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Diffstat (limited to '')
| -rw-r--r-- | netwerk/srtp/src/crypto/include/auth.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/netwerk/srtp/src/crypto/include/auth.h b/netwerk/srtp/src/crypto/include/auth.h new file mode 100644 index 0000000000..774ea1687b --- /dev/null +++ b/netwerk/srtp/src/crypto/include/auth.h @@ -0,0 +1,173 @@ +/* + * auth.h + * + * common interface to authentication functions + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 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. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 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 HOLDERS 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 SRTP_AUTH_H +#define SRTP_AUTH_H + +#include "srtp.h" +#include "crypto_types.h" /* for values of auth_type_id_t */ + +#ifdef __cplusplus +extern "C" { +#endif + +typedef const struct srtp_auth_type_t *srtp_auth_type_pointer; +typedef struct srtp_auth_t *srtp_auth_pointer_t; + +typedef srtp_err_status_t (*srtp_auth_alloc_func)(srtp_auth_pointer_t *ap, + int key_len, + int out_len); + +typedef srtp_err_status_t (*srtp_auth_init_func)(void *state, + const uint8_t *key, + int key_len); + +typedef srtp_err_status_t (*srtp_auth_dealloc_func)(srtp_auth_pointer_t ap); + +typedef srtp_err_status_t (*srtp_auth_compute_func)(void *state, + const uint8_t *buffer, + int octets_to_auth, + int tag_len, + uint8_t *tag); + +typedef srtp_err_status_t (*srtp_auth_update_func)(void *state, + const uint8_t *buffer, + int octets_to_auth); + +typedef srtp_err_status_t (*srtp_auth_start_func)(void *state); + +/* some syntactic sugar on these function types */ +#define srtp_auth_type_alloc(at, a, klen, outlen) \ + ((at)->alloc((a), (klen), (outlen))) + +#define srtp_auth_init(a, key) \ + (((a)->type)->init((a)->state, (key), ((a)->key_len))) + +#define srtp_auth_compute(a, buf, len, res) \ + (((a)->type)->compute((a)->state, (buf), (len), (a)->out_len, (res))) + +#define srtp_auth_update(a, buf, len) \ + (((a)->type)->update((a)->state, (buf), (len))) + +#define srtp_auth_start(a) (((a)->type)->start((a)->state)) + +#define srtp_auth_dealloc(c) (((c)->type)->dealloc(c)) + +/* functions to get information about a particular auth_t */ +int srtp_auth_get_key_length(const struct srtp_auth_t *a); + +int srtp_auth_get_tag_length(const struct srtp_auth_t *a); + +int srtp_auth_get_prefix_length(const struct srtp_auth_t *a); + +/* + * srtp_auth_test_case_t is a (list of) key/message/tag values that are + * known to be correct for a particular cipher. this data can be used + * to test an implementation in an on-the-fly self test of the + * correctness of the implementation. (see the srtp_auth_type_self_test() + * function below) + */ +typedef struct srtp_auth_test_case_t { + int key_length_octets; /* octets in key */ + const uint8_t *key; /* key */ + int data_length_octets; /* octets in data */ + const uint8_t *data; /* data */ + int tag_length_octets; /* octets in tag */ + const uint8_t *tag; /* tag */ + const struct srtp_auth_test_case_t + *next_test_case; /* pointer to next testcase */ +} srtp_auth_test_case_t; + +/* srtp_auth_type_t */ +typedef struct srtp_auth_type_t { + srtp_auth_alloc_func alloc; + srtp_auth_dealloc_func dealloc; + srtp_auth_init_func init; + srtp_auth_compute_func compute; + srtp_auth_update_func update; + srtp_auth_start_func start; + const char *description; + const srtp_auth_test_case_t *test_data; + srtp_auth_type_id_t id; +} srtp_auth_type_t; + +typedef struct srtp_auth_t { + const srtp_auth_type_t *type; + void *state; + int out_len; /* length of output tag in octets */ + int key_len; /* length of key in octets */ + int prefix_len; /* length of keystream prefix */ +} srtp_auth_t; + +/* + * srtp_auth_type_self_test() tests an auth_type against test cases + * provided in an array of values of key/message/tag that is known to + * be good + */ +srtp_err_status_t srtp_auth_type_self_test(const srtp_auth_type_t *at); + +/* + * srtp_auth_type_test() tests an auth_type against external test cases + * provided in an array of values of key/message/tag that is known to + * be good + */ +srtp_err_status_t srtp_auth_type_test(const srtp_auth_type_t *at, + const srtp_auth_test_case_t *test_data); + +/* + * srtp_replace_auth_type(ct, id) + * + * replaces srtp's kernel's auth type implementation for the auth_type id + * with a new one passed in externally. The new auth type must pass all the + * existing auth_type's self tests as well as its own. + */ +srtp_err_status_t srtp_replace_auth_type(const srtp_auth_type_t *ct, + srtp_auth_type_id_t id); + +#ifdef __cplusplus +} +#endif + +#endif /* SRTP_AUTH_H */ |