x509_vfy.h

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/* 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

/* Outer object */
typedef struct x509_hash_dir_st
   {
   int num_dirs;
   char **dirs;
   int *dirs_type;
   int num_dirs_alloced;
   } X509_HASH_DIR_CTX;

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 */
   int (*verify)(X509_STORE_CTX *ctx); /* called to verify a certificate */
   int (*verify_cb)(int ok,X509_STORE_CTX *ctx);   /* error callback */
   int (*get_issuer)(X509 **issuer, X509_STORE_CTX *ctx, X509 *x);   /* get issuers cert from ctx */
   int (*check_issued)(X509_STORE_CTX *ctx, X509 *x, X509 *issuer); /* check issued */
   int (*check_revocation)(X509_STORE_CTX *ctx); /* Check revocation status of chain */
   int (*get_crl)(X509_STORE_CTX *ctx, X509_CRL **crl, X509 *x); /* retrieve CRL */
   int (*check_crl)(X509_STORE_CTX *ctx, X509_CRL *crl); /* Check CRL validity */
   int (*cert_crl)(X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x); /* Check certificate against CRL */
   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;
   int current_method;  /* used when looking up certs */

   /* The following are set by the caller */
   X509 *cert;    /* The cert to check */
   STACK_OF(X509) *untrusted; /* chain of X509s - untrusted - passed in */
   STACK_OF(X509_CRL) *crls;  /* set of CRLs passed in */

   X509_VERIFY_PARAM *param;
   void *other_ctx;  /* Other info for use with get_issuer() */

   /* Callbacks for various operations */
   int (*verify)(X509_STORE_CTX *ctx); /* called to verify a certificate */
   int (*verify_cb)(int ok,X509_STORE_CTX *ctx);      /* error callback */
   int (*get_issuer)(X509 **issuer, X509_STORE_CTX *ctx, X509 *x);   /* get issuers cert from ctx */
   int (*check_issued)(X509_STORE_CTX *ctx, X509 *x, X509 *issuer); /* check issued */
   int (*check_revocation)(X509_STORE_CTX *ctx); /* Check revocation status of chain */
   int (*get_crl)(X509_STORE_CTX *ctx, X509_CRL **crl, X509 *x); /* retrieve CRL */
   int (*check_crl)(X509_STORE_CTX *ctx, X509_CRL *crl); /* Check CRL validity */
   int (*cert_crl)(X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x); /* Check certificate against CRL */
   int (*check_policy)(X509_STORE_CTX *ctx);
   int (*cleanup)(X509_STORE_CTX *ctx);

   /* The following is built up */
   int valid;     /* if 0, rebuild chain */
   int last_untrusted;  /* index of last untrusted cert */
   STACK_OF(X509) *chain;     /* chain of X509s - built up and trusted */
   X509_POLICY_TREE *tree; /* Valid policy tree */

   int explicit_policy; /* Require explicit policy value */

   /* When something goes wrong, this is why */
   int error_depth;
   int error;
   X509 *current_cert;
   X509 *current_issuer;   /* cert currently being tested as valid issuer */
   X509_CRL *current_crl;  /* current CRL */

   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
/* illegal error (for uninitialized values, to avoid X509_V_OK): 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_UNNESTED_RESOURCE        44

/* 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

#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);

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);

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);
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