Unleashed v1.4

[unleashed.git] / lib / libcrypto / x509 / x509_lu.c

/* $OpenBSD: x509_lu.c,v 1.30 2018/08/24 19:21:09 tb Exp $ */
/* 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.]
 */

#include <stdio.h>

#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "x509_lcl.h"

static void X509_OBJECT_dec_ref_count(X509_OBJECT *a);

X509_LOOKUP *
X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
{
        X509_LOOKUP *ret;

        ret = malloc(sizeof(X509_LOOKUP));
        if (ret == NULL)
                return NULL;

        ret->init = 0;
        ret->skip = 0;
        ret->method = method;
        ret->method_data = NULL;
        ret->store_ctx = NULL;
        if ((method->new_item != NULL) && !method->new_item(ret)) {
                free(ret);
                return NULL;
        }
        return ret;
}

void
X509_LOOKUP_free(X509_LOOKUP *ctx)
{
        if (ctx == NULL)
                return;
        if ((ctx->method != NULL) && (ctx->method->free != NULL))
                (*ctx->method->free)(ctx);
        free(ctx);
}

int
X509_LOOKUP_init(X509_LOOKUP *ctx)
{
        if (ctx->method == NULL)
                return 0;
        if (ctx->method->init != NULL)
                return ctx->method->init(ctx);
        else
                return 1;
}

int
X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
{
        if (ctx->method == NULL)
                return 0;
        if (ctx->method->shutdown != NULL)
                return ctx->method->shutdown(ctx);
        else
                return 1;
}

int
X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
    char **ret)
{
        if (ctx->method == NULL)
                return -1;
        if (ctx->method->ctrl != NULL)
                return ctx->method->ctrl(ctx, cmd, argc, argl, ret);
        else
                return 1;
}

int
X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
    X509_OBJECT *ret)
{
        if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
                return X509_LU_FAIL;
        if (ctx->skip)
                return 0;
        return ctx->method->get_by_subject(ctx, type, name, ret);
}

int
X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
    ASN1_INTEGER *serial, X509_OBJECT *ret)
{
        if ((ctx->method == NULL) ||
            (ctx->method->get_by_issuer_serial == NULL))
                return X509_LU_FAIL;
        return ctx->method->get_by_issuer_serial(ctx, type, name, serial, ret);
}

int
X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
    const unsigned char *bytes, int len, X509_OBJECT *ret)
{
        if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
                return X509_LU_FAIL;
        return ctx->method->get_by_fingerprint(ctx, type, bytes, len, ret);
}

int
X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, const char *str, int len,
    X509_OBJECT *ret)
{
        if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
                return X509_LU_FAIL;
        return ctx->method->get_by_alias(ctx, type, str, len, ret);
}

static int
x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b)
{
        int ret;

        ret = ((*a)->type - (*b)->type);
        if (ret)
                return ret;
        switch ((*a)->type) {
        case X509_LU_X509:
                ret = X509_subject_name_cmp((*a)->data.x509, (*b)->data.x509);
                break;
        case X509_LU_CRL:
                ret = X509_CRL_cmp((*a)->data.crl, (*b)->data.crl);
                break;
        default:
                /* abort(); */
                return 0;
        }
        return ret;
}

X509_STORE *
X509_STORE_new(void)
{
        X509_STORE *ret;

        if ((ret = malloc(sizeof(X509_STORE))) == NULL)
                return NULL;
        ret->objs = sk_X509_OBJECT_new(x509_object_cmp);
        ret->cache = 1;
        ret->get_cert_methods = sk_X509_LOOKUP_new_null();
        ret->verify = 0;
        ret->verify_cb = 0;

        if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
                goto err;

        ret->get_issuer = 0;
        ret->check_issued = 0;
        ret->check_revocation = 0;
        ret->get_crl = 0;
        ret->check_crl = 0;
        ret->cert_crl = 0;
        ret->lookup_certs = 0;
        ret->lookup_crls = 0;
        ret->cleanup = 0;

        if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
                goto err;

        ret->references = 1;
        return ret;

err:
        X509_VERIFY_PARAM_free(ret->param);
        sk_X509_LOOKUP_free(ret->get_cert_methods);
        sk_X509_OBJECT_free(ret->objs);
        free(ret);
        return NULL;
}

static void
X509_OBJECT_free(X509_OBJECT *a)
{
        X509_OBJECT_free_contents(a);
        free(a);
}

void
X509_STORE_free(X509_STORE *vfy)
{
        int i;
        STACK_OF(X509_LOOKUP) *sk;
        X509_LOOKUP *lu;

        if (vfy == NULL)
                return;

        i = CRYPTO_add(&vfy->references, -1, CRYPTO_LOCK_X509_STORE);
        if (i > 0)
                return;

        sk = vfy->get_cert_methods;
        for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
                lu = sk_X509_LOOKUP_value(sk, i);
                X509_LOOKUP_shutdown(lu);
                X509_LOOKUP_free(lu);
        }
        sk_X509_LOOKUP_free(sk);
        sk_X509_OBJECT_pop_free(vfy->objs, X509_OBJECT_free);

        CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
        X509_VERIFY_PARAM_free(vfy->param);
        free(vfy);
}

int
X509_STORE_up_ref(X509_STORE *x)
{
        int refs = CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_STORE);
        return (refs > 1) ? 1 : 0;
}

X509_LOOKUP *
X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
{
        int i;
        STACK_OF(X509_LOOKUP) *sk;
        X509_LOOKUP *lu;

        sk = v->get_cert_methods;
        for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) {
                lu = sk_X509_LOOKUP_value(sk, i);
                if (m == lu->method) {
                        return lu;
                }
        }
        /* a new one */
        lu = X509_LOOKUP_new(m);
        if (lu == NULL)
                return NULL;
        else {
                lu->store_ctx = v;
                if (sk_X509_LOOKUP_push(v->get_cert_methods, lu))
                        return lu;
                else {
                        X509_LOOKUP_free(lu);
                        return NULL;
                }
        }
}

int
X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
    X509_OBJECT *ret)
{
        X509_STORE *ctx = vs->ctx;
        X509_LOOKUP *lu;
        X509_OBJECT stmp, *tmp;
        int i, j;

        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
        tmp = X509_OBJECT_retrieve_by_subject(ctx->objs, type, name);
        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);

        if (tmp == NULL || type == X509_LU_CRL) {
                for (i = vs->current_method;
                    i < sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) {
                        lu = sk_X509_LOOKUP_value(ctx->get_cert_methods, i);
                        j = X509_LOOKUP_by_subject(lu, type, name, &stmp);
                        if (j < 0) {
                                vs->current_method = j;
                                return j;
                        } else if (j) {
                                tmp = &stmp;
                                break;
                        }
                }
                vs->current_method = 0;
                if (tmp == NULL)
                        return 0;
        }

/*      if (ret->data.ptr != NULL)
                X509_OBJECT_free_contents(ret); */

        ret->type = tmp->type;
        ret->data.ptr = tmp->data.ptr;

        X509_OBJECT_up_ref_count(ret);

        return 1;
}

int
X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
{
        X509_OBJECT *obj;
        int ret = 1;

        if (x == NULL)
                return 0;
        obj = malloc(sizeof(X509_OBJECT));
        if (obj == NULL) {
                X509error(ERR_R_MALLOC_FAILURE);
                return 0;
        }
        obj->type = X509_LU_X509;
        obj->data.x509 = x;

        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);

        X509_OBJECT_up_ref_count(obj);

        if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
                X509error(X509_R_CERT_ALREADY_IN_HASH_TABLE);
                ret = 0;
        } else {
                if (sk_X509_OBJECT_push(ctx->objs, obj) == 0) {
                        X509error(ERR_R_MALLOC_FAILURE);
                        ret = 0;
                }
        }

        if (ret == 0)
                X509_OBJECT_dec_ref_count(obj);

        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);

        if (ret == 0) {
                obj->data.x509 = NULL; /* owned by the caller */
                X509_OBJECT_free(obj);
        }

        return ret;
}

int
X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
{
        X509_OBJECT *obj;
        int ret = 1;

        if (x == NULL)
                return 0;
        obj = malloc(sizeof(X509_OBJECT));
        if (obj == NULL) {
                X509error(ERR_R_MALLOC_FAILURE);
                return 0;
        }
        obj->type = X509_LU_CRL;
        obj->data.crl = x;

        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);

        X509_OBJECT_up_ref_count(obj);

        if (X509_OBJECT_retrieve_match(ctx->objs, obj)) {
                X509error(X509_R_CERT_ALREADY_IN_HASH_TABLE);
                ret = 0;
        } else {
                if (sk_X509_OBJECT_push(ctx->objs, obj) == 0) {
                        X509error(ERR_R_MALLOC_FAILURE);
                        ret = 0;
                }
        }

        if (ret == 0)
                X509_OBJECT_dec_ref_count(obj);

        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);

        if (ret == 0) {
                obj->data.crl = NULL; /* owned by the caller */
                X509_OBJECT_free(obj);
        }

        return ret;
}

static void
X509_OBJECT_dec_ref_count(X509_OBJECT *a)
{
        switch (a->type) {
        case X509_LU_X509:
                CRYPTO_add(&a->data.x509->references, -1, CRYPTO_LOCK_X509);
                break;
        case X509_LU_CRL:
                CRYPTO_add(&a->data.crl->references, -1, CRYPTO_LOCK_X509_CRL);
                break;
        }
}

int
X509_OBJECT_up_ref_count(X509_OBJECT *a)
{
        switch (a->type) {
        case X509_LU_X509:
                return X509_up_ref(a->data.x509);
        case X509_LU_CRL:
                return X509_CRL_up_ref(a->data.crl);
        }
        return 1;
}

int
X509_OBJECT_get_type(const X509_OBJECT *a)
{
        return a->type;
}

void
X509_OBJECT_free_contents(X509_OBJECT *a)
{
        switch (a->type) {
        case X509_LU_X509:
                X509_free(a->data.x509);
                break;
        case X509_LU_CRL:
                X509_CRL_free(a->data.crl);
                break;
        }
}

static int
x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type, X509_NAME *name,
    int *pnmatch)
{
        X509_OBJECT stmp;
        X509 x509_s;
        X509_CINF cinf_s;
        X509_CRL crl_s;
        X509_CRL_INFO crl_info_s;
        int idx;

        stmp.type = type;
        switch (type) {
        case X509_LU_X509:
                stmp.data.x509 = &x509_s;
                x509_s.cert_info = &cinf_s;
                cinf_s.subject = name;
                break;
        case X509_LU_CRL:
                stmp.data.crl = &crl_s;
                crl_s.crl = &crl_info_s;
                crl_info_s.issuer = name;
                break;
        default:
                /* abort(); */
                return -1;
        }

        idx = sk_X509_OBJECT_find(h, &stmp);
        if (idx >= 0 && pnmatch) {
                int tidx;
                const X509_OBJECT *tobj, *pstmp;
                *pnmatch = 1;
                pstmp = &stmp;
                for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++) {
                        tobj = sk_X509_OBJECT_value(h, tidx);
                        if (x509_object_cmp(&tobj, &pstmp))
                                break;
                        (*pnmatch)++;
                }
        }
        return idx;
}

int
X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type, X509_NAME *name)
{
        return x509_object_idx_cnt(h, type, name, NULL);
}

X509_OBJECT *
X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
    X509_NAME *name)
{
        int idx;

        idx = X509_OBJECT_idx_by_subject(h, type, name);
        if (idx == -1)
                return NULL;
        return sk_X509_OBJECT_value(h, idx);
}

X509 *
X509_OBJECT_get0_X509(const X509_OBJECT *xo)
{
        if (xo != NULL && xo->type == X509_LU_X509)
                return xo->data.x509;
        return NULL;
}

X509_CRL *
X509_OBJECT_get0_X509_CRL(X509_OBJECT *xo)
{
        if (xo != NULL && xo->type == X509_LU_CRL)
                return xo->data.crl;
        return NULL;
}

STACK_OF(X509) *
X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
{
        int i, idx, cnt;
        STACK_OF(X509) *sk;
        X509 *x;
        X509_OBJECT *obj;

        sk = sk_X509_new_null();
        if (sk == NULL)
                return NULL;
        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
        idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
        if (idx < 0) {
                /* Nothing found in cache: do lookup to possibly add new
                 * objects to cache
                 */
                X509_OBJECT xobj;
                CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
                if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj)) {
                        sk_X509_free(sk);
                        return NULL;
                }
                X509_OBJECT_free_contents(&xobj);
                CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
                idx = x509_object_idx_cnt(ctx->ctx->objs,
                    X509_LU_X509, nm, &cnt);
                if (idx < 0) {
                        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
                        sk_X509_free(sk);
                        return NULL;
                }
        }
        for (i = 0; i < cnt; i++, idx++) {
                obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
                x = obj->data.x509;
                CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
                if (!sk_X509_push(sk, x)) {
                        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
                        X509_free(x);
                        sk_X509_pop_free(sk, X509_free);
                        return NULL;
                }
        }
        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
        return sk;

}

STACK_OF(X509_CRL) *
X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
{
        int i, idx, cnt;
        STACK_OF(X509_CRL) *sk;
        X509_CRL *x;
        X509_OBJECT *obj, xobj;

        sk = sk_X509_CRL_new_null();
        if (sk == NULL)
                return NULL;
        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
        /* Check cache first */
        idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);

        /* Always do lookup to possibly add new CRLs to cache
         */
        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
        if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj)) {
                sk_X509_CRL_free(sk);
                return NULL;
        }
        X509_OBJECT_free_contents(&xobj);
        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
        idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
        if (idx < 0) {
                CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
                sk_X509_CRL_free(sk);
                return NULL;
        }

        for (i = 0; i < cnt; i++, idx++) {
                obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
                x = obj->data.crl;
                CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
                if (!sk_X509_CRL_push(sk, x)) {
                        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
                        X509_CRL_free(x);
                        sk_X509_CRL_pop_free(sk, X509_CRL_free);
                        return NULL;
                }
        }
        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
        return sk;
}

X509_OBJECT *
X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
{
        int idx, i;
        X509_OBJECT *obj;

        idx = sk_X509_OBJECT_find(h, x);
        if (idx == -1)
                return NULL;
        if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
                return sk_X509_OBJECT_value(h, idx);
        for (i = idx; i < sk_X509_OBJECT_num(h); i++) {
                obj = sk_X509_OBJECT_value(h, i);
                if (x509_object_cmp((const X509_OBJECT **)&obj,
                    (const X509_OBJECT **)&x))
                        return NULL;
                if (x->type == X509_LU_X509) {
                        if (!X509_cmp(obj->data.x509, x->data.x509))
                                return obj;
                } else if (x->type == X509_LU_CRL) {
                        if (!X509_CRL_match(obj->data.crl, x->data.crl))
                                return obj;
                } else
                        return obj;
        }
        return NULL;
}

/* Try to get issuer certificate from store. Due to limitations
 * of the API this can only retrieve a single certificate matching
 * a given subject name. However it will fill the cache with all
 * matching certificates, so we can examine the cache for all
 * matches.
 *
 * Return values are:
 *  1 lookup successful.
 *  0 certificate not found.
 * -1 some other error.
 */
int
X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
{
        X509_NAME *xn;
        X509_OBJECT obj, *pobj;
        int i, ok, idx, ret;

        *issuer = NULL;
        xn = X509_get_issuer_name(x);
        ok = X509_STORE_get_by_subject(ctx, X509_LU_X509, xn, &obj);
        if (ok != X509_LU_X509) {
                if (ok == X509_LU_RETRY) {
                        X509_OBJECT_free_contents(&obj);
                        X509error(X509_R_SHOULD_RETRY);
                        return -1;
                } else if (ok != X509_LU_FAIL) {
                        X509_OBJECT_free_contents(&obj);
                        /* not good :-(, break anyway */
                        return -1;
                }
                return 0;
        }
        /* If certificate matches all OK */
        if (ctx->check_issued(ctx, x, obj.data.x509)) {
                if (x509_check_cert_time(ctx, obj.data.x509, 1)) {
                        *issuer = obj.data.x509;
                        return 1;
                }
        }
        X509_OBJECT_free_contents(&obj);

        /* Else find index of first cert accepted by 'check_issued' */
        ret = 0;
        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
        idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
        if (idx != -1) /* should be true as we've had at least one match */ {
                /* Look through all matching certs for suitable issuer */
                for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) {
                        pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
                        /* See if we've run past the matches */
                        if (pobj->type != X509_LU_X509)
                                break;
                        if (X509_NAME_cmp(xn,
                            X509_get_subject_name(pobj->data.x509)))
                                break;
                        if (ctx->check_issued(ctx, x, pobj->data.x509)) {
                                *issuer = pobj->data.x509;
                                ret = 1;
                                /*
                                 * If times check, exit with match,
                                 * otherwise keep looking. Leave last
                                 * match in issuer so we return nearest
                                 * match if no certificate time is OK.
                                 */
                                if (x509_check_cert_time(ctx, *issuer, 1))
                                        break;
                        }
                }
        }
        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
        if (*issuer)
                CRYPTO_add(&(*issuer)->references, 1, CRYPTO_LOCK_X509);
        return ret;
}

STACK_OF(X509_OBJECT) *
X509_STORE_get0_objects(X509_STORE *xs)
{
        return xs->objs;
}

void *
X509_STORE_get_ex_data(X509_STORE *xs, int idx)
{
        return CRYPTO_get_ex_data(&xs->ex_data, idx);
}

int
X509_STORE_set_ex_data(X509_STORE *xs, int idx, void *data)
{
        return CRYPTO_set_ex_data(&xs->ex_data, idx, data);
}

int
X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
{
        return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
}

int
X509_STORE_set_depth(X509_STORE *ctx, int depth)
{
        X509_VERIFY_PARAM_set_depth(ctx->param, depth);
        return 1;
}

int
X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
{
        return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
}

int
X509_STORE_set_trust(X509_STORE *ctx, int trust)
{
        return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
}

int
X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
{
        return X509_VERIFY_PARAM_set1(ctx->param, param);
}

X509_VERIFY_PARAM *
X509_STORE_get0_param(X509_STORE *ctx)
{
        return ctx->param;
}

void
X509_STORE_set_verify_cb(X509_STORE *ctx,
    int (*verify_cb)(int, X509_STORE_CTX *))
{
        ctx->verify_cb = verify_cb;
}