apps/ocsp.c

   1 /*
   2  * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/opensslconf.h>
  11
  12 #ifdef OPENSSL_NO_OCSP
  13 NON_EMPTY_TRANSLATION_UNIT
  14 #else
  15 # ifdef OPENSSL_SYS_VMS
  16 #  define _XOPEN_SOURCE_EXTENDED/* So fd_set and friends get properly defined
  17                                  * on OpenVMS */
  18 # endif
  19
  20 # include <stdio.h>
  21 # include <stdlib.h>
  22 # include <string.h>
  23 # include <time.h>
  24 # include <ctype.h>
  25
  26 /* Needs to be included before the openssl headers */
  27 # include "apps.h"
  28 # include "progs.h"
  29 # include "internal/sockets.h"
  30 # include <openssl/e_os2.h>
  31 # include <openssl/crypto.h>
  32 # include <openssl/err.h>
  33 # include <openssl/ssl.h>
  34 # include <openssl/evp.h>
  35 # include <openssl/bn.h>
  36 # include <openssl/x509v3.h>
  37 # include <openssl/rand.h>
  38
  39 #ifndef HAVE_FORK
  40 # if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS)
  41 #  define HAVE_FORK 0
  42 # else
  43 #  define HAVE_FORK 1
  44 # endif
  45 #endif
  46
  47 #if HAVE_FORK
  48 # undef NO_FORK
  49 #else
  50 # define NO_FORK
  51 #endif
  52
  53 # if !defined(NO_FORK) && !defined(OPENSSL_NO_SOCK) \
  54      && !defined(OPENSSL_NO_POSIX_IO)
  55 #  define OCSP_DAEMON
  56 #  include <sys/types.h>
  57 #  include <sys/wait.h>
  58 #  include <syslog.h>
  59 #  include <signal.h>
  60 #  define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
  61 # else
  62 #  undef LOG_INFO
  63 #  undef LOG_WARNING
  64 #  undef LOG_ERR
  65 #  define LOG_INFO      0
  66 #  define LOG_WARNING   1
  67 #  define LOG_ERR       2
  68 # endif
  69
  70 # if defined(OPENSSL_SYS_VXWORKS)
  71 /* not supported */
  72 int setpgid(pid_t pid, pid_t pgid)
  73 {
  74     errno = ENOSYS;
  75     return 0;
  76 }
  77 /* not supported */
  78 pid_t fork(void)
  79 {
  80     errno = ENOSYS;
  81     return (pid_t) -1;
  82 }
  83 # endif
  84 /* Maximum leeway in validity period: default 5 minutes */
  85 # define MAX_VALIDITY_PERIOD    (5 * 60)
  86
  87 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
  88                          const EVP_MD *cert_id_md, X509 *issuer,
  89                          STACK_OF(OCSP_CERTID) *ids);
  90 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
  91                            const EVP_MD *cert_id_md, X509 *issuer,
  92                            STACK_OF(OCSP_CERTID) *ids);
  93 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
  94                               STACK_OF(OPENSSL_STRING) *names,
  95                               STACK_OF(OCSP_CERTID) *ids, long nsec,
  96                               long maxage);
  97 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
  98                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
  99                               EVP_PKEY *rkey, const EVP_MD *md,
 100                               STACK_OF(OPENSSL_STRING) *sigopts,
 101                               STACK_OF(X509) *rother, unsigned long flags,
 102                               int nmin, int ndays, int badsig,
 103                               const EVP_MD *resp_md);
 104
 105 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 106 static BIO *init_responder(const char *port);
 107 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, int timeout);
 108 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 109 static void log_message(int level, const char *fmt, ...);
 110 static char *prog;
 111 static int multi = 0;
 112
 113 # ifdef OCSP_DAEMON
 114 static int acfd = (int) INVALID_SOCKET;
 115 static int index_changed(CA_DB *);
 116 static void spawn_loop(void);
 117 static int print_syslog(const char *str, size_t len, void *levPtr);
 118 static void sock_timeout(int signum);
 119 # endif
 120
 121 # ifndef OPENSSL_NO_SOCK
 122 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
 123                                       const char *path,
 124                                       const STACK_OF(CONF_VALUE) *headers,
 125                                       OCSP_REQUEST *req, int req_timeout);
 126 # endif
 127
 128 typedef enum OPTION_choice {
 129     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 130     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 131     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 132     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 133     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 134     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 135     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 136     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 137     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE,
 138     OPT_NOCAPATH, OPT_NOCASTORE,
 139     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 140     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 141     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 142     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
 143     OPT_RCID,
 144     OPT_V_ENUM,
 145     OPT_MD,
 146     OPT_MULTI
 147 } OPTION_CHOICE;
 148
 149 const OPTIONS ocsp_options[] = {
 150     OPT_SECTION("General"),
 151     {"help", OPT_HELP, '-', "Display this summary"},
 152     {"ignore_err", OPT_IGNORE_ERR, '-',
 153      "Ignore error on OCSP request or response and continue running"},
 154     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 155     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 156     {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
 157     {"no-CAfile", OPT_NOCAFILE, '-',
 158      "Do not load the default certificates file"},
 159     {"no-CApath", OPT_NOCAPATH, '-',
 160      "Do not load certificates from the default certificates directory"},
 161     {"no-CAstore", OPT_NOCAPATH, '-',
 162      "Do not load certificates from the default certificates store"},
 163
 164     OPT_SECTION("Responder"),
 165     {"timeout", OPT_TIMEOUT, 'p',
 166      "Connection timeout (in seconds) to the OCSP responder"},
 167     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 168      "Don't include any certificates in response"},
 169 # ifdef OCSP_DAEMON
 170     {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
 171 # endif
 172     {"no_certs", OPT_NO_CERTS, '-',
 173      "Don't include any certificates in signed request"},
 174     {"badsig", OPT_BADSIG, '-',
 175         "Corrupt last byte of loaded OSCP response signature (for test)"},
 176     {"CA", OPT_CA, '<', "CA certificate"},
 177     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 178     {"nrequest", OPT_REQUEST, 'p',
 179      "Number of requests to accept (default unlimited)"},
 180     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 181     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 182     {"sign_other", OPT_SIGN_OTHER, '<',
 183      "Additional certificates to include in signed request"},
 184     {"index", OPT_INDEX, '<', "Certificate status index file"},
 185     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 186     {"rsigner", OPT_RSIGNER, '<',
 187      "Responder certificate to sign responses with"},
 188     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 189     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 190     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
 191     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
 192     {"header", OPT_HEADER, 's', "key=value header to add"},
 193     {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
 194     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
 195
 196     OPT_SECTION("Client"),
 197     {"url", OPT_URL, 's', "Responder URL"},
 198     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
 199     {"port", OPT_PORT, 'p', "Port to run responder on"},
 200     {"out", OPT_OUTFILE, '>', "Output filename"},
 201     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 202     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 203     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 204     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 205      "Don't check signature on response"},
 206     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 207      "Identify response by signing certificate key ID"},
 208     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 209      "Don't check signing certificate"},
 210     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 211     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 212     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 213     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 214     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 215      "Don't do additional checks on signing certificate"},
 216     {"no_explicit", OPT_NO_EXPLICIT, '-',
 217      "Do not explicitly check the chain, just verify the root"},
 218     {"trust_other", OPT_TRUST_OTHER, '-',
 219      "Don't verify additional certificates"},
 220     {"no_intern", OPT_NO_INTERN, '-',
 221      "Don't search certificates contained in response for signer"},
 222     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 223     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 224     {"verify_other", OPT_VERIFY_OTHER, '<',
 225      "Additional certificates to search for signer"},
 226     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 227     {"cert", OPT_CERT, '<', "Certificate to check"},
 228     {"serial", OPT_SERIAL, 's', "Serial number to check"},
 229     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 230      "Maximum validity discrepancy in seconds"},
 231     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 232     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 233     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 234     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 235     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 236
 237     OPT_V_OPTIONS,
 238     {NULL}
 239 };
 240
 241 int ocsp_main(int argc, char **argv)
 242 {
 243     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 244     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 245     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
 246     int trailing_md = 0;
 247     CA_DB *rdb = NULL;
 248     EVP_PKEY *key = NULL, *rkey = NULL;
 249     OCSP_BASICRESP *bs = NULL;
 250     OCSP_REQUEST *req = NULL;
 251     OCSP_RESPONSE *resp = NULL;
 252     STACK_OF(CONF_VALUE) *headers = NULL;
 253     STACK_OF(OCSP_CERTID) *ids = NULL;
 254     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 255     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 256     STACK_OF(X509) *issuers = NULL;
 257     X509 *issuer = NULL, *cert = NULL;
 258     STACK_OF(X509) *rca_cert = NULL;
 259     const EVP_MD *resp_certid_md = NULL;
 260     X509 *signer = NULL, *rsigner = NULL;
 261     X509_STORE *store = NULL;
 262     X509_VERIFY_PARAM *vpm = NULL;
 263     const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
 264     char *header, *value;
 265     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 266     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 267     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 268     char *rsignfile = NULL, *rkeyfile = NULL;
 269     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 270     char *signfile = NULL, *keyfile = NULL;
 271     char *thost = NULL, *tport = NULL, *tpath = NULL;
 272     int noCAfile = 0, noCApath = 0, noCAstore = 0;
 273     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 274     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 275     int req_text = 0, resp_text = 0, ret = 1;
 276     int req_timeout = -1;
 277     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 278     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 279     OPTION_CHOICE o;
 280
 281     reqnames = sk_OPENSSL_STRING_new_null();
 282     if (reqnames == NULL)
 283         goto end;
 284     ids = sk_OCSP_CERTID_new_null();
 285     if (ids == NULL)
 286         goto end;
 287     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 288         return 1;
 289
 290     prog = opt_init(argc, argv, ocsp_options);
 291     while ((o = opt_next()) != OPT_EOF) {
 292         switch (o) {
 293         case OPT_EOF:
 294         case OPT_ERR:
 295  opthelp:
 296             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 297             goto end;
 298         case OPT_HELP:
 299             ret = 0;
 300             opt_help(ocsp_options);
 301             goto end;
 302         case OPT_OUTFILE:
 303             outfile = opt_arg();
 304             break;
 305         case OPT_TIMEOUT:
 306 #ifndef OPENSSL_NO_SOCK
 307             req_timeout = atoi(opt_arg());
 308 #endif
 309             break;
 310         case OPT_URL:
 311             OPENSSL_free(thost);
 312             OPENSSL_free(tport);
 313             OPENSSL_free(tpath);
 314             thost = tport = tpath = NULL;
 315             if (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
 316                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 317                 goto end;
 318             }
 319             thost = host;
 320             tport = port;
 321             tpath = path;
 322             break;
 323         case OPT_HOST:
 324             host = opt_arg();
 325             break;
 326         case OPT_PORT:
 327             port = opt_arg();
 328             break;
 329         case OPT_IGNORE_ERR:
 330             ignore_err = 1;
 331             break;
 332         case OPT_NOVERIFY:
 333             noverify = 1;
 334             break;
 335         case OPT_NONCE:
 336             add_nonce = 2;
 337             break;
 338         case OPT_NO_NONCE:
 339             add_nonce = 0;
 340             break;
 341         case OPT_RESP_NO_CERTS:
 342             rflags |= OCSP_NOCERTS;
 343             break;
 344         case OPT_RESP_KEY_ID:
 345             rflags |= OCSP_RESPID_KEY;
 346             break;
 347         case OPT_NO_CERTS:
 348             sign_flags |= OCSP_NOCERTS;
 349             break;
 350         case OPT_NO_SIGNATURE_VERIFY:
 351             verify_flags |= OCSP_NOSIGS;
 352             break;
 353         case OPT_NO_CERT_VERIFY:
 354             verify_flags |= OCSP_NOVERIFY;
 355             break;
 356         case OPT_NO_CHAIN:
 357             verify_flags |= OCSP_NOCHAIN;
 358             break;
 359         case OPT_NO_CERT_CHECKS:
 360             verify_flags |= OCSP_NOCHECKS;
 361             break;
 362         case OPT_NO_EXPLICIT:
 363             verify_flags |= OCSP_NOEXPLICIT;
 364             break;
 365         case OPT_TRUST_OTHER:
 366             verify_flags |= OCSP_TRUSTOTHER;
 367             break;
 368         case OPT_NO_INTERN:
 369             verify_flags |= OCSP_NOINTERN;
 370             break;
 371         case OPT_BADSIG:
 372             badsig = 1;
 373             break;
 374         case OPT_TEXT:
 375             req_text = resp_text = 1;
 376             break;
 377         case OPT_REQ_TEXT:
 378             req_text = 1;
 379             break;
 380         case OPT_RESP_TEXT:
 381             resp_text = 1;
 382             break;
 383         case OPT_REQIN:
 384             reqin = opt_arg();
 385             break;
 386         case OPT_RESPIN:
 387             respin = opt_arg();
 388             break;
 389         case OPT_SIGNER:
 390             signfile = opt_arg();
 391             break;
 392         case OPT_VAFILE:
 393             verify_certfile = opt_arg();
 394             verify_flags |= OCSP_TRUSTOTHER;
 395             break;
 396         case OPT_SIGN_OTHER:
 397             sign_certfile = opt_arg();
 398             break;
 399         case OPT_VERIFY_OTHER:
 400             verify_certfile = opt_arg();
 401             break;
 402         case OPT_CAFILE:
 403             CAfile = opt_arg();
 404             break;
 405         case OPT_CAPATH:
 406             CApath = opt_arg();
 407             break;
 408         case OPT_CASTORE:
 409             CAstore = opt_arg();
 410             break;
 411         case OPT_NOCAFILE:
 412             noCAfile = 1;
 413             break;
 414         case OPT_NOCAPATH:
 415             noCApath = 1;
 416             break;
 417         case OPT_NOCASTORE:
 418             noCAstore = 1;
 419             break;
 420         case OPT_V_CASES:
 421             if (!opt_verify(o, vpm))
 422                 goto end;
 423             vpmtouched++;
 424             break;
 425         case OPT_VALIDITY_PERIOD:
 426             opt_long(opt_arg(), &nsec);
 427             break;
 428         case OPT_STATUS_AGE:
 429             opt_long(opt_arg(), &maxage);
 430             break;
 431         case OPT_SIGNKEY:
 432             keyfile = opt_arg();
 433             break;
 434         case OPT_REQOUT:
 435             reqout = opt_arg();
 436             break;
 437         case OPT_RESPOUT:
 438             respout = opt_arg();
 439             break;
 440         case OPT_PATH:
 441             path = opt_arg();
 442             break;
 443         case OPT_ISSUER:
 444             issuer = load_cert(opt_arg(), FORMAT_PEM, "issuer certificate");
 445             if (issuer == NULL)
 446                 goto end;
 447             if (issuers == NULL) {
 448                 if ((issuers = sk_X509_new_null()) == NULL)
 449                     goto end;
 450             }
 451             sk_X509_push(issuers, issuer);
 452             break;
 453         case OPT_CERT:
 454             X509_free(cert);
 455             cert = load_cert(opt_arg(), FORMAT_PEM, "certificate");
 456             if (cert == NULL)
 457                 goto end;
 458             if (cert_id_md == NULL)
 459                 cert_id_md = EVP_sha1();
 460             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 461                 goto end;
 462             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 463                 goto end;
 464             trailing_md = 0;
 465             break;
 466         case OPT_SERIAL:
 467             if (cert_id_md == NULL)
 468                 cert_id_md = EVP_sha1();
 469             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 470                 goto end;
 471             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 472                 goto end;
 473             trailing_md = 0;
 474             break;
 475         case OPT_INDEX:
 476             ridx_filename = opt_arg();
 477             break;
 478         case OPT_CA:
 479             rca_filename = opt_arg();
 480             break;
 481         case OPT_NMIN:
 482             opt_int(opt_arg(), &nmin);
 483             if (ndays == -1)
 484                 ndays = 0;
 485             break;
 486         case OPT_REQUEST:
 487             opt_int(opt_arg(), &accept_count);
 488             break;
 489         case OPT_NDAYS:
 490             ndays = atoi(opt_arg());
 491             break;
 492         case OPT_RSIGNER:
 493             rsignfile = opt_arg();
 494             break;
 495         case OPT_RKEY:
 496             rkeyfile = opt_arg();
 497             break;
 498         case OPT_ROTHER:
 499             rcertfile = opt_arg();
 500             break;
 501         case OPT_RMD:   /* Response MessageDigest */
 502             if (!opt_md(opt_arg(), &rsign_md))
 503                 goto end;
 504             break;
 505         case OPT_RSIGOPT:
 506             if (rsign_sigopts == NULL)
 507                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
 508             if (rsign_sigopts == NULL || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
 509                 goto end;
 510             break;
 511         case OPT_HEADER:
 512             header = opt_arg();
 513             value = strchr(header, '=');
 514             if (value == NULL) {
 515                 BIO_printf(bio_err, "Missing = in header key=value\n");
 516                 goto opthelp;
 517             }
 518             *value++ = '\0';
 519             if (!X509V3_add_value(header, value, &headers))
 520                 goto end;
 521             break;
 522         case OPT_RCID:
 523             resp_certid_md = EVP_get_digestbyname(opt_arg());
 524             if (resp_certid_md == NULL)
 525                 goto opthelp;
 526             break;
 527         case OPT_MD:
 528             if (trailing_md) {
 529                 BIO_printf(bio_err,
 530                            "%s: Digest must be before -cert or -serial\n",
 531                            prog);
 532                 goto opthelp;
 533             }
 534             if (!opt_md(opt_unknown(), &cert_id_md))
 535                 goto opthelp;
 536             trailing_md = 1;
 537             break;
 538         case OPT_MULTI:
 539 # ifdef OCSP_DAEMON
 540             multi = atoi(opt_arg());
 541 # endif
 542             break;
 543         }
 544     }
 545     if (trailing_md) {
 546         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
 547                    prog);
 548         goto opthelp;
 549     }
 550     argc = opt_num_rest();
 551     if (argc != 0)
 552         goto opthelp;
 553
 554     /* Have we anything to do? */
 555     if (req == NULL && reqin == NULL
 556         && respin == NULL && !(port != NULL && ridx_filename != NULL))
 557         goto opthelp;
 558
 559     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 560     if (out == NULL)
 561         goto end;
 562
 563     if (req == NULL && (add_nonce != 2))
 564         add_nonce = 0;
 565
 566     if (req == NULL && reqin != NULL) {
 567         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 568         if (derbio == NULL)
 569             goto end;
 570         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 571         BIO_free(derbio);
 572         if (req == NULL) {
 573             BIO_printf(bio_err, "Error reading OCSP request\n");
 574             goto end;
 575         }
 576     }
 577
 578     if (req == NULL && port != NULL) {
 579         acbio = init_responder(port);
 580         if (acbio == NULL)
 581             goto end;
 582     }
 583
 584     if (rsignfile != NULL) {
 585         if (rkeyfile == NULL)
 586             rkeyfile = rsignfile;
 587         rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
 588         if (rsigner == NULL) {
 589             BIO_printf(bio_err, "Error loading responder certificate\n");
 590             goto end;
 591         }
 592         if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
 593                         NULL, "CA certificate"))
 594             goto end;
 595         if (rcertfile != NULL) {
 596             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
 597                             "responder other certificates"))
 598                 goto end;
 599         }
 600         rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 601                         "responder private key");
 602         if (rkey == NULL)
 603             goto end;
 604     }
 605
 606     if (ridx_filename != NULL
 607         && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
 608         BIO_printf(bio_err,
 609                    "Responder mode requires certificate, key, and CA.\n");
 610         goto end;
 611     }
 612
 613     if (ridx_filename != NULL) {
 614         rdb = load_index(ridx_filename, NULL);
 615         if (rdb == NULL || index_index(rdb) <= 0) {
 616             ret = 1;
 617             goto end;
 618         }
 619     }
 620
 621 # ifdef OCSP_DAEMON
 622     if (multi && acbio != NULL)
 623         spawn_loop();
 624     if (acbio != NULL && req_timeout > 0)
 625         signal(SIGALRM, sock_timeout);
 626 #endif
 627
 628     if (acbio != NULL)
 629         log_message(LOG_INFO, "waiting for OCSP client connections...");
 630
 631 redo_accept:
 632
 633     if (acbio != NULL) {
 634 # ifdef OCSP_DAEMON
 635         if (index_changed(rdb)) {
 636             CA_DB *newrdb = load_index(ridx_filename, NULL);
 637
 638             if (newrdb != NULL && index_index(newrdb) > 0) {
 639                 free_index(rdb);
 640                 rdb = newrdb;
 641             } else {
 642                 free_index(newrdb);
 643                 log_message(LOG_ERR, "error reloading updated index: %s",
 644                             ridx_filename);
 645             }
 646         }
 647 # endif
 648
 649         req = NULL;
 650         if (!do_responder(&req, &cbio, acbio, req_timeout))
 651             goto redo_accept;
 652
 653         if (req == NULL) {
 654             resp =
 655                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 656                                      NULL);
 657             send_ocsp_response(cbio, resp);
 658             goto done_resp;
 659         }
 660     }
 661
 662     if (req == NULL
 663         && (signfile != NULL || reqout != NULL
 664             || host != NULL || add_nonce || ridx_filename != NULL)) {
 665         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 666         goto end;
 667     }
 668
 669     if (req != NULL && add_nonce) {
 670         if (!OCSP_request_add1_nonce(req, NULL, -1))
 671             goto end;
 672     }
 673
 674     if (signfile != NULL) {
 675         if (keyfile == NULL)
 676             keyfile = signfile;
 677         signer = load_cert(signfile, FORMAT_PEM, "signer certificate");
 678         if (signer == NULL) {
 679             BIO_printf(bio_err, "Error loading signer certificate\n");
 680             goto end;
 681         }
 682         if (sign_certfile != NULL) {
 683             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL,
 684                             "signer certificates"))
 685                 goto end;
 686         }
 687         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 688                        "signer private key");
 689         if (key == NULL)
 690             goto end;
 691
 692         if (!OCSP_request_sign
 693             (req, signer, key, NULL, sign_other, sign_flags)) {
 694             BIO_printf(bio_err, "Error signing OCSP request\n");
 695             goto end;
 696         }
 697     }
 698
 699     if (req_text && req != NULL)
 700         OCSP_REQUEST_print(out, req, 0);
 701
 702     if (reqout != NULL) {
 703         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 704         if (derbio == NULL)
 705             goto end;
 706         i2d_OCSP_REQUEST_bio(derbio, req);
 707         BIO_free(derbio);
 708     }
 709
 710     if (rdb != NULL) {
 711         make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
 712                            rsign_md, rsign_sigopts, rother, rflags, nmin, ndays, badsig,
 713                            resp_certid_md);
 714         if (cbio != NULL)
 715             send_ocsp_response(cbio, resp);
 716     } else if (host != NULL) {
 717 # ifndef OPENSSL_NO_SOCK
 718         resp = process_responder(req, host, path,
 719                                  port, use_ssl, headers, req_timeout);
 720         if (resp == NULL)
 721             goto end;
 722 # else
 723         BIO_printf(bio_err,
 724                    "Error creating connect BIO - sockets not supported.\n");
 725         goto end;
 726 # endif
 727     } else if (respin != NULL) {
 728         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 729         if (derbio == NULL)
 730             goto end;
 731         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 732         BIO_free(derbio);
 733         if (resp == NULL) {
 734             BIO_printf(bio_err, "Error reading OCSP response\n");
 735             goto end;
 736         }
 737     } else {
 738         ret = 0;
 739         goto end;
 740     }
 741
 742  done_resp:
 743
 744     if (respout != NULL) {
 745         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 746         if (derbio == NULL)
 747             goto end;
 748         i2d_OCSP_RESPONSE_bio(derbio, resp);
 749         BIO_free(derbio);
 750     }
 751
 752     i = OCSP_response_status(resp);
 753     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 754         BIO_printf(out, "Responder Error: %s (%d)\n",
 755                    OCSP_response_status_str(i), i);
 756         if (!ignore_err)
 757                 goto end;
 758     }
 759
 760     if (resp_text)
 761         OCSP_RESPONSE_print(out, resp, 0);
 762
 763     /* If running as responder don't verify our own response */
 764     if (cbio != NULL) {
 765         /* If not unlimited, see if we took all we should. */
 766         if (accept_count != -1 && --accept_count <= 0) {
 767             ret = 0;
 768             goto end;
 769         }
 770         BIO_free_all(cbio);
 771         cbio = NULL;
 772         OCSP_REQUEST_free(req);
 773         req = NULL;
 774         OCSP_RESPONSE_free(resp);
 775         resp = NULL;
 776         goto redo_accept;
 777     }
 778     if (ridx_filename != NULL) {
 779         ret = 0;
 780         goto end;
 781     }
 782
 783     if (store == NULL) {
 784         store = setup_verify(CAfile, noCAfile, CApath, noCApath,
 785                              CAstore, noCAstore);
 786         if (!store)
 787             goto end;
 788     }
 789     if (vpmtouched)
 790         X509_STORE_set1_param(store, vpm);
 791     if (verify_certfile != NULL) {
 792         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
 793                         "validator certificate"))
 794             goto end;
 795     }
 796
 797     bs = OCSP_response_get1_basic(resp);
 798     if (bs == NULL) {
 799         BIO_printf(bio_err, "Error parsing response\n");
 800         goto end;
 801     }
 802
 803     ret = 0;
 804
 805     if (!noverify) {
 806         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 807             if (i == -1)
 808                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 809             else {
 810                 BIO_printf(bio_err, "Nonce Verify error\n");
 811                 ret = 1;
 812                 goto end;
 813             }
 814         }
 815
 816         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 817         if (i <= 0 && issuers) {
 818             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 819             if (i > 0)
 820                 ERR_clear_error();
 821         }
 822         if (i <= 0) {
 823             BIO_printf(bio_err, "Response Verify Failure\n");
 824             ERR_print_errors(bio_err);
 825             ret = 1;
 826         } else {
 827             BIO_printf(bio_err, "Response verify OK\n");
 828         }
 829     }
 830
 831     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 832
 833  end:
 834     ERR_print_errors(bio_err);
 835     X509_free(signer);
 836     X509_STORE_free(store);
 837     X509_VERIFY_PARAM_free(vpm);
 838     sk_OPENSSL_STRING_free(rsign_sigopts);
 839     EVP_PKEY_free(key);
 840     EVP_PKEY_free(rkey);
 841     X509_free(cert);
 842     sk_X509_pop_free(issuers, X509_free);
 843     X509_free(rsigner);
 844     sk_X509_pop_free(rca_cert, X509_free);
 845     free_index(rdb);
 846     BIO_free_all(cbio);
 847     BIO_free_all(acbio);
 848     BIO_free_all(out);
 849     OCSP_REQUEST_free(req);
 850     OCSP_RESPONSE_free(resp);
 851     OCSP_BASICRESP_free(bs);
 852     sk_OPENSSL_STRING_free(reqnames);
 853     sk_OCSP_CERTID_free(ids);
 854     sk_X509_pop_free(sign_other, X509_free);
 855     sk_X509_pop_free(verify_other, X509_free);
 856     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 857     OPENSSL_free(thost);
 858     OPENSSL_free(tport);
 859     OPENSSL_free(tpath);
 860
 861     return ret;
 862 }
 863
 864 static void
 865 log_message(int level, const char *fmt, ...)
 866 {
 867     va_list ap;
 868
 869     va_start(ap, fmt);
 870 # ifdef OCSP_DAEMON
 871     if (multi) {
 872         char buf[1024];
 873         if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
 874             syslog(level, "%s", buf);
 875         }
 876         if (level >= LOG_ERR)
 877             ERR_print_errors_cb(print_syslog, &level);
 878     }
 879 # endif
 880     if (!multi) {
 881         BIO_printf(bio_err, "%s: ", prog);
 882         BIO_vprintf(bio_err, fmt, ap);
 883         BIO_printf(bio_err, "\n");
 884     }
 885     va_end(ap);
 886 }
 887
 888 # ifdef OCSP_DAEMON
 889
 890 static int print_syslog(const char *str, size_t len, void *levPtr)
 891 {
 892     int level = *(int *)levPtr;
 893     int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
 894
 895     syslog(level, "%.*s", ilen, str);
 896
 897     return ilen;
 898 }
 899
 900 static int index_changed(CA_DB *rdb)
 901 {
 902     struct stat sb;
 903
 904     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
 905         if (rdb->dbst.st_mtime != sb.st_mtime
 906             || rdb->dbst.st_ctime != sb.st_ctime
 907             || rdb->dbst.st_ino != sb.st_ino
 908             || rdb->dbst.st_dev != sb.st_dev) {
 909             syslog(LOG_INFO, "index file changed, reloading");
 910             return 1;
 911         }
 912     }
 913     return 0;
 914 }
 915
 916 static void killall(int ret, pid_t *kidpids)
 917 {
 918     int i;
 919
 920     for (i = 0; i < multi; ++i)
 921         if (kidpids[i] != 0)
 922             (void)kill(kidpids[i], SIGTERM);
 923     OPENSSL_free(kidpids);
 924     sleep(1);
 925     exit(ret);
 926 }
 927
 928 static int termsig = 0;
 929
 930 static void noteterm (int sig)
 931 {
 932     termsig = sig;
 933 }
 934
 935 /*
 936  * Loop spawning up to `multi` child processes, only child processes return
 937  * from this function.  The parent process loops until receiving a termination
 938  * signal, kills extant children and exits without returning.
 939  */
 940 static void spawn_loop(void)
 941 {
 942     pid_t *kidpids = NULL;
 943     int status;
 944     int procs = 0;
 945     int i;
 946
 947     openlog(prog, LOG_PID, LOG_DAEMON);
 948
 949     if (setpgid(0, 0)) {
 950         syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
 951                strerror(errno));
 952         exit(1);
 953     }
 954     kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
 955     for (i = 0; i < multi; ++i)
 956         kidpids[i] = 0;
 957
 958     signal(SIGINT, noteterm);
 959     signal(SIGTERM, noteterm);
 960
 961     while (termsig == 0) {
 962         pid_t fpid;
 963
 964         /*
 965          * Wait for a child to replace when we're at the limit.
 966          * Slow down if a child exited abnormally or waitpid() < 0
 967          */
 968         while (termsig == 0 && procs >= multi) {
 969             if ((fpid = waitpid(-1, &status, 0)) > 0) {
 970                 for (i = 0; i < procs; ++i) {
 971                     if (kidpids[i] == fpid) {
 972                         kidpids[i] = 0;
 973                         --procs;
 974                         break;
 975                     }
 976                 }
 977                 if (i >= multi) {
 978                     syslog(LOG_ERR, "fatal: internal error: "
 979                            "no matching child slot for pid: %ld",
 980                            (long) fpid);
 981                     killall(1, kidpids);
 982                 }
 983                 if (status != 0) {
 984                     if (WIFEXITED(status))
 985                         syslog(LOG_WARNING, "child process: %ld, exit status: %d",
 986                                (long)fpid, WEXITSTATUS(status));
 987                     else if (WIFSIGNALED(status))
 988                         syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
 989                                (long)fpid, WTERMSIG(status),
 990 #ifdef WCOREDUMP
 991                                WCOREDUMP(status) ? " (core dumped)" :
 992 #endif
 993                                "");
 994                     sleep(1);
 995                 }
 996                 break;
 997             } else if (errno != EINTR) {
 998                 syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
 999                 killall(1, kidpids);
1000             }
1001         }
1002         if (termsig)
1003             break;
1004
1005         switch(fpid = fork()) {
1006         case -1:            /* error */
1007             /* System critically low on memory, pause and try again later */
1008             sleep(30);
1009             break;
1010         case 0:             /* child */
1011             OPENSSL_free(kidpids);
1012             signal(SIGINT, SIG_DFL);
1013             signal(SIGTERM, SIG_DFL);
1014             if (termsig)
1015                 _exit(0);
1016             if (RAND_poll() <= 0) {
1017                 syslog(LOG_ERR, "fatal: RAND_poll() failed");
1018                 _exit(1);
1019             }
1020             return;
1021         default:            /* parent */
1022             for (i = 0; i < multi; ++i) {
1023                 if (kidpids[i] == 0) {
1024                     kidpids[i] = fpid;
1025                     procs++;
1026                     break;
1027                 }
1028             }
1029             if (i >= multi) {
1030                 syslog(LOG_ERR, "fatal: internal error: no free child slots");
1031                 killall(1, kidpids);
1032             }
1033             break;
1034         }
1035     }
1036
1037     /* The loop above can only break on termsig */
1038     syslog(LOG_INFO, "terminating on signal: %d", termsig);
1039     killall(0, kidpids);
1040 }
1041 # endif
1042
1043 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
1044                          const EVP_MD *cert_id_md, X509 *issuer,
1045                          STACK_OF(OCSP_CERTID) *ids)
1046 {
1047     OCSP_CERTID *id;
1048
1049     if (issuer == NULL) {
1050         BIO_printf(bio_err, "No issuer certificate specified\n");
1051         return 0;
1052     }
1053     if (*req == NULL)
1054         *req = OCSP_REQUEST_new();
1055     if (*req == NULL)
1056         goto err;
1057     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
1058     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1059         goto err;
1060     if (!OCSP_request_add0_id(*req, id))
1061         goto err;
1062     return 1;
1063
1064  err:
1065     BIO_printf(bio_err, "Error Creating OCSP request\n");
1066     return 0;
1067 }
1068
1069 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
1070                            const EVP_MD *cert_id_md, X509 *issuer,
1071                            STACK_OF(OCSP_CERTID) *ids)
1072 {
1073     OCSP_CERTID *id;
1074     X509_NAME *iname;
1075     ASN1_BIT_STRING *ikey;
1076     ASN1_INTEGER *sno;
1077
1078     if (issuer == NULL) {
1079         BIO_printf(bio_err, "No issuer certificate specified\n");
1080         return 0;
1081     }
1082     if (*req == NULL)
1083         *req = OCSP_REQUEST_new();
1084     if (*req == NULL)
1085         goto err;
1086     iname = X509_get_subject_name(issuer);
1087     ikey = X509_get0_pubkey_bitstr(issuer);
1088     sno = s2i_ASN1_INTEGER(NULL, serial);
1089     if (sno == NULL) {
1090         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
1091         return 0;
1092     }
1093     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
1094     ASN1_INTEGER_free(sno);
1095     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1096         goto err;
1097     if (!OCSP_request_add0_id(*req, id))
1098         goto err;
1099     return 1;
1100
1101  err:
1102     BIO_printf(bio_err, "Error Creating OCSP request\n");
1103     return 0;
1104 }
1105
1106 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
1107                               STACK_OF(OPENSSL_STRING) *names,
1108                               STACK_OF(OCSP_CERTID) *ids, long nsec,
1109                               long maxage)
1110 {
1111     OCSP_CERTID *id;
1112     const char *name;
1113     int i, status, reason;
1114     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1115
1116     if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
1117         || !sk_OCSP_CERTID_num(ids))
1118         return;
1119
1120     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
1121         id = sk_OCSP_CERTID_value(ids, i);
1122         name = sk_OPENSSL_STRING_value(names, i);
1123         BIO_printf(out, "%s: ", name);
1124
1125         if (!OCSP_resp_find_status(bs, id, &status, &reason,
1126                                    &rev, &thisupd, &nextupd)) {
1127             BIO_puts(out, "ERROR: No Status found.\n");
1128             continue;
1129         }
1130
1131         /*
1132          * Check validity: if invalid write to output BIO so we know which
1133          * response this refers to.
1134          */
1135         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1136             BIO_puts(out, "WARNING: Status times invalid.\n");
1137             ERR_print_errors(out);
1138         }
1139         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1140
1141         BIO_puts(out, "\tThis Update: ");
1142         ASN1_GENERALIZEDTIME_print(out, thisupd);
1143         BIO_puts(out, "\n");
1144
1145         if (nextupd) {
1146             BIO_puts(out, "\tNext Update: ");
1147             ASN1_GENERALIZEDTIME_print(out, nextupd);
1148             BIO_puts(out, "\n");
1149         }
1150
1151         if (status != V_OCSP_CERTSTATUS_REVOKED)
1152             continue;
1153
1154         if (reason != -1)
1155             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1156
1157         BIO_puts(out, "\tRevocation Time: ");
1158         ASN1_GENERALIZEDTIME_print(out, rev);
1159         BIO_puts(out, "\n");
1160     }
1161 }
1162
1163 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1164                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1165                               EVP_PKEY *rkey, const EVP_MD *rmd,
1166                               STACK_OF(OPENSSL_STRING) *sigopts,
1167                               STACK_OF(X509) *rother, unsigned long flags,
1168                               int nmin, int ndays, int badsig,
1169                               const EVP_MD *resp_md)
1170 {
1171     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1172     OCSP_CERTID *cid;
1173     OCSP_BASICRESP *bs = NULL;
1174     int i, id_count;
1175     EVP_MD_CTX *mctx = NULL;
1176     EVP_PKEY_CTX *pkctx = NULL;
1177
1178     id_count = OCSP_request_onereq_count(req);
1179
1180     if (id_count <= 0) {
1181         *resp =
1182             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1183         goto end;
1184     }
1185
1186     bs = OCSP_BASICRESP_new();
1187     thisupd = X509_gmtime_adj(NULL, 0);
1188     if (ndays != -1)
1189         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1190
1191     /* Examine each certificate id in the request */
1192     for (i = 0; i < id_count; i++) {
1193         OCSP_ONEREQ *one;
1194         ASN1_INTEGER *serial;
1195         char **inf;
1196         int jj;
1197         int found = 0;
1198         ASN1_OBJECT *cert_id_md_oid;
1199         const EVP_MD *cert_id_md;
1200         OCSP_CERTID *cid_resp_md = NULL;
1201
1202         one = OCSP_request_onereq_get0(req, i);
1203         cid = OCSP_onereq_get0_id(one);
1204
1205         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1206
1207         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1208         if (cert_id_md == NULL) {
1209             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1210                                          NULL);
1211             goto end;
1212         }
1213         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1214             X509 *ca_cert = sk_X509_value(ca, jj);
1215             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1216
1217             if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
1218                 found = 1;
1219                 if (resp_md != NULL)
1220                     cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
1221             }
1222             OCSP_CERTID_free(ca_id);
1223         }
1224         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1225         inf = lookup_serial(db, serial);
1226
1227         /* at this point, we can have cid be an alias of cid_resp_md */
1228         cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
1229
1230         if (!found) {
1231             OCSP_basic_add1_status(bs, cid,
1232                                    V_OCSP_CERTSTATUS_UNKNOWN,
1233                                    0, NULL, thisupd, nextupd);
1234             continue;
1235         }
1236         if (inf == NULL) {
1237             OCSP_basic_add1_status(bs, cid,
1238                                    V_OCSP_CERTSTATUS_UNKNOWN,
1239                                    0, NULL, thisupd, nextupd);
1240         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1241             OCSP_basic_add1_status(bs, cid,
1242                                    V_OCSP_CERTSTATUS_GOOD,
1243                                    0, NULL, thisupd, nextupd);
1244         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1245             ASN1_OBJECT *inst = NULL;
1246             ASN1_TIME *revtm = NULL;
1247             ASN1_GENERALIZEDTIME *invtm = NULL;
1248             OCSP_SINGLERESP *single;
1249             int reason = -1;
1250
1251             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1252             single = OCSP_basic_add1_status(bs, cid,
1253                                             V_OCSP_CERTSTATUS_REVOKED,
1254                                             reason, revtm, thisupd, nextupd);
1255             if (invtm != NULL)
1256                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1257                                              invtm, 0, 0);
1258             else if (inst != NULL)
1259                 OCSP_SINGLERESP_add1_ext_i2d(single,
1260                                              NID_hold_instruction_code, inst,
1261                                              0, 0);
1262             ASN1_OBJECT_free(inst);
1263             ASN1_TIME_free(revtm);
1264             ASN1_GENERALIZEDTIME_free(invtm);
1265         }
1266         OCSP_CERTID_free(cid_resp_md);
1267     }
1268
1269     OCSP_copy_nonce(bs, req);
1270
1271     mctx = EVP_MD_CTX_new();
1272     if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1273         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1274         goto end;
1275     }
1276     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1277         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1278
1279         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1280             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1281             ERR_print_errors(bio_err);
1282             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1283                                          NULL);
1284             goto end;
1285         }
1286     }
1287     if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1288         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1289         goto end;
1290     }
1291
1292     if (badsig) {
1293         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1294         corrupt_signature(sig);
1295     }
1296
1297     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1298
1299  end:
1300     EVP_MD_CTX_free(mctx);
1301     ASN1_TIME_free(thisupd);
1302     ASN1_TIME_free(nextupd);
1303     OCSP_BASICRESP_free(bs);
1304 }
1305
1306 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1307 {
1308     int i;
1309     BIGNUM *bn = NULL;
1310     char *itmp, *row[DB_NUMBER], **rrow;
1311     for (i = 0; i < DB_NUMBER; i++)
1312         row[i] = NULL;
1313     bn = ASN1_INTEGER_to_BN(ser, NULL);
1314     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1315                                  * point and abort */
1316     if (BN_is_zero(bn))
1317         itmp = OPENSSL_strdup("00");
1318     else
1319         itmp = BN_bn2hex(bn);
1320     row[DB_serial] = itmp;
1321     BN_free(bn);
1322     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1323     OPENSSL_free(itmp);
1324     return rrow;
1325 }
1326
1327 /* Quick and dirty OCSP server: read in and parse input request */
1328
1329 static BIO *init_responder(const char *port)
1330 {
1331 # ifdef OPENSSL_NO_SOCK
1332     BIO_printf(bio_err,
1333                "Error setting up accept BIO - sockets not supported.\n");
1334     return NULL;
1335 # else
1336     BIO *acbio = NULL, *bufbio = NULL;
1337
1338     bufbio = BIO_new(BIO_f_buffer());
1339     if (bufbio == NULL)
1340         goto err;
1341     acbio = BIO_new(BIO_s_accept());
1342     if (acbio == NULL
1343         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1344         || BIO_set_accept_port(acbio, port) < 0) {
1345         log_message(LOG_ERR, "Error setting up accept BIO");
1346         goto err;
1347     }
1348
1349     BIO_set_accept_bios(acbio, bufbio);
1350     bufbio = NULL;
1351     if (BIO_do_accept(acbio) <= 0) {
1352         log_message(LOG_ERR, "Error starting accept");
1353         goto err;
1354     }
1355
1356     return acbio;
1357
1358  err:
1359     BIO_free_all(acbio);
1360     BIO_free(bufbio);
1361     return NULL;
1362 # endif
1363 }
1364
1365 # ifndef OPENSSL_NO_SOCK
1366 /*
1367  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1368  */
1369 static int urldecode(char *p)
1370 {
1371     unsigned char *out = (unsigned char *)p;
1372     unsigned char *save = out;
1373
1374     for (; *p; p++) {
1375         if (*p != '%')
1376             *out++ = *p;
1377         else if (isxdigit(_UC(p[1])) && isxdigit(_UC(p[2]))) {
1378             /* Don't check, can't fail because of ixdigit() call. */
1379             *out++ = (OPENSSL_hexchar2int(p[1]) << 4)
1380                    | OPENSSL_hexchar2int(p[2]);
1381             p += 2;
1382         }
1383         else
1384             return -1;
1385     }
1386     *out = '\0';
1387     return (int)(out - save);
1388 }
1389 # endif
1390
1391 # ifdef OCSP_DAEMON
1392 static void sock_timeout(int signum)
1393 {
1394     if (acfd != (int)INVALID_SOCKET)
1395         (void)shutdown(acfd, SHUT_RD);
1396 }
1397 # endif
1398
1399 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1400                         int timeout)
1401 {
1402 # ifdef OPENSSL_NO_SOCK
1403     return 0;
1404 # else
1405     int len;
1406     OCSP_REQUEST *req = NULL;
1407     char inbuf[2048], reqbuf[2048];
1408     char *p, *q;
1409     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1410     const char *client;
1411
1412     *preq = NULL;
1413
1414     /* Connection loss before accept() is routine, ignore silently */
1415     if (BIO_do_accept(acbio) <= 0)
1416         return 0;
1417
1418     cbio = BIO_pop(acbio);
1419     *pcbio = cbio;
1420     client = BIO_get_peer_name(cbio);
1421
1422 #  ifdef OCSP_DAEMON
1423     if (timeout > 0) {
1424         (void) BIO_get_fd(cbio, &acfd);
1425         alarm(timeout);
1426     }
1427 #  endif
1428
1429     /* Read the request line. */
1430     len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
1431     if (len <= 0)
1432         goto out;
1433
1434     if (strncmp(reqbuf, "GET ", 4) == 0) {
1435         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1436         for (p = reqbuf + 4; *p == ' '; ++p)
1437             continue;
1438         if (*p != '/') {
1439             log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
1440             goto out;
1441         }
1442         p++;
1443
1444         /* Splice off the HTTP version identifier. */
1445         for (q = p; *q; q++)
1446             if (*q == ' ')
1447                 break;
1448         if (strncmp(q, " HTTP/1.", 8) != 0) {
1449             log_message(LOG_INFO,
1450                         "Invalid request -- bad HTTP version: %s", client);
1451             goto out;
1452         }
1453         *q = '\0';
1454
1455         /*
1456          * Skip "GET / HTTP..." requests often used by load-balancers.  Note:
1457          * 'p' was incremented above to point to the first byte *after* the
1458          * leading slash, so with 'GET / ' it is now an empty string.
1459          */
1460         if (p[0] == '\0')
1461             goto out;
1462
1463         len = urldecode(p);
1464         if (len <= 0) {
1465             log_message(LOG_INFO,
1466                         "Invalid request -- bad URL encoding: %s", client);
1467             goto out;
1468         }
1469         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1470             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1471             log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
1472             goto out;
1473         }
1474         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1475         getbio = BIO_push(b64, getbio);
1476     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1477         log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
1478         goto out;
1479     }
1480
1481     /* Read and skip past the headers. */
1482     for (;;) {
1483         len = BIO_gets(cbio, inbuf, sizeof(inbuf));
1484         if (len <= 0)
1485             goto out;
1486         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1487             break;
1488     }
1489
1490 #  ifdef OCSP_DAEMON
1491     /* Clear alarm before we close the client socket */
1492     alarm(0);
1493     timeout = 0;
1494 #  endif
1495
1496     /* Try to read OCSP request */
1497     if (getbio != NULL) {
1498         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1499         BIO_free_all(getbio);
1500     } else {
1501         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1502     }
1503
1504     if (req == NULL)
1505         log_message(LOG_ERR, "Error parsing OCSP request");
1506
1507     *preq = req;
1508
1509 out:
1510 #  ifdef OCSP_DAEMON
1511     if (timeout > 0)
1512         alarm(0);
1513     acfd = (int)INVALID_SOCKET;
1514 #  endif
1515     return 1;
1516 # endif
1517 }
1518
1519 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1520 {
1521     char http_resp[] =
1522         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1523         "Content-Length: %d\r\n\r\n";
1524     if (cbio == NULL)
1525         return 0;
1526     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1527     i2d_OCSP_RESPONSE_bio(cbio, resp);
1528     (void)BIO_flush(cbio);
1529     return 1;
1530 }
1531
1532 # ifndef OPENSSL_NO_SOCK
1533 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
1534                                       const char *path,
1535                                       const STACK_OF(CONF_VALUE) *headers,
1536                                       OCSP_REQUEST *req, int req_timeout)
1537 {
1538     int fd;
1539     int rv;
1540     int i;
1541     int add_host = 1;
1542     OCSP_REQ_CTX *ctx = NULL;
1543     OCSP_RESPONSE *rsp = NULL;
1544     fd_set confds;
1545     struct timeval tv;
1546
1547     if (req_timeout != -1)
1548         BIO_set_nbio(cbio, 1);
1549
1550     rv = BIO_do_connect(cbio);
1551
1552     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1553         BIO_puts(bio_err, "Error connecting BIO\n");
1554         return NULL;
1555     }
1556
1557     if (BIO_get_fd(cbio, &fd) < 0) {
1558         BIO_puts(bio_err, "Can't get connection fd\n");
1559         goto err;
1560     }
1561
1562     if (req_timeout != -1 && rv <= 0) {
1563         FD_ZERO(&confds);
1564         openssl_fdset(fd, &confds);
1565         tv.tv_usec = 0;
1566         tv.tv_sec = req_timeout;
1567         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1568         if (rv == 0) {
1569             BIO_puts(bio_err, "Timeout on connect\n");
1570             return NULL;
1571         }
1572     }
1573
1574     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1575     if (ctx == NULL)
1576         return NULL;
1577
1578     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1579         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1580         if (add_host == 1 && strcasecmp("host", hdr->name) == 0)
1581             add_host = 0;
1582         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1583             goto err;
1584     }
1585
1586     if (add_host == 1 && OCSP_REQ_CTX_add1_header(ctx, "Host", host) == 0)
1587         goto err;
1588
1589     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1590         goto err;
1591
1592     for (;;) {
1593         rv = OCSP_sendreq_nbio(&rsp, ctx);
1594         if (rv != -1)
1595             break;
1596         if (req_timeout == -1)
1597             continue;
1598         FD_ZERO(&confds);
1599         openssl_fdset(fd, &confds);
1600         tv.tv_usec = 0;
1601         tv.tv_sec = req_timeout;
1602         if (BIO_should_read(cbio)) {
1603             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1604         } else if (BIO_should_write(cbio)) {
1605             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1606         } else {
1607             BIO_puts(bio_err, "Unexpected retry condition\n");
1608             goto err;
1609         }
1610         if (rv == 0) {
1611             BIO_puts(bio_err, "Timeout on request\n");
1612             break;
1613         }
1614         if (rv == -1) {
1615             BIO_puts(bio_err, "Select error\n");
1616             break;
1617         }
1618
1619     }
1620  err:
1621     OCSP_REQ_CTX_free(ctx);
1622
1623     return rsp;
1624 }
1625
1626 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1627                                  const char *host, const char *path,
1628                                  const char *port, int use_ssl,
1629                                  STACK_OF(CONF_VALUE) *headers,
1630                                  int req_timeout)
1631 {
1632     BIO *cbio = NULL;
1633     SSL_CTX *ctx = NULL;
1634     OCSP_RESPONSE *resp = NULL;
1635
1636     cbio = BIO_new_connect(host);
1637     if (cbio == NULL) {
1638         BIO_printf(bio_err, "Error creating connect BIO\n");
1639         goto end;
1640     }
1641     if (port != NULL)
1642         BIO_set_conn_port(cbio, port);
1643     if (use_ssl == 1) {
1644         BIO *sbio;
1645         ctx = SSL_CTX_new(TLS_client_method());
1646         if (ctx == NULL) {
1647             BIO_printf(bio_err, "Error creating SSL context.\n");
1648             goto end;
1649         }
1650         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1651         sbio = BIO_new_ssl(ctx, 1);
1652         cbio = BIO_push(sbio, cbio);
1653     }
1654
1655     resp = query_responder(cbio, host, path, headers, req, req_timeout);
1656     if (resp == NULL)
1657         BIO_printf(bio_err, "Error querying OCSP responder\n");
1658  end:
1659     BIO_free_all(cbio);
1660     SSL_CTX_free(ctx);
1661     return resp;
1662 }
1663 # endif
1664
1665 #endif