289 lines
7.7 KiB
C
289 lines
7.7 KiB
C
/*
|
|
* crypto_kernel.h
|
|
*
|
|
* header for the cryptographic kernel
|
|
*
|
|
* David A. McGrew
|
|
* Cisco Systems, Inc.
|
|
*/
|
|
/*
|
|
*
|
|
* Copyright(c) 2001-2005 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 CRYPTO_KERNEL
|
|
#define CRYPTO_KERNEL
|
|
|
|
#include "rand_source.h"
|
|
#include "prng.h"
|
|
#include "cipher.h"
|
|
#include "auth.h"
|
|
#include "cryptoalg.h"
|
|
#include "stat.h"
|
|
#include "err.h"
|
|
#include "crypto_types.h"
|
|
#include "key.h"
|
|
|
|
|
|
/*
|
|
* crypto_kernel_state_t defines the possible states:
|
|
*
|
|
* insecure - not yet initialized
|
|
* secure - initialized and passed self-tests
|
|
*/
|
|
|
|
typedef enum {
|
|
crypto_kernel_state_insecure,
|
|
crypto_kernel_state_secure
|
|
} crypto_kernel_state_t;
|
|
|
|
|
|
/**
|
|
* @brief A cipher_type_id_t is an identifier for a particular cipher
|
|
* type.
|
|
*
|
|
* A cipher_type_id_t is an integer that represents a particular
|
|
* cipher type, e.g. the Advanced Encryption Standard (AES). A
|
|
* NULL_CIPHER is avaliable; this cipher leaves the data unchanged,
|
|
* and can be selected to indicate that no encryption is to take
|
|
* place.
|
|
*
|
|
* @ingroup Ciphers
|
|
*/
|
|
typedef uint32_t cipher_type_id_t;
|
|
|
|
/**
|
|
* @brief An auth_type_id_t is an identifier for a particular authentication
|
|
* function.
|
|
*
|
|
* An auth_type_id_t is an integer that represents a particular
|
|
* authentication function type, e.g. HMAC-SHA1. A NULL_AUTH is
|
|
* avaliable; this authentication function performs no computation,
|
|
* and can be selected to indicate that no authentication is to take
|
|
* place.
|
|
*
|
|
* @ingroup Authentication
|
|
*/
|
|
typedef uint32_t auth_type_id_t;
|
|
|
|
|
|
/*
|
|
* linked list of cipher types
|
|
*/
|
|
|
|
typedef struct kernel_cipher_type {
|
|
cipher_type_id_t id;
|
|
cipher_type_t *cipher_type;
|
|
struct kernel_cipher_type *next;
|
|
} kernel_cipher_type_t;
|
|
|
|
/*
|
|
* linked list of auth types
|
|
*/
|
|
|
|
typedef struct kernel_auth_type {
|
|
auth_type_id_t id;
|
|
auth_type_t *auth_type;
|
|
struct kernel_auth_type *next;
|
|
} kernel_auth_type_t;
|
|
|
|
/*
|
|
* linked list of debug modules
|
|
*/
|
|
|
|
typedef struct kernel_debug_module {
|
|
debug_module_t *mod;
|
|
struct kernel_debug_module *next;
|
|
} kernel_debug_module_t;
|
|
|
|
|
|
/*
|
|
* crypto_kernel_t is the data structure for the crypto kernel
|
|
*
|
|
* note that there is *exactly one* instance of this data type,
|
|
* a global variable defined in crypto_kernel.c
|
|
*/
|
|
|
|
typedef struct {
|
|
crypto_kernel_state_t state; /* current state of kernel */
|
|
kernel_cipher_type_t *cipher_type_list; /* list of all cipher types */
|
|
kernel_auth_type_t *auth_type_list; /* list of all auth func types */
|
|
kernel_debug_module_t *debug_module_list; /* list of all debug modules */
|
|
} crypto_kernel_t;
|
|
|
|
|
|
/*
|
|
* crypto_kernel_t external api
|
|
*/
|
|
|
|
|
|
/*
|
|
* The function crypto_kernel_init() initialized the crypto kernel and
|
|
* runs the self-test operations on the random number generators and
|
|
* crypto algorithms. Possible return values are:
|
|
*
|
|
* err_status_ok initialization successful
|
|
* <other> init failure
|
|
*
|
|
* If any value other than err_status_ok is returned, the
|
|
* crypto_kernel MUST NOT be used.
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_init(void);
|
|
|
|
|
|
/*
|
|
* The function crypto_kernel_shutdown() de-initializes the
|
|
* crypto_kernel, zeroizes keys and other cryptographic material, and
|
|
* deallocates any dynamically allocated memory. Possible return
|
|
* values are:
|
|
*
|
|
* err_status_ok shutdown successful
|
|
* <other> shutdown failure
|
|
*
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_shutdown(void);
|
|
|
|
/*
|
|
* The function crypto_kernel_stats() checks the the crypto_kernel,
|
|
* running tests on the ciphers, auth funcs, and rng, and prints out a
|
|
* status report. Possible return values are:
|
|
*
|
|
* err_status_ok all tests were passed
|
|
* <other> a test failed
|
|
*
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_status(void);
|
|
|
|
|
|
/*
|
|
* crypto_kernel_list_debug_modules() outputs a list of debugging modules
|
|
*
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_list_debug_modules(void);
|
|
|
|
/*
|
|
* crypto_kernel_load_cipher_type()
|
|
*
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_load_cipher_type(cipher_type_t *ct, cipher_type_id_t id);
|
|
|
|
err_status_t
|
|
crypto_kernel_load_auth_type(auth_type_t *ct, auth_type_id_t id);
|
|
|
|
err_status_t
|
|
crypto_kernel_load_debug_module(debug_module_t *new_dm);
|
|
|
|
/*
|
|
* crypto_kernel_alloc_cipher(id, cp, key_len);
|
|
*
|
|
* allocates a cipher of type id at location *cp, with key length
|
|
* key_len octets. Return values are:
|
|
*
|
|
* err_status_ok no problems
|
|
* err_status_alloc_fail an allocation failure occured
|
|
* err_status_fail couldn't find cipher with identifier 'id'
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_alloc_cipher(cipher_type_id_t id,
|
|
cipher_pointer_t *cp,
|
|
int key_len);
|
|
|
|
/*
|
|
* crypto_kernel_alloc_auth(id, ap, key_len, tag_len);
|
|
*
|
|
* allocates an auth function of type id at location *ap, with key
|
|
* length key_len octets and output tag length of tag_len. Return
|
|
* values are:
|
|
*
|
|
* err_status_ok no problems
|
|
* err_status_alloc_fail an allocation failure occured
|
|
* err_status_fail couldn't find auth with identifier 'id'
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_alloc_auth(auth_type_id_t id,
|
|
auth_pointer_t *ap,
|
|
int key_len,
|
|
int tag_len);
|
|
|
|
|
|
/*
|
|
* crypto_kernel_set_debug_module(mod_name, v)
|
|
*
|
|
* sets dynamic debugging to the value v (0 for off, 1 for on) for the
|
|
* debug module with the name mod_name
|
|
*
|
|
* returns err_status_ok on success, err_status_fail otherwise
|
|
*/
|
|
|
|
err_status_t
|
|
crypto_kernel_set_debug_module(char *mod_name, int v);
|
|
|
|
/**
|
|
* @brief writes a random octet string.
|
|
*
|
|
* The function call crypto_get_random(dest, len) writes len octets of
|
|
* random data to the location to which dest points, and returns an
|
|
* error code. This error code @b must be checked, and if a failure is
|
|
* reported, the data in the buffer @b must @b not be used.
|
|
*
|
|
* @warning If the return code is not checked, then non-random
|
|
* data may be in the buffer. This function will fail
|
|
* unless it is called after crypto_kernel_init().
|
|
*
|
|
* @return
|
|
* - err_status_ok if no problems occured.
|
|
* - [other] a problem occured, and no assumptions should
|
|
* be made about the contents of the destination
|
|
* buffer.
|
|
*
|
|
* @ingroup SRTP
|
|
*/
|
|
err_status_t
|
|
crypto_get_random(unsigned char *buffer, unsigned int length);
|
|
|
|
#endif /* CRYPTO_KERNEL */
|