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Diffstat (limited to 'srtp/crypto/kernel/crypto_kernel.c')
-rw-r--r--srtp/crypto/kernel/crypto_kernel.c523
1 files changed, 0 insertions, 523 deletions
diff --git a/srtp/crypto/kernel/crypto_kernel.c b/srtp/crypto/kernel/crypto_kernel.c
deleted file mode 100644
index 230dda6..0000000
--- a/srtp/crypto/kernel/crypto_kernel.c
+++ /dev/null
@@ -1,523 +0,0 @@
-/*
- * crypto_kernel.c
- *
- * header for the cryptographic kernel
- *
- * David A. McGrew
- * Cisco Systems, Inc.
- */
-/*
- *
- * Copyright(c) 2001-2006 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.
- *
- */
-
-
-#include "alloc.h"
-
-#include "crypto_kernel.h"
-
-/* the debug module for the crypto_kernel */
-
-debug_module_t mod_crypto_kernel = {
- 0, /* debugging is off by default */
- "crypto kernel" /* printable name for module */
-};
-
-/*
- * other debug modules that can be included in the kernel
- */
-
-extern debug_module_t mod_auth;
-extern debug_module_t mod_cipher;
-extern debug_module_t mod_stat;
-extern debug_module_t mod_alloc;
-
-/*
- * cipher types that can be included in the kernel
- */
-
-extern cipher_type_t null_cipher;
-extern cipher_type_t aes_icm;
-extern cipher_type_t aes_cbc;
-
-
-/*
- * auth func types that can be included in the kernel
- */
-
-extern auth_type_t null_auth;
-extern auth_type_t hmac;
-
-/* crypto_kernel is a global variable, the only one of its datatype */
-
-crypto_kernel_t
-crypto_kernel = {
- crypto_kernel_state_insecure, /* start off in insecure state */
- NULL, /* no cipher types yet */
- NULL, /* no auth types yet */
- NULL /* no debug modules yet */
-};
-
-#define MAX_RNG_TRIALS 25
-
-err_status_t
-crypto_kernel_init() {
- err_status_t status;
-
- /* check the security state */
- if (crypto_kernel.state == crypto_kernel_state_secure) {
-
- /*
- * we're already in the secure state, but we've been asked to
- * re-initialize, so we just re-run the self-tests and then return
- */
- return crypto_kernel_status();
- }
-
- /* initialize error reporting system */
- status = err_reporting_init("crypto");
- if (status)
- return status;
-
- /* load debug modules */
- status = crypto_kernel_load_debug_module(&mod_crypto_kernel);
- if (status)
- return status;
- status = crypto_kernel_load_debug_module(&mod_auth);
- if (status)
- return status;
- status = crypto_kernel_load_debug_module(&mod_cipher);
- if (status)
- return status;
- status = crypto_kernel_load_debug_module(&mod_stat);
- if (status)
- return status;
- status = crypto_kernel_load_debug_module(&mod_alloc);
- if (status)
- return status;
-
- /* initialize random number generator */
- status = rand_source_init();
- if (status)
- return status;
-
- /* run FIPS-140 statistical tests on rand_source */
- status = stat_test_rand_source_with_repetition(rand_source_get_octet_string, MAX_RNG_TRIALS);
- if (status)
- return status;
-
- /* initialize pseudorandom number generator */
- status = ctr_prng_init(rand_source_get_octet_string);
- if (status)
- return status;
-
- /* run FIPS-140 statistical tests on ctr_prng */
- status = stat_test_rand_source_with_repetition(ctr_prng_get_octet_string, MAX_RNG_TRIALS);
- if (status)
- return status;
-
- /* load cipher types */
- status = crypto_kernel_load_cipher_type(&null_cipher, NULL_CIPHER);
- if (status)
- return status;
- status = crypto_kernel_load_cipher_type(&aes_icm, AES_128_ICM);
- if (status)
- return status;
- status = crypto_kernel_load_cipher_type(&aes_cbc, AES_128_CBC);
- if (status)
- return status;
-
- /* load auth func types */
- status = crypto_kernel_load_auth_type(&null_auth, NULL_AUTH);
- if (status)
- return status;
- status = crypto_kernel_load_auth_type(&hmac, HMAC_SHA1);
- if (status)
- return status;
-
- /* change state to secure */
- crypto_kernel.state = crypto_kernel_state_secure;
-
- return err_status_ok;
-}
-
-err_status_t
-crypto_kernel_status() {
- err_status_t status;
- kernel_cipher_type_t *ctype = crypto_kernel.cipher_type_list;
- kernel_auth_type_t *atype = crypto_kernel.auth_type_list;
- kernel_debug_module_t *dm = crypto_kernel.debug_module_list;
-
- /* run FIPS-140 statistical tests on rand_source */
- printf("testing rand_source...");
- status = stat_test_rand_source_with_repetition(rand_source_get_octet_string, MAX_RNG_TRIALS);
- if (status) {
- printf("failed\n");
- crypto_kernel.state = crypto_kernel_state_insecure;
- return status;
- }
- printf("passed\n");
-
- /* for each cipher type, describe and test */
- while(ctype != NULL) {
- printf("cipher: %s\n", ctype->cipher_type->description);
- printf(" instance count: %d\n", ctype->cipher_type->ref_count);
- printf(" self-test: ");
- status = cipher_type_self_test(ctype->cipher_type);
- if (status) {
- printf("failed with error code %d\n", status);
- exit(status);
- }
- printf("passed\n");
- ctype = ctype->next;
- }
-
- /* for each auth type, describe and test */
- while(atype != NULL) {
- printf("auth func: %s\n", atype->auth_type->description);
- printf(" instance count: %d\n", atype->auth_type->ref_count);
- printf(" self-test: ");
- status = auth_type_self_test(atype->auth_type);
- if (status) {
- printf("failed with error code %d\n", status);
- exit(status);
- }
- printf("passed\n");
- atype = atype->next;
- }
-
- /* describe each debug module */
- printf("debug modules loaded:\n");
- while (dm != NULL) {
- printf(" %s ", dm->mod->name);
- if (dm->mod->on)
- printf("(on)\n");
- else
- printf("(off)\n");
- dm = dm->next;
- }
-
- return err_status_ok;
-}
-
-err_status_t
-crypto_kernel_list_debug_modules() {
- kernel_debug_module_t *dm = crypto_kernel.debug_module_list;
-
- /* describe each debug module */
- printf("debug modules loaded:\n");
- while (dm != NULL) {
- printf(" %s ", dm->mod->name);
- if (dm->mod->on)
- printf("(on)\n");
- else
- printf("(off)\n");
- dm = dm->next;
- }
-
- return err_status_ok;
-}
-
-err_status_t
-crypto_kernel_shutdown() {
- err_status_t status;
-
- /*
- * free dynamic memory used in crypto_kernel at present
- */
-
- /* walk down cipher type list, freeing memory */
- while (crypto_kernel.cipher_type_list != NULL) {
- kernel_cipher_type_t *ctype = crypto_kernel.cipher_type_list;
- crypto_kernel.cipher_type_list = ctype->next;
- debug_print(mod_crypto_kernel,
- "freeing memory for cipher %s",
- ctype->cipher_type->description);
- crypto_free(ctype);
- }
-
- /* walk down authetication module list, freeing memory */
- while (crypto_kernel.auth_type_list != NULL) {
- kernel_auth_type_t *atype = crypto_kernel.auth_type_list;
- crypto_kernel.auth_type_list = atype->next;
- debug_print(mod_crypto_kernel,
- "freeing memory for authentication %s",
- atype->auth_type->description);
- crypto_free(atype);
- }
-
- /* walk down debug module list, freeing memory */
- while (crypto_kernel.debug_module_list != NULL) {
- kernel_debug_module_t *kdm = crypto_kernel.debug_module_list;
- crypto_kernel.debug_module_list = kdm->next;
- debug_print(mod_crypto_kernel,
- "freeing memory for debug module %s",
- kdm->mod->name);
- crypto_free(kdm);
- }
-
- /* de-initialize random number generator */ status = rand_source_deinit();
- if (status)
- return status;
-
- /* return to insecure state */
- crypto_kernel.state = crypto_kernel_state_insecure;
-
- return err_status_ok;
-}
-
-err_status_t
-crypto_kernel_load_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id) {
- kernel_cipher_type_t *ctype, *new_ctype;
- err_status_t status;
-
- /* defensive coding */
- if (new_ct == NULL)
- return err_status_bad_param;
-
- /* check cipher type by running self-test */
- status = cipher_type_self_test(new_ct);
- if (status) {
- return status;
- }
-
- /* walk down list, checking if this type is in the list already */
- ctype = crypto_kernel.cipher_type_list;
- while (ctype != NULL) {
- if ((new_ct == ctype->cipher_type) || (id == ctype->id))
- return err_status_bad_param;
- ctype = ctype->next;
- }
-
- /* put new_ct at the head of the list */
- /* allocate memory */
- new_ctype = (kernel_cipher_type_t *) crypto_alloc(sizeof(kernel_cipher_type_t));
- if (new_ctype == NULL)
- return err_status_alloc_fail;
-
- /* set fields */
- new_ctype->cipher_type = new_ct;
- new_ctype->id = id;
- new_ctype->next = crypto_kernel.cipher_type_list;
-
- /* set head of list to new cipher type */
- crypto_kernel.cipher_type_list = new_ctype;
-
- /* load debug module, if there is one present */
- if (new_ct->debug != NULL)
- crypto_kernel_load_debug_module(new_ct->debug);
- /* we could check for errors here */
-
- return err_status_ok;
-}
-
-err_status_t
-crypto_kernel_load_auth_type(auth_type_t *new_at, auth_type_id_t id) {
- kernel_auth_type_t *atype, *new_atype;
- err_status_t status;
-
- /* defensive coding */
- if (new_at == NULL)
- return err_status_bad_param;
-
- /* check auth type by running self-test */
- status = auth_type_self_test(new_at);
- if (status) {
- return status;
- }
-
- /* walk down list, checking if this type is in the list already */
- atype = crypto_kernel.auth_type_list;
- while (atype != NULL) {
- if ((new_at == atype->auth_type) || (id == atype->id))
- return err_status_bad_param;
- atype = atype->next;
- }
-
- /* put new_at at the head of the list */
- /* allocate memory */
- new_atype = (kernel_auth_type_t *)crypto_alloc(sizeof(kernel_auth_type_t));
- if (new_atype == NULL)
- return err_status_alloc_fail;
-
- /* set fields */
- new_atype->auth_type = new_at;
- new_atype->id = id;
- new_atype->next = crypto_kernel.auth_type_list;
-
- /* set head of list to new auth type */
- crypto_kernel.auth_type_list = new_atype;
-
- /* load debug module, if there is one present */
- if (new_at->debug != NULL)
- crypto_kernel_load_debug_module(new_at->debug);
- /* we could check for errors here */
-
- return err_status_ok;
-
-}
-
-
-cipher_type_t *
-crypto_kernel_get_cipher_type(cipher_type_id_t id) {
- kernel_cipher_type_t *ctype;
-
- /* walk down list, looking for id */
- ctype = crypto_kernel.cipher_type_list;
- while (ctype != NULL) {
- if (id == ctype->id)
- return ctype->cipher_type;
- ctype = ctype->next;
- }
-
- /* haven't found the right one, indicate failure by returning NULL */
- return NULL;
-}
-
-
-err_status_t
-crypto_kernel_alloc_cipher(cipher_type_id_t id,
- cipher_pointer_t *cp,
- int key_len) {
- cipher_type_t *ct;
-
- /*
- * if the crypto_kernel is not yet initialized, we refuse to allocate
- * any ciphers - this is a bit extra-paranoid
- */
- if (crypto_kernel.state != crypto_kernel_state_secure)
- return err_status_init_fail;
-
- ct = crypto_kernel_get_cipher_type(id);
- if (!ct)
- return err_status_fail;
-
- return ((ct)->alloc(cp, key_len));
-}
-
-
-
-auth_type_t *
-crypto_kernel_get_auth_type(auth_type_id_t id) {
- kernel_auth_type_t *atype;
-
- /* walk down list, looking for id */
- atype = crypto_kernel.auth_type_list;
- while (atype != NULL) {
- if (id == atype->id)
- return atype->auth_type;
- atype = atype->next;
- }
-
- /* haven't found the right one, indicate failure by returning NULL */
- return NULL;
-}
-
-err_status_t
-crypto_kernel_alloc_auth(auth_type_id_t id,
- auth_pointer_t *ap,
- int key_len,
- int tag_len) {
- auth_type_t *at;
-
- /*
- * if the crypto_kernel is not yet initialized, we refuse to allocate
- * any auth functions - this is a bit extra-paranoid
- */
- if (crypto_kernel.state != crypto_kernel_state_secure)
- return err_status_init_fail;
-
- at = crypto_kernel_get_auth_type(id);
- if (!at)
- return err_status_fail;
-
- return ((at)->alloc(ap, key_len, tag_len));
-}
-
-err_status_t
-crypto_kernel_load_debug_module(debug_module_t *new_dm) {
- kernel_debug_module_t *kdm, *new;
-
- /* defensive coding */
- if (new_dm == NULL)
- return err_status_bad_param;
-
- /* walk down list, checking if this type is in the list already */
- kdm = crypto_kernel.debug_module_list;
- while (kdm != NULL) {
- if (strncmp(new_dm->name, kdm->mod->name, 64) == 0)
- return err_status_bad_param;
- kdm = kdm->next;
- }
-
- /* put new_dm at the head of the list */
- /* allocate memory */
- new = (kernel_debug_module_t *)crypto_alloc(sizeof(kernel_debug_module_t));
- if (new == NULL)
- return err_status_alloc_fail;
-
- /* set fields */
- new->mod = new_dm;
- new->next = crypto_kernel.debug_module_list;
-
- /* set head of list to new cipher type */
- crypto_kernel.debug_module_list = new;
-
- return err_status_ok;
-}
-
-err_status_t
-crypto_kernel_set_debug_module(char *name, int on) {
- kernel_debug_module_t *kdm;
-
- /* walk down list, checking if this type is in the list already */
- kdm = crypto_kernel.debug_module_list;
- while (kdm != NULL) {
- if (strncmp(name, kdm->mod->name, 64) == 0) {
- kdm->mod->on = on;
- return err_status_ok;
- }
- kdm = kdm->next;
- }
-
- return err_status_fail;
-}
-
-err_status_t
-crypto_get_random(unsigned char *buffer, unsigned int length) {
- if (crypto_kernel.state == crypto_kernel_state_secure)
- return ctr_prng_get_octet_string(buffer, length);
- else
- return err_status_fail;
-}
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