added a wrapper plugin for OpenSSL crypters (AES, 3DES, Blowfish etc.)
This commit is contained in:
parent
1da06b295f
commit
17353034f3
17
configure.in
17
configure.in
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@ -496,6 +496,16 @@ AC_ARG_ENABLE(
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fi],
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fi],
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)
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)
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AC_ARG_ENABLE(
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[openssl],
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AS_HELP_STRING([--enable-openssl],[enables the OpenSSL crypto plugin. (default is NO).]),
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[if test x$enableval = xyes; then
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openssl=true
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else
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openssl=false
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fi],
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)
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dnl =========================
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dnl =========================
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dnl check required programs
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dnl check required programs
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dnl =========================
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dnl =========================
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@ -597,6 +607,11 @@ if test x$mysql = xtrue; then
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AC_CHECK_HEADER([sqlite3.h],,[AC_MSG_ERROR([SQLite header sqlite3.h not found!])])
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AC_CHECK_HEADER([sqlite3.h],,[AC_MSG_ERROR([SQLite header sqlite3.h not found!])])
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fi
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fi
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if test x$openssl = xtrue; then
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AC_HAVE_LIBRARY([ssl],[LIBS="$LIBS"],[AC_MSG_ERROR([OpenSSL library ssl not found])])
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AC_CHECK_HEADER([openssl/evp.h],,[AC_MSG_ERROR([OpenSSL header openssl/evp.h not found!])])
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fi
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dnl =========================
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dnl =========================
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dnl set Makefile.am vars
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dnl set Makefile.am vars
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dnl =========================
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dnl =========================
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@ -643,6 +658,7 @@ AM_CONDITIONAL(USE_PLUTO_OR_CHARON, test x$pluto = xtrue -o x$charon = xtrue)
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AM_CONDITIONAL(USE_LIBSTRONGSWAN, test x$charon = xtrue -o x$tools = xtrue)
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AM_CONDITIONAL(USE_LIBSTRONGSWAN, test x$charon = xtrue -o x$tools = xtrue)
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AM_CONDITIONAL(USE_FILE_CONFIG, test x$pluto = xtrue -o x$stroke = xtrue)
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AM_CONDITIONAL(USE_FILE_CONFIG, test x$pluto = xtrue -o x$stroke = xtrue)
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AM_CONDITIONAL(USE_PADLOCK, test x$padlock = xtrue)
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AM_CONDITIONAL(USE_PADLOCK, test x$padlock = xtrue)
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AM_CONDITIONAL(USE_OPENSSL, test x$openssl = xtrue)
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dnl ==============================
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dnl ==============================
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dnl set global definitions
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dnl set global definitions
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@ -676,6 +692,7 @@ AC_OUTPUT(
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src/libstrongswan/plugins/mysql/Makefile
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src/libstrongswan/plugins/mysql/Makefile
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src/libstrongswan/plugins/sqlite/Makefile
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src/libstrongswan/plugins/sqlite/Makefile
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src/libstrongswan/plugins/padlock/Makefile
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src/libstrongswan/plugins/padlock/Makefile
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src/libstrongswan/plugins/openssl/Makefile
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src/libcrypto/Makefile
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src/libcrypto/Makefile
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src/libfreeswan/Makefile
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src/libfreeswan/Makefile
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src/pluto/Makefile
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src/pluto/Makefile
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@ -144,6 +144,10 @@ if USE_PADLOCK
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SUBDIRS += plugins/padlock
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SUBDIRS += plugins/padlock
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endif
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endif
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if USE_OPENSSL
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SUBDIRS += plugins/openssl
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endif
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if USE_INTEGRITY_TEST
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if USE_INTEGRITY_TEST
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# build fips_signer which in turn builds fips_signature.h
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# build fips_signer which in turn builds fips_signature.h
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#########################################################
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#########################################################
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@ -0,0 +1,13 @@
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INCLUDES = -I$(top_srcdir)/src/libstrongswan
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AM_CFLAGS = -rdynamic
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plugin_LTLIBRARIES = libstrongswan-openssl.la
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libstrongswan_openssl_la_SOURCES = openssl_plugin.h openssl_plugin.c \
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openssl_crypter.c openssl_crypter.h
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libstrongswan_openssl_la_LDFLAGS = -module
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libstrongswan_openssl_la_LIBADD = -lssl
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@ -0,0 +1,250 @@
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/*
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* Copyright (C) 2008 Tobias Brunner
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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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* $Id$
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*/
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#include "openssl_crypter.h"
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#include <openssl/evp.h>
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typedef struct private_openssl_crypter_t private_openssl_crypter_t;
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/**
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* Private data of openssl_crypter_t
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*/
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struct private_openssl_crypter_t {
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/**
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* Public part of this class.
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*/
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openssl_crypter_t public;
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/*
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* the key
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*/
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chunk_t key;
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/*
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* the cipher to use
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*/
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const EVP_CIPHER *cipher;
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};
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/**
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* Mapping from the algorithms defined in IKEv2 to
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* OpenSSL algorithm names and their key length
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*/
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typedef struct {
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/**
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* Identifier specified in IKEv2
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*/
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u_int16_t ikev2_id;
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/**
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* Name of the algorithm, as used in OpenSSL
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*/
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char *name;
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/**
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* Minimum valid key length in bytes
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*/
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size_t key_size_min;
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/**
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* Maximum valid key length in bytes
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*/
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size_t key_size_max;
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} openssl_algorithm_t;
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#define END_OF_LIST -1
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/**
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* Algorithms for encryption
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*/
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static openssl_algorithm_t encryption_algs[] = {
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/* {ENCR_DES_IV64, "***", 0, 0}, */
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{ENCR_DES, "des", 8, 8}, /* 64 bits */
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{ENCR_3DES, "des3", 24, 24}, /* 192 bits */
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{ENCR_RC5, "rc5", 5, 255}, /* 40 to 2040 bits, RFC 2451 */
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{ENCR_IDEA, "idea", 16, 16}, /* 128 bits, RFC 2451 */
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{ENCR_CAST, "cast", 5, 16}, /* 40 to 128 bits, RFC 2451 */
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{ENCR_BLOWFISH, "blowfish", 5, 56}, /* 40 to 448 bits, RFC 2451 */
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/* {ENCR_3IDEA, "***", 0, 0}, */
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/* {ENCR_DES_IV32, "***", 0, 0}, */
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/* {ENCR_NULL, "***", 0, 0}, */ /* handled separately */
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/* {ENCR_AES_CBC, "***", 0, 0}, */ /* handled separately */
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/* {ENCR_AES_CTR, "***", 0, 0}, */ /* disabled in evp.h */
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{END_OF_LIST, NULL, 0, 0},
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};
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/**
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* Look up an OpenSSL algorithm name and its key size
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*/
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static char* lookup_algorithm(openssl_algorithm_t *openssl_algo,
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u_int16_t ikev2_algo, size_t key_size)
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{
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while (openssl_algo->ikev2_id != END_OF_LIST)
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{
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if (ikev2_algo == openssl_algo->ikev2_id)
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{
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/* validate key size */
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if (key_size < openssl_algo->key_size_min ||
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key_size > openssl_algo->key_size_max)
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{
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return NULL;
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}
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return openssl_algo->name;
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}
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openssl_algo++;
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}
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return NULL;
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}
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static void crypt(private_openssl_crypter_t *this, chunk_t data,
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chunk_t iv, chunk_t *dst, int enc)
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{
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int len, finlen;
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unsigned char buf[data.len + this->cipher->block_size];
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EVP_CIPHER_CTX ctx;
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EVP_CIPHER_CTX_init(&ctx);
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EVP_CipherInit_ex(&ctx, this->cipher, NULL, this->key.ptr, iv.ptr, enc);
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EVP_CIPHER_CTX_set_padding(&ctx, 0); /* disable padding */
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EVP_CipherUpdate(&ctx, buf, &len, data.ptr, data.len);
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EVP_CipherFinal_ex(&ctx, buf + len, &finlen);
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len += finlen;
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*dst = chunk_alloc(len);
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memcpy(dst->ptr, buf, len);
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EVP_CIPHER_CTX_cleanup(&ctx);
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/* TODO: because we don't use padding, we can simplify this a bit because
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* EVP_CryptFinal_ex does not do anything but checking if any data is left.
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* so we can work without buffer and fill the dst directly */
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}
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/**
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* Implementation of crypter_t.decrypt.
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*/
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static void decrypt(private_openssl_crypter_t *this, chunk_t data,
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chunk_t iv, chunk_t *dst)
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{
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crypt(this, data, iv, dst, 0);
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}
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/**
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* Implementation of crypter_t.encrypt.
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*/
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static void encrypt (private_openssl_crypter_t *this, chunk_t data,
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chunk_t iv, chunk_t *dst)
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{
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crypt(this, data, iv, dst, 1);
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}
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/**
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* Implementation of crypter_t.get_block_size.
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*/
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static size_t get_block_size(private_openssl_crypter_t *this)
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{
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return this->cipher->block_size;
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}
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/**
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* Implementation of crypter_t.get_key_size.
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*/
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static size_t get_key_size(private_openssl_crypter_t *this)
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{
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return this->key.len;
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}
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/**
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* Implementation of crypter_t.set_key.
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*/
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static void set_key(private_openssl_crypter_t *this, chunk_t key)
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{
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memcpy(this->key.ptr, key.ptr, min(key.len, this->key.len));
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}
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/**
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* Implementation of crypter_t.destroy and aes_crypter_t.destroy.
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*/
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static void destroy (private_openssl_crypter_t *this)
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{
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free(this->key.ptr);
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free(this);
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}
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/*
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* Described in header
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*/
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openssl_crypter_t *openssl_crypter_create(encryption_algorithm_t algo,
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size_t key_size)
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{
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private_openssl_crypter_t *this;
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this = malloc_thing(private_openssl_crypter_t);
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switch (algo)
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{
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case ENCR_NULL:
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this->cipher = EVP_enc_null();
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break;
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case ENCR_AES_CBC:
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switch (key_size)
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{
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case 16: /* AES 128 */
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this->cipher = EVP_get_cipherbyname("aes128");
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break;
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case 24: /* AES-192 */
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this->cipher = EVP_get_cipherbyname("aes192");
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break;
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case 32: /* AES-256 */
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this->cipher = EVP_get_cipherbyname("aes256");
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break;
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default:
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free(this);
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return NULL;
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}
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break;
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default:
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{
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char* name = lookup_algorithm(encryption_algs, algo, key_size);
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if (!name)
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{
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/* algo unavailable or key_size invalid */
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free(this);
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return NULL;
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}
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this->cipher = EVP_get_cipherbyname(name);
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break;
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}
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}
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if (!this->cipher)
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{
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/* OpenSSL does not support the requested algo */
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free(this);
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return NULL;
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}
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this->key = chunk_alloc(key_size);
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this->public.crypter_interface.encrypt = (void (*) (crypter_t *, chunk_t,chunk_t, chunk_t *)) encrypt;
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this->public.crypter_interface.decrypt = (void (*) (crypter_t *, chunk_t , chunk_t, chunk_t *)) decrypt;
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this->public.crypter_interface.get_block_size = (size_t (*) (crypter_t *)) get_block_size;
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this->public.crypter_interface.get_key_size = (size_t (*) (crypter_t *)) get_key_size;
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this->public.crypter_interface.set_key = (void (*) (crypter_t *,chunk_t)) set_key;
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this->public.crypter_interface.destroy = (void (*) (crypter_t *)) destroy;
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return &this->public;
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}
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@ -0,0 +1,49 @@
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/*
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* Copyright (C) 2008 Tobias Brunner
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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
|
||||||
|
* Free Software Foundation; either version 2 of the License, or (at your
|
||||||
|
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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||||||
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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 openssl_crypter openssl_crypter
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* @{ @ingroup openssl_p
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*/
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#ifndef OPENSSL_CRYPTER_H_
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#define OPENSSL_CRYPTER_H_
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typedef struct openssl_crypter_t openssl_crypter_t;
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#include <crypto/crypters/crypter.h>
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/**
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* Implementation of AES using OpenSSL.
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*/
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struct openssl_crypter_t {
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/**
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* The crypter_t interface.
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*/
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crypter_t crypter_interface;
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};
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/**
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* Constructor to create openssl_crypter_t.
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*
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* @param algo algorithm to implement, must be ENCR_AES_CBC
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* @param key_size key size in bytes
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* @return openssl_crypter_t, NULL if not supported
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|
*/
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openssl_crypter_t *openssl_crypter_create(encryption_algorithm_t algo,
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size_t key_size);
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#endif /* OPENSSL_CRYPTER_H_ @}*/
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@ -0,0 +1,80 @@
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/*
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* Copyright (C) 2008 Tobias Brunner
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||||||
|
* 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 <openssl/evp.h>
|
||||||
|
|
||||||
|
#include "openssl_plugin.h"
|
||||||
|
|
||||||
|
#include <library.h>
|
||||||
|
#include "openssl_crypter.h"
|
||||||
|
|
||||||
|
typedef struct private_openssl_plugin_t private_openssl_plugin_t;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* private data of openssl_plugin
|
||||||
|
*/
|
||||||
|
struct private_openssl_plugin_t {
|
||||||
|
|
||||||
|
/**
|
||||||
|
* public functions
|
||||||
|
*/
|
||||||
|
openssl_plugin_t public;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Implementation of openssl_plugin_t.destroy
|
||||||
|
*/
|
||||||
|
static void destroy(private_openssl_plugin_t *this)
|
||||||
|
{
|
||||||
|
lib->crypto->remove_crypter(lib->crypto,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
|
||||||
|
EVP_cleanup();
|
||||||
|
|
||||||
|
free(this);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* see header file
|
||||||
|
*/
|
||||||
|
plugin_t *plugin_create()
|
||||||
|
{
|
||||||
|
private_openssl_plugin_t *this = malloc_thing(private_openssl_plugin_t);
|
||||||
|
|
||||||
|
this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
|
||||||
|
|
||||||
|
OpenSSL_add_all_algorithms();
|
||||||
|
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_DES,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_3DES,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_RC5,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_IDEA,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_CAST,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_BLOWFISH,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_NULL,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
lib->crypto->add_crypter(lib->crypto, ENCR_AES_CBC,
|
||||||
|
(crypter_constructor_t)openssl_crypter_create);
|
||||||
|
|
||||||
|
return &this->public.plugin;
|
||||||
|
}
|
|
@ -0,0 +1,47 @@
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2008 Tobias Brunner
|
||||||
|
* 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 openssl_p openssl
|
||||||
|
* @ingroup plugins
|
||||||
|
*
|
||||||
|
* @defgroup openssl_plugin openssl_plugin
|
||||||
|
* @{ @ingroup openssl_p
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef OPENSSL_PLUGIN_H_
|
||||||
|
#define OPENSSL_PLUGIN_H_
|
||||||
|
|
||||||
|
#include <plugins/plugin.h>
|
||||||
|
|
||||||
|
typedef struct openssl_plugin_t openssl_plugin_t;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Plugin implementing crypto functions via the OpenSSL library
|
||||||
|
*/
|
||||||
|
struct openssl_plugin_t {
|
||||||
|
|
||||||
|
/**
|
||||||
|
* implements plugin interface
|
||||||
|
*/
|
||||||
|
plugin_t plugin;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Create a openssl_plugin instance.
|
||||||
|
*/
|
||||||
|
plugin_t *plugin_create();
|
||||||
|
|
||||||
|
#endif /* OPENSSL_PLUGIN_H_ @}*/
|
Loading…
Reference in New Issue