSL_free(thost);
286            OPENSSL_free(tport);
287            OPENSSL_free(tpath);
288            thost = tport = tpath = NULL;
289            if (!OSSL_HTTP_parse_url(opt_arg(), &use_ssl, NULL /* userinfo */,
290                                     &host, &port, NULL /* port_num */,
291                                     &path, NULL /* qry */, NULL /* frag */)) {
292                BIO_printf(bio_err, "%s Error parsing -url argument\n", prog);
293                goto end;
294            }
295            thost = host;
296            tport = port;
297            tpath = path;
298            break;
299        case OPT_HOST:
300            host = opt_arg();
301            break;
302        case OPT_PORT:
303            port = opt_arg();
304            break;
305        case OPT_PATH:
306            path = opt_arg();
307            break;
308#ifndef OPENSSL_NO_SOCK
309        case OPT_PROXY:
310            opt_proxy = opt_arg();
311            break;
312        case OPT_NO_PROXY:
313            opt_no_proxy = opt_arg();
314            break;
315#endif
316        case OPT_IGNORE_ERR:
317            ignore_err = 1;
318            break;
319        case OPT_NOVERIFY:
320            noverify = 1;
321            break;
322        case OPT_NONCE:
323            add_nonce = 2;
324            break;
325        case OPT_NO_NONCE:
326            add_nonce = 0;
327            break;
328        case OPT_RESP_NO_CERTS:
329            rflags |= OCSP_NOCERTS;
330            break;
331        case OPT_RESP_KEY_ID:
332            rflags |= OCSP_RESPID_KEY;
333            break;
334        case OPT_NO_CERTS:
335            sign_flags |= OCSP_NOCERTS;
336            break;
337        case OPT_NO_SIGNATURE_VERIFY:
338            verify_flags |= OCSP_NOSIGS;
339            break;
340        case OPT_NO_CERT_VERIFY:
341            verify_flags |= OCSP_NOVERIFY;
342            break;
343        case OPT_NO_CHAIN:
344            verify_flags |= OCSP_NOCHAIN;
345            break;
346        case OPT_NO_CERT_CHECKS:
347            verify_flags |= OCSP_NOCHECKS;
348            break;
349        case OPT_NO_EXPLICIT:
350            verify_flags |= OCSP_NOEXPLICIT;
351            break;
352        case OPT_TRUST_OTHER:
353            verify_flags |= OCSP_TRUSTOTHER;
354            break;
355        case OPT_NO_INTERN:
356            verify_flags |= OCSP_NOINTERN;
357            break;
358        case OPT_BADSIG:
359            badsig = 1;
360            break;
361        case OPT_TEXT:
362            req_text = resp_text = 1;
363            break;
364        case OPT_REQ_TEXT:
365            req_text = 1;
366            break;
367        case OPT_RESP_TEXT:
368            resp_text = 1;
369            break;
370        case OPT_REQIN:
371            reqin = opt_arg();
372            break;
373        case OPT_RESPIN:
374            respin = opt_arg();
375            break;
376        case OPT_SIGNER:
377            signfile = opt_arg();
378            break;
379        case OPT_VAFILE:
380            verify_certfile = opt_arg();
381            verify_flags |= OCSP_TRUSTOTHER;
382            break;
383        case OPT_SIGN_OTHER:
384            sign_certfile = opt_arg();
385            break;
386        case OPT_VERIFY_OTHER:
387            verify_certfile = opt_arg();
388            break;
389        case OPT_CAFILE:
390            CAfile = opt_arg();
391            break;
392        case OPT_CAPATH:
393            CApath = opt_arg();
394            break;
395        case OPT_CASTORE:
396            CAstore = opt_arg();
397            break;
398        case OPT_NOCAFILE:
399            noCAfile = 1;
400            break;
401        case OPT_NOCAPATH:
402            noCApath = 1;
403            break;
404        case OPT_NOCASTORE:
405            noCAstore = 1;
406            break;
407        case OPT_V_CASES:
408            if (!opt_verify(o, vpm))
409                goto end;
410            vpmtouched++;
411            break;
412        case OPT_VALIDITY_PERIOD:
413            opt_long(opt_arg(), &nsec);
414            break;
415        case OPT_STATUS_AGE:
416            opt_long(opt_arg(), &maxage);
417            break;
418        case OPT_SIGNKEY:
419            keyfile = opt_arg();
420            break;
421        case OPT_REQOUT:
422            reqout = opt_arg();
423            break;
424        case OPT_RESPOUT:
425            respout = opt_arg();
426            break;
427        case OPT_ISSUER:
428            issuer = load_cert(opt_arg(), FORMAT_UNDEF, "issuer certificate");
429            if (issuer == NULL)
430                goto end;
431            if (issuers == NULL) {
432                if ((issuers = sk_X509_new_null()) == NULL)
433                    goto end;
434            }
435            if (!sk_X509_push(issuers, issuer))
436                goto end;
437            break;
438        case OPT_CERT:
439            X509_free(cert);
440            cert = load_cert(opt_arg(), FORMAT_UNDEF, "certificate");
441            if (cert == NULL)
442                goto end;
443            if (cert_id_md == NULL)
444                cert_id_md = (EVP_MD *)EVP_sha1();
445            if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
446                goto end;
447            if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
448                goto end;
449            trailing_md = 0;
450            break;
451        case OPT_SERIAL:
452            if (cert_id_md == NULL)
453                cert_id_md = (EVP_MD *)EVP_sha1();
454            if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
455                goto end;
456            if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
457                goto end;
458            trailing_md = 0;
459            break;
460        case OPT_INDEX:
461            ridx_filename = opt_arg();
462            break;
463        case OPT_CA:
464            rca_filename = opt_arg();
465            break;
466        case OPT_NMIN:
467            nmin = opt_int_arg();
468            if (ndays == -1)
469                ndays = 0;
470            break;
471        case OPT_REQUEST:
472            accept_count = opt_int_arg();
473            break;
474        case OPT_NDAYS:
475            ndays = atoi(opt_arg());
476            break;
477        case OPT_RSIGNER:
478            rsignfile = opt_arg();
479            break;
480        case OPT_RKEY:
481            rkeyfile = opt_arg();
482            break;
483        case OPT_PASSIN:
484            passinarg = opt_arg();
485            break;
486        case OPT_ROTHER:
487            rcertfile = opt_arg();
488            break;
489        case OPT_RMD:   /* Response MessageDigest */
490            respdigname = opt_arg();
491            break;
492        case OPT_RSIGOPT:
493            if (rsign_sigopts == NULL)
494                rsign_sigopts = sk_OPENSSL_STRING_new_null();
495            if (rsign_sigopts == NULL
496                || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
497                goto end;
498            break;
499        case OPT_HEADER:
500            header = opt_arg();
501            value = strchr(header, '=');
502            if (value == NULL) {
503                BIO_printf(bio_err, "Missing = in header key=value\n");
504                goto opthelp;
505            }
506            *value++ = '\0';
507            if (!X509V3_add_value(header, value, &headers))
508                goto end;
509            break;
510        case OPT_RCID:
511            if (!opt_md(opt_arg(), &resp_certid_md))
512                goto opthelp;
513            break;
514        case OPT_MD:
515            if (trailing_md) {
516                BIO_printf(bio_err,
517                           "%s: Digest must be before -cert or -serial\n",
518                           prog);
519                goto opthelp;
520            }
521            if (!opt_md(opt_unknown(), &cert_id_md))
522                goto opthelp;
523            trailing_md = 1;
524            break;
525        case OPT_MULTI:
526#ifdef HTTP_DAEMON
527            multi = atoi(opt_arg());
528#endif
529            break;
530        case OPT_PROV_CASES:
531            if (!opt_provider(o))
532                goto end;
533            break;
534        }
535    }
536
537    /* No extra arguments. */
538    argc = opt_num_rest();
539    if (argc != 0)
540        goto opthelp;
541
542    if (trailing_md) {
543        BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
544                   prog);
545        goto opthelp;
546    }
547
548    if (respdigname != NULL) {
549        if (!opt_md(respdigname, &rsign_md))
550            goto end;
551    }
552
553    /* Have we anything to do? */
554    if (req == NULL && reqin == NULL
555        && respin == NULL && !(port != NULL && ridx_filename != NULL))
556        goto opthelp;
557
558    out = bio_open_default(outfile, 'w', FORMAT_TEXT);
559    if (out == NULL)
560        goto end;
561
562    if (req == NULL && (add_nonce != 2))
563        add_nonce = 0;
564
565    if (req == NULL && reqin != NULL) {
566        derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
567        if (derbio == NULL)
568            goto end;
569        req = d2i_OCSP_REQUEST_bio(derbio, NULL);
570        BIO_free(derbio);
571        if (req == NULL) {
572            BIO_printf(bio_err, "Error reading OCSP request\n");
573            goto end;
574        }
575    }
576
577    if (req == NULL && port != NULL) {
578#ifndef OPENSSL_NO_SOCK
579        acbio = http_server_init_bio(prog, port);
580        if (acbio == NULL)
581            goto end;
582#else
583        BIO_printf(bio_err, "Cannot act as server - sockets not supported\n");
584        goto end;
585#endif
586    }
587
588    if (rsignfile != NULL) {
589        if (rkeyfile == NULL)
590            rkeyfile = rsignfile;
591        rsigner = load_cert(rsignfile, FORMAT_UNDEF, "responder certificate");
592        if (rsigner == NULL) {
593            BIO_printf(bio_err, "Error loading responder certificate\n");
594            goto end;
595        }
596        if (!load_certs(rca_filename, 0, &rca_cert, NULL, "CA certificates"))
597            goto end;
598        if (rcertfile != NULL) {
599            if (!load_certs(rcertfile, 0, &rother, NULL,
600                            "responder other certificates"))
601                goto end;
602        }
603        if (!app_passwd(passinarg, NULL, &passin, NULL)) {
604            BIO_printf(bio_err, "Error getting password\n");
605            goto end;
606        }
607        rkey = load_key(rkeyfile, FORMAT_UNDEF, 0, passin, NULL,
608                        "responder private key");
609        if (rkey == NULL)
610            goto end;
611    }
612
613    if (ridx_filename != NULL
614        && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
615        BIO_printf(bio_err,
616                   "Responder mode requires certificate, key, and CA.\n");
617        goto end;
618    }
619
620    if (ridx_filename != NULL) {
621        rdb = load_index(ridx_filename, NULL);
622        if (rdb == NULL || index_index(rdb) <= 0) {
623            BIO_printf(bio_err,
624                "Problem with index file: %s (could not load/parse file)\n",
625                ridx_filename);
626            ret = 1;
627            goto end;
628        }
629    }
630
631#ifdef HTTP_DAEMON
632    if (multi && acbio != NULL)
633        spawn_loop(prog);
634    if (acbio != NULL && req_timeout > 0)
635        signal(SIGALRM, socket_timeout);
636#endif
637
638    if (acbio != NULL)
639        log_message(prog, LOG_INFO, "waiting for OCSP client connections...");
640
641redo_accept:
642
643    if (acbio != NULL) {
644#ifdef HTTP_DAEMON
645        if (index_changed(rdb)) {
646            CA_DB *newrdb = load_index(ridx_filename, NULL);
647
648            if (newrdb != NULL && index_index(newrdb) > 0) {
649                free_index(rdb);
650                rdb = newrdb;
651            } else {
652                free_index(newrdb);
653                log_message(prog, LOG_ERR, "error reloading updated index: %s",
654                            ridx_filename);
655            }
656        }
657#endif
658
659        req = NULL;
660        res = do_responder(&req, &cbio, acbio, port, req_timeout);
661        if (res == 0)
662            goto redo_accept;
663
664        if (req == NULL) {
665            if (res == 1) {
666                resp =
667                    OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
668                                         NULL);
669                send_ocsp_response(cbio, resp);
670            }
671            goto done_resp;
672        }
673    }
674
675    if (req == NULL
676        && (signfile != NULL || reqout != NULL
677            || host != NULL || add_nonce || ridx_filename != NULL)) {
678        BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
679        goto end;
680    }
681
682    if (req != NULL && add_nonce) {
683        if (!OCSP_request_add1_nonce(req, NULL, -1))
684            goto end;
685    }
686
687    if (signfile != NULL) {
688        if (keyfile == NULL)
689            keyfile = signfile;
690        signer = load_cert(signfile, FORMAT_UNDEF, "signer certificate");
691        if (signer == NULL) {
692            BIO_printf(bio_err, "Error loading signer certificate\n");
693            goto end;
694        }
695        if (sign_certfile != NULL) {
696            if (!load_certs(sign_certfile, 0, &sign_other, NULL,
697                            "signer certificates"))
698                goto end;
699        }
700        key = load_key(keyfile, FORMAT_UNDEF, 0, NULL, NULL,
701                       "signer private key");
702        if (key == NULL)
703            goto end;
704
705        if (!OCSP_request_sign(req, signer, key, NULL,
706                               sign_other, sign_flags)) {
707            BIO_printf(bio_err, "Error signing OCSP request\n");
708            goto end;
709        }
710    }
711
712    if (req_text && req != NULL)
713        OCSP_REQUEST_print(out, req, 0);
714
715    if (reqout != NULL) {
716        derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
717        if (derbio == NULL)
718            goto end;
719        i2d_OCSP_REQUEST_bio(derbio, req);
720        BIO_free(derbio);
721    }
722
723    if (rdb != NULL) {
724        make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
725                           rsign_md, rsign_sigopts, rother, rflags, nmin, ndays,
726                           badsig, resp_certid_md);
727        if (resp == NULL)
728            goto end;
729        if (cbio != NULL)
730            send_ocsp_response(cbio, resp);
731    } else if (host != NULL) {
732#ifndef OPENSSL_NO_SOCK
733        resp = process_responder(req, host, port, path, opt_proxy, opt_no_proxy,
734                                 use_ssl, headers, req_timeout);
735        if (resp == NULL)
736            goto end;
737#else
738        BIO_printf(bio_err,
739                   "Error creating connect BIO - sockets not supported\n");
740        goto end;
741#endif
742    } else if (respin != NULL) {
743        derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
744        if (derbio == NULL)
745            goto end;
746        resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
747        BIO_free(derbio);
748        if (resp == NULL) {
749            BIO_printf(bio_err, "Error reading OCSP response\n");
750            goto end;
751        }
752    } else {
753        ret = 0;
754        goto end;
755    }
756
757 done_resp:
758
759    if (respout != NULL) {
760        derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
761        if (derbio == NULL)
762            goto end;
763        i2d_OCSP_RESPONSE_bio(derbio, resp);
764        BIO_free(derbio);
765    }
766
767    i = OCSP_response_status(resp);
768    if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
769        BIO_printf(out, "Responder Error: %s (%d)\n",
770                   OCSP_response_status_str(i), i);
771        if (!ignore_err)
772                goto end;
773    }
774
775    if (resp_text)
776        OCSP_RESPONSE_print(out, resp, 0);
777
778    /* If running as responder don't verify our own response */
779    if (cbio != NULL) {
780        /* If not unlimited, see if we took all we should. */
781        if (accept_count != -1 && --accept_count <= 0) {
782            ret = 0;
783            goto end;
784        }
785        BIO_free_all(cbio);
786        cbio = NULL;
787        OCSP_REQUEST_free(req);
788        req = NULL;
789        OCSP_RESPONSE_free(resp);
790        resp = NULL;
791        goto redo_accept;
792    }
793    if (ridx_filename != NULL) {
794        ret = 0;
795        goto end;
796    }
797
798    if (store == NULL) {
799        store = setup_verify(CAfile, noCAfile, CApath, noCApath,
800                             CAstore, noCAstore);
801        if (!store)
802            goto end;
803    }
804    if (vpmtouched)
805        X509_STORE_set1_param(store, vpm);
806    if (verify_certfile != NULL) {
807        if (!load_certs(verify_certfile, 0, &verify_other, NULL,
808                        "validator certificates"))
809            goto end;
810    }
811
812    bs = OCSP_response_get1_basic(resp);
813    if (bs == NULL) {
814        BIO_printf(bio_err, "Error parsing response\n");
815        goto end;
816    }
817
818    ret = 0;
819
820    if (!noverify) {
821        if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
822            if (i == -1)
823                BIO_printf(bio_err, "WARNING: no nonce in response\n");
824            else {
825                BIO_printf(bio_err, "Nonce Verify error\n");
826                ret = 1;
827                goto end;
828            }
829        }
830
831        i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
832        if (i <= 0 && issuers) {
833            i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
834            if (i > 0)
835                ERR_clear_error();
836        }
837        if (i <= 0) {
838            BIO_printf(bio_err, "Response Verify Failure\n");
839            ERR_print_errors(bio_err);
840            ret = 1;
841        } else {
842            BIO_printf(bio_err, "Response verify OK\n");
843        }
844    }
845
846    if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
847        ret = 1;
848
849 end:
850    ERR_print_errors(bio_err);
851    X509_free(signer);
852    X509_STORE_free(store);
853    X509_VERIFY_PARAM_free(vpm);
854    sk_OPENSSL_STRING_free(rsign_sigopts);
855    EVP_PKEY_free(key);
856    EVP_PKEY_free(rkey);
857    EVP_MD_free(cert_id_md);
858    EVP_MD_free(rsign_md);
859    EVP_MD_free(resp_certid_md);
860    X509_free(cert);
861    sk_X509_pop_free(issuers, X509_free);
862    X509_free(rsigner);
863    sk_X509_pop_free(rca_cert, X509_free);
864    free_index(rdb);
865    BIO_free_all(cbio);
866    BIO_free_all(acbio);
867    BIO_free_all(out);
868    OCSP_REQUEST_free(req);
869    OCSP_RESPONSE_free(resp);
870    OCSP_BASICRESP_free(bs);
871    sk_OPENSSL_STRING_free(reqnames);
872    sk_OCSP_CERTID_free(ids);
873    sk_X509_pop_free(sign_other, X509_free);
874    sk_X509_pop_free(verify_other, X509_free);
875    sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
876    OPENSSL_free(thost);
877    OPENSSL_free(tport);
878    OPENSSL_free(tpath);
879
880    return ret;
881}
882
883#ifdef HTTP_DAEMON
884
885static int index_changed(CA_DB *rdb)
886{
887    struct stat sb;
888
889    if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
890        if (rdb->dbst.st_mtime != sb.st_mtime
891            || rdb->dbst.st_ctime != sb.st_ctime
892            || rdb->dbst.st_ino != sb.st_ino
893            || rdb->dbst.st_dev != sb.st_dev) {
894            syslog(LOG_INFO, "index file changed, reloading");
895            return 1;
896        }
897    }
898    return 0;
899}
900
901#endif
902
903static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
904                         const EVP_MD *cert_id_md, X509 *issuer,
905                         STACK_OF(OCSP_CERTID) *ids)
906{
907    OCSP_CERTID *id;
908
909    if (issuer == NULL) {
910        BIO_printf(bio_err, "No issuer certificate specified\n");
911        return 0;
912    }
913    if (*req == NULL)
914        *req = OCSP_REQUEST_new();
915    if (*req == NULL)
916        goto err;
917    id = OCSP_cert_to_id(cert_id_md, cert, issuer);
918    if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
919        goto err;
920    if (!OCSP_request_add0_id(*req, id))
921        goto err;
922    return 1;
923
924 err:
925    BIO_printf(bio_err, "Error Creating OCSP request\n");
926    return 0;
927}
928
929static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
930                           const EVP_MD *cert_id_md, X509 *issuer,
931                           STACK_OF(OCSP_CERTID) *ids)
932{
933    OCSP_CERTID *id;
934    const X509_NAME *iname;
935    ASN1_BIT_STRING *ikey;
936    ASN1_INTEGER *sno;
937
938    if (issuer == NULL) {
939        BIO_printf(bio_err, "No issuer certificate specified\n");
940        return 0;
941    }
942    if (*req == NULL)
943        *req = OCSP_REQUEST_new();
944    if (*req == NULL)
945        goto err;
946    iname = X509_get_subject_name(issuer);
947    ikey = X509_get0_pubkey_bitstr(issuer);
948    sno = s2i_ASN1_INTEGER(NULL, serial);
949    if (sno == NULL) {
950        BIO_printf(bio_err, "Error converting serial number %s\n", serial);
951        return 0;
952    }
953    id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
954    ASN1_INTEGER_free(sno);
955    if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
956        goto err;
957    if (!OCSP_request_add0_id(*req, id))
958        goto err;
959    return 1;
960
961 err:
962    BIO_printf(bio_err, "Error Creating OCSP request\n");
963    return 0;
964}
965
966static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
967                              STACK_OF(OPENSSL_STRING) *names,
968                              STACK_OF(OCSP_CERTID) *ids, long nsec,
969                              long maxage)
970{
971    OCSP_CERTID *id;
972    const char *name;
973    int i, status, reason;
974    ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
975    int ret = 1;
976
977    if (req == NULL || !sk_OPENSSL_STRING_num(names))
978        return 1;
979
980    if (bs == NULL || !sk_OCSP_CERTID_num(ids))
981        return 0;
982
983    for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
984        id = sk_OCSP_CERTID_value(ids, i);
985        name = sk_OPENSSL_STRING_value(names, i);
986        BIO_printf(out, "%s: ", name);
987
988        if (!OCSP_resp_find_status(bs, id, &status, &reason,
989                                   &rev, &thisupd, &nextupd)) {
990            BIO_puts(out, "ERROR: No Status found.\n");
991            ret = 0;
992            continue;
993        }
994
995        /*
996         * Check validity: if invalid write to output BIO so we know which
997         * response this refers to.
998         */
999        if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1000            BIO_puts(out, "WARNING: Status times invalid.\n");
1001            ERR_print_errors(out);
1002        }
1003        BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1004
1005        BIO_puts(out, "\tThis Update: ");
1006        ASN1_GENERALIZEDTIME_print(out, thisupd);
1007        BIO_puts(out, "\n");
1008
1009        if (nextupd) {
1010            BIO_puts(out, "\tNext Update: ");
1011            ASN1_GENERALIZEDTIME_print(out, nextupd);
1012            BIO_puts(out, "\n");
1013        }
1014
1015        if (status != V_OCSP_CERTSTATUS_REVOKED)
1016            continue;
1017
1018        if (reason != -1)
1019            BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1020
1021        BIO_puts(out, "\tRevocation Time: ");
1022        ASN1_GENERALIZEDTIME_print(out, rev);
1023        BIO_puts(out, "\n");
1024    }
1025    return ret;
1026}
1027
1028static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1029                              CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1030                              EVP_PKEY *rkey, const EVP_MD *rmd,
1031                              STACK_OF(OPENSSL_STRING) *sigopts,
1032                              STACK_OF(X509) *rother, unsigned long flags,
1033                              int nmin, int ndays, int badsig,
1034                              const EVP_MD *resp_md)
1035{
1036    ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1037    OCSP_CERTID *cid;
1038    OCSP_BASICRESP *bs = NULL;
1039    int i, id_count;
1040    EVP_MD_CTX *mctx = NULL;
1041    EVP_PKEY_CTX *pkctx = NULL;
1042
1043    id_count = OCSP_request_onereq_count(req);
1044
1045    if (id_count <= 0) {
1046        *resp =
1047            OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1048        goto end;
1049    }
1050
1051    bs = OCSP_BASICRESP_new();
1052    thisupd = X509_gmtime_adj(NULL, 0);
1053    if (ndays != -1)
1054        nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1055
1056    /* Examine each certificate id in the request */
1057    for (i = 0; i < id_count; i++) {
1058        OCSP_ONEREQ *one;
1059        ASN1_INTEGER *serial;
1060        char **inf;
1061        int jj;
1062        int found = 0;
1063        ASN1_OBJECT *cert_id_md_oid;
1064        const EVP_MD *cert_id_md;
1065        OCSP_CERTID *cid_resp_md = NULL;
1066
1067        one = OCSP_request_onereq_get0(req, i);
1068        cid = OCSP_onereq_get0_id(one);
1069
1070        OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1071
1072        cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1073        if (cert_id_md == NULL) {
1074            *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1075                                         NULL);
1076            goto end;
1077        }
1078        for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1079            X509 *ca_cert = sk_X509_value(ca, jj);
1080            OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1081
1082            if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
1083                found = 1;
1084                if (resp_md != NULL)
1085                    cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
1086            }
1087            OCSP_CERTID_free(ca_id);
1088        }
1089        OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1090        inf = lookup_serial(db, serial);
1091
1092        /* at this point, we can have cid be an alias of cid_resp_md */
1093        cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
1094
1095        if (!found) {
1096            OCSP_basic_add1_status(bs, cid,
1097                                   V_OCSP_CERTSTATUS_UNKNOWN,
1098                                   0, NULL, thisupd, nextupd);
1099            continue;
1100        }
1101        if (inf == NULL) {
1102            OCSP_basic_add1_status(bs, cid,
1103                                   V_OCSP_CERTSTATUS_UNKNOWN,
1104                                   0, NULL, thisupd, nextupd);
1105        } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1106            OCSP_basic_add1_status(bs, cid,
1107                                   V_OCSP_CERTSTATUS_GOOD,
1108                                   0, NULL, thisupd, nextupd);
1109        } else if (inf[DB_type][0] == DB_TYPE_REV) {
1110            ASN1_OBJECT *inst = NULL;
1111            ASN1_TIME *revtm = NULL;
1112            ASN1_GENERALIZEDTIME *invtm = NULL;
1113            OCSP_SINGLERESP *single;
1114            int reason = -1;
1115
1116            unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1117            single = OCSP_basic_add1_status(bs, cid,
1118                                            V_OCSP_CERTSTATUS_REVOKED,
1119                                            reason, revtm, thisupd, nextupd);
1120            if (single == NULL) {
1121                *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1122                                             NULL);
1123                goto end;
1124            }
1125            if (invtm != NULL)
1126                OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1127                                             invtm, 0, 0);
1128            else if (inst != NULL)
1129                OCSP_SINGLERESP_add1_ext_i2d(single,
1130                                             NID_hold_instruction_code, inst,
1131                                             0, 0);
1132            ASN1_OBJECT_free(inst);
1133            ASN1_TIME_free(revtm);
1134            ASN1_GENERALIZEDTIME_free(invtm);
1135        }
1136        OCSP_CERTID_free(cid_resp_md);
1137    }
1138
1139    OCSP_copy_nonce(bs, req);
1140
1141    mctx = EVP_MD_CTX_new();
1142    if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1143        *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1144        goto end;
1145    }
1146    for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1147        char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1148
1149        if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1150            BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1151            ERR_print_errors(bio_err);
1152            *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1153                                         NULL);
1154            goto end;
1155        }
1156    }
1157    if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1158        *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1159        goto end;
1160    }
1161
1162    if (badsig) {
1163        const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1164        corrupt_signature(sig);
1165    }
1166
1167    *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1168
1169 end:
1170    EVP_MD_CTX_free(mctx);
1171    ASN1_TIME_free(thisupd);
1172    ASN1_TIME_free(nextupd);
1173    OCSP_BASICRESP_free(bs);
1174}
1175
1176static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1177{
1178    int i;
1179    BIGNUM *bn = NULL;
1180    char *itmp, *row[DB_NUMBER], **rrow;
1181    for (i = 0; i < DB_NUMBER; i++)
1182        row[i] = NULL;
1183    bn = ASN1_INTEGER_to_BN(ser, NULL);
1184    OPENSSL_assert(bn);         /* FIXME: should report an error at this
1185                                 * point and abort */
1186    if (BN_is_zero(bn)) {
1187        itmp = OPENSSL_strdup("00");
1188        OPENSSL_assert(itmp);
1189    } else {
1190        itmp = BN_bn2hex(bn);
1191    }
1192    row[DB_serial] = itmp;
1193    BN_free(bn);
1194    rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1195    OPENSSL_free(itmp);
1196    return rrow;
1197}
1198
1199static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1200                        const char *port, int timeout)
1201{
1202#ifndef OPENSSL_NO_SOCK
1203    return http_server_get_asn1_req(ASN1_ITEM_rptr(OCSP_REQUEST),
1204                                    (ASN1_VALUE **)preq, NULL, pcbio, acbio,
1205                                    NULL /* found_keep_alive */,
1206                                    prog, port, 1 /* accept_get */, timeout);
1207#else
1208    BIO_printf(bio_err,
1209               "Error getting OCSP request - sockets not supported\n");
1210    *preq = NULL;
1211    return 0;
1212#endif
1213}
1214
1215static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp)
1216{
1217#ifndef OPENSSL_NO_SOCK
1218    return http_server_send_asn1_resp(cbio,
1219                                      0 /* no keep-alive */,
1220                                      "application/ocsp-response",
1221                                      ASN1_ITEM_rptr(OCSP_RESPONSE),
1222                                      (const ASN1_VALUE *)resp);
1223#else
1224    BIO_printf(bio_err,
1225               "Error sending OCSP response - sockets not supported\n");
1226    return 0;
1227#endif
1228}
1229
1230#ifndef OPENSSL_NO_SOCK
1231OCSP_RESPONSE *process_responder(OCSP_REQUEST *req, const char *host,
1232                                 const char *port, const char *path,
1233                                 const char *proxy, const char *no_proxy,
1234                                 int use_ssl, STACK_OF(CONF_VALUE) *headers,
1235                                 int req_timeout)
1236{
1237    SSL_CTX *ctx = NULL;
1238    OCSP_RESPONSE *resp = NULL;
1239
1240    if (use_ssl == 1) {
1241        ctx = SSL_CTX_new(TLS_client_method());
1242        if (ctx == NULL) {
1243            BIO_printf(bio_err, "Error creating SSL context.\n");
1244            goto end;
1245        }
1246    }
1247
1248    resp = (OCSP_RESPONSE *)
1249        app_http_post_asn1(host, port, path, proxy, no_proxy,
1250                           ctx, headers, "application/ocsp-request",
1251                           (ASN1_VALUE *)req, ASN1_ITEM_rptr(OCSP_REQUEST),
1252                           "application/ocsp-response",
1253                           req_timeout, ASN1_ITEM_rptr(OCSP_RESPONSE));
1254
1255    if (resp == NULL)
1256        BIO_printf(bio_err, "Error querying OCSP responder\n");
1257
1258 end:
1259    SSL_CTX_free(ctx);
1260    return resp;
1261}
1262#endif
1263