text: /* crypto/x509/x509_vfy.h */
  /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * All rights reserved.
   *
   * This package is an SSL implementation written
   * by Eric Young (eay@cryptsoft.com).
   * The implementation was written so as to conform with Netscapes SSL.
   *
   * This library is free for commercial and non-commercial use as long as
   * the following conditions are aheared to.  The following conditions
   * apply to all code found in this distribution, be it the RC4, RSA,
   * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   * included with this distribution is covered by the same copyright terms
   * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   *
   * Copyright remains Eric Young's, and as such any Copyright notices in
   * the code are not to be removed.
   * If this package is used in a product, Eric Young should be given attribution
   * as the author of the parts of the library used.
   * This can be in the form of a textual message at program startup or
   * in documentation (online or textual) provided with the package.
   *
   * 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 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 acknowledgement:
   *    "This product includes cryptographic software written by
   *     Eric Young (eay@cryptsoft.com)"
   *    The word 'cryptographic' can be left out if the rouines from the library
   *    being used are not cryptographic related :-).
   * 4. If you include any Windows specific code (or a derivative thereof) from
   *    the apps directory (application code) you must include an acknowledgement:
   *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   *
   * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
   * ANY EXPRESS 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 AUTHOR OR 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.
   *
   * The licence and distribution terms for any publically available version or
   * derivative of this code cannot be changed.  i.e. this code cannot simply be
   * copied and put under another distribution licence
   * [including the GNU Public Licence.]
   */
  
  #ifndef HEADER_X509_H
  # include <openssl/x509.h>
  /*
   * openssl/x509.h ends up #include-ing this file at about the only
   * appropriate moment.
   */
  #endif
  
  #ifndef HEADER_X509_VFY_H
  # define HEADER_X509_VFY_H
  
  # include <openssl/opensslconf.h>
  # ifndef OPENSSL_NO_LHASH
  #  include <openssl/lhash.h>
  # endif
  # include <openssl/bio.h>
  # include <openssl/crypto.h>
  # include <openssl/symhacks.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
  # if 0
  /* Outer object */
  typedef struct x509_hash_dir_st {
      int num_dirs;
      char **dirs;
      int *dirs_type;
      int num_dirs_alloced;
  } X509_HASH_DIR_CTX;
  # endif
  
  typedef struct x509_file_st {
      int num_paths;              /* number of paths to files or directories */
      int num_alloced;
      char **paths;               /* the list of paths or directories */
      int *path_type;
  } X509_CERT_FILE_CTX;
  
  /*******************************/
  /*-
  SSL_CTX -> X509_STORE
                  -> X509_LOOKUP
                          ->X509_LOOKUP_METHOD
                  -> X509_LOOKUP
                          ->X509_LOOKUP_METHOD
  
  SSL     -> X509_STORE_CTX
                  ->X509_STORE
  
  The X509_STORE holds the tables etc for verification stuff.
  A X509_STORE_CTX is used while validating a single certificate.
  The X509_STORE has X509_LOOKUPs for looking up certs.
  The X509_STORE then calls a function to actually verify the
  certificate chain.
  */
  
  # define X509_LU_RETRY           -1
  # define X509_LU_FAIL            0
  # define X509_LU_X509            1
  # define X509_LU_CRL             2
  # define X509_LU_PKEY            3
  
  typedef struct x509_object_st {
      /* one of the above types */
      int type;
      union {
          char *ptr;
          X509 *x509;
          X509_CRL *crl;
          EVP_PKEY *pkey;
      } data;
  } X509_OBJECT;
  
  typedef struct x509_lookup_st X509_LOOKUP;
  
  DECLARE_STACK_OF(X509_LOOKUP)
  DECLARE_STACK_OF(X509_OBJECT)
  
  /* This is a static that defines the function interface */
  typedef struct x509_lookup_method_st {
      const char *name;
      int (*new_item) (X509_LOOKUP *ctx);
      void (*free) (X509_LOOKUP *ctx);
      int (*init) (X509_LOOKUP *ctx);
      int (*shutdown) (X509_LOOKUP *ctx);
      int (*ctrl) (X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
                   char **ret);
      int (*get_by_subject) (X509_LOOKUP *ctx, int type, X509_NAME *name,
                             X509_OBJECT *ret);
      int (*get_by_issuer_serial) (X509_LOOKUP *ctx, int type, X509_NAME *name,
                                   ASN1_INTEGER *serial, X509_OBJECT *ret);
      int (*get_by_fingerprint) (X509_LOOKUP *ctx, int type,
                                 unsigned char *bytes, int len,
                                 X509_OBJECT *ret);
      int (*get_by_alias) (X509_LOOKUP *ctx, int type, char *str, int len,
                           X509_OBJECT *ret);
  } X509_LOOKUP_METHOD;
  
  /*
   * This structure hold all parameters associated with a verify operation by
   * including an X509_VERIFY_PARAM structure in related structures the
   * parameters used can be customized
   */
  
  typedef struct X509_VERIFY_PARAM_st {
      char *name;
      time_t check_time;          /* Time to use */
      unsigned long inh_flags;    /* Inheritance flags */
      unsigned long flags;        /* Various verify flags */
      int purpose;                /* purpose to check untrusted certificates */
      int trust;                  /* trust setting to check */
      int depth;                  /* Verify depth */
      STACK_OF(ASN1_OBJECT) *policies; /* Permissible policies */
  } X509_VERIFY_PARAM;
  
  DECLARE_STACK_OF(X509_VERIFY_PARAM)
  
  /*
   * This is used to hold everything.  It is used for all certificate
   * validation.  Once we have a certificate chain, the 'verify' function is
   * then called to actually check the cert chain.
   */
  struct x509_store_st {
      /* The following is a cache of trusted certs */
      int cache;                  /* if true, stash any hits */
      STACK_OF(X509_OBJECT) *objs; /* Cache of all objects */
      /* These are external lookup methods */
      STACK_OF(X509_LOOKUP) *get_cert_methods;
      X509_VERIFY_PARAM *param;
      /* Callbacks for various operations */
      /* called to verify a certificate */
      int (*verify) (X509_STORE_CTX *ctx);
      /* error callback */
      int (*verify_cb) (int ok, X509_STORE_CTX *ctx);
      /* get issuers cert from ctx */
      int (*get_issuer) (X509 **issuer, X509_STORE_CTX *ctx, X509 *x);
      /* check issued */
      int (*check_issued) (X509_STORE_CTX *ctx, X509 *x, X509 *issuer);
      /* Check revocation status of chain */
      int (*check_revocation) (X509_STORE_CTX *ctx);
      /* retrieve CRL */
      int (*get_crl) (X509_STORE_CTX *ctx, X509_CRL **crl, X509 *x);
      /* Check CRL validity */
      int (*check_crl) (X509_STORE_CTX *ctx, X509_CRL *crl);
      /* Check certificate against CRL */
      int (*cert_crl) (X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x);
      STACK_OF(X509) *(*lookup_certs) (X509_STORE_CTX *ctx, X509_NAME *nm);
      STACK_OF(X509_CRL) *(*lookup_crls) (X509_STORE_CTX *ctx, X509_NAME *nm);
      int (*cleanup) (X509_STORE_CTX *ctx);
      CRYPTO_EX_DATA ex_data;
      int references;
  } /* X509_STORE */ ;
  
  int X509_STORE_set_depth(X509_STORE *store, int depth);
  
  # define X509_STORE_set_verify_cb_func(ctx,func) ((ctx)->verify_cb=(func))
  # define X509_STORE_set_verify_func(ctx,func)    ((ctx)->verify=(func))
  
  /* This is the functions plus an instance of the local variables. */
  struct x509_lookup_st {
      int init;                   /* have we been started */
      int skip;                   /* don't use us. */
      X509_LOOKUP_METHOD *method; /* the functions */
      char *method_data;          /* method data */
      X509_STORE *store_ctx;      /* who owns us */
  } /* X509_LOOKUP */ ;
  
  /*
   * This is a used when verifying cert chains.  Since the gathering of the
   * cert chain can take some time (and have to be 'retried', this needs to be
   * kept and passed around.
   */
  struct x509_store_ctx_st {      /* X509_STORE_CTX */
      X509_STORE *ctx;
      /* used when looking up certs */
      int current_method;
      /* The following are set by the caller */
      /* The cert to check */
      X509 *cert;
      /* chain of X509s - untrusted - passed in */
      STACK_OF(X509) *untrusted;
      /* set of CRLs passed in */
      STACK_OF(X509_CRL) *crls;
      X509_VERIFY_PARAM *param;
      /* Other info for use with get_issuer() */
      void *other_ctx;
      /* Callbacks for various operations */
      /* called to verify a certificate */
      int (*verify) (X509_STORE_CTX *ctx);
      /* error callback */
      int (*verify_cb) (int ok, X509_STORE_CTX *ctx);
      /* get issuers cert from ctx */
      int (*get_issuer) (X509 **issuer, X509_STORE_CTX *ctx, X509 *x);
      /* check issued */
      int (*check_issued) (X509_STORE_CTX *ctx, X509 *x, X509 *issuer);
      /* Check revocation status of chain */
      int (*check_revocation) (X509_STORE_CTX *ctx);
      /* retrieve CRL */
      int (*get_crl) (X509_STORE_CTX *ctx, X509_CRL **crl, X509 *x);
      /* Check CRL validity */
      int (*check_crl) (X509_STORE_CTX *ctx, X509_CRL *crl);
      /* Check certificate against CRL */
      int (*cert_crl) (X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x);
      int (*check_policy) (X509_STORE_CTX *ctx);
      STACK_OF(X509) *(*lookup_certs) (X509_STORE_CTX *ctx, X509_NAME *nm);
      STACK_OF(X509_CRL) *(*lookup_crls) (X509_STORE_CTX *ctx, X509_NAME *nm);
      int (*cleanup) (X509_STORE_CTX *ctx);
      /* The following is built up */
      /* if 0, rebuild chain */
      int valid;
      /* index of last untrusted cert */
      int last_untrusted;
      /* chain of X509s - built up and trusted */
      STACK_OF(X509) *chain;
      /* Valid policy tree */
      X509_POLICY_TREE *tree;
      /* Require explicit policy value */
      int explicit_policy;
      /* When something goes wrong, this is why */
      int error_depth;
      int error;
      X509 *current_cert;
      /* cert currently being tested as valid issuer */
      X509 *current_issuer;
      /* current CRL */
      X509_CRL *current_crl;
      /* score of current CRL */
      int current_crl_score;
      /* Reason mask */
      unsigned int current_reasons;
      /* For CRL path validation: parent context */
      X509_STORE_CTX *parent;
      CRYPTO_EX_DATA ex_data;
  } /* X509_STORE_CTX */ ;
  
  void X509_STORE_CTX_set_depth(X509_STORE_CTX *ctx, int depth);
  
  # define X509_STORE_CTX_set_app_data(ctx,data) \
          X509_STORE_CTX_set_ex_data(ctx,0,data)
  # define X509_STORE_CTX_get_app_data(ctx) \
          X509_STORE_CTX_get_ex_data(ctx,0)
  
  # define X509_L_FILE_LOAD        1
  # define X509_L_ADD_DIR          2
  
  # define X509_LOOKUP_load_file(x,name,type) \
                  X509_LOOKUP_ctrl((x),X509_L_FILE_LOAD,(name),(long)(type),NULL)
  
  # define X509_LOOKUP_add_dir(x,name,type) \
                  X509_LOOKUP_ctrl((x),X509_L_ADD_DIR,(name),(long)(type),NULL)
  
  # define         X509_V_OK                                       0
  # define         X509_V_ERR_UNSPECIFIED                          1
  
  # define         X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT            2
  # define         X509_V_ERR_UNABLE_TO_GET_CRL                    3
  # define         X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE     4
  # define         X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE      5
  # define         X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY   6
  # define         X509_V_ERR_CERT_SIGNATURE_FAILURE               7
  # define         X509_V_ERR_CRL_SIGNATURE_FAILURE                8
  # define         X509_V_ERR_CERT_NOT_YET_VALID                   9
  # define         X509_V_ERR_CERT_HAS_EXPIRED                     10
  # define         X509_V_ERR_CRL_NOT_YET_VALID                    11
  # define         X509_V_ERR_CRL_HAS_EXPIRED                      12
  # define         X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD       13
  # define         X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD        14
  # define         X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD       15
  # define         X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD       16
  # define         X509_V_ERR_OUT_OF_MEM                           17
  # define         X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT          18
  # define         X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN            19
  # define         X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY    20
  # define         X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE      21
  # define         X509_V_ERR_CERT_CHAIN_TOO_LONG                  22
  # define         X509_V_ERR_CERT_REVOKED                         23
  # define         X509_V_ERR_INVALID_CA                           24
  # define         X509_V_ERR_PATH_LENGTH_EXCEEDED                 25
  # define         X509_V_ERR_INVALID_PURPOSE                      26
  # define         X509_V_ERR_CERT_UNTRUSTED                       27
  # define         X509_V_ERR_CERT_REJECTED                        28
  /* These are 'informational' when looking for issuer cert */
  # define         X509_V_ERR_SUBJECT_ISSUER_MISMATCH              29
  # define         X509_V_ERR_AKID_SKID_MISMATCH                   30
  # define         X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH          31
  # define         X509_V_ERR_KEYUSAGE_NO_CERTSIGN                 32
  
  # define         X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER             33
  # define         X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION         34
  # define         X509_V_ERR_KEYUSAGE_NO_CRL_SIGN                 35
  # define         X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION     36
  # define         X509_V_ERR_INVALID_NON_CA                       37
  # define         X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED           38
  # define         X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE        39
  # define         X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED       40
  
  # define         X509_V_ERR_INVALID_EXTENSION                    41
  # define         X509_V_ERR_INVALID_POLICY_EXTENSION             42
  # define         X509_V_ERR_NO_EXPLICIT_POLICY                   43
  # define         X509_V_ERR_DIFFERENT_CRL_SCOPE                  44
  # define         X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE        45
  
  # define         X509_V_ERR_UNNESTED_RESOURCE                    46
  
  # define         X509_V_ERR_PERMITTED_VIOLATION                  47
  # define         X509_V_ERR_EXCLUDED_VIOLATION                   48
  # define         X509_V_ERR_SUBTREE_MINMAX                       49
  # define         X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE          51
  # define         X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX        52
  # define         X509_V_ERR_UNSUPPORTED_NAME_SYNTAX              53
  # define         X509_V_ERR_CRL_PATH_VALIDATION_ERROR            54
  
  /* The application is not happy */
  # define         X509_V_ERR_APPLICATION_VERIFICATION             50
  
  /* Certificate verify flags */
  
  /* Send issuer+subject checks to verify_cb */
  # define X509_V_FLAG_CB_ISSUER_CHECK             0x1
  /* Use check time instead of current time */
  # define X509_V_FLAG_USE_CHECK_TIME              0x2
  /* Lookup CRLs */
  # define X509_V_FLAG_CRL_CHECK                   0x4
  /* Lookup CRLs for whole chain */
  # define X509_V_FLAG_CRL_CHECK_ALL               0x8
  /* Ignore unhandled critical extensions */
  # define X509_V_FLAG_IGNORE_CRITICAL             0x10
  /* Disable workarounds for broken certificates */
  # define X509_V_FLAG_X509_STRICT                 0x20
  /* Enable proxy certificate validation */
  # define X509_V_FLAG_ALLOW_PROXY_CERTS           0x40
  /* Enable policy checking */
  # define X509_V_FLAG_POLICY_CHECK                0x80
  /* Policy variable require-explicit-policy */
  # define X509_V_FLAG_EXPLICIT_POLICY             0x100
  /* Policy variable inhibit-any-policy */
  # define X509_V_FLAG_INHIBIT_ANY                 0x200
  /* Policy variable inhibit-policy-mapping */
  # define X509_V_FLAG_INHIBIT_MAP                 0x400
  /* Notify callback that policy is OK */
  # define X509_V_FLAG_NOTIFY_POLICY               0x800
  /* Extended CRL features such as indirect CRLs, alternate CRL signing keys */
  # define X509_V_FLAG_EXTENDED_CRL_SUPPORT        0x1000
  /* Delta CRL support */
  # define X509_V_FLAG_USE_DELTAS                  0x2000
  /* Check selfsigned CA signature */
  # define X509_V_FLAG_CHECK_SS_SIGNATURE          0x4000
  /*
   * If the initial chain is not trusted, do not attempt to build an alternative
   * chain. Alternate chain checking was introduced in 1.0.1n/1.0.2b. Setting
   * this flag will force the behaviour to match that of previous versions.
   */
  # define X509_V_FLAG_NO_ALT_CHAINS               0x100000
  
  # define X509_VP_FLAG_DEFAULT                    0x1
  # define X509_VP_FLAG_OVERWRITE                  0x2
  # define X509_VP_FLAG_RESET_FLAGS                0x4
  # define X509_VP_FLAG_LOCKED                     0x8
  # define X509_VP_FLAG_ONCE                       0x10
  
  /* Internal use: mask of policy related options */
  # define X509_V_FLAG_POLICY_MASK (X509_V_FLAG_POLICY_CHECK \
                                  | X509_V_FLAG_EXPLICIT_POLICY \
                                  | X509_V_FLAG_INHIBIT_ANY \
                                  | X509_V_FLAG_INHIBIT_MAP)
  
  int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
                                 X509_NAME *name);
  X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h,
                                               int type, X509_NAME *name);
  X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h,
                                          X509_OBJECT *x);
  void X509_OBJECT_up_ref_count(X509_OBJECT *a);
  void X509_OBJECT_free_contents(X509_OBJECT *a);
  X509_STORE *X509_STORE_new(void);
  void X509_STORE_free(X509_STORE *v);
  
  STACK_OF(X509) *X509_STORE_get1_certs(X509_STORE_CTX *st, X509_NAME *nm);
  STACK_OF(X509_CRL) *X509_STORE_get1_crls(X509_STORE_CTX *st, X509_NAME *nm);
  int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags);
  int X509_STORE_set_purpose(X509_STORE *ctx, int purpose);
  int X509_STORE_set_trust(X509_STORE *ctx, int trust);
  int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *pm);
  
  void X509_STORE_set_verify_cb(X509_STORE *ctx,
                                int (*verify_cb) (int, X509_STORE_CTX *));
  
  X509_STORE_CTX *X509_STORE_CTX_new(void);
  
  int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x);
  
  void X509_STORE_CTX_free(X509_STORE_CTX *ctx);
  int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store,
                          X509 *x509, STACK_OF(X509) *chain);
  void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk);
  void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx);
  
  X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m);
  
  X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void);
  X509_LOOKUP_METHOD *X509_LOOKUP_file(void);
  
  int X509_STORE_add_cert(X509_STORE *ctx, X509 *x);
  int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x);
  
  int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
                                X509_OBJECT *ret);
  
  int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
                       long argl, char **ret);
  
  # ifndef OPENSSL_NO_STDIO
  int X509_load_cert_file(X509_LOOKUP *ctx, const char *file, int type);
  int X509_load_crl_file(X509_LOOKUP *ctx, const char *file, int type);
  int X509_load_cert_crl_file(X509_LOOKUP *ctx, const char *file, int type);
  # endif
  
  X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method);
  void X509_LOOKUP_free(X509_LOOKUP *ctx);
  int X509_LOOKUP_init(X509_LOOKUP *ctx);
  int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
                             X509_OBJECT *ret);
  int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
                                   ASN1_INTEGER *serial, X509_OBJECT *ret);
  int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
                                 unsigned char *bytes, int len,
                                 X509_OBJECT *ret);
  int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
                           X509_OBJECT *ret);
  int X509_LOOKUP_shutdown(X509_LOOKUP *ctx);
  
  # ifndef OPENSSL_NO_STDIO
  int X509_STORE_load_locations(X509_STORE *ctx,
                                const char *file, const char *dir);
  int X509_STORE_set_default_paths(X509_STORE *ctx);
  # endif
  
  int X509_STORE_CTX_get_ex_new_index(long argl, void *argp,
                                      CRYPTO_EX_new *new_func,
                                      CRYPTO_EX_dup *dup_func,
                                      CRYPTO_EX_free *free_func);
  int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data);
  void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx);
  int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx);
  void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int s);
  int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx);
  X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx);
  X509 *X509_STORE_CTX_get0_current_issuer(X509_STORE_CTX *ctx);
  X509_CRL *X509_STORE_CTX_get0_current_crl(X509_STORE_CTX *ctx);
  X509_STORE_CTX *X509_STORE_CTX_get0_parent_ctx(X509_STORE_CTX *ctx);
  STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx);
  STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx);
  void X509_STORE_CTX_set_cert(X509_STORE_CTX *c, X509 *x);
  void X509_STORE_CTX_set_chain(X509_STORE_CTX *c, STACK_OF(X509) *sk);
  void X509_STORE_CTX_set0_crls(X509_STORE_CTX *c, STACK_OF(X509_CRL) *sk);
  int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose);
  int X509_STORE_CTX_set_trust(X509_STORE_CTX *ctx, int trust);
  int X509_STORE_CTX_purpose_inherit(X509_STORE_CTX *ctx, int def_purpose,
                                     int purpose, int trust);
  void X509_STORE_CTX_set_flags(X509_STORE_CTX *ctx, unsigned long flags);
  void X509_STORE_CTX_set_time(X509_STORE_CTX *ctx, unsigned long flags,
                               time_t t);
  void X509_STORE_CTX_set_verify_cb(X509_STORE_CTX *ctx,
                                    int (*verify_cb) (int, X509_STORE_CTX *));
  
  X509_POLICY_TREE *X509_STORE_CTX_get0_policy_tree(X509_STORE_CTX *ctx);
  int X509_STORE_CTX_get_explicit_policy(X509_STORE_CTX *ctx);
  
  X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *ctx);
  void X509_STORE_CTX_set0_param(X509_STORE_CTX *ctx, X509_VERIFY_PARAM *param);
  int X509_STORE_CTX_set_default(X509_STORE_CTX *ctx, const char *name);
  
  /* X509_VERIFY_PARAM functions */
  
  X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void);
  void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param);
  int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *to,
                                const X509_VERIFY_PARAM *from);
  int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
                             const X509_VERIFY_PARAM *from);
  int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name);
  int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param,
                                  unsigned long flags);
  int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
                                    unsigned long flags);
  unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param);
  int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose);
  int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust);
  void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth);
  void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t);
  int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
                                    ASN1_OBJECT *policy);
  int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
                                      STACK_OF(ASN1_OBJECT) *policies);
  int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param);
  
  int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param);
  const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name);
  void X509_VERIFY_PARAM_table_cleanup(void);
  
  int X509_policy_check(X509_POLICY_TREE **ptree, int *pexplicit_policy,
                        STACK_OF(X509) *certs,
                        STACK_OF(ASN1_OBJECT) *policy_oids, unsigned int flags);
  
  void X509_policy_tree_free(X509_POLICY_TREE *tree);
  
  int X509_policy_tree_level_count(const X509_POLICY_TREE *tree);
  X509_POLICY_LEVEL *X509_policy_tree_get0_level(const X509_POLICY_TREE *tree,
                                                 int i);
  
  STACK_OF(X509_POLICY_NODE) *X509_policy_tree_get0_policies(const
                                                             X509_POLICY_TREE
                                                             *tree);
  
  STACK_OF(X509_POLICY_NODE) *X509_policy_tree_get0_user_policies(const
                                                                  X509_POLICY_TREE
                                                                  *tree);
  
  int X509_policy_level_node_count(X509_POLICY_LEVEL *level);
  
  X509_POLICY_NODE *X509_policy_level_get0_node(X509_POLICY_LEVEL *level,
                                                int i);
  
  const ASN1_OBJECT *X509_policy_node_get0_policy(const X509_POLICY_NODE *node);
  
  STACK_OF(POLICYQUALINFO) *X509_policy_node_get0_qualifiers(const
                                                             X509_POLICY_NODE
                                                             *node);
  const X509_POLICY_NODE *X509_policy_node_get0_parent(const X509_POLICY_NODE
                                                       *node);
  
  #ifdef  __cplusplus
  }
  #endif
  #endif
  