439 lines
13 KiB
C
439 lines
13 KiB
C
/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#if defined (__TANDEM) && defined (_SPT_MODEL_)
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/*
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* These definitions have to come first in SPT due to scoping of the
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* declarations in c99 associated with SPT use of stat.
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*/
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# include <sys/types.h>
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# include <sys/stat.h>
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#endif
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#include "internal/e_os.h"
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#include "internal/cryptlib.h"
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#include <stdio.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/types.h>
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#ifndef OPENSSL_NO_POSIX_IO
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# include <sys/stat.h>
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#endif
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#include <openssl/x509.h>
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#include "crypto/x509.h"
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#include "x509_local.h"
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struct lookup_dir_hashes_st {
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unsigned long hash;
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int suffix;
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};
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struct lookup_dir_entry_st {
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char *dir;
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int dir_type;
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STACK_OF(BY_DIR_HASH) *hashes;
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};
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typedef struct lookup_dir_st {
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BUF_MEM *buffer;
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STACK_OF(BY_DIR_ENTRY) *dirs;
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CRYPTO_RWLOCK *lock;
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} BY_DIR;
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static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
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char **retp);
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static int new_dir(X509_LOOKUP *lu);
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static void free_dir(X509_LOOKUP *lu);
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static int add_cert_dir(BY_DIR *ctx, const char *dir, int type);
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static int get_cert_by_subject(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
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const X509_NAME *name, X509_OBJECT *ret);
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static int get_cert_by_subject_ex(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
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const X509_NAME *name, X509_OBJECT *ret,
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OSSL_LIB_CTX *libctx, const char *propq);
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static X509_LOOKUP_METHOD x509_dir_lookup = {
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"Load certs from files in a directory",
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new_dir, /* new_item */
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free_dir, /* free */
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NULL, /* init */
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NULL, /* shutdown */
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dir_ctrl, /* ctrl */
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get_cert_by_subject, /* get_by_subject */
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NULL, /* get_by_issuer_serial */
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NULL, /* get_by_fingerprint */
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NULL, /* get_by_alias */
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get_cert_by_subject_ex, /* get_by_subject_ex */
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NULL, /* ctrl_ex */
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};
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X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
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{
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return &x509_dir_lookup;
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}
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static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
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char **retp)
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{
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int ret = 0;
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BY_DIR *ld = (BY_DIR *)ctx->method_data;
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switch (cmd) {
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case X509_L_ADD_DIR:
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if (argl == X509_FILETYPE_DEFAULT) {
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const char *dir = ossl_safe_getenv(X509_get_default_cert_dir_env());
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if (dir)
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ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM);
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else
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ret = add_cert_dir(ld, X509_get_default_cert_dir(),
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X509_FILETYPE_PEM);
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if (!ret) {
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ERR_raise(ERR_LIB_X509, X509_R_LOADING_CERT_DIR);
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}
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} else
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ret = add_cert_dir(ld, argp, (int)argl);
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break;
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}
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return ret;
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}
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static int new_dir(X509_LOOKUP *lu)
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{
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BY_DIR *a = OPENSSL_malloc(sizeof(*a));
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if (a == NULL)
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return 0;
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if ((a->buffer = BUF_MEM_new()) == NULL) {
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ERR_raise(ERR_LIB_X509, ERR_R_BN_LIB);
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goto err;
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}
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a->dirs = NULL;
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a->lock = CRYPTO_THREAD_lock_new();
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if (a->lock == NULL) {
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BUF_MEM_free(a->buffer);
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ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
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goto err;
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}
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lu->method_data = a;
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return 1;
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err:
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OPENSSL_free(a);
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return 0;
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}
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static void by_dir_hash_free(BY_DIR_HASH *hash)
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{
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OPENSSL_free(hash);
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}
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static int by_dir_hash_cmp(const BY_DIR_HASH *const *a,
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const BY_DIR_HASH *const *b)
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{
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if ((*a)->hash > (*b)->hash)
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return 1;
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if ((*a)->hash < (*b)->hash)
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return -1;
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return 0;
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}
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static void by_dir_entry_free(BY_DIR_ENTRY *ent)
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{
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OPENSSL_free(ent->dir);
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sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
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OPENSSL_free(ent);
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}
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static void free_dir(X509_LOOKUP *lu)
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{
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BY_DIR *a = (BY_DIR *)lu->method_data;
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sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
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BUF_MEM_free(a->buffer);
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CRYPTO_THREAD_lock_free(a->lock);
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OPENSSL_free(a);
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}
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static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
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{
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int j;
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size_t len;
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const char *s, *ss, *p;
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if (dir == NULL || *dir == '\0') {
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ERR_raise(ERR_LIB_X509, X509_R_INVALID_DIRECTORY);
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return 0;
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}
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s = dir;
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p = s;
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do {
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if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0')) {
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BY_DIR_ENTRY *ent;
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ss = s;
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s = p + 1;
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len = p - ss;
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if (len == 0)
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continue;
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for (j = 0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) {
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ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
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if (strlen(ent->dir) == len && strncmp(ent->dir, ss, len) == 0)
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break;
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}
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if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
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continue;
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if (ctx->dirs == NULL) {
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ctx->dirs = sk_BY_DIR_ENTRY_new_null();
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if (!ctx->dirs) {
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ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
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return 0;
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}
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}
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ent = OPENSSL_malloc(sizeof(*ent));
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if (ent == NULL)
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return 0;
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ent->dir_type = type;
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ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
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ent->dir = OPENSSL_strndup(ss, len);
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if (ent->dir == NULL || ent->hashes == NULL) {
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by_dir_entry_free(ent);
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return 0;
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}
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if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) {
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by_dir_entry_free(ent);
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ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
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return 0;
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}
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}
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} while (*p++ != '\0');
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return 1;
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}
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static int get_cert_by_subject_ex(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
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const X509_NAME *name, X509_OBJECT *ret,
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OSSL_LIB_CTX *libctx, const char *propq)
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{
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BY_DIR *ctx;
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union {
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X509 st_x509;
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X509_CRL crl;
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} data;
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int ok = 0;
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int i, j, k;
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unsigned long h;
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BUF_MEM *b = NULL;
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X509_OBJECT stmp, *tmp;
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const char *postfix = "";
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if (name == NULL)
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return 0;
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stmp.type = type;
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if (type == X509_LU_X509) {
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data.st_x509.cert_info.subject = (X509_NAME *)name; /* won't modify it */
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stmp.data.x509 = &data.st_x509;
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} else if (type == X509_LU_CRL) {
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data.crl.crl.issuer = (X509_NAME *)name; /* won't modify it */
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stmp.data.crl = &data.crl;
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postfix = "r";
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} else {
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ERR_raise(ERR_LIB_X509, X509_R_WRONG_LOOKUP_TYPE);
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goto finish;
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}
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if ((b = BUF_MEM_new()) == NULL) {
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ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
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goto finish;
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}
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ctx = (BY_DIR *)xl->method_data;
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h = X509_NAME_hash_ex(name, libctx, propq, &i);
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if (i == 0)
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goto finish;
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for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) {
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BY_DIR_ENTRY *ent;
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int idx;
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BY_DIR_HASH htmp, *hent;
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ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
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j = strlen(ent->dir) + 1 + 8 + 6 + 1 + 1;
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if (!BUF_MEM_grow(b, j)) {
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ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
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goto finish;
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}
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if (type == X509_LU_CRL && ent->hashes) {
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htmp.hash = h;
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if (!CRYPTO_THREAD_read_lock(ctx->lock))
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goto finish;
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idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
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if (idx >= 0) {
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hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
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k = hent->suffix;
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} else {
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hent = NULL;
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k = 0;
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}
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CRYPTO_THREAD_unlock(ctx->lock);
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} else {
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k = 0;
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hent = NULL;
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}
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for (;;) {
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char c = '/';
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#ifdef OPENSSL_SYS_VMS
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c = ent->dir[strlen(ent->dir) - 1];
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if (c != ':' && c != '>' && c != ']') {
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/*
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* If no separator is present, we assume the directory
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* specifier is a logical name, and add a colon. We really
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* should use better VMS routines for merging things like
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* this, but this will do for now... -- Richard Levitte
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*/
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c = ':';
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} else {
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c = '\0';
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}
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if (c == '\0') {
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/*
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* This is special. When c == '\0', no directory separator
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* should be added.
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*/
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BIO_snprintf(b->data, b->max,
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"%s%08lx.%s%d", ent->dir, h, postfix, k);
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} else
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#endif
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{
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BIO_snprintf(b->data, b->max,
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"%s%c%08lx.%s%d", ent->dir, c, h, postfix, k);
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}
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#ifndef OPENSSL_NO_POSIX_IO
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# ifdef _WIN32
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# define stat _stat
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# endif
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{
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struct stat st;
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if (stat(b->data, &st) < 0)
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break;
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}
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#endif
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/* found one. */
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if (type == X509_LU_X509) {
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if ((X509_load_cert_file_ex(xl, b->data, ent->dir_type, libctx,
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propq)) == 0)
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break;
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} else if (type == X509_LU_CRL) {
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if ((X509_load_crl_file(xl, b->data, ent->dir_type)) == 0)
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break;
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}
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/* else case will caught higher up */
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k++;
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}
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/*
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* we have added it to the cache so now pull it out again
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*
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* Note: quadratic time find here since the objects won't generally be
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* sorted and sorting the would result in O(n^2 log n) complexity.
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*/
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if (k > 0) {
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if (!X509_STORE_lock(xl->store_ctx))
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goto finish;
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j = sk_X509_OBJECT_find(xl->store_ctx->objs, &stmp);
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tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
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X509_STORE_unlock(xl->store_ctx);
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} else {
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tmp = NULL;
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}
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/*
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* If a CRL, update the last file suffix added for this.
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* We don't need to add an entry if k is 0 as this is the initial value.
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* This avoids the need for a write lock and sort operation in the
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* simple case where no CRL is present for a hash.
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*/
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if (type == X509_LU_CRL && k > 0) {
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if (!CRYPTO_THREAD_write_lock(ctx->lock))
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goto finish;
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/*
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* Look for entry again in case another thread added an entry
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* first.
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*/
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if (hent == NULL) {
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htmp.hash = h;
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idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
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hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
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}
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if (hent == NULL) {
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hent = OPENSSL_malloc(sizeof(*hent));
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if (hent == NULL) {
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CRYPTO_THREAD_unlock(ctx->lock);
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ok = 0;
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goto finish;
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}
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hent->hash = h;
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hent->suffix = k;
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if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) {
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CRYPTO_THREAD_unlock(ctx->lock);
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OPENSSL_free(hent);
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ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
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ok = 0;
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goto finish;
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}
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/*
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* Ensure stack is sorted so that subsequent sk_BY_DIR_HASH_find
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* will not mutate the stack and therefore require a write lock.
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*/
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sk_BY_DIR_HASH_sort(ent->hashes);
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} else if (hent->suffix < k) {
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hent->suffix = k;
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}
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CRYPTO_THREAD_unlock(ctx->lock);
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}
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if (tmp != NULL) {
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ok = 1;
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ret->type = tmp->type;
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memcpy(&ret->data, &tmp->data, sizeof(ret->data));
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/*
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* Clear any errors that might have been raised processing empty
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* or malformed files.
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*/
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ERR_clear_error();
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goto finish;
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}
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}
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finish:
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/* If we changed anything, resort the objects for faster lookup */
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if (!sk_X509_OBJECT_is_sorted(xl->store_ctx->objs)) {
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if (X509_STORE_lock(xl->store_ctx)) {
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sk_X509_OBJECT_sort(xl->store_ctx->objs);
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X509_STORE_unlock(xl->store_ctx);
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}
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}
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BUF_MEM_free(b);
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return ok;
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}
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static int get_cert_by_subject(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
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const X509_NAME *name, X509_OBJECT *ret)
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{
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return get_cert_by_subject_ex(xl, type, name, ret, NULL, NULL);
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}
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