diff options
Diffstat (limited to 'src/libstrongswan/plugins/dnskey')
| -rw-r--r-- | src/libstrongswan/plugins/dnskey/Makefile.am | 12 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/dnskey/Makefile.in | 571 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/dnskey/dnskey_builder.c | 142 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/dnskey/dnskey_builder.h | 51 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/dnskey/dnskey_plugin.c | 60 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/dnskey/dnskey_plugin.h | 47 |
6 files changed, 883 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/dnskey/Makefile.am b/src/libstrongswan/plugins/dnskey/Makefile.am new file mode 100644 index 000000000..fd020f505 --- /dev/null +++ b/src/libstrongswan/plugins/dnskey/Makefile.am @@ -0,0 +1,12 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan + +AM_CFLAGS = -rdynamic + +plugin_LTLIBRARIES = libstrongswan-dnskey.la + +libstrongswan_dnskey_la_SOURCES = dnskey_plugin.h dnskey_plugin.c \ + dnskey_builder.h dnskey_builder.c + +libstrongswan_dnskey_la_LDFLAGS = -module -avoid-version + diff --git a/src/libstrongswan/plugins/dnskey/Makefile.in b/src/libstrongswan/plugins/dnskey/Makefile.in new file mode 100644 index 000000000..d7d5ff29b --- /dev/null +++ b/src/libstrongswan/plugins/dnskey/Makefile.in @@ -0,0 +1,571 @@ +# Makefile.in generated by automake 1.11 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 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@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@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@ 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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/dnskey/dnskey_builder.c b/src/libstrongswan/plugins/dnskey/dnskey_builder.c new file mode 100644 index 000000000..ba20e7158 --- /dev/null +++ b/src/libstrongswan/plugins/dnskey/dnskey_builder.c @@ -0,0 +1,142 @@ +/* + * Copyright (C) 2009 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. + */ + +#include "dnskey_builder.h" + +#include <debug.h> +#include <credentials/keys/private_key.h> + + +typedef struct dnskey_rr_t dnskey_rr_t; +typedef enum dnskey_algorithm_t dnskey_algorithm_t; + +/** + * Header of a DNSKEY resource record + */ +struct dnskey_rr_t { + u_int16_t flags; + u_int8_t protocol; + u_int8_t algorithm; + u_int8_t data[]; +} __attribute__((__packed__)); + +/** + * DNSSEC algorithms, RFC4034 Appendix A.1. + */ +enum dnskey_algorithm_t { + DNSKEY_ALG_RSA_MD5 = 1, + DNSKEY_ALG_DH = 2, + DNSKEY_ALG_DSA = 3, + DNSKEY_ALG_ECC = 4, + DNSKEY_ALG_RSA_SHA1 = 5, +}; + +/** + * Load a generic public key from a DNSKEY RR blob + */ +static dnskey_public_key_t *parse_public_key(chunk_t blob) +{ + dnskey_rr_t *rr = (dnskey_rr_t*)blob.ptr; + + if (blob.len < sizeof(dnskey_rr_t)) + { + DBG1("DNSKEY too short"); + return NULL; + } + blob = chunk_skip(blob, sizeof(dnskey_rr_t)); + + switch (rr->algorithm) + { + case DNSKEY_ALG_RSA_SHA1: + return lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA, + BUILD_BLOB_DNSKEY, blob, BUILD_END); + default: + DBG1("DNSKEY public key algorithm %d not supported", rr->algorithm); + return NULL; + } +} + +/** + * Load a RSA public key from DNSKEY RR data + */ +static dnskey_public_key_t *parse_rsa_public_key(chunk_t blob) +{ + chunk_t n, e; + + if (blob.len < 3) + { + DBG1("RFC 3110 public key blob too short for exponent length"); + return NULL; + } + + if (blob.ptr[0]) + { + e.len = blob.ptr[0]; + blob = chunk_skip(blob, 1); + } + else + { + e.len = blob.ptr[1] * 256 + blob.ptr[2]; + blob = chunk_skip(blob, 3); + } + e.ptr = blob.ptr; + if (e.len >= blob.len) + { + DBG1("RFC 3110 public key blob too short for exponent"); + return NULL; + } + n = chunk_skip(blob, e.len); + + return lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA, + BUILD_RSA_MODULUS, n, BUILD_RSA_PUB_EXP, e, + BUILD_END); +} + +/** + * See header. + */ +dnskey_public_key_t *dnskey_public_key_load(key_type_t type, va_list args) +{ + chunk_t blob = chunk_empty; + + while (TRUE) + { + switch (va_arg(args, builder_part_t)) + { + case BUILD_BLOB_DNSKEY: + blob = va_arg(args, chunk_t); + continue; + case BUILD_END: + break; + default: + return NULL; + } + break; + } + if (!blob.ptr) + { + return NULL; + } + switch (type) + { + case KEY_ANY: + return parse_public_key(blob); + case KEY_RSA: + return parse_rsa_public_key(blob); + default: + return NULL; + } +} + diff --git a/src/libstrongswan/plugins/dnskey/dnskey_builder.h b/src/libstrongswan/plugins/dnskey/dnskey_builder.h new file mode 100644 index 000000000..16eff3269 --- /dev/null +++ b/src/libstrongswan/plugins/dnskey/dnskey_builder.h @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2009 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 dnskey_public_key dnskey_public_key + * @{ @ingroup dnskey_p + */ + +#ifndef DNSKEY_BUILDER_H_ +#define DNSKEY_BUILDER_H_ + +#include <credentials/builder.h> +#include <credentials/keys/public_key.h> + +typedef struct dnskey_public_key_t dnskey_public_key_t; + +/** + * Public key implementation supporting RFC4034 decoding. + */ +struct dnskey_public_key_t { + + /** + * Implements public_key_t interface. + */ + public_key_t interface; +}; + +/** + * Load a public key in RFC4034 format. + * + * Takes a BUILD_BLOB_DNSKEY to parse the public key. + * + * @param type type of the key, must be KEY_RSA or KEY_ANY + * @param args builder_part_t argument list + * @return built key, NULL on failure + */ +dnskey_public_key_t *dnskey_public_key_load(key_type_t type, va_list args); + +#endif /** DNSKEY_BUILDER_H_ @}*/ diff --git a/src/libstrongswan/plugins/dnskey/dnskey_plugin.c b/src/libstrongswan/plugins/dnskey/dnskey_plugin.c new file mode 100644 index 000000000..83dbe31a1 --- /dev/null +++ b/src/libstrongswan/plugins/dnskey/dnskey_plugin.c @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2009 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. + */ + +#include "dnskey_plugin.h" + +#include <library.h> +#include "dnskey_builder.h" + +typedef struct private_dnskey_plugin_t private_dnskey_plugin_t; + +/** + * private data of dnskey_plugin + */ +struct private_dnskey_plugin_t { + + /** + * public functions + */ + dnskey_plugin_t public; +}; + +/** + * Implementation of dnskey_plugin_t.dnskeytroy + */ +static void destroy(private_dnskey_plugin_t *this) +{ + lib->creds->remove_builder(lib->creds, + (builder_function_t)dnskey_public_key_load); + free(this); +} + +/* + * see header file + */ +plugin_t *plugin_create() +{ + private_dnskey_plugin_t *this = malloc_thing(private_dnskey_plugin_t); + + this->public.plugin.destroy = (void(*)(plugin_t*))destroy; + + lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY, KEY_ANY, + (builder_function_t)dnskey_public_key_load); + lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY, KEY_RSA, + (builder_function_t)dnskey_public_key_load); + + return &this->public.plugin; +} + diff --git a/src/libstrongswan/plugins/dnskey/dnskey_plugin.h b/src/libstrongswan/plugins/dnskey/dnskey_plugin.h new file mode 100644 index 000000000..17790e1c6 --- /dev/null +++ b/src/libstrongswan/plugins/dnskey/dnskey_plugin.h @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2009 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 dnskey_p dnskey + * @ingroup plugins + * + * @defgroup dnskey_plugin dnskey_plugin + * @{ @ingroup dnskey_p + */ + +#ifndef DNSKEY_PLUGIN_H_ +#define DNSKEY_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct dnskey_plugin_t dnskey_plugin_t; + +/** + * Plugin providing RFC4034 public key decoding functions. + */ +struct dnskey_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +/** + * Create a dnskey_plugin instance. + */ +plugin_t *plugin_create(); + +#endif /** DNSKEY_PLUGIN_H_ @}*/ |