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-rw-r--r--src/methods/cipher_test/cipher_test.c35
1 files changed, 30 insertions, 5 deletions
diff --git a/src/methods/cipher_test/cipher_test.c b/src/methods/cipher_test/cipher_test.c
index 52bca0f..7e064ba 100644
--- a/src/methods/cipher_test/cipher_test.c
+++ b/src/methods/cipher_test/cipher_test.c
@@ -23,25 +23,37 @@
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+/**
+ \file
+
+ cipher-test method provider (testing and benchmarking only)
+
+ The cipher-test method provider performs encryption only and can be used to test
+ and benchmark cipher implementations.
+*/
+
#include "../../crypto.h"
#include "../../method.h"
#include "../common.h"
+/** A specific method provided by this provider */
struct fastd_method {
- const fastd_cipher_info_t *cipher_info;
+ const fastd_cipher_info_t *cipher_info; /**< The cipher used */
};
+/** The method-specific session state */
struct fastd_method_session_state {
- fastd_method_common_t common;
+ fastd_method_common_t common; /**< The common method state */
- const fastd_method_t *method;
- const fastd_cipher_t *cipher;
- fastd_cipher_state_t *cipher_state;
+ const fastd_method_t *method; /**< The specific method used */
+ const fastd_cipher_t *cipher; /**< The cipher implementation used */
+ fastd_cipher_state_t *cipher_state; /**< The cipher state */
};
+/** Instanciates a method using a name of the pattern "<cipher>+cipher-test" */
static bool method_create_by_name(const char *name, fastd_method_t **method) {
fastd_method_t m;
@@ -66,14 +78,17 @@ static bool method_create_by_name(const char *name, fastd_method_t **method) {
return true;
}
+/** Frees a method */
static void method_destroy(fastd_method_t *method) {
free(method);
}
+/** Returns the key length used by a method */
static size_t method_key_length(const fastd_method_t *method) {
return method->cipher_info->key_length;
}
+/** Initializes a session */
static fastd_method_session_state_t* method_session_init(const fastd_method_t *method, const uint8_t *secret, bool initiator) {
fastd_method_session_state_t *session = malloc(sizeof(fastd_method_session_state_t));
@@ -87,22 +102,27 @@ static fastd_method_session_state_t* method_session_init(const fastd_method_t *m
return session;
}
+/** Checks if the session is currently valid */
static bool method_session_is_valid(fastd_method_session_state_t *session) {
return (session && fastd_method_session_common_is_valid(&session->common));
}
+/** Checks if this side is the initator of the session */
static bool method_session_is_initiator(fastd_method_session_state_t *session) {
return fastd_method_session_common_is_initiator(&session->common);
}
+/** Checks if the session should be refreshed */
static bool method_session_want_refresh(fastd_method_session_state_t *session) {
return fastd_method_session_common_want_refresh(&session->common);
}
+/** Marks the session as superseded */
static void method_session_superseded(fastd_method_session_state_t *session) {
fastd_method_session_common_superseded(&session->common);
}
+/** Frees the session state */
static void method_session_free(fastd_method_session_state_t *session) {
if (session) {
session->cipher->free(session->cipher_state);
@@ -110,6 +130,8 @@ static void method_session_free(fastd_method_session_state_t *session) {
}
}
+
+/** Encrypts a packet and adds the common method header */
static bool method_encrypt(fastd_peer_t *peer UNUSED, fastd_method_session_state_t *session, fastd_buffer_t *out, fastd_buffer_t in) {
size_t tail_len = alignto(in.len, sizeof(fastd_block128_t))-in.len;
*out = fastd_buffer_alloc(in.len, alignto(COMMON_HEADBYTES, 16), sizeof(fastd_block128_t)+tail_len);
@@ -140,6 +162,7 @@ static bool method_encrypt(fastd_peer_t *peer UNUSED, fastd_method_session_state
return true;
}
+/** Decrypts a packet */
static bool method_decrypt(fastd_peer_t *peer, fastd_method_session_state_t *session, fastd_buffer_t *out, fastd_buffer_t in) {
if (in.len < COMMON_HEADBYTES)
return false;
@@ -184,6 +207,8 @@ static bool method_decrypt(fastd_peer_t *peer, fastd_method_session_state_t *ses
return true;
}
+
+/** The cipher-test method provider */
const fastd_method_provider_t fastd_method_cipher_test = {
.max_overhead = COMMON_HEADBYTES,
.min_encrypt_head_space = 0,