text: /* asn1t.h */
  /*
   * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   * 2006.
   */
  /* ====================================================================
   * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. 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.
   *
   * 3. All advertising materials mentioning features or use of this
   *    software must display the following acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
   *
   * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission. For written permission, please contact
   *    licensing@OpenSSL.org.
   *
   * 5. Products derived from this software may not be called "OpenSSL"
   *    nor may "OpenSSL" appear in their names without prior written
   *    permission of the OpenSSL Project.
   *
   * 6. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
   *
   * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   * EXPRESSED 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 OpenSSL PROJECT OR
   * ITS 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.
   * ====================================================================
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com).
   *
   */
  
  /* Internal ASN1 structures and functions: not for application use */
  
  int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d);
  int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d);
  
  /* ASN1 print context structure */
  
  struct asn1_pctx_st {
      unsigned long flags;
      unsigned long nm_flags;
      unsigned long cert_flags;
      unsigned long oid_flags;
      unsigned long str_flags;
  } /* ASN1_PCTX */ ;
  
  /* ASN1 public key method structure */
  
  struct evp_pkey_asn1_method_st {
      int pkey_id;
      int pkey_base_id;
      unsigned long pkey_flags;
      char *pem_str;
      char *info;
      int (*pub_decode) (EVP_PKEY *pk, X509_PUBKEY *pub);
      int (*pub_encode) (X509_PUBKEY *pub, const EVP_PKEY *pk);
      int (*pub_cmp) (const EVP_PKEY *a, const EVP_PKEY *b);
      int (*pub_print) (BIO *out, const EVP_PKEY *pkey, int indent,
                        ASN1_PCTX *pctx);
      int (*priv_decode) (EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf);
      int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk);
      int (*priv_print) (BIO *out, const EVP_PKEY *pkey, int indent,
                         ASN1_PCTX *pctx);
      int (*pkey_size) (const EVP_PKEY *pk);
      int (*pkey_bits) (const EVP_PKEY *pk);
      int (*param_decode) (EVP_PKEY *pkey,
                           const unsigned char **pder, int derlen);
      int (*param_encode) (const EVP_PKEY *pkey, unsigned char **pder);
      int (*param_missing) (const EVP_PKEY *pk);
      int (*param_copy) (EVP_PKEY *to, const EVP_PKEY *from);
      int (*param_cmp) (const EVP_PKEY *a, const EVP_PKEY *b);
      int (*param_print) (BIO *out, const EVP_PKEY *pkey, int indent,
                          ASN1_PCTX *pctx);
      int (*sig_print) (BIO *out,
                        const X509_ALGOR *sigalg, const ASN1_STRING *sig,
                        int indent, ASN1_PCTX *pctx);
      void (*pkey_free) (EVP_PKEY *pkey);
      int (*pkey_ctrl) (EVP_PKEY *pkey, int op, long arg1, void *arg2);
      /* Legacy functions for old PEM */
      int (*old_priv_decode) (EVP_PKEY *pkey,
                              const unsigned char **pder, int derlen);
      int (*old_priv_encode) (const EVP_PKEY *pkey, unsigned char **pder);
      /* Custom ASN1 signature verification */
      int (*item_verify) (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
                          X509_ALGOR *a, ASN1_BIT_STRING *sig, EVP_PKEY *pkey);
      int (*item_sign) (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
                        X509_ALGOR *alg1, X509_ALGOR *alg2,
                        ASN1_BIT_STRING *sig);
  } /* EVP_PKEY_ASN1_METHOD */ ;
  
  /*
   * Method to handle CRL access. In general a CRL could be very large (several
   * Mb) and can consume large amounts of resources if stored in memory by
   * multiple processes. This method allows general CRL operations to be
   * redirected to more efficient callbacks: for example a CRL entry database.
   */
  
  #define X509_CRL_METHOD_DYNAMIC         1
  
  struct x509_crl_method_st {
      int flags;
      int (*crl_init) (X509_CRL *crl);
      int (*crl_free) (X509_CRL *crl);
      int (*crl_lookup) (X509_CRL *crl, X509_REVOKED **ret,
                         ASN1_INTEGER *ser, X509_NAME *issuer);
      int (*crl_verify) (X509_CRL *crl, EVP_PKEY *pk);
  };
  