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-rw-r--r--src/methods/generic_hmac_sha1/CMakeLists.txt4
-rw-r--r--src/methods/generic_hmac_sha1/generic_hmac_sha1.c259
2 files changed, 0 insertions, 263 deletions
diff --git a/src/methods/generic_hmac_sha1/CMakeLists.txt b/src/methods/generic_hmac_sha1/CMakeLists.txt
deleted file mode 100644
index b70bc1d..0000000
--- a/src/methods/generic_hmac_sha1/CMakeLists.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-fastd_method(generic-hmac-sha1
- generic_hmac_sha1.c
-)
-fastd_method_link_libraries(generic-hmac-sha1 method_common)
diff --git a/src/methods/generic_hmac_sha1/generic_hmac_sha1.c b/src/methods/generic_hmac_sha1/generic_hmac_sha1.c
deleted file mode 100644
index 530abe3..0000000
--- a/src/methods/generic_hmac_sha1/generic_hmac_sha1.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- Copyright (c) 2012-2014, 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.
-*/
-
-/**
- \file
-
- generic-gmac method provider
-
- generic-gmac can combine any stream cipher with the GMAC authentication.
-*/
-
-
-#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; /**< The cipher used */
- const fastd_mac_info_t *hmac_sha1_info; /**< HMAC-SHA1 */
-};
-
-/** The method-specific session state */
-struct fastd_method_session_state {
- fastd_method_common_t common; /**< The common method 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 */
-
- const fastd_mac_t *hmac_sha1; /**< The HMAC-SHA1 implementation */
- fastd_mac_state_t *hmac_sha1_state; /**< The HMAC-SHA1 state */
-};
-
-
-/** Instanciates a method using a name of the pattern "<cipher>+hmac-sha1" */
-static bool method_create_by_name(const char *name, fastd_method_t **method) {
- fastd_method_t m;
-
- m.hmac_sha1_info = fastd_mac_info_get_by_name("hmac-sha1");
- if (!m.hmac_sha1_info)
- return false;
-
- size_t len = strlen(name);
- if (len < 10)
- return false;
-
- if (strcmp(name+len-10, "+hmac-sha1"))
- return false;
-
- char cipher_name[len-9];
- memcpy(cipher_name, name, len-10);
- cipher_name[len-10] = 0;
-
- m.cipher_info = fastd_cipher_info_get_by_name(cipher_name);
- if (!m.cipher_info)
- return false;
-
- *method = fastd_new(fastd_method_t);
- **method = m;
-
- 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 + method->hmac_sha1_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 = fastd_new(fastd_method_session_state_t);
-
- fastd_method_common_init(&session->common, initiator);
- session->method = method;
-
- session->cipher = fastd_cipher_get(method->cipher_info);
- session->cipher_state = session->cipher->init(secret);
-
- session->hmac_sha1 = fastd_mac_get(method->hmac_sha1_info);
- session->hmac_sha1_state = session->hmac_sha1->init(secret + method->cipher_info->key_length);
-
- 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);
- session->hmac_sha1->free(session->hmac_sha1_state);
-
- free(session);
- }
-}
-
-
-/** Encrypts and authenticates a packet */
-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 + sizeof(fastd_block128_t), alignto(COMMON_HEADBYTES, 16), sizeof(fastd_block128_t)+tail_len);
-
- if (tail_len)
- memset(in.data+in.len, 0, tail_len);
-
- uint8_t nonce[session->method->cipher_info->iv_length] __attribute__((aligned(8)));
- fastd_method_expand_nonce(nonce, session->common.send_nonce, sizeof(nonce));
-
- fastd_block128_t *outblocks = out->data;
- fastd_block128_t tag;
-
- bool ok = session->cipher->crypt(session->cipher_state, outblocks+1, in.data, in.len, nonce);
-
- if (ok) {
- fastd_method_expand_nonce(out->data, session->common.send_nonce, sizeof(fastd_block128_t));
- ok = session->hmac_sha1->digest(session->hmac_sha1_state, &tag, out->data, out->len);
- }
-
- if (!ok) {
- fastd_buffer_free(*out);
- return false;
- }
-
- outblocks[0] = tag;
-
- fastd_buffer_free(in);
-
- fastd_method_put_common_header(out, session->common.send_nonce, 0);
- fastd_method_increment_nonce(&session->common);
-
- return true;
-}
-
-/** Verifies and 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+sizeof(fastd_block128_t))
- return false;
-
- if (!method_session_is_valid(session))
- return false;
-
- uint8_t in_nonce[COMMON_NONCEBYTES];
- uint8_t flags;
- int64_t age;
- if (!fastd_method_handle_common_header(&session->common, &in, in_nonce, &flags, &age))
- return false;
-
- if (flags)
- return false;
-
- uint8_t nonce[session->method->cipher_info->iv_length] __attribute__((aligned(8)));
- fastd_method_expand_nonce(nonce, in_nonce, sizeof(nonce));
-
- fastd_block128_t *inblocks = in.data;
- fastd_block128_t tag = inblocks[0], tag2;
-
- fastd_method_expand_nonce(in.data, in_nonce, sizeof(fastd_block128_t));
- bool ok = session->hmac_sha1->digest(session->hmac_sha1_state, &tag2, in.data, in.len);
-
- if (ok && memcmp(&tag, &tag2, sizeof(fastd_block128_t)) != 0)
- ok = false;
-
- if (ok) {
- size_t tail_len = alignto(in.len, sizeof(fastd_block128_t))-in.len;
- *out = fastd_buffer_alloc(in.len - sizeof(fastd_block128_t), 0, tail_len);
-
- ok = session->cipher->crypt(session->cipher_state, out->data, inblocks+1, in.len - sizeof(fastd_block128_t), nonce);
-
- if (!ok)
- fastd_buffer_free(*out);
- }
-
- if (!ok) {
- inblocks[0] = tag;
- return false;
- }
-
- fastd_buffer_free(in);
-
- if (!fastd_method_reorder_check(peer, &session->common, in_nonce, age)) {
- fastd_buffer_free(*out);
- *out = fastd_buffer_alloc(0, 0, 0);
- }
-
- return true;
-}
-
-
-/** The generic-hmac-sha1 method provider */
-const fastd_method_provider_t fastd_method_generic_hmac_sha1 = {
- .max_overhead = COMMON_HEADBYTES + sizeof(fastd_block128_t),
- .min_encrypt_head_space = 0,
- .min_decrypt_head_space = 0,
- .min_encrypt_tail_space = sizeof(fastd_block128_t)-1,
- .min_decrypt_tail_space = sizeof(fastd_block128_t)-1,
-
- .create_by_name = method_create_by_name,
- .destroy = method_destroy,
-
- .key_length = method_key_length,
-
- .session_init = method_session_init,
- .session_is_valid = method_session_is_valid,
- .session_is_initiator = method_session_is_initiator,
- .session_want_refresh = method_session_want_refresh,
- .session_superseded = method_session_superseded,
- .session_free = method_session_free,
-
- .encrypt = method_encrypt,
- .decrypt = method_decrypt,
-};
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