diff options
Diffstat (limited to 'src/method.h')
| -rw-r--r-- | src/method.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/method.h b/src/method.h new file mode 100644 index 0000000..b56db14 --- /dev/null +++ b/src/method.h @@ -0,0 +1,77 @@ +/* + 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. +*/ + + +#ifndef _FASTD_METHOD_H_ +#define _FASTD_METHOD_H_ + +#include "fastd.h" + + +struct fastd_method_info { + const char *name; + const fastd_method_t *method; + fastd_method_context_t *ctx; +}; + +struct fastd_method { + size_t max_overhead; + size_t min_encrypt_head_space; + size_t min_decrypt_head_space; + size_t min_encrypt_tail_space; + size_t min_decrypt_tail_space; + + bool (*create_by_name)(const char *name, fastd_method_context_t **method_ctx); + void (*destroy)(fastd_method_context_t *method_ctx); + + size_t (*key_length)(fastd_context_t *ctx, const fastd_method_context_t *method_ctx); + + fastd_method_session_state_t* (*session_init)(fastd_context_t *ctx, const fastd_method_context_t *method_ctx, const uint8_t *secret, bool initiator); + fastd_method_session_state_t* (*session_init_compat)(fastd_context_t *ctx, const fastd_method_context_t *method_ctx, const uint8_t *secret, size_t length, bool initiator); + bool (*session_is_valid)(fastd_context_t *ctx, fastd_method_session_state_t *session); + bool (*session_is_initiator)(fastd_context_t *ctx, fastd_method_session_state_t *session); + bool (*session_want_refresh)(fastd_context_t *ctx, fastd_method_session_state_t *session); + void (*session_superseded)(fastd_context_t *ctx, fastd_method_session_state_t *session); + void (*session_free)(fastd_context_t *ctx, fastd_method_session_state_t *session); + + bool (*encrypt)(fastd_context_t *ctx, fastd_peer_t *peer, fastd_method_session_state_t *session, fastd_buffer_t *out, fastd_buffer_t in); + bool (*decrypt)(fastd_context_t *ctx, fastd_peer_t *peer, fastd_method_session_state_t *session, fastd_buffer_t *out, fastd_buffer_t in); +}; + + +bool fastd_method_create_by_name(const char *name, const fastd_method_t **method, fastd_method_context_t **method_ctx); + + +static inline const fastd_method_info_t* fastd_method_get_by_name(fastd_context_t *ctx, const char *name) { + size_t i; + for (i = 0; ctx->conf->methods[i].name; i++) { + if (!strcmp(ctx->conf->methods[i].name, name)) + return &ctx->conf->methods[i]; + } + + return NULL; +} + +#endif /* _FASTD_METHOD_H_ */ |