From 08892cdc5408e51f8e6a9ac316f7831a538ef123 Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Thu, 21 Nov 2013 18:39:12 +0100 Subject: Add salsa20 cipher --- src/crypto/cipher/CMakeLists.txt | 1 + src/crypto/cipher/salsa20/CMakeLists.txt | 2 + src/crypto/cipher/salsa20/nacl/CMakeLists.txt | 6 +++ src/crypto/cipher/salsa20/nacl/salsa20_nacl.c | 74 +++++++++++++++++++++++++++ 4 files changed, 83 insertions(+) create mode 100644 src/crypto/cipher/salsa20/CMakeLists.txt create mode 100644 src/crypto/cipher/salsa20/nacl/CMakeLists.txt create mode 100644 src/crypto/cipher/salsa20/nacl/salsa20_nacl.c diff --git a/src/crypto/cipher/CMakeLists.txt b/src/crypto/cipher/CMakeLists.txt index 98140f4..a68fece 100644 --- a/src/crypto/cipher/CMakeLists.txt +++ b/src/crypto/cipher/CMakeLists.txt @@ -39,6 +39,7 @@ endmacro(fastd_cipher_impl_require) add_subdirectory(aes128_ctr) add_subdirectory(blowfish_ctr) add_subdirectory(null) +add_subdirectory(salsa20) set(CIPHER_DEFINITIONS "") diff --git a/src/crypto/cipher/salsa20/CMakeLists.txt b/src/crypto/cipher/salsa20/CMakeLists.txt new file mode 100644 index 0000000..3d325dc --- /dev/null +++ b/src/crypto/cipher/salsa20/CMakeLists.txt @@ -0,0 +1,2 @@ +fastd_cipher(salsa20) +add_subdirectory(nacl) diff --git a/src/crypto/cipher/salsa20/nacl/CMakeLists.txt b/src/crypto/cipher/salsa20/nacl/CMakeLists.txt new file mode 100644 index 0000000..d76ff34 --- /dev/null +++ b/src/crypto/cipher/salsa20/nacl/CMakeLists.txt @@ -0,0 +1,6 @@ +fastd_cipher_impl(salsa20 nacl + salsa20_nacl.c +) +fastd_cipher_impl_include_directories(salsa20 nacl ${NACL_INCLUDE_DIRS}) +fastd_cipher_impl_link_libraries(salsa20 nacl ${NACL_LIBRARIES}) +fastd_cipher_impl_require(salsa20 nacl NACL) diff --git a/src/crypto/cipher/salsa20/nacl/salsa20_nacl.c b/src/crypto/cipher/salsa20/nacl/salsa20_nacl.c new file mode 100644 index 0000000..cb78afc --- /dev/null +++ b/src/crypto/cipher/salsa20/nacl/salsa20_nacl.c @@ -0,0 +1,74 @@ +/* + Copyright (c) 2012-2013, Matthias Schiffer + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + +#include "../../../../fastd.h" +#include + + +struct __attribute__((aligned(16))) fastd_cipher_state { + uint8_t key[crypto_stream_salsa20_KEYBYTES]; +}; + + +static fastd_cipher_context_t* salsa20_initialize(fastd_context_t *ctx UNUSED) { + return NULL; +} + +static fastd_cipher_state_t* salsa20_init_state(fastd_context_t *ctx UNUSED, const fastd_cipher_context_t *cctx UNUSED, const uint8_t *key) { + fastd_cipher_state_t *state = malloc(sizeof(fastd_cipher_state_t)); + memcpy(state->key, key, crypto_stream_salsa20_KEYBYTES); + + return state; +} + +static bool salsa20_crypt(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t len, const uint8_t *iv) { + crypto_stream_salsa20_xor(out->b, in->b, len, iv, state->key); + return true; +} + +static void salsa20_free_state(fastd_context_t *ctx UNUSED, fastd_cipher_state_t *state) { + if (state) { + secure_memzero(state, sizeof(*state)); + free(state); + } +} + +static void salsa20_free(fastd_context_t *ctx UNUSED, fastd_cipher_context_t *cctx UNUSED) { +} + +const fastd_cipher_t fastd_cipher_salsa20_nacl = { + .name = "nacl", + .key_length = crypto_stream_salsa20_KEYBYTES, + .iv_length = crypto_stream_salsa20_NONCEBYTES, + + .initialize = salsa20_initialize, + .init_state = salsa20_init_state, + + .crypt = salsa20_crypt, + + .free_state = salsa20_free_state, + .free = salsa20_free, +}; -- cgit v1.2.3