removed onion.c and onion.h from common/

they're now in or/onion.c


svn:r21

3 files changed, 2 insertions, 791 deletions

diff --git a/src/common/Makefile.am b/src/common/Makefile.am
index f7fa778f1..5a110d0dd 100644
--- a/src/common/Makefile.am
+++ b/src/common/Makefile.am
@@ -3,12 +3,12 @@ noinst_LIBRARIES = libor.a
 
 #CFLAGS  = -Wall -Wpointer-arith -O2
 
-libor_a_SOURCES = cell.c config.c key.c log.c onion.c opcell.c \
+libor_a_SOURCES = cell.c config.c key.c log.c opcell.c \
                      routent.c scheduler.c utils.c
 
 # ss.h is not used anywhere, distributing it just because
 
-noinst_HEADERS = cell.h config.h key.h log.h onion.h opcell.h \
+noinst_HEADERS = cell.h config.h key.h log.h opcell.h \
 		     policies.h routent.h scheduler.h utils.h \
                      ss.h version.h
 
diff --git a/src/common/onion.c b/src/common/onion.c
deleted file mode 100644
index 2b42f3d95..000000000
--- a/src/common/onion.c
+++ /dev/null
@@ -1,633 +0,0 @@
-/**
- * onion.c 
- * Routines for creating/manipulating onions.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.24  2002/06/14 20:42:02  mp292
- * Bug caused infinite loop when router list had <= 2 entries.
- *
- * Revision 1.23  2002/04/02 14:27:11  badbytes
- * Final finishes.
- *
- * Revision 1.22  2002/04/02 10:20:09  badbytes
- * Memory overflow bug.
- *
- * Revision 1.21  2002/03/25 09:11:23  badbytes
- * Added a list of onions being tracked for replay attacks.
- *
- * Revision 1.20  2002/03/12 23:32:41  mp292
- * *** empty log message ***
- *
- * Revision 1.19  2002/01/27 19:23:21  mp292
- * Fixed a bug in parameter checking.
- *
- * Revision 1.18  2002/01/26 19:24:29  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.17  2002/01/18 20:40:40  mp292
- * Fixed a bug in en/decrypt_onion() functions.
- *
- * Revision 1.16  2002/01/17 23:48:31  mp292
- * Added some extra debugging messages to fix a bug in encrypt_onion() which
- * seems to corrupt the routent *route list.
- *
- * Revision 1.15  2002/01/17 15:00:43  mp292
- * Fixed a bug which caused malloc() generate a seg fault.
- *
- * Revision 1.14  2002/01/16 23:01:54  mp292
- * First phase of system testing completed (main functionality).
- *
- * Revision 1.13  2002/01/14 13:05:37  badbytes
- * System testing in progress.
- *
- * Revision 1.12  2002/01/11 15:47:17  badbytes
- * *** empty log message ***
- *
- * Revision 1.11  2002/01/09 07:58:23  badbytes
- * Fixed a bug so that backward crypto engines are now initialized with DecryptInit.
- *
- * Revision 1.10  2002/01/09 07:55:23  badbytes
- * Ciphers got out of sync. Hopefully fixed.
- *
- * Revision 1.9  2002/01/03 11:01:22  badbytes
- * *** empty log message ***
- *
- * Revision 1.8  2001/12/19 08:29:00  badbytes
- * Macro DEFAULT_CIPHER now holds the default crypto algorithm
- *
- * Revision 1.7  2001/12/18 14:12:47  badbytes
- * Default cipher is now IDENTITY, for testing purposes.
- *
- * Revision 1.6  2001/12/18 10:36:51  badbytes
- * create_onion() now also computes a crypt_path
- *
- * Revision 1.5  2001/12/17 13:35:17  badbytes
- * Still writing handle_connection()
- *
- * Revision 1.4  2001/12/14 14:44:37  badbytes
- * chooselen() tested
- *
- * Revision 1.3  2001/12/14 13:30:48  badbytes
- * peel_onion() was redundant, removed it
- *
- * Revision 1.2  2001/12/14 13:14:03  badbytes
- * Split types.h into routent.h and ss.h. Keeping them all in one file created unnecesary dependencies.
- *
- * Revision 1.1  2001/12/14 12:41:12  badbytes
- * Moved from op/ as it will be reused by other modules.
- *
- * Revision 1.1  2001/12/13 15:15:10  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <string.h>
-#include <time.h>
-
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/sha.h>
-#include <openssl/evp.h>
-
-#include "onion.h"
-#include "log.h"
-
-/* uses a weighted coin with weight cw to choose a route length */
-int chooselen(double cw)
-{
-  int len = 2;
-  int retval = 0;
-  unsigned char coin;
-  
-  if ((cw < 0) || (cw >= 1)) /* invalid parameter */
-    return -1;
-  
-  while(1)
-  {
-    retval = RAND_pseudo_bytes(&coin,1);
-    if (retval == -1)
-      return -1;
-    
-    if (coin > cw*255) /* don't extend */
-      break;
-    else
-      len++;
-  }
-  
-  return len;
-}
-
-/* returns an array of pointers to routent that define a new route through the OR network
- * int cw is the coin weight to use when choosing the route 
- * order of routers is from last to first
- */
-unsigned int *new_route(double cw, routent_t **rarray, size_t rarray_len, size_t *rlen)
-{
-  int routelen = 0;
-  int i = 0;
-  int retval = 0;
-  unsigned int *route = NULL;
-  unsigned int oldchoice, choice;
-  
-  if ( (cw >= 0) && (cw < 1) && (rarray) && (rlen) ) /* valid parameters */
-  {
-    routelen = chooselen(cw);
-    if (routelen == -1)
-    {
-      log(LOG_ERR,"Choosing route length failed.");
-      return NULL;
-    }
-    log(LOG_DEBUG,"new_route(): Chosen route length %u.",routelen);
-  
-    /* allocate memory for the new route */
-    route = (unsigned int *)malloc(routelen * sizeof(unsigned int));
-    if (!route)
-    {
-      log(LOG_ERR,"Memory allocation failed.");
-      return NULL;
-    }
- 
-    oldchoice = rarray_len;
-    for(i=0;i<routelen;i++)
-    {
-      log(LOG_DEBUG,"new_route() : Choosing hop %u.",i);
-      retval = RAND_pseudo_bytes((unsigned char *)&choice,sizeof(unsigned int));
-      if (retval == -1)
-      {
-	free((void *)route);
-	return NULL;
-      }
-
-      choice = choice % (rarray_len);
-      log(LOG_DEBUG,"new_route() : Chosen router %u.",choice);
-      if (choice == oldchoice) /* same router */
-      {
-	/* try again  */
-	i--;
-	continue;
-      }
-      oldchoice = choice;
-      route[i] = choice;
-    }
-   
-    *rlen = routelen;
-    return route;
-  } /* valid parameters */
-  else /* invalid parameters */
-    return NULL;
-}
-
-/* creates a new onion from route, stores it and its length into bufp and lenp respectively */
-unsigned char *create_onion(routent_t **rarray, size_t rarray_len, unsigned int *route, size_t routelen, size_t *lenp, crypt_path_t **cpathp)
-{
-  int i,j;
-  int retval = 0;
-  onion_layer_t *layer = NULL;
-  crypt_path_t *hop = NULL;
-  unsigned char *retbuf = NULL;
-  unsigned char *bufp;
-  routent_t *router;
-
-  if ( (rarray) && (route) && (lenp) ) /* valid parameters */
-  {
-    /* calculate the size of the onion */
-    *lenp = routelen * 28 + 100; /* 28 bytes per layer + 100 bytes padding for the innermost layer */
-    log(LOG_DEBUG,"create_onion() : Size of the onion is %u.",*lenp);
-    
-    /* allocate memory for the onion */
-    bufp = (unsigned char *)malloc(*lenp);
-    if (!bufp)
-    {
-      log(LOG_ERR,"Error allocating memory.");
-      return NULL;
-    }
-    log(LOG_DEBUG,"create_onion() : Allocated memory for the onion.");
-    
-    for (retval=0; retval<routelen;retval++)
-    {
-      log(LOG_DEBUG,"create_onion() : %u : %s:%u, %u/%u",routelen-retval,inet_ntoa(*((struct in_addr *)&((rarray[route[retval]])->addr))),ntohs((rarray[route[retval]])->port),(rarray[route[retval]])->pkey,RSA_size((rarray[route[retval]])->pkey));
-    }
-    
-    layer = (onion_layer_t *)(bufp + *lenp - 128); /* pointer to innermost layer */
-    /* create the onion layer by layer, starting with the innermost */
-    for (i=0;i<routelen;i++)
-    {
-      router = rarray[route[i]];
-      
-      log(LOG_DEBUG,"create_onion() : %u",router);
-      log(LOG_DEBUG,"create_onion() : This router is %s:%u",inet_ntoa(*((struct in_addr *)&router->addr)),ntohs(router->port));
-      log(LOG_DEBUG,"create_onion() : Key pointer = %u.",router->pkey);
-      log(LOG_DEBUG,"create_onion() : Key size = %u.",RSA_size(router->pkey)); 
-      
-      /* 0 bit */
-      layer->zero = 0;
-      /* version */
-      layer->version = VERSION;
-      /* Back F + Forw F both use DES OFB*/
-      layer->backf = ONION_DEFAULT_CIPHER;
-      layer->forwf = ONION_DEFAULT_CIPHER;
-      /* Dest Port */
-      if (i) /* not last hop */
-	layer->port = rarray[route[i-1]]->port;
-      else
-	layer->port = 0;
-      /* Dest Addr */
-      if (i) /* not last hop */
-	layer->addr = rarray[route[i-1]]->addr;
-      else
-	layer->addr = 0;
-      /* Expiration Time */
-      layer->expire = time(NULL) + 3600; /* NOW + 1 hour */
-      /* Key Seed Material */
-      retval = RAND_bytes(layer->keyseed,16);
-      if (retval < 1) /* error */
-      {
-	log(LOG_ERR,"Error generating random data.");
-	free((void *)bufp);
-	if (cpathp)
-	{
-	  for (j=0;j<i;j++)
-	    free((void *)cpathp[i]);
-	}
-	return NULL;
-      }
-      log(LOG_DEBUG,"create_onion() : Onion layer %u built : %u, %u, %u, %s, %u.",i+1,layer->zero,layer->backf,layer->forwf,inet_ntoa(*((struct in_addr *)&layer->addr)),ntohs(layer->port));
-      
-      /* build up the crypt_path */
-      if (cpathp)
-      {
-	cpathp[i] = (crypt_path_t *)malloc(sizeof(crypt_path_t));
-	if (!cpathp[i])
-	{
-	  log(LOG_ERR,"Error allocating memory.");
-	  free((void *)bufp);
-	  for (j=0;j<i;j++)
-	    free((void *)cpathp[i]);
-	}
-      
-	log(LOG_DEBUG,"create_onion() : Building hop %u of crypt path.",i+1);
-	hop = cpathp[i];
-	/* set crypto functions */
-	hop->backf = layer->backf;
-	hop->forwf = layer->forwf;
-	
-	/* calculate keys */
-	SHA1(layer->keyseed,16,hop->digest3);
-	log(LOG_DEBUG,"create_onion() : First SHA pass performed.");
-	SHA1(hop->digest3,20,hop->digest2);
-	log(LOG_DEBUG,"create_onion() : Second SHA pass performed.");
-	SHA1(hop->digest2,20,hop->digest3);
-	log(LOG_DEBUG,"create_onion() : Third SHA pass performed.");
-	log(LOG_DEBUG,"create_onion() : Keys generated.");
-	/* set IVs */
-	memset((void *)hop->f_iv,0,16);
-	memset((void *)hop->b_iv,0,16);
-	
-	/* initialize cipher contexts */
-	EVP_CIPHER_CTX_init(&hop->f_ctx);
-	EVP_CIPHER_CTX_init(&hop->b_ctx);
-	
-	/* initialize cipher engines */
-	switch(layer->forwf)
-	{
-	 case ONION_CIPHER_DES :
-	  retval = EVP_EncryptInit(&hop->f_ctx, EVP_des_ofb(), hop->digest3, hop->f_iv);
-	  break;
-	 case ONION_CIPHER_RC4 :
-	  retval = EVP_EncryptInit(&hop->f_ctx, EVP_rc4(), hop->digest3, hop->f_iv);
-	  break;
-	 case ONION_CIPHER_IDENTITY :
-	  retval = EVP_EncryptInit(&hop->f_ctx, EVP_enc_null(), hop->digest3, hop->f_iv);
-	  break;
-	}
-	if (!retval) /* cipher initialization failed */
-	{
-	  log(LOG_ERR,"Could not initialize crypto engines.");
-	  free((void *)bufp);
-	  for (j=0;j<i;j++)
-	    free((void *)cpathp[i]);
-	  return NULL;
-	}
-	switch(layer->backf)
-	{
-	 case ONION_CIPHER_DES :
-	  retval = EVP_DecryptInit(&hop->b_ctx, EVP_des_ofb(), hop->digest2, hop->b_iv);
-	  break;
-	 case ONION_CIPHER_RC4 :
-	  retval = EVP_DecryptInit(&hop->b_ctx, EVP_rc4(), hop->digest2, hop->b_iv);
-	  break;
-	 case ONION_CIPHER_IDENTITY :
-	  retval = EVP_DecryptInit(&hop->b_ctx, EVP_enc_null(), hop->digest2, hop->b_iv);
-	  break;
-	}
-	if (!retval) /* cipher initialization failed */
-	{
-	  log(LOG_ERR,"Could not initialize crypto engines.");
-	  free((void *)bufp);
-	  for (j=0;j<i;j++)
-	    free((void *)cpathp[i]);
-	  return NULL;
-	}
-	
-	log(LOG_DEBUG,"create_onion() : Built corresponding crypt path hop.");
-      }
-      
-      /* padding if this is the innermost layer */
-      if (!i)
-      {
-	retval=RAND_pseudo_bytes((unsigned char *)layer + 28,100);
-	if (retval == -1) /* error */
-	{
-	  log(LOG_ERR,"Error generating pseudo-random data.");
-	  free((void *)bufp);
-	  if (cpathp)
-	  {
-	    for (j=0;j<i;j++)
-	      free((void *)cpathp[i]);
-	  }
-	  return NULL;
-	}
-	log(LOG_DEBUG,"create_onion() : This is the innermost layer. Adding 100 bytes of padding.");
-      }
-      
-      /* encrypt */
-      retbuf = encrypt_onion(layer,128+(i*28),router->pkey);
-      if (!retbuf)
-      {
-	log(LOG_ERR,"Error encrypting onion layer.");
-	free((void *)bufp);
-	if (cpathp)
-	{
-	  for (j=0;j<i;j++)
-	    free((void *)cpathp[i]);
-	}
-	return NULL;
-      }
-      log(LOG_DEBUG,"create_onion() : Encrypted layer.");
-      
-      /* calculate pointer to next layer */
-      layer = (onion_layer_t *)bufp + (routelen-i-2)*sizeof(onion_layer_t);
-    }
-
-    return bufp;
-  } /* valid parameters */
-  else
-    return NULL;
-}
-
-/* encrypts 128 bytes of the onion with the specified public key, the rest with 
- * DES OFB with the key as defined in the outter layer */
-unsigned char *encrypt_onion(onion_layer_t *onion, uint32_t onionlen, RSA *pkey)
-{
-  unsigned char *tmpbuf = NULL; /* temporary buffer for crypto operations */
-  unsigned char digest[20]; /* stores SHA1 output - 160 bits */
-  unsigned char *retbuf = NULL;
-  unsigned char iv[8];
-  int retval = 0;
-  int outlen = 0;
-  
-  EVP_CIPHER_CTX ctx; /* cipher context */
- 
-  if ( (onion) && (pkey) ) /* valid parameters */
-  {
-    memset((void *)iv,0,8);
-    
-    log(LOG_DEBUG,"Onion layer : %u, %u, %u, %s, %u.",onion->zero,onion->backf,onion->forwf,inet_ntoa(*((struct in_addr *)&onion->addr)),ntohs(onion->port));
-    /* allocate space for tmpbuf */
-    tmpbuf = (unsigned char *)malloc(onionlen);
-    if (!tmpbuf)
-    {
-      log(LOG_ERR,"Could not allocate memory.");
-      return NULL;
-    }
-    log(LOG_DEBUG,"encrypt_onion() : allocated %u bytes of memory for the encrypted onion (at %u).",onionlen,tmpbuf);
-  
-    /* get key1 = SHA1(KeySeed) */
-    retbuf = SHA1(((onion_layer_t *)onion)->keyseed,16,digest);
-    if (!retbuf)
-    {
-      log(LOG_ERR,"Error computing SHA1 digest.");
-      free((void *)tmpbuf);
-      return NULL;
-    }
-    log(LOG_DEBUG,"encrypt_onion() : Computed DES key.");
-    
-    log(LOG_DEBUG,"encrypt_onion() : Trying to RSA encrypt.");
-    /* encrypt 128 bytes with RSA *pkey */
-    retval = RSA_public_encrypt(128, (unsigned char *)onion, tmpbuf, pkey, RSA_NO_PADDING); 
-    if (retval == -1) 
-    { 
-      log(LOG_ERR,"Error RSA-encrypting data :%s",ERR_reason_error_string(ERR_get_error())); 
-      free((void *)tmpbuf); 
-      return NULL; 
-    }
-  
-    log(LOG_DEBUG,"encrypt_onion() : RSA encrypted first 128 bytes of the onion."); 
-    
-    /* now encrypt the rest with DES OFB */
-    
-    EVP_CIPHER_CTX_init(&ctx); 
-    retval = EVP_EncryptInit(&ctx,EVP_des_ofb(),digest,iv);
-    if (!retval) /* error */ 
-    { 
-      log(LOG_ERR,"Error initializing DES engine:%s",ERR_reason_error_string(ERR_get_error())); 
-      free((void *)tmpbuf); 
-      return NULL; 
-    } 
-    
-    retval = EVP_EncryptUpdate(&ctx,(unsigned char *)tmpbuf+128,&outlen,(unsigned char *)onion+128,onionlen-128);
-    if (!retval) /* error */
-    { 
-      log(LOG_ERR,"Error performing DES encryption:%s",ERR_reason_error_string(ERR_get_error())); 
-      free((void *)tmpbuf); 
-      return NULL; 
-    }
-    log(LOG_DEBUG,"encrypt_onion() : DES OFB encrypted the rest of the onion.");
-  
-    EVP_CIPHER_CTX_cleanup(&ctx);
-  
-    /* now copy tmpbuf to onion */
-    memcpy((void *)onion,(void *)tmpbuf,onionlen);
-    log(LOG_DEBUG,"encrypt_onion() : Copied cipher to original onion buffer.");
-    free((void *)tmpbuf);
-    return (unsigned char *)onion;
-  } /* valid parameters */
-  else
-    return NULL;
-}
-
-/* decrypts the first 128 bytes using RSA and prkey, decrypts the rest with DES OFB with key1 */
-unsigned char *decrypt_onion(onion_layer_t *onion, uint32_t onionlen, RSA *prkey)
-{
-  void *tmpbuf = NULL; /* temporary buffer for crypto operations */
-  unsigned char digest[20]; /* stores SHA1 output - 160 bits */
-  unsigned char *retbuf = NULL;
-  unsigned char iv[8];
-  int retval = 0;
-  int outlen = 0;
-  
-  EVP_CIPHER_CTX ctx; /* cipher context */
-  
-  if ( (onion) && (prkey) ) /* valid parameters */
-  {
-    memset((void *)iv,0,8);
-    
-    /* allocate space for tmpbuf */
-    tmpbuf = malloc(onionlen);
-    if (!tmpbuf)
-    {
-      log(LOG_ERR,"Could not allocate memory.");
-      return NULL;
-    }
-    log(LOG_DEBUG,"decrypt_onion() : Allocated memory for the temporary buffer.");
-
-    /* decrypt 128 bytes with RSA *prkey */
-    retval = RSA_private_decrypt(128, (unsigned char*)onion, (unsigned char *)tmpbuf, prkey, RSA_NO_PADDING);
-    if (retval == -1)
-    {
-      log(LOG_ERR,"Error RSA-decrypting data :%s",ERR_reason_error_string(ERR_get_error()));
-      free((void *)tmpbuf);
-      return NULL;
-    }
-    log(LOG_DEBUG,"decrypt_onion() : RSA decryption complete.");
-    
-    /* get key1 = SHA1(KeySeed) */
-    retbuf = SHA1(((onion_layer_t *)tmpbuf)->keyseed,16,digest);
-    if (!retbuf)
-    {
-      log(LOG_ERR,"Error computing SHA1 digest.");
-      free((void *)tmpbuf);
-      return NULL;
-    }
-    log(LOG_DEBUG,"decrypt_onion() : Computed DES key.");
-    
-    /* now decrypt the rest with DES OFB */
-    EVP_CIPHER_CTX_init(&ctx);
-    retval = EVP_DecryptInit(&ctx,EVP_des_ofb(),digest,iv);
-    if (!retval) /* error */
-    {
-      log(LOG_ERR,"Error initializing DES engine:%s",ERR_reason_error_string(ERR_get_error()));
-      free((void *)tmpbuf);
-      return NULL;
-    }
-    retval = EVP_DecryptUpdate(&ctx,(unsigned char *)tmpbuf+128,&outlen,(unsigned char *)onion+128,onionlen-128);
-    if (!retval) /* error */
-    {
-      log(LOG_ERR,"Error performing DES decryption:%s",ERR_reason_error_string(ERR_get_error()));
-      free((void *)tmpbuf);
-      return NULL;
-    }
-    
-    EVP_CIPHER_CTX_cleanup(&ctx);
-    log(LOG_DEBUG,"decrypt_onion() : DES decryption complete.");
-    
-    /* now copy tmpbuf to onion */
-    memcpy((void *)onion,(void *)tmpbuf,onionlen);
-    free((void *)tmpbuf);
-    return (unsigned char *)onion;
-  } /* valid parameters */
-  else
-    return NULL;
-}
-
-/* delete first n bytes of the onion and pads the end with n bytes of random data */
-void pad_onion(unsigned char *onion, uint32_t onionlen, size_t n)
-{
-  if (onion) /* valid parameter */
-  {
-    memmove((void *)onion,(void *)(onion+n),onionlen-n);
-    RAND_pseudo_bytes(onion+onionlen-n,n);
-  }
-}
-
-/* create a new tracked_onion entry */
-tracked_onion_t *new_tracked_onion(unsigned char *onion, uint32_t onionlen, tracked_onion_t **tracked_onions, tracked_onion_t **last_tracked_onion)
-{
-  tracked_onion_t *to = NULL;
-  
-  if (!onion || !tracked_onions || !last_tracked_onion) /* invalid parameters */
-    return NULL;
-  
-  to = (tracked_onion_t *)malloc(sizeof(tracked_onion_t));
-  if (!to)
-    return NULL;
-  
-  to->expire = ((onion_layer_t *)onion)->expire; /* set the expiration date */
-  /* compute the SHA digest */
-  SHA1(onion, onionlen, to->digest);
-  if (!to->digest)
-  {
-    log(LOG_DEBUG,"new_tracked_onion() : Failed to compute a SHA1 digest of the onion.");
-    free((void *)to);
-    return NULL;
-  }
-  
-  to->next = NULL;
-  
-  if (!*tracked_onions)
-  {
-    to->prev = NULL;
-    *tracked_onions = to;
-  }
-  else
-  {
-    to->prev = (void *)*last_tracked_onion;
-    (*last_tracked_onion)->next = (void *)to;
-  }
-  *last_tracked_onion = to;
-  
-  return to;
-}
-
-/* delete a tracked onion entry */
-void remove_tracked_onion(tracked_onion_t *to, tracked_onion_t **tracked_onions, tracked_onion_t **last_tracked_onion)
-{
-  if (!*tracked_onions || !*last_tracked_onion || !to)
-    return;
-  
-  if (to->prev)
-    ((tracked_onion_t *)to->prev)->next = to->next;
-  if (to->next)
-    ((tracked_onion_t *)to->next)->prev = to->prev;
-  
-  if (to == *tracked_onions)
-    *tracked_onions = (tracked_onion_t *)to->next;
-  
-  if (to == *last_tracked_onion)
-    *last_tracked_onion = (tracked_onion_t *)to->prev;
-  
-  free((void *)to);
-  
-  return;
-}
-
-/* find a tracked onion in the linked list of tracked onions */
-tracked_onion_t *id_tracked_onion(unsigned char *onion, uint32_t onionlen, tracked_onion_t *tracked_onions)
-{
-  tracked_onion_t *to = tracked_onions;
-  unsigned char digest[20];
-  
-  /* compute the SHA digest of the onion */
-  SHA1(onion,onionlen, digest);
-  
-  while(to)
-  {
-    if (!memcmp((void *)digest, (void *)to->digest, 20))
-      return to;
-    to = (tracked_onion_t *)to->next;
-  }
-  
-  return NULL;
-}
-
diff --git a/src/common/onion.h b/src/common/onion.h
deleted file mode 100644
index 41e6d286c..000000000
--- a/src/common/onion.h
+++ /dev/null
@@ -1,156 +0,0 @@
-/**
- * onion.h 
- * Routines for creating/manipulating onions.
- *
- * Matej Pfajfar <mp292@cam.ac.uk>
- */
-
-/*
- * Changes :
- * $Log$
- * Revision 1.1  2002/06/26 22:45:50  arma
- * Initial revision
- *
- * Revision 1.17  2002/04/02 14:27:11  badbytes
- * Final finishes.
- *
- * Revision 1.16  2002/03/25 09:11:23  badbytes
- * Added a list of onions being tracked for replay attacks.
- *
- * Revision 1.15  2002/01/26 19:24:29  mp292
- * Reviewed according to Secure-Programs-HOWTO.
- *
- * Revision 1.14  2002/01/18 20:40:40  mp292
- * Fixed a bug in en/decrypt_onion() functions.
- *
- * Revision 1.13  2002/01/17 23:48:31  mp292
- * Added some extra debugging messages to fix a bug in encrypt_onion() which
- * seems to corrupt the routent *route list.
- *
- * Revision 1.12  2002/01/11 15:47:17  badbytes
- * *** empty log message ***
- *
- * Revision 1.11  2002/01/09 07:55:23  badbytes
- * Ciphers got out of sync. Hopefully fixed.
- *
- * Revision 1.10  2002/01/04 13:48:54  badbytes
- * Changed unsigned short/long to uint16_t and uint32_t respectively.
- *
- * Revision 1.9  2001/12/19 08:29:00  badbytes
- * Macro DEFAULT_CIPHER now holds the default crypto algorithm
- *
- * Revision 1.8  2001/12/18 10:37:47  badbytes
- * Header files now only apply if they were not previously included from somewhere else.
- *
- * Revision 1.7  2001/12/18 07:26:47  badbytes
- * Added a new definition of onion_layer_t, depending on the byte order.
- *
- * Revision 1.6  2001/12/17 13:35:17  badbytes
- * Still writing handle_connection()
- *
- * Revision 1.5  2001/12/14 14:44:37  badbytes
- * chooselen() tested
- *
- * Revision 1.4  2001/12/14 13:31:08  badbytes
- * peel_onion() was redundant, removed it
- *
- * Revision 1.3  2001/12/14 13:14:03  badbytes
- * Split types.h into routent.h and ss.h. Keeping them all in one file created unnecesary dependencies.
- *
- * Revision 1.2  2001/12/14 12:44:47  badbytes
- * Minor modifications to reflect new paths ...
- *
- * Revision 1.1  2001/12/14 12:41:12  badbytes
- * Moved from op/ as it will be reused by other modules.
- *
- * Revision 1.1  2001/12/13 15:15:10  badbytes
- * Started coding the onion proxy.
- *
- */
-
-#ifndef __ONION_H
-
-#include <endian.h>
-#include <stdint.h>
-
-#include <openssl/rsa.h>
-#include <openssl/evp.h>
-
-#include "routent.h"
-#include "version.h"
-
-/* available cipher functions */
-#define ONION_CIPHER_IDENTITY 0
-#define ONION_CIPHER_DES 1
-#define ONION_CIPHER_RC4 2
-
-/* default cipher function */
-#define ONION_DEFAULT_CIPHER ONION_CIPHER_DES
-
-typedef struct
-{
-  int zero:1;
-  int version:7;
-  int backf:4;
-  int forwf:4;
-  uint16_t port;
-  uint32_t addr;
-  time_t expire;
-  unsigned char keyseed[16];
-} onion_layer_t;
-
-typedef struct
-{
-  unsigned int forwf;
-  unsigned int backf;
-  char digest2[20]; /* second SHA output for onion_layer_t.keyseed */
-  char digest3[20]; /* third SHA output for onion_layer_t.keyseed */
-  
-  /* IVs */
-  char f_iv[16];
-  char b_iv[16];
-  
-  /* cipher contexts */
-  EVP_CIPHER_CTX f_ctx;
-  EVP_CIPHER_CTX b_ctx;
-  
-} crypt_path_t;
-
-typedef struct
-{
-  time_t expire;
-  char digest[20]; /* SHA digest of the onion */
-  void *prev;
-  void *next;
-} tracked_onion_t;
-
-/* returns an array of indexes into a router array that define a new route through the OR network
- * int cw is the coin weight to use when choosing the route 
- * order of routers is from last to first */
-unsigned int *new_route(double cw, routent_t **rarray, size_t rarray_len, size_t *rlen);
-
-/* creates a new onion from route, stores it and its length into bufp and lenp respectively */
-/* if cpathp not NULL then also compute the corresponding crypt_path */ 
-unsigned char *create_onion(routent_t **rarray, size_t rarray_len, unsigned int *route, size_t routelen, size_t *lenp, crypt_path_t **cpathp);
-
-/* encrypts 128 bytes of the onion with the specified public key, the rest with 
- * DES OFB with the key as defined in the outter layer */
-unsigned char *encrypt_onion(onion_layer_t *onion, uint32_t onionlen, RSA *pkey);
-
-/* decrypts the onion */
-unsigned char *decrypt_onion(onion_layer_t *onion, uint32_t onionlen, RSA *prkey);
-
-/* deletes the first n bytes of the onion and pads the end with n bytes of random data */
-void pad_onion(unsigned char *onion, uint32_t onionlen, size_t n);
-
-/* create a new tracked_onion entry */
-tracked_onion_t *new_tracked_onion(unsigned char *onion, uint32_t onionlen, tracked_onion_t **tracked_onions, tracked_onion_t **last_tracked_onion);
-
-/* delete a tracked onion entry */
-void remove_tracked_onion(tracked_onion_t *to, tracked_onion_t **tracked_onions, tracked_onion_t **last_tracked_onion);
-
-/* find a tracked onion in the linked list of tracked onions */
-tracked_onion_t *id_tracked_onion(unsigned char *onion, uint32_t onionlen, tracked_onion_t *tracked_onions);
-
-#define __ONION_H
-#endif