text: /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
  /* plugins/preauth/pkinit/pkinit_kdf_test.c */
  /*
   * Copyright (C) 2011 by the Massachusetts Institute of Technology.
   * 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 M.I.T. not be used in advertising or publicity pertaining
   * to distribution of the software without specific, written prior
   * permission.  Furthermore if you modify this software you must label
   * your software as modified software and not distribute it in such a
   * fashion that it might be confused with the original M.I.T. software.
   * M.I.T. makes no representations about the suitability of
   * this software for any purpose.  It is provided "as is" without express
   * or implied warranty.
   */
  
  /*
   * pkinit_kdf_test.c -- Test to verify the correctness of the function
   * pkinit_alg_agility_kdf() in pkinit_crypto_openssl, which implements
   * the Key Derivation Function from the PKInit Algorithm Agility
   * document, currently draft-ietf-krb-wg-pkinit-alg-agility-04.txt.
   */
  
  #include "k5-platform.h"
  #include "pkinit.h"
  
  /**
   * Initialize a krb5_data from @a s, a constant string. Note @a s is evaluated
   * multiple times; this is acceptable for constants.
   */
  #define DATA_FROM_STRING(s)                     \
      {0, sizeof(s)-1, (char *) s}
  
  
  /* values from test vectors in the pkinit-alg-agility draft */
  int secret_len = 256;
  char twenty_as[10];
  char eighteen_bs[9];
  char party_u_name[] = "lha@SU.SE";
  char party_v_name[] = "krbtgt/SU.SE@SU.SE";
  int enctype_aes = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
  const krb5_data lha_data = DATA_FROM_STRING("lha");
  
  krb5_octet key1_hex[] =
  {0xe6, 0xAB, 0x38, 0xC9, 0x41, 0x3E, 0x03, 0x5B,
   0xB0, 0x79, 0x20, 0x1E, 0xD0, 0xB6, 0xB7, 0x3D,
   0x8D, 0x49, 0xA8, 0x14, 0xA7, 0x37, 0xC0, 0x4E,
   0xE6, 0x64, 0x96, 0x14, 0x20, 0x6F, 0x73, 0xAD};
  
  krb5_octet key2_hex[] =
  {0x77, 0xEF, 0x4E, 0x48, 0xC4, 0x20, 0xAE, 0x3F,
   0xEC, 0x75, 0x10, 0x9D, 0x79, 0x81, 0x69, 0x7E,
   0xED, 0x5D, 0x29, 0x5C, 0x90, 0xc6, 0x25, 0x64,
   0xF7, 0xBF, 0xD1, 0x01, 0xFA, 0x9b, 0xC1, 0xD5};
  
  krb5_octet key3_hex[] =
  {0xD3, 0xC7, 0x8A, 0x79, 0xD6, 0x52, 0x13, 0xEF,
   0xE9, 0xA8, 0x26, 0xF7, 0x5D, 0xFB, 0x01, 0xF7,
   0x23, 0x62, 0xFB, 0x16, 0xFB, 0x01, 0xDA, 0xD6};
  
  int
  main(int argc, char **argv)
  {
      /* arguments for calls to pkinit_alg_agility_kdf() */
      krb5_context context = 0;
      krb5_data secret;
      krb5_algorithm_identifier alg_id;
      krb5_data as_req;
      krb5_data pk_as_rep;
      krb5_keyblock key_block;
  
      /* other local variables */
      int retval = 0;
      krb5_enctype enctype = 0;
      krb5_principal u_principal = NULL;
      krb5_principal v_principal = NULL;
  
      /* initialize variables that get malloc'ed, so cleanup is safe */
      krb5_init_context (&context);
      memset(&alg_id, 0, sizeof(alg_id));
      memset(&as_req, 0, sizeof(as_req));
      memset(&pk_as_rep, 0, sizeof(pk_as_rep));
      memset(&key_block, 0, sizeof(key_block));
  
      /* set up a 256-byte, ALL-ZEROS secret */
      if (NULL == (secret.data = malloc(secret_len))) {
          printf("ERROR in pkinit_kdf_test: Memory allocation failed.");
          retval = ENOMEM;
          goto cleanup;
      }
      secret.length = secret_len;
      memset(secret.data, 0, secret_len);
  
      /* set-up the partyUInfo and partyVInfo principals */
      if ((0 != (retval = krb5_parse_name(context, party_u_name,
                                          &u_principal))) ||
          (0 != (retval = krb5_parse_name(context, party_v_name,
                                          &v_principal)))) {
          printf("ERROR in pkinit_kdf_test: Error parsing names, retval = %d",
                 retval);
          goto cleanup;
      }
  
      /* set-up the as_req and and pk_as_rep data */
      memset(twenty_as, 0xaa, sizeof(twenty_as));
      memset(eighteen_bs, 0xbb, sizeof(eighteen_bs));
      as_req.length = sizeof(twenty_as);
      as_req.data = twenty_as;
  
      pk_as_rep.length = sizeof(eighteen_bs);
      pk_as_rep.data = eighteen_bs;
  
      /* TEST 1:  SHA-1/AES */
      /* set up algorithm id */
      alg_id.algorithm.data = (char *)krb5_pkinit_sha1_oid;
      alg_id.algorithm.length = krb5_pkinit_sha1_oid_len;
  
      enctype = enctype_aes;
  
      /* call pkinit_alg_agility_kdf() with test vector values*/
      if (0 != (retval = pkinit_alg_agility_kdf(context, &secret,
                                                &alg_id.algorithm,
                                                u_principal, v_principal,
                                                enctype, &as_req, &pk_as_rep,
                                                &key_block))) {
          printf("ERROR in pkinit_kdf_test: kdf call failed, retval = %d",
                 retval);
          goto cleanup;
      }
  
      /* compare key to expected key value */
  
      if ((key_block.length == sizeof(key1_hex)) &&
          (0 == memcmp(key_block.contents, key1_hex, key_block.length))) {
          printf("SUCCESS: TEST 1 (SHA-1/AES), Correct key value generated.\n");
          retval = 0;
          /* free the keyblock contents, so we can use it for the next test */
          krb5_free_keyblock_contents(context, &key_block);
      } else {
          printf("FAILURE: TEST 1 (SHA-1/AES), Incorrect key value generated!\n");
          retval = 1;
          goto cleanup;
      }
  
      /* TEST 2: SHA-256/AES */
      /* set up algorithm id */
      alg_id.algorithm.data = (char *)krb5_pkinit_sha256_oid;
      alg_id.algorithm.length = krb5_pkinit_sha256_oid_len;
  
      enctype = enctype_aes;
  
      /* call pkinit_alg_agility_kdf() with test vector values*/
      if (0 != (retval = pkinit_alg_agility_kdf(context, &secret,
                                                &alg_id.algorithm,
                                                u_principal, v_principal,
                                                enctype, &as_req, &pk_as_rep,
                                                &key_block))) {
          printf("ERROR in pkinit_kdf_test: kdf call failed, retval = %d",
                 retval);
          goto cleanup;
      }
  
      /* compare key to expected key value */
  
      if ((key_block.length == sizeof(key2_hex)) &&
          (0 == memcmp(key_block.contents, key2_hex, key_block.length))) {
          printf("SUCCESS: TEST 2 (SHA-256/AES), Correct key value generated.\n");
          retval = 0;
          /* free the keyblock contents, so we can use it for the next test */
          krb5_free_keyblock_contents(context, &key_block);
      } else {
          printf("FAILURE: TEST 2 (SHA-256/AES), Incorrect key value generated!\n");
          retval = 1;
          goto cleanup;
      }
  
  cleanup:
      /* release all allocated resources, whether good or bad return */
      free(secret.data);
      krb5_free_principal(context, u_principal);
      krb5_free_principal(context, v_principal);
      krb5_free_keyblock_contents(context, &key_block);
      exit(retval);
  }
  