From 20ee3b5a4f110f53a73746e18fc0eb0cbbb7845c Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Sat, 2 Nov 2013 04:32:18 +0100 Subject: Implement the first step towards a more flexible way to support crypto methods --- src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt | 6 ++ .../aes128_ctr/nacl/cipher_aes128_ctr_nacl.c | 76 ++++++++++++++++++++++ 2 files changed, 82 insertions(+) create mode 100644 src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt create mode 100644 src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c (limited to 'src/crypto/cipher/aes128_ctr/nacl') diff --git a/src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt b/src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt new file mode 100644 index 0000000..50e4b4c --- /dev/null +++ b/src/crypto/cipher/aes128_ctr/nacl/CMakeLists.txt @@ -0,0 +1,6 @@ +include_directories(${FASTD_SOURCE_DIR}/src ${FASTD_BINARY_DIR} ${NACL_INCLUDE_DIRS}) + +add_library(cipher_aes128_ctr_nacl OBJECT + cipher_aes128_ctr_nacl.c +) +set_property(TARGET method_xsalsa20_poly1305 PROPERTY COMPILE_FLAGS "${FASTD_CFLAGS}") diff --git a/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c b/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c new file mode 100644 index 0000000..f63e46f --- /dev/null +++ b/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c @@ -0,0 +1,76 @@ +/* + 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 fastd_cipher_state { + fastd_buffer_t d; +}; + + +static fastd_cipher_context_t* aes128_ctr_initialize(fastd_context_t *ctx UNUSED) { + return NULL; +} + +static fastd_cipher_state_t* aes128_ctr_init_state(fastd_context_t *ctx, const fastd_cipher_context_t *cctx UNUSED, const uint8_t *key) { + fastd_block128_t k; + memcpy(k.b, key, sizeof(fastd_block128_t)); + + fastd_cipher_state_t *state = malloc(sizeof(fastd_cipher_state_t)); + + state->d = fastd_buffer_alloc(ctx, crypto_stream_aes128ctr_BEFORENMBYTES, 0, 0); + crypto_stream_aes128ctr_beforenm(state->d.data, k.b); + + return state; +} + +static bool aes128_ctr_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 fastd_block128_t *iv) { + crypto_stream_aes128ctr_xor_afternm(out->b, in->b, len, iv->b, state->d.data); + return true; +} + +static void aes128_ctr_free_state(fastd_context_t *ctx UNUSED, fastd_cipher_state_t *state) { + if (state) { + fastd_buffer_free(state->d); + free(state); + } +} + +static void aes128_ctr_free(fastd_context_t *ctx UNUSED, fastd_cipher_context_t *cctx UNUSED) { +} + +const fastd_cipher_t fastd_cipher_aes128_ctr_nacl = { + .name = "nacl", + + .initialize = aes128_ctr_initialize, + .init_state = aes128_ctr_init_state, + .crypt = aes128_ctr_crypt, + + .free_state = aes128_ctr_free_state, + .free = aes128_ctr_free, +}; -- cgit v1.2.3