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215 lines
6.7 KiB
C
215 lines
6.7 KiB
C
/*
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* crypto_kernel.h
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*
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* header for the cryptographic kernel
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*
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* David A. McGrew
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* Cisco Systems, Inc.
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*/
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/*
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*
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* Copyright(c) 2001-2017 Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef CRYPTO_KERNEL
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#define CRYPTO_KERNEL
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#include "cipher.h"
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#include "auth.h"
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#include "err.h"
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#include "crypto_types.h"
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#include "key.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* crypto_kernel_state_t defines the possible states:
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*
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* insecure - not yet initialized
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* secure - initialized and passed self-tests
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*/
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typedef enum {
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srtp_crypto_kernel_state_insecure,
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srtp_crypto_kernel_state_secure
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} srtp_crypto_kernel_state_t;
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/*
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* linked list of cipher types
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*/
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typedef struct srtp_kernel_cipher_type {
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srtp_cipher_type_id_t id;
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const srtp_cipher_type_t *cipher_type;
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struct srtp_kernel_cipher_type *next;
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} srtp_kernel_cipher_type_t;
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/*
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* linked list of auth types
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*/
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typedef struct srtp_kernel_auth_type {
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srtp_auth_type_id_t id;
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const srtp_auth_type_t *auth_type;
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struct srtp_kernel_auth_type *next;
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} srtp_kernel_auth_type_t;
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/*
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* linked list of debug modules
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*/
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typedef struct srtp_kernel_debug_module {
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srtp_debug_module_t *mod;
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struct srtp_kernel_debug_module *next;
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} srtp_kernel_debug_module_t;
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/*
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* crypto_kernel_t is the data structure for the crypto kernel
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*
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* note that there is *exactly one* instance of this data type,
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* a global variable defined in crypto_kernel.c
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*/
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typedef struct {
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srtp_crypto_kernel_state_t state; /* current state of kernel */
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srtp_kernel_cipher_type_t *cipher_type_list; /* list of all cipher types */
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srtp_kernel_auth_type_t *auth_type_list; /* list of all auth func types */
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srtp_kernel_debug_module_t
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*debug_module_list; /* list of all debug modules */
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} srtp_crypto_kernel_t;
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/*
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* srtp_crypto_kernel_t external api
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*/
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/*
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* The function srtp_crypto_kernel_init() initialized the crypto kernel and
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* runs the self-test operations on the random number generators and
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* crypto algorithms. Possible return values are:
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*
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* srtp_err_status_ok initialization successful
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* <other> init failure
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*
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* If any value other than srtp_err_status_ok is returned, the
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* crypto_kernel MUST NOT be used.
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*/
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srtp_err_status_t srtp_crypto_kernel_init(void);
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/*
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* The function srtp_crypto_kernel_shutdown() de-initializes the
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* crypto_kernel, zeroizes keys and other cryptographic material, and
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* deallocates any dynamically allocated memory. Possible return
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* values are:
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*
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* srtp_err_status_ok shutdown successful
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* <other> shutdown failure
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*
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*/
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srtp_err_status_t srtp_crypto_kernel_shutdown(void);
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/*
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* The function srtp_crypto_kernel_stats() checks the the crypto_kernel,
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* running tests on the ciphers, auth funcs, and rng, and prints out a
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* status report. Possible return values are:
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*
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* srtp_err_status_ok all tests were passed
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* <other> a test failed
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*
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*/
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srtp_err_status_t srtp_crypto_kernel_status(void);
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/*
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* srtp_crypto_kernel_list_debug_modules() outputs a list of debugging modules
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*
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*/
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srtp_err_status_t srtp_crypto_kernel_list_debug_modules(void);
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/*
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* srtp_crypto_kernel_load_cipher_type()
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*
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*/
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srtp_err_status_t srtp_crypto_kernel_load_cipher_type(
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const srtp_cipher_type_t *ct,
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srtp_cipher_type_id_t id);
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srtp_err_status_t srtp_crypto_kernel_load_auth_type(const srtp_auth_type_t *ct,
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srtp_auth_type_id_t id);
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srtp_err_status_t srtp_crypto_kernel_load_debug_module(
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srtp_debug_module_t *new_dm);
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/*
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* srtp_crypto_kernel_alloc_cipher(id, cp, key_len);
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*
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* allocates a cipher of type id at location *cp, with key length
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* key_len octets. Return values are:
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*
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* srtp_err_status_ok no problems
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* srtp_err_status_alloc_fail an allocation failure occured
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* srtp_err_status_fail couldn't find cipher with identifier 'id'
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*/
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srtp_err_status_t srtp_crypto_kernel_alloc_cipher(srtp_cipher_type_id_t id,
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srtp_cipher_pointer_t *cp,
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int key_len,
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int tag_len);
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/*
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* srtp_crypto_kernel_alloc_auth(id, ap, key_len, tag_len);
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*
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* allocates an auth function of type id at location *ap, with key
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* length key_len octets and output tag length of tag_len. Return
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* values are:
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*
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* srtp_err_status_ok no problems
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* srtp_err_status_alloc_fail an allocation failure occured
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* srtp_err_status_fail couldn't find auth with identifier 'id'
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*/
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srtp_err_status_t srtp_crypto_kernel_alloc_auth(srtp_auth_type_id_t id,
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srtp_auth_pointer_t *ap,
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int key_len,
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int tag_len);
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/*
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* srtp_crypto_kernel_set_debug_module(mod_name, v)
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*
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* sets dynamic debugging to the value v (0 for off, 1 for on) for the
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* debug module with the name mod_name
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*
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* returns srtp_err_status_ok on success, srtp_err_status_fail otherwise
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*/
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srtp_err_status_t srtp_crypto_kernel_set_debug_module(const char *mod_name,
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int v);
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#ifdef __cplusplus
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}
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#endif
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#endif /* CRYPTO_KERNEL */
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