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authorMatthias Schiffer <mschiffer@universe-factory.net>2014-05-29 05:00:11 +0200
committerMatthias Schiffer <mschiffer@universe-factory.net>2014-05-29 05:00:11 +0200
commit2fe678653b7dd9f61dbbcd5e7d862360882bd7e8 (patch)
tree38c9dabad94845e848373b15788fcd7ae089218e /src/crypto/cipher/aes128_ctr/nacl
parentefcafca969d2e789cdf106609b04a86ef9b53a3d (diff)
downloadfastd-2fe678653b7dd9f61dbbcd5e7d862360882bd7e8.tar
fastd-2fe678653b7dd9f61dbbcd5e7d862360882bd7e8.zip
Document *everything*
Diffstat (limited to 'src/crypto/cipher/aes128_ctr/nacl')
-rw-r--r--src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c14
1 files changed, 13 insertions, 1 deletions
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
index 793b724..797572c 100644
--- a/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c
+++ b/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c
@@ -23,17 +23,25 @@
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+/**
+ \file
+
+ The aes128-ctr implementation from NaCl
+*/
+
#include "../../../../crypto.h"
#include <crypto_stream_aes128ctr.h>
+/** The cipher state */
struct __attribute__((aligned(16))) fastd_cipher_state {
- uint8_t d[crypto_stream_aes128ctr_BEFORENMBYTES] __attribute__((aligned(16)));
+ uint8_t d[crypto_stream_aes128ctr_BEFORENMBYTES] __attribute__((aligned(16))); /**< The unpacked AES key */
};
+/** Initializes the cipher state */
static fastd_cipher_state_t* aes128_ctr_init(const uint8_t *key) {
fastd_block128_t k;
memcpy(k.b, key, sizeof(fastd_block128_t));
@@ -47,11 +55,13 @@ static fastd_cipher_state_t* aes128_ctr_init(const uint8_t *key) {
return state;
}
+/** XORs data with the aes128-ctr cipher stream */
static bool aes128_ctr_crypt(const fastd_cipher_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t len, const uint8_t *iv) {
crypto_stream_aes128ctr_xor_afternm(out->b, in->b, len, iv, state->d);
return true;
}
+/** Frees the cipher state */
static void aes128_ctr_free(fastd_cipher_state_t *state) {
if (state) {
secure_memzero(state, sizeof(*state));
@@ -59,6 +69,8 @@ static void aes128_ctr_free(fastd_cipher_state_t *state) {
}
}
+
+/** The nacl aes128-ctr implementation */
const fastd_cipher_t fastd_cipher_aes128_ctr_nacl = {
.init = aes128_ctr_init,
.crypt = aes128_ctr_crypt,