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
 104 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 105 static BIO *init_responder(const char *port);
 106 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, int timeout);
 107 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 108 static void log_message(int level, const char *fmt, ...);
 109 static char *prog;
 110 static int multi = 0;
 111
 112 # ifdef OCSP_DAEMON
 113 static int acfd = (int) INVALID_SOCKET;
 114 static int index_changed(CA_DB *);
 115 static void spawn_loop(void);
 116 static int print_syslog(const char *str, size_t len, void *levPtr);
 117 static void sock_timeout(int signum);
 118 # endif
 119
 120 # ifndef OPENSSL_NO_SOCK
 121 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
 122                                       const char *path,
 123                                       const STACK_OF(CONF_VALUE) *headers,
 124                                       OCSP_REQUEST *req, int req_timeout);
 125 # endif
 126
 127 typedef enum OPTION_choice {
 128     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 129     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 130     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 131     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 132     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 133     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 134     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 135     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 136     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH,
 137     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 138     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 139     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 140     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
 141     OPT_V_ENUM,
 142     OPT_MD,
 143     OPT_MULTI
 144 } OPTION_CHOICE;
 145
 146 const OPTIONS ocsp_options[] = {
 147     {"help", OPT_HELP, '-', "Display this summary"},
 148     {"out", OPT_OUTFILE, '>', "Output filename"},
 149     {"timeout", OPT_TIMEOUT, 'p',
 150      "Connection timeout (in seconds) to the OCSP responder"},
 151     {"url", OPT_URL, 's', "Responder URL"},
 152     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
 153     {"port", OPT_PORT, 'p', "Port to run responder on"},
 154     {"ignore_err", OPT_IGNORE_ERR, '-',
 155      "Ignore error on OCSP request or response and continue running"},
 156     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 157     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 158     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 159     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 160      "Don't include any certificates in response"},
 161     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 162      "Identify response by signing certificate key ID"},
 163 # ifdef OCSP_DAEMON
 164     {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
 165 # endif
 166     {"no_certs", OPT_NO_CERTS, '-',
 167      "Don't include any certificates in signed request"},
 168     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 169      "Don't check signature on response"},
 170     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 171      "Don't check signing certificate"},
 172     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 173     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 174      "Don't do additional checks on signing certificate"},
 175     {"no_explicit", OPT_NO_EXPLICIT, '-',
 176      "Do not explicitly check the chain, just verify the root"},
 177     {"trust_other", OPT_TRUST_OTHER, '-',
 178      "Don't verify additional certificates"},
 179     {"no_intern", OPT_NO_INTERN, '-',
 180      "Don't search certificates contained in response for signer"},
 181     {"badsig", OPT_BADSIG, '-',
 182         "Corrupt last byte of loaded OSCP response signature (for test)"},
 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     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 187     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 188     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 189     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 190     {"sign_other", OPT_SIGN_OTHER, '<',
 191      "Additional certificates to include in signed request"},
 192     {"verify_other", OPT_VERIFY_OTHER, '<',
 193      "Additional certificates to search for signer"},
 194     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 195     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 196     {"no-CAfile", OPT_NOCAFILE, '-',
 197      "Do not load the default certificates file"},
 198     {"no-CApath", OPT_NOCAPATH, '-',
 199      "Do not load certificates from the default certificates directory"},
 200     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 201      "Maximum validity discrepancy in seconds"},
 202     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age 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     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 207     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 208     {"cert", OPT_CERT, '<', "Certificate to check"},
 209     {"serial", OPT_SERIAL, 's', "Serial number to check"},
 210     {"index", OPT_INDEX, '<', "Certificate status index file"},
 211     {"CA", OPT_CA, '<', "CA certificate"},
 212     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 213     {"nrequest", OPT_REQUEST, 'p',
 214      "Number of requests to accept (default unlimited)"},
 215     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 216     {"rsigner", OPT_RSIGNER, '<',
 217      "Responder certificate to sign responses with"},
 218     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 219     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 220     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
 221     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
 222     {"header", OPT_HEADER, 's', "key=value header to add"},
 223     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
 224     OPT_V_OPTIONS,
 225     {NULL}
 226 };
 227
 228 int ocsp_main(int argc, char **argv)
 229 {
 230     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 231     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 232     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
 233     int trailing_md = 0;
 234     CA_DB *rdb = NULL;
 235     EVP_PKEY *key = NULL, *rkey = NULL;
 236     OCSP_BASICRESP *bs = NULL;
 237     OCSP_REQUEST *req = NULL;
 238     OCSP_RESPONSE *resp = NULL;
 239     STACK_OF(CONF_VALUE) *headers = NULL;
 240     STACK_OF(OCSP_CERTID) *ids = NULL;
 241     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 242     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 243     STACK_OF(X509) *issuers = NULL;
 244     X509 *issuer = NULL, *cert = NULL;
 245     STACK_OF(X509) *rca_cert = NULL;
 246     X509 *signer = NULL, *rsigner = NULL;
 247     X509_STORE *store = NULL;
 248     X509_VERIFY_PARAM *vpm = NULL;
 249     const char *CAfile = NULL, *CApath = NULL;
 250     char *header, *value;
 251     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 252     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 253     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 254     char *rsignfile = NULL, *rkeyfile = NULL;
 255     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 256     char *signfile = NULL, *keyfile = NULL;
 257     char *thost = NULL, *tport = NULL, *tpath = NULL;
 258     int noCAfile = 0, noCApath = 0;
 259     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 260     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 261     int req_text = 0, resp_text = 0, ret = 1;
 262     int req_timeout = -1;
 263     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 264     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 265     OPTION_CHOICE o;
 266
 267     reqnames = sk_OPENSSL_STRING_new_null();
 268     if (reqnames == NULL)
 269         goto end;
 270     ids = sk_OCSP_CERTID_new_null();
 271     if (ids == NULL)
 272         goto end;
 273     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 274         return 1;
 275
 276     prog = opt_init(argc, argv, ocsp_options);
 277     while ((o = opt_next()) != OPT_EOF) {
 278         switch (o) {
 279         case OPT_EOF:
 280         case OPT_ERR:
 281  opthelp:
 282             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 283             goto end;
 284         case OPT_HELP:
 285             ret = 0;
 286             opt_help(ocsp_options);
 287             goto end;
 288         case OPT_OUTFILE:
 289             outfile = opt_arg();
 290             break;
 291         case OPT_TIMEOUT:
 292 #ifndef OPENSSL_NO_SOCK
 293             req_timeout = atoi(opt_arg());
 294 #endif
 295             break;
 296         case OPT_URL:
 297             OPENSSL_free(thost);
 298             OPENSSL_free(tport);
 299             OPENSSL_free(tpath);
 300             thost = tport = tpath = NULL;
 301             if (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
 302                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 303                 goto end;
 304             }
 305             thost = host;
 306             tport = port;
 307             tpath = path;
 308             break;
 309         case OPT_HOST:
 310             host = opt_arg();
 311             break;
 312         case OPT_PORT:
 313             port = opt_arg();
 314             break;
 315         case OPT_IGNORE_ERR:
 316             ignore_err = 1;
 317             break;
 318         case OPT_NOVERIFY:
 319             noverify = 1;
 320             break;
 321         case OPT_NONCE:
 322             add_nonce = 2;
 323             break;
 324         case OPT_NO_NONCE:
 325             add_nonce = 0;
 326             break;
 327         case OPT_RESP_NO_CERTS:
 328             rflags |= OCSP_NOCERTS;
 329             break;
 330         case OPT_RESP_KEY_ID:
 331             rflags |= OCSP_RESPID_KEY;
 332             break;
 333         case OPT_NO_CERTS:
 334             sign_flags |= OCSP_NOCERTS;
 335             break;
 336         case OPT_NO_SIGNATURE_VERIFY:
 337             verify_flags |= OCSP_NOSIGS;
 338             break;
 339         case OPT_NO_CERT_VERIFY:
 340             verify_flags |= OCSP_NOVERIFY;
 341             break;
 342         case OPT_NO_CHAIN:
 343             verify_flags |= OCSP_NOCHAIN;
 344             break;
 345         case OPT_NO_CERT_CHECKS:
 346             verify_flags |= OCSP_NOCHECKS;
 347             break;
 348         case OPT_NO_EXPLICIT:
 349             verify_flags |= OCSP_NOEXPLICIT;
 350             break;
 351         case OPT_TRUST_OTHER:
 352             verify_flags |= OCSP_TRUSTOTHER;
 353             break;
 354         case OPT_NO_INTERN:
 355             verify_flags |= OCSP_NOINTERN;
 356             break;
 357         case OPT_BADSIG:
 358             badsig = 1;
 359             break;
 360         case OPT_TEXT:
 361             req_text = resp_text = 1;
 362             break;
 363         case OPT_REQ_TEXT:
 364             req_text = 1;
 365             break;
 366         case OPT_RESP_TEXT:
 367             resp_text = 1;
 368             break;
 369         case OPT_REQIN:
 370             reqin = opt_arg();
 371             break;
 372         case OPT_RESPIN:
 373             respin = opt_arg();
 374             break;
 375         case OPT_SIGNER:
 376             signfile = opt_arg();
 377             break;
 378         case OPT_VAFILE:
 379             verify_certfile = opt_arg();
 380             verify_flags |= OCSP_TRUSTOTHER;
 381             break;
 382         case OPT_SIGN_OTHER:
 383             sign_certfile = opt_arg();
 384             break;
 385         case OPT_VERIFY_OTHER:
 386             verify_certfile = opt_arg();
 387             break;
 388         case OPT_CAFILE:
 389             CAfile = opt_arg();
 390             break;
 391         case OPT_CAPATH:
 392             CApath = opt_arg();
 393             break;
 394         case OPT_NOCAFILE:
 395             noCAfile = 1;
 396             break;
 397         case OPT_NOCAPATH:
 398             noCApath = 1;
 399             break;
 400         case OPT_V_CASES:
 401             if (!opt_verify(o, vpm))
 402                 goto end;
 403             vpmtouched++;
 404             break;
 405         case OPT_VALIDITY_PERIOD:
 406             opt_long(opt_arg(), &nsec);
 407             break;
 408         case OPT_STATUS_AGE:
 409             opt_long(opt_arg(), &maxage);
 410             break;
 411         case OPT_SIGNKEY:
 412             keyfile = opt_arg();
 413             break;
 414         case OPT_REQOUT:
 415             reqout = opt_arg();
 416             break;
 417         case OPT_RESPOUT:
 418             respout = opt_arg();
 419             break;
 420         case OPT_PATH:
 421             path = opt_arg();
 422             break;
 423         case OPT_ISSUER:
 424             issuer = load_cert(opt_arg(), FORMAT_PEM, "issuer certificate");
 425             if (issuer == NULL)
 426                 goto end;
 427             if (issuers == NULL) {
 428                 if ((issuers = sk_X509_new_null()) == NULL)
 429                     goto end;
 430             }
 431             sk_X509_push(issuers, issuer);
 432             break;
 433         case OPT_CERT:
 434             X509_free(cert);
 435             cert = load_cert(opt_arg(), FORMAT_PEM, "certificate");
 436             if (cert == NULL)
 437                 goto end;
 438             if (cert_id_md == NULL)
 439                 cert_id_md = EVP_sha1();
 440             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 441                 goto end;
 442             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 443                 goto end;
 444             trailing_md = 0;
 445             break;
 446         case OPT_SERIAL:
 447             if (cert_id_md == NULL)
 448                 cert_id_md = EVP_sha1();
 449             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 450                 goto end;
 451             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 452                 goto end;
 453             trailing_md = 0;
 454             break;
 455         case OPT_INDEX:
 456             ridx_filename = opt_arg();
 457             break;
 458         case OPT_CA:
 459             rca_filename = opt_arg();
 460             break;
 461         case OPT_NMIN:
 462             opt_int(opt_arg(), &nmin);
 463             if (ndays == -1)
 464                 ndays = 0;
 465             break;
 466         case OPT_REQUEST:
 467             opt_int(opt_arg(), &accept_count);
 468             break;
 469         case OPT_NDAYS:
 470             ndays = atoi(opt_arg());
 471             break;
 472         case OPT_RSIGNER:
 473             rsignfile = opt_arg();
 474             break;
 475         case OPT_RKEY:
 476             rkeyfile = opt_arg();
 477             break;
 478         case OPT_ROTHER:
 479             rcertfile = opt_arg();
 480             break;
 481         case OPT_RMD:   /* Response MessageDigest */
 482             if (!opt_md(opt_arg(), &rsign_md))
 483                 goto end;
 484             break;
 485         case OPT_RSIGOPT:
 486             if (rsign_sigopts == NULL)
 487                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
 488             if (rsign_sigopts == NULL || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
 489                 goto end;
 490             break;
 491         case OPT_HEADER:
 492             header = opt_arg();
 493             value = strchr(header, '=');
 494             if (value == NULL) {
 495                 BIO_printf(bio_err, "Missing = in header key=value\n");
 496                 goto opthelp;
 497             }
 498             *value++ = '\0';
 499             if (!X509V3_add_value(header, value, &headers))
 500                 goto end;
 501             break;
 502         case OPT_MD:
 503             if (trailing_md) {
 504                 BIO_printf(bio_err,
 505                            "%s: Digest must be before -cert or -serial\n",
 506                            prog);
 507                 goto opthelp;
 508             }
 509             if (!opt_md(opt_unknown(), &cert_id_md))
 510                 goto opthelp;
 511             trailing_md = 1;
 512             break;
 513         case OPT_MULTI:
 514 # ifdef OCSP_DAEMON
 515             multi = atoi(opt_arg());
 516 # endif
 517             break;
 518         }
 519     }
 520     if (trailing_md) {
 521         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
 522                    prog);
 523         goto opthelp;
 524     }
 525     argc = opt_num_rest();
 526     if (argc != 0)
 527         goto opthelp;
 528
 529     /* Have we anything to do? */
 530     if (req == NULL && reqin == NULL
 531         && respin == NULL && !(port != NULL && ridx_filename != NULL))
 532         goto opthelp;
 533
 534     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 535     if (out == NULL)
 536         goto end;
 537
 538     if (req == NULL && (add_nonce != 2))
 539         add_nonce = 0;
 540
 541     if (req == NULL && reqin != NULL) {
 542         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 543         if (derbio == NULL)
 544             goto end;
 545         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 546         BIO_free(derbio);
 547         if (req == NULL) {
 548             BIO_printf(bio_err, "Error reading OCSP request\n");
 549             goto end;
 550         }
 551     }
 552
 553     if (req == NULL && port != NULL) {
 554         acbio = init_responder(port);
 555         if (acbio == NULL)
 556             goto end;
 557     }
 558
 559     if (rsignfile != NULL) {
 560         if (rkeyfile == NULL)
 561             rkeyfile = rsignfile;
 562         rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
 563         if (rsigner == NULL) {
 564             BIO_printf(bio_err, "Error loading responder certificate\n");
 565             goto end;
 566         }
 567         if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
 568                         NULL, "CA certificate"))
 569             goto end;
 570         if (rcertfile != NULL) {
 571             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
 572                             "responder other certificates"))
 573                 goto end;
 574         }
 575         rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 576                         "responder private key");
 577         if (rkey == NULL)
 578             goto end;
 579     }
 580
 581     if (ridx_filename != NULL
 582         && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
 583         BIO_printf(bio_err,
 584                    "Responder mode requires certificate, key, and CA.\n");
 585         goto end;
 586     }
 587
 588     if (ridx_filename != NULL) {
 589         rdb = load_index(ridx_filename, NULL);
 590         if (rdb == NULL || index_index(rdb) <= 0) {
 591             ret = 1;
 592             goto end;
 593         }
 594     }
 595
 596 # ifdef OCSP_DAEMON
 597     if (multi && acbio != NULL)
 598         spawn_loop();
 599     if (acbio != NULL && req_timeout > 0)
 600         signal(SIGALRM, sock_timeout);
 601 #endif
 602
 603     if (acbio != NULL)
 604         log_message(LOG_INFO, "waiting for OCSP client connections...");
 605
 606 redo_accept:
 607
 608     if (acbio != NULL) {
 609 # ifdef OCSP_DAEMON
 610         if (index_changed(rdb)) {
 611             CA_DB *newrdb = load_index(ridx_filename, NULL);
 612
 613             if (newrdb != NULL && index_index(newrdb) > 0) {
 614                 free_index(rdb);
 615                 rdb = newrdb;
 616             } else {
 617                 free_index(newrdb);
 618                 log_message(LOG_ERR, "error reloading updated index: %s",
 619                             ridx_filename);
 620             }
 621         }
 622 # endif
 623
 624         req = NULL;
 625         if (!do_responder(&req, &cbio, acbio, req_timeout))
 626             goto redo_accept;
 627
 628         if (req == NULL) {
 629             resp =
 630                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 631                                      NULL);
 632             send_ocsp_response(cbio, resp);
 633             goto done_resp;
 634         }
 635     }
 636
 637     if (req == NULL
 638         && (signfile != NULL || reqout != NULL
 639             || host != NULL || add_nonce || ridx_filename != NULL)) {
 640         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 641         goto end;
 642     }
 643
 644     if (req != NULL && add_nonce) {
 645         if (!OCSP_request_add1_nonce(req, NULL, -1))
 646             goto end;
 647     }
 648
 649     if (signfile != NULL) {
 650         if (keyfile == NULL)
 651             keyfile = signfile;
 652         signer = load_cert(signfile, FORMAT_PEM, "signer certificate");
 653         if (signer == NULL) {
 654             BIO_printf(bio_err, "Error loading signer certificate\n");
 655             goto end;
 656         }
 657         if (sign_certfile != NULL) {
 658             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL,
 659                             "signer certificates"))
 660                 goto end;
 661         }
 662         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 663                        "signer private key");
 664         if (key == NULL)
 665             goto end;
 666
 667         if (!OCSP_request_sign
 668             (req, signer, key, NULL, sign_other, sign_flags)) {
 669             BIO_printf(bio_err, "Error signing OCSP request\n");
 670             goto end;
 671         }
 672     }
 673
 674     if (req_text && req != NULL)
 675         OCSP_REQUEST_print(out, req, 0);
 676
 677     if (reqout != NULL) {
 678         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 679         if (derbio == NULL)
 680             goto end;
 681         i2d_OCSP_REQUEST_bio(derbio, req);
 682         BIO_free(derbio);
 683     }
 684
 685     if (rdb != NULL) {
 686         make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
 687                                rsign_md, rsign_sigopts, rother, rflags, nmin, ndays, badsig);
 688         if (cbio != NULL)
 689             send_ocsp_response(cbio, resp);
 690     } else if (host != NULL) {
 691 # ifndef OPENSSL_NO_SOCK
 692         resp = process_responder(req, host, path,
 693                                  port, use_ssl, headers, req_timeout);
 694         if (resp == NULL)
 695             goto end;
 696 # else
 697         BIO_printf(bio_err,
 698                    "Error creating connect BIO - sockets not supported.\n");
 699         goto end;
 700 # endif
 701     } else if (respin != NULL) {
 702         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 703         if (derbio == NULL)
 704             goto end;
 705         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 706         BIO_free(derbio);
 707         if (resp == NULL) {
 708             BIO_printf(bio_err, "Error reading OCSP response\n");
 709             goto end;
 710         }
 711     } else {
 712         ret = 0;
 713         goto end;
 714     }
 715
 716  done_resp:
 717
 718     if (respout != NULL) {
 719         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 720         if (derbio == NULL)
 721             goto end;
 722         i2d_OCSP_RESPONSE_bio(derbio, resp);
 723         BIO_free(derbio);
 724     }
 725
 726     i = OCSP_response_status(resp);
 727     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 728         BIO_printf(out, "Responder Error: %s (%d)\n",
 729                    OCSP_response_status_str(i), i);
 730         if (!ignore_err)
 731                 goto end;
 732     }
 733
 734     if (resp_text)
 735         OCSP_RESPONSE_print(out, resp, 0);
 736
 737     /* If running as responder don't verify our own response */
 738     if (cbio != NULL) {
 739         /* If not unlimited, see if we took all we should. */
 740         if (accept_count != -1 && --accept_count <= 0) {
 741             ret = 0;
 742             goto end;
 743         }
 744         BIO_free_all(cbio);
 745         cbio = NULL;
 746         OCSP_REQUEST_free(req);
 747         req = NULL;
 748         OCSP_RESPONSE_free(resp);
 749         resp = NULL;
 750         goto redo_accept;
 751     }
 752     if (ridx_filename != NULL) {
 753         ret = 0;
 754         goto end;
 755     }
 756
 757     if (store == NULL) {
 758         store = setup_verify(CAfile, CApath, noCAfile, noCApath);
 759         if (!store)
 760             goto end;
 761     }
 762     if (vpmtouched)
 763         X509_STORE_set1_param(store, vpm);
 764     if (verify_certfile != NULL) {
 765         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
 766                         "validator certificate"))
 767             goto end;
 768     }
 769
 770     bs = OCSP_response_get1_basic(resp);
 771     if (bs == NULL) {
 772         BIO_printf(bio_err, "Error parsing response\n");
 773         goto end;
 774     }
 775
 776     ret = 0;
 777
 778     if (!noverify) {
 779         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 780             if (i == -1)
 781                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 782             else {
 783                 BIO_printf(bio_err, "Nonce Verify error\n");
 784                 ret = 1;
 785                 goto end;
 786             }
 787         }
 788
 789         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 790         if (i <= 0 && issuers) {
 791             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 792             if (i > 0)
 793                 ERR_clear_error();
 794         }
 795         if (i <= 0) {
 796             BIO_printf(bio_err, "Response Verify Failure\n");
 797             ERR_print_errors(bio_err);
 798             ret = 1;
 799         } else {
 800             BIO_printf(bio_err, "Response verify OK\n");
 801         }
 802     }
 803
 804     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 805
 806  end:
 807     ERR_print_errors(bio_err);
 808     X509_free(signer);
 809     X509_STORE_free(store);
 810     X509_VERIFY_PARAM_free(vpm);
 811     sk_OPENSSL_STRING_free(rsign_sigopts);
 812     EVP_PKEY_free(key);
 813     EVP_PKEY_free(rkey);
 814     X509_free(cert);
 815     sk_X509_pop_free(issuers, X509_free);
 816     X509_free(rsigner);
 817     sk_X509_pop_free(rca_cert, X509_free);
 818     free_index(rdb);
 819     BIO_free_all(cbio);
 820     BIO_free_all(acbio);
 821     BIO_free_all(out);
 822     OCSP_REQUEST_free(req);
 823     OCSP_RESPONSE_free(resp);
 824     OCSP_BASICRESP_free(bs);
 825     sk_OPENSSL_STRING_free(reqnames);
 826     sk_OCSP_CERTID_free(ids);
 827     sk_X509_pop_free(sign_other, X509_free);
 828     sk_X509_pop_free(verify_other, X509_free);
 829     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 830     OPENSSL_free(thost);
 831     OPENSSL_free(tport);
 832     OPENSSL_free(tpath);
 833
 834     return ret;
 835 }
 836
 837 static void
 838 log_message(int level, const char *fmt, ...)
 839 {
 840     va_list ap;
 841
 842     va_start(ap, fmt);
 843 # ifdef OCSP_DAEMON
 844     if (multi) {
 845         char buf[1024];
 846         if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
 847             syslog(level, "%s", buf);
 848         }
 849         if (level >= LOG_ERR)
 850             ERR_print_errors_cb(print_syslog, &level);
 851     }
 852 # endif
 853     if (!multi) {
 854         BIO_printf(bio_err, "%s: ", prog);
 855         BIO_vprintf(bio_err, fmt, ap);
 856         BIO_printf(bio_err, "\n");
 857     }
 858     va_end(ap);
 859 }
 860
 861 # ifdef OCSP_DAEMON
 862
 863 static int print_syslog(const char *str, size_t len, void *levPtr)
 864 {
 865     int level = *(int *)levPtr;
 866     int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
 867
 868     syslog(level, "%.*s", ilen, str);
 869
 870     return ilen;
 871 }
 872
 873 static int index_changed(CA_DB *rdb)
 874 {
 875     struct stat sb;
 876
 877     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
 878         if (rdb->dbst.st_mtime != sb.st_mtime
 879             || rdb->dbst.st_ctime != sb.st_ctime
 880             || rdb->dbst.st_ino != sb.st_ino
 881             || rdb->dbst.st_dev != sb.st_dev) {
 882             syslog(LOG_INFO, "index file changed, reloading");
 883             return 1;
 884         }
 885     }
 886     return 0;
 887 }
 888
 889 static void killall(int ret, pid_t *kidpids)
 890 {
 891     int i;
 892
 893     for (i = 0; i < multi; ++i)
 894         if (kidpids[i] != 0)
 895             (void)kill(kidpids[i], SIGTERM);
 896     OPENSSL_free(kidpids);
 897     sleep(1);
 898     exit(ret);
 899 }
 900
 901 static int termsig = 0;
 902
 903 static void noteterm (int sig)
 904 {
 905     termsig = sig;
 906 }
 907
 908 /*
 909  * Loop spawning up to `multi` child processes, only child processes return
 910  * from this function.  The parent process loops until receiving a termination
 911  * signal, kills extant children and exits without returning.
 912  */
 913 static void spawn_loop(void)
 914 {
 915     pid_t *kidpids = NULL;
 916     int status;
 917     int procs = 0;
 918     int i;
 919
 920     openlog(prog, LOG_PID, LOG_DAEMON);
 921
 922     if (setpgid(0, 0)) {
 923         syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
 924                strerror(errno));
 925         exit(1);
 926     }
 927     kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
 928     for (i = 0; i < multi; ++i)
 929         kidpids[i] = 0;
 930
 931     signal(SIGINT, noteterm);
 932     signal(SIGTERM, noteterm);
 933
 934     while (termsig == 0) {
 935         pid_t fpid;
 936
 937         /*
 938          * Wait for a child to replace when we're at the limit.
 939          * Slow down if a child exited abnormally or waitpid() < 0
 940          */
 941         while (termsig == 0 && procs >= multi) {
 942             if ((fpid = waitpid(-1, &status, 0)) > 0) {
 943                 for (i = 0; i < procs; ++i) {
 944                     if (kidpids[i] == fpid) {
 945                         kidpids[i] = 0;
 946                         --procs;
 947                         break;
 948                     }
 949                 }
 950                 if (i >= multi) {
 951                     syslog(LOG_ERR, "fatal: internal error: "
 952                            "no matching child slot for pid: %ld",
 953                            (long) fpid);
 954                     killall(1, kidpids);
 955                 }
 956                 if (status != 0) {
 957                     if (WIFEXITED(status))
 958                         syslog(LOG_WARNING, "child process: %ld, exit status: %d",
 959                                (long)fpid, WEXITSTATUS(status));
 960                     else if (WIFSIGNALED(status))
 961                         syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
 962                                (long)fpid, WTERMSIG(status),
 963 #ifdef WCOREDUMP
 964                                WCOREDUMP(status) ? " (core dumped)" :
 965 #endif
 966                                "");
 967                     sleep(1);
 968                 }
 969                 break;
 970             } else if (errno != EINTR) {
 971                 syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
 972                 killall(1, kidpids);
 973             }
 974         }
 975         if (termsig)
 976             break;
 977
 978         switch(fpid = fork()) {
 979         case -1:            /* error */
 980             /* System critically low on memory, pause and try again later */
 981             sleep(30);
 982             break;
 983         case 0:             /* child */
 984             OPENSSL_free(kidpids);
 985             signal(SIGINT, SIG_DFL);
 986             signal(SIGTERM, SIG_DFL);
 987             if (termsig)
 988                 _exit(0);
 989             if (RAND_poll() <= 0) {
 990                 syslog(LOG_ERR, "fatal: RAND_poll() failed");
 991                 _exit(1);
 992             }
 993             return;
 994         default:            /* parent */
 995             for (i = 0; i < multi; ++i) {
 996                 if (kidpids[i] == 0) {
 997                     kidpids[i] = fpid;
 998                     procs++;
 999                     break;
1000                 }
1001             }
1002             if (i >= multi) {
1003                 syslog(LOG_ERR, "fatal: internal error: no free child slots");
1004                 killall(1, kidpids);
1005             }
1006             break;
1007         }
1008     }
1009
1010     /* The loop above can only break on termsig */
1011     syslog(LOG_INFO, "terminating on signal: %d", termsig);
1012     killall(0, kidpids);
1013 }
1014 # endif
1015
1016 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
1017                          const EVP_MD *cert_id_md, X509 *issuer,
1018                          STACK_OF(OCSP_CERTID) *ids)
1019 {
1020     OCSP_CERTID *id;
1021
1022     if (issuer == NULL) {
1023         BIO_printf(bio_err, "No issuer certificate specified\n");
1024         return 0;
1025     }
1026     if (*req == NULL)
1027         *req = OCSP_REQUEST_new();
1028     if (*req == NULL)
1029         goto err;
1030     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
1031     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1032         goto err;
1033     if (!OCSP_request_add0_id(*req, id))
1034         goto err;
1035     return 1;
1036
1037  err:
1038     BIO_printf(bio_err, "Error Creating OCSP request\n");
1039     return 0;
1040 }
1041
1042 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
1043                            const EVP_MD *cert_id_md, X509 *issuer,
1044                            STACK_OF(OCSP_CERTID) *ids)
1045 {
1046     OCSP_CERTID *id;
1047     X509_NAME *iname;
1048     ASN1_BIT_STRING *ikey;
1049     ASN1_INTEGER *sno;
1050
1051     if (issuer == NULL) {
1052         BIO_printf(bio_err, "No issuer certificate specified\n");
1053         return 0;
1054     }
1055     if (*req == NULL)
1056         *req = OCSP_REQUEST_new();
1057     if (*req == NULL)
1058         goto err;
1059     iname = X509_get_subject_name(issuer);
1060     ikey = X509_get0_pubkey_bitstr(issuer);
1061     sno = s2i_ASN1_INTEGER(NULL, serial);
1062     if (sno == NULL) {
1063         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
1064         return 0;
1065     }
1066     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
1067     ASN1_INTEGER_free(sno);
1068     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1069         goto err;
1070     if (!OCSP_request_add0_id(*req, id))
1071         goto err;
1072     return 1;
1073
1074  err:
1075     BIO_printf(bio_err, "Error Creating OCSP request\n");
1076     return 0;
1077 }
1078
1079 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
1080                               STACK_OF(OPENSSL_STRING) *names,
1081                               STACK_OF(OCSP_CERTID) *ids, long nsec,
1082                               long maxage)
1083 {
1084     OCSP_CERTID *id;
1085     const char *name;
1086     int i, status, reason;
1087     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1088
1089     if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
1090         || !sk_OCSP_CERTID_num(ids))
1091         return;
1092
1093     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
1094         id = sk_OCSP_CERTID_value(ids, i);
1095         name = sk_OPENSSL_STRING_value(names, i);
1096         BIO_printf(out, "%s: ", name);
1097
1098         if (!OCSP_resp_find_status(bs, id, &status, &reason,
1099                                    &rev, &thisupd, &nextupd)) {
1100             BIO_puts(out, "ERROR: No Status found.\n");
1101             continue;
1102         }
1103
1104         /*
1105          * Check validity: if invalid write to output BIO so we know which
1106          * response this refers to.
1107          */
1108         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1109             BIO_puts(out, "WARNING: Status times invalid.\n");
1110             ERR_print_errors(out);
1111         }
1112         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1113
1114         BIO_puts(out, "\tThis Update: ");
1115         ASN1_GENERALIZEDTIME_print(out, thisupd);
1116         BIO_puts(out, "\n");
1117
1118         if (nextupd) {
1119             BIO_puts(out, "\tNext Update: ");
1120             ASN1_GENERALIZEDTIME_print(out, nextupd);
1121             BIO_puts(out, "\n");
1122         }
1123
1124         if (status != V_OCSP_CERTSTATUS_REVOKED)
1125             continue;
1126
1127         if (reason != -1)
1128             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1129
1130         BIO_puts(out, "\tRevocation Time: ");
1131         ASN1_GENERALIZEDTIME_print(out, rev);
1132         BIO_puts(out, "\n");
1133     }
1134 }
1135
1136 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1137                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1138                               EVP_PKEY *rkey, const EVP_MD *rmd,
1139                               STACK_OF(OPENSSL_STRING) *sigopts,
1140                               STACK_OF(X509) *rother, unsigned long flags,
1141                               int nmin, int ndays, int badsig)
1142 {
1143     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1144     OCSP_CERTID *cid;
1145     OCSP_BASICRESP *bs = NULL;
1146     int i, id_count;
1147     EVP_MD_CTX *mctx = NULL;
1148     EVP_PKEY_CTX *pkctx = NULL;
1149
1150     id_count = OCSP_request_onereq_count(req);
1151
1152     if (id_count <= 0) {
1153         *resp =
1154             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1155         goto end;
1156     }
1157
1158     bs = OCSP_BASICRESP_new();
1159     thisupd = X509_gmtime_adj(NULL, 0);
1160     if (ndays != -1)
1161         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1162
1163     /* Examine each certificate id in the request */
1164     for (i = 0; i < id_count; i++) {
1165         OCSP_ONEREQ *one;
1166         ASN1_INTEGER *serial;
1167         char **inf;
1168         int jj;
1169         int found = 0;
1170         ASN1_OBJECT *cert_id_md_oid;
1171         const EVP_MD *cert_id_md;
1172         one = OCSP_request_onereq_get0(req, i);
1173         cid = OCSP_onereq_get0_id(one);
1174
1175         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1176
1177         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1178         if (cert_id_md == NULL) {
1179             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1180                                          NULL);
1181             goto end;
1182         }
1183         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1184             X509 *ca_cert = sk_X509_value(ca, jj);
1185             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1186
1187             if (OCSP_id_issuer_cmp(ca_id, cid) == 0)
1188                 found = 1;
1189
1190             OCSP_CERTID_free(ca_id);
1191         }
1192
1193         if (!found) {
1194             OCSP_basic_add1_status(bs, cid,
1195                                    V_OCSP_CERTSTATUS_UNKNOWN,
1196                                    0, NULL, thisupd, nextupd);
1197             continue;
1198         }
1199         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1200         inf = lookup_serial(db, serial);
1201         if (inf == NULL) {
1202             OCSP_basic_add1_status(bs, cid,
1203                                    V_OCSP_CERTSTATUS_UNKNOWN,
1204                                    0, NULL, thisupd, nextupd);
1205         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1206             OCSP_basic_add1_status(bs, cid,
1207                                    V_OCSP_CERTSTATUS_GOOD,
1208                                    0, NULL, thisupd, nextupd);
1209         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1210             ASN1_OBJECT *inst = NULL;
1211             ASN1_TIME *revtm = NULL;
1212             ASN1_GENERALIZEDTIME *invtm = NULL;
1213             OCSP_SINGLERESP *single;
1214             int reason = -1;
1215             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1216             single = OCSP_basic_add1_status(bs, cid,
1217                                             V_OCSP_CERTSTATUS_REVOKED,
1218                                             reason, revtm, thisupd, nextupd);
1219             if (invtm != NULL)
1220                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1221                                              invtm, 0, 0);
1222             else if (inst != NULL)
1223                 OCSP_SINGLERESP_add1_ext_i2d(single,
1224                                              NID_hold_instruction_code, inst,
1225                                              0, 0);
1226             ASN1_OBJECT_free(inst);
1227             ASN1_TIME_free(revtm);
1228             ASN1_GENERALIZEDTIME_free(invtm);
1229         }
1230     }
1231
1232     OCSP_copy_nonce(bs, req);
1233
1234     mctx = EVP_MD_CTX_new();
1235     if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1236         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1237         goto end;
1238     }
1239     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1240         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1241
1242         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1243             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1244             ERR_print_errors(bio_err);
1245             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1246                                          NULL);
1247             goto end;
1248         }
1249     }
1250     if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1251         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1252         goto end;
1253     }
1254
1255     if (badsig) {
1256         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1257         corrupt_signature(sig);
1258     }
1259
1260     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1261
1262  end:
1263     EVP_MD_CTX_free(mctx);
1264     ASN1_TIME_free(thisupd);
1265     ASN1_TIME_free(nextupd);
1266     OCSP_BASICRESP_free(bs);
1267 }
1268
1269 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1270 {
1271     int i;
1272     BIGNUM *bn = NULL;
1273     char *itmp, *row[DB_NUMBER], **rrow;
1274     for (i = 0; i < DB_NUMBER; i++)
1275         row[i] = NULL;
1276     bn = ASN1_INTEGER_to_BN(ser, NULL);
1277     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1278                                  * point and abort */
1279     if (BN_is_zero(bn))
1280         itmp = OPENSSL_strdup("00");
1281     else
1282         itmp = BN_bn2hex(bn);
1283     row[DB_serial] = itmp;
1284     BN_free(bn);
1285     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1286     OPENSSL_free(itmp);
1287     return rrow;
1288 }
1289
1290 /* Quick and dirty OCSP server: read in and parse input request */
1291
1292 static BIO *init_responder(const char *port)
1293 {
1294 # ifdef OPENSSL_NO_SOCK
1295     BIO_printf(bio_err,
1296                "Error setting up accept BIO - sockets not supported.\n");
1297     return NULL;
1298 # else
1299     BIO *acbio = NULL, *bufbio = NULL;
1300
1301     bufbio = BIO_new(BIO_f_buffer());
1302     if (bufbio == NULL)
1303         goto err;
1304     acbio = BIO_new(BIO_s_accept());
1305     if (acbio == NULL
1306         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1307         || BIO_set_accept_port(acbio, port) < 0) {
1308         log_message(LOG_ERR, "Error setting up accept BIO");
1309         goto err;
1310     }
1311
1312     BIO_set_accept_bios(acbio, bufbio);
1313     bufbio = NULL;
1314     if (BIO_do_accept(acbio) <= 0) {
1315         log_message(LOG_ERR, "Error starting accept");
1316         goto err;
1317     }
1318
1319     return acbio;
1320
1321  err:
1322     BIO_free_all(acbio);
1323     BIO_free(bufbio);
1324     return NULL;
1325 # endif
1326 }
1327
1328 # ifndef OPENSSL_NO_SOCK
1329 /*
1330  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1331  */
1332 static int urldecode(char *p)
1333 {
1334     unsigned char *out = (unsigned char *)p;
1335     unsigned char *save = out;
1336
1337     for (; *p; p++) {
1338         if (*p != '%')
1339             *out++ = *p;
1340         else if (isxdigit(_UC(p[1])) && isxdigit(_UC(p[2]))) {
1341             /* Don't check, can't fail because of ixdigit() call. */
1342             *out++ = (OPENSSL_hexchar2int(p[1]) << 4)
1343                    | OPENSSL_hexchar2int(p[2]);
1344             p += 2;
1345         }
1346         else
1347             return -1;
1348     }
1349     *out = '\0';
1350     return (int)(out - save);
1351 }
1352 # endif
1353
1354 # ifdef OCSP_DAEMON
1355 static void sock_timeout(int signum)
1356 {
1357     if (acfd != (int)INVALID_SOCKET)
1358         (void)shutdown(acfd, SHUT_RD);
1359 }
1360 # endif
1361
1362 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1363                         int timeout)
1364 {
1365 # ifdef OPENSSL_NO_SOCK
1366     return 0;
1367 # else
1368     int len;
1369     OCSP_REQUEST *req = NULL;
1370     char inbuf[2048], reqbuf[2048];
1371     char *p, *q;
1372     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1373     const char *client;
1374
1375     *preq = NULL;
1376
1377     /* Connection loss before accept() is routine, ignore silently */
1378     if (BIO_do_accept(acbio) <= 0)
1379         return 0;
1380
1381     cbio = BIO_pop(acbio);
1382     *pcbio = cbio;
1383     client = BIO_get_peer_name(cbio);
1384
1385 #  ifdef OCSP_DAEMON
1386     if (timeout > 0) {
1387         (void) BIO_get_fd(cbio, &acfd);
1388         alarm(timeout);
1389     }
1390 #  endif
1391
1392     /* Read the request line. */
1393     len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
1394     if (len <= 0)
1395         goto out;
1396
1397     if (strncmp(reqbuf, "GET ", 4) == 0) {
1398         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1399         for (p = reqbuf + 4; *p == ' '; ++p)
1400             continue;
1401         if (*p != '/') {
1402             log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
1403             goto out;
1404         }
1405         p++;
1406
1407         /* Splice off the HTTP version identifier. */
1408         for (q = p; *q; q++)
1409             if (*q == ' ')
1410                 break;
1411         if (strncmp(q, " HTTP/1.", 8) != 0) {
1412             log_message(LOG_INFO,
1413                         "Invalid request -- bad HTTP version: %s", client);
1414             goto out;
1415         }
1416         *q = '\0';
1417
1418         /*
1419          * Skip "GET / HTTP..." requests often used by load-balancers
1420          */
1421         if (p[1] == '\0')
1422             goto out;
1423
1424         len = urldecode(p);
1425         if (len <= 0) {
1426             log_message(LOG_INFO,
1427                         "Invalid request -- bad URL encoding: %s", client);
1428             goto out;
1429         }
1430         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1431             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1432             log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
1433             goto out;
1434         }
1435         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1436         getbio = BIO_push(b64, getbio);
1437     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1438         log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
1439         goto out;
1440     }
1441
1442     /* Read and skip past the headers. */
1443     for (;;) {
1444         len = BIO_gets(cbio, inbuf, sizeof(inbuf));
1445         if (len <= 0)
1446             goto out;
1447         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1448             break;
1449     }
1450
1451 #  ifdef OCSP_DAEMON
1452     /* Clear alarm before we close the client socket */
1453     alarm(0);
1454     timeout = 0;
1455 #  endif
1456
1457     /* Try to read OCSP request */
1458     if (getbio != NULL) {
1459         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1460         BIO_free_all(getbio);
1461     } else {
1462         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1463     }
1464
1465     if (req == NULL)
1466         log_message(LOG_ERR, "Error parsing OCSP request");
1467
1468     *preq = req;
1469
1470 out:
1471 #  ifdef OCSP_DAEMON
1472     if (timeout > 0)
1473         alarm(0);
1474     acfd = (int)INVALID_SOCKET;
1475 #  endif
1476     return 1;
1477 # endif
1478 }
1479
1480 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1481 {
1482     char http_resp[] =
1483         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1484         "Content-Length: %d\r\n\r\n";
1485     if (cbio == NULL)
1486         return 0;
1487     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1488     i2d_OCSP_RESPONSE_bio(cbio, resp);
1489     (void)BIO_flush(cbio);
1490     return 1;
1491 }
1492
1493 # ifndef OPENSSL_NO_SOCK
1494 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
1495                                       const char *path,
1496                                       const STACK_OF(CONF_VALUE) *headers,
1497                                       OCSP_REQUEST *req, int req_timeout)
1498 {
1499     int fd;
1500     int rv;
1501     int i;
1502     int add_host = 1;
1503     OCSP_REQ_CTX *ctx = NULL;
1504     OCSP_RESPONSE *rsp = NULL;
1505     fd_set confds;
1506     struct timeval tv;
1507
1508     if (req_timeout != -1)
1509         BIO_set_nbio(cbio, 1);
1510
1511     rv = BIO_do_connect(cbio);
1512
1513     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1514         BIO_puts(bio_err, "Error connecting BIO\n");
1515         return NULL;
1516     }
1517
1518     if (BIO_get_fd(cbio, &fd) < 0) {
1519         BIO_puts(bio_err, "Can't get connection fd\n");
1520         goto err;
1521     }
1522
1523     if (req_timeout != -1 && rv <= 0) {
1524         FD_ZERO(&confds);
1525         openssl_fdset(fd, &confds);
1526         tv.tv_usec = 0;
1527         tv.tv_sec = req_timeout;
1528         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1529         if (rv == 0) {
1530             BIO_puts(bio_err, "Timeout on connect\n");
1531             return NULL;
1532         }
1533     }
1534
1535     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1536     if (ctx == NULL)
1537         return NULL;
1538
1539     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1540         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1541         if (add_host == 1 && strcasecmp("host", hdr->name) == 0)
1542             add_host = 0;
1543         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1544             goto err;
1545     }
1546
1547     if (add_host == 1 && OCSP_REQ_CTX_add1_header(ctx, "Host", host) == 0)
1548         goto err;
1549
1550     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1551         goto err;
1552
1553     for (;;) {
1554         rv = OCSP_sendreq_nbio(&rsp, ctx);
1555         if (rv != -1)
1556             break;
1557         if (req_timeout == -1)
1558             continue;
1559         FD_ZERO(&confds);
1560         openssl_fdset(fd, &confds);
1561         tv.tv_usec = 0;
1562         tv.tv_sec = req_timeout;
1563         if (BIO_should_read(cbio)) {
1564             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1565         } else if (BIO_should_write(cbio)) {
1566             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1567         } else {
1568             BIO_puts(bio_err, "Unexpected retry condition\n");
1569             goto err;
1570         }
1571         if (rv == 0) {
1572             BIO_puts(bio_err, "Timeout on request\n");
1573             break;
1574         }
1575         if (rv == -1) {
1576             BIO_puts(bio_err, "Select error\n");
1577             break;
1578         }
1579
1580     }
1581  err:
1582     OCSP_REQ_CTX_free(ctx);
1583
1584     return rsp;
1585 }
1586
1587 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1588                                  const char *host, const char *path,
1589                                  const char *port, int use_ssl,
1590                                  STACK_OF(CONF_VALUE) *headers,
1591                                  int req_timeout)
1592 {
1593     BIO *cbio = NULL;
1594     SSL_CTX *ctx = NULL;
1595     OCSP_RESPONSE *resp = NULL;
1596
1597     cbio = BIO_new_connect(host);
1598     if (cbio == NULL) {
1599         BIO_printf(bio_err, "Error creating connect BIO\n");
1600         goto end;
1601     }
1602     if (port != NULL)
1603         BIO_set_conn_port(cbio, port);
1604     if (use_ssl == 1) {
1605         BIO *sbio;
1606         ctx = SSL_CTX_new(TLS_client_method());
1607         if (ctx == NULL) {
1608             BIO_printf(bio_err, "Error creating SSL context.\n");
1609             goto end;
1610         }
1611         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1612         sbio = BIO_new_ssl(ctx, 1);
1613         cbio = BIO_push(sbio, cbio);
1614     }
1615
1616     resp = query_responder(cbio, host, path, headers, req, req_timeout);
1617     if (resp == NULL)
1618         BIO_printf(bio_err, "Error querying OCSP responder\n");
1619  end:
1620     BIO_free_all(cbio);
1621     SSL_CTX_free(ctx);
1622     return resp;
1623 }
1624 # endif
1625
1626 #endif