implemented a pgp plugin providing PGP key parsing builders
This commit is contained in:
Martin Willi
parent
4e3d1e804e
commit
9493dd2ce0
17
configure.in
17
configure.in
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@ -298,6 +298,17 @@ AC_ARG_ENABLE(
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pkcs1=true
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)
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AC_ARG_ENABLE(
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[pgp],
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AS_HELP_STRING([--disable-pkcs],[disable PGP key decoding plugin. (default is NO).]),
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[if test x$enableval = xyes; then
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pgp=true
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else
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pgp=false
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fi],
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pgp=true
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)
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AC_ARG_ENABLE(
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[pem],
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AS_HELP_STRING([--disable-pem],[disable PEM decoding plugin. (default is NO).]),
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@ -1207,6 +1218,10 @@ if test x$pkcs1 = xtrue; then
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libstrongswan_plugins=${libstrongswan_plugins}" pkcs1"
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pluto_plugins=${pluto_plugins}" pkcs1"
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fi
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if test x$pgp = xtrue; then
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libstrongswan_plugins=${libstrongswan_plugins}" pgp"
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pluto_plugins=${pluto_plugins}" pgp"
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fi
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if test x$pem = xtrue; then
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libstrongswan_plugins=${libstrongswan_plugins}" pem"
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pluto_plugins=${pluto_plugins}" pem"
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@ -1268,6 +1283,7 @@ AM_CONDITIONAL(USE_RANDOM, test x$random = xtrue)
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AM_CONDITIONAL(USE_X509, test x$x509 = xtrue)
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AM_CONDITIONAL(USE_PUBKEY, test x$pubkey = xtrue)
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AM_CONDITIONAL(USE_PKCS1, test x$pkcs1 = xtrue)
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AM_CONDITIONAL(USE_PGP, test x$pgp = xtrue)
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AM_CONDITIONAL(USE_PEM, test x$pem = xtrue)
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AM_CONDITIONAL(USE_HMAC, test x$hmac = xtrue)
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AM_CONDITIONAL(USE_XCBC, test x$xcbc = xtrue)
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@ -1364,6 +1380,7 @@ AC_OUTPUT(
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src/libstrongswan/plugins/x509/Makefile
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src/libstrongswan/plugins/pubkey/Makefile
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src/libstrongswan/plugins/pkcs1/Makefile
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src/libstrongswan/plugins/pgp/Makefile
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src/libstrongswan/plugins/pem/Makefile
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src/libstrongswan/plugins/curl/Makefile
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src/libstrongswan/plugins/ldap/Makefile
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@ -165,6 +165,10 @@ if USE_PKCS1
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SUBDIRS += plugins/pkcs1
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endif
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if USE_PGP
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SUBDIRS += plugins/pgp
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endif
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if USE_PEM
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SUBDIRS += plugins/pem
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endif
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@ -0,0 +1,12 @@
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INCLUDES = -I$(top_srcdir)/src/libstrongswan
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AM_CFLAGS = -rdynamic
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plugin_LTLIBRARIES = libstrongswan-pgp.la
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libstrongswan_pgp_la_SOURCES = pgp_plugin.h pgp_plugin.c \
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pgp_builder.h pgp_builder.c
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libstrongswan_pgp_la_LDFLAGS = -module -avoid-version
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@ -0,0 +1,347 @@
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/*
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* Copyright (C) 2009 Martin Willi
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* Copyright (C) 2002-2009 Andreas Steffen
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "pgp_builder.h"
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#include <debug.h>
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#include <credentials/keys/private_key.h>
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ENUM_BEGIN(pgp_packet_tag_names, PGP_PKT_RESERVED, PGP_PKT_PUBLIC_SUBKEY,
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"Reserved",
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"Public-Key Encrypted Session Key Packet",
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"Signature Packet",
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"Symmetric-Key Encrypted Session Key Packet",
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"One-Pass Signature Packet",
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"Secret Key Packet",
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"Public Key Packet",
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"Secret Subkey Packet",
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"Compressed Data Packet",
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"Symmetrically Encrypted Data Packet",
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"Marker Packet",
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"Literal Data Packet",
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"Trust Packet",
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"User ID Packet",
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"Public Subkey Packet"
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);
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ENUM_NEXT(pgp_packet_tag_names, PGP_PKT_USER_ATTRIBUTE, PGP_PKT_MOD_DETECT_CODE, PGP_PKT_PUBLIC_SUBKEY,
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"User Attribute Packet",
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"Sym. Encrypted and Integrity Protected Data Packet",
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"Modification Detection Code Packet"
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);
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ENUM_END(pgp_packet_tag_names, PGP_PKT_MOD_DETECT_CODE);
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ENUM_BEGIN(pgp_pubkey_alg_names, PGP_PUBKEY_ALG_RSA, PGP_PUBKEY_ALG_RSA_SIGN_ONLY,
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"RSA",
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"RSA_ENC_ONLY",
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"RSA_SIGN_ONLY"
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);
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ENUM_NEXT(pgp_pubkey_alg_names, PGP_PUBKEY_ALG_ELGAMAL_ENC_ONLY, PGP_PUBKEY_ALG_DIFFIE_HELLMAN, PGP_PUBKEY_ALG_RSA_SIGN_ONLY,
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"ELGAMAL_ENC_ONLY",
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"DSA",
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"ECC",
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"ECDSA",
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"ELGAMAL",
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"DIFFIE_HELLMAN"
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);
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ENUM_END(pgp_pubkey_alg_names, PGP_PUBKEY_ALG_DIFFIE_HELLMAN);
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ENUM(pgp_sym_alg_names, PGP_SYM_ALG_PLAIN, PGP_SYM_ALG_TWOFISH,
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"PLAINTEXT",
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"IDEA",
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"3DES",
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"CAST5",
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"BLOWFISH",
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"SAFER",
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"DES",
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"AES_128",
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"AES_192",
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"AES_256",
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"TWOFISH"
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);
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/**
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* Read a PGP scalar of bytes length, advance blob
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*/
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static bool read_scalar(chunk_t *blob, size_t bytes, u_int32_t *scalar)
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{
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u_int32_t res = 0;
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if (bytes > blob->len)
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{
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DBG1("PGP data too short to read %d byte scalar", bytes);
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return FALSE;
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}
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while (bytes-- > 0)
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{
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res = 256 * res + blob->ptr[0];
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*blob = chunk_skip(*blob, 1);
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}
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*scalar = res;
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return TRUE;
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}
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/**
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* Read a PGP MPI, advance blob
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*/
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static bool read_mpi(chunk_t *blob, chunk_t *mpi)
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{
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u_int32_t bits, bytes;
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if (!read_scalar(blob, 2, &bits))
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{
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DBG1("PGP data too short to read MPI length");
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return FALSE;
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}
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bytes = (bits + 7) / 8;
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if (bytes > blob->len)
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{
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DBG1("PGP data too short to %d byte MPI", bytes);
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return FALSE;
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}
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*mpi = chunk_create(blob->ptr, bytes);
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*blob = chunk_skip(*blob, bytes);
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return TRUE;
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}
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/**
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* Load a generic public key from a PGP packet
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*/
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static public_key_t *parse_public_key(chunk_t blob)
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{
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u_int32_t alg;
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public_key_t *key;
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if (!read_scalar(&blob, 1, &alg))
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{
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return NULL;
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}
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switch (alg)
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{
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case PGP_PUBKEY_ALG_RSA:
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case PGP_PUBKEY_ALG_RSA_SIGN_ONLY:
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key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
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BUILD_BLOB_PGP, blob, BUILD_END);
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break;
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default:
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DBG1("PGP public key algorithm %N not supported",
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pgp_pubkey_alg_names, alg);
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return NULL;
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}
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return key;
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}
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/**
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* Load a RSA public key from a PGP packet
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*/
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static public_key_t *parse_rsa_public_key(chunk_t blob)
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{
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chunk_t mpi[2];
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int i;
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for (i = 0; i < 2; i++)
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{
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if (!read_mpi(&blob, &mpi[i]))
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{
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return NULL;
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}
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}
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return lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
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BUILD_RSA_MODULUS, mpi[0], BUILD_RSA_PUB_EXP, mpi[1],
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BUILD_END);
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}
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/**
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* Load a RSA private key from a PGP packet
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*/
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static private_key_t *parse_rsa_private_key(chunk_t blob)
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{
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chunk_t mpi[6];
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u_int32_t s2k;
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int i;
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for (i = 0; i < 2; i++)
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{
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if (!read_mpi(&blob, &mpi[i]))
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{
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return NULL;
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}
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}
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if (!read_scalar(&blob, 1, &s2k))
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{
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return NULL;
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}
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if (s2k == 255 || s2k == 254)
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{
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DBG1("string-to-key specifiers not supported");
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return NULL;
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}
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if (s2k != PGP_SYM_ALG_PLAIN)
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{
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DBG1("%N private key encryption not supported", pgp_sym_alg_names, s2k);
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return NULL;
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}
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for (i = 2; i < 6; i++)
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{
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if (!read_mpi(&blob, &mpi[i]))
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{
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return NULL;
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}
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}
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return lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
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BUILD_RSA_MODULUS, mpi[0], BUILD_RSA_PUB_EXP, mpi[1],
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BUILD_RSA_PRIV_EXP, mpi[2], BUILD_RSA_PRIME1, mpi[3],
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BUILD_RSA_PRIME2, mpi[4], BUILD_RSA_COEFF, mpi[5],
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BUILD_END);
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}
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typedef struct private_builder_t private_builder_t;
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/**
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* Builder implementation for private/public key loading
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*/
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struct private_builder_t {
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/** implements the builder interface */
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builder_t public;
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/** PGP packet data */
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chunk_t blob;
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/** type of key to build */
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key_type_t type;
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};
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/**
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* Implementation of builder_t.build for public keys
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*/
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static public_key_t *build_public(private_builder_t *this)
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{
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public_key_t *key = NULL;
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switch (this->type)
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{
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case KEY_ANY:
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key = parse_public_key(this->blob);
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break;
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case KEY_RSA:
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key = parse_rsa_public_key(this->blob);
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break;
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default:
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break;
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}
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free(this);
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return key;
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}
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/**
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* Implementation of builder_t.add for public keys
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*/
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static void add_public(private_builder_t *this, builder_part_t part, ...)
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{
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va_list args;
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switch (part)
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{
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case BUILD_BLOB_PEM:
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{
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va_start(args, part);
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this->blob = va_arg(args, chunk_t);
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va_end(args);
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break;
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}
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default:
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builder_cancel(&this->public);
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break;
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}
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}
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/**
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* Builder construction function for public keys
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*/
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builder_t *pgp_public_key_builder(key_type_t type)
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{
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private_builder_t *this;
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if (type != KEY_ANY && type != KEY_RSA)
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{
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return NULL;
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}
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this = malloc_thing(private_builder_t);
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this->blob = chunk_empty;
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this->type = type;
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this->public.add = (void(*)(builder_t *this, builder_part_t part, ...))add_public;
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this->public.build = (void*(*)(builder_t *this))build_public;
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return &this->public;
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}
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/**
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* Implementation of builder_t.build for private keys
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*/
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static private_key_t *build_private(private_builder_t *this)
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{
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private_key_t *key;
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key = parse_rsa_private_key(this->blob);
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free(this);
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return key;
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}
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/**
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* Implementation of builder_t.add for private keys
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*/
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static void add_private(private_builder_t *this, builder_part_t part, ...)
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{
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va_list args;
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switch (part)
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{
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case BUILD_BLOB_PGP:
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{
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va_start(args, part);
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this->blob = va_arg(args, chunk_t);
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va_end(args);
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break;
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}
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default:
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builder_cancel(&this->public);
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break;
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}
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}
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/**
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* Builder construction function for private keys
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*/
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builder_t *pgp_private_key_builder(key_type_t type)
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{
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private_builder_t *this;
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if (type != KEY_RSA)
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{
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return NULL;
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}
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this = malloc_thing(private_builder_t);
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this->blob = chunk_empty;
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this->type = type;
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this->public.add = (void(*)(builder_t *this, builder_part_t part, ...))add_private;
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this->public.build = (void*(*)(builder_t *this))build_private;
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return &this->public;
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}
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@ -0,0 +1,119 @@
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/*
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* Copyright (C) 2009 Martin Willi
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* Copyright (C) 2002-2009 Andreas Steffen
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
|
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* Free Software Foundation; either version 2 of the License, or (at your
|
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
|
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* 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.
|
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*/
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/**
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* @defgroup pgp_public_key pgp_public_key
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* @{ @ingroup pgp_p
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*/
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#ifndef PGP_BUILDER_H_
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#define PGP_BUILDER_H_
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#include <enum.h>
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#include <credentials/keys/public_key.h>
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typedef enum pgp_packet_tag_t pgp_packet_tag_t;
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typedef enum pgp_pubkey_alg_t pgp_pubkey_alg_t;
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typedef enum pgp_sym_alg_t pgp_sym_alg_t;
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/**
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* OpenPGP packet tags as defined in section 4.3 of RFC 4880
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*/
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enum pgp_packet_tag_t {
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PGP_PKT_RESERVED = 0,
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PGP_PKT_PUBKEY_ENC_SESSION_KEY = 1,
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PGP_PKT_SIGNATURE = 2,
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PGP_PKT_SYMKEY_ENC_SESSION_KEY = 3,
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PGP_PKT_ONE_PASS_SIGNATURE_PKT = 4,
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PGP_PKT_SECRET_KEY = 5,
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PGP_PKT_PUBLIC_KEY = 6,
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PGP_PKT_SECRET_SUBKEY = 7,
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PGP_PKT_COMPRESSED_DATA = 8,
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PGP_PKT_SYMKEY_ENC_DATA = 9,
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PGP_PKT_MARKER = 10,
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PGP_PKT_LITERAL_DATA = 11,
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PGP_PKT_TRUST = 12,
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PGP_PKT_USER_ID = 13,
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PGP_PKT_PUBLIC_SUBKEY = 14,
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PGP_PKT_USER_ATTRIBUTE = 17,
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PGP_PKT_SYM_ENC_INT_PROT_DATA = 18,
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PGP_PKT_MOD_DETECT_CODE = 19
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};
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/**
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* Enum names for pgp_packet_tag_t
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*/
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extern enum_name_t *pgp_packet_tag_names;
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/**
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* OpenPGP public key algorithms as defined in section 9.1 of RFC 4880
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*/
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enum pgp_pubkey_alg_t {
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PGP_PUBKEY_ALG_RSA = 1,
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PGP_PUBKEY_ALG_RSA_ENC_ONLY = 2,
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PGP_PUBKEY_ALG_RSA_SIGN_ONLY = 3,
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PGP_PUBKEY_ALG_ELGAMAL_ENC_ONLY = 16,
|
||||
PGP_PUBKEY_ALG_DSA = 17,
|
||||
PGP_PUBKEY_ALG_ECC = 18,
|
||||
PGP_PUBKEY_ALG_ECDSA = 19,
|
||||
PGP_PUBKEY_ALG_ELGAMAL = 20,
|
||||
PGP_PUBKEY_ALG_DIFFIE_HELLMAN = 21,
|
||||
};
|
||||
|
||||
/**
|
||||
* Enum names for pgp_pubkey_alg_t
|
||||
*/
|
||||
extern enum_name_t *pgp_pubkey_alg_names;
|
||||
|
||||
/**
|
||||
* OpenPGP symmetric key algorithms as defined in section 9.2 of RFC 4880
|
||||
*/
|
||||
enum pgp_sym_alg_t {
|
||||
PGP_SYM_ALG_PLAIN = 0,
|
||||
PGP_SYM_ALG_IDEA = 1,
|
||||
PGP_SYM_ALG_3DES = 2,
|
||||
PGP_SYM_ALG_CAST5 = 3,
|
||||
PGP_SYM_ALG_BLOWFISH = 4,
|
||||
PGP_SYM_ALG_SAFER = 5,
|
||||
PGP_SYM_ALG_DES = 6,
|
||||
PGP_SYM_ALG_AES_128 = 7,
|
||||
PGP_SYM_ALG_AES_192 = 8,
|
||||
PGP_SYM_ALG_AES_256 = 9,
|
||||
PGP_SYM_ALG_TWOFISH = 10
|
||||
};
|
||||
|
||||
/**
|
||||
* Enum names for pgp_sym_alg_t
|
||||
*/
|
||||
extern enum_name_t *pgp_sym_alg_names;
|
||||
|
||||
/**
|
||||
* Create the builder for a generic or an RSA public key.
|
||||
*
|
||||
* @param type type of the key, either KEY_ANY or KEY_RSA
|
||||
* @return builder instance
|
||||
*/
|
||||
builder_t *pgp_public_key_builder(key_type_t type);
|
||||
|
||||
/**
|
||||
* Create the builder for a RSA private key.
|
||||
*
|
||||
* @param type type of the key, KEY_RSA
|
||||
* @return builder instance
|
||||
*/
|
||||
builder_t *pgp_private_key_builder(key_type_t type);
|
||||
|
||||
#endif /** PGP_BUILDER_H_ @}*/
|
||||
|
|
@ -0,0 +1,64 @@
|
|||
/*
|
||||
* 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 "pgp_plugin.h"
|
||||
|
||||
#include <library.h>
|
||||
#include "pgp_builder.h"
|
||||
|
||||
typedef struct private_pgp_plugin_t private_pgp_plugin_t;
|
||||
|
||||
/**
|
||||
* private data of pgp_plugin
|
||||
*/
|
||||
struct private_pgp_plugin_t {
|
||||
|
||||
/**
|
||||
* public functions
|
||||
*/
|
||||
pgp_plugin_t public;
|
||||
};
|
||||
|
||||
/**
|
||||
* Implementation of pgp_plugin_t.pgptroy
|
||||
*/
|
||||
static void destroy(private_pgp_plugin_t *this)
|
||||
{
|
||||
lib->creds->remove_builder(lib->creds,
|
||||
(builder_constructor_t)pgp_public_key_builder);
|
||||
lib->creds->remove_builder(lib->creds,
|
||||
(builder_constructor_t)pgp_private_key_builder);
|
||||
free(this);
|
||||
}
|
||||
|
||||
/*
|
||||
* see header file
|
||||
*/
|
||||
plugin_t *plugin_create()
|
||||
{
|
||||
private_pgp_plugin_t *this = malloc_thing(private_pgp_plugin_t);
|
||||
|
||||
this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
|
||||
|
||||
lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
|
||||
(builder_constructor_t)pgp_public_key_builder);
|
||||
lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
|
||||
(builder_constructor_t)pgp_public_key_builder);
|
||||
lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
|
||||
(builder_constructor_t)pgp_private_key_builder);
|
||||
|
||||
return &this->public.plugin;
|
||||
}
|
||||
|
||||
|
|
@ -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 pgp_p pgp
|
||||
* @ingroup plugins
|
||||
*
|
||||
* @defgroup pgp_plugin pgp_plugin
|
||||
* @{ @ingroup pgp_p
|
||||
*/
|
||||
|
||||
#ifndef PGP_PLUGIN_H_
|
||||
#define PGP_PLUGIN_H_
|
||||
|
||||
#include <plugins/plugin.h>
|
||||
|
||||
typedef struct pgp_plugin_t pgp_plugin_t;
|
||||
|
||||
/**
|
||||
* Plugin providing PKCS#1 private/public key decoding functions
|
||||
*/
|
||||
struct pgp_plugin_t {
|
||||
|
||||
/**
|
||||
* implements plugin interface
|
||||
*/
|
||||
plugin_t plugin;
|
||||
};
|
||||
|
||||
/**
|
||||
* Create a pgp_plugin instance.
|
||||
*/
|
||||
plugin_t *plugin_create();
|
||||
|
||||
#endif /** PGP_PLUGIN_H_ @}*/
|
||||
Loading…
Reference in New Issue