apps/ocsp.c

   1 /*
   2  * Copyright 2001-2020 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_SYS_VMS
  13   /* So fd_set and friends get properly defined on OpenVMS */
  14 # define _XOPEN_SOURCE_EXTENDED
  15 #endif
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <time.h>
  21 #include <ctype.h>
  22
  23 /* Needs to be included before the openssl headers */
  24 #include "apps.h"
  25 #include "progs.h"
  26 #include "internal/sockets.h"
  27 #include <openssl/e_os2.h>
  28 #include <openssl/crypto.h>
  29 #include <openssl/err.h>
  30 #include <openssl/ssl.h>
  31 #include <openssl/evp.h>
  32 #include <openssl/bn.h>
  33 #include <openssl/x509v3.h>
  34 #include <openssl/rand.h>
  35
  36 #ifndef HAVE_FORK
  37 # if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS)
  38 #  define HAVE_FORK 0
  39 # else
  40 #  define HAVE_FORK 1
  41 # endif
  42 #endif
  43
  44 #if HAVE_FORK
  45 # undef NO_FORK
  46 #else
  47 # define NO_FORK
  48 #endif
  49
  50 #if !defined(NO_FORK) && !defined(OPENSSL_NO_SOCK) \
  51      && !defined(OPENSSL_NO_POSIX_IO)
  52 # define OCSP_DAEMON
  53 # include <sys/types.h>
  54 # include <sys/wait.h>
  55 # include <syslog.h>
  56 # include <signal.h>
  57 # define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
  58 #else
  59 # undef LOG_INFO
  60 # undef LOG_WARNING
  61 # undef LOG_ERR
  62 # define LOG_INFO      0
  63 # define LOG_WARNING   1
  64 # define LOG_ERR       2
  65 #endif
  66
  67 #if defined(OPENSSL_SYS_VXWORKS)
  68 /* not supported */
  69 int setpgid(pid_t pid, pid_t pgid)
  70 {
  71     errno = ENOSYS;
  72     return 0;
  73 }
  74 /* not supported */
  75 pid_t fork(void)
  76 {
  77     errno = ENOSYS;
  78     return (pid_t) -1;
  79 }
  80 #endif
  81 /* Maximum leeway in validity period: default 5 minutes */
  82 #define MAX_VALIDITY_PERIOD    (5 * 60)
  83
  84 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
  85                          const EVP_MD *cert_id_md, X509 *issuer,
  86                          STACK_OF(OCSP_CERTID) *ids);
  87 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
  88                            const EVP_MD *cert_id_md, X509 *issuer,
  89                            STACK_OF(OCSP_CERTID) *ids);
  90 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
  91                               STACK_OF(OPENSSL_STRING) *names,
  92                               STACK_OF(OCSP_CERTID) *ids, long nsec,
  93                               long maxage);
  94 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
  95                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
  96                               EVP_PKEY *rkey, const EVP_MD *md,
  97                               STACK_OF(OPENSSL_STRING) *sigopts,
  98                               STACK_OF(X509) *rother, unsigned long flags,
  99                               int nmin, int ndays, int badsig,
 100                               const EVP_MD *resp_md);
 101
 102 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 103 static BIO *init_responder(const char *port);
 104 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, int timeout);
 105 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 106 static void log_message(int level, const char *fmt, ...);
 107 static char *prog;
 108 static int multi = 0;
 109
 110 #ifdef OCSP_DAEMON
 111 static int acfd = (int) INVALID_SOCKET;
 112 static int index_changed(CA_DB *);
 113 static void spawn_loop(void);
 114 static int print_syslog(const char *str, size_t len, void *levPtr);
 115 static void socket_timeout(int signum);
 116 #endif
 117
 118 typedef enum OPTION_choice {
 119     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 120     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 121     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 122     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 123     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 124     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 125     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 126     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 127     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE,
 128     OPT_NOCAPATH, OPT_NOCASTORE,
 129     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 130     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 131     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 132     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
 133     OPT_PASSIN,
 134     OPT_RCID,
 135     OPT_V_ENUM,
 136     OPT_MD,
 137     OPT_MULTI, OPT_PROV_ENUM
 138 } OPTION_CHOICE;
 139
 140 const OPTIONS ocsp_options[] = {
 141     OPT_SECTION("General"),
 142     {"help", OPT_HELP, '-', "Display this summary"},
 143     {"ignore_err", OPT_IGNORE_ERR, '-',
 144      "Ignore error on OCSP request or response and continue running"},
 145     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 146     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 147     {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
 148     {"no-CAfile", OPT_NOCAFILE, '-',
 149      "Do not load the default certificates file"},
 150     {"no-CApath", OPT_NOCAPATH, '-',
 151      "Do not load certificates from the default certificates directory"},
 152     {"no-CAstore", OPT_NOCAPATH, '-',
 153      "Do not load certificates from the default certificates store"},
 154
 155     OPT_SECTION("Responder"),
 156     {"timeout", OPT_TIMEOUT, 'p',
 157      "Connection timeout (in seconds) to the OCSP responder"},
 158     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 159      "Don't include any certificates in response"},
 160 #ifdef OCSP_DAEMON
 161     {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
 162 #endif
 163     {"no_certs", OPT_NO_CERTS, '-',
 164      "Don't include any certificates in signed request"},
 165     {"badsig", OPT_BADSIG, '-',
 166         "Corrupt last byte of loaded OSCP response signature (for test)"},
 167     {"CA", OPT_CA, '<', "CA certificate"},
 168     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 169     {"nrequest", OPT_REQUEST, 'p',
 170      "Number of requests to accept (default unlimited)"},
 171     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 172     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 173     {"sign_other", OPT_SIGN_OTHER, '<',
 174      "Additional certificates to include in signed request"},
 175     {"index", OPT_INDEX, '<', "Certificate status index file"},
 176     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 177     {"rsigner", OPT_RSIGNER, '<',
 178      "Responder certificate to sign responses with"},
 179     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 180     {"passin", OPT_PASSIN, 's', "Responder key pass phrase source"},
 181     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 182     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
 183     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
 184     {"header", OPT_HEADER, 's', "key=value header to add"},
 185     {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
 186     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
 187
 188     OPT_SECTION("Client"),
 189     {"url", OPT_URL, 's', "Responder URL"},
 190     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
 191     {"port", OPT_PORT, 'p', "Port to run responder on"},
 192     {"out", OPT_OUTFILE, '>', "Output filename"},
 193     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 194     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 195     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 196     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 197      "Don't check signature on response"},
 198     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 199      "Identify response by signing certificate key ID"},
 200     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 201      "Don't check signing certificate"},
 202     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 203     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 204     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 205     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 206     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 207      "Don't do additional checks on signing certificate"},
 208     {"no_explicit", OPT_NO_EXPLICIT, '-',
 209      "Do not explicitly check the chain, just verify the root"},
 210     {"trust_other", OPT_TRUST_OTHER, '-',
 211      "Don't verify additional certificates"},
 212     {"no_intern", OPT_NO_INTERN, '-',
 213      "Don't search certificates contained in response for signer"},
 214     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 215     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 216     {"verify_other", OPT_VERIFY_OTHER, '<',
 217      "Additional certificates to search for signer"},
 218     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 219     {"cert", OPT_CERT, '<', "Certificate to check"},
 220     {"serial", OPT_SERIAL, 's', "Serial number to check"},
 221     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 222      "Maximum validity discrepancy in seconds"},
 223     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 224     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 225     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 226     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 227     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 228
 229     OPT_V_OPTIONS,
 230     OPT_PROV_OPTIONS,
 231     {NULL}
 232 };
 233
 234 int ocsp_main(int argc, char **argv)
 235 {
 236     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 237     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 238     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
 239     int trailing_md = 0;
 240     CA_DB *rdb = NULL;
 241     EVP_PKEY *key = NULL, *rkey = NULL;
 242     OCSP_BASICRESP *bs = NULL;
 243     OCSP_REQUEST *req = NULL;
 244     OCSP_RESPONSE *resp = NULL;
 245     STACK_OF(CONF_VALUE) *headers = NULL;
 246     STACK_OF(OCSP_CERTID) *ids = NULL;
 247     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 248     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 249     STACK_OF(X509) *issuers = NULL;
 250     X509 *issuer = NULL, *cert = NULL;
 251     STACK_OF(X509) *rca_cert = NULL;
 252     const EVP_MD *resp_certid_md = NULL;
 253     X509 *signer = NULL, *rsigner = NULL;
 254     X509_STORE *store = NULL;
 255     X509_VERIFY_PARAM *vpm = NULL;
 256     const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
 257     char *header, *value;
 258     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 259     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 260     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 261     char *rsignfile = NULL, *rkeyfile = NULL;
 262     char *passinarg = NULL, *passin = NULL;
 263     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 264     char *signfile = NULL, *keyfile = NULL;
 265     char *thost = NULL, *tport = NULL, *tpath = NULL;
 266     int noCAfile = 0, noCApath = 0, noCAstore = 0;
 267     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 268     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 269     int req_text = 0, resp_text = 0, ret = 1;
 270     int req_timeout = -1;
 271     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 272     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 273     OPTION_CHOICE o;
 274
 275     reqnames = sk_OPENSSL_STRING_new_null();
 276     if (reqnames == NULL)
 277         goto end;
 278     ids = sk_OCSP_CERTID_new_null();
 279     if (ids == NULL)
 280         goto end;
 281     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 282         return 1;
 283
 284     prog = opt_init(argc, argv, ocsp_options);
 285     while ((o = opt_next()) != OPT_EOF) {
 286         switch (o) {
 287         case OPT_EOF:
 288         case OPT_ERR:
 289  opthelp:
 290             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 291             goto end;
 292         case OPT_HELP:
 293             ret = 0;
 294             opt_help(ocsp_options);
 295             goto end;
 296         case OPT_OUTFILE:
 297             outfile = opt_arg();
 298             break;
 299         case OPT_TIMEOUT:
 300 #ifndef OPENSSL_NO_SOCK
 301             req_timeout = atoi(opt_arg());
 302 #endif
 303             break;
 304         case OPT_URL:
 305             OPENSSL_free(thost);
 306             OPENSSL_free(tport);
 307             OPENSSL_free(tpath);
 308             thost = tport = tpath = NULL;
 309             if (!OSSL_HTTP_parse_url(opt_arg(),
 310                                      &host, &port, &path, &use_ssl)) {
 311                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 312                 goto end;
 313             }
 314             thost = host;
 315             tport = port;
 316             tpath = path;
 317             break;
 318         case OPT_HOST:
 319             host = opt_arg();
 320             break;
 321         case OPT_PORT:
 322             port = opt_arg();
 323             break;
 324         case OPT_IGNORE_ERR:
 325             ignore_err = 1;
 326             break;
 327         case OPT_NOVERIFY:
 328             noverify = 1;
 329             break;
 330         case OPT_NONCE:
 331             add_nonce = 2;
 332             break;
 333         case OPT_NO_NONCE:
 334             add_nonce = 0;
 335             break;
 336         case OPT_RESP_NO_CERTS:
 337             rflags |= OCSP_NOCERTS;
 338             break;
 339         case OPT_RESP_KEY_ID:
 340             rflags |= OCSP_RESPID_KEY;
 341             break;
 342         case OPT_NO_CERTS:
 343             sign_flags |= OCSP_NOCERTS;
 344             break;
 345         case OPT_NO_SIGNATURE_VERIFY:
 346             verify_flags |= OCSP_NOSIGS;
 347             break;
 348         case OPT_NO_CERT_VERIFY:
 349             verify_flags |= OCSP_NOVERIFY;
 350             break;
 351         case OPT_NO_CHAIN:
 352             verify_flags |= OCSP_NOCHAIN;
 353             break;
 354         case OPT_NO_CERT_CHECKS:
 355             verify_flags |= OCSP_NOCHECKS;
 356             break;
 357         case OPT_NO_EXPLICIT:
 358             verify_flags |= OCSP_NOEXPLICIT;
 359             break;
 360         case OPT_TRUST_OTHER:
 361             verify_flags |= OCSP_TRUSTOTHER;
 362             break;
 363         case OPT_NO_INTERN:
 364             verify_flags |= OCSP_NOINTERN;
 365             break;
 366         case OPT_BADSIG:
 367             badsig = 1;
 368             break;
 369         case OPT_TEXT:
 370             req_text = resp_text = 1;
 371             break;
 372         case OPT_REQ_TEXT:
 373             req_text = 1;
 374             break;
 375         case OPT_RESP_TEXT:
 376             resp_text = 1;
 377             break;
 378         case OPT_REQIN:
 379             reqin = opt_arg();
 380             break;
 381         case OPT_RESPIN:
 382             respin = opt_arg();
 383             break;
 384         case OPT_SIGNER:
 385             signfile = opt_arg();
 386             break;
 387         case OPT_VAFILE:
 388             verify_certfile = opt_arg();
 389             verify_flags |= OCSP_TRUSTOTHER;
 390             break;
 391         case OPT_SIGN_OTHER:
 392             sign_certfile = opt_arg();
 393             break;
 394         case OPT_VERIFY_OTHER:
 395             verify_certfile = opt_arg();
 396             break;
 397         case OPT_CAFILE:
 398             CAfile = opt_arg();
 399             break;
 400         case OPT_CAPATH:
 401             CApath = opt_arg();
 402             break;
 403         case OPT_CASTORE:
 404             CAstore = opt_arg();
 405             break;
 406         case OPT_NOCAFILE:
 407             noCAfile = 1;
 408             break;
 409         case OPT_NOCAPATH:
 410             noCApath = 1;
 411             break;
 412         case OPT_NOCASTORE:
 413             noCAstore = 1;
 414             break;
 415         case OPT_V_CASES:
 416             if (!opt_verify(o, vpm))
 417                 goto end;
 418             vpmtouched++;
 419             break;
 420         case OPT_VALIDITY_PERIOD:
 421             opt_long(opt_arg(), &nsec);
 422             break;
 423         case OPT_STATUS_AGE:
 424             opt_long(opt_arg(), &maxage);
 425             break;
 426         case OPT_SIGNKEY:
 427             keyfile = opt_arg();
 428             break;
 429         case OPT_REQOUT:
 430             reqout = opt_arg();
 431             break;
 432         case OPT_RESPOUT:
 433             respout = opt_arg();
 434             break;
 435         case OPT_PATH:
 436             path = opt_arg();
 437             break;
 438         case OPT_ISSUER:
 439             issuer = load_cert(opt_arg(), FORMAT_PEM, "issuer certificate");
 440             if (issuer == NULL)
 441                 goto end;
 442             if (issuers == NULL) {
 443                 if ((issuers = sk_X509_new_null()) == NULL)
 444                     goto end;
 445             }
 446             if (!sk_X509_push(issuers, issuer))
 447                 goto end;
 448             break;
 449         case OPT_CERT:
 450             X509_free(cert);
 451             cert = load_cert(opt_arg(), FORMAT_PEM, "certificate");
 452             if (cert == NULL)
 453                 goto end;
 454             if (cert_id_md == NULL)
 455                 cert_id_md = EVP_sha1();
 456             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 457                 goto end;
 458             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 459                 goto end;
 460             trailing_md = 0;
 461             break;
 462         case OPT_SERIAL:
 463             if (cert_id_md == NULL)
 464                 cert_id_md = EVP_sha1();
 465             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 466                 goto end;
 467             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 468                 goto end;
 469             trailing_md = 0;
 470             break;
 471         case OPT_INDEX:
 472             ridx_filename = opt_arg();
 473             break;
 474         case OPT_CA:
 475             rca_filename = opt_arg();
 476             break;
 477         case OPT_NMIN:
 478             opt_int(opt_arg(), &nmin);
 479             if (ndays == -1)
 480                 ndays = 0;
 481             break;
 482         case OPT_REQUEST:
 483             opt_int(opt_arg(), &accept_count);
 484             break;
 485         case OPT_NDAYS:
 486             ndays = atoi(opt_arg());
 487             break;
 488         case OPT_RSIGNER:
 489             rsignfile = opt_arg();
 490             break;
 491         case OPT_RKEY:
 492             rkeyfile = opt_arg();
 493             break;
 494         case OPT_PASSIN:
 495             passinarg = opt_arg();
 496             break;
 497         case OPT_ROTHER:
 498             rcertfile = opt_arg();
 499             break;
 500         case OPT_RMD:   /* Response MessageDigest */
 501             if (!opt_md(opt_arg(), &rsign_md))
 502                 goto end;
 503             break;
 504         case OPT_RSIGOPT:
 505             if (rsign_sigopts == NULL)
 506                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
 507             if (rsign_sigopts == NULL || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
 508                 goto end;
 509             break;
 510         case OPT_HEADER:
 511             header = opt_arg();
 512             value = strchr(header, '=');
 513             if (value == NULL) {
 514                 BIO_printf(bio_err, "Missing = in header key=value\n");
 515                 goto opthelp;
 516             }
 517             *value++ = '\0';
 518             if (!X509V3_add_value(header, value, &headers))
 519                 goto end;
 520             break;
 521         case OPT_RCID:
 522             resp_certid_md = EVP_get_digestbyname(opt_arg());
 523             if (resp_certid_md == NULL)
 524                 goto opthelp;
 525             break;
 526         case OPT_MD:
 527             if (trailing_md) {
 528                 BIO_printf(bio_err,
 529                            "%s: Digest must be before -cert or -serial\n",
 530                            prog);
 531                 goto opthelp;
 532             }
 533             if (!opt_md(opt_unknown(), &cert_id_md))
 534                 goto opthelp;
 535             trailing_md = 1;
 536             break;
 537         case OPT_MULTI:
 538 #ifdef OCSP_DAEMON
 539             multi = atoi(opt_arg());
 540 #endif
 541             break;
 542         case OPT_PROV_CASES:
 543             if (!opt_provider(o))
 544                 goto end;
 545             break;
 546         }
 547     }
 548     if (trailing_md) {
 549         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
 550                    prog);
 551         goto opthelp;
 552     }
 553     argc = opt_num_rest();
 554     if (argc != 0)
 555         goto opthelp;
 556
 557     /* Have we anything to do? */
 558     if (req == NULL && reqin == NULL
 559         && respin == NULL && !(port != NULL && ridx_filename != NULL))
 560         goto opthelp;
 561
 562     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 563     if (out == NULL)
 564         goto end;
 565
 566     if (req == NULL && (add_nonce != 2))
 567         add_nonce = 0;
 568
 569     if (req == NULL && reqin != NULL) {
 570         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 571         if (derbio == NULL)
 572             goto end;
 573         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 574         BIO_free(derbio);
 575         if (req == NULL) {
 576             BIO_printf(bio_err, "Error reading OCSP request\n");
 577             goto end;
 578         }
 579     }
 580
 581     if (req == NULL && port != NULL) {
 582         acbio = init_responder(port);
 583         if (acbio == NULL)
 584             goto end;
 585     }
 586
 587     if (rsignfile != NULL) {
 588         if (rkeyfile == NULL)
 589             rkeyfile = rsignfile;
 590         rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
 591         if (rsigner == NULL) {
 592             BIO_printf(bio_err, "Error loading responder certificate\n");
 593             goto end;
 594         }
 595         if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
 596                         NULL, "CA certificate"))
 597             goto end;
 598         if (rcertfile != NULL) {
 599             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
 600                             "responder other certificates"))
 601                 goto end;
 602         }
 603         if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 604             BIO_printf(bio_err, "Error getting password\n");
 605             goto end;
 606         }
 607         rkey = load_key(rkeyfile, FORMAT_PEM, 0, passin, NULL,
 608                         "responder private key");
 609         if (rkey == NULL)
 610             goto end;
 611     }
 612
 613     if (ridx_filename != NULL
 614         && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
 615         BIO_printf(bio_err,
 616                    "Responder mode requires certificate, key, and CA.\n");
 617         goto end;
 618     }
 619
 620     if (ridx_filename != NULL) {
 621         rdb = load_index(ridx_filename, NULL);
 622         if (rdb == NULL || index_index(rdb) <= 0) {
 623             ret = 1;
 624             goto end;
 625         }
 626     }
 627
 628 #ifdef OCSP_DAEMON
 629     if (multi && acbio != NULL)
 630         spawn_loop();
 631     if (acbio != NULL && req_timeout > 0)
 632         signal(SIGALRM, socket_timeout);
 633 #endif
 634
 635     if (acbio != NULL)
 636         log_message(LOG_INFO, "waiting for OCSP client connections...");
 637
 638 redo_accept:
 639
 640     if (acbio != NULL) {
 641 #ifdef OCSP_DAEMON
 642         if (index_changed(rdb)) {
 643             CA_DB *newrdb = load_index(ridx_filename, NULL);
 644
 645             if (newrdb != NULL && index_index(newrdb) > 0) {
 646                 free_index(rdb);
 647                 rdb = newrdb;
 648             } else {
 649                 free_index(newrdb);
 650                 log_message(LOG_ERR, "error reloading updated index: %s",
 651                             ridx_filename);
 652             }
 653         }
 654 #endif
 655
 656         req = NULL;
 657         if (!do_responder(&req, &cbio, acbio, req_timeout))
 658             goto redo_accept;
 659
 660         if (req == NULL) {
 661             resp =
 662                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 663                                      NULL);
 664             send_ocsp_response(cbio, resp);
 665             goto done_resp;
 666         }
 667     }
 668
 669     if (req == NULL
 670         && (signfile != NULL || reqout != NULL
 671             || host != NULL || add_nonce || ridx_filename != NULL)) {
 672         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 673         goto end;
 674     }
 675
 676     if (req != NULL && add_nonce) {
 677         if (!OCSP_request_add1_nonce(req, NULL, -1))
 678             goto end;
 679     }
 680
 681     if (signfile != NULL) {
 682         if (keyfile == NULL)
 683             keyfile = signfile;
 684         signer = load_cert(signfile, FORMAT_PEM, "signer certificate");
 685         if (signer == NULL) {
 686             BIO_printf(bio_err, "Error loading signer certificate\n");
 687             goto end;
 688         }
 689         if (sign_certfile != NULL) {
 690             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL,
 691                             "signer certificates"))
 692                 goto end;
 693         }
 694         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 695                        "signer private key");
 696         if (key == NULL)
 697             goto end;
 698
 699         if (!OCSP_request_sign
 700             (req, signer, key, NULL, sign_other, sign_flags)) {
 701             BIO_printf(bio_err, "Error signing OCSP request\n");
 702             goto end;
 703         }
 704     }
 705
 706     if (req_text && req != NULL)
 707         OCSP_REQUEST_print(out, req, 0);
 708
 709     if (reqout != NULL) {
 710         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 711         if (derbio == NULL)
 712             goto end;
 713         i2d_OCSP_REQUEST_bio(derbio, req);
 714         BIO_free(derbio);
 715     }
 716
 717     if (rdb != NULL) {
 718         make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
 719                            rsign_md, rsign_sigopts, rother, rflags, nmin, ndays, badsig,
 720                            resp_certid_md);
 721         if (cbio != NULL)
 722             send_ocsp_response(cbio, resp);
 723     } else if (host != NULL) {
 724 #ifndef OPENSSL_NO_SOCK
 725         resp = process_responder(req, host, path,
 726                                  port, use_ssl, headers, req_timeout);
 727         if (resp == NULL)
 728             goto end;
 729 #else
 730         BIO_printf(bio_err,
 731                    "Error creating connect BIO - sockets not supported.\n");
 732         goto end;
 733 #endif
 734     } else if (respin != NULL) {
 735         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 736         if (derbio == NULL)
 737             goto end;
 738         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 739         BIO_free(derbio);
 740         if (resp == NULL) {
 741             BIO_printf(bio_err, "Error reading OCSP response\n");
 742             goto end;
 743         }
 744     } else {
 745         ret = 0;
 746         goto end;
 747     }
 748
 749  done_resp:
 750
 751     if (respout != NULL) {
 752         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 753         if (derbio == NULL)
 754             goto end;
 755         i2d_OCSP_RESPONSE_bio(derbio, resp);
 756         BIO_free(derbio);
 757     }
 758
 759     i = OCSP_response_status(resp);
 760     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 761         BIO_printf(out, "Responder Error: %s (%d)\n",
 762                    OCSP_response_status_str(i), i);
 763         if (!ignore_err)
 764                 goto end;
 765     }
 766
 767     if (resp_text)
 768         OCSP_RESPONSE_print(out, resp, 0);
 769
 770     /* If running as responder don't verify our own response */
 771     if (cbio != NULL) {
 772         /* If not unlimited, see if we took all we should. */
 773         if (accept_count != -1 && --accept_count <= 0) {
 774             ret = 0;
 775             goto end;
 776         }
 777         BIO_free_all(cbio);
 778         cbio = NULL;
 779         OCSP_REQUEST_free(req);
 780         req = NULL;
 781         OCSP_RESPONSE_free(resp);
 782         resp = NULL;
 783         goto redo_accept;
 784     }
 785     if (ridx_filename != NULL) {
 786         ret = 0;
 787         goto end;
 788     }
 789
 790     if (store == NULL) {
 791         store = setup_verify(CAfile, noCAfile, CApath, noCApath,
 792                              CAstore, noCAstore);
 793         if (!store)
 794             goto end;
 795     }
 796     if (vpmtouched)
 797         X509_STORE_set1_param(store, vpm);
 798     if (verify_certfile != NULL) {
 799         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
 800                         "validator certificate"))
 801             goto end;
 802     }
 803
 804     bs = OCSP_response_get1_basic(resp);
 805     if (bs == NULL) {
 806         BIO_printf(bio_err, "Error parsing response\n");
 807         goto end;
 808     }
 809
 810     ret = 0;
 811
 812     if (!noverify) {
 813         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 814             if (i == -1)
 815                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 816             else {
 817                 BIO_printf(bio_err, "Nonce Verify error\n");
 818                 ret = 1;
 819                 goto end;
 820             }
 821         }
 822
 823         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 824         if (i <= 0 && issuers) {
 825             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 826             if (i > 0)
 827                 ERR_clear_error();
 828         }
 829         if (i <= 0) {
 830             BIO_printf(bio_err, "Response Verify Failure\n");
 831             ERR_print_errors(bio_err);
 832             ret = 1;
 833         } else {
 834             BIO_printf(bio_err, "Response verify OK\n");
 835         }
 836     }
 837
 838     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 839
 840  end:
 841     ERR_print_errors(bio_err);
 842     X509_free(signer);
 843     X509_STORE_free(store);
 844     X509_VERIFY_PARAM_free(vpm);
 845     sk_OPENSSL_STRING_free(rsign_sigopts);
 846     EVP_PKEY_free(key);
 847     EVP_PKEY_free(rkey);
 848     X509_free(cert);
 849     sk_X509_pop_free(issuers, X509_free);
 850     X509_free(rsigner);
 851     sk_X509_pop_free(rca_cert, X509_free);
 852     free_index(rdb);
 853     BIO_free_all(cbio);
 854     BIO_free_all(acbio);
 855     BIO_free_all(out);
 856     OCSP_REQUEST_free(req);
 857     OCSP_RESPONSE_free(resp);
 858     OCSP_BASICRESP_free(bs);
 859     sk_OPENSSL_STRING_free(reqnames);
 860     sk_OCSP_CERTID_free(ids);
 861     sk_X509_pop_free(sign_other, X509_free);
 862     sk_X509_pop_free(verify_other, X509_free);
 863     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 864     OPENSSL_free(thost);
 865     OPENSSL_free(tport);
 866     OPENSSL_free(tpath);
 867
 868     return ret;
 869 }
 870
 871 static void
 872 log_message(int level, const char *fmt, ...)
 873 {
 874     va_list ap;
 875
 876     va_start(ap, fmt);
 877 #ifdef OCSP_DAEMON
 878     if (multi) {
 879         char buf[1024];
 880         if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
 881             syslog(level, "%s", buf);
 882         }
 883         if (level >= LOG_ERR)
 884             ERR_print_errors_cb(print_syslog, &level);
 885     }
 886 #endif
 887     if (!multi) {
 888         BIO_printf(bio_err, "%s: ", prog);
 889         BIO_vprintf(bio_err, fmt, ap);
 890         BIO_printf(bio_err, "\n");
 891     }
 892     va_end(ap);
 893 }
 894
 895 #ifdef OCSP_DAEMON
 896
 897 static int print_syslog(const char *str, size_t len, void *levPtr)
 898 {
 899     int level = *(int *)levPtr;
 900     int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
 901
 902     syslog(level, "%.*s", ilen, str);
 903
 904     return ilen;
 905 }
 906
 907 static int index_changed(CA_DB *rdb)
 908 {
 909     struct stat sb;
 910
 911     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
 912         if (rdb->dbst.st_mtime != sb.st_mtime
 913             || rdb->dbst.st_ctime != sb.st_ctime
 914             || rdb->dbst.st_ino != sb.st_ino
 915             || rdb->dbst.st_dev != sb.st_dev) {
 916             syslog(LOG_INFO, "index file changed, reloading");
 917             return 1;
 918         }
 919     }
 920     return 0;
 921 }
 922
 923 static void killall(int ret, pid_t *kidpids)
 924 {
 925     int i;
 926
 927     for (i = 0; i < multi; ++i)
 928         if (kidpids[i] != 0)
 929             (void)kill(kidpids[i], SIGTERM);
 930     OPENSSL_free(kidpids);
 931     sleep(1);
 932     exit(ret);
 933 }
 934
 935 static int termsig = 0;
 936
 937 static void noteterm (int sig)
 938 {
 939     termsig = sig;
 940 }
 941
 942 /*
 943  * Loop spawning up to `multi` child processes, only child processes return
 944  * from this function.  The parent process loops until receiving a termination
 945  * signal, kills extant children and exits without returning.
 946  */
 947 static void spawn_loop(void)
 948 {
 949     pid_t *kidpids = NULL;
 950     int status;
 951     int procs = 0;
 952     int i;
 953
 954     openlog(prog, LOG_PID, LOG_DAEMON);
 955
 956     if (setpgid(0, 0)) {
 957         syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
 958                strerror(errno));
 959         exit(1);
 960     }
 961     kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
 962     for (i = 0; i < multi; ++i)
 963         kidpids[i] = 0;
 964
 965     signal(SIGINT, noteterm);
 966     signal(SIGTERM, noteterm);
 967
 968     while (termsig == 0) {
 969         pid_t fpid;
 970
 971         /*
 972          * Wait for a child to replace when we're at the limit.
 973          * Slow down if a child exited abnormally or waitpid() < 0
 974          */
 975         while (termsig == 0 && procs >= multi) {
 976             if ((fpid = waitpid(-1, &status, 0)) > 0) {
 977                 for (i = 0; i < procs; ++i) {
 978                     if (kidpids[i] == fpid) {
 979                         kidpids[i] = 0;
 980                         --procs;
 981                         break;
 982                     }
 983                 }
 984                 if (i >= multi) {
 985                     syslog(LOG_ERR, "fatal: internal error: "
 986                            "no matching child slot for pid: %ld",
 987                            (long) fpid);
 988                     killall(1, kidpids);
 989                 }
 990                 if (status != 0) {
 991                     if (WIFEXITED(status))
 992                         syslog(LOG_WARNING, "child process: %ld, exit status: %d",
 993                                (long)fpid, WEXITSTATUS(status));
 994                     else if (WIFSIGNALED(status))
 995                         syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
 996                                (long)fpid, WTERMSIG(status),
 997 #ifdef WCOREDUMP
 998                                WCOREDUMP(status) ? " (core dumped)" :
 999 #endif
1000                                "");
1001                     sleep(1);
1002                 }
1003                 break;
1004             } else if (errno != EINTR) {
1005                 syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
1006                 killall(1, kidpids);
1007             }
1008         }
1009         if (termsig)
1010             break;
1011
1012         switch(fpid = fork()) {
1013         case -1:            /* error */
1014             /* System critically low on memory, pause and try again later */
1015             sleep(30);
1016             break;
1017         case 0:             /* child */
1018             OPENSSL_free(kidpids);
1019             signal(SIGINT, SIG_DFL);
1020             signal(SIGTERM, SIG_DFL);
1021             if (termsig)
1022                 _exit(0);
1023             if (RAND_poll() <= 0) {
1024                 syslog(LOG_ERR, "fatal: RAND_poll() failed");
1025                 _exit(1);
1026             }
1027             return;
1028         default:            /* parent */
1029             for (i = 0; i < multi; ++i) {
1030                 if (kidpids[i] == 0) {
1031                     kidpids[i] = fpid;
1032                     procs++;
1033                     break;
1034                 }
1035             }
1036             if (i >= multi) {
1037                 syslog(LOG_ERR, "fatal: internal error: no free child slots");
1038                 killall(1, kidpids);
1039             }
1040             break;
1041         }
1042     }
1043
1044     /* The loop above can only break on termsig */
1045     syslog(LOG_INFO, "terminating on signal: %d", termsig);
1046     killall(0, kidpids);
1047 }
1048 #endif
1049
1050 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
1051                          const EVP_MD *cert_id_md, X509 *issuer,
1052                          STACK_OF(OCSP_CERTID) *ids)
1053 {
1054     OCSP_CERTID *id;
1055
1056     if (issuer == NULL) {
1057         BIO_printf(bio_err, "No issuer certificate specified\n");
1058         return 0;
1059     }
1060     if (*req == NULL)
1061         *req = OCSP_REQUEST_new();
1062     if (*req == NULL)
1063         goto err;
1064     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
1065     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1066         goto err;
1067     if (!OCSP_request_add0_id(*req, id))
1068         goto err;
1069     return 1;
1070
1071  err:
1072     BIO_printf(bio_err, "Error Creating OCSP request\n");
1073     return 0;
1074 }
1075
1076 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
1077                            const EVP_MD *cert_id_md, X509 *issuer,
1078                            STACK_OF(OCSP_CERTID) *ids)
1079 {
1080     OCSP_CERTID *id;
1081     const X509_NAME *iname;
1082     ASN1_BIT_STRING *ikey;
1083     ASN1_INTEGER *sno;
1084
1085     if (issuer == NULL) {
1086         BIO_printf(bio_err, "No issuer certificate specified\n");
1087         return 0;
1088     }
1089     if (*req == NULL)
1090         *req = OCSP_REQUEST_new();
1091     if (*req == NULL)
1092         goto err;
1093     iname = X509_get_subject_name(issuer);
1094     ikey = X509_get0_pubkey_bitstr(issuer);
1095     sno = s2i_ASN1_INTEGER(NULL, serial);
1096     if (sno == NULL) {
1097         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
1098         return 0;
1099     }
1100     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
1101     ASN1_INTEGER_free(sno);
1102     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
1103         goto err;
1104     if (!OCSP_request_add0_id(*req, id))
1105         goto err;
1106     return 1;
1107
1108  err:
1109     BIO_printf(bio_err, "Error Creating OCSP request\n");
1110     return 0;
1111 }
1112
1113 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
1114                               STACK_OF(OPENSSL_STRING) *names,
1115                               STACK_OF(OCSP_CERTID) *ids, long nsec,
1116                               long maxage)
1117 {
1118     OCSP_CERTID *id;
1119     const char *name;
1120     int i, status, reason;
1121     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1122
1123     if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
1124         || !sk_OCSP_CERTID_num(ids))
1125         return;
1126
1127     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
1128         id = sk_OCSP_CERTID_value(ids, i);
1129         name = sk_OPENSSL_STRING_value(names, i);
1130         BIO_printf(out, "%s: ", name);
1131
1132         if (!OCSP_resp_find_status(bs, id, &status, &reason,
1133                                    &rev, &thisupd, &nextupd)) {
1134             BIO_puts(out, "ERROR: No Status found.\n");
1135             continue;
1136         }
1137
1138         /*
1139          * Check validity: if invalid write to output BIO so we know which
1140          * response this refers to.
1141          */
1142         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1143             BIO_puts(out, "WARNING: Status times invalid.\n");
1144             ERR_print_errors(out);
1145         }
1146         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1147
1148         BIO_puts(out, "\tThis Update: ");
1149         ASN1_GENERALIZEDTIME_print(out, thisupd);
1150         BIO_puts(out, "\n");
1151
1152         if (nextupd) {
1153             BIO_puts(out, "\tNext Update: ");
1154             ASN1_GENERALIZEDTIME_print(out, nextupd);
1155             BIO_puts(out, "\n");
1156         }
1157
1158         if (status != V_OCSP_CERTSTATUS_REVOKED)
1159             continue;
1160
1161         if (reason != -1)
1162             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1163
1164         BIO_puts(out, "\tRevocation Time: ");
1165         ASN1_GENERALIZEDTIME_print(out, rev);
1166         BIO_puts(out, "\n");
1167     }
1168 }
1169
1170 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1171                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1172                               EVP_PKEY *rkey, const EVP_MD *rmd,
1173                               STACK_OF(OPENSSL_STRING) *sigopts,
1174                               STACK_OF(X509) *rother, unsigned long flags,
1175                               int nmin, int ndays, int badsig,
1176                               const EVP_MD *resp_md)
1177 {
1178     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1179     OCSP_CERTID *cid;
1180     OCSP_BASICRESP *bs = NULL;
1181     int i, id_count;
1182     EVP_MD_CTX *mctx = NULL;
1183     EVP_PKEY_CTX *pkctx = NULL;
1184
1185     id_count = OCSP_request_onereq_count(req);
1186
1187     if (id_count <= 0) {
1188         *resp =
1189             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1190         goto end;
1191     }
1192
1193     bs = OCSP_BASICRESP_new();
1194     thisupd = X509_gmtime_adj(NULL, 0);
1195     if (ndays != -1)
1196         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1197
1198     /* Examine each certificate id in the request */
1199     for (i = 0; i < id_count; i++) {
1200         OCSP_ONEREQ *one;
1201         ASN1_INTEGER *serial;
1202         char **inf;
1203         int jj;
1204         int found = 0;
1205         ASN1_OBJECT *cert_id_md_oid;
1206         const EVP_MD *cert_id_md;
1207         OCSP_CERTID *cid_resp_md = NULL;
1208
1209         one = OCSP_request_onereq_get0(req, i);
1210         cid = OCSP_onereq_get0_id(one);
1211
1212         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1213
1214         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1215         if (cert_id_md == NULL) {
1216             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1217                                          NULL);
1218             goto end;
1219         }
1220         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1221             X509 *ca_cert = sk_X509_value(ca, jj);
1222             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1223
1224             if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
1225                 found = 1;
1226                 if (resp_md != NULL)
1227                     cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
1228             }
1229             OCSP_CERTID_free(ca_id);
1230         }
1231         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1232         inf = lookup_serial(db, serial);
1233
1234         /* at this point, we can have cid be an alias of cid_resp_md */
1235         cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
1236
1237         if (!found) {
1238             OCSP_basic_add1_status(bs, cid,
1239                                    V_OCSP_CERTSTATUS_UNKNOWN,
1240                                    0, NULL, thisupd, nextupd);
1241             continue;
1242         }
1243         if (inf == NULL) {
1244             OCSP_basic_add1_status(bs, cid,
1245                                    V_OCSP_CERTSTATUS_UNKNOWN,
1246                                    0, NULL, thisupd, nextupd);
1247         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1248             OCSP_basic_add1_status(bs, cid,
1249                                    V_OCSP_CERTSTATUS_GOOD,
1250                                    0, NULL, thisupd, nextupd);
1251         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1252             ASN1_OBJECT *inst = NULL;
1253             ASN1_TIME *revtm = NULL;
1254             ASN1_GENERALIZEDTIME *invtm = NULL;
1255             OCSP_SINGLERESP *single;
1256             int reason = -1;
1257
1258             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1259             single = OCSP_basic_add1_status(bs, cid,
1260                                             V_OCSP_CERTSTATUS_REVOKED,
1261                                             reason, revtm, thisupd, nextupd);
1262             if (invtm != NULL)
1263                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1264                                              invtm, 0, 0);
1265             else if (inst != NULL)
1266                 OCSP_SINGLERESP_add1_ext_i2d(single,
1267                                              NID_hold_instruction_code, inst,
1268                                              0, 0);
1269             ASN1_OBJECT_free(inst);
1270             ASN1_TIME_free(revtm);
1271             ASN1_GENERALIZEDTIME_free(invtm);
1272         }
1273         OCSP_CERTID_free(cid_resp_md);
1274     }
1275
1276     OCSP_copy_nonce(bs, req);
1277
1278     mctx = EVP_MD_CTX_new();
1279     if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1280         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1281         goto end;
1282     }
1283     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1284         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1285
1286         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1287             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1288             ERR_print_errors(bio_err);
1289             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1290                                          NULL);
1291             goto end;
1292         }
1293     }
1294     if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1295         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1296         goto end;
1297     }
1298
1299     if (badsig) {
1300         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1301         corrupt_signature(sig);
1302     }
1303
1304     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1305
1306  end:
1307     EVP_MD_CTX_free(mctx);
1308     ASN1_TIME_free(thisupd);
1309     ASN1_TIME_free(nextupd);
1310     OCSP_BASICRESP_free(bs);
1311 }
1312
1313 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1314 {
1315     int i;
1316     BIGNUM *bn = NULL;
1317     char *itmp, *row[DB_NUMBER], **rrow;
1318     for (i = 0; i < DB_NUMBER; i++)
1319         row[i] = NULL;
1320     bn = ASN1_INTEGER_to_BN(ser, NULL);
1321     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1322                                  * point and abort */
1323     if (BN_is_zero(bn))
1324         itmp = OPENSSL_strdup("00");
1325     else
1326         itmp = BN_bn2hex(bn);
1327     row[DB_serial] = itmp;
1328     BN_free(bn);
1329     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1330     OPENSSL_free(itmp);
1331     return rrow;
1332 }
1333
1334 /* Quick and dirty OCSP server: read in and parse input request */
1335
1336 static BIO *init_responder(const char *port)
1337 {
1338 #ifdef OPENSSL_NO_SOCK
1339     BIO_printf(bio_err,
1340                "Error setting up accept BIO - sockets not supported.\n");
1341     return NULL;
1342 #else
1343     BIO *acbio = NULL, *bufbio = NULL;
1344
1345     bufbio = BIO_new(BIO_f_buffer());
1346     if (bufbio == NULL)
1347         goto err;
1348     acbio = BIO_new(BIO_s_accept());
1349     if (acbio == NULL
1350         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1351         || BIO_set_accept_port(acbio, port) < 0) {
1352         log_message(LOG_ERR, "Error setting up accept BIO");
1353         goto err;
1354     }
1355
1356     BIO_set_accept_bios(acbio, bufbio);
1357     bufbio = NULL;
1358     if (BIO_do_accept(acbio) <= 0) {
1359         log_message(LOG_ERR, "Error starting accept");
1360         goto err;
1361     }
1362
1363     return acbio;
1364
1365  err:
1366     BIO_free_all(acbio);
1367     BIO_free(bufbio);
1368     return NULL;
1369 #endif
1370 }
1371
1372 #ifndef OPENSSL_NO_SOCK
1373 /*
1374  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1375  */
1376 static int urldecode(char *p)
1377 {
1378     unsigned char *out = (unsigned char *)p;
1379     unsigned char *save = out;
1380
1381     for (; *p; p++) {
1382         if (*p != '%')
1383             *out++ = *p;
1384         else if (isxdigit(_UC(p[1])) && isxdigit(_UC(p[2]))) {
1385             /* Don't check, can't fail because of ixdigit() call. */
1386             *out++ = (OPENSSL_hexchar2int(p[1]) << 4)
1387                    | OPENSSL_hexchar2int(p[2]);
1388             p += 2;
1389         }
1390         else
1391             return -1;
1392     }
1393     *out = '\0';
1394     return (int)(out - save);
1395 }
1396 #endif
1397
1398 #ifdef OCSP_DAEMON
1399 static void socket_timeout(int signum)
1400 {
1401     if (acfd != (int)INVALID_SOCKET)
1402         (void)shutdown(acfd, SHUT_RD);
1403 }
1404 #endif
1405
1406 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1407                         int timeout)
1408 {
1409 #ifdef OPENSSL_NO_SOCK
1410     return 0;
1411 #else
1412     int len;
1413     OCSP_REQUEST *req = NULL;
1414     char inbuf[2048], reqbuf[2048];
1415     char *p, *q;
1416     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1417     const char *client;
1418
1419     *preq = NULL;
1420
1421     /* Connection loss before accept() is routine, ignore silently */
1422     if (BIO_do_accept(acbio) <= 0)
1423         return 0;
1424
1425     cbio = BIO_pop(acbio);
1426     *pcbio = cbio;
1427     client = BIO_get_peer_name(cbio);
1428
1429 # ifdef OCSP_DAEMON
1430     if (timeout > 0) {
1431         (void) BIO_get_fd(cbio, &acfd);
1432         alarm(timeout);
1433     }
1434 # endif
1435
1436     /* Read the request line. */
1437     len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
1438     if (len <= 0)
1439         goto out;
1440
1441     if (strncmp(reqbuf, "GET ", 4) == 0) {
1442         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1443         for (p = reqbuf + 4; *p == ' '; ++p)
1444             continue;
1445         if (*p != '/') {
1446             log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
1447             goto out;
1448         }
1449         p++;
1450
1451         /* Splice off the HTTP version identifier. */
1452         for (q = p; *q; q++)
1453             if (*q == ' ')
1454                 break;
1455         if (strncmp(q, " HTTP/1.", 8) != 0) {
1456             log_message(LOG_INFO,
1457                         "Invalid request -- bad HTTP version: %s", client);
1458             goto out;
1459         }
1460         *q = '\0';
1461
1462         /*
1463          * Skip "GET / HTTP..." requests often used by load-balancers.  Note:
1464          * 'p' was incremented above to point to the first byte *after* the
1465          * leading slash, so with 'GET / ' it is now an empty string.
1466          */
1467         if (p[0] == '\0')
1468             goto out;
1469
1470         len = urldecode(p);
1471         if (len <= 0) {
1472             log_message(LOG_INFO,
1473                         "Invalid request -- bad URL encoding: %s", client);
1474             goto out;
1475         }
1476         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1477             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1478             log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
1479             goto out;
1480         }
1481         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1482         getbio = BIO_push(b64, getbio);
1483     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1484         log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
1485         goto out;
1486     }
1487
1488     /* Read and skip past the headers. */
1489     for (;;) {
1490         len = BIO_gets(cbio, inbuf, sizeof(inbuf));
1491         if (len <= 0)
1492             goto out;
1493         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1494             break;
1495     }
1496
1497 # ifdef OCSP_DAEMON
1498     /* Clear alarm before we close the client socket */
1499     alarm(0);
1500     timeout = 0;
1501 # endif
1502
1503     /* Try to read OCSP request */
1504     if (getbio != NULL) {
1505         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1506         BIO_free_all(getbio);
1507     } else {
1508         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1509     }
1510
1511     if (req == NULL)
1512         log_message(LOG_ERR, "Error parsing OCSP request");
1513
1514     *preq = req;
1515
1516 out:
1517 # ifdef OCSP_DAEMON
1518     if (timeout > 0)
1519         alarm(0);
1520     acfd = (int)INVALID_SOCKET;
1521 # endif
1522     return 1;
1523 #endif
1524 }
1525
1526 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1527 {
1528     char http_resp[] =
1529         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1530         "Content-Length: %d\r\n\r\n";
1531     if (cbio == NULL)
1532         return 0;
1533     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1534     i2d_OCSP_RESPONSE_bio(cbio, resp);
1535     (void)BIO_flush(cbio);
1536     return 1;
1537 }
1538
1539 #ifndef OPENSSL_NO_SOCK
1540 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1541                                  const char *host, const char *path,
1542                                  const char *port, int use_ssl,
1543                                  STACK_OF(CONF_VALUE) *headers,
1544                                  int req_timeout)
1545 {
1546     SSL_CTX *ctx = NULL;
1547     OCSP_RESPONSE *resp = NULL;
1548
1549     if (use_ssl == 1) {
1550         ctx = SSL_CTX_new(TLS_client_method());
1551         if (ctx == NULL) {
1552             BIO_printf(bio_err, "Error creating SSL context.\n");
1553             goto end;
1554         }
1555         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1556     }
1557
1558     resp = (OCSP_RESPONSE *)
1559         app_http_post_asn1(host, port, path, NULL, NULL /* no proxy used */,
1560                            ctx, headers, "application/ocsp-request",
1561                            (ASN1_VALUE *)req, ASN1_ITEM_rptr(OCSP_REQUEST),
1562                            req_timeout, ASN1_ITEM_rptr(OCSP_RESPONSE));
1563
1564     if (resp == NULL)
1565         BIO_printf(bio_err, "Error querying OCSP responder\n");
1566
1567  end:
1568     SSL_CTX_free(ctx);
1569     return resp;
1570 }
1571 #endif