apps/ocsp.c

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