diff options
Diffstat (limited to 'src/libstrongswan/plugins/fips_prf')
| -rw-r--r-- | src/libstrongswan/plugins/fips_prf/Makefile.am | 10 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/fips_prf/Makefile.in | 496 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/fips_prf/fips_prf.c | 252 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/fips_prf/fips_prf.h | 59 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/fips_prf/fips_prf_plugin.c | 59 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/fips_prf/fips_prf_plugin.h | 47 |
6 files changed, 923 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/fips_prf/Makefile.am b/src/libstrongswan/plugins/fips_prf/Makefile.am new file mode 100644 index 000000000..73f28825a --- /dev/null +++ b/src/libstrongswan/plugins/fips_prf/Makefile.am @@ -0,0 +1,10 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan + +AM_CFLAGS = -rdynamic + +plugin_LTLIBRARIES = libstrongswan-fips-prf.la + +libstrongswan_fips_prf_la_SOURCES = fips_prf_plugin.h fips_prf_plugin.c fips_prf.c fips_prf.h +libstrongswan_fips_prf_la_LDFLAGS = -module + diff --git a/src/libstrongswan/plugins/fips_prf/Makefile.in b/src/libstrongswan/plugins/fips_prf/Makefile.in new file mode 100644 index 000000000..fa51b0db5 --- /dev/null +++ b/src/libstrongswan/plugins/fips_prf/Makefile.in @@ -0,0 +1,496 @@ +# 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="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +subdir = src/libstrongswan/plugins/fips_prf +DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/configure.in +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +mkinstalldirs = $(install_sh) -d +CONFIG_CLEAN_FILES = +am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; +am__vpath_adj = case $$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_fips_prf_la_LIBADD = +am_libstrongswan_fips_prf_la_OBJECTS = fips_prf_plugin.lo fips_prf.lo +libstrongswan_fips_prf_la_OBJECTS = \ + $(am_libstrongswan_fips_prf_la_OBJECTS) +libstrongswan_fips_prf_la_LINK = $(LIBTOOL) --tag=CC \ + $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \ + 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+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/fips_prf/fips_prf.c b/src/libstrongswan/plugins/fips_prf/fips_prf.c new file mode 100644 index 000000000..df3d130a9 --- /dev/null +++ b/src/libstrongswan/plugins/fips_prf/fips_prf.c @@ -0,0 +1,252 @@ +/* + * Copyright (C) 2006 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: fips_prf.c 3619 2008-03-19 14:02:52Z martin $ + */ + +#include "fips_prf.h" + +#include <arpa/inet.h> + +#include <debug.h> + +typedef struct private_fips_prf_t private_fips_prf_t; + +/** + * Private data of a fips_prf_t object. + */ +struct private_fips_prf_t { + /** + * Public fips_prf_t interface. + */ + fips_prf_t public; + + /** + * key of prf function, "b" long + */ + u_int8_t *key; + + /** + * size of "b" in bytes + */ + size_t b; + + /** + * Keyed SHA1 prf: It does not use SHA1Final operation + */ + prf_t *keyed_prf; + + /** + * G function, either SHA1 or DES + */ + void (*g)(private_fips_prf_t *this, chunk_t c, u_int8_t res[]); +}; + +/** + * sum = (a + b) mod 2 ^ (length * 8) + */ +static void add_mod(size_t length, u_int8_t a[], u_int8_t b[], u_int8_t sum[]) +{ + int i, c = 0; + + for(i = length - 1; i >= 0; i--) + { + u_int32_t tmp; + + tmp = a[i] + b[i] + c; + sum[i] = 0xff & tmp; + c = tmp >> 8; + } +} + +/** + * calculate "chunk mod 2^(length*8)" and save it into buffer + */ +static void chunk_mod(size_t length, chunk_t chunk, u_int8_t buffer[]) +{ + if (chunk.len < length) + { + /* apply seed as least significant bits, others are zero */ + memset(buffer, 0, length - chunk.len); + memcpy(buffer + length - chunk.len, chunk.ptr, chunk.len); + } + else + { + /* use least significant bytes from seed, as we use mod 2^b */ + memcpy(buffer, chunk.ptr + chunk.len - length, length); + } +} + +/** + * Implementation of prf_t.get_bytes. + * + * Test vector: + * + * key: + * 0xbd, 0x02, 0x9b, 0xbe, 0x7f, 0x51, 0x96, 0x0b, + * 0xcf, 0x9e, 0xdb, 0x2b, 0x61, 0xf0, 0x6f, 0x0f, + * 0xeb, 0x5a, 0x38, 0xb6 + * + * seed: + * 0x00 + * + * result: + * 0x20, 0x70, 0xb3, 0x22, 0x3d, 0xba, 0x37, 0x2f, + * 0xde, 0x1c, 0x0f, 0xfc, 0x7b, 0x2e, 0x3b, 0x49, + * 0x8b, 0x26, 0x06, 0x14, 0x3c, 0x6c, 0x18, 0xba, + * 0xcb, 0x0f, 0x6c, 0x55, 0xba, 0xbb, 0x13, 0x78, + * 0x8e, 0x20, 0xd7, 0x37, 0xa3, 0x27, 0x51, 0x16 + */ +static void get_bytes(private_fips_prf_t *this, chunk_t seed, u_int8_t w[]) +{ + int i; + u_int8_t xval[this->b]; + u_int8_t xseed[this->b]; + u_int8_t sum[this->b]; + u_int8_t *xkey = this->key; + u_int8_t one[this->b]; + chunk_t xval_chunk = chunk_from_buf(xval); + + memset(one, 0, this->b); + one[this->b - 1] = 0x01; + + /* 3.1 */ + chunk_mod(this->b, seed, xseed); + + /* 3.2 */ + for (i = 0; i < 2; i++) /* twice */ + { + /* a. XVAL = (XKEY + XSEED j) mod 2^b */ + add_mod(this->b, xkey, xseed, xval); + DBG3("XVAL %b", xval, this->b); + /* b. wi = G(t, XVAL ) */ + this->g(this, xval_chunk, &w[i * this->b]); + DBG3("w[%d] %b", i, &w[i * this->b], this->b); + /* c. XKEY = (1 + XKEY + wi) mod 2b */ + add_mod(this->b, xkey, &w[i * this->b], sum); + add_mod(this->b, sum, one, xkey); + DBG3("XKEY %b", xkey, this->b); + } + + /* 3.3 done already, mod q not used */ +} + +/** + * Implementation of prf_t.get_block_size. + */ +static size_t get_block_size(private_fips_prf_t *this) +{ + return 2 * this->b; +} +/** + * Implementation of prf_t.allocate_bytes. + */ +static void allocate_bytes(private_fips_prf_t *this, chunk_t seed, chunk_t *chunk) +{ + *chunk = chunk_alloc(get_block_size(this)); + get_bytes(this, seed, chunk->ptr); +} + +/** + * Implementation of prf_t.get_key_size. + */ +static size_t get_key_size(private_fips_prf_t *this) +{ + return this->b; +} + +/** + * Implementation of prf_t.set_key. + */ +static void set_key(private_fips_prf_t *this, chunk_t key) +{ + /* save key as "key mod 2^b" */ + chunk_mod(this->b, key, this->key); +} + +/** + * Implementation of the G() function based on SHA1 + */ +void g_sha1(private_fips_prf_t *this, chunk_t c, u_int8_t res[]) +{ + u_int8_t buf[64]; + + if (c.len < sizeof(buf)) + { + /* pad c with zeros */ + memset(buf, 0, sizeof(buf)); + memcpy(buf, c.ptr, c.len); + c.ptr = buf; + c.len = sizeof(buf); + } + else + { + /* not more than 512 bits can be G()-ed */ + c.len = sizeof(buf); + } + + /* use the keyed hasher, but use an empty key to use SHA1 IV */ + this->keyed_prf->set_key(this->keyed_prf, chunk_empty); + this->keyed_prf->get_bytes(this->keyed_prf, c, res); +} + +/** + * Implementation of prf_t.destroy. + */ +static void destroy(private_fips_prf_t *this) +{ + this->keyed_prf->destroy(this->keyed_prf); + free(this->key); + free(this); +} + +/* + * Described in header. + */ +fips_prf_t *fips_prf_create(pseudo_random_function_t algo) +{ + private_fips_prf_t *this = malloc_thing(private_fips_prf_t); + + 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; + + switch (algo) + { + case PRF_FIPS_SHA1_160: + { + this->g = g_sha1; + this->b = 20; + this->keyed_prf = lib->crypto->create_prf(lib->crypto, PRF_KEYED_SHA1); + if (this->keyed_prf == NULL) + { + free(this); + return NULL; + } + break; + } + case PRF_FIPS_DES: + /* not implemented yet */ + default: + free(this); + return NULL; + } + this->key = malloc(this->b); + + return &this->public; +} + diff --git a/src/libstrongswan/plugins/fips_prf/fips_prf.h b/src/libstrongswan/plugins/fips_prf/fips_prf.h new file mode 100644 index 000000000..3fead6b9b --- /dev/null +++ b/src/libstrongswan/plugins/fips_prf/fips_prf.h @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2006-2008 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 fips_prf fips_prf + * @{ @ingroup fips_prf_p + */ + +#ifndef FIPS_PRF_H_ +#define FIPS_PRF_H_ + +typedef struct fips_prf_t fips_prf_t; + +#include <library.h> +#include <crypto/prfs/prf.h> +#include <crypto/hashers/hasher.h> + +/** + * Implementation of prf_t using the FIPS 186-2-change1 standard. + * + * FIPS defines a "General Purpose Random Number Generator" (Revised + * Algorithm for Computing m values of x (Appendix 3.1 of FIPS 186-2)). This + * implementation is not intended for private key generation and therefore does + * not include the "mod q" operation (see FIPS 186-2-change1 p74). + * The FIPS PRF is stateful; the key changes every time when bytes are acquired. + */ +struct fips_prf_t { + + /** + * Generic prf_t interface for this fips_prf_t class. + */ + prf_t prf_interface; +}; + +/** + * Creates a new fips_prf_t object. + * + * FIPS 186-2 defines G() functions used in the PRF function. It can + * be implemented either based on SHA1 or DES. + * The G() function is selected using the algo parameter. + * + * @param algo specific FIPS PRF implementation, specifies G() function + * @return fips_prf_t object, NULL if not supported. + */ +fips_prf_t *fips_prf_create(pseudo_random_function_t algo); + +#endif /* FIPS_PRF_H_ @}*/ diff --git a/src/libstrongswan/plugins/fips_prf/fips_prf_plugin.c b/src/libstrongswan/plugins/fips_prf/fips_prf_plugin.c new file mode 100644 index 000000000..60fce8632 --- /dev/null +++ b/src/libstrongswan/plugins/fips_prf/fips_prf_plugin.c @@ -0,0 +1,59 @@ +/* + * 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: fips_prf_plugin.c 3488 2008-02-21 15:10:02Z martin $ + */ + +#include "fips_prf_plugin.h" + +#include <library.h> +#include "fips_prf.h" + +typedef struct private_fips_prf_plugin_t private_fips_prf_plugin_t; + +/** + * private data of fips_prf_plugin + */ +struct private_fips_prf_plugin_t { + + /** + * public functions + */ + fips_prf_plugin_t public; +}; + +/** + * Implementation of fips_prf_plugin_t.destroy + */ +static void destroy(private_fips_prf_plugin_t *this) +{ + lib->crypto->remove_prf(lib->crypto, + (prf_constructor_t)fips_prf_create); + free(this); +} + +/* + * see header file + */ +plugin_t *plugin_create() +{ + private_fips_prf_plugin_t *this = malloc_thing(private_fips_prf_plugin_t); + + this->public.plugin.destroy = (void(*)(plugin_t*))destroy; + + lib->crypto->add_prf(lib->crypto, PRF_FIPS_SHA1_160, + (prf_constructor_t)fips_prf_create); + + return &this->public.plugin; +} diff --git a/src/libstrongswan/plugins/fips_prf/fips_prf_plugin.h b/src/libstrongswan/plugins/fips_prf/fips_prf_plugin.h new file mode 100644 index 000000000..6816eb66f --- /dev/null +++ b/src/libstrongswan/plugins/fips_prf/fips_prf_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 fips_prf_p fips_prf + * @ingroup plugins + * + * @defgroup fips_prf_plugin fips_prf_plugin + * @{ @ingroup fips_prf_p + */ + +#ifndef FIPS_PRF_PLUGIN_H_ +#define FIPS_PRF_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct fips_prf_plugin_t fips_prf_plugin_t; + +/** + * Plugin implementing the fips_prf algorithm in software. + */ +struct fips_prf_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +/** + * Create a fips_prf_plugin instance. + */ +plugin_t *plugin_create(); + +#endif /* FIPS_PRF_PLUGIN_H_ @}*/ |