deps: upgrade openssl sources to 1.1.1a

This updates all sources in deps/openssl/openssl with openssl-1.1.1a.

PR-URL: https://github.com/nodejs/node/pull/25381
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Shigeki Ohtsu <ohtsu@ohtsu.org>

1 files changed, 453 insertions, 149 deletions

diff --git a/deps/openssl/openssl/apps/ocsp.c b/deps/openssl/openssl/apps/ocsp.c
index 0c15f5114d..7fd78624bb 100644
--- a/deps/openssl/openssl/apps/ocsp.c
+++ b/deps/openssl/openssl/apps/ocsp.c
@@ -17,8 +17,6 @@ NON_EMPTY_TRANSLATION_UNIT
                                  * on OpenVMS */
 # endif
 
-# define USE_SOCKETS
-
 # include <stdio.h>
 # include <stdlib.h>
 # include <string.h>
@@ -27,6 +25,8 @@ NON_EMPTY_TRANSLATION_UNIT
 
 /* Needs to be included before the openssl headers */
 # include "apps.h"
+# include "progs.h"
+# include "internal/sockets.h"
 # include <openssl/e_os2.h>
 # include <openssl/crypto.h>
 # include <openssl/err.h>
@@ -34,20 +34,23 @@ NON_EMPTY_TRANSLATION_UNIT
 # include <openssl/evp.h>
 # include <openssl/bn.h>
 # include <openssl/x509v3.h>
-
-# if defined(NETWARE_CLIB)
-#  ifdef NETWARE_BSDSOCK
-#   include <sys/socket.h>
-#   include <sys/bsdskt.h>
-#  else
-#   include <novsock2.h>
-#  endif
-# elif defined(NETWARE_LIBC)
-#  ifdef NETWARE_BSDSOCK
-#   include <sys/select.h>
-#  else
-#   include <novsock2.h>
-#  endif
+# include <openssl/rand.h>
+
+# if defined(OPENSSL_SYS_UNIX) && !defined(OPENSSL_NO_SOCK) \
+     && !defined(OPENSSL_NO_POSIX_IO)
+#  define OCSP_DAEMON
+#  include <sys/types.h>
+#  include <sys/wait.h>
+#  include <syslog.h>
+#  include <signal.h>
+#  define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
+# else
+#  undef LOG_INFO
+#  undef LOG_WARNING
+#  undef LOG_ERR
+#  define LOG_INFO      0
+#  define LOG_WARNING   1
+#  define LOG_ERR       2
 # endif
 
 /* Maximum leeway in validity period: default 5 minutes */
@@ -63,16 +66,28 @@ static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
                               STACK_OF(OPENSSL_STRING) *names,
                               STACK_OF(OCSP_CERTID) *ids, long nsec,
                               long maxage);
-static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
-                              CA_DB *db, X509 *ca, X509 *rcert,
+static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
+                              CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
                               EVP_PKEY *rkey, const EVP_MD *md,
+                              STACK_OF(OPENSSL_STRING) *sigopts,
                               STACK_OF(X509) *rother, unsigned long flags,
                               int nmin, int ndays, int badsig);
 
 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 static BIO *init_responder(const char *port);
-static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio);
+static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, int timeout);
 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
+static void log_message(int level, const char *fmt, ...);
+static char *prog;
+static int multi = 0;
+
+# ifdef OCSP_DAEMON
+static int acfd = (int) INVALID_SOCKET;
+static int index_changed(CA_DB *);
+static void spawn_loop(void);
+static int print_syslog(const char *str, size_t len, void *levPtr);
+static void sock_timeout(int signum);
+# endif
 
 # ifndef OPENSSL_NO_SOCK
 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
@@ -94,12 +109,13 @@ typedef enum OPTION_choice {
     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
-    OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_HEADER,
+    OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
     OPT_V_ENUM,
-    OPT_MD
+    OPT_MD,
+    OPT_MULTI
 } OPTION_CHOICE;
 
-OPTIONS ocsp_options[] = {
+const OPTIONS ocsp_options[] = {
     {"help", OPT_HELP, '-', "Display this summary"},
     {"out", OPT_OUTFILE, '>', "Output filename"},
     {"timeout", OPT_TIMEOUT, 'p',
@@ -108,7 +124,7 @@ OPTIONS ocsp_options[] = {
     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
     {"port", OPT_PORT, 'p', "Port to run responder on"},
     {"ignore_err", OPT_IGNORE_ERR, '-',
-     "Ignore Error response from OCSP responder, and retry "},
+     "Ignore error on OCSP request or response and continue running"},
     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
@@ -116,6 +132,9 @@ OPTIONS ocsp_options[] = {
      "Don't include any certificates in response"},
     {"resp_key_id", OPT_RESP_KEY_ID, '-',
      "Identify response by signing certificate key ID"},
+# ifdef OCSP_DAEMON
+    {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
+# endif
     {"no_certs", OPT_NO_CERTS, '-',
      "Don't include any certificates in signed request"},
     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
@@ -171,6 +190,7 @@ OPTIONS ocsp_options[] = {
     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
+    {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
     {"header", OPT_HEADER, 's', "key=value header to add"},
     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
     OPT_V_OPTIONS,
@@ -181,6 +201,7 @@ int ocsp_main(int argc, char **argv)
 {
     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
+    STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
     int trailing_md = 0;
     CA_DB *rdb = NULL;
     EVP_PKEY *key = NULL, *rkey = NULL;
@@ -192,7 +213,8 @@ int ocsp_main(int argc, char **argv)
     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
     STACK_OF(X509) *issuers = NULL;
-    X509 *issuer = NULL, *cert = NULL, *rca_cert = NULL;
+    X509 *issuer = NULL, *cert = NULL;
+    STACK_OF(X509) *rca_cert = NULL;
     X509 *signer = NULL, *rsigner = NULL;
     X509_STORE *store = NULL;
     X509_VERIFY_PARAM *vpm = NULL;
@@ -209,19 +231,16 @@ int ocsp_main(int argc, char **argv)
     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
     int req_text = 0, resp_text = 0, ret = 1;
-#ifndef OPENSSL_NO_SOCK
     int req_timeout = -1;
-#endif
     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
     OPTION_CHOICE o;
-    char *prog;
 
     reqnames = sk_OPENSSL_STRING_new_null();
-    if (!reqnames)
+    if (reqnames == NULL)
         goto end;
     ids = sk_OCSP_CERTID_new_null();
-    if (!ids)
+    if (ids == NULL)
         goto end;
     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
         return 1;
@@ -435,6 +454,12 @@ int ocsp_main(int argc, char **argv)
             if (!opt_md(opt_arg(), &rsign_md))
                 goto end;
             break;
+        case OPT_RSIGOPT:
+            if (rsign_sigopts == NULL)
+                rsign_sigopts = sk_OPENSSL_STRING_new_null();
+            if (rsign_sigopts == NULL || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
+                goto end;
+            break;
         case OPT_HEADER:
             header = opt_arg();
             value = strchr(header, '=');
@@ -457,9 +482,13 @@ int ocsp_main(int argc, char **argv)
                 goto opthelp;
             trailing_md = 1;
             break;
+        case OPT_MULTI:
+# ifdef OCSP_DAEMON
+            multi = atoi(opt_arg());
+# endif
+            break;
         }
     }
-
     if (trailing_md) {
         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
                    prog);
@@ -470,62 +499,105 @@ int ocsp_main(int argc, char **argv)
         goto opthelp;
 
     /* Have we anything to do? */
-    if (!req && !reqin && !respin && !(port && ridx_filename))
+    if (req == NULL && reqin == NULL
+        && respin == NULL && !(port != NULL && ridx_filename != NULL))
         goto opthelp;
 
     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
     if (out == NULL)
         goto end;
 
-    if (!req && (add_nonce != 2))
+    if (req == NULL && (add_nonce != 2))
         add_nonce = 0;
 
-    if (!req && reqin) {
+    if (req == NULL && reqin != NULL) {
         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
         if (derbio == NULL)
             goto end;
         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
         BIO_free(derbio);
-        if (!req) {
+        if (req == NULL) {
             BIO_printf(bio_err, "Error reading OCSP request\n");
             goto end;
         }
     }
 
-    if (!req && port) {
+    if (req == NULL && port != NULL) {
         acbio = init_responder(port);
-        if (!acbio)
+        if (acbio == NULL)
             goto end;
     }
 
-    if (rsignfile) {
-        if (!rkeyfile)
+    if (rsignfile != NULL) {
+        if (rkeyfile == NULL)
             rkeyfile = rsignfile;
         rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
-        if (!rsigner) {
+        if (rsigner == NULL) {
             BIO_printf(bio_err, "Error loading responder certificate\n");
             goto end;
         }
-        rca_cert = load_cert(rca_filename, FORMAT_PEM, "CA certificate");
-        if (rcertfile) {
+        if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
+                        NULL, "CA certificate"))
+            goto end;
+        if (rcertfile != NULL) {
             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
                             "responder other certificates"))
                 goto end;
         }
         rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, NULL,
                         "responder private key");
-        if (!rkey)
+        if (rkey == NULL)
             goto end;
     }
-    if (acbio)
-        BIO_printf(bio_err, "Waiting for OCSP client connections...\n");
 
- redo_accept:
+    if (ridx_filename != NULL
+        && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
+        BIO_printf(bio_err,
+                   "Responder mode requires certificate, key, and CA.\n");
+        goto end;
+    }
 
-    if (acbio) {
-        if (!do_responder(&req, &cbio, acbio))
+    if (ridx_filename != NULL) {
+        rdb = load_index(ridx_filename, NULL);
+        if (rdb == NULL || index_index(rdb) <= 0) {
+            ret = 1;
             goto end;
-        if (!req) {
+        }
+    }
+
+# ifdef OCSP_DAEMON
+    if (multi && acbio != NULL)
+        spawn_loop();
+    if (acbio != NULL && req_timeout > 0)
+        signal(SIGALRM, sock_timeout);
+#endif
+
+    if (acbio != NULL)
+        log_message(LOG_INFO, "waiting for OCSP client connections...");
+
+redo_accept:
+
+    if (acbio != NULL) {
+# ifdef OCSP_DAEMON
+        if (index_changed(rdb)) {
+            CA_DB *newrdb = load_index(ridx_filename, NULL);
+
+            if (newrdb != NULL && index_index(newrdb) > 0) {
+                free_index(rdb);
+                rdb = newrdb;
+            } else {
+                free_index(newrdb);
+                log_message(LOG_ERR, "error reloading updated index: %s",
+                            ridx_filename);
+            }
+        }
+# endif
+
+        req = NULL;
+        if (!do_responder(&req, &cbio, acbio, req_timeout))
+            goto redo_accept;
+
+        if (req == NULL) {
             resp =
                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
                                      NULL);
@@ -534,30 +606,32 @@ int ocsp_main(int argc, char **argv)
         }
     }
 
-    if (!req && (signfile || reqout || host || add_nonce || ridx_filename)) {
+    if (req == NULL
+        && (signfile != NULL || reqout != NULL
+            || host != NULL || add_nonce || ridx_filename != NULL)) {
         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
         goto end;
     }
 
-    if (req && add_nonce)
+    if (req != NULL && add_nonce)
         OCSP_request_add1_nonce(req, NULL, -1);
 
-    if (signfile) {
-        if (!keyfile)
+    if (signfile != NULL) {
+        if (keyfile == NULL)
             keyfile = signfile;
         signer = load_cert(signfile, FORMAT_PEM, "signer certificate");
-        if (!signer) {
+        if (signer == NULL) {
             BIO_printf(bio_err, "Error loading signer certificate\n");
             goto end;
         }
-        if (sign_certfile) {
+        if (sign_certfile != NULL) {
             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL,
                             "signer certificates"))
                 goto end;
         }
         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
                        "signer private key");
-        if (!key)
+        if (key == NULL)
             goto end;
 
         if (!OCSP_request_sign
@@ -567,10 +641,10 @@ int ocsp_main(int argc, char **argv)
         }
     }
 
-    if (req_text && req)
+    if (req_text && req != NULL)
         OCSP_REQUEST_print(out, req, 0);
 
-    if (reqout) {
+    if (reqout != NULL) {
         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
         if (derbio == NULL)
             goto end;
@@ -578,43 +652,29 @@ int ocsp_main(int argc, char **argv)
         BIO_free(derbio);
     }
 
-    if (ridx_filename && (!rkey || !rsigner || !rca_cert)) {
-        BIO_printf(bio_err,
-                   "Need a responder certificate, key and CA for this operation!\n");
-        goto end;
-    }
-
-    if (ridx_filename && !rdb) {
-        rdb = load_index(ridx_filename, NULL);
-        if (!rdb)
-            goto end;
-        if (!index_index(rdb))
-            goto end;
-    }
-
-    if (rdb) {
-        make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey,
-                               rsign_md, rother, rflags, nmin, ndays, badsig);
-        if (cbio)
+    if (rdb != NULL) {
+        make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
+                               rsign_md, rsign_sigopts, rother, rflags, nmin, ndays, badsig);
+        if (cbio != NULL)
             send_ocsp_response(cbio, resp);
-    } else if (host) {
+    } else if (host != NULL) {
 # ifndef OPENSSL_NO_SOCK
         resp = process_responder(req, host, path,
                                  port, use_ssl, headers, req_timeout);
-        if (!resp)
+        if (resp == NULL)
             goto end;
 # else
         BIO_printf(bio_err,
                    "Error creating connect BIO - sockets not supported.\n");
         goto end;
 # endif
-    } else if (respin) {
+    } else if (respin != NULL) {
         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
         if (derbio == NULL)
             goto end;
         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
         BIO_free(derbio);
-        if (!resp) {
+        if (resp == NULL) {
             BIO_printf(bio_err, "Error reading OCSP response\n");
             goto end;
         }
@@ -625,7 +685,7 @@ int ocsp_main(int argc, char **argv)
 
  done_resp:
 
-    if (respout) {
+    if (respout != NULL) {
         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
         if (derbio == NULL)
             goto end;
@@ -637,16 +697,15 @@ int ocsp_main(int argc, char **argv)
     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
         BIO_printf(out, "Responder Error: %s (%d)\n",
                    OCSP_response_status_str(i), i);
-        if (ignore_err)
-            goto redo_accept;
-        goto end;
+        if (!ignore_err)
+                goto end;
     }
 
     if (resp_text)
         OCSP_RESPONSE_print(out, resp, 0);
 
     /* If running as responder don't verify our own response */
-    if (cbio) {
+    if (cbio != NULL) {
         /* If not unlimited, see if we took all we should. */
         if (accept_count != -1 && --accept_count <= 0) {
             ret = 0;
@@ -660,26 +719,26 @@ int ocsp_main(int argc, char **argv)
         resp = NULL;
         goto redo_accept;
     }
-    if (ridx_filename) {
+    if (ridx_filename != NULL) {
         ret = 0;
         goto end;
     }
 
-    if (!store) {
+    if (store == NULL) {
         store = setup_verify(CAfile, CApath, noCAfile, noCApath);
         if (!store)
             goto end;
     }
     if (vpmtouched)
         X509_STORE_set1_param(store, vpm);
-    if (verify_certfile) {
+    if (verify_certfile != NULL) {
         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
                         "validator certificate"))
             goto end;
     }
 
     bs = OCSP_response_get1_basic(resp);
-    if (!bs) {
+    if (bs == NULL) {
         BIO_printf(bio_err, "Error parsing response\n");
         goto end;
     }
@@ -687,7 +746,7 @@ int ocsp_main(int argc, char **argv)
     ret = 0;
 
     if (!noverify) {
-        if (req && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
+        if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
             if (i == -1)
                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
             else {
@@ -707,9 +766,9 @@ int ocsp_main(int argc, char **argv)
             BIO_printf(bio_err, "Response Verify Failure\n");
             ERR_print_errors(bio_err);
             ret = 1;
-        } else
+        } else {
             BIO_printf(bio_err, "Response verify OK\n");
-
+        }
     }
 
     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
@@ -719,16 +778,17 @@ int ocsp_main(int argc, char **argv)
     X509_free(signer);
     X509_STORE_free(store);
     X509_VERIFY_PARAM_free(vpm);
+    sk_OPENSSL_STRING_free(rsign_sigopts);
     EVP_PKEY_free(key);
     EVP_PKEY_free(rkey);
     X509_free(cert);
     sk_X509_pop_free(issuers, X509_free);
     X509_free(rsigner);
-    X509_free(rca_cert);
+    sk_X509_pop_free(rca_cert, X509_free);
     free_index(rdb);
     BIO_free_all(cbio);
     BIO_free_all(acbio);
-    BIO_free(out);
+    BIO_free_all(out);
     OCSP_REQUEST_free(req);
     OCSP_RESPONSE_free(resp);
     OCSP_BASICRESP_free(bs);
@@ -741,15 +801,195 @@ int ocsp_main(int argc, char **argv)
     OPENSSL_free(tport);
     OPENSSL_free(tpath);
 
-    return (ret);
+    return ret;
+}
+
+static void
+log_message(int level, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+# ifdef OCSP_DAEMON
+    if (multi) {
+        char buf[1024];
+        if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
+            syslog(level, "%s", buf);
+        }
+        if (level >= LOG_ERR)
+            ERR_print_errors_cb(print_syslog, &level);
+    }
+# endif
+    if (!multi) {
+        BIO_printf(bio_err, "%s: ", prog);
+        BIO_vprintf(bio_err, fmt, ap);
+        BIO_printf(bio_err, "\n");
+    }
+    va_end(ap);
+}
+
+# ifdef OCSP_DAEMON
+
+static int print_syslog(const char *str, size_t len, void *levPtr)
+{
+    int level = *(int *)levPtr;
+    int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
+
+    syslog(level, "%.*s", ilen, str);
+
+    return ilen;
 }
 
+static int index_changed(CA_DB *rdb)
+{
+    struct stat sb;
+
+    if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
+        if (rdb->dbst.st_mtime != sb.st_mtime
+            || rdb->dbst.st_ctime != sb.st_ctime
+            || rdb->dbst.st_ino != sb.st_ino
+            || rdb->dbst.st_dev != sb.st_dev) {
+            syslog(LOG_INFO, "index file changed, reloading");
+            return 1;
+        }
+    }
+    return 0;
+}
+
+static void killall(int ret, pid_t *kidpids)
+{
+    int i;
+
+    for (i = 0; i < multi; ++i)
+        if (kidpids[i] != 0)
+            (void)kill(kidpids[i], SIGTERM);
+    sleep(1);
+    exit(ret);
+}
+
+static int termsig = 0;
+
+static void noteterm (int sig)
+{
+    termsig = sig;
+}
+
+/*
+ * Loop spawning up to `multi` child processes, only child processes return
+ * from this function.  The parent process loops until receiving a termination
+ * signal, kills extant children and exits without returning.
+ */
+static void spawn_loop(void)
+{
+    pid_t *kidpids = NULL;
+    int status;
+    int procs = 0;
+    int i;
+
+    openlog(prog, LOG_PID, LOG_DAEMON);
+
+    if (setpgid(0, 0)) {
+        syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
+               strerror(errno));
+        exit(1);
+    }
+    kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
+    for (i = 0; i < multi; ++i)
+        kidpids[i] = 0;
+
+    signal(SIGINT, noteterm);
+    signal(SIGTERM, noteterm);
+
+    while (termsig == 0) {
+        pid_t fpid;
+
+        /*
+         * Wait for a child to replace when we're at the limit.
+         * Slow down if a child exited abnormally or waitpid() < 0
+         */
+        while (termsig == 0 && procs >= multi) {
+            if ((fpid = waitpid(-1, &status, 0)) > 0) {
+                for (i = 0; i < procs; ++i) {
+                    if (kidpids[i] == fpid) {
+                        kidpids[i] = 0;
+                        --procs;
+                        break;
+                    }
+                }
+                if (i >= multi) {
+                    syslog(LOG_ERR, "fatal: internal error: "
+                           "no matching child slot for pid: %ld",
+                           (long) fpid);
+                    killall(1, kidpids);
+                }
+                if (status != 0) {
+                    if (WIFEXITED(status))
+                        syslog(LOG_WARNING, "child process: %ld, exit status: %d",
+                               (long)fpid, WEXITSTATUS(status));
+                    else if (WIFSIGNALED(status))
+                        syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
+                               (long)fpid, WTERMSIG(status),
+#ifdef WCOREDUMP
+                               WCOREDUMP(status) ? " (core dumped)" :
+#endif
+                               "");
+                    sleep(1);
+                }
+                break;
+            } else if (errno != EINTR) {
+                syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
+                killall(1, kidpids);
+            }
+        }
+        if (termsig)
+            break;
+
+        switch(fpid = fork()) {
+        case -1:            /* error */
+            /* System critically low on memory, pause and try again later */
+            sleep(30);
+            break;
+        case 0:             /* child */
+            OPENSSL_free(kidpids);
+            signal(SIGINT, SIG_DFL);
+            signal(SIGTERM, SIG_DFL);
+            if (termsig)
+                _exit(0);
+            if (RAND_poll() <= 0) {
+                syslog(LOG_ERR, "fatal: RAND_poll() failed");
+                _exit(1);
+            }
+            return;
+        default:            /* parent */
+            for (i = 0; i < multi; ++i) {
+                if (kidpids[i] == 0) {
+                    kidpids[i] = fpid;
+                    procs++;
+                    break;
+                }
+            }
+            if (i >= multi) {
+                syslog(LOG_ERR, "fatal: internal error: no free child slots");
+                killall(1, kidpids);
+            }
+            break;
+        }
+    }
+
+    /* The loop above can only break on termsig */
+    OPENSSL_free(kidpids);
+    syslog(LOG_INFO, "terminating on signal: %d", termsig);
+    killall(0, kidpids);
+}
+# endif
+
 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
                          const EVP_MD *cert_id_md, X509 *issuer,
                          STACK_OF(OCSP_CERTID) *ids)
 {
     OCSP_CERTID *id;
-    if (!issuer) {
+
+    if (issuer == NULL) {
         BIO_printf(bio_err, "No issuer certificate specified\n");
         return 0;
     }
@@ -758,7 +998,7 @@ static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
     if (*req == NULL)
         goto err;
     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
-    if (!id || !sk_OCSP_CERTID_push(ids, id))
+    if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
         goto err;
     if (!OCSP_request_add0_id(*req, id))
         goto err;
@@ -777,7 +1017,8 @@ static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
     X509_NAME *iname;
     ASN1_BIT_STRING *ikey;
     ASN1_INTEGER *sno;
-    if (!issuer) {
+
+    if (issuer == NULL) {
         BIO_printf(bio_err, "No issuer certificate specified\n");
         return 0;
     }
@@ -788,7 +1029,7 @@ static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
     iname = X509_get_subject_name(issuer);
     ikey = X509_get0_pubkey_bitstr(issuer);
     sno = s2i_ASN1_INTEGER(NULL, serial);
-    if (!sno) {
+    if (sno == NULL) {
         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
         return 0;
     }
@@ -815,7 +1056,7 @@ static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
     int i, status, reason;
     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
 
-    if (!bs || !req || !sk_OPENSSL_STRING_num(names)
+    if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
         || !sk_OCSP_CERTID_num(ids))
         return;
 
@@ -862,16 +1103,19 @@ static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
     }
 }
 
-static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
-                              CA_DB *db, X509 *ca, X509 *rcert,
+static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
+                              CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
                               EVP_PKEY *rkey, const EVP_MD *rmd,
+                              STACK_OF(OPENSSL_STRING) *sigopts,
                               STACK_OF(X509) *rother, unsigned long flags,
                               int nmin, int ndays, int badsig)
 {
     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
-    OCSP_CERTID *cid, *ca_id = NULL;
+    OCSP_CERTID *cid;
     OCSP_BASICRESP *bs = NULL;
     int i, id_count;
+    EVP_MD_CTX *mctx = NULL;
+    EVP_PKEY_CTX *pkctx = NULL;
 
     id_count = OCSP_request_onereq_count(req);
 
@@ -891,6 +1135,8 @@ static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
         OCSP_ONEREQ *one;
         ASN1_INTEGER *serial;
         char **inf;
+        int jj;
+        int found = 0;
         ASN1_OBJECT *cert_id_md_oid;
         const EVP_MD *cert_id_md;
         one = OCSP_request_onereq_get0(req, i);
@@ -899,16 +1145,22 @@ static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
 
         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
-        if (!cert_id_md) {
+        if (cert_id_md == NULL) {
             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
                                          NULL);
             goto end;
         }
-        OCSP_CERTID_free(ca_id);
-        ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca);
+        for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
+            X509 *ca_cert = sk_X509_value(ca, jj);
+            OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
 
-        /* Is this request about our CA? */
-        if (OCSP_id_issuer_cmp(ca_id, cid)) {
+            if (OCSP_id_issuer_cmp(ca_id, cid) == 0)
+                found = 1;
+
+            OCSP_CERTID_free(ca_id);
+        }
+
+        if (!found) {
             OCSP_basic_add1_status(bs, cid,
                                    V_OCSP_CERTSTATUS_UNKNOWN,
                                    0, NULL, thisupd, nextupd);
@@ -916,15 +1168,15 @@ static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
         }
         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
         inf = lookup_serial(db, serial);
-        if (!inf)
+        if (inf == NULL) {
             OCSP_basic_add1_status(bs, cid,
                                    V_OCSP_CERTSTATUS_UNKNOWN,
                                    0, NULL, thisupd, nextupd);
-        else if (inf[DB_type][0] == DB_TYPE_VAL)
+        } else if (inf[DB_type][0] == DB_TYPE_VAL) {
             OCSP_basic_add1_status(bs, cid,
                                    V_OCSP_CERTSTATUS_GOOD,
                                    0, NULL, thisupd, nextupd);
-        else if (inf[DB_type][0] == DB_TYPE_REV) {
+        } else if (inf[DB_type][0] == DB_TYPE_REV) {
             ASN1_OBJECT *inst = NULL;
             ASN1_TIME *revtm = NULL;
             ASN1_GENERALIZEDTIME *invtm = NULL;
@@ -934,10 +1186,10 @@ static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
             single = OCSP_basic_add1_status(bs, cid,
                                             V_OCSP_CERTSTATUS_REVOKED,
                                             reason, revtm, thisupd, nextupd);
-            if (invtm)
+            if (invtm != NULL)
                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
                                              invtm, 0, 0);
-            else if (inst)
+            else if (inst != NULL)
                 OCSP_SINGLERESP_add1_ext_i2d(single,
                                              NID_hold_instruction_code, inst,
                                              0, 0);
@@ -949,7 +1201,23 @@ static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
 
     OCSP_copy_nonce(bs, req);
 
-    OCSP_basic_sign(bs, rcert, rkey, rmd, rother, flags);
+    mctx = EVP_MD_CTX_new();
+    if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
+        *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
+        goto end;
+    }
+    for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
+        char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
+
+        if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
+            BIO_printf(err, "parameter error \"%s\"\n", sigopt);
+            ERR_print_errors(bio_err);
+            *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
+                                         NULL);
+            goto end;
+        }
+    }
+    OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags);
 
     if (badsig) {
         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
@@ -959,9 +1227,9 @@ static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
 
  end:
+    EVP_MD_CTX_free(mctx);
     ASN1_TIME_free(thisupd);
     ASN1_TIME_free(nextupd);
-    OCSP_CERTID_free(ca_id);
     OCSP_BASICRESP_free(bs);
 }
 
@@ -1004,16 +1272,14 @@ static BIO *init_responder(const char *port)
     if (acbio == NULL
         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
         || BIO_set_accept_port(acbio, port) < 0) {
-        BIO_printf(bio_err, "Error setting up accept BIO\n");
-        ERR_print_errors(bio_err);
+        log_message(LOG_ERR, "Error setting up accept BIO");
         goto err;
     }
 
     BIO_set_accept_bios(acbio, bufbio);
     bufbio = NULL;
     if (BIO_do_accept(acbio) <= 0) {
-        BIO_printf(bio_err, "Error starting accept\n");
-        ERR_print_errors(bio_err);
+        log_message(LOG_ERR, "Error starting accept");
         goto err;
     }
 
@@ -1052,7 +1318,16 @@ static int urldecode(char *p)
 }
 # endif
 
-static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio)
+# ifdef OCSP_DAEMON
+static void sock_timeout(int signum)
+{
+    if (acfd != (int)INVALID_SOCKET)
+        (void)shutdown(acfd, SHUT_RD);
+}
+# endif
+
+static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
+                        int timeout)
 {
 # ifdef OPENSSL_NO_SOCK
     return 0;
@@ -1062,27 +1337,37 @@ static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio)
     char inbuf[2048], reqbuf[2048];
     char *p, *q;
     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
+    const char *client;
 
-    if (BIO_do_accept(acbio) <= 0) {
-        BIO_printf(bio_err, "Error accepting connection\n");
-        ERR_print_errors(bio_err);
+    *preq = NULL;
+
+    /* Connection loss before accept() is routine, ignore silently */
+    if (BIO_do_accept(acbio) <= 0)
         return 0;
-    }
 
     cbio = BIO_pop(acbio);
     *pcbio = cbio;
+    client = BIO_get_peer_name(cbio);
+
+#  ifdef OCSP_DAEMON
+    if (timeout > 0) {
+        (void) BIO_get_fd(cbio, &acfd);
+        alarm(timeout);
+    }
+#  endif
 
     /* Read the request line. */
     len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
     if (len <= 0)
-        return 1;
+        goto out;
+
     if (strncmp(reqbuf, "GET ", 4) == 0) {
         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
         for (p = reqbuf + 4; *p == ' '; ++p)
             continue;
         if (*p != '/') {
-            BIO_printf(bio_err, "Invalid request -- bad URL\n");
-            return 1;
+            log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
+            goto out;
         }
         p++;
 
@@ -1091,51 +1376,70 @@ static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio)
             if (*q == ' ')
                 break;
         if (strncmp(q, " HTTP/1.", 8) != 0) {
-            BIO_printf(bio_err, "Invalid request -- bad HTTP vesion\n");
-            return 1;
+            log_message(LOG_INFO,
+                        "Invalid request -- bad HTTP version: %s", client);
+            goto out;
         }
         *q = '\0';
+
+        /*
+         * Skip "GET / HTTP..." requests often used by load-balancers
+         */
+        if (p[1] == '\0')
+            goto out;
+
         len = urldecode(p);
         if (len <= 0) {
-            BIO_printf(bio_err, "Invalid request -- bad URL encoding\n");
-            return 1;
+            log_message(LOG_INFO,
+                        "Invalid request -- bad URL encoding: %s", client);
+            goto out;
         }
         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
-            BIO_printf(bio_err, "Could not allocate memory\n");
-            ERR_print_errors(bio_err);
-            return 1;
+            log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
+            goto out;
         }
         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
         getbio = BIO_push(b64, getbio);
     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
-        BIO_printf(bio_err, "Invalid request -- bad HTTP verb\n");
-        return 1;
+        log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
+        goto out;
     }
 
     /* Read and skip past the headers. */
     for (;;) {
         len = BIO_gets(cbio, inbuf, sizeof(inbuf));
         if (len <= 0)
-            return 1;
+            goto out;
         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
             break;
     }
 
+#  ifdef OCSP_DAEMON
+    /* Clear alarm before we close the client socket */
+    alarm(0);
+    timeout = 0;
+#  endif
+
     /* Try to read OCSP request */
-    if (getbio) {
+    if (getbio != NULL) {
         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
         BIO_free_all(getbio);
-    } else
+    } else {
         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
-
-    if (!req) {
-        BIO_printf(bio_err, "Error parsing OCSP request\n");
-        ERR_print_errors(bio_err);
     }
 
+    if (req == NULL)
+        log_message(LOG_ERR, "Error parsing OCSP request");
+
     *preq = req;
 
+out:
+#  ifdef OCSP_DAEMON
+    if (timeout > 0)
+        alarm(0);
+    acfd = (int)INVALID_SOCKET;
+#  endif
     return 1;
 # endif
 }
@@ -1145,7 +1449,7 @@ static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
     char http_resp[] =
         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
         "Content-Length: %d\r\n\r\n";
-    if (!cbio)
+    if (cbio == NULL)
         return 0;
     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
     i2d_OCSP_RESPONSE_bio(cbio, resp);
@@ -1223,11 +1527,11 @@ static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
         openssl_fdset(fd, &confds);
         tv.tv_usec = 0;
         tv.tv_sec = req_timeout;
-        if (BIO_should_read(cbio))
+        if (BIO_should_read(cbio)) {
             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
-        else if (BIO_should_write(cbio))
+        } else if (BIO_should_write(cbio)) {
             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
-        else {
+        } else {
             BIO_puts(bio_err, "Unexpected retry condition\n");
             goto err;
         }
@@ -1258,11 +1562,11 @@ OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
     OCSP_RESPONSE *resp = NULL;
 
     cbio = BIO_new_connect(host);
-    if (!cbio) {
+    if (cbio == NULL) {
         BIO_printf(bio_err, "Error creating connect BIO\n");
         goto end;
     }
-    if (port)
+    if (port != NULL)
         BIO_set_conn_port(cbio, port);
     if (use_ssl == 1) {
         BIO *sbio;
@@ -1277,7 +1581,7 @@ OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
     }
 
     resp = query_responder(cbio, host, path, headers, req, req_timeout);
-    if (!resp)
+    if (resp == NULL)
         BIO_printf(bio_err, "Error querying OCSP responder\n");
  end:
     BIO_free_all(cbio);