apps/ocsp.c

   1 /*
   2  * Copyright 2001-2018 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_NO_OCSP
  13 NON_EMPTY_TRANSLATION_UNIT
  14 #else
  15 # ifdef OPENSSL_SYS_VMS
  16 #  define _XOPEN_SOURCE_EXTENDED/* So fd_set and friends get properly defined
  17                                  * on OpenVMS */
  18 # endif
  19
  20 # include <stdio.h>
  21 # include <stdlib.h>
  22 # include <string.h>
  23 # include <time.h>
  24 # include <ctype.h>
  25
  26 /* Needs to be included before the openssl headers */
  27 # include "apps.h"
  28 # include "progs.h"
  29 # include "internal/sockets.h"
  30 # include <openssl/e_os2.h>
  31 # include <openssl/crypto.h>
  32 # include <openssl/err.h>
  33 # include <openssl/ssl.h>
  34 # include <openssl/evp.h>
  35 # include <openssl/bn.h>
  36 # include <openssl/x509v3.h>
  37 # include <openssl/rand.h>
  38
  39 #ifndef HAVE_FORK
  40 # if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS)
  41 #  define HAVE_FORK 0
  42 # else
  43 #  define HAVE_FORK 1
  44 # endif
  45 #endif
  46
  47 #if HAVE_FORK
  48 # undef NO_FORK
  49 #else
  50 # define NO_FORK
  51 #endif
  52
  53 # if !defined(NO_FORK) && !defined(OPENSSL_NO_SOCK) \
  54      && !defined(OPENSSL_NO_POSIX_IO)
  55 #  define OCSP_DAEMON
  56 #  include <sys/types.h>
  57 #  include <sys/wait.h>
  58 #  include <syslog.h>
  59 #  include <signal.h>
  60 #  define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
  61 # else
  62 #  undef LOG_INFO
  63 #  undef LOG_WARNING
  64 #  undef LOG_ERR
  65 #  define LOG_INFO      0
  66 #  define LOG_WARNING   1
  67 #  define LOG_ERR       2
  68 # endif
  69
  70 # if defined(OPENSSL_SYS_VXWORKS)
  71 /* not supported */
  72 int setpgid(pid_t pid, pid_t pgid)
  73 {
  74     errno = ENOSYS;
  75     return 0;
  76 }
  77 /* not supported */
  78 pid_t fork(void)
  79 {
  80     errno = ENOSYS;
  81     return (pid_t) -1;
  82 }
  83 # endif
  84 /* Maximum leeway in validity period: default 5 minutes */
  85 # define MAX_VALIDITY_PERIOD    (5 * 60)
  86
  87 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
  88                          const EVP_MD *cert_id_md, X509 *issuer,
  89                          STACK_OF(OCSP_CERTID) *ids);
  90 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
  91                            const EVP_MD *cert_id_md, X509 *issuer,
  92                            STACK_OF(OCSP_CERTID) *ids);
  93 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
  94                               STACK_OF(OPENSSL_STRING) *names,
  95                               STACK_OF(OCSP_CERTID) *ids, long nsec,
  96                               long maxage);
  97 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
  98                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
  99                               EVP_PKEY *rkey, const EVP_MD *md,
 100                               STACK_OF(OPENSSL_STRING) *sigopts,
 101                               STACK_OF(X509) *rother, unsigned long flags,
 102                               int nmin, int ndays, int badsig,
 103                               const EVP_MD *resp_md);
 104
 105 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 106 static BIO *init_responder(const char *port);
 107 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, int timeout);
 108 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 109 static void log_message(int level, const char *fmt, ...);
 110 static char *prog;
 111 static int multi = 0;
 112
 113 # ifdef OCSP_DAEMON
 114 static int acfd = (int) INVALID_SOCKET;
 115 static int index_changed(CA_DB *);
 116 static void spawn_loop(void);
 117 static int print_syslog(const char *str, size_t len, void *levPtr);
 118 static void sock_timeout(int signum);
 119 # endif
 120
 121 # ifndef OPENSSL_NO_SOCK
 122 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
 123                                       const char *path,
 124                                       const STACK_OF(CONF_VALUE) *headers,
 125                                       OCSP_REQUEST *req, int req_timeout);
 126 # endif
 127
 128 typedef enum OPTION_choice {
 129     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 130     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 131     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 132     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 133     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 134     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 135     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 136     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 137     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH,
 138     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 139     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 140     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 141     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
 142     OPT_RCID,
 143     OPT_V_ENUM,
 144     OPT_MD,
 145     OPT_MULTI
 146 } OPTION_CHOICE;
 147
 148 const OPTIONS ocsp_options[] = {
 149     {"help", OPT_HELP, '-', "Display this summary"},
 150     {"out", OPT_OUTFILE, '>', "Output filename"},
 151     {"timeout", OPT_TIMEOUT, 'p',
 152      "Connection timeout (in seconds) to the OCSP responder"},
 153     {"url", OPT_URL, 's', "Responder URL"},
 154     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
 155     {"port", OPT_PORT, 'p', "Port to run responder on"},
 156     {"ignore_err", OPT_IGNORE_ERR, '-',
 157      "Ignore error on OCSP request or response and continue running"},
 158     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 159     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 160     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 161     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 162      "Don't include any certificates in response"},
 163     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 164      "Identify response by signing certificate key ID"},
 165 # ifdef OCSP_DAEMON
 166     {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
 167 # endif
 168     {"no_certs", OPT_NO_CERTS, '-',
 169      "Don't include any certificates in signed request"},
 170     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 171      "Don't check signature on response"},
 172     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 173      "Don't check signing certificate"},
 174     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 175     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 176      "Don't do additional checks on signing certificate"},
 177     {"no_explicit", OPT_NO_EXPLICIT, '-',
 178      "Do not explicitly check the chain, just verify the root"},
 179     {"trust_other", OPT_TRUST_OTHER, '-',
 180      "Don't verify additional certificates"},
 181     {"no_intern", OPT_NO_INTERN, '-',
 182      "Don't search certificates contained in response for signer"},
 183     {"badsig", OPT_BADSIG, '-',
 184         "Corrupt last byte of loaded OSCP response signature (for test)"},
 185     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 186     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 187     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 188     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 189     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 190     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 191     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 192     {"sign_other", OPT_SIGN_OTHER, '<',
 193      "Additional certificates to include in signed request"},
 194     {"verify_other", OPT_VERIFY_OTHER, '<',
 195      "Additional certificates to search for signer"},
 196     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 197     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 198     {"no-CAfile", OPT_NOCAFILE, '-',
 199      "Do not load the default certificates file"},
 200     {"no-CApath", OPT_NOCAPATH, '-',
 201      "Do not load certificates from the default certificates directory"},
 202     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 203      "Maximum validity discrepancy in seconds"},
 204     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 205     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 206     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 207     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 208     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 209     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 210     {"cert", OPT_CERT, '<', "Certificate to check"},
 211     {"serial", OPT_SERIAL, 's', "Serial number to check"},
 212     {"index", OPT_INDEX, '<', "Certificate status index file"},
 213     {"CA", OPT_CA, '<', "CA certificate"},
 214     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 215     {"nrequest", OPT_REQUEST, 'p',
 216      "Number of requests to accept (default unlimited)"},
 217     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 218     {"rsigner", OPT_RSIGNER, '<',
 219      "Responder certificate to sign responses with"},
 220     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 221     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 222     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
 223     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
 224     {"header", OPT_HEADER, 's', "key=value header to add"},
 225     {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
 226     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
 227     OPT_V_OPTIONS,
 228     {NULL}
 229 };
 230
 231 int ocsp_main(int argc, char **argv)
 232 {
 233     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 234     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 235     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
 236     int trailing_md = 0;
 237     CA_DB *rdb = NULL;
 238     EVP_PKEY *key = NULL, *rkey = NULL;
 239     OCSP_BASICRESP *bs = NULL;
 240     OCSP_REQUEST *req = NULL;
 241     OCSP_RESPONSE *resp = NULL;
 242     STACK_OF(CONF_VALUE) *headers = NULL;
 243     STACK_OF(OCSP_CERTID) *ids = NULL;
 244     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 245     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 246     STACK_OF(X509) *issuers = NULL;
 247     X509 *issuer = NULL, *cert = NULL;
 248     STACK_OF(X509) *rca_cert = NULL;
 249     const EVP_MD *resp_certid_md = NULL;
 250     X509 *signer = NULL, *rsigner = NULL;
 251     X509_STORE *store = NULL;
 252     X509_VERIFY_PARAM *vpm = NULL;
 253     const char *CAfile = NULL, *CApath = NULL;
 254     char *header, *value;
 255     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 256     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 257     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 258     char *rsignfile = NULL, *rkeyfile = NULL;
 259     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 260     char *signfile = NULL, *keyfile = NULL;
 261     char *thost = NULL, *tport = NULL, *tpath = NULL;
 262     int noCAfile = 0, noCApath = 0;
 263     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 264     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 265     int req_text = 0, resp_text = 0, ret = 1;
 266     int req_timeout = -1;
 267     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 268     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 269     OPTION_CHOICE o;
 270
 271     reqnames = sk_OPENSSL_STRING_new_null();
 272     if (reqnames == NULL)
 273         goto end;
 274     ids = sk_OCSP_CERTID_new_null();
 275     if (ids == NULL)
 276         goto end;
 277     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 278         return 1;
 279
 280     prog = opt_init(argc, argv, ocsp_options);
 281     while ((o = opt_next()) != OPT_EOF) {
 282         switch (o) {
 283         case OPT_EOF:
 284         case OPT_ERR:
 285  opthelp:
 286             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 287             goto end;
 288         case OPT_HELP:
 289             ret = 0;
 290             opt_help(ocsp_options);
 291             goto end;
 292         case OPT_OUTFILE:
 293             outfile = opt_arg();
 294             break;
 295         case OPT_TIMEOUT:
 296 #ifndef OPENSSL_NO_SOCK
 297             req_timeout = atoi(opt_arg());
 298 #endif
 299             break;
 300         case OPT_URL:
 301             OPENSSL_free(thost);
 302             OPENSSL_free(tport);
 303             OPENSSL_free(tpath);
 304             thost = tport = tpath = NULL;
 305             if (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
 306                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 307                 goto end;
 308             }
 309             thost = host;
 310             tport = port;
 311             tpath = path;
 312             break;
 313         case OPT_HOST:
 314             host = opt_arg();
 315             break;
 316         case OPT_PORT:
 317             port = opt_arg();
 318             break;
 319         case OPT_IGNORE_ERR:
 320             ignore_err = 1;
 321             break;
 322         case OPT_NOVERIFY:
 323             noverify = 1;
 324             break;
 325         case OPT_NONCE:
 326             add_nonce = 2;
 327             break;
 328         case OPT_NO_NONCE:
 329             add_nonce = 0;
 330             break;
 331         case OPT_RESP_NO_CERTS:
 332             rflags |= OCSP_NOCERTS;
 333             break;
 334         case OPT_RESP_KEY_ID:
 335             rflags |= OCSP_RESPID_KEY;
 336             break;
 337         case OPT_NO_CERTS:
 338             sign_flags |= OCSP_NOCERTS;
 339             break;
 340         case OPT_NO_SIGNATURE_VERIFY:
 341             verify_flags |= OCSP_NOSIGS;
 342             break;
 343         case OPT_NO_CERT_VERIFY:
 344             verify_flags |= OCSP_NOVERIFY;
 345             break;
 346         case OPT_NO_CHAIN:
 347             verify_flags |= OCSP_NOCHAIN;
 348             break;
 349         case OPT_NO_CERT_CHECKS:
 350             verify_flags |= OCSP_NOCHECKS;
 351             break;
 352         case OPT_NO_EXPLICIT:
 353             verify_flags |= OCSP_NOEXPLICIT;
 354             break;
 355         case OPT_TRUST_OTHER:
 356             verify_flags |= OCSP_TRUSTOTHER;
 357             break;
 358         case OPT_NO_INTERN:
 359             verify_flags |= OCSP_NOINTERN;
 360             break;
 361         case OPT_BADSIG:
 362             badsig = 1;
 363             break;
 364         case OPT_TEXT:
 365             req_text = resp_text = 1;
 366             break;
 367         case OPT_REQ_TEXT:
 368             req_text = 1;
 369             break;
 370         case OPT_RESP_TEXT:
 371             resp_text = 1;
 372             break;
 373         case OPT_REQIN:
 374             reqin = opt_arg();
 375             break;
 376         case OPT_RESPIN:
 377             respin = opt_arg();
 378             break;
 379         case OPT_SIGNER:
 380             signfile = opt_arg();
 381             break;
 382         case OPT_VAFILE:
 383             verify_certfile = opt_arg();
 384             verify_flags |= OCSP_TRUSTOTHER;
 385             break;
 386         case OPT_SIGN_OTHER:
 387             sign_certfile = opt_arg();
 388             break;
 389         case OPT_VERIFY_OTHER:
 390             verify_certfile = opt_arg();
 391             break;
 392         case OPT_CAFILE:
 393             CAfile = opt_arg();
 394             break;
 395         case OPT_CAPATH:
 396             CApath = 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_V_CASES:
 405             if (!opt_verify(o, vpm))
 406                 goto end;
 407             vpmtouched++;
 408             break;
 409         case OPT_VALIDITY_PERIOD:
 410             opt_long(opt_arg(), &nsec);
 411             break;
 412         case OPT_STATUS_AGE:
 413             opt_long(opt_arg(), &maxage);
 414             break;
 415         case OPT_SIGNKEY:
 416             keyfile = opt_arg();
 417             break;
 418         case OPT_REQOUT:
 419             reqout = opt_arg();
 420             break;
 421         case OPT_RESPOUT:
 422             respout = opt_arg();
 423             break;
 424         case OPT_PATH:
 425             path = opt_arg();
 426             break;
 427         case OPT_ISSUER:
 428             issuer = load_cert(opt_arg(), FORMAT_PEM, "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             sk_X509_push(issuers, issuer);
 436             break;
 437         case OPT_CERT:
 438             X509_free(cert);
 439             cert = load_cert(opt_arg(), FORMAT_PEM, "certificate");
 440             if (cert == NULL)
 441                 goto end;
 442             if (cert_id_md == NULL)
 443                 cert_id_md = EVP_sha1();
 444             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 445                 goto end;
 446             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 447                 goto end;
 448             trailing_md = 0;
 449             break;
 450         case OPT_SERIAL:
 451             if (cert_id_md == NULL)
 452                 cert_id_md = EVP_sha1();
 453             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 454                 goto end;
 455             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 456                 goto end;
 457             trailing_md = 0;
 458             break;
 459         case OPT_INDEX:
 460             ridx_filename = opt_arg();
 461             break;
 462         case OPT_CA:
 463             rca_filename = opt_arg();
 464             break;
 465         case OPT_NMIN:
 466             opt_int(opt_arg(), &nmin);
 467             if (ndays == -1)
 468                 ndays = 0;
 469             break;
 470         case OPT_REQUEST:
 471             opt_int(opt_arg(), &accept_count);
 472             break;
 473         case OPT_NDAYS:
 474             ndays = atoi(opt_arg());
 475             break;
 476         case OPT_RSIGNER:
 477             rsignfile = opt_arg();
 478             break;
 479         case OPT_RKEY:
 480             rkeyfile = opt_arg();
 481             break;
 482         case OPT_ROTHER:
 483             rcertfile = opt_arg();
 484             break;
 485         case OPT_RMD:   /* Response MessageDigest */
 486             if (!opt_md(opt_arg(), &rsign_md))
 487                 goto end;
 488             break;
 489         case OPT_RSIGOPT:
 490             if (rsign_sigopts == NULL)
 491                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
 492             if (rsign_sigopts == NULL || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
 493                 goto end;
 494             break;
 495         case OPT_HEADER:
 496             header = opt_arg();
 497             value = strchr(header, '=');
 498             if (value == NULL) {
 499                 BIO_printf(bio_err, "Missing = in header key=value\n");
 500                 goto opthelp;
 501             }
 502             *value++ = '\0';
 503             if (!X509V3_add_value(header, value, &headers))
 504                 goto end;
 505             break;
 506         case OPT_RCID:
 507             resp_certid_md = EVP_get_digestbyname(opt_arg());
 508             if (resp_certid_md == NULL)
 509                 goto opthelp;
 510             break;
 511         case OPT_MD:
 512             if (trailing_md) {
 513                 BIO_printf(bio_err,
 514                            "%s: Digest must be before -cert or -serial\n",
 515                            prog);
 516                 goto opthelp;
 517             }
 518             if (!opt_md(opt_unknown(), &cert_id_md))
 519                 goto opthelp;
 520             trailing_md = 1;
 521             break;
 522         case OPT_MULTI:
 523 # ifdef OCSP_DAEMON
 524             multi = atoi(opt_arg());
 525 # endif
 526             break;
 527         }
 528     }
 529     if (trailing_md) {
 530         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
 531                    prog);
 532         goto opthelp;
 533     }
 534     argc = opt_num_rest();
 535     if (argc != 0)
 536         goto opthelp;
 537
 538     /* Have we anything to do? */
 539     if (req == NULL && reqin == NULL
 540         && respin == NULL && !(port != NULL && ridx_filename != NULL))
 541         goto opthelp;
 542
 543     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 544     if (out == NULL)
 545         goto end;
 546
 547     if (req == NULL && (add_nonce != 2))
 548         add_nonce = 0;
 549
 550     if (req == NULL && reqin != NULL) {
 551         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 552         if (derbio == NULL)
 553             goto end;
 554         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 555         BIO_free(derbio);
 556         if (req == NULL) {
 557             BIO_printf(bio_err, "Error reading OCSP request\n");
 558             goto end;
 559         }
 560     }
 561
 562     if (req == NULL && port != NULL) {
 563         acbio = init_responder(port);
 564         if (acbio == NULL)
 565             goto end;
 566     }
 567
 568     if (rsignfile != NULL) {
 569         if (rkeyfile == NULL)
 570             rkeyfile = rsignfile;
 571         rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
 572         if (rsigner == NULL) {
 573             BIO_printf(bio_err, "Error loading responder certificate\n");
 574             goto end;
 575         }
 576         if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
 577                         NULL, "CA certificate"))
 578             goto end;
 579         if (rcertfile != NULL) {
 580             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
 581                             "responder other certificates"))
 582                 goto end;
 583         }
 584         rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 585                         "responder private key");
 586         if (rkey == NULL)
 587             goto end;
 588     }
 589
 590     if (ridx_filename != NULL
 591         && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
 592         BIO_printf(bio_err,
 593                    "Responder mode requires certificate, key, and CA.\n");
 594         goto end;
 595     }
 596
 597     if (ridx_filename != NULL) {
 598         rdb = load_index(ridx_filename, NULL);
 599         if (rdb == NULL || index_index(rdb) <= 0) {
 600             ret = 1;
 601             goto end;
 602         }
 603     }
 604
 605 # ifdef OCSP_DAEMON
 606     if (multi && acbio != NULL)
 607         spawn_loop();
 608     if (acbio != NULL && req_timeout > 0)
 609         signal(SIGALRM, sock_timeout);
 610 #endif
 611
 612     if (acbio != NULL)
 613         log_message(LOG_INFO, "waiting for OCSP client connections...");
 614
 615 redo_accept:
 616
 617     if (acbio != NULL) {
 618 # ifdef OCSP_DAEMON
 619         if (index_changed(rdb)) {
 620             CA_DB *newrdb = load_index(ridx_filename, NULL);
 621
 622             if (newrdb != NULL && index_index(newrdb) > 0) {
 623                 free_index(rdb);
 624                 rdb = newrdb;
 625             } else {
 626                 free_index(newrdb);
 627                 log_message(LOG_ERR, "error reloading updated index: %s",
 628                             ridx_filename);
 629             }
 630         }
 631 # endif
 632
 633         req = NULL;
 634         if (!do_responder(&req, &cbio, acbio, req_timeout))
 635             goto redo_accept;
 636
 637         if (req == NULL) {
 638             resp =
 639                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 640                                      NULL);
 641             send_ocsp_response(cbio, resp);
 642             goto done_resp;
 643         }
 644     }
 645
 646     if (req == NULL
 647         && (signfile != NULL || reqout != NULL
 648             || host != NULL || add_nonce || ridx_filename != NULL)) {
 649         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 650         goto end;
 651     }
 652
 653     if (req != NULL && add_nonce) {
 654         if (!OCSP_request_add1_nonce(req, NULL, -1))
 655             goto end;
 656     }
 657
 658     if (signfile != NULL) {
 659         if (keyfile == NULL)
 660             keyfile = signfile;
 661         signer = load_cert(signfile, FORMAT_PEM, "signer certificate");
 662         if (signer == NULL) {
 663             BIO_printf(bio_err, "Error loading signer certificate\n");
 664             goto end;
 665         }
 666         if (sign_certfile != NULL) {
 667             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL,
 668                             "signer certificates"))
 669                 goto end;
 670         }
 671         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 672                        "signer private key");
 673         if (key == NULL)
 674             goto end;
 675
 676         if (!OCSP_request_sign
 677             (req, signer, key, NULL, sign_other, sign_flags)) {
 678             BIO_printf(bio_err, "Error signing OCSP request\n");
 679             goto end;
 680         }
 681     }
 682
 683     if (req_text && req != NULL)
 684         OCSP_REQUEST_print(out, req, 0);
 685
 686     if (reqout != NULL) {
 687         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 688         if (derbio == NULL)
 689             goto end;
 690         i2d_OCSP_REQUEST_bio(derbio, req);
 691         BIO_free(derbio);
 692     }
 693
 694     if (rdb != NULL) {
 695         make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
 696                            rsign_md, rsign_sigopts, rother, rflags, nmin, ndays, badsig,
 697                            resp_certid_md);
 698         if (cbio != NULL)
 699             send_ocsp_response(cbio, resp);
 700     } else if (host != NULL) {
 701 # ifndef OPENSSL_NO_SOCK
 702         resp = process_responder(req, host, path,
 703                                  port, use_ssl, headers, req_timeout);
 704         if (resp == NULL)
 705             goto end;
 706 # else
 707         BIO_printf(bio_err,
 708                    "Error creating connect BIO - sockets not supported.\n");
 709         goto end;
 710 # endif
 711     } else if (respin != NULL) {
 712         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 713         if (derbio == NULL)
 714             goto end;
 715         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 716         BIO_free(derbio);
 717         if (resp == NULL) {
 718             BIO_printf(bio_err, "Error reading OCSP response\n");
 719             goto end;
 720         }
 721     } else {
 722         ret = 0;
 723         goto end;
 724     }
 725
 726  done_resp:
 727
 728     if (respout != NULL) {
 729         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 730         if (derbio == NULL)
 731             goto end;
 732         i2d_OCSP_RESPONSE_bio(derbio, resp);
 733         BIO_free(derbio);
 734     }
 735
 736     i = OCSP_response_status(resp);
 737     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 738         BIO_printf(out, "Responder Error: %s (%d)\n",
 739                    OCSP_response_status_str(i), i);
 740         if (!ignore_err)
 741                 goto end;
 742     }
 743
 744     if (resp_text)
 745         OCSP_RESPONSE_print(out, resp, 0);
 746
 747     /* If running as responder don't verify our own response */
 748     if (cbio != NULL) {
 749         /* If not unlimited, see if we took all we should. */
 750         if (accept_count != -1 && --accept_count <= 0) {
 751             ret = 0;
 752             goto end;
 753         }
 754         BIO_free_all(cbio);
 755         cbio = NULL;
 756         OCSP_REQUEST_free(req);
 757         req = NULL;
 758         OCSP_RESPONSE_free(resp);
 759         resp = NULL;
 760         goto redo_accept;
 761     }
 762     if (ridx_filename != NULL) {
 763         ret = 0;
 764         goto end;
 765     }
 766
 767     if (store == NULL) {
 768         store = setup_verify(CAfile, CApath, noCAfile, noCApath);
 769         if (!store)
 770             goto end;
 771     }
 772     if (vpmtouched)
 773         X509_STORE_set1_param(store, vpm);
 774     if (verify_certfile != NULL) {
 775         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
 776                         "validator certificate"))
 777             goto end;
 778     }
 779
 780     bs = OCSP_response_get1_basic(resp);
 781     if (bs == NULL) {
 782         BIO_printf(bio_err, "Error parsing response\n");
 783         goto end;
 784     }
 785
 786     ret = 0;
 787
 788     if (!noverify) {
 789         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 790             if (i == -1)
 791                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 792             else {
 793                 BIO_printf(bio_err, "Nonce Verify error\n");
 794                 ret = 1;
 795                 goto end;
 796             }
 797         }
 798
 799         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 800         if (i <= 0 && issuers) {
 801             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 802             if (i > 0)
 803                 ERR_clear_error();
 804         }
 805         if (i <= 0) {
 806             BIO_printf(bio_err, "Response Verify Failure\n");
 807             ERR_print_errors(bio_err);
 808             ret = 1;
 809         } else {
 810             BIO_printf(bio_err, "Response verify OK\n");
 811         }
 812     }
 813
 814     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 815
 816  end:
 817     ERR_print_errors(bio_err);
 818     X509_free(signer);
 819     X509_STORE_free(store);
 820     X509_VERIFY_PARAM_free(vpm);
 821     sk_OPENSSL_STRING_free(rsign_sigopts);
 822     EVP_PKEY_free(key);
 823     EVP_PKEY_free(rkey);
 824     X509_free(cert);
 825     sk_X509_pop_free(issuers, X509_free);
 826     X509_free(rsigner);
 827     sk_X509_pop_free(rca_cert, X509_free);
 828     free_index(rdb);
 829     BIO_free_all(cbio);
 830     BIO_free_all(acbio);
 831     BIO_free_all(out);
 832     OCSP_REQUEST_free(req);
 833     OCSP_RESPONSE_free(resp);
 834     OCSP_BASICRESP_free(bs);
 835     sk_OPENSSL_STRING_free(reqnames);
 836     sk_OCSP_CERTID_free(ids);
 837     sk_X509_pop_free(sign_other, X509_free);
 838     sk_X509_pop_free(verify_other, X509_free);
 839     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 840     OPENSSL_free(thost);
 841     OPENSSL_free(tport);
 842     OPENSSL_free(tpath);
 843
 844     return ret;
 845 }
 846
 847 static void
 848 log_message(int level, const char *fmt, ...)
 849 {
 850     va_list ap;
 851
 852     va_start(ap, fmt);
 853 # ifdef OCSP_DAEMON
 854     if (multi) {
 855         char buf[1024];
 856         if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
 857             syslog(level, "%s", buf);
 858         }
 859         if (level >= LOG_ERR)
 860             ERR_print_errors_cb(print_syslog, &level);
 861     }
 862 # endif
 863     if (!multi) {
 864         BIO_printf(bio_err, "%s: ", prog);
 865         BIO_vprintf(bio_err, fmt, ap);
 866         BIO_printf(bio_err, "\n");
 867     }
 868     va_end(ap);
 869 }
 870
 871 # ifdef OCSP_DAEMON
 872
 873 static int print_syslog(const char *str, size_t len, void *levPtr)
 874 {
 875     int level = *(int *)levPtr;
 876     int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
 877
 878     syslog(level, "%.*s", ilen, str);
 879
 880     return ilen;
 881 }
 882
 883 static int index_changed(CA_DB *rdb)
 884 {
 885     struct stat sb;
 886
 887     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
 888         if (rdb->dbst.st_mtime != sb.st_mtime
 889             || rdb->dbst.st_ctime != sb.st_ctime
 890             || rdb->dbst.st_ino != sb.st_ino
 891             || rdb->dbst.st_dev != sb.st_dev) {
 892             syslog(LOG_INFO, "index file changed, reloading");
 893             return 1;
 894         }
 895     }
 896     return 0;
 897 }
 898
 899 static void killall(int ret, pid_t *kidpids)
 900 {
 901     int i;
 902
 903     for (i = 0; i < multi; ++i)
 904         if (kidpids[i] != 0)
 905             (void)kill(kidpids[i], SIGTERM);
 906     OPENSSL_free(kidpids);
 907     sleep(1);
 908     exit(ret);
 909 }
 910
 911 static int termsig = 0;
 912
 913 static void noteterm (int sig)
 914 {
 915     termsig = sig;
 916 }
 917
 918 /*
 919  * Loop spawning up to `multi` child processes, only child processes return
 920  * from this function.  The parent process loops until receiving a termination
 921  * signal, kills extant children and exits without returning.
 922  */
 923 static void spawn_loop(void)
 924 {
 925     pid_t *kidpids = NULL;
 926     int status;
 927     int procs = 0;
 928     int i;
 929
 930     openlog(prog, LOG_PID, LOG_DAEMON);
 931
 932     if (setpgid(0, 0)) {
 933         syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
 934                strerror(errno));
 935         exit(1);
 936     }
 937     kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
 938     for (i = 0; i < multi; ++i)
 939         kidpids[i] = 0;
 940
 941     signal(SIGINT, noteterm);
 942     signal(SIGTERM, noteterm);
 943
 944     while (termsig == 0) {
 945         pid_t fpid;
 946
 947         /*
 948          * Wait for a child to replace when we're at the limit.
 949          * Slow down if a child exited abnormally or waitpid() < 0
 950          */
 951         while (termsig == 0 && procs >= multi) {
 952             if ((fpid = waitpid(-1, &status, 0)) > 0) {
 953                 for (i = 0; i < procs; ++i) {
 954                     if (kidpids[i] == fpid) {
 955                         kidpids[i] = 0;
 956                         --procs;
 957                         break;
 958                     }
 959                 }
 960                 if (i >= multi) {
 961                     syslog(LOG_ERR, "fatal: internal error: "
 962                            "no matching child slot for pid: %ld",
 963                            (long) fpid);
 964                     killall(1, kidpids);
 965                 }
 966                 if (status != 0) {
 967                     if (WIFEXITED(status))
 968                         syslog(LOG_WARNING, "child process: %ld, exit status: %d",
 969                                (long)fpid, WEXITSTATUS(status));
 970                     else if (WIFSIGNALED(status))
 971                         syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
 972                                (long)fpid, WTERMSIG(status),
 973 #ifdef WCOREDUMP
 974                                WCOREDUMP(status) ? " (core dumped)" :
 975 #endif
 976                                "");
 977                     sleep(1);
 978                 }
 979                 break;
 980             } else if (errno != EINTR) {
 981                 syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
 982                 killall(1, kidpids);
 983             }
 984         }
 985         if (termsig)
 986             break;
 987
 988         switch(fpid = fork()) {
 989         case -1:            /* error */
 990             /* System critically low on memory, pause and try again later */
 991             sleep(30);
 992             break;
 993         case 0:             /* child */
 994             OPENSSL_free(kidpids);
 995             signal(SIGINT, SIG_DFL);
 996             signal(SIGTERM, SIG_DFL);
 997             if (termsig)
 998                 _exit(0);
 999             if (RAND_poll() <= 0) {
1000                 syslog(LOG_ERR, "fatal: RAND_poll() failed");
1001                 _exit(1);
1002             }
1003             return;
1004         default:            /* parent */
1005             for (i = 0; i < multi; ++i) {
1006                 if (kidpids[i] == 0) {
1007                     kidpids[i] = fpid;
1008                     procs++;
1009                     break;
1010                 }
1011             }
1012             if (i >= multi) {
1013                 syslog(LOG_ERR, "fatal: internal error: no free child slots");
1014                 killall(1, kidpids);
1015             }
1016             break;
1017         }
1018     }
1019
1020     /* The loop above can only break on termsig */
1021     syslog(LOG_INFO, "terminating on signal: %d", termsig);
1022     killall(0, kidpids);
1023 }
1024 # endif
1025
1026 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
1027                          const EVP_MD *cert_id_md, X509 *issuer,
1028                          STACK_OF(OCSP_CERTID) *ids)
1029 {
1030     OCSP_CERTID *id;
1031
1032     if (issuer == NULL) {
1033         BIO_printf(bio_err, "No issuer certificate specified\n");
1034         return 0;
1035     }
1036     if (*req == NULL)
1037         *req = OCSP_REQUEST_new();
1038     if (*req == NULL)
1039         goto err;
1040     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
1041     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1042         goto err;
1043     if (!OCSP_request_add0_id(*req, id))
1044         goto err;
1045     return 1;
1046
1047  err:
1048     BIO_printf(bio_err, "Error Creating OCSP request\n");
1049     return 0;
1050 }
1051
1052 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
1053                            const EVP_MD *cert_id_md, X509 *issuer,
1054                            STACK_OF(OCSP_CERTID) *ids)
1055 {
1056     OCSP_CERTID *id;
1057     X509_NAME *iname;
1058     ASN1_BIT_STRING *ikey;
1059     ASN1_INTEGER *sno;
1060
1061     if (issuer == NULL) {
1062         BIO_printf(bio_err, "No issuer certificate specified\n");
1063         return 0;
1064     }
1065     if (*req == NULL)
1066         *req = OCSP_REQUEST_new();
1067     if (*req == NULL)
1068         goto err;
1069     iname = X509_get_subject_name(issuer);
1070     ikey = X509_get0_pubkey_bitstr(issuer);
1071     sno = s2i_ASN1_INTEGER(NULL, serial);
1072     if (sno == NULL) {
1073         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
1074         return 0;
1075     }
1076     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
1077     ASN1_INTEGER_free(sno);
1078     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1079         goto err;
1080     if (!OCSP_request_add0_id(*req, id))
1081         goto err;
1082     return 1;
1083
1084  err:
1085     BIO_printf(bio_err, "Error Creating OCSP request\n");
1086     return 0;
1087 }
1088
1089 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
1090                               STACK_OF(OPENSSL_STRING) *names,
1091                               STACK_OF(OCSP_CERTID) *ids, long nsec,
1092                               long maxage)
1093 {
1094     OCSP_CERTID *id;
1095     const char *name;
1096     int i, status, reason;
1097     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1098
1099     if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
1100         || !sk_OCSP_CERTID_num(ids))
1101         return;
1102
1103     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
1104         id = sk_OCSP_CERTID_value(ids, i);
1105         name = sk_OPENSSL_STRING_value(names, i);
1106         BIO_printf(out, "%s: ", name);
1107
1108         if (!OCSP_resp_find_status(bs, id, &status, &reason,
1109                                    &rev, &thisupd, &nextupd)) {
1110             BIO_puts(out, "ERROR: No Status found.\n");
1111             continue;
1112         }
1113
1114         /*
1115          * Check validity: if invalid write to output BIO so we know which
1116          * response this refers to.
1117          */
1118         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1119             BIO_puts(out, "WARNING: Status times invalid.\n");
1120             ERR_print_errors(out);
1121         }
1122         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1123
1124         BIO_puts(out, "\tThis Update: ");
1125         ASN1_GENERALIZEDTIME_print(out, thisupd);
1126         BIO_puts(out, "\n");
1127
1128         if (nextupd) {
1129             BIO_puts(out, "\tNext Update: ");
1130             ASN1_GENERALIZEDTIME_print(out, nextupd);
1131             BIO_puts(out, "\n");
1132         }
1133
1134         if (status != V_OCSP_CERTSTATUS_REVOKED)
1135             continue;
1136
1137         if (reason != -1)
1138             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1139
1140         BIO_puts(out, "\tRevocation Time: ");
1141         ASN1_GENERALIZEDTIME_print(out, rev);
1142         BIO_puts(out, "\n");
1143     }
1144 }
1145
1146 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1147                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1148                               EVP_PKEY *rkey, const EVP_MD *rmd,
1149                               STACK_OF(OPENSSL_STRING) *sigopts,
1150                               STACK_OF(X509) *rother, unsigned long flags,
1151                               int nmin, int ndays, int badsig,
1152                               const EVP_MD *resp_md)
1153 {
1154     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1155     OCSP_CERTID *cid;
1156     OCSP_BASICRESP *bs = NULL;
1157     int i, id_count;
1158     EVP_MD_CTX *mctx = NULL;
1159     EVP_PKEY_CTX *pkctx = NULL;
1160
1161     id_count = OCSP_request_onereq_count(req);
1162
1163     if (id_count <= 0) {
1164         *resp =
1165             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1166         goto end;
1167     }
1168
1169     bs = OCSP_BASICRESP_new();
1170     thisupd = X509_gmtime_adj(NULL, 0);
1171     if (ndays != -1)
1172         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1173
1174     /* Examine each certificate id in the request */
1175     for (i = 0; i < id_count; i++) {
1176         OCSP_ONEREQ *one;
1177         ASN1_INTEGER *serial;
1178         char **inf;
1179         int jj;
1180         int found = 0;
1181         ASN1_OBJECT *cert_id_md_oid;
1182         const EVP_MD *cert_id_md;
1183         OCSP_CERTID *cid_resp_md = NULL;
1184
1185         one = OCSP_request_onereq_get0(req, i);
1186         cid = OCSP_onereq_get0_id(one);
1187
1188         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1189
1190         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1191         if (cert_id_md == NULL) {
1192             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1193                                          NULL);
1194             goto end;
1195         }
1196         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1197             X509 *ca_cert = sk_X509_value(ca, jj);
1198             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1199
1200             if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
1201                 found = 1;
1202                 if (resp_md != NULL)
1203                     cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
1204             }
1205             OCSP_CERTID_free(ca_id);
1206         }
1207         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1208         inf = lookup_serial(db, serial);
1209
1210         /* at this point, we can have cid be an alias of cid_resp_md */
1211         cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
1212
1213         if (!found) {
1214             OCSP_basic_add1_status(bs, cid,
1215                                    V_OCSP_CERTSTATUS_UNKNOWN,
1216                                    0, NULL, thisupd, nextupd);
1217             continue;
1218         }
1219         if (inf == NULL) {
1220             OCSP_basic_add1_status(bs, cid,
1221                                    V_OCSP_CERTSTATUS_UNKNOWN,
1222                                    0, NULL, thisupd, nextupd);
1223         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1224             OCSP_basic_add1_status(bs, cid,
1225                                    V_OCSP_CERTSTATUS_GOOD,
1226                                    0, NULL, thisupd, nextupd);
1227         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1228             ASN1_OBJECT *inst = NULL;
1229             ASN1_TIME *revtm = NULL;
1230             ASN1_GENERALIZEDTIME *invtm = NULL;
1231             OCSP_SINGLERESP *single;
1232             int reason = -1;
1233
1234             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1235             single = OCSP_basic_add1_status(bs, cid,
1236                                             V_OCSP_CERTSTATUS_REVOKED,
1237                                             reason, revtm, thisupd, nextupd);
1238             if (invtm != NULL)
1239                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1240                                              invtm, 0, 0);
1241             else if (inst != NULL)
1242                 OCSP_SINGLERESP_add1_ext_i2d(single,
1243                                              NID_hold_instruction_code, inst,
1244                                              0, 0);
1245             ASN1_OBJECT_free(inst);
1246             ASN1_TIME_free(revtm);
1247             ASN1_GENERALIZEDTIME_free(invtm);
1248         }
1249         OCSP_CERTID_free(cid_resp_md);
1250     }
1251
1252     OCSP_copy_nonce(bs, req);
1253
1254     mctx = EVP_MD_CTX_new();
1255     if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1256         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1257         goto end;
1258     }
1259     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1260         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1261
1262         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1263             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1264             ERR_print_errors(bio_err);
1265             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1266                                          NULL);
1267             goto end;
1268         }
1269     }
1270     if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1271         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1272         goto end;
1273     }
1274
1275     if (badsig) {
1276         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1277         corrupt_signature(sig);
1278     }
1279
1280     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1281
1282  end:
1283     EVP_MD_CTX_free(mctx);
1284     ASN1_TIME_free(thisupd);
1285     ASN1_TIME_free(nextupd);
1286     OCSP_BASICRESP_free(bs);
1287 }
1288
1289 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1290 {
1291     int i;
1292     BIGNUM *bn = NULL;
1293     char *itmp, *row[DB_NUMBER], **rrow;
1294     for (i = 0; i < DB_NUMBER; i++)
1295         row[i] = NULL;
1296     bn = ASN1_INTEGER_to_BN(ser, NULL);
1297     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1298                                  * point and abort */
1299     if (BN_is_zero(bn))
1300         itmp = OPENSSL_strdup("00");
1301     else
1302         itmp = BN_bn2hex(bn);
1303     row[DB_serial] = itmp;
1304     BN_free(bn);
1305     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1306     OPENSSL_free(itmp);
1307     return rrow;
1308 }
1309
1310 /* Quick and dirty OCSP server: read in and parse input request */
1311
1312 static BIO *init_responder(const char *port)
1313 {
1314 # ifdef OPENSSL_NO_SOCK
1315     BIO_printf(bio_err,
1316                "Error setting up accept BIO - sockets not supported.\n");
1317     return NULL;
1318 # else
1319     BIO *acbio = NULL, *bufbio = NULL;
1320
1321     bufbio = BIO_new(BIO_f_buffer());
1322     if (bufbio == NULL)
1323         goto err;
1324     acbio = BIO_new(BIO_s_accept());
1325     if (acbio == NULL
1326         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1327         || BIO_set_accept_port(acbio, port) < 0) {
1328         log_message(LOG_ERR, "Error setting up accept BIO");
1329         goto err;
1330     }
1331
1332     BIO_set_accept_bios(acbio, bufbio);
1333     bufbio = NULL;
1334     if (BIO_do_accept(acbio) <= 0) {
1335         log_message(LOG_ERR, "Error starting accept");
1336         goto err;
1337     }
1338
1339     return acbio;
1340
1341  err:
1342     BIO_free_all(acbio);
1343     BIO_free(bufbio);
1344     return NULL;
1345 # endif
1346 }
1347
1348 # ifndef OPENSSL_NO_SOCK
1349 /*
1350  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1351  */
1352 static int urldecode(char *p)
1353 {
1354     unsigned char *out = (unsigned char *)p;
1355     unsigned char *save = out;
1356
1357     for (; *p; p++) {
1358         if (*p != '%')
1359             *out++ = *p;
1360         else if (isxdigit(_UC(p[1])) && isxdigit(_UC(p[2]))) {
1361             /* Don't check, can't fail because of ixdigit() call. */
1362             *out++ = (OPENSSL_hexchar2int(p[1]) << 4)
1363                    | OPENSSL_hexchar2int(p[2]);
1364             p += 2;
1365         }
1366         else
1367             return -1;
1368     }
1369     *out = '\0';
1370     return (int)(out - save);
1371 }
1372 # endif
1373
1374 # ifdef OCSP_DAEMON
1375 static void sock_timeout(int signum)
1376 {
1377     if (acfd != (int)INVALID_SOCKET)
1378         (void)shutdown(acfd, SHUT_RD);
1379 }
1380 # endif
1381
1382 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1383                         int timeout)
1384 {
1385 # ifdef OPENSSL_NO_SOCK
1386     return 0;
1387 # else
1388     int len;
1389     OCSP_REQUEST *req = NULL;
1390     char inbuf[2048], reqbuf[2048];
1391     char *p, *q;
1392     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1393     const char *client;
1394
1395     *preq = NULL;
1396
1397     /* Connection loss before accept() is routine, ignore silently */
1398     if (BIO_do_accept(acbio) <= 0)
1399         return 0;
1400
1401     cbio = BIO_pop(acbio);
1402     *pcbio = cbio;
1403     client = BIO_get_peer_name(cbio);
1404
1405 #  ifdef OCSP_DAEMON
1406     if (timeout > 0) {
1407         (void) BIO_get_fd(cbio, &acfd);
1408         alarm(timeout);
1409     }
1410 #  endif
1411
1412     /* Read the request line. */
1413     len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
1414     if (len <= 0)
1415         goto out;
1416
1417     if (strncmp(reqbuf, "GET ", 4) == 0) {
1418         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1419         for (p = reqbuf + 4; *p == ' '; ++p)
1420             continue;
1421         if (*p != '/') {
1422             log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
1423             goto out;
1424         }
1425         p++;
1426
1427         /* Splice off the HTTP version identifier. */
1428         for (q = p; *q; q++)
1429             if (*q == ' ')
1430                 break;
1431         if (strncmp(q, " HTTP/1.", 8) != 0) {
1432             log_message(LOG_INFO,
1433                         "Invalid request -- bad HTTP version: %s", client);
1434             goto out;
1435         }
1436         *q = '\0';
1437
1438         /*
1439          * Skip "GET / HTTP..." requests often used by load-balancers
1440          */
1441         if (p[1] == '\0')
1442             goto out;
1443
1444         len = urldecode(p);
1445         if (len <= 0) {
1446             log_message(LOG_INFO,
1447                         "Invalid request -- bad URL encoding: %s", client);
1448             goto out;
1449         }
1450         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1451             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1452             log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
1453             goto out;
1454         }
1455         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1456         getbio = BIO_push(b64, getbio);
1457     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1458         log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
1459         goto out;
1460     }
1461
1462     /* Read and skip past the headers. */
1463     for (;;) {
1464         len = BIO_gets(cbio, inbuf, sizeof(inbuf));
1465         if (len <= 0)
1466             goto out;
1467         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1468             break;
1469     }
1470
1471 #  ifdef OCSP_DAEMON
1472     /* Clear alarm before we close the client socket */
1473     alarm(0);
1474     timeout = 0;
1475 #  endif
1476
1477     /* Try to read OCSP request */
1478     if (getbio != NULL) {
1479         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1480         BIO_free_all(getbio);
1481     } else {
1482         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1483     }
1484
1485     if (req == NULL)
1486         log_message(LOG_ERR, "Error parsing OCSP request");
1487
1488     *preq = req;
1489
1490 out:
1491 #  ifdef OCSP_DAEMON
1492     if (timeout > 0)
1493         alarm(0);
1494     acfd = (int)INVALID_SOCKET;
1495 #  endif
1496     return 1;
1497 # endif
1498 }
1499
1500 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1501 {
1502     char http_resp[] =
1503         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1504         "Content-Length: %d\r\n\r\n";
1505     if (cbio == NULL)
1506         return 0;
1507     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1508     i2d_OCSP_RESPONSE_bio(cbio, resp);
1509     (void)BIO_flush(cbio);
1510     return 1;
1511 }
1512
1513 # ifndef OPENSSL_NO_SOCK
1514 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
1515                                       const char *path,
1516                                       const STACK_OF(CONF_VALUE) *headers,
1517                                       OCSP_REQUEST *req, int req_timeout)
1518 {
1519     int fd;
1520     int rv;
1521     int i;
1522     int add_host = 1;
1523     OCSP_REQ_CTX *ctx = NULL;
1524     OCSP_RESPONSE *rsp = NULL;
1525     fd_set confds;
1526     struct timeval tv;
1527
1528     if (req_timeout != -1)
1529         BIO_set_nbio(cbio, 1);
1530
1531     rv = BIO_do_connect(cbio);
1532
1533     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1534         BIO_puts(bio_err, "Error connecting BIO\n");
1535         return NULL;
1536     }
1537
1538     if (BIO_get_fd(cbio, &fd) < 0) {
1539         BIO_puts(bio_err, "Can't get connection fd\n");
1540         goto err;
1541     }
1542
1543     if (req_timeout != -1 && rv <= 0) {
1544         FD_ZERO(&confds);
1545         openssl_fdset(fd, &confds);
1546         tv.tv_usec = 0;
1547         tv.tv_sec = req_timeout;
1548         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1549         if (rv == 0) {
1550             BIO_puts(bio_err, "Timeout on connect\n");
1551             return NULL;
1552         }
1553     }
1554
1555     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1556     if (ctx == NULL)
1557         return NULL;
1558
1559     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1560         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1561         if (add_host == 1 && strcasecmp("host", hdr->name) == 0)
1562             add_host = 0;
1563         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1564             goto err;
1565     }
1566
1567     if (add_host == 1 && OCSP_REQ_CTX_add1_header(ctx, "Host", host) == 0)
1568         goto err;
1569
1570     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1571         goto err;
1572
1573     for (;;) {
1574         rv = OCSP_sendreq_nbio(&rsp, ctx);
1575         if (rv != -1)
1576             break;
1577         if (req_timeout == -1)
1578             continue;
1579         FD_ZERO(&confds);
1580         openssl_fdset(fd, &confds);
1581         tv.tv_usec = 0;
1582         tv.tv_sec = req_timeout;
1583         if (BIO_should_read(cbio)) {
1584             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1585         } else if (BIO_should_write(cbio)) {
1586             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1587         } else {
1588             BIO_puts(bio_err, "Unexpected retry condition\n");
1589             goto err;
1590         }
1591         if (rv == 0) {
1592             BIO_puts(bio_err, "Timeout on request\n");
1593             break;
1594         }
1595         if (rv == -1) {
1596             BIO_puts(bio_err, "Select error\n");
1597             break;
1598         }
1599
1600     }
1601  err:
1602     OCSP_REQ_CTX_free(ctx);
1603
1604     return rsp;
1605 }
1606
1607 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1608                                  const char *host, const char *path,
1609                                  const char *port, int use_ssl,
1610                                  STACK_OF(CONF_VALUE) *headers,
1611                                  int req_timeout)
1612 {
1613     BIO *cbio = NULL;
1614     SSL_CTX *ctx = NULL;
1615     OCSP_RESPONSE *resp = NULL;
1616
1617     cbio = BIO_new_connect(host);
1618     if (cbio == NULL) {
1619         BIO_printf(bio_err, "Error creating connect BIO\n");
1620         goto end;
1621     }
1622     if (port != NULL)
1623         BIO_set_conn_port(cbio, port);
1624     if (use_ssl == 1) {
1625         BIO *sbio;
1626         ctx = SSL_CTX_new(TLS_client_method());
1627         if (ctx == NULL) {
1628             BIO_printf(bio_err, "Error creating SSL context.\n");
1629             goto end;
1630         }
1631         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1632         sbio = BIO_new_ssl(ctx, 1);
1633         cbio = BIO_push(sbio, cbio);
1634     }
1635
1636     resp = query_responder(cbio, host, path, headers, req, req_timeout);
1637     if (resp == NULL)
1638         BIO_printf(bio_err, "Error querying OCSP responder\n");
1639  end:
1640     BIO_free_all(cbio);
1641     SSL_CTX_free(ctx);
1642     return resp;
1643 }
1644 # endif
1645
1646 #endif