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authorMatthias Schiffer <mschiffer@universe-factory.net>2013-11-15 21:52:45 +0100
committerMatthias Schiffer <mschiffer@universe-factory.net>2013-11-15 21:52:45 +0100
commit3d00ddf2968711d071b537b27c3ec208b584cbdc (patch)
tree4f62485d3d51764694b802864e695434b73c62c2 /src/crypto/cipher/blowfish_ctr/openssl/blowfish_ctr.c
parentefdd366144118b5f1a7bcef983a1888975aeefa0 (diff)
downloadfastd-3d00ddf2968711d071b537b27c3ec208b584cbdc.tar
fastd-3d00ddf2968711d071b537b27c3ec208b584cbdc.zip
Allow using blowfish from OpenSSL on systems where it's available anyways
Diffstat (limited to 'src/crypto/cipher/blowfish_ctr/openssl/blowfish_ctr.c')
-rw-r--r--src/crypto/cipher/blowfish_ctr/openssl/blowfish_ctr.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/crypto/cipher/blowfish_ctr/openssl/blowfish_ctr.c b/src/crypto/cipher/blowfish_ctr/openssl/blowfish_ctr.c
new file mode 100644
index 0000000..1eafb97
--- /dev/null
+++ b/src/crypto/cipher/blowfish_ctr/openssl/blowfish_ctr.c
@@ -0,0 +1,113 @@
+/*
+ Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
+ 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 <openssl/blowfish.h>
+
+
+struct fastd_cipher_state {
+ BF_KEY key;
+};
+
+
+static fastd_cipher_context_t* blowfish_ctr_initialize(fastd_context_t *ctx UNUSED) {
+ return NULL;
+}
+
+static size_t blowfish_ctr_key_length(fastd_context_t *ctx UNUSED, const fastd_cipher_context_t *cctx UNUSED) {
+ return 56;
+}
+
+static inline void bf_ntohl(uint32_t *v, size_t len) {
+ size_t i;
+ for (i = 0; i < len; i++)
+ v[i] = ntohl(v[i]);
+}
+
+static inline void bf_htonl(uint32_t *v, size_t len) {
+ size_t i;
+ for (i = 0; i < len; i++)
+ v[i] = htonl(v[i]);
+}
+static fastd_cipher_state_t* blowfish_ctr_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));
+ BF_set_key(&state->key, 56, (const unsigned char*)key);
+
+ return state;
+}
+
+static size_t blowfish_ctr_iv_length(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state UNUSED) {
+ return 8;
+}
+
+static bool blowfish_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 uint8_t *iv) {
+ uint32_t ctr[2];
+
+ fastd_block128_t block;
+ uint32_t* block4 = (uint32_t*)&block;
+
+ memcpy(ctr, iv, sizeof(ctr));
+ bf_ntohl(ctr, 2);
+
+ size_t i;
+ for(i = 0; i < len; i += 16) {
+ memcpy(block4, ctr, sizeof(ctr));
+ BF_encrypt((BF_LONG*)block4, &state->key);
+ ctr[1]++;
+
+ memcpy(block4+2, ctr, sizeof(ctr));
+ BF_encrypt((BF_LONG*)block4+2, &state->key);
+ ctr[1]++;
+
+ bf_htonl(block4, 4);
+ xor(out++, in++, &block);
+ }
+
+ return true;
+}
+
+static void blowfish_ctr_free_state(fastd_context_t *ctx UNUSED, fastd_cipher_state_t *state) {
+ free(state);
+}
+
+static void blowfish_ctr_free(fastd_context_t *ctx UNUSED, fastd_cipher_context_t *cctx UNUSED) {
+}
+
+const fastd_cipher_t fastd_cipher_blowfish_ctr_openssl = {
+ .name = "openssl",
+
+ .initialize = blowfish_ctr_initialize,
+
+ .key_length = blowfish_ctr_key_length,
+ .init_state = blowfish_ctr_init_state,
+
+ .iv_length = blowfish_ctr_iv_length,
+ .crypt = blowfish_ctr_crypt,
+
+ .free_state = blowfish_ctr_free_state,
+ .free = blowfish_ctr_free,
+};