text: /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
  /* lib/crypto/openssl/hash_provider/hash_sha1.c */
  /*
   * 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.
   */
  
  #include "crypto_int.h"
  #include <openssl/evp.h>
  #include <openssl/sha.h>
  
  static krb5_error_code
  k5_sha1_hash(const krb5_crypto_iov *data, size_t num_data, krb5_data *output)
  {
      EVP_MD_CTX ctx;
      unsigned int i;
  
      if (output->length != SHA_DIGEST_LENGTH)
          return KRB5_CRYPTO_INTERNAL;
  
      EVP_MD_CTX_init(&ctx);
      EVP_DigestInit_ex(&ctx, EVP_sha1(), NULL);
      for (i = 0; i < num_data; i++) {
          const krb5_data *d = &data[i].data;
          if (SIGN_IOV(&data[i]))
              EVP_DigestUpdate(&ctx, (unsigned char *)d->data, d->length);
      }
      EVP_DigestFinal_ex(&ctx, (unsigned char *)output->data, NULL);
      EVP_MD_CTX_cleanup(&ctx);
      return 0;
  }
  
  const struct krb5_hash_provider krb5int_hash_sha1 = {
      "SHA1",
      SHA_DIGEST_LENGTH,
      64,
      k5_sha1_hash
  };
  