add srtp

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1086 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/srtp/crypto/kernel/CVS/Entries

@@ -0,0 +1,5 @@
+/alloc.c/1.3/Wed Oct  5 11:50:56 2005//
+/crypto_kernel.c/1.5/Fri Mar 17 20:51:24 2006//
+/err.c/1.5/Tue Oct 18 15:26:31 2005//
+/key.c/1.6/Sun Oct  2 20:33:10 2005//
+D

libs/srtp/crypto/kernel/CVS/Repository

@@ -0,0 +1 @@
+srtp/crypto/kernel

libs/srtp/crypto/kernel/CVS/Root

@@ -0,0 +1 @@
+:pserver:anonymous@cvs.sourceforge.net:/cvsroot/srtp

libs/srtp/crypto/kernel/alloc.c

@@ -0,0 +1,119 @@
+/*
+ * alloc.c
+ *
+ * memory allocation and deallocation 
+ *
+ * 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.
+ *
+ */
+
+#include "alloc.h"
+#include "crypto_kernel.h"
+
+/* the debug module for memory allocation */
+
+debug_module_t mod_alloc = {
+  0,                  /* debugging is off by default */
+  "alloc"             /* printable name for module   */
+};
+
+/*
+ * Nota bene: the debugging statements for crypto_alloc() and
+ * crypto_free() have identical prefixes, which include the addresses
+ * of the memory locations on which they are operating.  This fact can
+ * be used to locate memory leaks, by turning on memory debugging,
+ * grepping for 'alloc', then matching alloc and free calls by
+ * address.
+ */
+
+#ifdef SRTP_KERNEL_LINUX
+
+#include <linux/interrupt.h>
+
+void *
+crypto_alloc(size_t size) {
+  void *ptr;
+
+  ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+
+  if (ptr) {
+    debug_print(mod_alloc, "(location: %p) allocated", ptr);
+  } else
+    debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
+
+  return ptr;
+}
+
+void 
+crypto_free(void *ptr) {
+
+  debug_print(mod_alloc, "(location: %p) freed", ptr);
+
+  kfree(ptr);
+}
+
+
+#elif defined(HAVE_STDLIB_H)
+
+void *
+crypto_alloc(size_t size) {
+  void *ptr;
+
+  ptr = malloc(size);
+    
+  if (ptr) {
+    debug_print(mod_alloc, "(location: %p) allocated", ptr);
+  } else
+    debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
+    
+  return ptr;
+}
+
+void 
+crypto_free(void *ptr) {
+
+  debug_print(mod_alloc, "(location: %p) freed", ptr);
+
+  free(ptr);
+}
+
+#else  /* we need to define our own memory allocation routines */
+
+#error no memory allocation defined yet 
+
+#endif

libs/srtp/crypto/kernel/crypto_kernel.c

@@ -0,0 +1,523 @@
+/*
+ * crypto_kernel.c
+ *
+ * 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.
+ *
+ */
+
+
+#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;
+  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 = (kernel_cipher_type_t *) crypto_alloc(sizeof(kernel_cipher_type_t));
+  if (new == NULL)
+    return err_status_alloc_fail;
+    
+  /* set fields */
+  new->cipher_type = new_ct;
+  new->id = id;
+  new->next = crypto_kernel.cipher_type_list;
+
+  /* set head of list to new cipher type */
+  crypto_kernel.cipher_type_list = new;    
+
+  /* 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;
+  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 = (kernel_auth_type_t *)crypto_alloc(sizeof(kernel_auth_type_t));
+  if (new == NULL)
+    return err_status_alloc_fail;
+    
+  /* set fields */
+  new->auth_type = new_at;
+  new->id = id;
+  new->next = crypto_kernel.auth_type_list;
+
+  /* set head of list to new auth type */
+  crypto_kernel.auth_type_list = new;    
+
+  /* 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;
+}

libs/srtp/crypto/kernel/err.c

@@ -0,0 +1,148 @@
+/*
+ * err.c
+ *
+ * error status reporting functions
+ *
+ * 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.
+ *
+ */
+
+#include "err.h"
+
+#ifdef ERR_REPORTING_SYSLOG
+# ifdef HAVE_SYSLOG_H
+#  include <syslog.h>
+# endif
+#endif
+
+
+/*  err_level reflects the level of errors that are reported  */
+
+err_reporting_level_t err_level = err_level_none;
+
+#ifdef SRTP_KERNEL_LINUX
+err_status_t
+err_reporting_init(char *ident) {
+
+  return err_status_ok;
+}
+
+#else /* SRTP_KERNEL_LINUX */	
+
+/* err_file is the FILE to which errors are reported */
+
+static FILE *err_file = NULL;
+
+err_status_t
+err_reporting_init(char *ident) {
+#ifdef ERR_REPORTING_SYSLOG
+  openlog(ident, LOG_PID, LOG_AUTHPRIV);
+#endif
+  
+  /*
+   * Believe it or not, openlog doesn't return an error on failure.
+   * But then, neither does the syslog() call...
+   */
+
+#ifdef ERR_REPORTING_STDOUT
+  err_file = stdout;
+#elif defined(USE_ERR_REPORTING_FILE)
+  /* open file for error reporting */
+  err_file = fopen(ERR_REPORTING_FILE, "w");
+  if (err_file == NULL)
+    return err_status_init_fail;
+#endif
+
+  return err_status_ok;
+}
+
+void
+err_report(int priority, char *format, ...) {
+  va_list args;
+
+  if (priority <= err_level) {
+
+    va_start(args, format);
+    if (err_file != NULL) {
+      vfprintf(err_file, format, args);
+	  /*      fprintf(err_file, "\n"); */
+    }
+#ifdef ERR_REPORTING_SYSLOG
+    if (1) { /* FIXME: Make this a runtime option. */
+      int syslogpri;
+
+      switch (priority) {
+      case err_level_emergency:
+	syslogpri = LOG_EMERG;
+	break;
+      case err_level_alert:
+	syslogpri = LOG_ALERT;
+	break;
+      case err_level_critical:
+	syslogpri = LOG_CRIT;
+	break;
+      case err_level_error:
+	syslogpri = LOG_ERR;
+	break;
+      case err_level_warning:
+	syslogpri = LOG_WARNING;
+	break;
+      case err_level_notice:
+	syslogpri = LOG_NOTICE;
+	break;
+      case err_level_info:
+	syslogpri = LOG_INFO;
+	break;
+      case err_level_debug:
+      case err_level_none:
+      default:
+	syslogpri = LOG_DEBUG;
+	break;
+      }
+
+      vsyslog(syslogpri, format, args);
+#endif
+    va_end(args);
+  }
+}
+#endif /* SRTP_KERNEL_LINUX */	
+
+void
+err_reporting_set_level(err_reporting_level_t lvl) { 
+  err_level = lvl;
+}

libs/srtp/crypto/kernel/key.c

@@ -0,0 +1,115 @@
+/*
+ * key.c
+ *
+ * key usage limits enforcement
+ * 
+ * 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.
+ *
+ */
+
+#include "key.h"
+
+#define soft_limit 0x10000
+
+err_status_t
+key_limit_set(key_limit_t key, const xtd_seq_num_t s) {
+#ifdef NO_64BIT_MATH
+  if (high32(s) == 0 && low32(s) < soft_limit)
+    return err_status_bad_param;
+#else
+  if (s < soft_limit)
+    return err_status_bad_param;
+#endif
+  key->num_left = s;
+  key->state = key_state_normal;
+  return err_status_ok;
+}
+
+err_status_t
+key_limit_clone(key_limit_t original, key_limit_t *new_key) {
+  if (original == NULL)
+    return err_status_bad_param;
+  *new_key = original;
+  return err_status_ok;
+}
+
+err_status_t
+key_limit_check(const key_limit_t key) {
+  if (key->state == key_state_expired)
+    return err_status_key_expired;
+  return err_status_ok;
+}
+
+key_event_t
+key_limit_update(key_limit_t key) {
+#ifdef NO_64BIT_MATH
+  if (low32(key->num_left) == 0)
+  {
+	  // carry
+	  key->num_left = make64(high32(key->num_left)-1,low32(key->num_left) - 1);
+  }
+  else
+  {
+	  // no carry
+	  key->num_left = make64(high32(key->num_left),low32(key->num_left) - 1);
+  }
+  if (high32(key->num_left) != 0 || low32(key->num_left) >= soft_limit) {
+    return key_event_normal;   /* we're above the soft limit */
+  }
+#else
+  key->num_left--;
+  if (key->num_left >= soft_limit) {
+    return key_event_normal;   /* we're above the soft limit */
+  }
+#endif
+  if (key->state == key_state_normal) {
+    /* we just passed the soft limit, so change the state */
+    key->state = key_state_past_soft_limit;
+  }
+#ifdef NO_64BIT_MATH
+  if (low32(key->num_left) == 0 && high32(key->num_left == 0))
+#else
+  if (key->num_left < 1)
+#endif
+  { /* we just hit the hard limit */
+    key->state = key_state_expired;
+    return key_event_hard_limit;
+  }
+   return key_event_soft_limit;
+}
+