text: /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  
  /*
    * Copyright2001 by the Massachusetts Institute of Technology.
   * Copyright 1993 by OpenVision Technologies, Inc.
   * 
   * Permission to use, copy, modify, distribute, and sell this software
   * and its documentation for any purpose is hereby granted without fee,
   * provided that the above copyright notice appears in all copies and
   * that both that copyright notice and this permission notice appear in
   * supporting documentation, and that the name of OpenVision not be used
   * in advertising or publicity pertaining to distribution of the software
   * without specific, written prior permission. OpenVision makes no
   * representations about the suitability of this software for any
   * purpose.  It is provided "as is" without express or implied warranty.
   * 
   * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
   * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
   * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
   * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
   * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
   * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
   * PERFORMANCE OF THIS SOFTWARE.
   */
  
  /*
   * Copyright (C) 1998 by the FundsXpress, INC.
   * 
   * All rights reserved.
   * 
   * Export of this software from the United States of America may require
   * a specific license from the United States Government.  It is the
   * responsibility of any person or organization contemplating export to
   * obtain such a license before exporting.
   * 
   * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
   * distribute this software and its documentation for any purpose and
   * without fee is hereby granted, provided that the above copyright
   * notice appear in all copies and that both that copyright notice and
   * this permission notice appear in supporting documentation, and that
   * the name of FundsXpress. not be used in advertising or publicity pertaining
   * to distribution of the software without specific, written prior
   * permission.  FundsXpress makes no representations about the suitability of
   * this software for any purpose.  It is provided "as is" without express
   * or implied warranty.
   * 
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   */
  
  /* Solaris Kerberos:  order is important here.  include gssapiP_krb5.h
   * before all others, otherwise we get a LINT error from MALLOC macro
   * being redefined in mechglueP.h */
  #include <gssapiP_krb5.h>
  #include <k5-int.h>
  
  /* Solaris Kerberos defines memory management macros in <krb5.h> */
  /* #include <memory.h> */
  
  /*
   * $Id: util_crypt.c,v 1.11.6.3 2000/06/03 06:09:45 tlyu Exp $
   */
  
  int
  kg_confounder_size(context, key)
       krb5_context context;
       krb5_keyblock *key;
  {
     krb5_error_code code;
     size_t blocksize;
     /* We special case rc4*/
     if (key->enctype == ENCTYPE_ARCFOUR_HMAC)
       return 8;
     code = krb5_c_block_size(context, key->enctype, &blocksize);
     if (code)
        return(-1); /* XXX */
  
     return(blocksize);
  }
  
  krb5_error_code
  kg_make_confounder(context, key, buf)
       krb5_context context;
       krb5_keyblock *key;
       unsigned char *buf;
  {
     krb5_error_code code;
     size_t blocksize;
     krb5_data lrandom;
  
     code = krb5_c_block_size(context, key->enctype, &blocksize);
     if (code)
         return(code);
  
     lrandom.length = blocksize;
     lrandom.data = (char *) buf;
  
     return(krb5_c_random_make_octets(context, &lrandom));
  }
  
  int
  kg_encrypt_size(context, key, n)
       krb5_context context;
       krb5_keyblock *key;
       int n;
  {
     size_t enclen;
  
     if (krb5_c_encrypt_length(context, key->enctype, n, &enclen) != 0)
        return(-1); /* XXX */
  
     return(enclen);
  }
  
  krb5_error_code
  kg_encrypt(context, key, usage, iv, in, out, length)
       krb5_context context;
       krb5_keyblock *key;
       int usage;
       krb5_pointer iv;
       krb5_const_pointer in;
       krb5_pointer out;
       unsigned int length;
  {
     krb5_error_code code;
     size_t blocksize;
     krb5_data ivd, *pivd, inputd;
     krb5_enc_data outputd;
  
     KRB5_LOG0(KRB5_INFO, "kg_encrypt() start.");
  
     if (iv) {
         code = krb5_c_block_size(context, key->enctype, &blocksize);
         if (code)
  	   return(code);
  
         ivd.length = blocksize;
         ivd.data = MALLOC(ivd.length);
         if (ivd.data == NULL)
  	   return ENOMEM;
         (void) memcpy(ivd.data, iv, ivd.length);
         pivd = &ivd;
     } else {
         pivd = NULL;
     }
  
     inputd.length = length;
     inputd.data = (char *)in; /* Solaris Kerberos */
  
     outputd.ciphertext.length = length;
     outputd.ciphertext.data = out;
  
     code = krb5_c_encrypt(context, key, usage, pivd, &inputd, &outputd);
     if (pivd != NULL)
         krb5_free_data_contents(context, pivd);
  
     KRB5_LOG(KRB5_INFO, "kg_encrypt() end. code = %d", code);
     return code;
  }
  
  /* length is the length of the cleartext. */
  
  krb5_error_code
  kg_decrypt(context, key, usage, iv, in, out, length)
       krb5_context context;
       krb5_keyblock *key;
       int usage;
       krb5_pointer iv;
       krb5_const_pointer in;
       krb5_pointer out;
       unsigned int length;
  {
     krb5_error_code code;
     size_t blocksize;
     krb5_data ivd, *pivd, outputd;
     krb5_enc_data inputd;
     KRB5_LOG0(KRB5_INFO, "kg_decrypt() start.");
  
     if (iv) {
         code = krb5_c_block_size(context, key->enctype, &blocksize);
         if (code)
  	   return(code);
  
         ivd.length = blocksize;
         ivd.data = MALLOC(ivd.length);
         if (ivd.data == NULL)
  	   return ENOMEM;
         (void) memcpy(ivd.data, iv, ivd.length);
         pivd = &ivd;
     } else {
         pivd = NULL;
     }
  
     inputd.enctype = ENCTYPE_UNKNOWN;
     inputd.ciphertext.length = length;
     inputd.ciphertext.data = (char *)in; /* Solaris Kerberos */
  
     outputd.length = length;
     outputd.data = out;
  
     code = krb5_c_decrypt(context, key, usage, pivd, &inputd, &outputd);
     if (pivd != NULL)
         krb5_free_data_contents(context, pivd);
  
     KRB5_LOG(KRB5_INFO, "kg_decrypt() end. code = %d", code);
     return code;
  }
  
  krb5_error_code
  kg_arcfour_docrypt (krb5_context context,
  		const krb5_keyblock *longterm_key , int ms_usage,
  		const unsigned char *kd_data, size_t kd_data_len,
  		const unsigned char *input_buf, size_t input_len,
  		unsigned char *output_buf)
  {
    krb5_error_code code;
    krb5_data input, output;
    krb5_keyblock seq_enc_key, usage_key;
    unsigned char t[4];
  
    KRB5_LOG0(KRB5_INFO, "kg_arcfour_docrypt() start");
  
    bzero(&usage_key, sizeof(krb5_keyblock));
    bzero(&seq_enc_key, sizeof(krb5_keyblock));
  
    usage_key.length = longterm_key->length;
    usage_key.contents = MALLOC(usage_key.length);
    usage_key.enctype = longterm_key->enctype;
    usage_key.dk_list = NULL;
  #ifdef _KERNEL
  
    usage_key.kef_mt  = longterm_key->kef_mt;
    code = init_key_kef(longterm_key->kef_mt, &usage_key);
    if (code)
  	return (code);
  #endif /* _KERNEL */
    if (usage_key.contents == NULL)
      return (ENOMEM);
    seq_enc_key.length = longterm_key->length;
    seq_enc_key.contents = MALLOC(seq_enc_key.length);
    seq_enc_key.enctype = longterm_key->enctype;
    seq_enc_key.dk_list = NULL;
  #ifdef _KERNEL
    seq_enc_key.kef_mt  = longterm_key->kef_mt;
    code = init_key_kef(longterm_key->kef_mt, &seq_enc_key);
    if (code)
  	return (code);
  #endif /* _KERNEL */
    if (seq_enc_key.contents == NULL) {
      FREE ((void *) usage_key.contents, usage_key.length);
      return (ENOMEM);
    }
  
    t[0] = ms_usage &0xff;
    t[1] = (ms_usage>>8) & 0xff;
    t[2] = (ms_usage>>16) & 0xff;
    t[3] = (ms_usage>>24) & 0xff;
    input.data = (void *) &t;
    input.length = 4;
    output.data = (void *) usage_key.contents;
    output.length = usage_key.length;
  #ifdef _KERNEL
    code = krb5_hmac(context, longterm_key, &input, &output);
  #else
    code = krb5_hmac(context, &krb5int_hash_md5,
  		longterm_key, 1, &input, &output);
  #endif /* _KERNEL */
    if (code)
      goto cleanup_arcfour;
  	  
    input.data = ( void *) kd_data;
    input.length = kd_data_len;
    output.data = (void *) seq_enc_key.contents;
  #ifdef _KERNEL
    code = krb5_hmac(context, &usage_key, &input, &output);
  #else
    code = krb5_hmac(context, &krb5int_hash_md5,
  		&usage_key, 1, &input, &output);
  #endif /* _KERNEL */
  
    if (code)
      goto cleanup_arcfour;
    input.data = ( void * ) input_buf;
    input.length = input_len;
    output.data = (void * ) output_buf;
    output.length = input_len;
  
    /*
     * Call the arcfour encryption method directly here, we cannot
     * use the standard "krb5_c_encrypt" interface because we just
     * want the arcfour algorithm applied and not the additional MD5-HMAC
     * which are applied when using the standard interface.
     */
    code = krb5int_enc_arcfour.encrypt(context, &seq_enc_key, 0, &input, &output);
  
   cleanup_arcfour:
    bzero ((void *) seq_enc_key.contents, seq_enc_key.length);
    bzero ((void *) usage_key.contents, usage_key.length);
    FREE ((void *) usage_key.contents, usage_key.length);
    FREE ((void *) seq_enc_key.contents, seq_enc_key.length);
  
    KRB5_LOG(KRB5_INFO, "kg_arcfour_docrypt() end code = %d", code);
    return (code);
  }
  		    
  