Update libsrtp to version 2.0

srtp/crypto/kernel/crypto_kernel.c

Index: srtp/crypto/kernel/crypto_kernel.c
diff --git a/srtp/crypto/kernel/crypto_kernel.c b/srtp/crypto/kernel/crypto_kernel.c
deleted file mode 100644
index 518cd1e61512e18e2e3694df374620b3e99fe3cb..0000000000000000000000000000000000000000
--- a/srtp/crypto/kernel/crypto_kernel.c
+++ /dev/null
@@ -1,614 +0,0 @@
-/*
- * crypto_kernel.c
- *
- * header for the cryptographic kernel
- *
- * David A. McGrew
- * Cisco Systems, Inc.
- */
-/*
- *	
- * Copyright(c) 2001-2006,2013 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.
- *
- */
-
-
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
-#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;
-#ifndef OPENSSL
-extern cipher_type_t aes_cbc;
-#else
-#ifndef SRTP_NO_AES192
-extern cipher_type_t aes_icm_192;
-#endif
-extern cipher_type_t aes_icm_256;
-extern cipher_type_t aes_gcm_128_openssl;
-extern cipher_type_t aes_gcm_256_openssl;
-#endif
-
-
-/*
- * 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;
-
-#ifndef OPENSSL
-  /* 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;
-#endif
- 
-  /* 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_ICM);
-  if (status) 
-    return status;
-#ifndef OPENSSL
-  status = crypto_kernel_load_cipher_type(&aes_cbc, AES_CBC);
-  if (status) 
-    return status;
-#else
-#ifndef SRTP_NO_AES192
-  status = crypto_kernel_load_cipher_type(&aes_icm_192, AES_192_ICM);
-  if (status) {
-    return status;
-  }
-#endif
-  status = crypto_kernel_load_cipher_type(&aes_icm_256, AES_256_ICM);
-  if (status) {
-    return status;
-  }
-  status = crypto_kernel_load_cipher_type(&aes_gcm_128_openssl, AES_128_GCM);
-  if (status) {
-      return status;
-  }
-  status = crypto_kernel_load_cipher_type(&aes_gcm_256_openssl, AES_256_GCM);
-  if (status) {
-      return status;
-  }
-#endif
-
-  /* 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;
-}
-
-static inline err_status_t
-crypto_kernel_do_load_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id,
-				  int replace) {
-  kernel_cipher_type_t *ctype, *new_ctype;
-  err_status_t status;
-
-  /* defensive coding */
-  if (new_ct == NULL)
-    return err_status_bad_param;
-
-  if (new_ct->id != id)
-    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 (id == ctype->id) {
-      if (!replace)
-	return err_status_bad_param;
-      status = cipher_type_test(new_ct, ctype->cipher_type->test_data);
-      if (status)
-	return status;
-      new_ctype = ctype;
-      break;
-    }
-    else if (new_ct == ctype->cipher_type)
-      return err_status_bad_param;    
-    ctype = ctype->next;
-  }
-
-  /* if not found, put new_ct at the head of the list */
-  if (ctype == NULL) {
-  /* allocate memory */
-    new_ctype = (kernel_cipher_type_t *) crypto_alloc(sizeof(kernel_cipher_type_t));
-    if (new_ctype == NULL)
-      return err_status_alloc_fail;
-    new_ctype->next = crypto_kernel.cipher_type_list;
-
-    /* set head of list to new cipher type */
-    crypto_kernel.cipher_type_list = new_ctype;    
-  }
-    
-  /* set fields */
-  new_ctype->cipher_type = new_ct;
-  new_ctype->id = id;
-
-  /* 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_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id) {
-  return crypto_kernel_do_load_cipher_type(new_ct, id, 0);
-}
-
-err_status_t
-crypto_kernel_replace_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id) {
-  return crypto_kernel_do_load_cipher_type(new_ct, id, 1);
-}
-
-err_status_t
-crypto_kernel_do_load_auth_type(auth_type_t *new_at, auth_type_id_t id,
-				int replace) {
-  kernel_auth_type_t *atype, *new_atype;
-  err_status_t status;
-
-  /* defensive coding */
-  if (new_at == NULL)
-    return err_status_bad_param;
-
-  if (new_at->id != id)
-    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 (id == atype->id) {
-      if (!replace)
-	return err_status_bad_param;
-      status = auth_type_test(new_at, atype->auth_type->test_data);
-      if (status)
-	return status;
-      new_atype = atype;
-      break;
-    }
-    else if (new_at == atype->auth_type)
-      return err_status_bad_param;    
-    atype = atype->next;
-  }
-
-  /* if not found, put new_at at the head of the list */
-  if (atype == NULL) {
-    /* allocate memory */
-    new_atype = (kernel_auth_type_t *)crypto_alloc(sizeof(kernel_auth_type_t));
-    if (new_atype == NULL)
-      return err_status_alloc_fail;
-
-    new_atype->next = crypto_kernel.auth_type_list;
-    /* set head of list to new auth type */
-    crypto_kernel.auth_type_list = new_atype;
-  }
-    
-  /* set fields */
-  new_atype->auth_type = new_at;
-  new_atype->id = id;
-
-  /* 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;
-
-}
-
-err_status_t
-crypto_kernel_load_auth_type(auth_type_t *new_at, auth_type_id_t id) {
-  return crypto_kernel_do_load_auth_type(new_at, id, 0);
-}
-
-err_status_t
-crypto_kernel_replace_auth_type(auth_type_t *new_at, auth_type_id_t id) {
-  return crypto_kernel_do_load_auth_type(new_at, id, 1);
-}
-
-
-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,
-			      int tag_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, tag_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)
-#ifdef OPENSSL
-    return rand_source_get_octet_string(buffer, length);
-#else
-    return ctr_prng_get_octet_string(buffer, length);
-#endif
-  else
-    return err_status_fail;
-}