apps/ocsp.c

   1 /*
   2  * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 # if defined(OPENSSL_SYS_UNIX) && !defined(OPENSSL_NO_SOCK) \
  40      && !defined(OPENSSL_NO_POSIX_IO)
  41 #  define OCSP_DAEMON
  42 #  include <sys/types.h>
  43 #  include <sys/wait.h>
  44 #  include <syslog.h>
  45 #  include <signal.h>
  46 #  define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
  47 # else
  48 #  undef LOG_INFO
  49 #  undef LOG_WARNING
  50 #  undef LOG_ERR
  51 #  define LOG_INFO      0
  52 #  define LOG_WARNING   1
  53 #  define LOG_ERR       2
  54 # endif
  55
  56 # if defined(OPENSSL_SYS_VXWORKS)
  57 /* not supported */
  58 int setpgid(pid_t pid, pid_t pgid)
  59 {
  60     errno = ENOSYS;
  61     return 0;
  62 }
  63 /* not supported */
  64 pid_t fork(void)
  65 {
  66     errno = ENOSYS;
  67     return (pid_t) -1;
  68 }
  69 # endif
  70 /* Maximum leeway in validity period: default 5 minutes */
  71 # define MAX_VALIDITY_PERIOD    (5 * 60)
  72
  73 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
  74                          const EVP_MD *cert_id_md, X509 *issuer,
  75                          STACK_OF(OCSP_CERTID) *ids);
  76 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
  77                            const EVP_MD *cert_id_md, X509 *issuer,
  78                            STACK_OF(OCSP_CERTID) *ids);
  79 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
  80                               STACK_OF(OPENSSL_STRING) *names,
  81                               STACK_OF(OCSP_CERTID) *ids, long nsec,
  82                               long maxage);
  83 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
  84                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
  85                               EVP_PKEY *rkey, const EVP_MD *md,
  86                               STACK_OF(OPENSSL_STRING) *sigopts,
  87                               STACK_OF(X509) *rother, unsigned long flags,
  88                               int nmin, int ndays, int badsig);
  89
  90 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
  91 static BIO *init_responder(const char *port);
  92 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, int timeout);
  93 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
  94 static void log_message(int level, const char *fmt, ...);
  95 static char *prog;
  96 static int multi = 0;
  97
  98 # ifdef OCSP_DAEMON
  99 static int acfd = (int) INVALID_SOCKET;
 100 static int index_changed(CA_DB *);
 101 static void spawn_loop(void);
 102 static int print_syslog(const char *str, size_t len, void *levPtr);
 103 static void sock_timeout(int signum);
 104 # endif
 105
 106 # ifndef OPENSSL_NO_SOCK
 107 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
 108                                       const char *path,
 109                                       const STACK_OF(CONF_VALUE) *headers,
 110                                       OCSP_REQUEST *req, int req_timeout);
 111 # endif
 112
 113 typedef enum OPTION_choice {
 114     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 115     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 116     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 117     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 118     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 119     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 120     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 121     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 122     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH,
 123     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 124     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 125     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 126     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
 127     OPT_V_ENUM,
 128     OPT_MD,
 129     OPT_MULTI
 130 } OPTION_CHOICE;
 131
 132 const OPTIONS ocsp_options[] = {
 133     {"help", OPT_HELP, '-', "Display this summary"},
 134     {"out", OPT_OUTFILE, '>', "Output filename"},
 135     {"timeout", OPT_TIMEOUT, 'p',
 136      "Connection timeout (in seconds) to the OCSP responder"},
 137     {"url", OPT_URL, 's', "Responder URL"},
 138     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
 139     {"port", OPT_PORT, 'p', "Port to run responder on"},
 140     {"ignore_err", OPT_IGNORE_ERR, '-',
 141      "Ignore error on OCSP request or response and continue running"},
 142     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 143     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 144     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 145     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 146      "Don't include any certificates in response"},
 147     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 148      "Identify response by signing certificate key ID"},
 149 # ifdef OCSP_DAEMON
 150     {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
 151 # endif
 152     {"no_certs", OPT_NO_CERTS, '-',
 153      "Don't include any certificates in signed request"},
 154     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 155      "Don't check signature on response"},
 156     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 157      "Don't check signing certificate"},
 158     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 159     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 160      "Don't do additional checks on signing certificate"},
 161     {"no_explicit", OPT_NO_EXPLICIT, '-',
 162      "Do not explicitly check the chain, just verify the root"},
 163     {"trust_other", OPT_TRUST_OTHER, '-',
 164      "Don't verify additional certificates"},
 165     {"no_intern", OPT_NO_INTERN, '-',
 166      "Don't search certificates contained in response for signer"},
 167     {"badsig", OPT_BADSIG, '-',
 168         "Corrupt last byte of loaded OSCP response signature (for test)"},
 169     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 170     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 171     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 172     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 173     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 174     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 175     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 176     {"sign_other", OPT_SIGN_OTHER, '<',
 177      "Additional certificates to include in signed request"},
 178     {"verify_other", OPT_VERIFY_OTHER, '<',
 179      "Additional certificates to search for signer"},
 180     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 181     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 182     {"no-CAfile", OPT_NOCAFILE, '-',
 183      "Do not load the default certificates file"},
 184     {"no-CApath", OPT_NOCAPATH, '-',
 185      "Do not load certificates from the default certificates directory"},
 186     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 187      "Maximum validity discrepancy in seconds"},
 188     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 189     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 190     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 191     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 192     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 193     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 194     {"cert", OPT_CERT, '<', "Certificate to check"},
 195     {"serial", OPT_SERIAL, 's', "Serial number to check"},
 196     {"index", OPT_INDEX, '<', "Certificate status index file"},
 197     {"CA", OPT_CA, '<', "CA certificate"},
 198     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 199     {"nrequest", OPT_REQUEST, 'p',
 200      "Number of requests to accept (default unlimited)"},
 201     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 202     {"rsigner", OPT_RSIGNER, '<',
 203      "Responder certificate to sign responses with"},
 204     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 205     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 206     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
 207     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
 208     {"header", OPT_HEADER, 's', "key=value header to add"},
 209     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
 210     OPT_V_OPTIONS,
 211     {NULL}
 212 };
 213
 214 int ocsp_main(int argc, char **argv)
 215 {
 216     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 217     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 218     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
 219     int trailing_md = 0;
 220     CA_DB *rdb = NULL;
 221     EVP_PKEY *key = NULL, *rkey = NULL;
 222     OCSP_BASICRESP *bs = NULL;
 223     OCSP_REQUEST *req = NULL;
 224     OCSP_RESPONSE *resp = NULL;
 225     STACK_OF(CONF_VALUE) *headers = NULL;
 226     STACK_OF(OCSP_CERTID) *ids = NULL;
 227     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 228     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 229     STACK_OF(X509) *issuers = NULL;
 230     X509 *issuer = NULL, *cert = NULL;
 231     STACK_OF(X509) *rca_cert = NULL;
 232     X509 *signer = NULL, *rsigner = NULL;
 233     X509_STORE *store = NULL;
 234     X509_VERIFY_PARAM *vpm = NULL;
 235     const char *CAfile = NULL, *CApath = NULL;
 236     char *header, *value;
 237     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 238     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 239     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 240     char *rsignfile = NULL, *rkeyfile = NULL;
 241     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 242     char *signfile = NULL, *keyfile = NULL;
 243     char *thost = NULL, *tport = NULL, *tpath = NULL;
 244     int noCAfile = 0, noCApath = 0;
 245     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 246     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 247     int req_text = 0, resp_text = 0, ret = 1;
 248     int req_timeout = -1;
 249     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 250     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 251     OPTION_CHOICE o;
 252
 253     reqnames = sk_OPENSSL_STRING_new_null();
 254     if (reqnames == NULL)
 255         goto end;
 256     ids = sk_OCSP_CERTID_new_null();
 257     if (ids == NULL)
 258         goto end;
 259     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 260         return 1;
 261
 262     prog = opt_init(argc, argv, ocsp_options);
 263     while ((o = opt_next()) != OPT_EOF) {
 264         switch (o) {
 265         case OPT_EOF:
 266         case OPT_ERR:
 267  opthelp:
 268             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 269             goto end;
 270         case OPT_HELP:
 271             ret = 0;
 272             opt_help(ocsp_options);
 273             goto end;
 274         case OPT_OUTFILE:
 275             outfile = opt_arg();
 276             break;
 277         case OPT_TIMEOUT:
 278 #ifndef OPENSSL_NO_SOCK
 279             req_timeout = atoi(opt_arg());
 280 #endif
 281             break;
 282         case OPT_URL:
 283             OPENSSL_free(thost);
 284             OPENSSL_free(tport);
 285             OPENSSL_free(tpath);
 286             thost = tport = tpath = NULL;
 287             if (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
 288                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 289                 goto end;
 290             }
 291             thost = host;
 292             tport = port;
 293             tpath = path;
 294             break;
 295         case OPT_HOST:
 296             host = opt_arg();
 297             break;
 298         case OPT_PORT:
 299             port = opt_arg();
 300             break;
 301         case OPT_IGNORE_ERR:
 302             ignore_err = 1;
 303             break;
 304         case OPT_NOVERIFY:
 305             noverify = 1;
 306             break;
 307         case OPT_NONCE:
 308             add_nonce = 2;
 309             break;
 310         case OPT_NO_NONCE:
 311             add_nonce = 0;
 312             break;
 313         case OPT_RESP_NO_CERTS:
 314             rflags |= OCSP_NOCERTS;
 315             break;
 316         case OPT_RESP_KEY_ID:
 317             rflags |= OCSP_RESPID_KEY;
 318             break;
 319         case OPT_NO_CERTS:
 320             sign_flags |= OCSP_NOCERTS;
 321             break;
 322         case OPT_NO_SIGNATURE_VERIFY:
 323             verify_flags |= OCSP_NOSIGS;
 324             break;
 325         case OPT_NO_CERT_VERIFY:
 326             verify_flags |= OCSP_NOVERIFY;
 327             break;
 328         case OPT_NO_CHAIN:
 329             verify_flags |= OCSP_NOCHAIN;
 330             break;
 331         case OPT_NO_CERT_CHECKS:
 332             verify_flags |= OCSP_NOCHECKS;
 333             break;
 334         case OPT_NO_EXPLICIT:
 335             verify_flags |= OCSP_NOEXPLICIT;
 336             break;
 337         case OPT_TRUST_OTHER:
 338             verify_flags |= OCSP_TRUSTOTHER;
 339             break;
 340         case OPT_NO_INTERN:
 341             verify_flags |= OCSP_NOINTERN;
 342             break;
 343         case OPT_BADSIG:
 344             badsig = 1;
 345             break;
 346         case OPT_TEXT:
 347             req_text = resp_text = 1;
 348             break;
 349         case OPT_REQ_TEXT:
 350             req_text = 1;
 351             break;
 352         case OPT_RESP_TEXT:
 353             resp_text = 1;
 354             break;
 355         case OPT_REQIN:
 356             reqin = opt_arg();
 357             break;
 358         case OPT_RESPIN:
 359             respin = opt_arg();
 360             break;
 361         case OPT_SIGNER:
 362             signfile = opt_arg();
 363             break;
 364         case OPT_VAFILE:
 365             verify_certfile = opt_arg();
 366             verify_flags |= OCSP_TRUSTOTHER;
 367             break;
 368         case OPT_SIGN_OTHER:
 369             sign_certfile = opt_arg();
 370             break;
 371         case OPT_VERIFY_OTHER:
 372             verify_certfile = opt_arg();
 373             break;
 374         case OPT_CAFILE:
 375             CAfile = opt_arg();
 376             break;
 377         case OPT_CAPATH:
 378             CApath = opt_arg();
 379             break;
 380         case OPT_NOCAFILE:
 381             noCAfile = 1;
 382             break;
 383         case OPT_NOCAPATH:
 384             noCApath = 1;
 385             break;
 386         case OPT_V_CASES:
 387             if (!opt_verify(o, vpm))
 388                 goto end;
 389             vpmtouched++;
 390             break;
 391         case OPT_VALIDITY_PERIOD:
 392             opt_long(opt_arg(), &nsec);
 393             break;
 394         case OPT_STATUS_AGE:
 395             opt_long(opt_arg(), &maxage);
 396             break;
 397         case OPT_SIGNKEY:
 398             keyfile = opt_arg();
 399             break;
 400         case OPT_REQOUT:
 401             reqout = opt_arg();
 402             break;
 403         case OPT_RESPOUT:
 404             respout = opt_arg();
 405             break;
 406         case OPT_PATH:
 407             path = opt_arg();
 408             break;
 409         case OPT_ISSUER:
 410             issuer = load_cert(opt_arg(), FORMAT_PEM, "issuer certificate");
 411             if (issuer == NULL)
 412                 goto end;
 413             if (issuers == NULL) {
 414                 if ((issuers = sk_X509_new_null()) == NULL)
 415                     goto end;
 416             }
 417             sk_X509_push(issuers, issuer);
 418             break;
 419         case OPT_CERT:
 420             X509_free(cert);
 421             cert = load_cert(opt_arg(), FORMAT_PEM, "certificate");
 422             if (cert == NULL)
 423                 goto end;
 424             if (cert_id_md == NULL)
 425                 cert_id_md = EVP_sha1();
 426             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 427                 goto end;
 428             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 429                 goto end;
 430             trailing_md = 0;
 431             break;
 432         case OPT_SERIAL:
 433             if (cert_id_md == NULL)
 434                 cert_id_md = EVP_sha1();
 435             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 436                 goto end;
 437             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 438                 goto end;
 439             trailing_md = 0;
 440             break;
 441         case OPT_INDEX:
 442             ridx_filename = opt_arg();
 443             break;
 444         case OPT_CA:
 445             rca_filename = opt_arg();
 446             break;
 447         case OPT_NMIN:
 448             opt_int(opt_arg(), &nmin);
 449             if (ndays == -1)
 450                 ndays = 0;
 451             break;
 452         case OPT_REQUEST:
 453             opt_int(opt_arg(), &accept_count);
 454             break;
 455         case OPT_NDAYS:
 456             ndays = atoi(opt_arg());
 457             break;
 458         case OPT_RSIGNER:
 459             rsignfile = opt_arg();
 460             break;
 461         case OPT_RKEY:
 462             rkeyfile = opt_arg();
 463             break;
 464         case OPT_ROTHER:
 465             rcertfile = opt_arg();
 466             break;
 467         case OPT_RMD:   /* Response MessageDigest */
 468             if (!opt_md(opt_arg(), &rsign_md))
 469                 goto end;
 470             break;
 471         case OPT_RSIGOPT:
 472             if (rsign_sigopts == NULL)
 473                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
 474             if (rsign_sigopts == NULL || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
 475                 goto end;
 476             break;
 477         case OPT_HEADER:
 478             header = opt_arg();
 479             value = strchr(header, '=');
 480             if (value == NULL) {
 481                 BIO_printf(bio_err, "Missing = in header key=value\n");
 482                 goto opthelp;
 483             }
 484             *value++ = '\0';
 485             if (!X509V3_add_value(header, value, &headers))
 486                 goto end;
 487             break;
 488         case OPT_MD:
 489             if (trailing_md) {
 490                 BIO_printf(bio_err,
 491                            "%s: Digest must be before -cert or -serial\n",
 492                            prog);
 493                 goto opthelp;
 494             }
 495             if (!opt_md(opt_unknown(), &cert_id_md))
 496                 goto opthelp;
 497             trailing_md = 1;
 498             break;
 499         case OPT_MULTI:
 500 # ifdef OCSP_DAEMON
 501             multi = atoi(opt_arg());
 502 # endif
 503             break;
 504         }
 505     }
 506     if (trailing_md) {
 507         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
 508                    prog);
 509         goto opthelp;
 510     }
 511     argc = opt_num_rest();
 512     if (argc != 0)
 513         goto opthelp;
 514
 515     /* Have we anything to do? */
 516     if (req == NULL && reqin == NULL
 517         && respin == NULL && !(port != NULL && ridx_filename != NULL))
 518         goto opthelp;
 519
 520     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 521     if (out == NULL)
 522         goto end;
 523
 524     if (req == NULL && (add_nonce != 2))
 525         add_nonce = 0;
 526
 527     if (req == NULL && reqin != NULL) {
 528         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 529         if (derbio == NULL)
 530             goto end;
 531         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 532         BIO_free(derbio);
 533         if (req == NULL) {
 534             BIO_printf(bio_err, "Error reading OCSP request\n");
 535             goto end;
 536         }
 537     }
 538
 539     if (req == NULL && port != NULL) {
 540         acbio = init_responder(port);
 541         if (acbio == NULL)
 542             goto end;
 543     }
 544
 545     if (rsignfile != NULL) {
 546         if (rkeyfile == NULL)
 547             rkeyfile = rsignfile;
 548         rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
 549         if (rsigner == NULL) {
 550             BIO_printf(bio_err, "Error loading responder certificate\n");
 551             goto end;
 552         }
 553         if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
 554                         NULL, "CA certificate"))
 555             goto end;
 556         if (rcertfile != NULL) {
 557             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
 558                             "responder other certificates"))
 559                 goto end;
 560         }
 561         rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 562                         "responder private key");
 563         if (rkey == NULL)
 564             goto end;
 565     }
 566
 567     if (ridx_filename != NULL
 568         && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
 569         BIO_printf(bio_err,
 570                    "Responder mode requires certificate, key, and CA.\n");
 571         goto end;
 572     }
 573
 574     if (ridx_filename != NULL) {
 575         rdb = load_index(ridx_filename, NULL);
 576         if (rdb == NULL || index_index(rdb) <= 0) {
 577             ret = 1;
 578             goto end;
 579         }
 580     }
 581
 582 # ifdef OCSP_DAEMON
 583     if (multi && acbio != NULL)
 584         spawn_loop();
 585     if (acbio != NULL && req_timeout > 0)
 586         signal(SIGALRM, sock_timeout);
 587 #endif
 588
 589     if (acbio != NULL)
 590         log_message(LOG_INFO, "waiting for OCSP client connections...");
 591
 592 redo_accept:
 593
 594     if (acbio != NULL) {
 595 # ifdef OCSP_DAEMON
 596         if (index_changed(rdb)) {
 597             CA_DB *newrdb = load_index(ridx_filename, NULL);
 598
 599             if (newrdb != NULL && index_index(newrdb) > 0) {
 600                 free_index(rdb);
 601                 rdb = newrdb;
 602             } else {
 603                 free_index(newrdb);
 604                 log_message(LOG_ERR, "error reloading updated index: %s",
 605                             ridx_filename);
 606             }
 607         }
 608 # endif
 609
 610         req = NULL;
 611         if (!do_responder(&req, &cbio, acbio, req_timeout))
 612             goto redo_accept;
 613
 614         if (req == NULL) {
 615             resp =
 616                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 617                                      NULL);
 618             send_ocsp_response(cbio, resp);
 619             goto done_resp;
 620         }
 621     }
 622
 623     if (req == NULL
 624         && (signfile != NULL || reqout != NULL
 625             || host != NULL || add_nonce || ridx_filename != NULL)) {
 626         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 627         goto end;
 628     }
 629
 630     if (req != NULL && add_nonce)
 631         OCSP_request_add1_nonce(req, NULL, -1);
 632
 633     if (signfile != NULL) {
 634         if (keyfile == NULL)
 635             keyfile = signfile;
 636         signer = load_cert(signfile, FORMAT_PEM, "signer certificate");
 637         if (signer == NULL) {
 638             BIO_printf(bio_err, "Error loading signer certificate\n");
 639             goto end;
 640         }
 641         if (sign_certfile != NULL) {
 642             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL,
 643                             "signer certificates"))
 644                 goto end;
 645         }
 646         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 647                        "signer private key");
 648         if (key == NULL)
 649             goto end;
 650
 651         if (!OCSP_request_sign
 652             (req, signer, key, NULL, sign_other, sign_flags)) {
 653             BIO_printf(bio_err, "Error signing OCSP request\n");
 654             goto end;
 655         }
 656     }
 657
 658     if (req_text && req != NULL)
 659         OCSP_REQUEST_print(out, req, 0);
 660
 661     if (reqout != NULL) {
 662         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 663         if (derbio == NULL)
 664             goto end;
 665         i2d_OCSP_REQUEST_bio(derbio, req);
 666         BIO_free(derbio);
 667     }
 668
 669     if (rdb != NULL) {
 670         make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
 671                                rsign_md, rsign_sigopts, rother, rflags, nmin, ndays, badsig);
 672         if (cbio != NULL)
 673             send_ocsp_response(cbio, resp);
 674     } else if (host != NULL) {
 675 # ifndef OPENSSL_NO_SOCK
 676         resp = process_responder(req, host, path,
 677                                  port, use_ssl, headers, req_timeout);
 678         if (resp == NULL)
 679             goto end;
 680 # else
 681         BIO_printf(bio_err,
 682                    "Error creating connect BIO - sockets not supported.\n");
 683         goto end;
 684 # endif
 685     } else if (respin != NULL) {
 686         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 687         if (derbio == NULL)
 688             goto end;
 689         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 690         BIO_free(derbio);
 691         if (resp == NULL) {
 692             BIO_printf(bio_err, "Error reading OCSP response\n");
 693             goto end;
 694         }
 695     } else {
 696         ret = 0;
 697         goto end;
 698     }
 699
 700  done_resp:
 701
 702     if (respout != NULL) {
 703         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 704         if (derbio == NULL)
 705             goto end;
 706         i2d_OCSP_RESPONSE_bio(derbio, resp);
 707         BIO_free(derbio);
 708     }
 709
 710     i = OCSP_response_status(resp);
 711     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 712         BIO_printf(out, "Responder Error: %s (%d)\n",
 713                    OCSP_response_status_str(i), i);
 714         if (!ignore_err)
 715                 goto end;
 716     }
 717
 718     if (resp_text)
 719         OCSP_RESPONSE_print(out, resp, 0);
 720
 721     /* If running as responder don't verify our own response */
 722     if (cbio != NULL) {
 723         /* If not unlimited, see if we took all we should. */
 724         if (accept_count != -1 && --accept_count <= 0) {
 725             ret = 0;
 726             goto end;
 727         }
 728         BIO_free_all(cbio);
 729         cbio = NULL;
 730         OCSP_REQUEST_free(req);
 731         req = NULL;
 732         OCSP_RESPONSE_free(resp);
 733         resp = NULL;
 734         goto redo_accept;
 735     }
 736     if (ridx_filename != NULL) {
 737         ret = 0;
 738         goto end;
 739     }
 740
 741     if (store == NULL) {
 742         store = setup_verify(CAfile, CApath, noCAfile, noCApath);
 743         if (!store)
 744             goto end;
 745     }
 746     if (vpmtouched)
 747         X509_STORE_set1_param(store, vpm);
 748     if (verify_certfile != NULL) {
 749         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
 750                         "validator certificate"))
 751             goto end;
 752     }
 753
 754     bs = OCSP_response_get1_basic(resp);
 755     if (bs == NULL) {
 756         BIO_printf(bio_err, "Error parsing response\n");
 757         goto end;
 758     }
 759
 760     ret = 0;
 761
 762     if (!noverify) {
 763         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 764             if (i == -1)
 765                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 766             else {
 767                 BIO_printf(bio_err, "Nonce Verify error\n");
 768                 ret = 1;
 769                 goto end;
 770             }
 771         }
 772
 773         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 774         if (i <= 0 && issuers) {
 775             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 776             if (i > 0)
 777                 ERR_clear_error();
 778         }
 779         if (i <= 0) {
 780             BIO_printf(bio_err, "Response Verify Failure\n");
 781             ERR_print_errors(bio_err);
 782             ret = 1;
 783         } else {
 784             BIO_printf(bio_err, "Response verify OK\n");
 785         }
 786     }
 787
 788     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 789
 790  end:
 791     ERR_print_errors(bio_err);
 792     X509_free(signer);
 793     X509_STORE_free(store);
 794     X509_VERIFY_PARAM_free(vpm);
 795     sk_OPENSSL_STRING_free(rsign_sigopts);
 796     EVP_PKEY_free(key);
 797     EVP_PKEY_free(rkey);
 798     X509_free(cert);
 799     sk_X509_pop_free(issuers, X509_free);
 800     X509_free(rsigner);
 801     sk_X509_pop_free(rca_cert, X509_free);
 802     free_index(rdb);
 803     BIO_free_all(cbio);
 804     BIO_free_all(acbio);
 805     BIO_free_all(out);
 806     OCSP_REQUEST_free(req);
 807     OCSP_RESPONSE_free(resp);
 808     OCSP_BASICRESP_free(bs);
 809     sk_OPENSSL_STRING_free(reqnames);
 810     sk_OCSP_CERTID_free(ids);
 811     sk_X509_pop_free(sign_other, X509_free);
 812     sk_X509_pop_free(verify_other, X509_free);
 813     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 814     OPENSSL_free(thost);
 815     OPENSSL_free(tport);
 816     OPENSSL_free(tpath);
 817
 818     return ret;
 819 }
 820
 821 static void
 822 log_message(int level, const char *fmt, ...)
 823 {
 824     va_list ap;
 825
 826     va_start(ap, fmt);
 827 # ifdef OCSP_DAEMON
 828     if (multi) {
 829         char buf[1024];
 830         if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
 831             syslog(level, "%s", buf);
 832         }
 833         if (level >= LOG_ERR)
 834             ERR_print_errors_cb(print_syslog, &level);
 835     }
 836 # endif
 837     if (!multi) {
 838         BIO_printf(bio_err, "%s: ", prog);
 839         BIO_vprintf(bio_err, fmt, ap);
 840         BIO_printf(bio_err, "\n");
 841     }
 842     va_end(ap);
 843 }
 844
 845 # ifdef OCSP_DAEMON
 846
 847 static int print_syslog(const char *str, size_t len, void *levPtr)
 848 {
 849     int level = *(int *)levPtr;
 850     int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
 851
 852     syslog(level, "%.*s", ilen, str);
 853
 854     return ilen;
 855 }
 856
 857 static int index_changed(CA_DB *rdb)
 858 {
 859     struct stat sb;
 860
 861     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
 862         if (rdb->dbst.st_mtime != sb.st_mtime
 863             || rdb->dbst.st_ctime != sb.st_ctime
 864             || rdb->dbst.st_ino != sb.st_ino
 865             || rdb->dbst.st_dev != sb.st_dev) {
 866             syslog(LOG_INFO, "index file changed, reloading");
 867             return 1;
 868         }
 869     }
 870     return 0;
 871 }
 872
 873 static void killall(int ret, pid_t *kidpids)
 874 {
 875     int i;
 876
 877     for (i = 0; i < multi; ++i)
 878         if (kidpids[i] != 0)
 879             (void)kill(kidpids[i], SIGTERM);
 880     OPENSSL_free(kidpids);
 881     sleep(1);
 882     exit(ret);
 883 }
 884
 885 static int termsig = 0;
 886
 887 static void noteterm (int sig)
 888 {
 889     termsig = sig;
 890 }
 891
 892 /*
 893  * Loop spawning up to `multi` child processes, only child processes return
 894  * from this function.  The parent process loops until receiving a termination
 895  * signal, kills extant children and exits without returning.
 896  */
 897 static void spawn_loop(void)
 898 {
 899     pid_t *kidpids = NULL;
 900     int status;
 901     int procs = 0;
 902     int i;
 903
 904     openlog(prog, LOG_PID, LOG_DAEMON);
 905
 906     if (setpgid(0, 0)) {
 907         syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
 908                strerror(errno));
 909         exit(1);
 910     }
 911     kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
 912     for (i = 0; i < multi; ++i)
 913         kidpids[i] = 0;
 914
 915     signal(SIGINT, noteterm);
 916     signal(SIGTERM, noteterm);
 917
 918     while (termsig == 0) {
 919         pid_t fpid;
 920
 921         /*
 922          * Wait for a child to replace when we're at the limit.
 923          * Slow down if a child exited abnormally or waitpid() < 0
 924          */
 925         while (termsig == 0 && procs >= multi) {
 926             if ((fpid = waitpid(-1, &status, 0)) > 0) {
 927                 for (i = 0; i < procs; ++i) {
 928                     if (kidpids[i] == fpid) {
 929                         kidpids[i] = 0;
 930                         --procs;
 931                         break;
 932                     }
 933                 }
 934                 if (i >= multi) {
 935                     syslog(LOG_ERR, "fatal: internal error: "
 936                            "no matching child slot for pid: %ld",
 937                            (long) fpid);
 938                     killall(1, kidpids);
 939                 }
 940                 if (status != 0) {
 941                     if (WIFEXITED(status))
 942                         syslog(LOG_WARNING, "child process: %ld, exit status: %d",
 943                                (long)fpid, WEXITSTATUS(status));
 944                     else if (WIFSIGNALED(status))
 945                         syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
 946                                (long)fpid, WTERMSIG(status),
 947 #ifdef WCOREDUMP
 948                                WCOREDUMP(status) ? " (core dumped)" :
 949 #endif
 950                                "");
 951                     sleep(1);
 952                 }
 953                 break;
 954             } else if (errno != EINTR) {
 955                 syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
 956                 killall(1, kidpids);
 957             }
 958         }
 959         if (termsig)
 960             break;
 961
 962         switch(fpid = fork()) {
 963         case -1:            /* error */
 964             /* System critically low on memory, pause and try again later */
 965             sleep(30);
 966             break;
 967         case 0:             /* child */
 968             OPENSSL_free(kidpids);
 969             signal(SIGINT, SIG_DFL);
 970             signal(SIGTERM, SIG_DFL);
 971             if (termsig)
 972                 _exit(0);
 973             if (RAND_poll() <= 0) {
 974                 syslog(LOG_ERR, "fatal: RAND_poll() failed");
 975                 _exit(1);
 976             }
 977             return;
 978         default:            /* parent */
 979             for (i = 0; i < multi; ++i) {
 980                 if (kidpids[i] == 0) {
 981                     kidpids[i] = fpid;
 982                     procs++;
 983                     break;
 984                 }
 985             }
 986             if (i >= multi) {
 987                 syslog(LOG_ERR, "fatal: internal error: no free child slots");
 988                 killall(1, kidpids);
 989             }
 990             break;
 991         }
 992     }
 993
 994     /* The loop above can only break on termsig */
 995     syslog(LOG_INFO, "terminating on signal: %d", termsig);
 996     killall(0, kidpids);
 997 }
 998 # endif
 999
1000 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
1001                          const EVP_MD *cert_id_md, X509 *issuer,
1002                          STACK_OF(OCSP_CERTID) *ids)
1003 {
1004     OCSP_CERTID *id;
1005
1006     if (issuer == NULL) {
1007         BIO_printf(bio_err, "No issuer certificate specified\n");
1008         return 0;
1009     }
1010     if (*req == NULL)
1011         *req = OCSP_REQUEST_new();
1012     if (*req == NULL)
1013         goto err;
1014     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
1015     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1016         goto err;
1017     if (!OCSP_request_add0_id(*req, id))
1018         goto err;
1019     return 1;
1020
1021  err:
1022     BIO_printf(bio_err, "Error Creating OCSP request\n");
1023     return 0;
1024 }
1025
1026 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
1027                            const EVP_MD *cert_id_md, X509 *issuer,
1028                            STACK_OF(OCSP_CERTID) *ids)
1029 {
1030     OCSP_CERTID *id;
1031     X509_NAME *iname;
1032     ASN1_BIT_STRING *ikey;
1033     ASN1_INTEGER *sno;
1034
1035     if (issuer == NULL) {
1036         BIO_printf(bio_err, "No issuer certificate specified\n");
1037         return 0;
1038     }
1039     if (*req == NULL)
1040         *req = OCSP_REQUEST_new();
1041     if (*req == NULL)
1042         goto err;
1043     iname = X509_get_subject_name(issuer);
1044     ikey = X509_get0_pubkey_bitstr(issuer);
1045     sno = s2i_ASN1_INTEGER(NULL, serial);
1046     if (sno == NULL) {
1047         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
1048         return 0;
1049     }
1050     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
1051     ASN1_INTEGER_free(sno);
1052     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1053         goto err;
1054     if (!OCSP_request_add0_id(*req, id))
1055         goto err;
1056     return 1;
1057
1058  err:
1059     BIO_printf(bio_err, "Error Creating OCSP request\n");
1060     return 0;
1061 }
1062
1063 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
1064                               STACK_OF(OPENSSL_STRING) *names,
1065                               STACK_OF(OCSP_CERTID) *ids, long nsec,
1066                               long maxage)
1067 {
1068     OCSP_CERTID *id;
1069     const char *name;
1070     int i, status, reason;
1071     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1072
1073     if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
1074         || !sk_OCSP_CERTID_num(ids))
1075         return;
1076
1077     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
1078         id = sk_OCSP_CERTID_value(ids, i);
1079         name = sk_OPENSSL_STRING_value(names, i);
1080         BIO_printf(out, "%s: ", name);
1081
1082         if (!OCSP_resp_find_status(bs, id, &status, &reason,
1083                                    &rev, &thisupd, &nextupd)) {
1084             BIO_puts(out, "ERROR: No Status found.\n");
1085             continue;
1086         }
1087
1088         /*
1089          * Check validity: if invalid write to output BIO so we know which
1090          * response this refers to.
1091          */
1092         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1093             BIO_puts(out, "WARNING: Status times invalid.\n");
1094             ERR_print_errors(out);
1095         }
1096         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1097
1098         BIO_puts(out, "\tThis Update: ");
1099         ASN1_GENERALIZEDTIME_print(out, thisupd);
1100         BIO_puts(out, "\n");
1101
1102         if (nextupd) {
1103             BIO_puts(out, "\tNext Update: ");
1104             ASN1_GENERALIZEDTIME_print(out, nextupd);
1105             BIO_puts(out, "\n");
1106         }
1107
1108         if (status != V_OCSP_CERTSTATUS_REVOKED)
1109             continue;
1110
1111         if (reason != -1)
1112             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1113
1114         BIO_puts(out, "\tRevocation Time: ");
1115         ASN1_GENERALIZEDTIME_print(out, rev);
1116         BIO_puts(out, "\n");
1117     }
1118 }
1119
1120 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1121                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1122                               EVP_PKEY *rkey, const EVP_MD *rmd,
1123                               STACK_OF(OPENSSL_STRING) *sigopts,
1124                               STACK_OF(X509) *rother, unsigned long flags,
1125                               int nmin, int ndays, int badsig)
1126 {
1127     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1128     OCSP_CERTID *cid;
1129     OCSP_BASICRESP *bs = NULL;
1130     int i, id_count;
1131     EVP_MD_CTX *mctx = NULL;
1132     EVP_PKEY_CTX *pkctx = NULL;
1133
1134     id_count = OCSP_request_onereq_count(req);
1135
1136     if (id_count <= 0) {
1137         *resp =
1138             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1139         goto end;
1140     }
1141
1142     bs = OCSP_BASICRESP_new();
1143     thisupd = X509_gmtime_adj(NULL, 0);
1144     if (ndays != -1)
1145         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1146
1147     /* Examine each certificate id in the request */
1148     for (i = 0; i < id_count; i++) {
1149         OCSP_ONEREQ *one;
1150         ASN1_INTEGER *serial;
1151         char **inf;
1152         int jj;
1153         int found = 0;
1154         ASN1_OBJECT *cert_id_md_oid;
1155         const EVP_MD *cert_id_md;
1156         one = OCSP_request_onereq_get0(req, i);
1157         cid = OCSP_onereq_get0_id(one);
1158
1159         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1160
1161         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1162         if (cert_id_md == NULL) {
1163             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1164                                          NULL);
1165             goto end;
1166         }
1167         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1168             X509 *ca_cert = sk_X509_value(ca, jj);
1169             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1170
1171             if (OCSP_id_issuer_cmp(ca_id, cid) == 0)
1172                 found = 1;
1173
1174             OCSP_CERTID_free(ca_id);
1175         }
1176
1177         if (!found) {
1178             OCSP_basic_add1_status(bs, cid,
1179                                    V_OCSP_CERTSTATUS_UNKNOWN,
1180                                    0, NULL, thisupd, nextupd);
1181             continue;
1182         }
1183         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1184         inf = lookup_serial(db, serial);
1185         if (inf == NULL) {
1186             OCSP_basic_add1_status(bs, cid,
1187                                    V_OCSP_CERTSTATUS_UNKNOWN,
1188                                    0, NULL, thisupd, nextupd);
1189         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1190             OCSP_basic_add1_status(bs, cid,
1191                                    V_OCSP_CERTSTATUS_GOOD,
1192                                    0, NULL, thisupd, nextupd);
1193         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1194             ASN1_OBJECT *inst = NULL;
1195             ASN1_TIME *revtm = NULL;
1196             ASN1_GENERALIZEDTIME *invtm = NULL;
1197             OCSP_SINGLERESP *single;
1198             int reason = -1;
1199             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1200             single = OCSP_basic_add1_status(bs, cid,
1201                                             V_OCSP_CERTSTATUS_REVOKED,
1202                                             reason, revtm, thisupd, nextupd);
1203             if (invtm != NULL)
1204                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1205                                              invtm, 0, 0);
1206             else if (inst != NULL)
1207                 OCSP_SINGLERESP_add1_ext_i2d(single,
1208                                              NID_hold_instruction_code, inst,
1209                                              0, 0);
1210             ASN1_OBJECT_free(inst);
1211             ASN1_TIME_free(revtm);
1212             ASN1_GENERALIZEDTIME_free(invtm);
1213         }
1214     }
1215
1216     OCSP_copy_nonce(bs, req);
1217
1218     mctx = EVP_MD_CTX_new();
1219     if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1220         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1221         goto end;
1222     }
1223     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1224         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1225
1226         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1227             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1228             ERR_print_errors(bio_err);
1229             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1230                                          NULL);
1231             goto end;
1232         }
1233     }
1234     OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags);
1235
1236     if (badsig) {
1237         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1238         corrupt_signature(sig);
1239     }
1240
1241     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1242
1243  end:
1244     EVP_MD_CTX_free(mctx);
1245     ASN1_TIME_free(thisupd);
1246     ASN1_TIME_free(nextupd);
1247     OCSP_BASICRESP_free(bs);
1248 }
1249
1250 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1251 {
1252     int i;
1253     BIGNUM *bn = NULL;
1254     char *itmp, *row[DB_NUMBER], **rrow;
1255     for (i = 0; i < DB_NUMBER; i++)
1256         row[i] = NULL;
1257     bn = ASN1_INTEGER_to_BN(ser, NULL);
1258     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1259                                  * point and abort */
1260     if (BN_is_zero(bn))
1261         itmp = OPENSSL_strdup("00");
1262     else
1263         itmp = BN_bn2hex(bn);
1264     row[DB_serial] = itmp;
1265     BN_free(bn);
1266     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1267     OPENSSL_free(itmp);
1268     return rrow;
1269 }
1270
1271 /* Quick and dirty OCSP server: read in and parse input request */
1272
1273 static BIO *init_responder(const char *port)
1274 {
1275 # ifdef OPENSSL_NO_SOCK
1276     BIO_printf(bio_err,
1277                "Error setting up accept BIO - sockets not supported.\n");
1278     return NULL;
1279 # else
1280     BIO *acbio = NULL, *bufbio = NULL;
1281
1282     bufbio = BIO_new(BIO_f_buffer());
1283     if (bufbio == NULL)
1284         goto err;
1285     acbio = BIO_new(BIO_s_accept());
1286     if (acbio == NULL
1287         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1288         || BIO_set_accept_port(acbio, port) < 0) {
1289         log_message(LOG_ERR, "Error setting up accept BIO");
1290         goto err;
1291     }
1292
1293     BIO_set_accept_bios(acbio, bufbio);
1294     bufbio = NULL;
1295     if (BIO_do_accept(acbio) <= 0) {
1296         log_message(LOG_ERR, "Error starting accept");
1297         goto err;
1298     }
1299
1300     return acbio;
1301
1302  err:
1303     BIO_free_all(acbio);
1304     BIO_free(bufbio);
1305     return NULL;
1306 # endif
1307 }
1308
1309 # ifndef OPENSSL_NO_SOCK
1310 /*
1311  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1312  */
1313 static int urldecode(char *p)
1314 {
1315     unsigned char *out = (unsigned char *)p;
1316     unsigned char *save = out;
1317
1318     for (; *p; p++) {
1319         if (*p != '%')
1320             *out++ = *p;
1321         else if (isxdigit(_UC(p[1])) && isxdigit(_UC(p[2]))) {
1322             /* Don't check, can't fail because of ixdigit() call. */
1323             *out++ = (OPENSSL_hexchar2int(p[1]) << 4)
1324                    | OPENSSL_hexchar2int(p[2]);
1325             p += 2;
1326         }
1327         else
1328             return -1;
1329     }
1330     *out = '\0';
1331     return (int)(out - save);
1332 }
1333 # endif
1334
1335 # ifdef OCSP_DAEMON
1336 static void sock_timeout(int signum)
1337 {
1338     if (acfd != (int)INVALID_SOCKET)
1339         (void)shutdown(acfd, SHUT_RD);
1340 }
1341 # endif
1342
1343 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1344                         int timeout)
1345 {
1346 # ifdef OPENSSL_NO_SOCK
1347     return 0;
1348 # else
1349     int len;
1350     OCSP_REQUEST *req = NULL;
1351     char inbuf[2048], reqbuf[2048];
1352     char *p, *q;
1353     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1354     const char *client;
1355
1356     *preq = NULL;
1357
1358     /* Connection loss before accept() is routine, ignore silently */
1359     if (BIO_do_accept(acbio) <= 0)
1360         return 0;
1361
1362     cbio = BIO_pop(acbio);
1363     *pcbio = cbio;
1364     client = BIO_get_peer_name(cbio);
1365
1366 #  ifdef OCSP_DAEMON
1367     if (timeout > 0) {
1368         (void) BIO_get_fd(cbio, &acfd);
1369         alarm(timeout);
1370     }
1371 #  endif
1372
1373     /* Read the request line. */
1374     len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
1375     if (len <= 0)
1376         goto out;
1377
1378     if (strncmp(reqbuf, "GET ", 4) == 0) {
1379         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1380         for (p = reqbuf + 4; *p == ' '; ++p)
1381             continue;
1382         if (*p != '/') {
1383             log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
1384             goto out;
1385         }
1386         p++;
1387
1388         /* Splice off the HTTP version identifier. */
1389         for (q = p; *q; q++)
1390             if (*q == ' ')
1391                 break;
1392         if (strncmp(q, " HTTP/1.", 8) != 0) {
1393             log_message(LOG_INFO,
1394                         "Invalid request -- bad HTTP version: %s", client);
1395             goto out;
1396         }
1397         *q = '\0';
1398
1399         /*
1400          * Skip "GET / HTTP..." requests often used by load-balancers
1401          */
1402         if (p[1] == '\0')
1403             goto out;
1404
1405         len = urldecode(p);
1406         if (len <= 0) {
1407             log_message(LOG_INFO,
1408                         "Invalid request -- bad URL encoding: %s", client);
1409             goto out;
1410         }
1411         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1412             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1413             log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
1414             goto out;
1415         }
1416         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1417         getbio = BIO_push(b64, getbio);
1418     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1419         log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
1420         goto out;
1421     }
1422
1423     /* Read and skip past the headers. */
1424     for (;;) {
1425         len = BIO_gets(cbio, inbuf, sizeof(inbuf));
1426         if (len <= 0)
1427             goto out;
1428         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1429             break;
1430     }
1431
1432 #  ifdef OCSP_DAEMON
1433     /* Clear alarm before we close the client socket */
1434     alarm(0);
1435     timeout = 0;
1436 #  endif
1437
1438     /* Try to read OCSP request */
1439     if (getbio != NULL) {
1440         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1441         BIO_free_all(getbio);
1442     } else {
1443         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1444     }
1445
1446     if (req == NULL)
1447         log_message(LOG_ERR, "Error parsing OCSP request");
1448
1449     *preq = req;
1450
1451 out:
1452 #  ifdef OCSP_DAEMON
1453     if (timeout > 0)
1454         alarm(0);
1455     acfd = (int)INVALID_SOCKET;
1456 #  endif
1457     return 1;
1458 # endif
1459 }
1460
1461 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1462 {
1463     char http_resp[] =
1464         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1465         "Content-Length: %d\r\n\r\n";
1466     if (cbio == NULL)
1467         return 0;
1468     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1469     i2d_OCSP_RESPONSE_bio(cbio, resp);
1470     (void)BIO_flush(cbio);
1471     return 1;
1472 }
1473
1474 # ifndef OPENSSL_NO_SOCK
1475 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
1476                                       const char *path,
1477                                       const STACK_OF(CONF_VALUE) *headers,
1478                                       OCSP_REQUEST *req, int req_timeout)
1479 {
1480     int fd;
1481     int rv;
1482     int i;
1483     int add_host = 1;
1484     OCSP_REQ_CTX *ctx = NULL;
1485     OCSP_RESPONSE *rsp = NULL;
1486     fd_set confds;
1487     struct timeval tv;
1488
1489     if (req_timeout != -1)
1490         BIO_set_nbio(cbio, 1);
1491
1492     rv = BIO_do_connect(cbio);
1493
1494     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1495         BIO_puts(bio_err, "Error connecting BIO\n");
1496         return NULL;
1497     }
1498
1499     if (BIO_get_fd(cbio, &fd) < 0) {
1500         BIO_puts(bio_err, "Can't get connection fd\n");
1501         goto err;
1502     }
1503
1504     if (req_timeout != -1 && rv <= 0) {
1505         FD_ZERO(&confds);
1506         openssl_fdset(fd, &confds);
1507         tv.tv_usec = 0;
1508         tv.tv_sec = req_timeout;
1509         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1510         if (rv == 0) {
1511             BIO_puts(bio_err, "Timeout on connect\n");
1512             return NULL;
1513         }
1514     }
1515
1516     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1517     if (ctx == NULL)
1518         return NULL;
1519
1520     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1521         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1522         if (add_host == 1 && strcasecmp("host", hdr->name) == 0)
1523             add_host = 0;
1524         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1525             goto err;
1526     }
1527
1528     if (add_host == 1 && OCSP_REQ_CTX_add1_header(ctx, "Host", host) == 0)
1529         goto err;
1530
1531     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1532         goto err;
1533
1534     for (;;) {
1535         rv = OCSP_sendreq_nbio(&rsp, ctx);
1536         if (rv != -1)
1537             break;
1538         if (req_timeout == -1)
1539             continue;
1540         FD_ZERO(&confds);
1541         openssl_fdset(fd, &confds);
1542         tv.tv_usec = 0;
1543         tv.tv_sec = req_timeout;
1544         if (BIO_should_read(cbio)) {
1545             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1546         } else if (BIO_should_write(cbio)) {
1547             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1548         } else {
1549             BIO_puts(bio_err, "Unexpected retry condition\n");
1550             goto err;
1551         }
1552         if (rv == 0) {
1553             BIO_puts(bio_err, "Timeout on request\n");
1554             break;
1555         }
1556         if (rv == -1) {
1557             BIO_puts(bio_err, "Select error\n");
1558             break;
1559         }
1560
1561     }
1562  err:
1563     OCSP_REQ_CTX_free(ctx);
1564
1565     return rsp;
1566 }
1567
1568 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1569                                  const char *host, const char *path,
1570                                  const char *port, int use_ssl,
1571                                  STACK_OF(CONF_VALUE) *headers,
1572                                  int req_timeout)
1573 {
1574     BIO *cbio = NULL;
1575     SSL_CTX *ctx = NULL;
1576     OCSP_RESPONSE *resp = NULL;
1577
1578     cbio = BIO_new_connect(host);
1579     if (cbio == NULL) {
1580         BIO_printf(bio_err, "Error creating connect BIO\n");
1581         goto end;
1582     }
1583     if (port != NULL)
1584         BIO_set_conn_port(cbio, port);
1585     if (use_ssl == 1) {
1586         BIO *sbio;
1587         ctx = SSL_CTX_new(TLS_client_method());
1588         if (ctx == NULL) {
1589             BIO_printf(bio_err, "Error creating SSL context.\n");
1590             goto end;
1591         }
1592         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1593         sbio = BIO_new_ssl(ctx, 1);
1594         cbio = BIO_push(sbio, cbio);
1595     }
1596
1597     resp = query_responder(cbio, host, path, headers, req, req_timeout);
1598     if (resp == NULL)
1599         BIO_printf(bio_err, "Error querying OCSP responder\n");
1600  end:
1601     BIO_free_all(cbio);
1602     SSL_CTX_free(ctx);
1603     return resp;
1604 }
1605 # endif
1606
1607 #endif