File _service:tar_scm:backport-upgrade-libpcre-to-PC... of Package nmap

File _service:tar_scm:backport-upgrade-libpcre-to-PCRE2-10.42.patch of Package nmap (Revision 86861514739c9fa57e7b9923abf0320d)

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From 828ab48764b82d0226e860c73c5dac5b11f77385 Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Sat, 24 Jun 2023 01:53:07 +0000
Subject: [PATCH] Upgrade libpcre to PCRE2 10.42. Windows/macOS builds not
 completed.

Conflict: Remove pcre2 source code modification, which can be replaced by pcre2-devel dependency
Reference: https://github.com/nmap/nmap/commit/828ab48764b82d0226e860c73c5dac5b11f77385
---
 checklibs.sh            |  10 +-
 configure               |  92 +++------
 configure.ac            |  23 +--
 nmap.cc                 |   6 +-
 nmap_config.h.in        |   2 -
 nping/nping_config.h.in |   2 -
 nse_pcrelib.cc          | 400 ----------------------------------------
 nse_pcrelib.h           |   9 -
 nselib/pcre.luadoc      | 135 --------------
 service_scan.cc         | 180 ++++++++++--------
 service_scan.h          |  33 ++--
 11 files changed, 156 insertions(+), 736 deletions(-)
 delete mode 100644 nse_pcrelib.cc
 delete mode 100644 nse_pcrelib.h
 delete mode 100644 nselib/pcre.luadoc

diff --git a/checklibs.sh b/checklibs.sh
index 2048e2a..26e9d8a 100644
--- a/checklibs.sh
+++ b/checklibs.sh
@@ -11,13 +11,13 @@ trim_version() {
 }
 
 check_libpcre() {
-    PCRE_SOURCE="https://sourceforge.net/projects/pcre/files/latest/download"
+    PCRE_SOURCE="https://github.com/PCRE2Project/pcre2/releases/latest"
     PCRE_MAJOR=""
     PCRE_MINOR=""
-    eval $(grep '^PCRE_MAJOR=' $NDIR/libpcre/configure)
-    eval $(grep '^PCRE_MINOR=' $NDIR/libpcre/configure)
-    PCRE_VERSION="$PCRE_MAJOR.$PCRE_MINOR"
-    PCRE_LATEST=$(curl -s -I $PCRE_SOURCE | perl -lne 'if(/pcre-(\d+.\d+).zip/){print $1}' | newest)
+    eval $(grep '^PCRE2_MAJOR=' $NDIR/libpcre/configure)
+    eval $(grep '^PCRE2_MINOR=' $NDIR/libpcre/configure)
+    PCRE_VERSION="$PCRE2_MAJOR.$PCRE2_MINOR"
+    PCRE_LATEST=$(curl -s -I $PCRE_SOURCE | tee tmp.txt | perl -lne 'if(m|^Location:.*/tag/pcre2-(\d+.\d+)[\r\n]*$|){print $1;exit(0)}')
     if [ "$PCRE_VERSION" != "$PCRE_LATEST" ]; then
         echo "Newer version of libpcre available"
         echo "  Current:" $PCRE_VERSION
diff --git a/configure b/configure
index d1d2f19..12764ee 100755
--- a/configure
+++ b/configure
@@ -1451,8 +1451,8 @@ Optional Packages:
                           [DIR]/lib/ and [DIR]/include/openssl/)
   --with-libpcap=DIR      Look for pcap in DIR/include and DIR/libs.
   --with-libpcap=included Always use version included with Nmap
-  --with-libpcre=DIR      Use an existing (compiled) pcre lib from DIR/include
-                          and DIR/lib.
+  --with-libpcre=DIR      Use an existing (compiled) pcre2 lib from
+                          DIR/include and DIR/lib.
   --with-libpcre=included Always use the version included with Nmap
   --with-libz=DIR         Use specific copy of libz
   --with-libz=included    Always use version included with Nmap
@@ -6437,58 +6437,19 @@ fi
 
 # If they didn't specify it, we try to find it
 if test $have_pcre != yes -a $requested_included_pcre != yes ; then
-  ac_fn_c_check_header_mongrel "$LINENO" "pcre.h" "ac_cv_header_pcre_h" "$ac_includes_default"
-if test "x$ac_cv_header_pcre_h" = xyes; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pcre_version in -lpcre" >&5
-$as_echo_n "checking for pcre_version in -lpcre... " >&6; }
-if ${ac_cv_lib_pcre_pcre_version+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpcre  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
+  ac_fn_c_check_header_compile "$LINENO" "pcre2.h" "ac_cv_header_pcre2_h" "
+#define PCRE2_CODE_UNIT_WIDTH 8
 
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char pcre_version ();
-int
-main ()
-{
-return pcre_version ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_pcre_pcre_version=yes
-else
-  ac_cv_lib_pcre_pcre_version=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pcre_pcre_version" >&5
-$as_echo "$ac_cv_lib_pcre_pcre_version" >&6; }
-if test "x$ac_cv_lib_pcre_pcre_version" = xyes; then :
-  have_pcre=yes
-fi
 
-else
-  ac_fn_c_check_header_mongrel "$LINENO" "pcre/pcre.h" "ac_cv_header_pcre_pcre_h" "$ac_includes_default"
-if test "x$ac_cv_header_pcre_pcre_h" = xyes; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pcre_version in -lpcre" >&5
-$as_echo_n "checking for pcre_version in -lpcre... " >&6; }
-if ${ac_cv_lib_pcre_pcre_version+:} false; then :
+"
+if test "x$ac_cv_header_pcre2_h" = xyes; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pcre2_compile_8 in -lpcre2-8" >&5
+$as_echo_n "checking for pcre2_compile_8 in -lpcre2-8... " >&6; }
+if ${ac_cv_lib_pcre2_8_pcre2_compile_8+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpcre  $LIBS"
+LIBS="-lpcre2-8  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -6498,35 +6459,30 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 #ifdef __cplusplus
 extern "C"
 #endif
-char pcre_version ();
+char pcre2_compile_8 ();
 int
 main ()
 {
-return pcre_version ();
+return pcre2_compile_8 ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_pcre_pcre_version=yes
+  ac_cv_lib_pcre2_8_pcre2_compile_8=yes
 else
-  ac_cv_lib_pcre_pcre_version=no
+  ac_cv_lib_pcre2_8_pcre2_compile_8=no
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pcre_pcre_version" >&5
-$as_echo "$ac_cv_lib_pcre_pcre_version" >&6; }
-if test "x$ac_cv_lib_pcre_pcre_version" = xyes; then :
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pcre2_8_pcre2_compile_8" >&5
+$as_echo "$ac_cv_lib_pcre2_8_pcre2_compile_8" >&6; }
+if test "x$ac_cv_lib_pcre2_8_pcre2_compile_8" = xyes; then :
   have_pcre=yes
 fi
 
-
-fi
-
-
-
 fi
 
 
@@ -6536,8 +6492,8 @@ fi
 if test $have_pcre != yes ; then
   subdirs="$subdirs libpcre"
 
-  CPPFLAGS="-I\$(top_srcdir)/$LIBPCREDIR $CPPFLAGS"
-  LIBPCRE_LIBS="$LIBPCREDIR/libpcre.a"
+  CPPFLAGS="-I\$(top_srcdir)/$LIBPCREDIR/src $CPPFLAGS"
+  LIBPCRE_LIBS="$LIBPCREDIR/.libs/libpcre2-8.a"
   PCRE_BUILD="build-pcre"
   PCRE_CLEAN="clean-pcre"
   PCRE_DIST_CLEAN="distclean-pcre"
@@ -6546,19 +6502,19 @@ $as_echo "#define PCRE_INCLUDED 1" >>confdefs.h
 
 else
 # We only need to check for and use this if we are NOT using included pcre
-  for ac_header in pcre/pcre.h
+  for ac_header in pcre2.h
 do :
-  ac_fn_c_check_header_mongrel "$LINENO" "pcre/pcre.h" "ac_cv_header_pcre_pcre_h" "$ac_includes_default"
-if test "x$ac_cv_header_pcre_pcre_h" = xyes; then :
+  ac_fn_c_check_header_mongrel "$LINENO" "pcre2.h" "ac_cv_header_pcre2_h" "$ac_includes_default"
+if test "x$ac_cv_header_pcre2_h" = xyes; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_PCRE_PCRE_H 1
+#define HAVE_PCRE2_H 1
 _ACEOF
 
 fi
 
 done
 
-  LIBPCRE_LIBS="-lpcre"
+  LIBPCRE_LIBS="-lpcre2-8"
   PCRE_BUILD=""
   PCRE_CLEAN=""
   PCRE_DIST_CLEAN=""
diff --git a/configure.ac b/configure.ac
index 7835d9b..c25fb04 100644
--- a/configure.ac
+++ b/configure.ac
@@ -510,7 +510,7 @@ LIBPCREDIR=libpcre
 
 # First we test whether they specified libpcre explicitly
 AC_ARG_WITH(libpcre,
-AC_HELP_STRING([--with-libpcre=DIR], [Use an existing (compiled) pcre lib from DIR/include and DIR/lib.])
+AC_HELP_STRING([--with-libpcre=DIR], [Use an existing (compiled) pcre2 lib from DIR/include and DIR/lib.])
 AC_HELP_STRING([--with-libpcre=included], [Always use the version included with Nmap]),
 [  case "$with_libpcre" in
   yes)
@@ -528,27 +528,28 @@ AC_HELP_STRING([--with-libpcre=included], [Always use the version included with
 
 # If they didn't specify it, we try to find it
 if test $have_pcre != yes -a $requested_included_pcre != yes ; then
-  AC_CHECK_HEADER(pcre.h,
-    AC_CHECK_LIB(pcre, pcre_version, [have_pcre=yes ]),
-    [AC_CHECK_HEADER(pcre/pcre.h,
-      [AC_CHECK_LIB(pcre, pcre_version, [have_pcre=yes])]
-    )]
+  AC_CHECK_HEADER(pcre2.h,
+    AC_CHECK_LIB(pcre2-8, pcre2_compile_8, [have_pcre=yes ]),
+    [],
+    [
+#define PCRE2_CODE_UNIT_WIDTH 8
+     ]
   )
 fi
 
 # If we still don't have it, we use our own
 if test $have_pcre != yes ; then
   AC_CONFIG_SUBDIRS( libpcre )
-  CPPFLAGS="-I\$(top_srcdir)/$LIBPCREDIR $CPPFLAGS"
-  LIBPCRE_LIBS="$LIBPCREDIR/libpcre.a"
+  CPPFLAGS="-I\$(top_srcdir)/$LIBPCREDIR/src $CPPFLAGS"
+  LIBPCRE_LIBS="$LIBPCREDIR/.libs/libpcre2-8.a"
   PCRE_BUILD="build-pcre"
   PCRE_CLEAN="clean-pcre"
   PCRE_DIST_CLEAN="distclean-pcre"
-  AC_DEFINE(PCRE_INCLUDED, 1, [Using included libpcre])
+  AC_DEFINE(PCRE_INCLUDED, 1, [Using included libpcre2])
 else
 # We only need to check for and use this if we are NOT using included pcre
-  AC_CHECK_HEADERS(pcre/pcre.h)
-  LIBPCRE_LIBS="-lpcre"
+  AC_CHECK_HEADERS(pcre2.h)
+  LIBPCRE_LIBS="-lpcre2-8"
   PCRE_BUILD=""
   PCRE_CLEAN=""
   PCRE_DIST_CLEAN=""
diff --git a/nmap.cc b/nmap.cc
index e4c65e7..96f0230 100644
--- a/nmap.cc
+++ b/nmap.cc
@@ -2803,10 +2803,12 @@ static void display_nmap_version() {
   without.push_back("libz");
 #endif
 
+  char pcre2_version[255];
+  pcre2_config(PCRE2_CONFIG_VERSION, pcre2_version);
 #ifdef PCRE_INCLUDED
-  with.push_back(std::string("nmap-libpcre-") + get_word_or_quote(pcre_version(), 0));
+  with.push_back(std::string("nmap-libpcre2-") + get_word_or_quote(pcre2_version, 0));
 #else
-  with.push_back(std::string("libpcre-") + get_word_or_quote(pcre_version(), 0));
+  with.push_back(std::string("libpcre2-") + get_word_or_quote(pcre2_version, 0));
 #endif
 
 #ifdef WIN32
diff --git a/nmap_config.h.in b/nmap_config.h.in
index 67dbeda..1dae65a 100644
--- a/nmap_config.h.in
+++ b/nmap_config.h.in
@@ -103,8 +103,6 @@
 
 #undef HAVE_TERMIOS_H
 
-#undef HAVE_PCRE_PCRE_H
-
 #undef BSD_NETWORKING
 
 #undef IN_ADDR_DEEPSTRUCT
diff --git a/nping/nping_config.h.in b/nping/nping_config.h.in
index 98638cb..9b6f971 100644
--- a/nping/nping_config.h.in
+++ b/nping/nping_config.h.in
@@ -101,8 +101,6 @@
 
 #undef HAVE_TERMIOS_H
 
-#undef HAVE_PCRE_PCRE_H
-
 #undef BSD_NETWORKING
 
 #undef IN_ADDR_DEEPSTRUCT
diff --git a/nse_pcrelib.cc b/nse_pcrelib.cc
deleted file mode 100644
index 436697e..0000000
--- a/nse_pcrelib.cc
+++ /dev/null
@@ -1,400 +0,0 @@
-/* lrexlib.c - PCRE regular expression library */
-/* Reuben Thomas   nov00-18dec04 */
-/* Shmuel Zeigerman   may04-18dec04 */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "nse_lua.h"
-
-#include <locale.h>
-
-#include <nbase.h>
-
-#ifdef HAVE_PCRE_PCRE_H
-# include <pcre/pcre.h>
-#else
-# include <pcre.h>
-#endif
-
-#include "nse_pcrelib.h"
-
-static int get_startoffset(lua_State *L, int stackpos, size_t len)
-{
-        int startoffset = luaL_optinteger(L, stackpos, 1);
-        if(startoffset > 0)
-                startoffset--;
-        else if(startoffset < 0) {
-                startoffset += (int) len;
-                if(startoffset < 0)
-                        startoffset = 0;
-        }
-        return startoffset;
-}
-
-static int udata_tostring (lua_State *L, const char* type_handle,
-                const char* type_name)
-{
-        char buf[256];
-        void *udata = luaL_checkudata(L, 1, type_handle);
-
-        if(udata) {
-                (void)Snprintf(buf, 255, "%s (%p)", type_name, udata);
-                lua_pushstring(L, buf);
-        }
-        else {
-                (void)Snprintf(buf, 255, "must be userdata of type '%s'", type_name);
-                (void)luaL_argerror(L, 1, buf);
-        }
-
-        free(udata);
-        return 1;
-}
-
-typedef struct { const char* key; lua_Integer val; } flags_pair;
-
-static int get_flags (lua_State *L, const flags_pair *arr)
-{
-        const flags_pair *p;
-        lua_newtable(L);
-        for(p=arr; p->key != NULL; p++) {
-                lua_pushstring(L, p->key);
-                lua_pushinteger(L, p->val);
-                lua_rawset(L, -3);
-        }
-        return 1;
-}
-
-const char pcre_handle[] = "pcre_regex_handle";
-const char pcre_typename[] = "pcre_regex";
-
-typedef struct {
-        pcre *pr;
-        pcre_extra *extra;
-        int *match;
-        int ncapt;
-        const unsigned char *tables;
-} pcre2;      /* a better name is needed */
-
-static const unsigned char *Lpcre_maketables(lua_State *L, int stackpos)
-{
-        const unsigned char *tables;
-        char old_locale[256];
-        char *locale = strdup(luaL_checkstring(L, stackpos));
-
-        if(locale == NULL)
-                luaL_error(L, "cannot set locale");
-
-        strncpy(old_locale, setlocale(LC_CTYPE, NULL), 255); /* store the locale */
-
-        if(setlocale(LC_CTYPE, locale) == NULL)        /* set new locale */
-                luaL_error(L, "cannot set locale");
-
-        tables = pcre_maketables();              /* make tables with new locale */
-        (void)setlocale(LC_CTYPE, old_locale);         /* restore the old locale */
-
-        free(locale);
-        return tables;
-}
-
-static int Lpcre_comp(lua_State *L)
-{
-        char buf[256];
-        const char *error;
-        int erroffset;
-        pcre2 *ud;
-        const char *pattern = luaL_checkstring(L, 1);
-        int cflags = luaL_optinteger(L, 2, 0);
-        const unsigned char *tables = NULL;
-
-        if(lua_gettop(L) > 2 && !lua_isnil(L, 3))
-                tables = Lpcre_maketables(L, 3);
-        if(tables == NULL)
-                luaL_error(L, "PCRE compilation failed");
-
-        ud = (pcre2*)lua_newuserdata(L, sizeof(pcre2));
-        luaL_getmetatable(L, pcre_handle);
-        (void)lua_setmetatable(L, -2);
-        ud->match = NULL;
-        ud->extra = NULL;
-        ud->tables = tables; /* keep this for eventual freeing */
-
-        ud->pr = pcre_compile(pattern, cflags, &error, &erroffset, tables);
-        if(!ud->pr) {
-                (void)Snprintf(buf, 255, "%s (pattern offset: %d)", error, erroffset+1);
-                /* show offset 1-based as it's common in Lua */
-                luaL_error(L, buf);
-        }
-
-        ud->extra = pcre_study(ud->pr, 0, &error);
-        if(error) luaL_error(L, error);
-
-        pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_CAPTURECOUNT, &ud->ncapt);
-        /* need (2 ints per capture, plus one for substring match) * 3/2 */
-        ud->match = (int *) safe_malloc((ud->ncapt + 1) * 3 * sizeof(int));
-
-        return 1;
-}
-
-static void Lpcre_getargs(lua_State *L, pcre2 **pud, const char **text,
-                size_t *text_len)
-{
-        *pud = (pcre2 *)luaL_checkudata(L, 1, pcre_handle);
-        if(*pud == NULL)
-                (void)luaL_argerror(L, 1, ("compiled regexp expected"));
-        *text = luaL_checklstring(L, 2, text_len);
-}
-
-typedef void (*Lpcre_push_matches) (lua_State *L, const char *text, pcre2 *ud);
-
-static void Lpcre_push_substrings (lua_State *L, const char *text, pcre2 *ud)
-{
-        unsigned int i, j;
-        unsigned int namecount;
-        unsigned char *name_table;
-        int name_entry_size;
-        unsigned char *tabptr;
-        const int *match = ud->match;
-
-        lua_newtable(L);
-        for (i = 1; i <= (unsigned) ud->ncapt; i++) {
-                j = i * 2;
-                if (match[j] >= 0)
-                        lua_pushlstring(L, text + match[j], (size_t)(match[j + 1] - match[j]));
-                else
-                        lua_pushboolean(L, 0);
-                lua_rawseti(L, -2, i);
-        }
-
-        /* now do named subpatterns - NJG */
-        (void)pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_NAMECOUNT, &namecount);
-        if (namecount <= 0)
-                return;
-        (void)pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_NAMETABLE, &name_table);
-        (void)pcre_fullinfo(ud->pr, ud->extra, PCRE_INFO_NAMEENTRYSIZE, &name_entry_size);
-        tabptr = name_table;
-        for (i = 0; i < namecount; i++) {
-                unsigned int n = (tabptr[0] << 8) | tabptr[1]; /* number of the capturing parenthesis */
-                if (n > 0 && n <= (unsigned) ud->ncapt) {   /* check range */
-                        unsigned int j = n * 2;
-                        lua_pushstring(L, (char*)tabptr + 2); /* name of the capture, zero terminated */
-                        if (match[j] >= 0)
-                                lua_pushlstring(L, text + match[j], match[j + 1] - match[j]);
-                        else
-                                lua_pushboolean(L, 0);
-                        lua_rawset(L, -3);
-                }
-                tabptr += name_entry_size;
-        }
-}
-
-static void Lpcre_push_offsets (lua_State *L, const char *text, pcre2 * ud)
-{
-        unsigned int i, j, k;
-        if(text) {
-                /* suppress compiler warning */
-        }
-        lua_newtable(L);
-        for (i=1, j=1; i <= (unsigned) ud->ncapt; i++) {
-                k = i * 2;
-                if (ud->match[k] >= 0) {
-                        lua_pushinteger(L, ud->match[k] + 1);
-                        lua_rawseti(L, -2, j++);
-                        lua_pushinteger(L, ud->match[k+1]);
-                        lua_rawseti(L, -2, j++);
-                }
-                else {
-                        lua_pushboolean(L, 0);
-                        lua_rawseti(L, -2, j++);
-                        lua_pushboolean(L, 0);
-                        lua_rawseti(L, -2, j++);
-                }
-        }
-}
-
-static int Lpcre_match_generic(lua_State *L, Lpcre_push_matches push_matches)
-{
-        int res;
-        const char *text;
-        pcre2 *ud;
-        size_t elen;
-        int startoffset;
-        int eflags = luaL_optinteger(L, 4, 0);
-
-        Lpcre_getargs(L, &ud, &text, &elen);
-        startoffset = get_startoffset(L, 3, elen);
-
-        res = pcre_exec(ud->pr, ud->extra, text, (int)elen, startoffset, eflags,
-                        ud->match, (ud->ncapt + 1) * 3);
-        if (res >= 0) {
-                lua_pushinteger(L, (lua_Number) ud->match[0] + 1);
-                lua_pushinteger(L, (lua_Number) ud->match[1]);
-                (*push_matches)(L, text, ud);
-                return 3;
-        }
-        return 0;
-}
-
-static int Lpcre_match(lua_State *L)
-{
-        return Lpcre_match_generic(L, Lpcre_push_substrings);
-}
-
-static int Lpcre_exec(lua_State *L)
-{
-        return Lpcre_match_generic(L, Lpcre_push_offsets);
-}
-
-static int Lpcre_gmatch(lua_State *L)
-{
-        int res;
-        size_t len;
-        int nmatch = 0, limit = 0;
-        const char *text;
-        pcre2 *ud;
-        int maxmatch = luaL_optinteger(L, 4, 0);
-        int eflags = luaL_optinteger(L, 5, 0);
-        int startoffset = 0;
-        Lpcre_getargs(L, &ud, &text, &len);
-        luaL_checktype(L, 3, LUA_TFUNCTION);
-
-        if(maxmatch > 0) /* this must be stated in the docs */
-                limit = 1;
-
-        while (!limit || nmatch < maxmatch) {
-                res = pcre_exec(ud->pr, ud->extra, text, (int)len, startoffset, eflags,
-                                ud->match, (ud->ncapt + 1) * 3);
-                if (res >= 0) {
-                        nmatch++;
-                        lua_pushvalue(L, 3);
-                        lua_pushlstring(L, text + ud->match[0], ud->match[1] - ud->match[0]);
-                        Lpcre_push_substrings(L, text, ud);
-                        lua_call(L, 2, 1);
-                        if(lua_toboolean(L, -1))
-                                break;
-                        lua_pop(L, 1);
-                        startoffset = ud->match[1];
-                } else
-                        break;
-        }
-        lua_pushinteger(L, nmatch);
-        return 1;
-}
-
-static int Lpcre_gc (lua_State *L)
-{
-        pcre2 *ud = (pcre2 *)luaL_checkudata(L, 1, pcre_handle);
-        if (ud) {
-                if(ud->pr)      pcre_free(ud->pr);
-                if(ud->extra)   pcre_free(ud->extra);
-                if(ud->tables)  pcre_free((void *)ud->tables);
-                if(ud->match)   free(ud->match);
-        }
-        return 0;
-}
-
-static int Lpcre_tostring (lua_State *L) {
-        return udata_tostring(L, pcre_handle, pcre_typename);
-}
-
-static int Lpcre_vers (lua_State *L)
-{
-        lua_pushstring(L, pcre_version());
-        return 1;
-}
-
-static flags_pair pcre_flags[] =
-{
-        { "CASELESS",        PCRE_CASELESS },
-        { "MULTILINE",       PCRE_MULTILINE },
-        { "DOTALL",          PCRE_DOTALL },
-        { "EXTENDED",        PCRE_EXTENDED },
-        { "ANCHORED",        PCRE_ANCHORED },
-        { "DOLLAR_ENDONLY",  PCRE_DOLLAR_ENDONLY },
-        { "EXTRA",           PCRE_EXTRA },
-        { "NOTBOL",          PCRE_NOTBOL },
-        { "NOTEOL",          PCRE_NOTEOL },
-        { "UNGREEDY",        PCRE_UNGREEDY },
-        { "NOTEMPTY",        PCRE_NOTEMPTY },
-        { "UTF8",            PCRE_UTF8 },
-#if PCRE_MAJOR >= 4
-        { "NO_AUTO_CAPTURE", PCRE_NO_AUTO_CAPTURE },
-        { "NO_UTF8_CHECK",   PCRE_NO_UTF8_CHECK },
-#endif
-#ifdef PCRE_AUTO_CALLOUT
-        { "AUTO_CALLOUT",    PCRE_AUTO_CALLOUT },
-#endif
-#ifdef PCRE_PARTIAL
-        { "PARTIAL",         PCRE_PARTIAL },
-#endif
-#ifdef PCRE_DFA_SHORTEST
-        { "DFA_SHORTEST",    PCRE_DFA_SHORTEST },
-#endif
-#ifdef PCRE_DFA_RESTART
-        { "DFA_RESTART",     PCRE_DFA_RESTART },
-#endif
-#ifdef PCRE_FIRSTLINE
-        { "FIRSTLINE",       PCRE_FIRSTLINE },
-#endif
-#ifdef PCRE_DUPNAMES
-        { "DUPNAMES",        PCRE_DUPNAMES },
-#endif
-#ifdef PCRE_NEWLINE_CR
-        { "NEWLINE_CR",      PCRE_NEWLINE_CR },
-#endif
-#ifdef PCRE_NEWLINE_LF
-        { "NEWLINE_LF",      PCRE_NEWLINE_LF },
-#endif
-#ifdef PCRE_NEWLINE_CRLF
-        { "NEWLINE_CRLF",    PCRE_NEWLINE_CRLF },
-#endif
-#ifdef PCRE_NEWLINE_ANY
-        { "NEWLINE_ANY",     PCRE_NEWLINE_ANY },
-#endif
-#ifdef PCRE_NEWLINE_ANYCRLF
-        { "NEWLINE_ANYCRLF", PCRE_NEWLINE_ANYCRLF },
-#endif
-#ifdef PCRE_BSR_ANYCRLF
-        { "BSR_ANYCRLF",     PCRE_BSR_ANYCRLF },
-#endif
-#ifdef PCRE_BSR_UNICODE
-        { "BSR_UNICODE",     PCRE_BSR_UNICODE },
-#endif
-        { NULL, 0 }
-};
-
-static int Lpcre_get_flags (lua_State *L) {
-        return get_flags(L, pcre_flags);
-}
-
-static const luaL_Reg pcremeta[] = {
-        {"exec",       Lpcre_exec},
-        {"match",      Lpcre_match},
-        {"gmatch",     Lpcre_gmatch},
-        {"__gc",       Lpcre_gc},
-        {"__tostring", Lpcre_tostring},
-        {NULL, NULL}
-};
-
-/* Open the library */
-static const luaL_Reg pcrelib[] = {
-        {"new",	Lpcre_comp},
-        {"flags", Lpcre_get_flags},
-        {"version", Lpcre_vers},
-        {NULL, NULL}
-};
-
-LUALIB_API int luaopen_pcrelib(lua_State *L)
-{
-        luaL_newmetatable(L, pcre_handle);
-        lua_pushliteral(L, "__index");
-        luaL_newlib(L, pcremeta);
-        lua_rawset(L, -3);
-        lua_pop(L, 1);
-
-        luaL_newlib(L, pcrelib);
-
-        return 1;
-}
diff --git a/nse_pcrelib.h b/nse_pcrelib.h
deleted file mode 100644
index 512d2a8..0000000
--- a/nse_pcrelib.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef NSE_PCRELIB
-#define NSE_PCRELIB
-
-#define NSE_PCRELIBNAME "pcre"
-
-LUALIB_API int luaopen_pcrelib (lua_State *L);
-
-#endif
-
diff --git a/nselib/pcre.luadoc b/nselib/pcre.luadoc
deleted file mode 100644
index c442a96..0000000
--- a/nselib/pcre.luadoc
+++ /dev/null
@@ -1,135 +0,0 @@
----
--- Perl Compatible Regular Expressions.
---
--- One of Lua's quirks is its string patterns. While they have great performance
--- and are tightly integrated into the Lua interpreter, they are very different
--- in syntax and not as powerful as standard regular expressions.  So we have
--- integrated Perl compatible regular expressions into Lua using PCRE and a
--- modified version of the Lua PCRE library written by Reuben Thomas and Shmuel
--- Zeigerman. These are the same sort of regular expressions used by Nmap
--- version detection.  The main modification to their library is that the NSE
--- version only supports PCRE expressions instead of both PCRE and POSIX
--- patterns. In order to maintain a high script execution speed, the library
--- interfacing with PCRE is kept very thin. It is not integrated as seamlessly
--- as the Lua string pattern API. This allows script authors to decide when to
--- use PCRE expressions versus Lua patterns.  The use of PCRE involves a
--- separate pattern compilation step, which saves execution time when patterns
--- are reused.  Compiled patterns can be cached in the NSE registry and reused
--- by other scripts.
---
--- The documentation for this module is derived from that supplied by the PCRE
--- Lua lib.
---
--- Warning: PCRE has a history of security vulnerabilities allowing attackers
--- who are able to compile arbitrary regular expressions to execute arbitrary
--- code.  More such vulnerabilities may be discovered in the future.  These have
--- never affected Nmap because it doesn't give attackers any control over the
--- regular expressions it uses.  Similarly, NSE scripts should never build
--- regular expressions with untrusted network input.  Matching hardcoded regular
--- expressions against the untrusted input is fine.
--- @author Reuben Thomas
--- @author Shmuel Zeigerman
-
-module "pcre"
-
---- Returns a compiled regular expression.
---
--- The resulting compiled regular expression is ready to be matched against
--- strings. Compiled regular expressions are subject to Lua's garbage
--- collection.
---
--- The compilation flags are set bitwise. If you want to set the 3rd
--- (corresponding to the number 4) and the 1st (corresponding to 1) bit for
--- example you would pass the number 5 as a second argument. The compilation
--- flags accepted are those of the PCRE C library. These include flags for case
--- insensitive matching (<code>1</code>), matching line beginnings
--- (<code>^</code>) and endings (<code>$</code>) even in multiline strings
--- (i.e. strings containing newlines) (<code>2</code>) and a flag for matching
--- across line boundaries (<code>4</code>). No compilation flags yield a
--- default value of <code>0</code>.
--- @param pattern a string describing the pattern, such as <code>"^foo$"</code>.
--- @param flags a number describing which compilation flags are set.
--- @param locale a string describing the locale which should be used to compile
--- the regular expression (optional). The value is a string which is passed to
--- the C standard library function <code>setlocale</code>.  For more
--- information on this argument refer to the documentation of
--- <code>setlocale</code>.
--- @usage local regex = pcre.new("pcre-pattern",0,"C")
-function new(pattern, flags, locale)
-
---- Returns a table of the available PCRE option flags (numbers) keyed by their
--- names (strings).
---
--- Possible names of the available strings can be retrieved from the
--- documentation of the PCRE library used to link against Nmap. The key is the
--- option name in the manual minus the <code>PCRE_</code> prefix.
--- <code>PCRE_CASELESS</code> becomes <code>CASELESS</code> for example.
-function flags()
-
---- Returns the version of the PCRE library in use as a string.
---
--- For example <code>"6.4 05-Sep-2005"</code>.
-function version()
-
---- Matches a string against a compiled regular expression.
---
--- Returns the start point and the end point of the first match of the compiled
--- regular expression in the string.
--- @param string the string to match against.
--- @param start where to start the match in the string (optional).
--- @param flags execution flags (optional).
--- @return <code>nil</code> if no match, otherwise the start point of the first
--- match.
--- @return the end point of the first match.
--- @return a table which contains false in the positions where the pattern did
--- not match. If named sub-patterns were used, the table also contains substring
--- matches keyed by their sub-pattern name.
--- @usage
--- i, j = regex:match("string to be searched", 0, 0)
--- if (i) then ... end
-function match(string, start, flags)
-
---- Matches a string against a compiled regular expression, returning positions
--- of substring matches.
---
--- This function is like <code>match</code> except that a table returned as a
--- third result contains offsets of substring matches rather than substring
--- matches themselves. That table will not contain string keys, even if named
--- sub-patterns are used.  For example, if the whole match is at offsets 10, 20
--- and substring matches are at offsets 12, 14 and 16, 19 then the function
--- returns <code>10, 20, {12,14,16,19}</code>.
--- @param string the string to match against.
--- @param start where to start the match in the string (optional).
--- @param flags execution flags (optional).
--- @return <code>nil</code> if no match, otherwise the start point of the match
--- of the whole string.
--- @return the end point of the match of the whole string.
--- @return a table containing a list of substring match start and end positions.
--- @usage
--- i, j, substrings = regex:exec("string to be searched", 0, 0)
--- if (i) then ... end
-function exec(string, start, flags)
-
---- Matches a string against a regular expression multiple times.
---
--- Tries to match the regular expression pcre_obj against string up to
--- <code>n</code> times (or as many as possible if <code>n</code> is not given
--- or is not a positive number), subject to the execution flags
--- <code>ef</code>. Each time there is a match, <code>func</code> is called as
--- <code>func(m, t)</code>, where <code>m</code> is the matched string and
--- <code>t</code> is a table of substring matches. This table contains false in
--- the positions where the corresponding sub-pattern did not match. If named
--- sub-patterns are used then the table also contains substring matches keyed
--- by their correspondent sub-pattern names (strings).  If <code>func</code>
--- returns a true value, then <code>gmatch</code> immediately returns;
--- <code>gmatch</code> returns the number of matches made.
--- @param string the string to match against.
--- @param func the function to call for each match.
--- @param n the maximum number of matches to do (optional).
--- @param ef execution flags (optional).
--- @return the number of matches made.
--- @usage
--- local t = {}
--- local function match(m) t[#t + 1] = m end
--- local n = regex:gmatch("string to be searched", match)
-function pcre_obj:gmatch(string, func, n, ef)
diff --git a/service_scan.cc b/service_scan.cc
index cf13d8b..473b3a6 100644
--- a/service_scan.cc
+++ b/service_scan.cc
@@ -250,7 +250,7 @@ ServiceProbeMatch::ServiceProbeMatch() {
   product_template = version_template = info_template = NULL;
   hostname_template = ostype_template = devicetype_template = NULL;
   regex_compiled = NULL;
-  regex_extra = NULL;
+  match_data = NULL;
   isInitialized = false;
   matchops_ignorecase = false;
   matchops_dotall = false;
@@ -269,8 +269,21 @@ ServiceProbeMatch::~ServiceProbeMatch() {
   if (devicetype_template) free(devicetype_template);
   for (it = cpe_templates.begin(); it != cpe_templates.end(); it++)
     free(*it);
-  if (regex_compiled) pcre_free(regex_compiled);
-  if (regex_extra) pcre_free(regex_extra);
+  if (regex_compiled)
+  {
+    pcre2_code_free(regex_compiled);
+    regex_compiled=NULL;
+  }
+  if (match_data)
+  {
+    pcre2_match_data_free(match_data);
+    match_data=NULL;
+  }
+  if (match_context)
+  {
+    pcre2_match_context_free(match_context);
+    match_context=NULL;
+  }
   isInitialized = false;
 }
 
@@ -350,9 +363,9 @@ void ServiceProbeMatch::InitMatch(const char *matchtext, int lineno) {
   char *tmptemplate;
   char modestr[4];
   char flags[4];
-  int pcre_compile_ops = 0;
-  const char *pcre_errptr = NULL;
-  int pcre_erroffset = 0;
+  int pcre2_compile_ops = 0;
+  int pcre2_errcode;
+  PCRE2_SIZE  pcre2_erroffset;
   char **curr_tmp = NULL;
 
   if (isInitialized) fatal("Sorry ... %s does not yet support reinitializion", __func__);
@@ -405,41 +418,42 @@ void ServiceProbeMatch::InitMatch(const char *matchtext, int lineno) {
 
   // Next we compile and study the regular expression to match
   if (matchops_ignorecase)
-    pcre_compile_ops |= PCRE_CASELESS;
+    pcre2_compile_ops |= PCRE2_CASELESS;
 
   if (matchops_dotall)
-    pcre_compile_ops |= PCRE_DOTALL;
+    pcre2_compile_ops |= PCRE2_DOTALL;
 
-  regex_compiled = pcre_compile(matchstr, pcre_compile_ops, &pcre_errptr,
-                                   &pcre_erroffset, NULL);
+  regex_compiled = pcre2_compile((PCRE2_SPTR)matchstr,PCRE2_ZERO_TERMINATED, pcre2_compile_ops, &pcre2_errcode,
+                                   &pcre2_erroffset, NULL);
 
   if (regex_compiled == NULL)
-    fatal("%s: illegal regexp on line %d of nmap-service-probes (at regexp offset %d): %s\n", __func__, lineno, pcre_erroffset, pcre_errptr);
+    fatal("%s: illegal regexp on line %d of nmap-service-probes (at regexp offset %ld): %d\n", __func__, lineno, pcre2_erroffset, pcre2_errcode);
 
-  // Now study the regexp for greater efficiency
-  regex_extra = pcre_study(regex_compiled, 0
-#ifdef PCRE_STUDY_EXTRA_NEEDED
-  | PCRE_STUDY_EXTRA_NEEDED
-#endif
-  , &pcre_errptr);
-  if (pcre_errptr != NULL)
-    fatal("%s: failed to pcre_study regexp on line %d of nmap-service-probes: %s\n", __func__, lineno, pcre_errptr);
+  // creates a new match data block for holding the result of a match
+  match_data = pcre2_match_data_create_from_pattern(
+    regex_compiled,NULL
+  );
 
-  if (!regex_extra) {
-    regex_extra = (pcre_extra *) pcre_malloc(sizeof(pcre_extra));
-    memset(regex_extra, 0, sizeof(pcre_extra));
+  if (!match_data) {
+    fatal("%s: failed to allocate match_data\n", __func__);
   }
 
+  match_context = pcre2_match_context_create(NULL);
+
+  if (!match_context) {
+    fatal("%s: failed to allocate match_context\n", __func__);
+  }
   // Set some limits to avoid evil match cases.
   // These are flexible; if they cause problems, increase them.
-#ifdef PCRE_ERROR_MATCHLIMIT
-  regex_extra->match_limit = 100000; // 100K
-#endif
-#ifdef PCRE_ERROR_RECURSIONLIMIT
-  regex_extra->match_limit_recursion = 10000; // 10K
+  pcre2_set_match_limit(match_context, 100000);
+#ifdef pcre2_set_depth_limit
+  // Changed name in PCRE2 10.30. PCRE2 uses macro definitions for function
+  // names, so we don't have to add this to configure.ac.
+  pcre2_set_depth_limit(match_context, 10000);
+#else
+  pcre2_set_recursion_limit(match_context, 10000);
 #endif
 
-
   /* OK! Now we look for any templates of the form ?/.../
    * where ? is either p, v, i, h, o, or d. / is any
    * delimiter character and ... is a template */
@@ -509,34 +523,29 @@ const struct MatchDetails *ServiceProbeMatch::testMatch(const u8 *buf, int bufle
   static char devicetype[32];
   static char cpe_a[80], cpe_h[80], cpe_o[80];
   char *bufc = (char *) buf;
-  int ovector[150]; // allows 50 substring matches (including the overall match)
   assert(isInitialized);
 
   // Clear out the output struct
   memset(&MD_return, 0, sizeof(MD_return));
   MD_return.isSoft = isSoft;
 
-  rc = pcre_exec(regex_compiled, regex_extra, bufc, buflen, 0, 0, ovector, sizeof(ovector) / sizeof(*ovector));
+  rc = pcre2_match(regex_compiled, (PCRE2_SPTR8)bufc, buflen, 0, 0, match_data, match_context);
   if (rc < 0) {
-#ifdef PCRE_ERROR_MATCHLIMIT  // earlier PCRE versions lack this
-    if (rc == PCRE_ERROR_MATCHLIMIT) {
+    if (rc == PCRE2_ERROR_MATCHLIMIT) {
       if (o.debugging || o.verbose > 1)
         error("Warning: Hit PCRE_ERROR_MATCHLIMIT when probing for service %s with the regex '%s'", servicename, matchstr);
     } else
-#endif // PCRE_ERROR_MATCHLIMIT
-#ifdef PCRE_ERROR_RECURSIONLIMIT
-    if (rc == PCRE_ERROR_RECURSIONLIMIT) {
+    if (rc == PCRE2_ERROR_RECURSIONLIMIT) {
       if (o.debugging || o.verbose > 1)
         error("Warning: Hit PCRE_ERROR_RECURSIONLIMIT when probing for service %s with the regex '%s'", servicename, matchstr);
     } else
-#endif // PCRE_ERROR_RECURSIONLIMIT
-      if (rc != PCRE_ERROR_NOMATCH) {
+      if (rc != PCRE2_ERROR_NOMATCH) {
         fatal("Unexpected PCRE error (%d) when probing for service %s with the regex '%s'", rc, servicename, matchstr);
       }
   } else {
     // Yeah!  Match apparently succeeded.
     // Now lets get the version number if available
-    getVersionStr(buf, buflen, ovector, rc, product, sizeof(product), version, sizeof(version), info, sizeof(info),
+    getVersionStr(buf, buflen, product, sizeof(product), version, sizeof(version), info, sizeof(info),
                   hostname, sizeof(hostname), ostype, sizeof(ostype), devicetype, sizeof(devicetype),
                   cpe_a, sizeof(cpe_a), cpe_h, sizeof(cpe_h), cpe_o, sizeof(cpe_o));
     if (*product) MD_return.product = product;
@@ -685,18 +694,17 @@ static char *transform_cpe(const char *s) {
 // This function does the substitution of a placeholder like $2 or $P(4). It
 // returns a newly allocated string, or NULL if it fails. tmplvar is a template
 // variable, such as "$P(2)". We set *tmplvarend to the character after the
-// variable. subject, subjectlen, ovector, and nummatches mean the same as in
+// variable. subject, subjectlen, and match_data mean the same as in
 // dotmplsubst().
 static char *substvar(char *tmplvar, char **tmplvarend,
-             const u8 *subject, int subjectlen, int *ovector,
-             int nummatches) {
+             const u8 *subject, size_t subjectlen, pcre2_match_data *match_data
+             ) {
   char substcommand[16];
   char *p = NULL;
   char *p_end;
-  int subnum = 0;
-  int offstart, offend;
+  u8 subnum = 0;
+  PCRE2_SIZE offstart, offend;
   int rc;
-  int i;
   struct substargs command_args;
   char *result;
   size_t n, len;
@@ -728,6 +736,8 @@ static char *substvar(char *tmplvar, char **tmplvarend,
   }
 
   if (tmplvarend) *tmplvarend = tmplvar;
+  u32 nummatches = pcre2_get_ovector_count(match_data);
+  PCRE2_SIZE *ovector = pcre2_get_ovector_pointer(match_data);
 
   strbuf_init(&result, &n, &len);
   if (!*substcommand) {
@@ -735,9 +745,10 @@ static char *substvar(char *tmplvar, char **tmplvarend,
     if (subnum > 9 || subnum <= 0) return NULL;
     if (subnum >= nummatches) return NULL;
     offstart = ovector[subnum * 2];
+    if (offstart == PCRE2_UNSET) return NULL;
     offend = ovector[subnum * 2 + 1];
-    assert(offstart >= 0 && offstart <= subjectlen);
-    assert(offend >= 0 && offend <= subjectlen);
+    assert(offstart <= subjectlen);
+    assert(offend != PCRE2_UNSET && offend <= subjectlen);
     // A plain-jane copy
     strbuf_append(&result, &n, &len, (const char *) subject + offstart, offend - offstart);
   } else if (strcmp(substcommand, "P") == 0) {
@@ -749,13 +760,14 @@ static char *substvar(char *tmplvar, char **tmplvarend,
     if (subnum > 9 || subnum <= 0) return NULL;
     if (subnum >= nummatches) return NULL;
     offstart = ovector[subnum * 2];
+    if (offstart == PCRE2_UNSET) return NULL;
     offend = ovector[subnum * 2 + 1];
-    assert(offstart >= 0 && offstart <= subjectlen);
-    assert(offend >= 0 && offend <= subjectlen);
+    assert(offstart <= subjectlen);
+    assert(offend != PCRE2_UNSET && offend <= subjectlen);
     // This filter only includes printable characters.  It is particularly
     // useful for collapsing unicode text that looks like
     // "W\0O\0R\0K\0G\0R\0O\0U\0P\0"
-    for(i=offstart; i < offend; i++) {
+    for(PCRE2_SIZE i=offstart; i < offend; i++) {
       if (isprint((int) subject[i]))
         strbuf_append(&result, &n, &len, (const char *) subject + i, 1);
     }
@@ -772,14 +784,15 @@ static char *substvar(char *tmplvar, char **tmplvarend,
     if (subnum > 9 || subnum <= 0) return NULL;
     if (subnum >= nummatches) return NULL;
     offstart = ovector[subnum * 2];
+    if (offstart == PCRE2_UNSET) return NULL;
     offend = ovector[subnum * 2 + 1];
-    assert(offstart >= 0 && offstart <= subjectlen);
-    assert(offend >= 0 && offend <= subjectlen);
+    assert(offstart <= subjectlen);
+    assert(offend != PCRE2_UNSET && offend <= subjectlen);
     findstr = command_args.str_args[1];
     findstrlen = command_args.str_args_len[1];
     replstr = command_args.str_args[2];
     replstrlen = command_args.str_args_len[2];
-    for(i=offstart; i < offend; ) {
+    for(PCRE2_SIZE i=offstart; i < offend; ) {
       if (memcmp(subject + i, findstr, findstrlen) != 0) {
         strbuf_append(&result, &n, &len, (const char *) subject + i, 1); // no match
         i++;
@@ -805,8 +818,9 @@ static char *substvar(char *tmplvar, char **tmplvarend,
     if (subnum > 9 || subnum <= 0) return NULL;
     if (subnum >= nummatches) return NULL;
     offstart = ovector[subnum * 2];
+    if (offstart == PCRE2_UNSET) return NULL;
     offend = ovector[subnum * 2 + 1];
-    assert(offstart >= 0 && offstart <= subjectlen);
+    assert(offend != PCRE2_UNSET && offstart <= subjectlen);
 
     // overflow
     if (offend - offstart > 8) {
@@ -824,11 +838,11 @@ static char *substvar(char *tmplvar, char **tmplvarend,
         break;
     }
     if (bigendian) {
-      for(i=offstart; i < offend; i++) {
+      for(PCRE2_SIZE i=offstart; i < offend; i++) {
         val = (val<<8) + subject[i];
       }
     } else {
-      for(i=offend - 1; i > offstart - 1; i--) {
+      for(PCRE2_SIZE i=offend - 1; i > offstart - 1; i--) {
         val = (val<<8) + subject[i];
       }
     }
@@ -847,16 +861,16 @@ static char *substvar(char *tmplvar, char **tmplvarend,
 
 // This function takes a template string (tmpl) which can have
 // placeholders in it such as $1 for substring matches in a regexp
-// that was run against subject, and subjectlen, with the 'nummatches'
-// matches in ovector.  The NUL-terminated newly composted string is
+// that was run against subject, and subjectlen, with the
+// matches in match_data.  The NUL-terminated newly composted string is
 // placed into 'newstr', as long as it doesn't exceed 'newstrlen'
 // bytes.  Trailing whitespace and commas are removed.  Returns zero for success
 //
 // The transform argument is a function pointer. If not NULL, the given
 // function is applied to all substitutions before they are inserted
 // into the result string.
-static int dotmplsubst(const u8 *subject, int subjectlen,
-                       int *ovector, int nummatches, char *tmpl, char *newstr,
+static int dotmplsubst(const u8 *subject, size_t subjectlen,
+                       pcre2_match_data *match_data, char *tmpl, char *newstr,
                        int newstrlen,
                        char *(*transform)(const char *) = NULL) {
   int newlen;
@@ -895,7 +909,7 @@ static int dotmplsubst(const u8 *subject, int subjectlen,
         dst += newlen;
       }
       srcstart = srcend;
-      subst = substvar(srcstart, &srcend, subject, subjectlen, ovector, nummatches);
+      subst = substvar(srcstart, &srcend, subject, subjectlen, match_data);
       if (subst == NULL)
         return -1;
       /* Apply transformation if requested. */
@@ -937,14 +951,14 @@ static int dotmplsubst(const u8 *subject, int subjectlen,
 // for a string, that string will have zero length after the function
 // call (assuming the corresponding length passed in is at least 1)
 
-int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
-            int *ovector, int nummatches, char *product, int productlen,
-            char *version, int versionlen, char *info, int infolen,
-                  char *hostname, int hostnamelen, char *ostype, int ostypelen,
-                  char *devicetype, int devicetypelen,
-                  char *cpe_a, int cpe_alen,
-                  char *cpe_h, int cpe_hlen,
-                  char *cpe_o, int cpe_olen) const {
+int ServiceProbeMatch::getVersionStr(const u8 *subject, size_t subjectlen,
+            char *product, size_t productlen,
+            char *version, size_t versionlen, char *info, size_t infolen,
+                  char *hostname, size_t hostnamelen, char *ostype, size_t ostypelen,
+                  char *devicetype, size_t devicetypelen,
+                  char *cpe_a, size_t cpe_alen,
+                  char *cpe_h, size_t cpe_hlen,
+                  char *cpe_o, size_t cpe_olen) const {
 
   int rc;
   assert(productlen >= 0 && versionlen >= 0 && infolen >= 0 &&
@@ -963,9 +977,9 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
 
   // Now lets get this started!  We begin with the product name
   if (product_template) {
-    rc = dotmplsubst(subject, subjectlen, ovector, nummatches, product_template, product, productlen);
+    rc = dotmplsubst(subject, subjectlen, match_data, product_template, product, productlen);
     if (rc != 0) {
-      error("Warning: Servicescan failed to fill product_template (subjectlen: %d, productlen: %d). Capture exceeds length? Match string was line %d: p/%s/%s/%s", subjectlen, productlen, deflineno,
+      error("Warning: Servicescan failed to fill product_template (subjectlen: %lu, productlen: %lu). Capture exceeds length? Match string was line %d: p/%s/%s/%s", subjectlen, productlen, deflineno,
             (product_template)? product_template : "",
             (version_template)? version_template : "",
             (info_template)? info_template : "");
@@ -975,9 +989,9 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
   }
 
   if (version_template) {
-    rc = dotmplsubst(subject, subjectlen, ovector, nummatches, version_template, version, versionlen);
+    rc = dotmplsubst(subject, subjectlen, match_data, version_template, version, versionlen);
     if (rc != 0) {
-      error("Warning: Servicescan failed to fill version_template (subjectlen: %d, versionlen: %d). Capture exceeds length? Match string was line %d: v/%s/%s/%s", subjectlen, versionlen, deflineno,
+      error("Warning: Servicescan failed to fill version_template (subjectlen: %lu, versionlen: %lu). Capture exceeds length? Match string was line %d: v/%s/%s/%s", subjectlen, versionlen, deflineno,
             (product_template)? product_template : "",
             (version_template)? version_template : "",
             (info_template)? info_template : "");
@@ -987,9 +1001,9 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
   }
 
   if (info_template) {
-    rc = dotmplsubst(subject, subjectlen, ovector, nummatches, info_template, info, infolen);
+    rc = dotmplsubst(subject, subjectlen, match_data, info_template, info, infolen);
     if (rc != 0) {
-      error("Warning: Servicescan failed to fill info_template (subjectlen: %d, infolen: %d). Capture exceeds length? Match string was line %d: i/%s/%s/%s", subjectlen, infolen, deflineno,
+      error("Warning: Servicescan failed to fill info_template (subjectlen: %lu, infolen: %lu). Capture exceeds length? Match string was line %d: i/%s/%s/%s", subjectlen, infolen, deflineno,
             (product_template)? product_template : "",
             (version_template)? version_template : "",
             (info_template)? info_template : "");
@@ -999,9 +1013,9 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
   }
 
   if (hostname_template) {
-    rc = dotmplsubst(subject, subjectlen, ovector, nummatches, hostname_template, hostname, hostnamelen);
+    rc = dotmplsubst(subject, subjectlen, match_data, hostname_template, hostname, hostnamelen);
     if (rc != 0) {
-      error("Warning: Servicescan failed to fill hostname_template (subjectlen: %d, hostnamelen: %d). Capture exceeds length? Match string was line %d: h/%s/", subjectlen, hostnamelen, deflineno,
+      error("Warning: Servicescan failed to fill hostname_template (subjectlen: %lu, hostnamelen: %lu). Capture exceeds length? Match string was line %d: h/%s/", subjectlen, hostnamelen, deflineno,
             (hostname_template)? hostname_template : "");
       if (hostnamelen > 0) *hostname = '\0';
       retval = -1;
@@ -1009,9 +1023,9 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
   }
 
   if (ostype_template) {
-    rc = dotmplsubst(subject, subjectlen, ovector, nummatches, ostype_template, ostype, ostypelen);
+    rc = dotmplsubst(subject, subjectlen, match_data, ostype_template, ostype, ostypelen);
     if (rc != 0) {
-      error("Warning: Servicescan failed to fill ostype_template (subjectlen: %d, ostypelen: %d). Capture exceeds length? Match string was line %d: o/%s/", subjectlen, ostypelen, deflineno,
+      error("Warning: Servicescan failed to fill ostype_template (subjectlen: %lu, ostypelen: %lu). Capture exceeds length? Match string was line %d: o/%s/", subjectlen, ostypelen, deflineno,
             (ostype_template)? ostype_template : "");
       if (ostypelen > 0) *ostype = '\0';
       retval = -1;
@@ -1019,9 +1033,9 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
   }
 
   if (devicetype_template) {
-    rc = dotmplsubst(subject, subjectlen, ovector, nummatches, devicetype_template, devicetype, devicetypelen);
+    rc = dotmplsubst(subject, subjectlen, match_data, devicetype_template, devicetype, devicetypelen);
     if (rc != 0) {
-      error("Warning: Servicescan failed to fill devicetype_template (subjectlen: %d, devicetypelen: %d). Too long? Match string was line %d: d/%s/", subjectlen, devicetypelen, deflineno,
+      error("Warning: Servicescan failed to fill devicetype_template (subjectlen: %lu, devicetypelen: %lu). Too long? Match string was line %d: d/%s/", subjectlen, devicetypelen, deflineno,
             (devicetype_template)? devicetype_template : "");
       if (devicetypelen > 0) *devicetype = '\0';
       retval = -1;
@@ -1032,7 +1046,7 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
      store in cpe_a, cpe_h, or cpe_o as appropriate. */
   for (unsigned int i = 0; i < cpe_templates.size(); i++) {
     char *cpe;
-    int cpelen;
+    size_t cpelen;
     int part;
 
     part = cpe_get_part(cpe_templates[i]);
@@ -1055,9 +1069,9 @@ int ServiceProbeMatch::getVersionStr(const u8 *subject, int subjectlen,
       continue;
       break;
     }
-    rc = dotmplsubst(subject, subjectlen, ovector, nummatches, cpe_templates[i], cpe, cpelen, transform_cpe);
+    rc = dotmplsubst(subject, subjectlen, match_data, cpe_templates[i], cpe, cpelen, transform_cpe);
     if (rc != 0) {
-      error("Warning: Servicescan failed to fill cpe_%c (subjectlen: %d, cpelen: %d). Too long? Match string was line %d: %s", part, subjectlen, cpelen, deflineno,
+      error("Warning: Servicescan failed to fill cpe_%c (subjectlen: %lu, cpelen: %lu). Too long? Match string was line %d: %s", part, subjectlen, cpelen, deflineno,
             (cpe_templates[i])? cpe_templates[i] : "");
       if (cpelen > 0) *cpe = '\0';
       retval = -1;
diff --git a/service_scan.h b/service_scan.h
index 7723d81..8ebdee7 100644
--- a/service_scan.h
+++ b/service_scan.h
@@ -69,16 +69,8 @@
 
 #include <vector>
 
-#ifdef HAVE_CONFIG_H
-/* Needed for HAVE_PCRE_PCRE_H below */
-#include "nmap_config.h"
-#endif /* HAVE_CONFIG_H */
-
-#ifdef HAVE_PCRE_PCRE_H
-# include <pcre/pcre.h>
-#else
-# include <pcre.h>
-#endif
+#define PCRE2_CODE_UNIT_WIDTH 8
+#include <pcre2.h>
 
 #undef NDEBUG
 #include <assert.h>
@@ -155,8 +147,9 @@ class ServiceProbeMatch {
   bool isInitialized; // Has InitMatch yet been called?
   const char *servicename;
   char *matchstr; // Regular expression text
-  pcre *regex_compiled;
-  pcre_extra *regex_extra;
+  pcre2_code *regex_compiled;
+  pcre2_match_data *match_data;
+  pcre2_match_context *match_context;
   bool matchops_ignorecase;
   bool matchops_dotall;
   bool isSoft; // is this a soft match? ("softmatch" keyword in nmap-service-probes)
@@ -179,14 +172,14 @@ class ServiceProbeMatch {
   // are sufficient).  Returns zero for success.  If no template is available
   // for a string, that string will have zero length after the function
   // call (assuming the corresponding length passed in is at least 1)
-  int getVersionStr(const u8 *subject, int subjectlen, int *ovector,
-                  int nummatches, char *product, int productlen,
-                  char *version, int versionlen, char *info, int infolen,
-                  char *hostname, int hostnamelen, char *ostype, int ostypelen,
-                  char *devicetype, int devicetypelen,
-                  char *cpe_a, int cpe_alen,
-                  char *cpe_h, int cpe_hlen,
-                  char *cpe_o, int cpe_olen) const;
+  int getVersionStr(const u8 *subject, size_t subjectlen,
+                  char *product, size_t productlen,
+                  char *version, size_t versionlen, char *info, size_t infolen,
+                  char *hostname, size_t hostnamelen, char *ostype, size_t ostypelen,
+                  char *devicetype, size_t devicetypelen,
+                  char *cpe_a, size_t cpe_alen,
+                  char *cpe_h, size_t cpe_hlen,
+                  char *cpe_o, size_t cpe_olen) const;
 };