apps/ocsp.c

   1 /*
   2  * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/opensslconf.h>
  11
  12 #ifdef OPENSSL_NO_OCSP
  13 NON_EMPTY_TRANSLATION_UNIT
  14 #else
  15 # ifdef OPENSSL_SYS_VMS
  16 #  define _XOPEN_SOURCE_EXTENDED/* So fd_set and friends get properly defined
  17                                  * on OpenVMS */
  18 # endif
  19
  20 # include <stdio.h>
  21 # include <stdlib.h>
  22 # include <string.h>
  23 # include <time.h>
  24 # include <ctype.h>
  25
  26 /* Needs to be included before the openssl headers */
  27 # include "apps.h"
  28 # include "progs.h"
  29 # include "internal/sockets.h"
  30 # include <openssl/e_os2.h>
  31 # include <openssl/crypto.h>
  32 # include <openssl/err.h>
  33 # include <openssl/ssl.h>
  34 # include <openssl/evp.h>
  35 # include <openssl/bn.h>
  36 # include <openssl/x509v3.h>
  37 # include <openssl/rand.h>
  38
  39 #ifndef HAVE_FORK
  40 # if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS)
  41 #  define HAVE_FORK 0
  42 # else
  43 #  define HAVE_FORK 1
  44 # endif
  45 #endif
  46
  47 #if HAVE_FORK
  48 # undef NO_FORK
  49 #else
  50 # define NO_FORK
  51 #endif
  52
  53 # if !defined(NO_FORK) && !defined(OPENSSL_NO_SOCK) \
  54      && !defined(OPENSSL_NO_POSIX_IO)
  55 #  define OCSP_DAEMON
  56 #  include <sys/types.h>
  57 #  include <sys/wait.h>
  58 #  include <syslog.h>
  59 #  include <signal.h>
  60 #  define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
  61 # else
  62 #  undef LOG_INFO
  63 #  undef LOG_WARNING
  64 #  undef LOG_ERR
  65 #  define LOG_INFO      0
  66 #  define LOG_WARNING   1
  67 #  define LOG_ERR       2
  68 # endif
  69
  70 # if defined(OPENSSL_SYS_VXWORKS)
  71 /* not supported */
  72 int setpgid(pid_t pid, pid_t pgid)
  73 {
  74     errno = ENOSYS;
  75     return 0;
  76 }
  77 /* not supported */
  78 pid_t fork(void)
  79 {
  80     errno = ENOSYS;
  81     return (pid_t) -1;
  82 }
  83 # endif
  84 /* Maximum leeway in validity period: default 5 minutes */
  85 # define MAX_VALIDITY_PERIOD    (5 * 60)
  86
  87 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
  88                          const EVP_MD *cert_id_md, X509 *issuer,
  89                          STACK_OF(OCSP_CERTID) *ids);
  90 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
  91                            const EVP_MD *cert_id_md, X509 *issuer,
  92                            STACK_OF(OCSP_CERTID) *ids);
  93 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
  94                               STACK_OF(OPENSSL_STRING) *names,
  95                               STACK_OF(OCSP_CERTID) *ids, long nsec,
  96                               long maxage);
  97 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
  98                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
  99                               EVP_PKEY *rkey, const EVP_MD *md,
 100                               STACK_OF(OPENSSL_STRING) *sigopts,
 101                               STACK_OF(X509) *rother, unsigned long flags,
 102                               int nmin, int ndays, int badsig,
 103                               const EVP_MD *resp_md);
 104
 105 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 106 static BIO *init_responder(const char *port);
 107 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, int timeout);
 108 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 109 static void log_message(int level, const char *fmt, ...);
 110 static char *prog;
 111 static int multi = 0;
 112
 113 # ifdef OCSP_DAEMON
 114 static int acfd = (int) INVALID_SOCKET;
 115 static int index_changed(CA_DB *);
 116 static void spawn_loop(void);
 117 static int print_syslog(const char *str, size_t len, void *levPtr);
 118 static void socket_timeout(int signum);
 119 # endif
 120
 121 typedef enum OPTION_choice {
 122     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 123     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 124     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 125     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 126     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 127     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 128     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 129     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 130     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE,
 131     OPT_NOCAPATH, OPT_NOCASTORE,
 132     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 133     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 134     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 135     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
 136     OPT_PASSIN,
 137     OPT_RCID,
 138     OPT_V_ENUM,
 139     OPT_MD,
 140     OPT_MULTI
 141 } OPTION_CHOICE;
 142
 143 const OPTIONS ocsp_options[] = {
 144     OPT_SECTION("General"),
 145     {"help", OPT_HELP, '-', "Display this summary"},
 146     {"ignore_err", OPT_IGNORE_ERR, '-',
 147      "Ignore error on OCSP request or response and continue running"},
 148     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 149     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 150     {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
 151     {"no-CAfile", OPT_NOCAFILE, '-',
 152      "Do not load the default certificates file"},
 153     {"no-CApath", OPT_NOCAPATH, '-',
 154      "Do not load certificates from the default certificates directory"},
 155     {"no-CAstore", OPT_NOCAPATH, '-',
 156      "Do not load certificates from the default certificates store"},
 157
 158     OPT_SECTION("Responder"),
 159     {"timeout", OPT_TIMEOUT, 'p',
 160      "Connection timeout (in seconds) to the OCSP responder"},
 161     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 162      "Don't include any certificates in response"},
 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     {"badsig", OPT_BADSIG, '-',
 169         "Corrupt last byte of loaded OSCP response signature (for test)"},
 170     {"CA", OPT_CA, '<', "CA certificate"},
 171     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 172     {"nrequest", OPT_REQUEST, 'p',
 173      "Number of requests to accept (default unlimited)"},
 174     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 175     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 176     {"sign_other", OPT_SIGN_OTHER, '<',
 177      "Additional certificates to include in signed request"},
 178     {"index", OPT_INDEX, '<', "Certificate status index file"},
 179     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 180     {"rsigner", OPT_RSIGNER, '<',
 181      "Responder certificate to sign responses with"},
 182     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 183     {"passin", OPT_PASSIN, 's', "Responder key pass phrase source"},
 184     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 185     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
 186     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
 187     {"header", OPT_HEADER, 's', "key=value header to add"},
 188     {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
 189     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
 190
 191     OPT_SECTION("Client"),
 192     {"url", OPT_URL, 's', "Responder URL"},
 193     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
 194     {"port", OPT_PORT, 'p', "Port to run responder on"},
 195     {"out", OPT_OUTFILE, '>', "Output filename"},
 196     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 197     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 198     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 199     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 200      "Don't check signature on response"},
 201     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 202      "Identify response by signing certificate key ID"},
 203     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 204      "Don't check signing certificate"},
 205     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 206     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 207     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 208     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 209     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 210      "Don't do additional checks on signing certificate"},
 211     {"no_explicit", OPT_NO_EXPLICIT, '-',
 212      "Do not explicitly check the chain, just verify the root"},
 213     {"trust_other", OPT_TRUST_OTHER, '-',
 214      "Don't verify additional certificates"},
 215     {"no_intern", OPT_NO_INTERN, '-',
 216      "Don't search certificates contained in response for signer"},
 217     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 218     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 219     {"verify_other", OPT_VERIFY_OTHER, '<',
 220      "Additional certificates to search for signer"},
 221     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 222     {"cert", OPT_CERT, '<', "Certificate to check"},
 223     {"serial", OPT_SERIAL, 's', "Serial number to check"},
 224     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 225      "Maximum validity discrepancy in seconds"},
 226     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 227     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 228     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 229     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 230     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 231
 232     OPT_V_OPTIONS,
 233     {NULL}
 234 };
 235
 236 int ocsp_main(int argc, char **argv)
 237 {
 238     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 239     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 240     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
 241     int trailing_md = 0;
 242     CA_DB *rdb = NULL;
 243     EVP_PKEY *key = NULL, *rkey = NULL;
 244     OCSP_BASICRESP *bs = NULL;
 245     OCSP_REQUEST *req = NULL;
 246     OCSP_RESPONSE *resp = NULL;
 247     STACK_OF(CONF_VALUE) *headers = NULL;
 248     STACK_OF(OCSP_CERTID) *ids = NULL;
 249     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 250     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 251     STACK_OF(X509) *issuers = NULL;
 252     X509 *issuer = NULL, *cert = NULL;
 253     STACK_OF(X509) *rca_cert = NULL;
 254     const EVP_MD *resp_certid_md = NULL;
 255     X509 *signer = NULL, *rsigner = NULL;
 256     X509_STORE *store = NULL;
 257     X509_VERIFY_PARAM *vpm = NULL;
 258     const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
 259     char *header, *value;
 260     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 261     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 262     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 263     char *rsignfile = NULL, *rkeyfile = NULL;
 264     char *passinarg = NULL, *passin = NULL;
 265     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 266     char *signfile = NULL, *keyfile = NULL;
 267     char *thost = NULL, *tport = NULL, *tpath = NULL;
 268     int noCAfile = 0, noCApath = 0, noCAstore = 0;
 269     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 270     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 271     int req_text = 0, resp_text = 0, ret = 1;
 272     int req_timeout = -1;
 273     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 274     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 275     OPTION_CHOICE o;
 276
 277     reqnames = sk_OPENSSL_STRING_new_null();
 278     if (reqnames == NULL)
 279         goto end;
 280     ids = sk_OCSP_CERTID_new_null();
 281     if (ids == NULL)
 282         goto end;
 283     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 284         return 1;
 285
 286     prog = opt_init(argc, argv, ocsp_options);
 287     while ((o = opt_next()) != OPT_EOF) {
 288         switch (o) {
 289         case OPT_EOF:
 290         case OPT_ERR:
 291  opthelp:
 292             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 293             goto end;
 294         case OPT_HELP:
 295             ret = 0;
 296             opt_help(ocsp_options);
 297             goto end;
 298         case OPT_OUTFILE:
 299             outfile = opt_arg();
 300             break;
 301         case OPT_TIMEOUT:
 302 #ifndef OPENSSL_NO_SOCK
 303             req_timeout = atoi(opt_arg());
 304 #endif
 305             break;
 306         case OPT_URL:
 307             OPENSSL_free(thost);
 308             OPENSSL_free(tport);
 309             OPENSSL_free(tpath);
 310             thost = tport = tpath = NULL;
 311             if (!OSSL_HTTP_parse_url(opt_arg(),
 312                                      &host, &port, &path, &use_ssl)) {
 313                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 314                 goto end;
 315             }
 316             thost = host;
 317             tport = port;
 318             tpath = path;
 319             break;
 320         case OPT_HOST:
 321             host = opt_arg();
 322             break;
 323         case OPT_PORT:
 324             port = opt_arg();
 325             break;
 326         case OPT_IGNORE_ERR:
 327             ignore_err = 1;
 328             break;
 329         case OPT_NOVERIFY:
 330             noverify = 1;
 331             break;
 332         case OPT_NONCE:
 333             add_nonce = 2;
 334             break;
 335         case OPT_NO_NONCE:
 336             add_nonce = 0;
 337             break;
 338         case OPT_RESP_NO_CERTS:
 339             rflags |= OCSP_NOCERTS;
 340             break;
 341         case OPT_RESP_KEY_ID:
 342             rflags |= OCSP_RESPID_KEY;
 343             break;
 344         case OPT_NO_CERTS:
 345             sign_flags |= OCSP_NOCERTS;
 346             break;
 347         case OPT_NO_SIGNATURE_VERIFY:
 348             verify_flags |= OCSP_NOSIGS;
 349             break;
 350         case OPT_NO_CERT_VERIFY:
 351             verify_flags |= OCSP_NOVERIFY;
 352             break;
 353         case OPT_NO_CHAIN:
 354             verify_flags |= OCSP_NOCHAIN;
 355             break;
 356         case OPT_NO_CERT_CHECKS:
 357             verify_flags |= OCSP_NOCHECKS;
 358             break;
 359         case OPT_NO_EXPLICIT:
 360             verify_flags |= OCSP_NOEXPLICIT;
 361             break;
 362         case OPT_TRUST_OTHER:
 363             verify_flags |= OCSP_TRUSTOTHER;
 364             break;
 365         case OPT_NO_INTERN:
 366             verify_flags |= OCSP_NOINTERN;
 367             break;
 368         case OPT_BADSIG:
 369             badsig = 1;
 370             break;
 371         case OPT_TEXT:
 372             req_text = resp_text = 1;
 373             break;
 374         case OPT_REQ_TEXT:
 375             req_text = 1;
 376             break;
 377         case OPT_RESP_TEXT:
 378             resp_text = 1;
 379             break;
 380         case OPT_REQIN:
 381             reqin = opt_arg();
 382             break;
 383         case OPT_RESPIN:
 384             respin = opt_arg();
 385             break;
 386         case OPT_SIGNER:
 387             signfile = opt_arg();
 388             break;
 389         case OPT_VAFILE:
 390             verify_certfile = opt_arg();
 391             verify_flags |= OCSP_TRUSTOTHER;
 392             break;
 393         case OPT_SIGN_OTHER:
 394             sign_certfile = opt_arg();
 395             break;
 396         case OPT_VERIFY_OTHER:
 397             verify_certfile = opt_arg();
 398             break;
 399         case OPT_CAFILE:
 400             CAfile = opt_arg();
 401             break;
 402         case OPT_CAPATH:
 403             CApath = opt_arg();
 404             break;
 405         case OPT_CASTORE:
 406             CAstore = opt_arg();
 407             break;
 408         case OPT_NOCAFILE:
 409             noCAfile = 1;
 410             break;
 411         case OPT_NOCAPATH:
 412             noCApath = 1;
 413             break;
 414         case OPT_NOCASTORE:
 415             noCAstore = 1;
 416             break;
 417         case OPT_V_CASES:
 418             if (!opt_verify(o, vpm))
 419                 goto end;
 420             vpmtouched++;
 421             break;
 422         case OPT_VALIDITY_PERIOD:
 423             opt_long(opt_arg(), &nsec);
 424             break;
 425         case OPT_STATUS_AGE:
 426             opt_long(opt_arg(), &maxage);
 427             break;
 428         case OPT_SIGNKEY:
 429             keyfile = opt_arg();
 430             break;
 431         case OPT_REQOUT:
 432             reqout = opt_arg();
 433             break;
 434         case OPT_RESPOUT:
 435             respout = opt_arg();
 436             break;
 437         case OPT_PATH:
 438             path = opt_arg();
 439             break;
 440         case OPT_ISSUER:
 441             issuer = load_cert(opt_arg(), FORMAT_PEM, "issuer certificate");
 442             if (issuer == NULL)
 443                 goto end;
 444             if (issuers == NULL) {
 445                 if ((issuers = sk_X509_new_null()) == NULL)
 446                     goto end;
 447             }
 448             if (!sk_X509_push(issuers, issuer))
 449                 goto end;
 450             break;
 451         case OPT_CERT:
 452             X509_free(cert);
 453             cert = load_cert(opt_arg(), FORMAT_PEM, "certificate");
 454             if (cert == NULL)
 455                 goto end;
 456             if (cert_id_md == NULL)
 457                 cert_id_md = EVP_sha1();
 458             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 459                 goto end;
 460             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 461                 goto end;
 462             trailing_md = 0;
 463             break;
 464         case OPT_SERIAL:
 465             if (cert_id_md == NULL)
 466                 cert_id_md = EVP_sha1();
 467             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 468                 goto end;
 469             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 470                 goto end;
 471             trailing_md = 0;
 472             break;
 473         case OPT_INDEX:
 474             ridx_filename = opt_arg();
 475             break;
 476         case OPT_CA:
 477             rca_filename = opt_arg();
 478             break;
 479         case OPT_NMIN:
 480             opt_int(opt_arg(), &nmin);
 481             if (ndays == -1)
 482                 ndays = 0;
 483             break;
 484         case OPT_REQUEST:
 485             opt_int(opt_arg(), &accept_count);
 486             break;
 487         case OPT_NDAYS:
 488             ndays = atoi(opt_arg());
 489             break;
 490         case OPT_RSIGNER:
 491             rsignfile = opt_arg();
 492             break;
 493         case OPT_RKEY:
 494             rkeyfile = opt_arg();
 495             break;
 496         case OPT_PASSIN:
 497             passinarg = opt_arg();
 498             break;
 499         case OPT_ROTHER:
 500             rcertfile = opt_arg();
 501             break;
 502         case OPT_RMD:   /* Response MessageDigest */
 503             if (!opt_md(opt_arg(), &rsign_md))
 504                 goto end;
 505             break;
 506         case OPT_RSIGOPT:
 507             if (rsign_sigopts == NULL)
 508                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
 509             if (rsign_sigopts == NULL || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
 510                 goto end;
 511             break;
 512         case OPT_HEADER:
 513             header = opt_arg();
 514             value = strchr(header, '=');
 515             if (value == NULL) {
 516                 BIO_printf(bio_err, "Missing = in header key=value\n");
 517                 goto opthelp;
 518             }
 519             *value++ = '\0';
 520             if (!X509V3_add_value(header, value, &headers))
 521                 goto end;
 522             break;
 523         case OPT_RCID:
 524             resp_certid_md = EVP_get_digestbyname(opt_arg());
 525             if (resp_certid_md == NULL)
 526                 goto opthelp;
 527             break;
 528         case OPT_MD:
 529             if (trailing_md) {
 530                 BIO_printf(bio_err,
 531                            "%s: Digest must be before -cert or -serial\n",
 532                            prog);
 533                 goto opthelp;
 534             }
 535             if (!opt_md(opt_unknown(), &cert_id_md))
 536                 goto opthelp;
 537             trailing_md = 1;
 538             break;
 539         case OPT_MULTI:
 540 # ifdef OCSP_DAEMON
 541             multi = atoi(opt_arg());
 542 # endif
 543             break;
 544         }
 545     }
 546     if (trailing_md) {
 547         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
 548                    prog);
 549         goto opthelp;
 550     }
 551     argc = opt_num_rest();
 552     if (argc != 0)
 553         goto opthelp;
 554
 555     /* Have we anything to do? */
 556     if (req == NULL && reqin == NULL
 557         && respin == NULL && !(port != NULL && ridx_filename != NULL))
 558         goto opthelp;
 559
 560     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 561     if (out == NULL)
 562         goto end;
 563
 564     if (req == NULL && (add_nonce != 2))
 565         add_nonce = 0;
 566
 567     if (req == NULL && reqin != NULL) {
 568         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 569         if (derbio == NULL)
 570             goto end;
 571         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 572         BIO_free(derbio);
 573         if (req == NULL) {
 574             BIO_printf(bio_err, "Error reading OCSP request\n");
 575             goto end;
 576         }
 577     }
 578
 579     if (req == NULL && port != NULL) {
 580         acbio = init_responder(port);
 581         if (acbio == NULL)
 582             goto end;
 583     }
 584
 585     if (rsignfile != NULL) {
 586         if (rkeyfile == NULL)
 587             rkeyfile = rsignfile;
 588         rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
 589         if (rsigner == NULL) {
 590             BIO_printf(bio_err, "Error loading responder certificate\n");
 591             goto end;
 592         }
 593         if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
 594                         NULL, "CA certificate"))
 595             goto end;
 596         if (rcertfile != NULL) {
 597             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
 598                             "responder other certificates"))
 599                 goto end;
 600         }
 601         if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 602             BIO_printf(bio_err, "Error getting password\n");
 603             goto end;
 604         }
 605         rkey = load_key(rkeyfile, FORMAT_PEM, 0, passin, NULL,
 606                         "responder private key");
 607         if (rkey == NULL)
 608             goto end;
 609     }
 610
 611     if (ridx_filename != NULL
 612         && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
 613         BIO_printf(bio_err,
 614                    "Responder mode requires certificate, key, and CA.\n");
 615         goto end;
 616     }
 617
 618     if (ridx_filename != NULL) {
 619         rdb = load_index(ridx_filename, NULL);
 620         if (rdb == NULL || index_index(rdb) <= 0) {
 621             ret = 1;
 622             goto end;
 623         }
 624     }
 625
 626 # ifdef OCSP_DAEMON
 627     if (multi && acbio != NULL)
 628         spawn_loop();
 629     if (acbio != NULL && req_timeout > 0)
 630         signal(SIGALRM, socket_timeout);
 631 #endif
 632
 633     if (acbio != NULL)
 634         log_message(LOG_INFO, "waiting for OCSP client connections...");
 635
 636 redo_accept:
 637
 638     if (acbio != NULL) {
 639 # ifdef OCSP_DAEMON
 640         if (index_changed(rdb)) {
 641             CA_DB *newrdb = load_index(ridx_filename, NULL);
 642
 643             if (newrdb != NULL && index_index(newrdb) > 0) {
 644                 free_index(rdb);
 645                 rdb = newrdb;
 646             } else {
 647                 free_index(newrdb);
 648                 log_message(LOG_ERR, "error reloading updated index: %s",
 649                             ridx_filename);
 650             }
 651         }
 652 # endif
 653
 654         req = NULL;
 655         if (!do_responder(&req, &cbio, acbio, req_timeout))
 656             goto redo_accept;
 657
 658         if (req == NULL) {
 659             resp =
 660                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 661                                      NULL);
 662             send_ocsp_response(cbio, resp);
 663             goto done_resp;
 664         }
 665     }
 666
 667     if (req == NULL
 668         && (signfile != NULL || reqout != NULL
 669             || host != NULL || add_nonce || ridx_filename != NULL)) {
 670         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 671         goto end;
 672     }
 673
 674     if (req != NULL && add_nonce) {
 675         if (!OCSP_request_add1_nonce(req, NULL, -1))
 676             goto end;
 677     }
 678
 679     if (signfile != NULL) {
 680         if (keyfile == NULL)
 681             keyfile = signfile;
 682         signer = load_cert(signfile, FORMAT_PEM, "signer certificate");
 683         if (signer == NULL) {
 684             BIO_printf(bio_err, "Error loading signer certificate\n");
 685             goto end;
 686         }
 687         if (sign_certfile != NULL) {
 688             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL,
 689                             "signer certificates"))
 690                 goto end;
 691         }
 692         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 693                        "signer private key");
 694         if (key == NULL)
 695             goto end;
 696
 697         if (!OCSP_request_sign
 698             (req, signer, key, NULL, sign_other, sign_flags)) {
 699             BIO_printf(bio_err, "Error signing OCSP request\n");
 700             goto end;
 701         }
 702     }
 703
 704     if (req_text && req != NULL)
 705         OCSP_REQUEST_print(out, req, 0);
 706
 707     if (reqout != NULL) {
 708         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 709         if (derbio == NULL)
 710             goto end;
 711         i2d_OCSP_REQUEST_bio(derbio, req);
 712         BIO_free(derbio);
 713     }
 714
 715     if (rdb != NULL) {
 716         make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
 717                            rsign_md, rsign_sigopts, rother, rflags, nmin, ndays, badsig,
 718                            resp_certid_md);
 719         if (cbio != NULL)
 720             send_ocsp_response(cbio, resp);
 721     } else if (host != NULL) {
 722 # ifndef OPENSSL_NO_SOCK
 723         resp = process_responder(req, host, path,
 724                                  port, use_ssl, headers, req_timeout);
 725         if (resp == NULL)
 726             goto end;
 727 # else
 728         BIO_printf(bio_err,
 729                    "Error creating connect BIO - sockets not supported.\n");
 730         goto end;
 731 # endif
 732     } else if (respin != NULL) {
 733         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 734         if (derbio == NULL)
 735             goto end;
 736         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 737         BIO_free(derbio);
 738         if (resp == NULL) {
 739             BIO_printf(bio_err, "Error reading OCSP response\n");
 740             goto end;
 741         }
 742     } else {
 743         ret = 0;
 744         goto end;
 745     }
 746
 747  done_resp:
 748
 749     if (respout != NULL) {
 750         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 751         if (derbio == NULL)
 752             goto end;
 753         i2d_OCSP_RESPONSE_bio(derbio, resp);
 754         BIO_free(derbio);
 755     }
 756
 757     i = OCSP_response_status(resp);
 758     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 759         BIO_printf(out, "Responder Error: %s (%d)\n",
 760                    OCSP_response_status_str(i), i);
 761         if (!ignore_err)
 762                 goto end;
 763     }
 764
 765     if (resp_text)
 766         OCSP_RESPONSE_print(out, resp, 0);
 767
 768     /* If running as responder don't verify our own response */
 769     if (cbio != NULL) {
 770         /* If not unlimited, see if we took all we should. */
 771         if (accept_count != -1 && --accept_count <= 0) {
 772             ret = 0;
 773             goto end;
 774         }
 775         BIO_free_all(cbio);
 776         cbio = NULL;
 777         OCSP_REQUEST_free(req);
 778         req = NULL;
 779         OCSP_RESPONSE_free(resp);
 780         resp = NULL;
 781         goto redo_accept;
 782     }
 783     if (ridx_filename != NULL) {
 784         ret = 0;
 785         goto end;
 786     }
 787
 788     if (store == NULL) {
 789         store = setup_verify(CAfile, noCAfile, CApath, noCApath,
 790                              CAstore, noCAstore);
 791         if (!store)
 792             goto end;
 793     }
 794     if (vpmtouched)
 795         X509_STORE_set1_param(store, vpm);
 796     if (verify_certfile != NULL) {
 797         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
 798                         "validator certificate"))
 799             goto end;
 800     }
 801
 802     bs = OCSP_response_get1_basic(resp);
 803     if (bs == NULL) {
 804         BIO_printf(bio_err, "Error parsing response\n");
 805         goto end;
 806     }
 807
 808     ret = 0;
 809
 810     if (!noverify) {
 811         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 812             if (i == -1)
 813                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 814             else {
 815                 BIO_printf(bio_err, "Nonce Verify error\n");
 816                 ret = 1;
 817                 goto end;
 818             }
 819         }
 820
 821         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 822         if (i <= 0 && issuers) {
 823             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 824             if (i > 0)
 825                 ERR_clear_error();
 826         }
 827         if (i <= 0) {
 828             BIO_printf(bio_err, "Response Verify Failure\n");
 829             ERR_print_errors(bio_err);
 830             ret = 1;
 831         } else {
 832             BIO_printf(bio_err, "Response verify OK\n");
 833         }
 834     }
 835
 836     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 837
 838  end:
 839     ERR_print_errors(bio_err);
 840     X509_free(signer);
 841     X509_STORE_free(store);
 842     X509_VERIFY_PARAM_free(vpm);
 843     sk_OPENSSL_STRING_free(rsign_sigopts);
 844     EVP_PKEY_free(key);
 845     EVP_PKEY_free(rkey);
 846     X509_free(cert);
 847     sk_X509_pop_free(issuers, X509_free);
 848     X509_free(rsigner);
 849     sk_X509_pop_free(rca_cert, X509_free);
 850     free_index(rdb);
 851     BIO_free_all(cbio);
 852     BIO_free_all(acbio);
 853     BIO_free_all(out);
 854     OCSP_REQUEST_free(req);
 855     OCSP_RESPONSE_free(resp);
 856     OCSP_BASICRESP_free(bs);
 857     sk_OPENSSL_STRING_free(reqnames);
 858     sk_OCSP_CERTID_free(ids);
 859     sk_X509_pop_free(sign_other, X509_free);
 860     sk_X509_pop_free(verify_other, X509_free);
 861     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 862     OPENSSL_free(thost);
 863     OPENSSL_free(tport);
 864     OPENSSL_free(tpath);
 865
 866     return ret;
 867 }
 868
 869 static void
 870 log_message(int level, const char *fmt, ...)
 871 {
 872     va_list ap;
 873
 874     va_start(ap, fmt);
 875 # ifdef OCSP_DAEMON
 876     if (multi) {
 877         char buf[1024];
 878         if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
 879             syslog(level, "%s", buf);
 880         }
 881         if (level >= LOG_ERR)
 882             ERR_print_errors_cb(print_syslog, &level);
 883     }
 884 # endif
 885     if (!multi) {
 886         BIO_printf(bio_err, "%s: ", prog);
 887         BIO_vprintf(bio_err, fmt, ap);
 888         BIO_printf(bio_err, "\n");
 889     }
 890     va_end(ap);
 891 }
 892
 893 # ifdef OCSP_DAEMON
 894
 895 static int print_syslog(const char *str, size_t len, void *levPtr)
 896 {
 897     int level = *(int *)levPtr;
 898     int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
 899
 900     syslog(level, "%.*s", ilen, str);
 901
 902     return ilen;
 903 }
 904
 905 static int index_changed(CA_DB *rdb)
 906 {
 907     struct stat sb;
 908
 909     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
 910         if (rdb->dbst.st_mtime != sb.st_mtime
 911             || rdb->dbst.st_ctime != sb.st_ctime
 912             || rdb->dbst.st_ino != sb.st_ino
 913             || rdb->dbst.st_dev != sb.st_dev) {
 914             syslog(LOG_INFO, "index file changed, reloading");
 915             return 1;
 916         }
 917     }
 918     return 0;
 919 }
 920
 921 static void killall(int ret, pid_t *kidpids)
 922 {
 923     int i;
 924
 925     for (i = 0; i < multi; ++i)
 926         if (kidpids[i] != 0)
 927             (void)kill(kidpids[i], SIGTERM);
 928     OPENSSL_free(kidpids);
 929     sleep(1);
 930     exit(ret);
 931 }
 932
 933 static int termsig = 0;
 934
 935 static void noteterm (int sig)
 936 {
 937     termsig = sig;
 938 }
 939
 940 /*
 941  * Loop spawning up to `multi` child processes, only child processes return
 942  * from this function.  The parent process loops until receiving a termination
 943  * signal, kills extant children and exits without returning.
 944  */
 945 static void spawn_loop(void)
 946 {
 947     pid_t *kidpids = NULL;
 948     int status;
 949     int procs = 0;
 950     int i;
 951
 952     openlog(prog, LOG_PID, LOG_DAEMON);
 953
 954     if (setpgid(0, 0)) {
 955         syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
 956                strerror(errno));
 957         exit(1);
 958     }
 959     kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
 960     for (i = 0; i < multi; ++i)
 961         kidpids[i] = 0;
 962
 963     signal(SIGINT, noteterm);
 964     signal(SIGTERM, noteterm);
 965
 966     while (termsig == 0) {
 967         pid_t fpid;
 968
 969         /*
 970          * Wait for a child to replace when we're at the limit.
 971          * Slow down if a child exited abnormally or waitpid() < 0
 972          */
 973         while (termsig == 0 && procs >= multi) {
 974             if ((fpid = waitpid(-1, &status, 0)) > 0) {
 975                 for (i = 0; i < procs; ++i) {
 976                     if (kidpids[i] == fpid) {
 977                         kidpids[i] = 0;
 978                         --procs;
 979                         break;
 980                     }
 981                 }
 982                 if (i >= multi) {
 983                     syslog(LOG_ERR, "fatal: internal error: "
 984                            "no matching child slot for pid: %ld",
 985                            (long) fpid);
 986                     killall(1, kidpids);
 987                 }
 988                 if (status != 0) {
 989                     if (WIFEXITED(status))
 990                         syslog(LOG_WARNING, "child process: %ld, exit status: %d",
 991                                (long)fpid, WEXITSTATUS(status));
 992                     else if (WIFSIGNALED(status))
 993                         syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
 994                                (long)fpid, WTERMSIG(status),
 995 #ifdef WCOREDUMP
 996                                WCOREDUMP(status) ? " (core dumped)" :
 997 #endif
 998                                "");
 999                     sleep(1);
1000                 }
1001                 break;
1002             } else if (errno != EINTR) {
1003                 syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
1004                 killall(1, kidpids);
1005             }
1006         }
1007         if (termsig)
1008             break;
1009
1010         switch(fpid = fork()) {
1011         case -1:            /* error */
1012             /* System critically low on memory, pause and try again later */
1013             sleep(30);
1014             break;
1015         case 0:             /* child */
1016             OPENSSL_free(kidpids);
1017             signal(SIGINT, SIG_DFL);
1018             signal(SIGTERM, SIG_DFL);
1019             if (termsig)
1020                 _exit(0);
1021             if (RAND_poll() <= 0) {
1022                 syslog(LOG_ERR, "fatal: RAND_poll() failed");
1023                 _exit(1);
1024             }
1025             return;
1026         default:            /* parent */
1027             for (i = 0; i < multi; ++i) {
1028                 if (kidpids[i] == 0) {
1029                     kidpids[i] = fpid;
1030                     procs++;
1031                     break;
1032                 }
1033             }
1034             if (i >= multi) {
1035                 syslog(LOG_ERR, "fatal: internal error: no free child slots");
1036                 killall(1, kidpids);
1037             }
1038             break;
1039         }
1040     }
1041
1042     /* The loop above can only break on termsig */
1043     syslog(LOG_INFO, "terminating on signal: %d", termsig);
1044     killall(0, kidpids);
1045 }
1046 # endif
1047
1048 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
1049                          const EVP_MD *cert_id_md, X509 *issuer,
1050                          STACK_OF(OCSP_CERTID) *ids)
1051 {
1052     OCSP_CERTID *id;
1053
1054     if (issuer == NULL) {
1055         BIO_printf(bio_err, "No issuer certificate specified\n");
1056         return 0;
1057     }
1058     if (*req == NULL)
1059         *req = OCSP_REQUEST_new();
1060     if (*req == NULL)
1061         goto err;
1062     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
1063     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1064         goto err;
1065     if (!OCSP_request_add0_id(*req, id))
1066         goto err;
1067     return 1;
1068
1069  err:
1070     BIO_printf(bio_err, "Error Creating OCSP request\n");
1071     return 0;
1072 }
1073
1074 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
1075                            const EVP_MD *cert_id_md, X509 *issuer,
1076                            STACK_OF(OCSP_CERTID) *ids)
1077 {
1078     OCSP_CERTID *id;
1079     X509_NAME *iname;
1080     ASN1_BIT_STRING *ikey;
1081     ASN1_INTEGER *sno;
1082
1083     if (issuer == NULL) {
1084         BIO_printf(bio_err, "No issuer certificate specified\n");
1085         return 0;
1086     }
1087     if (*req == NULL)
1088         *req = OCSP_REQUEST_new();
1089     if (*req == NULL)
1090         goto err;
1091     iname = X509_get_subject_name(issuer);
1092     ikey = X509_get0_pubkey_bitstr(issuer);
1093     sno = s2i_ASN1_INTEGER(NULL, serial);
1094     if (sno == NULL) {
1095         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
1096         return 0;
1097     }
1098     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
1099     ASN1_INTEGER_free(sno);
1100     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1101         goto err;
1102     if (!OCSP_request_add0_id(*req, id))
1103         goto err;
1104     return 1;
1105
1106  err:
1107     BIO_printf(bio_err, "Error Creating OCSP request\n");
1108     return 0;
1109 }
1110
1111 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
1112                               STACK_OF(OPENSSL_STRING) *names,
1113                               STACK_OF(OCSP_CERTID) *ids, long nsec,
1114                               long maxage)
1115 {
1116     OCSP_CERTID *id;
1117     const char *name;
1118     int i, status, reason;
1119     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1120
1121     if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
1122         || !sk_OCSP_CERTID_num(ids))
1123         return;
1124
1125     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
1126         id = sk_OCSP_CERTID_value(ids, i);
1127         name = sk_OPENSSL_STRING_value(names, i);
1128         BIO_printf(out, "%s: ", name);
1129
1130         if (!OCSP_resp_find_status(bs, id, &status, &reason,
1131                                    &rev, &thisupd, &nextupd)) {
1132             BIO_puts(out, "ERROR: No Status found.\n");
1133             continue;
1134         }
1135
1136         /*
1137          * Check validity: if invalid write to output BIO so we know which
1138          * response this refers to.
1139          */
1140         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1141             BIO_puts(out, "WARNING: Status times invalid.\n");
1142             ERR_print_errors(out);
1143         }
1144         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1145
1146         BIO_puts(out, "\tThis Update: ");
1147         ASN1_GENERALIZEDTIME_print(out, thisupd);
1148         BIO_puts(out, "\n");
1149
1150         if (nextupd) {
1151             BIO_puts(out, "\tNext Update: ");
1152             ASN1_GENERALIZEDTIME_print(out, nextupd);
1153             BIO_puts(out, "\n");
1154         }
1155
1156         if (status != V_OCSP_CERTSTATUS_REVOKED)
1157             continue;
1158
1159         if (reason != -1)
1160             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1161
1162         BIO_puts(out, "\tRevocation Time: ");
1163         ASN1_GENERALIZEDTIME_print(out, rev);
1164         BIO_puts(out, "\n");
1165     }
1166 }
1167
1168 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1169                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1170                               EVP_PKEY *rkey, const EVP_MD *rmd,
1171                               STACK_OF(OPENSSL_STRING) *sigopts,
1172                               STACK_OF(X509) *rother, unsigned long flags,
1173                               int nmin, int ndays, int badsig,
1174                               const EVP_MD *resp_md)
1175 {
1176     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1177     OCSP_CERTID *cid;
1178     OCSP_BASICRESP *bs = NULL;
1179     int i, id_count;
1180     EVP_MD_CTX *mctx = NULL;
1181     EVP_PKEY_CTX *pkctx = NULL;
1182
1183     id_count = OCSP_request_onereq_count(req);
1184
1185     if (id_count <= 0) {
1186         *resp =
1187             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1188         goto end;
1189     }
1190
1191     bs = OCSP_BASICRESP_new();
1192     thisupd = X509_gmtime_adj(NULL, 0);
1193     if (ndays != -1)
1194         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1195
1196     /* Examine each certificate id in the request */
1197     for (i = 0; i < id_count; i++) {
1198         OCSP_ONEREQ *one;
1199         ASN1_INTEGER *serial;
1200         char **inf;
1201         int jj;
1202         int found = 0;
1203         ASN1_OBJECT *cert_id_md_oid;
1204         const EVP_MD *cert_id_md;
1205         OCSP_CERTID *cid_resp_md = NULL;
1206
1207         one = OCSP_request_onereq_get0(req, i);
1208         cid = OCSP_onereq_get0_id(one);
1209
1210         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1211
1212         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1213         if (cert_id_md == NULL) {
1214             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1215                                          NULL);
1216             goto end;
1217         }
1218         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1219             X509 *ca_cert = sk_X509_value(ca, jj);
1220             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1221
1222             if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
1223                 found = 1;
1224                 if (resp_md != NULL)
1225                     cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
1226             }
1227             OCSP_CERTID_free(ca_id);
1228         }
1229         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1230         inf = lookup_serial(db, serial);
1231
1232         /* at this point, we can have cid be an alias of cid_resp_md */
1233         cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
1234
1235         if (!found) {
1236             OCSP_basic_add1_status(bs, cid,
1237                                    V_OCSP_CERTSTATUS_UNKNOWN,
1238                                    0, NULL, thisupd, nextupd);
1239             continue;
1240         }
1241         if (inf == NULL) {
1242             OCSP_basic_add1_status(bs, cid,
1243                                    V_OCSP_CERTSTATUS_UNKNOWN,
1244                                    0, NULL, thisupd, nextupd);
1245         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1246             OCSP_basic_add1_status(bs, cid,
1247                                    V_OCSP_CERTSTATUS_GOOD,
1248                                    0, NULL, thisupd, nextupd);
1249         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1250             ASN1_OBJECT *inst = NULL;
1251             ASN1_TIME *revtm = NULL;
1252             ASN1_GENERALIZEDTIME *invtm = NULL;
1253             OCSP_SINGLERESP *single;
1254             int reason = -1;
1255
1256             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1257             single = OCSP_basic_add1_status(bs, cid,
1258                                             V_OCSP_CERTSTATUS_REVOKED,
1259                                             reason, revtm, thisupd, nextupd);
1260             if (invtm != NULL)
1261                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1262                                              invtm, 0, 0);
1263             else if (inst != NULL)
1264                 OCSP_SINGLERESP_add1_ext_i2d(single,
1265                                              NID_hold_instruction_code, inst,
1266                                              0, 0);
1267             ASN1_OBJECT_free(inst);
1268             ASN1_TIME_free(revtm);
1269             ASN1_GENERALIZEDTIME_free(invtm);
1270         }
1271         OCSP_CERTID_free(cid_resp_md);
1272     }
1273
1274     OCSP_copy_nonce(bs, req);
1275
1276     mctx = EVP_MD_CTX_new();
1277     if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1278         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1279         goto end;
1280     }
1281     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1282         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1283
1284         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1285             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1286             ERR_print_errors(bio_err);
1287             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1288                                          NULL);
1289             goto end;
1290         }
1291     }
1292     if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1293         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1294         goto end;
1295     }
1296
1297     if (badsig) {
1298         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1299         corrupt_signature(sig);
1300     }
1301
1302     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1303
1304  end:
1305     EVP_MD_CTX_free(mctx);
1306     ASN1_TIME_free(thisupd);
1307     ASN1_TIME_free(nextupd);
1308     OCSP_BASICRESP_free(bs);
1309 }
1310
1311 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1312 {
1313     int i;
1314     BIGNUM *bn = NULL;
1315     char *itmp, *row[DB_NUMBER], **rrow;
1316     for (i = 0; i < DB_NUMBER; i++)
1317         row[i] = NULL;
1318     bn = ASN1_INTEGER_to_BN(ser, NULL);
1319     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1320                                  * point and abort */
1321     if (BN_is_zero(bn))
1322         itmp = OPENSSL_strdup("00");
1323     else
1324         itmp = BN_bn2hex(bn);
1325     row[DB_serial] = itmp;
1326     BN_free(bn);
1327     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1328     OPENSSL_free(itmp);
1329     return rrow;
1330 }
1331
1332 /* Quick and dirty OCSP server: read in and parse input request */
1333
1334 static BIO *init_responder(const char *port)
1335 {
1336 # ifdef OPENSSL_NO_SOCK
1337     BIO_printf(bio_err,
1338                "Error setting up accept BIO - sockets not supported.\n");
1339     return NULL;
1340 # else
1341     BIO *acbio = NULL, *bufbio = NULL;
1342
1343     bufbio = BIO_new(BIO_f_buffer());
1344     if (bufbio == NULL)
1345         goto err;
1346     acbio = BIO_new(BIO_s_accept());
1347     if (acbio == NULL
1348         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1349         || BIO_set_accept_port(acbio, port) < 0) {
1350         log_message(LOG_ERR, "Error setting up accept BIO");
1351         goto err;
1352     }
1353
1354     BIO_set_accept_bios(acbio, bufbio);
1355     bufbio = NULL;
1356     if (BIO_do_accept(acbio) <= 0) {
1357         log_message(LOG_ERR, "Error starting accept");
1358         goto err;
1359     }
1360
1361     return acbio;
1362
1363  err:
1364     BIO_free_all(acbio);
1365     BIO_free(bufbio);
1366     return NULL;
1367 # endif
1368 }
1369
1370 # ifndef OPENSSL_NO_SOCK
1371 /*
1372  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1373  */
1374 static int urldecode(char *p)
1375 {
1376     unsigned char *out = (unsigned char *)p;
1377     unsigned char *save = out;
1378
1379     for (; *p; p++) {
1380         if (*p != '%')
1381             *out++ = *p;
1382         else if (isxdigit(_UC(p[1])) && isxdigit(_UC(p[2]))) {
1383             /* Don't check, can't fail because of ixdigit() call. */
1384             *out++ = (OPENSSL_hexchar2int(p[1]) << 4)
1385                    | OPENSSL_hexchar2int(p[2]);
1386             p += 2;
1387         }
1388         else
1389             return -1;
1390     }
1391     *out = '\0';
1392     return (int)(out - save);
1393 }
1394 # endif
1395
1396 # ifdef OCSP_DAEMON
1397 static void socket_timeout(int signum)
1398 {
1399     if (acfd != (int)INVALID_SOCKET)
1400         (void)shutdown(acfd, SHUT_RD);
1401 }
1402 # endif
1403
1404 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1405                         int timeout)
1406 {
1407 # ifdef OPENSSL_NO_SOCK
1408     return 0;
1409 # else
1410     int len;
1411     OCSP_REQUEST *req = NULL;
1412     char inbuf[2048], reqbuf[2048];
1413     char *p, *q;
1414     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1415     const char *client;
1416
1417     *preq = NULL;
1418
1419     /* Connection loss before accept() is routine, ignore silently */
1420     if (BIO_do_accept(acbio) <= 0)
1421         return 0;
1422
1423     cbio = BIO_pop(acbio);
1424     *pcbio = cbio;
1425     client = BIO_get_peer_name(cbio);
1426
1427 #  ifdef OCSP_DAEMON
1428     if (timeout > 0) {
1429         (void) BIO_get_fd(cbio, &acfd);
1430         alarm(timeout);
1431     }
1432 #  endif
1433
1434     /* Read the request line. */
1435     len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
1436     if (len <= 0)
1437         goto out;
1438
1439     if (strncmp(reqbuf, "GET ", 4) == 0) {
1440         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1441         for (p = reqbuf + 4; *p == ' '; ++p)
1442             continue;
1443         if (*p != '/') {
1444             log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
1445             goto out;
1446         }
1447         p++;
1448
1449         /* Splice off the HTTP version identifier. */
1450         for (q = p; *q; q++)
1451             if (*q == ' ')
1452                 break;
1453         if (strncmp(q, " HTTP/1.", 8) != 0) {
1454             log_message(LOG_INFO,
1455                         "Invalid request -- bad HTTP version: %s", client);
1456             goto out;
1457         }
1458         *q = '\0';
1459
1460         /*
1461          * Skip "GET / HTTP..." requests often used by load-balancers.  Note:
1462          * 'p' was incremented above to point to the first byte *after* the
1463          * leading slash, so with 'GET / ' it is now an empty string.
1464          */
1465         if (p[0] == '\0')
1466             goto out;
1467
1468         len = urldecode(p);
1469         if (len <= 0) {
1470             log_message(LOG_INFO,
1471                         "Invalid request -- bad URL encoding: %s", client);
1472             goto out;
1473         }
1474         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1475             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1476             log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
1477             goto out;
1478         }
1479         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1480         getbio = BIO_push(b64, getbio);
1481     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1482         log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
1483         goto out;
1484     }
1485
1486     /* Read and skip past the headers. */
1487     for (;;) {
1488         len = BIO_gets(cbio, inbuf, sizeof(inbuf));
1489         if (len <= 0)
1490             goto out;
1491         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1492             break;
1493     }
1494
1495 #  ifdef OCSP_DAEMON
1496     /* Clear alarm before we close the client socket */
1497     alarm(0);
1498     timeout = 0;
1499 #  endif
1500
1501     /* Try to read OCSP request */
1502     if (getbio != NULL) {
1503         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1504         BIO_free_all(getbio);
1505     } else {
1506         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1507     }
1508
1509     if (req == NULL)
1510         log_message(LOG_ERR, "Error parsing OCSP request");
1511
1512     *preq = req;
1513
1514 out:
1515 #  ifdef OCSP_DAEMON
1516     if (timeout > 0)
1517         alarm(0);
1518     acfd = (int)INVALID_SOCKET;
1519 #  endif
1520     return 1;
1521 # endif
1522 }
1523
1524 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1525 {
1526     char http_resp[] =
1527         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1528         "Content-Length: %d\r\n\r\n";
1529     if (cbio == NULL)
1530         return 0;
1531     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1532     i2d_OCSP_RESPONSE_bio(cbio, resp);
1533     (void)BIO_flush(cbio);
1534     return 1;
1535 }
1536
1537 # ifndef OPENSSL_NO_SOCK
1538 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1539                                  const char *host, const char *path,
1540                                  const char *port, int use_ssl,
1541                                  STACK_OF(CONF_VALUE) *headers,
1542                                  int req_timeout)
1543 {
1544     SSL_CTX *ctx = NULL;
1545     OCSP_RESPONSE *resp = NULL;
1546
1547     if (use_ssl == 1) {
1548         ctx = SSL_CTX_new(TLS_client_method());
1549         if (ctx == NULL) {
1550             BIO_printf(bio_err, "Error creating SSL context.\n");
1551             goto end;
1552         }
1553         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1554     }
1555
1556     resp = (OCSP_RESPONSE *)
1557         app_http_post_asn1(host, port, path, NULL, NULL /* no proxy used */,
1558                            ctx, headers, "application/ocsp-request",
1559                            (ASN1_VALUE *)req, ASN1_ITEM_rptr(OCSP_REQUEST),
1560                            req_timeout, ASN1_ITEM_rptr(OCSP_RESPONSE));
1561
1562     if (resp == NULL)
1563         BIO_printf(bio_err, "Error querying OCSP responder\n");
1564
1565  end:
1566     SSL_CTX_free(ctx);
1567     return resp;
1568 }
1569 # endif
1570
1571 #endif