diff options
Diffstat (limited to 'src/libstrongswan/plugins/xcbc')
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/Makefile.am | 11 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/Makefile.in | 499 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc.c | 299 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc.h | 78 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc_plugin.c | 65 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc_plugin.h | 47 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc_prf.c | 131 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc_prf.h | 50 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc_signer.c | 177 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/xcbc/xcbc_signer.h | 47 |
10 files changed, 1404 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/xcbc/Makefile.am b/src/libstrongswan/plugins/xcbc/Makefile.am new file mode 100644 index 000000000..1b10d21f8 --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/Makefile.am @@ -0,0 +1,11 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan + +AM_CFLAGS = -rdynamic + +plugin_LTLIBRARIES = libstrongswan-xcbc.la + +libstrongswan_xcbc_la_SOURCES = xcbc_plugin.h xcbc_plugin.c xcbc.h xcbc.c \ + xcbc_prf.h xcbc_prf.c xcbc_signer.h xcbc_signer.c +libstrongswan_xcbc_la_LDFLAGS = -module + diff --git a/src/libstrongswan/plugins/xcbc/Makefile.in b/src/libstrongswan/plugins/xcbc/Makefile.in new file mode 100644 index 000000000..3fdf46955 --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/Makefile.in @@ -0,0 +1,499 @@ +# 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@ + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +subdir = src/libstrongswan/plugins/xcbc +DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/configure.in +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +mkinstalldirs = $(install_sh) -d +CONFIG_CLEAN_FILES = +am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; +am__vpath_adj = case $$p in \ + $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \ + *) f=$$p;; \ + esac; +am__strip_dir = `echo $$p | sed -e 's|^.*/||'`; +am__installdirs = "$(DESTDIR)$(plugindir)" +pluginLTLIBRARIES_INSTALL = $(INSTALL) +LTLIBRARIES = $(plugin_LTLIBRARIES) +libstrongswan_xcbc_la_LIBADD = +am_libstrongswan_xcbc_la_OBJECTS = xcbc_plugin.lo xcbc.lo xcbc_prf.lo \ + xcbc_signer.lo +libstrongswan_xcbc_la_OBJECTS = $(am_libstrongswan_xcbc_la_OBJECTS) +libstrongswan_xcbc_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \ + $(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \ + $(libstrongswan_xcbc_la_LDFLAGS) $(LDFLAGS) -o $@ +DEFAULT_INCLUDES = -I.@am__isrc@ +depcomp = $(SHELL) $(top_srcdir)/depcomp +am__depfiles_maybe = depfiles +COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \ + $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ + --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \ + $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +CCLD = $(CC) +LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ + --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \ + $(LDFLAGS) -o $@ +SOURCES = $(libstrongswan_xcbc_la_SOURCES) +DIST_SOURCES = $(libstrongswan_xcbc_la_SOURCES) +ETAGS = etags +CTAGS = ctags +DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST) +ACLOCAL = @ACLOCAL@ +AMTAR = @AMTAR@ +AR = @AR@ +AUTOCONF = @AUTOCONF@ +AUTOHEADER = @AUTOHEADER@ +AUTOMAKE = @AUTOMAKE@ +AWK = @AWK@ +CC = @CC@ +CCDEPMODE = @CCDEPMODE@ +CFLAGS 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$(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \ + *) \ + echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \ + cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \ + esac; + +$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES) + cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh + +$(top_srcdir)/configure: $(am__configure_deps) + cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh +$(ACLOCAL_M4): $(am__aclocal_m4_deps) + cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh +install-pluginLTLIBRARIES: $(plugin_LTLIBRARIES) + @$(NORMAL_INSTALL) + test -z "$(plugindir)" || $(MKDIR_P) "$(DESTDIR)$(plugindir)" + @list='$(plugin_LTLIBRARIES)'; for p in $$list; do \ + if test -f $$p; then \ + f=$(am__strip_dir) \ + echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(pluginLTLIBRARIES_INSTALL) $(INSTALL_STRIP_FLAG) '$$p' 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+distclean-generic: + -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES) + +maintainer-clean-generic: + @echo "This command is intended for maintainers to use" + @echo "it deletes files that may require special tools to rebuild." +clean: clean-am + +clean-am: clean-generic clean-libtool clean-pluginLTLIBRARIES \ + mostlyclean-am + +distclean: distclean-am + -rm -rf ./$(DEPDIR) + -rm -f Makefile +distclean-am: clean-am distclean-compile distclean-generic \ + distclean-tags + +dvi: dvi-am + +dvi-am: + +html: html-am + +info: info-am + +info-am: + +install-data-am: install-pluginLTLIBRARIES + +install-dvi: install-dvi-am + +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 + +installcheck-am: + +maintainer-clean: maintainer-clean-am + -rm -rf ./$(DEPDIR) + -rm -f Makefile +maintainer-clean-am: distclean-am maintainer-clean-generic + +mostlyclean: mostlyclean-am + +mostlyclean-am: mostlyclean-compile mostlyclean-generic \ + mostlyclean-libtool + +pdf: pdf-am + +pdf-am: + +ps: ps-am + +ps-am: + +uninstall-am: uninstall-pluginLTLIBRARIES + +.MAKE: install-am install-strip + +.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \ + clean-libtool clean-pluginLTLIBRARIES ctags 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-pluginLTLIBRARIES \ + install-ps install-ps-am install-strip installcheck \ + installcheck-am installdirs maintainer-clean \ + maintainer-clean-generic mostlyclean mostlyclean-compile \ + mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ + tags uninstall uninstall-am uninstall-pluginLTLIBRARIES + +# 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/src/libstrongswan/plugins/xcbc/xcbc.c b/src/libstrongswan/plugins/xcbc/xcbc.c new file mode 100644 index 000000000..ab37eca40 --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc.c @@ -0,0 +1,299 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General xcbc License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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 xcbc License + * for more details. + * + * $Id: xcbc.c 3589 2008-03-13 14:14:44Z martin $ + */ + +#include <string.h> + +#include "xcbc.h" + +#include <debug.h> + +typedef struct private_xcbc_t private_xcbc_t; + +/** + * Private data of a xcbc_t object. + * + * The variable names are the same as in the RFC. + */ +struct private_xcbc_t { + /** + * Public xcbc_t interface. + */ + xcbc_t xcbc; + + /** + * Block size, in bytes + */ + u_int8_t b; + + /** + * crypter using k1 + */ + crypter_t *k1; + + /** + * k2 + */ + u_int8_t *k2; + + /** + * k3 + */ + u_int8_t *k3; + + /** + * E + */ + u_int8_t *e; + + /** + * remaining, unprocessed bytes in append mode + */ + u_int8_t *remaining; + + /** + * number of bytes in remaining + */ + int remaining_bytes; + + /** + * TRUE if we have zero bytes to xcbc in final() + */ + bool zero; +}; + +/** + * xcbc supplied data, but do not run final operation + */ +static void update(private_xcbc_t *this, chunk_t data) +{ + chunk_t iv; + + if (data.len) + { + this->zero = FALSE; + } + + if (this->remaining_bytes + data.len <= this->b) + { /* no complete block, just copy into remaining */ + memcpy(this->remaining + this->remaining_bytes, data.ptr, data.len); + this->remaining_bytes += data.len; + return; + } + + iv = chunk_alloca(this->b); + memset(iv.ptr, 0, iv.len); + + /* (3) For each block M[i], where i = 1 ... n-1: + * XOR M[i] with E[i-1], then encrypt the result with Key K1, + * yielding E[i]. + */ + + /* append data to remaining bytes, process block M[1] */ + memcpy(this->remaining + this->remaining_bytes, data.ptr, + this->b - this->remaining_bytes); + data = chunk_skip(data, this->b - this->remaining_bytes); + memxor(this->e, this->remaining, this->b); + this->k1->encrypt(this->k1, chunk_create(this->e, this->b), iv, NULL); + + /* process blocks M[2] ... M[n-1] */ + while (data.len > this->b) + { + memcpy(this->remaining, data.ptr, this->b); + data = chunk_skip(data, this->b); + memxor(this->e, this->remaining, this->b); + this->k1->encrypt(this->k1, chunk_create(this->e, this->b), iv, NULL); + } + + /* store remaining bytes of block M[n] */ + memcpy(this->remaining, data.ptr, data.len); + this->remaining_bytes = data.len; +} + +/** + * run last round, data is in this->e + */ +static void final(private_xcbc_t *this, u_int8_t *out) +{ + chunk_t iv; + + iv = chunk_alloca(this->b); + memset(iv.ptr, 0, iv.len); + + /* (4) For block M[n]: */ + if (this->remaining_bytes == this->b && !this->zero) + { + /* a) If the blocksize of M[n] is 128 bits: + * XOR M[n] with E[n-1] and Key K2, then encrypt the result with + * Key K1, yielding E[n]. + */ + memxor(this->e, this->remaining, this->b); + memxor(this->e, this->k2, this->b); + this->k1->encrypt(this->k1, chunk_create(this->e, this->b), iv, NULL); + } + else + { + /* b) If the blocksize of M[n] is less than 128 bits: + * + * i) Pad M[n] with a single "1" bit, followed by the number of + * "0" bits (possibly none) required to increase M[n]'s + * blocksize to 128 bits. + */ + if (this->remaining_bytes < this->b) + { + this->remaining[this->remaining_bytes] = 0x80; + while (++this->remaining_bytes < this->b) + { + this->remaining[this->remaining_bytes] = 0x00; + } + } + /* ii) XOR M[n] with E[n-1] and Key K3, then encrypt the result + * with Key K1, yielding E[n]. + */ + memxor(this->e, this->remaining, this->b); + memxor(this->e, this->k3, this->b); + this->k1->encrypt(this->k1, chunk_create(this->e, this->b), iv, NULL); + } + + memcpy(out, this->e, this->b); + + /* (2) Define E[0] = 0x00000000000000000000000000000000 */ + memset(this->e, 0, this->b); + this->remaining_bytes = 0; + this->zero = TRUE; +} + +/** + * Implementation of xcbc_t.get_mac. + */ +static void get_mac(private_xcbc_t *this, chunk_t data, u_int8_t *out) +{ + /* update E, do not process last block */ + update(this, data); + + if (out) + { /* if not in append mode, process last block and output result */ + final(this, out); + } +} + +/** + * Implementation of xcbc_t.get_block_size. + */ +static size_t get_block_size(private_xcbc_t *this) +{ + return this->b; +} + +/** + * Implementation of xcbc_t.set_key. + */ +static void set_key(private_xcbc_t *this, chunk_t key) +{ + chunk_t iv, k1, lengthened; + + /* we support variable keys from RFC4434 */ + if (key.len == this->b) + { + lengthened = key; + } + else if (key.len < this->b) + { /* pad short keys */ + lengthened = chunk_alloca(this->b); + memset(lengthened.ptr, 0, lengthened.len); + memcpy(lengthened.ptr, key.ptr, key.len); + } + else + { /* shorten key using xcbc */ + lengthened = chunk_alloca(this->b); + memset(lengthened.ptr, 0, lengthened.len); + set_key(this, lengthened); + get_mac(this, key, lengthened.ptr); + } + + k1 = chunk_alloca(this->b); + iv = chunk_alloca(this->b); + memset(iv.ptr, 0, iv.len); + + /* + * (1) Derive 3 128-bit keys (K1, K2 and K3) from the 128-bit secret + * key K, as follows: + * K1 = 0x01010101010101010101010101010101 encrypted with Key K + * K2 = 0x02020202020202020202020202020202 encrypted with Key K + * K3 = 0x03030303030303030303030303030303 encrypted with Key K + */ + this->k1->set_key(this->k1, lengthened); + memset(this->k2, 0x02, this->b); + this->k1->encrypt(this->k1, chunk_create(this->k2, this->b), iv, NULL); + memset(this->k3, 0x03, this->b); + this->k1->encrypt(this->k1, chunk_create(this->k3, this->b), iv, NULL); + memset(k1.ptr, 0x01, this->b); + this->k1->encrypt(this->k1, k1, iv, NULL); + this->k1->set_key(this->k1, k1); +} + +/** + * Implementation of xcbc_t.destroy. + */ +static void destroy(private_xcbc_t *this) +{ + this->k1->destroy(this->k1); + free(this->k2); + free(this->k3); + free(this->e); + free(this->remaining); + free(this); +} + +/* + * Described in header + */ +xcbc_t *xcbc_create(encryption_algorithm_t algo, size_t key_size) +{ + private_xcbc_t *this; + crypter_t *crypter; + + crypter = lib->crypto->create_crypter(lib->crypto, algo, key_size); + if (!crypter) + { + return NULL; + } + /* input and output of crypter must be equal for xcbc */ + if (crypter->get_block_size(crypter) != key_size) + { + crypter->destroy(crypter); + return NULL; + } + + this = malloc_thing(private_xcbc_t); + this->xcbc.get_mac = (void (*)(xcbc_t *,chunk_t,u_int8_t*))get_mac; + this->xcbc.get_block_size = (size_t (*)(xcbc_t *))get_block_size; + this->xcbc.set_key = (void (*)(xcbc_t *,chunk_t))set_key; + this->xcbc.destroy = (void (*)(xcbc_t *))destroy; + + this->b = crypter->get_block_size(crypter); + this->k1 = crypter; + this->k2 = malloc(this->b); + this->k3 = malloc(this->b); + this->e = malloc(this->b); + memset(this->e, 0, this->b); + this->remaining = malloc(this->b); + this->remaining_bytes = 0; + this->zero = TRUE; + + return &this->xcbc; +} + diff --git a/src/libstrongswan/plugins/xcbc/xcbc.h b/src/libstrongswan/plugins/xcbc/xcbc.h new file mode 100644 index 000000000..81812442e --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc.h @@ -0,0 +1,78 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * 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 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup xcbc xcbc + * @{ @ingroup xcbc_p + */ + +#ifndef XCBC_H_ +#define XCBC_H_ + +typedef struct xcbc_t xcbc_t; + +#include <crypto/hashers/hasher.h> + +/** + * Message authentication using CBC crypter. + * + * This class implements the message authenticaion algorithm + * described in RFC3566. + */ +struct xcbc_t { + + /** + * Generate message authentication code. + * + * If buffer is NULL, no result is given back. A next call will + * append the data to already supplied data. If buffer is not NULL, + * the mac of all apended data is calculated, returned and the + * state of the xcbc_t is reseted. + * + * @param data chunk of data to authenticate + * @param buffer pointer where the generated bytes will be written + */ + void (*get_mac) (xcbc_t *this, chunk_t data, u_int8_t *buffer); + + /** + * Get the block size of this xcbc_t object. + * + * @return block size in bytes + */ + size_t (*get_block_size) (xcbc_t *this); + + /** + * Set the key for this xcbc_t object. + * + * @param key key to set + */ + void (*set_key) (xcbc_t *this, chunk_t key); + + /** + * Destroys a xcbc_t object. + */ + void (*destroy) (xcbc_t *this); +}; + +/** + * Creates a new xcbc_t object. + * + * @param algo underlying crypto algorithm + * @param key_size key size to use, if required for algorithm + * @return xcbc_t object, NULL if not supported + */ +xcbc_t *xcbc_create(encryption_algorithm_t algo, size_t key_size); + +#endif /*xcbc_H_ @}*/ diff --git a/src/libstrongswan/plugins/xcbc/xcbc_plugin.c b/src/libstrongswan/plugins/xcbc/xcbc_plugin.c new file mode 100644 index 000000000..f1501476f --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc_plugin.c @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * 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 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + * + * $Id$ + */ + +#include "xcbc_plugin.h" + +#include <library.h> +#include "xcbc_signer.h" +#include "xcbc_prf.h" + +typedef struct private_xcbc_plugin_t private_xcbc_plugin_t; + +/** + * private data of xcbc_plugin + */ +struct private_xcbc_plugin_t { + + /** + * public functions + */ + xcbc_plugin_t public; +}; + +/** + * Implementation of xcbc_plugin_t.xcbctroy + */ +static void destroy(private_xcbc_plugin_t *this) +{ + lib->crypto->remove_prf(lib->crypto, + (prf_constructor_t)xcbc_prf_create); + lib->crypto->remove_signer(lib->crypto, + (signer_constructor_t)xcbc_signer_create); + free(this); +} + +/* + * see header file + */ +plugin_t *plugin_create() +{ + private_xcbc_plugin_t *this = malloc_thing(private_xcbc_plugin_t); + + this->public.plugin.destroy = (void(*)(plugin_t*))destroy; + + lib->crypto->add_prf(lib->crypto, PRF_AES128_XCBC, + (prf_constructor_t)xcbc_prf_create); + lib->crypto->add_signer(lib->crypto, AUTH_AES_XCBC_96, + (signer_constructor_t)xcbc_signer_create); + + return &this->public.plugin; +} + diff --git a/src/libstrongswan/plugins/xcbc/xcbc_plugin.h b/src/libstrongswan/plugins/xcbc/xcbc_plugin.h new file mode 100644 index 000000000..728d84690 --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc_plugin.h @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * 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 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup xcbc_p xcbc + * @ingroup plugins + * + * @defgroup xcbc_plugin xcbc_plugin + * @{ @ingroup xcbc_p + */ + +#ifndef XCBC_PLUGIN_H_ +#define XCBC_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct xcbc_plugin_t xcbc_plugin_t; + +/** + * Plugin implementing xcbc algorithm to provide crypter based PRF and signers. + */ +struct xcbc_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +/** + * Create a xcbc_plugin instance. + */ +plugin_t *plugin_create(); + +#endif /* XCBC_PLUGIN_H_ @}*/ diff --git a/src/libstrongswan/plugins/xcbc/xcbc_prf.c b/src/libstrongswan/plugins/xcbc/xcbc_prf.c new file mode 100644 index 000000000..03056594d --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc_prf.c @@ -0,0 +1,131 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * 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 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + * + * $Id$ + */ + +#include "xcbc_prf.h" + +#include "xcbc.h" + +typedef struct private_xcbc_prf_t private_xcbc_prf_t; + +/** + * Private data of a xcbc_prf_t object. + */ +struct private_xcbc_prf_t { + + /** + * Public xcbc_prf_t interface. + */ + xcbc_prf_t public; + + /** + * xcbc to use for generation. + */ + xcbc_t *xcbc; +}; + +/** + * Implementation of prf_t.get_bytes. + */ +static void get_bytes(private_xcbc_prf_t *this, chunk_t seed, u_int8_t *buffer) +{ + this->xcbc->get_mac(this->xcbc, seed, buffer); +} + +/** + * Implementation of prf_t.allocate_bytes. + */ +static void allocate_bytes(private_xcbc_prf_t *this, chunk_t seed, chunk_t *chunk) +{ + if (chunk) + { + *chunk = chunk_alloc(this->xcbc->get_block_size(this->xcbc)); + get_bytes(this, seed, chunk->ptr); + } + else + { + get_bytes(this, seed, NULL); + } +} + +/** + * Implementation of prf_t.get_block_size. + */ +static size_t get_block_size(private_xcbc_prf_t *this) +{ + return this->xcbc->get_block_size(this->xcbc); +} + +/** + * Implementation of prf_t.get_block_size. + */ +static size_t get_key_size(private_xcbc_prf_t *this) +{ + /* in xcbc, block and key size are always equal */ + return this->xcbc->get_block_size(this->xcbc); +} + +/** + * Implementation of prf_t.set_key. + */ +static void set_key(private_xcbc_prf_t *this, chunk_t key) +{ + this->xcbc->set_key(this->xcbc, key); +} + +/** + * Implementation of prf_t.destroy. + */ +static void destroy(private_xcbc_prf_t *this) +{ + this->xcbc->destroy(this->xcbc); + free(this); +} + +/* + * Described in header. + */ +xcbc_prf_t *xcbc_prf_create(pseudo_random_function_t algo) +{ + private_xcbc_prf_t *this; + xcbc_t *xcbc; + + switch (algo) + { + case PRF_AES128_XCBC: + xcbc = xcbc_create(ENCR_AES_CBC, 16); + break; + default: + return NULL; + } + if (!xcbc) + { + return NULL; + } + + this = malloc_thing(private_xcbc_prf_t); + this->xcbc = xcbc; + + this->public.prf_interface.get_bytes = (void (*) (prf_t *,chunk_t,u_int8_t*))get_bytes; + this->public.prf_interface.allocate_bytes = (void (*) (prf_t*,chunk_t,chunk_t*))allocate_bytes; + this->public.prf_interface.get_block_size = (size_t (*) (prf_t*))get_block_size; + this->public.prf_interface.get_key_size = (size_t (*) (prf_t*))get_key_size; + this->public.prf_interface.set_key = (void (*) (prf_t *,chunk_t))set_key; + this->public.prf_interface.destroy = (void (*) (prf_t *))destroy; + + return &this->public; +} + diff --git a/src/libstrongswan/plugins/xcbc/xcbc_prf.h b/src/libstrongswan/plugins/xcbc/xcbc_prf.h new file mode 100644 index 000000000..e8692ae23 --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc_prf.h @@ -0,0 +1,50 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * 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 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup xcbc_prf xcbc_prf + * @{ @ingroup xcbc_p + */ + +#ifndef PRF_XCBC_H_ +#define PRF_XCBC_H_ + +typedef struct xcbc_prf_t xcbc_prf_t; + +#include <crypto/prfs/prf.h> + +/** + * Implementation of prf_t on CBC block cipher using XCBC, RFC3664/RFC4434. + * + * This simply wraps a xcbc_t in a prf_t. More a question of + * interface matching. + */ +struct xcbc_prf_t { + + /** + * Generic prf_t interface for this xcbc_prf_t class. + */ + prf_t prf_interface; +}; + +/** + * Creates a new xcbc_prf_t object. + * + * @param algo algorithm to implement + * @return xcbc_prf_t object, NULL if hash not supported + */ +xcbc_prf_t *xcbc_prf_create(pseudo_random_function_t algo); + +#endif /*PRF_XCBC_SHA1_H_ @}*/ diff --git a/src/libstrongswan/plugins/xcbc/xcbc_signer.c b/src/libstrongswan/plugins/xcbc/xcbc_signer.c new file mode 100644 index 000000000..29eb2d25b --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc_signer.c @@ -0,0 +1,177 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * 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 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + * + * $Id$ + */ + +#include <string.h> + +#include "xcbc_signer.h" +#include "xcbc.h" + +typedef struct private_xcbc_signer_t private_xcbc_signer_t; + +/** + * Private data structure with signing context. + */ +struct private_xcbc_signer_t { + + /** + * Public interface of xcbc_signer_t. + */ + xcbc_signer_t public; + + /** + * Assigned xcbc function. + */ + xcbc_t *xcbc; + + /** + * Block size (truncation of XCBC MAC) + */ + size_t block_size; +}; + +/** + * Implementation of signer_t.get_signature. + */ +static void get_signature(private_xcbc_signer_t *this, + chunk_t data, u_int8_t *buffer) +{ + if (buffer == NULL) + { /* append mode */ + this->xcbc->get_mac(this->xcbc, data, NULL); + } + else + { + u_int8_t mac[this->xcbc->get_block_size(this->xcbc)]; + + this->xcbc->get_mac(this->xcbc, data, mac); + memcpy(buffer, mac, this->block_size); + } +} + +/** + * Implementation of signer_t.allocate_signature. + */ +static void allocate_signature (private_xcbc_signer_t *this, + chunk_t data, chunk_t *chunk) +{ + if (chunk == NULL) + { /* append mode */ + this->xcbc->get_mac(this->xcbc, data, NULL); + } + else + { + u_int8_t mac[this->xcbc->get_block_size(this->xcbc)]; + + this->xcbc->get_mac(this->xcbc, data, mac); + + chunk->ptr = malloc(this->block_size); + chunk->len = this->block_size; + + memcpy(chunk->ptr, mac, this->block_size); + } +} + +/** + * Implementation of signer_t.verify_signature. + */ +static bool verify_signature(private_xcbc_signer_t *this, + chunk_t data, chunk_t signature) +{ + u_int8_t mac[this->xcbc->get_block_size(this->xcbc)]; + + if (signature.len != this->block_size) + { + return FALSE; + } + + this->xcbc->get_mac(this->xcbc, data, mac); + return memeq(signature.ptr, mac, this->block_size); +} + +/** + * Implementation of signer_t.get_key_size. + */ +static size_t get_key_size(private_xcbc_signer_t *this) +{ + return this->xcbc->get_block_size(this->xcbc); +} + +/** + * Implementation of signer_t.get_block_size. + */ +static size_t get_block_size(private_xcbc_signer_t *this) +{ + return this->block_size; +} + +/** + * Implementation of signer_t.set_key. + */ +static void set_key(private_xcbc_signer_t *this, chunk_t key) +{ + this->xcbc->set_key(this->xcbc, key); +} + +/** + * Implementation of signer_t.destroy. + */ +static status_t destroy(private_xcbc_signer_t *this) +{ + this->xcbc->destroy(this->xcbc); + free(this); + return SUCCESS; +} + +/* + * Described in header + */ +xcbc_signer_t *xcbc_signer_create(integrity_algorithm_t algo) +{ + private_xcbc_signer_t *this; + size_t trunc; + xcbc_t *xcbc; + + switch (algo) + { + case AUTH_AES_XCBC_96: + xcbc = xcbc_create(ENCR_AES_CBC, 16); + trunc = 12; + break; + default: + return NULL; + } + if (xcbc == NULL) + { + return NULL; + } + + this = malloc_thing(private_xcbc_signer_t); + this->xcbc = xcbc; + this->block_size = min(trunc, xcbc->get_block_size(xcbc)); + + /* interface functions */ + this->public.signer_interface.get_signature = (void (*) (signer_t*, chunk_t, u_int8_t*))get_signature; + this->public.signer_interface.allocate_signature = (void (*) (signer_t*, chunk_t, chunk_t*))allocate_signature; + this->public.signer_interface.verify_signature = (bool (*) (signer_t*, chunk_t, chunk_t))verify_signature; + this->public.signer_interface.get_key_size = (size_t (*) (signer_t*))get_key_size; + this->public.signer_interface.get_block_size = (size_t (*) (signer_t*))get_block_size; + this->public.signer_interface.set_key = (void (*) (signer_t*,chunk_t))set_key; + this->public.signer_interface.destroy = (void (*) (signer_t*))destroy; + + return &this->public; +} + diff --git a/src/libstrongswan/plugins/xcbc/xcbc_signer.h b/src/libstrongswan/plugins/xcbc/xcbc_signer.h new file mode 100644 index 000000000..c7eff7e17 --- /dev/null +++ b/src/libstrongswan/plugins/xcbc/xcbc_signer.h @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2008 Martin Willi + * Hochschule fuer Technik Rapperswil + * + * 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 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup xcbc_signer xcbc_signer + * @{ @ingroup xcbc_p + */ + +#ifndef xcbc_SIGNER_H_ +#define xcbc_SIGNER_H_ + +typedef struct xcbc_signer_t xcbc_signer_t; + +#include <crypto/signers/signer.h> + +/** + * Implementation of signer_t based on CBC symmetric cypher. XCBC, RFC3566. + */ +struct xcbc_signer_t { + + /** + * generic signer_t interface for this signer + */ + signer_t signer_interface; +}; + +/** + * Creates a new xcbc_signer_t. + * + * @param algo algorithm to implement + * @return xcbc_signer_t, NULL if not supported + */ +xcbc_signer_t *xcbc_signer_create(integrity_algorithm_t algo); + +#endif /*xcbc_SIGNER_H_ @}*/ |