Gnulib fuer Base64 hinzugefuegt

5 files changed, 1485 insertions, 0 deletions

diff --git a/lib/Makefile.am b/lib/Makefile.am
new file mode 100644
index 0000000..f8e19cc
--- /dev/null
+++ b/lib/Makefile.am
@@ -0,0 +1,70 @@
+## DO NOT EDIT! GENERATED AUTOMATICALLY!
+## Process this file with automake to produce Makefile.in.
+# Copyright (C) 2002-2009 Free Software Foundation, Inc.
+#
+# This file is free software, distributed under the terms of the GNU
+# General Public License.  As a special exception to the GNU General
+# Public License, this file may be distributed as part of a program
+# that contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=config --libtool --macro-prefix=gl --no-vc-files base64
+
+AUTOMAKE_OPTIONS = 1.5 gnits
+
+SUBDIRS =
+noinst_HEADERS =
+noinst_LIBRARIES =
+noinst_LTLIBRARIES =
+EXTRA_DIST =
+BUILT_SOURCES =
+SUFFIXES =
+MOSTLYCLEANFILES = core *.stackdump
+MOSTLYCLEANDIRS =
+CLEANFILES =
+DISTCLEANFILES =
+MAINTAINERCLEANFILES =
+
+AM_CPPFLAGS =
+
+noinst_LTLIBRARIES += libgnu.la
+
+libgnu_la_SOURCES =
+libgnu_la_LIBADD = $(gl_LTLIBOBJS)
+libgnu_la_DEPENDENCIES = $(gl_LTLIBOBJS)
+EXTRA_libgnu_la_SOURCES =
+libgnu_la_LDFLAGS = $(AM_LDFLAGS)
+
+## begin gnulib module base64
+
+libgnu_la_SOURCES += base64.h base64.c
+
+## end   gnulib module base64
+
+## begin gnulib module stdbool
+
+BUILT_SOURCES += $(STDBOOL_H)
+
+# We need the following in order to create <stdbool.h> when the system
+# doesn't have one that works.
+stdbool.h: stdbool.in.h
+	rm -f $@-t $@
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's/@''HAVE__BOOL''@/$(HAVE__BOOL)/g' < $(srcdir)/stdbool.in.h; \
+	} > $@-t
+	mv $@-t $@
+MOSTLYCLEANFILES += stdbool.h stdbool.h-t
+
+EXTRA_DIST += stdbool.in.h
+
+## end   gnulib module stdbool
+
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
diff --git a/lib/Makefile.in b/lib/Makefile.in
new file mode 100644
index 0000000..56f46b0
--- /dev/null
+++ b/lib/Makefile.in
@@ -0,0 +1,659 @@
+# Makefile.in generated by automake 1.10.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008  Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# Copyright (C) 2002-2009 Free Software Foundation, Inc.
+#
+# This file is free software, distributed under the terms of the GNU
+# General Public License.  As a special exception to the GNU General
+# Public License, this file may be distributed as part of a program
+# that contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=config --libtool --macro-prefix=gl --no-vc-files base64
+
+
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+	$(top_srcdir)/m4/base64.m4 $(top_srcdir)/m4/gnulib-common.m4 \
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+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	if test -z "$(ETAGS_ARGS)$$tags$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	    $$tags $$unique; \
+	fi
+ctags: CTAGS
+CTAGS: ctags-recursive $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	tags=; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$tags$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$tags $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && cd $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) $$here
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -pR $(srcdir)/$$file $(distdir)$$dir || exit 1; \
+	    fi; \
+	    cp -pR $$d/$$file $(distdir)$$dir || exit 1; \
+	  else \
+	    test -f $(distdir)/$$file \
+	    || cp -p $$d/$$file $(distdir)/$$file \
+	    || exit 1; \
+	  fi; \
+	done
+	list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    test -d "$(distdir)/$$subdir" \
+	    || $(MKDIR_P) "$(distdir)/$$subdir" \
+	    || exit 1; \
+	    distdir=`$(am__cd) $(distdir) && pwd`; \
+	    top_distdir=`$(am__cd) $(top_distdir) && pwd`; \
+	    (cd $$subdir && \
+	      $(MAKE) $(AM_MAKEFLAGS) \
+	        top_distdir="$$top_distdir" \
+	        distdir="$$distdir/$$subdir" \
+		am__remove_distdir=: \
+		am__skip_length_check=: \
+	        distdir) \
+	      || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) check-recursive
+all-am: Makefile $(LIBRARIES) $(LTLIBRARIES) $(HEADERS)
+installdirs: installdirs-recursive
+installdirs-am:
+install: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) install-recursive
+install-exec: install-exec-recursive
+install-data: install-data-recursive
+uninstall: uninstall-recursive
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-recursive
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+	-test -z "$(MOSTLYCLEANFILES)" || rm -f $(MOSTLYCLEANFILES)
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test -z "$(DISTCLEANFILES)" || rm -f $(DISTCLEANFILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(BUILT_SOURCES)" || rm -f $(BUILT_SOURCES)
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-recursive
+
+clean-am: clean-generic clean-libtool clean-noinstLIBRARIES \
+	clean-noinstLTLIBRARIES mostlyclean-am
+
+distclean: distclean-recursive
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-recursive
+
+dvi-am:
+
+html: html-recursive
+
+info: info-recursive
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-recursive
+
+install-exec-am:
+
+install-html: install-html-recursive
+
+install-info: install-info-recursive
+
+install-man:
+
+install-pdf: install-pdf-recursive
+
+install-ps: install-ps-recursive
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool mostlyclean-local
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: $(RECURSIVE_CLEAN_TARGETS) $(RECURSIVE_TARGETS) install-am \
+	install-strip
+
+.PHONY: $(RECURSIVE_CLEAN_TARGETS) $(RECURSIVE_TARGETS) CTAGS GTAGS \
+	all all-am check check-am clean clean-generic clean-libtool \
+	clean-noinstLIBRARIES clean-noinstLTLIBRARIES ctags \
+	ctags-recursive distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs installdirs-am maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool mostlyclean-local pdf \
+	pdf-am ps ps-am tags tags-recursive uninstall uninstall-am
+
+
+# We need the following in order to create <stdbool.h> when the system
+# doesn't have one that works.
+stdbool.h: stdbool.in.h
+	rm -f $@-t $@
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's/@''HAVE__BOOL''@/$(HAVE__BOOL)/g' < $(srcdir)/stdbool.in.h; \
+	} > $@-t
+	mv $@-t $@
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/lib/base64.c b/lib/base64.c
new file mode 100644
index 0000000..42ccc9c
--- /dev/null
+++ b/lib/base64.c
@@ -0,0 +1,576 @@
+/* base64.c -- Encode binary data using printable characters.
+   Copyright (C) 1999, 2000, 2001, 2004, 2005, 2006 Free Software
+   Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Simon Josefsson.  Partially adapted from GNU MailUtils
+ * (mailbox/filter_trans.c, as of 2004-11-28).  Improved by review
+ * from Paul Eggert, Bruno Haible, and Stepan Kasal.
+ *
+ * See also RFC 3548 <http://www.ietf.org/rfc/rfc3548.txt>.
+ *
+ * Be careful with error checking.  Here is how you would typically
+ * use these functions:
+ *
+ * bool ok = base64_decode_alloc (in, inlen, &out, &outlen);
+ * if (!ok)
+ *   FAIL: input was not valid base64
+ * if (out == NULL)
+ *   FAIL: memory allocation error
+ * OK: data in OUT/OUTLEN
+ *
+ * size_t outlen = base64_encode_alloc (in, inlen, &out);
+ * if (out == NULL && outlen == 0 && inlen != 0)
+ *   FAIL: input too long
+ * if (out == NULL)
+ *   FAIL: memory allocation error
+ * OK: data in OUT/OUTLEN.
+ *
+ */
+
+#include <config.h>
+
+/* Get prototype. */
+#include "base64.h"
+
+/* Get malloc. */
+#include <stdlib.h>
+
+/* Get UCHAR_MAX. */
+#include <limits.h>
+
+#include <string.h>
+
+/* C89 compliant way to cast 'char' to 'unsigned char'. */
+static inline unsigned char
+to_uchar (char ch)
+{
+  return ch;
+}
+
+/* Base64 encode IN array of size INLEN into OUT array of size OUTLEN.
+   If OUTLEN is less than BASE64_LENGTH(INLEN), write as many bytes as
+   possible.  If OUTLEN is larger than BASE64_LENGTH(INLEN), also zero
+   terminate the output buffer. */
+void
+base64_encode (const char *restrict in, size_t inlen,
+	       char *restrict out, size_t outlen)
+{
+  static const char b64str[64] =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+  while (inlen && outlen)
+    {
+      *out++ = b64str[(to_uchar (in[0]) >> 2) & 0x3f];
+      if (!--outlen)
+	break;
+      *out++ = b64str[((to_uchar (in[0]) << 4)
+		       + (--inlen ? to_uchar (in[1]) >> 4 : 0))
+		      & 0x3f];
+      if (!--outlen)
+	break;
+      *out++ =
+	(inlen
+	 ? b64str[((to_uchar (in[1]) << 2)
+		   + (--inlen ? to_uchar (in[2]) >> 6 : 0))
+		  & 0x3f]
+	 : '=');
+      if (!--outlen)
+	break;
+      *out++ = inlen ? b64str[to_uchar (in[2]) & 0x3f] : '=';
+      if (!--outlen)
+	break;
+      if (inlen)
+	inlen--;
+      if (inlen)
+	in += 3;
+    }
+
+  if (outlen)
+    *out = '\0';
+}
+
+/* Allocate a buffer and store zero terminated base64 encoded data
+   from array IN of size INLEN, returning BASE64_LENGTH(INLEN), i.e.,
+   the length of the encoded data, excluding the terminating zero.  On
+   return, the OUT variable will hold a pointer to newly allocated
+   memory that must be deallocated by the caller.  If output string
+   length would overflow, 0 is returned and OUT is set to NULL.  If
+   memory allocation failed, OUT is set to NULL, and the return value
+   indicates length of the requested memory block, i.e.,
+   BASE64_LENGTH(inlen) + 1. */
+size_t
+base64_encode_alloc (const char *in, size_t inlen, char **out)
+{
+  size_t outlen = 1 + BASE64_LENGTH (inlen);
+
+  /* Check for overflow in outlen computation.
+   *
+   * If there is no overflow, outlen >= inlen.
+   *
+   * If the operation (inlen + 2) overflows then it yields at most +1, so
+   * outlen is 0.
+   *
+   * If the multiplication overflows, we lose at least half of the
+   * correct value, so the result is < ((inlen + 2) / 3) * 2, which is
+   * less than (inlen + 2) * 0.66667, which is less than inlen as soon as
+   * (inlen > 4).
+   */
+  if (inlen > outlen)
+    {
+      *out = NULL;
+      return 0;
+    }
+
+  *out = malloc (outlen);
+  if (!*out)
+    return outlen;
+
+  base64_encode (in, inlen, *out, outlen);
+
+  return outlen - 1;
+}
+
+/* With this approach this file works independent of the charset used
+   (think EBCDIC).  However, it does assume that the characters in the
+   Base64 alphabet (A-Za-z0-9+/) are encoded in 0..255.  POSIX
+   1003.1-2001 require that char and unsigned char are 8-bit
+   quantities, though, taking care of that problem.  But this may be a
+   potential problem on non-POSIX C99 platforms.
+
+   IBM C V6 for AIX mishandles "#define B64(x) ...'x'...", so use "_"
+   as the formal parameter rather than "x".  */
+#define B64(_)					\
+  ((_) == 'A' ? 0				\
+   : (_) == 'B' ? 1				\
+   : (_) == 'C' ? 2				\
+   : (_) == 'D' ? 3				\
+   : (_) == 'E' ? 4				\
+   : (_) == 'F' ? 5				\
+   : (_) == 'G' ? 6				\
+   : (_) == 'H' ? 7				\
+   : (_) == 'I' ? 8				\
+   : (_) == 'J' ? 9				\
+   : (_) == 'K' ? 10				\
+   : (_) == 'L' ? 11				\
+   : (_) == 'M' ? 12				\
+   : (_) == 'N' ? 13				\
+   : (_) == 'O' ? 14				\
+   : (_) == 'P' ? 15				\
+   : (_) == 'Q' ? 16				\
+   : (_) == 'R' ? 17				\
+   : (_) == 'S' ? 18				\
+   : (_) == 'T' ? 19				\
+   : (_) == 'U' ? 20				\
+   : (_) == 'V' ? 21				\
+   : (_) == 'W' ? 22				\
+   : (_) == 'X' ? 23				\
+   : (_) == 'Y' ? 24				\
+   : (_) == 'Z' ? 25				\
+   : (_) == 'a' ? 26				\
+   : (_) == 'b' ? 27				\
+   : (_) == 'c' ? 28				\
+   : (_) == 'd' ? 29				\
+   : (_) == 'e' ? 30				\
+   : (_) == 'f' ? 31				\
+   : (_) == 'g' ? 32				\
+   : (_) == 'h' ? 33				\
+   : (_) == 'i' ? 34				\
+   : (_) == 'j' ? 35				\
+   : (_) == 'k' ? 36				\
+   : (_) == 'l' ? 37				\
+   : (_) == 'm' ? 38				\
+   : (_) == 'n' ? 39				\
+   : (_) == 'o' ? 40				\
+   : (_) == 'p' ? 41				\
+   : (_) == 'q' ? 42				\
+   : (_) == 'r' ? 43				\
+   : (_) == 's' ? 44				\
+   : (_) == 't' ? 45				\
+   : (_) == 'u' ? 46				\
+   : (_) == 'v' ? 47				\
+   : (_) == 'w' ? 48				\
+   : (_) == 'x' ? 49				\
+   : (_) == 'y' ? 50				\
+   : (_) == 'z' ? 51				\
+   : (_) == '0' ? 52				\
+   : (_) == '1' ? 53				\
+   : (_) == '2' ? 54				\
+   : (_) == '3' ? 55				\
+   : (_) == '4' ? 56				\
+   : (_) == '5' ? 57				\
+   : (_) == '6' ? 58				\
+   : (_) == '7' ? 59				\
+   : (_) == '8' ? 60				\
+   : (_) == '9' ? 61				\
+   : (_) == '+' ? 62				\
+   : (_) == '/' ? 63				\
+   : -1)
+
+static const signed char b64[0x100] = {
+  B64 (0), B64 (1), B64 (2), B64 (3),
+  B64 (4), B64 (5), B64 (6), B64 (7),
+  B64 (8), B64 (9), B64 (10), B64 (11),
+  B64 (12), B64 (13), B64 (14), B64 (15),
+  B64 (16), B64 (17), B64 (18), B64 (19),
+  B64 (20), B64 (21), B64 (22), B64 (23),
+  B64 (24), B64 (25), B64 (26), B64 (27),
+  B64 (28), B64 (29), B64 (30), B64 (31),
+  B64 (32), B64 (33), B64 (34), B64 (35),
+  B64 (36), B64 (37), B64 (38), B64 (39),
+  B64 (40), B64 (41), B64 (42), B64 (43),
+  B64 (44), B64 (45), B64 (46), B64 (47),
+  B64 (48), B64 (49), B64 (50), B64 (51),
+  B64 (52), B64 (53), B64 (54), B64 (55),
+  B64 (56), B64 (57), B64 (58), B64 (59),
+  B64 (60), B64 (61), B64 (62), B64 (63),
+  B64 (64), B64 (65), B64 (66), B64 (67),
+  B64 (68), B64 (69), B64 (70), B64 (71),
+  B64 (72), B64 (73), B64 (74), B64 (75),
+  B64 (76), B64 (77), B64 (78), B64 (79),
+  B64 (80), B64 (81), B64 (82), B64 (83),
+  B64 (84), B64 (85), B64 (86), B64 (87),
+  B64 (88), B64 (89), B64 (90), B64 (91),
+  B64 (92), B64 (93), B64 (94), B64 (95),
+  B64 (96), B64 (97), B64 (98), B64 (99),
+  B64 (100), B64 (101), B64 (102), B64 (103),
+  B64 (104), B64 (105), B64 (106), B64 (107),
+  B64 (108), B64 (109), B64 (110), B64 (111),
+  B64 (112), B64 (113), B64 (114), B64 (115),
+  B64 (116), B64 (117), B64 (118), B64 (119),
+  B64 (120), B64 (121), B64 (122), B64 (123),
+  B64 (124), B64 (125), B64 (126), B64 (127),
+  B64 (128), B64 (129), B64 (130), B64 (131),
+  B64 (132), B64 (133), B64 (134), B64 (135),
+  B64 (136), B64 (137), B64 (138), B64 (139),
+  B64 (140), B64 (141), B64 (142), B64 (143),
+  B64 (144), B64 (145), B64 (146), B64 (147),
+  B64 (148), B64 (149), B64 (150), B64 (151),
+  B64 (152), B64 (153), B64 (154), B64 (155),
+  B64 (156), B64 (157), B64 (158), B64 (159),
+  B64 (160), B64 (161), B64 (162), B64 (163),
+  B64 (164), B64 (165), B64 (166), B64 (167),
+  B64 (168), B64 (169), B64 (170), B64 (171),
+  B64 (172), B64 (173), B64 (174), B64 (175),
+  B64 (176), B64 (177), B64 (178), B64 (179),
+  B64 (180), B64 (181), B64 (182), B64 (183),
+  B64 (184), B64 (185), B64 (186), B64 (187),
+  B64 (188), B64 (189), B64 (190), B64 (191),
+  B64 (192), B64 (193), B64 (194), B64 (195),
+  B64 (196), B64 (197), B64 (198), B64 (199),
+  B64 (200), B64 (201), B64 (202), B64 (203),
+  B64 (204), B64 (205), B64 (206), B64 (207),
+  B64 (208), B64 (209), B64 (210), B64 (211),
+  B64 (212), B64 (213), B64 (214), B64 (215),
+  B64 (216), B64 (217), B64 (218), B64 (219),
+  B64 (220), B64 (221), B64 (222), B64 (223),
+  B64 (224), B64 (225), B64 (226), B64 (227),
+  B64 (228), B64 (229), B64 (230), B64 (231),
+  B64 (232), B64 (233), B64 (234), B64 (235),
+  B64 (236), B64 (237), B64 (238), B64 (239),
+  B64 (240), B64 (241), B64 (242), B64 (243),
+  B64 (244), B64 (245), B64 (246), B64 (247),
+  B64 (248), B64 (249), B64 (250), B64 (251),
+  B64 (252), B64 (253), B64 (254), B64 (255)
+};
+
+#if UCHAR_MAX == 255
+# define uchar_in_range(c) true
+#else
+# define uchar_in_range(c) ((c) <= 255)
+#endif
+
+/* Return true if CH is a character from the Base64 alphabet, and
+   false otherwise.  Note that '=' is padding and not considered to be
+   part of the alphabet.  */
+bool
+isbase64 (char ch)
+{
+  return uchar_in_range (to_uchar (ch)) && 0 <= b64[to_uchar (ch)];
+}
+
+/* Initialize decode-context buffer, CTX.  */
+void
+base64_decode_ctx_init (struct base64_decode_context *ctx)
+{
+  ctx->i = 0;
+}
+
+/* If CTX->i is 0 or 4, there are four or more bytes in [*IN..IN_END), and
+   none of those four is a newline, then return *IN.  Otherwise, copy up to
+   4 - CTX->i non-newline bytes from that range into CTX->buf, starting at
+   index CTX->i and setting CTX->i to reflect the number of bytes copied,
+   and return CTX->buf.  In either case, advance *IN to point to the byte
+   after the last one processed, and set *N_NON_NEWLINE to the number of
+   verified non-newline bytes accessible through the returned pointer.  */
+static inline char *
+get_4 (struct base64_decode_context *ctx,
+       char const *restrict *in, char const *restrict in_end,
+       size_t *n_non_newline)
+{
+  if (ctx->i == 4)
+    ctx->i = 0;
+
+  if (ctx->i == 0)
+    {
+      char const *t = *in;
+      if (4 <= in_end - *in && memchr (t, '\n', 4) == NULL)
+	{
+	  /* This is the common case: no newline.  */
+	  *in += 4;
+	  *n_non_newline = 4;
+	  return (char *) t;
+	}
+    }
+
+  {
+    /* Copy non-newline bytes into BUF.  */
+    char const *p = *in;
+    while (p < in_end)
+      {
+	char c = *p++;
+	if (c != '\n')
+	  {
+	    ctx->buf[ctx->i++] = c;
+	    if (ctx->i == 4)
+	      break;
+	  }
+      }
+
+    *in = p;
+    *n_non_newline = ctx->i;
+    return ctx->buf;
+  }
+}
+
+#define return_false				\
+  do						\
+    {						\
+      *outp = out;				\
+      return false;				\
+    }						\
+  while (false)
+
+/* Decode up to four bytes of base64-encoded data, IN, of length INLEN
+   into the output buffer, *OUT, of size *OUTLEN bytes.  Return true if
+   decoding is successful, false otherwise.  If *OUTLEN is too small,
+   as many bytes as possible are written to *OUT.  On return, advance
+   *OUT to point to the byte after the last one written, and decrement
+   *OUTLEN to reflect the number of bytes remaining in *OUT.  */
+static inline bool
+decode_4 (char const *restrict in, size_t inlen,
+	  char *restrict *outp, size_t *outleft)
+{
+  char *out = *outp;
+  if (inlen < 2)
+    return false;
+
+  if (!isbase64 (in[0]) || !isbase64 (in[1]))
+    return false;
+
+  if (*outleft)
+    {
+      *out++ = ((b64[to_uchar (in[0])] << 2)
+		| (b64[to_uchar (in[1])] >> 4));
+      --*outleft;
+    }
+
+  if (inlen == 2)
+    return_false;
+
+  if (in[2] == '=')
+    {
+      if (inlen != 4)
+	return_false;
+
+      if (in[3] != '=')
+	return_false;
+    }
+  else
+    {
+      if (!isbase64 (in[2]))
+	return_false;
+
+      if (*outleft)
+	{
+	  *out++ = (((b64[to_uchar (in[1])] << 4) & 0xf0)
+		    | (b64[to_uchar (in[2])] >> 2));
+	  --*outleft;
+	}
+
+      if (inlen == 3)
+	return_false;
+
+      if (in[3] == '=')
+	{
+	  if (inlen != 4)
+	    return_false;
+	}
+      else
+	{
+	  if (!isbase64 (in[3]))
+	    return_false;
+
+	  if (*outleft)
+	    {
+	      *out++ = (((b64[to_uchar (in[2])] << 6) & 0xc0)
+			| b64[to_uchar (in[3])]);
+	      --*outleft;
+	    }
+	}
+    }
+
+  *outp = out;
+  return true;
+}
+
+/* Decode base64-encoded input array IN of length INLEN to output array
+   OUT that can hold *OUTLEN bytes.  The input data may be interspersed
+   with newlines.  Return true if decoding was successful, i.e. if the
+   input was valid base64 data, false otherwise.  If *OUTLEN is too
+   small, as many bytes as possible will be written to OUT.  On return,
+   *OUTLEN holds the length of decoded bytes in OUT.  Note that as soon
+   as any non-alphabet, non-newline character is encountered, decoding
+   is stopped and false is returned.  If INLEN is zero, then process
+   only whatever data is stored in CTX.
+
+   Initially, CTX must have been initialized via base64_decode_ctx_init.
+   Subsequent calls to this function must reuse whatever state is recorded
+   in that buffer.  It is necessary for when a quadruple of base64 input
+   bytes spans two input buffers.
+
+   If CTX is NULL then newlines are treated as garbage and the input
+   buffer is processed as a unit.  */
+
+bool
+base64_decode_ctx (struct base64_decode_context *ctx,
+		   const char *restrict in, size_t inlen,
+		   char *restrict out, size_t *outlen)
+{
+  size_t outleft = *outlen;
+  bool ignore_newlines = ctx != NULL;
+  bool flush_ctx = false;
+  unsigned int ctx_i = 0;
+
+  if (ignore_newlines)
+    {
+      ctx_i = ctx->i;
+      flush_ctx = inlen == 0;
+    }
+
+
+  while (true)
+    {
+      size_t outleft_save = outleft;
+      if (ctx_i == 0 && !flush_ctx)
+	{
+	  while (true)
+	    {
+	      /* Save a copy of outleft, in case we need to re-parse this
+		 block of four bytes.  */
+	      outleft_save = outleft;
+	      if (!decode_4 (in, inlen, &out, &outleft))
+		break;
+
+	      in += 4;
+	      inlen -= 4;
+	    }
+	}
+
+      if (inlen == 0 && !flush_ctx)
+	break;
+
+      /* Handle the common case of 72-byte wrapped lines.
+	 This also handles any other multiple-of-4-byte wrapping.  */
+      if (inlen && *in == '\n' && ignore_newlines)
+	{
+	  ++in;
+	  --inlen;
+	  continue;
+	}
+
+      /* Restore OUT and OUTLEFT.  */
+      out -= outleft_save - outleft;
+      outleft = outleft_save;
+
+      {
+	char const *in_end = in + inlen;
+	char const *non_nl;
+
+	if (ignore_newlines)
+	  non_nl = get_4 (ctx, &in, in_end, &inlen);
+	else
+	  non_nl = in;  /* Might have nl in this case. */
+
+	/* If the input is empty or consists solely of newlines (0 non-newlines),
+	   then we're done.  Likewise if there are fewer than 4 bytes when not
+	   flushing context and not treating newlines as garbage.  */
+	if (inlen == 0 || (inlen < 4 && !flush_ctx && ignore_newlines))
+	  {
+	    inlen = 0;
+	    break;
+	  }
+	if (!decode_4 (non_nl, inlen, &out, &outleft))
+	  break;
+
+	inlen = in_end - in;
+      }
+    }
+
+  *outlen -= outleft;
+
+  return inlen == 0;
+}
+
+/* Allocate an output buffer in *OUT, and decode the base64 encoded
+   data stored in IN of size INLEN to the *OUT buffer.  On return, the
+   size of the decoded data is stored in *OUTLEN.  OUTLEN may be NULL,
+   if the caller is not interested in the decoded length.  *OUT may be
+   NULL to indicate an out of memory error, in which case *OUTLEN
+   contains the size of the memory block needed.  The function returns
+   true on successful decoding and memory allocation errors.  (Use the
+   *OUT and *OUTLEN parameters to differentiate between successful
+   decoding and memory error.)  The function returns false if the
+   input was invalid, in which case *OUT is NULL and *OUTLEN is
+   undefined. */
+bool
+base64_decode_alloc_ctx (struct base64_decode_context *ctx,
+			 const char *in, size_t inlen, char **out,
+			 size_t *outlen)
+{
+  /* This may allocate a few bytes too many, depending on input,
+     but it's not worth the extra CPU time to compute the exact size.
+     The exact size is 3 * inlen / 4, minus 1 if the input ends
+     with "=" and minus another 1 if the input ends with "==".
+     Dividing before multiplying avoids the possibility of overflow.  */
+  size_t needlen = 3 * (inlen / 4) + 2;
+
+  *out = malloc (needlen);
+  if (!*out)
+    return true;
+
+  if (!base64_decode_ctx (ctx, in, inlen, *out, &needlen))
+    {
+      free (*out);
+      *out = NULL;
+      return false;
+    }
+
+  if (outlen)
+    *outlen = needlen;
+
+  return true;
+}
diff --git a/lib/base64.h b/lib/base64.h
new file mode 100644
index 0000000..63b6abc
--- /dev/null
+++ b/lib/base64.h
@@ -0,0 +1,61 @@
+/* base64.h -- Encode binary data using printable characters.
+   Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef BASE64_H
+# define BASE64_H
+
+/* Get size_t. */
+# include <stddef.h>
+
+/* Get bool. */
+# include <stdbool.h>
+
+/* This uses that the expression (n+(k-1))/k means the smallest
+   integer >= n/k, i.e., the ceiling of n/k.  */
+# define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
+
+struct base64_decode_context
+{
+  unsigned int i;
+  char buf[4];
+};
+
+extern bool isbase64 (char ch);
+
+extern void base64_encode (const char *restrict in, size_t inlen,
+			   char *restrict out, size_t outlen);
+
+extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
+
+extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
+
+extern bool base64_decode_ctx (struct base64_decode_context *ctx,
+			       const char *restrict in, size_t inlen,
+			       char *restrict out, size_t *outlen);
+
+extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
+				     const char *in, size_t inlen,
+				     char **out, size_t *outlen);
+
+#define base64_decode(in, inlen, out, outlen) \
+	base64_decode_ctx (NULL, in, inlen, out, outlen)
+
+#define base64_decode_alloc(in, inlen, out, outlen) \
+	base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
+
+#endif /* BASE64_H */
diff --git a/lib/stdbool.in.h b/lib/stdbool.in.h
new file mode 100644
index 0000000..cffa0ab
--- /dev/null
+++ b/lib/stdbool.in.h
@@ -0,0 +1,119 @@
+/* Copyright (C) 2001-2003, 2006-2008 Free Software Foundation, Inc.
+   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _GL_STDBOOL_H
+#define _GL_STDBOOL_H
+
+/* ISO C 99 <stdbool.h> for platforms that lack it.  */
+
+/* Usage suggestions:
+
+   Programs that use <stdbool.h> should be aware of some limitations
+   and standards compliance issues.
+
+   Standards compliance:
+
+       - <stdbool.h> must be #included before 'bool', 'false', 'true'
+         can be used.
+
+       - You cannot assume that sizeof (bool) == 1.
+
+       - Programs should not undefine the macros bool, true, and false,
+         as C99 lists that as an "obsolescent feature".
+
+   Limitations of this substitute, when used in a C89 environment:
+
+       - <stdbool.h> must be #included before the '_Bool' type can be used.
+
+       - You cannot assume that _Bool is a typedef; it might be a macro.
+
+       - Bit-fields of type 'bool' are not supported.  Portable code
+         should use 'unsigned int foo : 1;' rather than 'bool foo : 1;'.
+
+       - In C99, casts and automatic conversions to '_Bool' or 'bool' are
+         performed in such a way that every nonzero value gets converted
+         to 'true', and zero gets converted to 'false'.  This doesn't work
+         with this substitute.  With this substitute, only the values 0 and 1
+         give the expected result when converted to _Bool' or 'bool'.
+
+   Also, it is suggested that programs use 'bool' rather than '_Bool';
+   this isn't required, but 'bool' is more common.  */
+
+
+/* 7.16. Boolean type and values */
+
+/* BeOS <sys/socket.h> already #defines false 0, true 1.  We use the same
+   definitions below, but temporarily we have to #undef them.  */
+#if defined __BEOS__ && !defined __HAIKU__
+# include <OS.h> /* defines bool but not _Bool */
+# undef false
+# undef true
+#endif
+
+/* For the sake of symbolic names in gdb, we define true and false as
+   enum constants, not only as macros.
+   It is tempting to write
+      typedef enum { false = 0, true = 1 } _Bool;
+   so that gdb prints values of type 'bool' symbolically. But if we do
+   this, values of type '_Bool' may promote to 'int' or 'unsigned int'
+   (see ISO C 99 6.7.2.2.(4)); however, '_Bool' must promote to 'int'
+   (see ISO C 99 6.3.1.1.(2)).  So we add a negative value to the
+   enum; this ensures that '_Bool' promotes to 'int'.  */
+#if defined __cplusplus || (defined __BEOS__ && !defined __HAIKU__)
+  /* A compiler known to have 'bool'.  */
+  /* If the compiler already has both 'bool' and '_Bool', we can assume they
+     are the same types.  */
+# if !@HAVE__BOOL@
+typedef bool _Bool;
+# endif
+#else
+# if !defined __GNUC__
+   /* If @HAVE__BOOL@:
+        Some HP-UX cc and AIX IBM C compiler versions have compiler bugs when
+        the built-in _Bool type is used.  See
+          http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+          http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
+          http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html
+        Similar bugs are likely with other compilers as well; this file
+        wouldn't be used if <stdbool.h> was working.
+        So we override the _Bool type.
+      If !@HAVE__BOOL@:
+        Need to define _Bool ourselves. As 'signed char' or as an enum type?
+        Use of a typedef, with SunPRO C, leads to a stupid
+          "warning: _Bool is a keyword in ISO C99".
+        Use of an enum type, with IRIX cc, leads to a stupid
+          "warning(1185): enumerated type mixed with another type".
+        Even the existence of an enum type, without a typedef,
+          "Invalid enumerator. (badenum)" with HP-UX cc on Tru64.
+        The only benefit of the enum, debuggability, is not important
+        with these compilers.  So use 'signed char' and no enum.  */
+#  define _Bool signed char
+# else
+   /* With this compiler, trust the _Bool type if the compiler has it.  */
+#  if !@HAVE__BOOL@
+typedef enum { _Bool_must_promote_to_int = -1, false = 0, true = 1 } _Bool;
+#  endif
+# endif
+#endif
+#define bool _Bool
+
+/* The other macros must be usable in preprocessor directives.  */
+#define false 0
+#define true 1
+#define __bool_true_false_are_defined 1
+
+#endif /* _GL_STDBOOL_H */