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ssl_cert.c

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/*! \file ssl/ssl_cert.c */
/* 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.]
 */
/* ====================================================================
 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */

#include <stdio.h>

#include "e_os.h"
#ifndef NO_SYS_TYPES_H
# include <sys/types.h>
#endif

#if !defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_VMS) && !defined(NeXT) && !defined(MAC_OS_pre_X)
#include <dirent.h>
#endif

#if defined(WIN32)
#include <windows.h>
#include <tchar.h>
#endif

#ifdef NeXT
#include <sys/dir.h>
#define dirent direct
#endif

#include <openssl/objects.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include "ssl_locl.h"
#include <openssl/fips.h>

int SSL_get_ex_data_X509_STORE_CTX_idx(void)
      {
      static volatile int ssl_x509_store_ctx_idx= -1;

      if (ssl_x509_store_ctx_idx < 0)
            {
            /* any write lock will do; usually this branch
             * will only be taken once anyway */
            CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
            
            if (ssl_x509_store_ctx_idx < 0)
                  {
                  ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
                        0,"SSL for verify callback",NULL,NULL,NULL);
                  }
            
            CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
            }
      return ssl_x509_store_ctx_idx;
      }

CERT *ssl_cert_new(void)
      {
      CERT *ret;

      ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
      if (ret == NULL)
            {
            SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
            return(NULL);
            }
      memset(ret,0,sizeof(CERT));

      ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
      ret->references=1;

      return(ret);
      }

CERT *ssl_cert_dup(CERT *cert)
      {
      CERT *ret;
      int i;

      ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
      if (ret == NULL)
            {
            SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
            return(NULL);
            }

      memset(ret, 0, sizeof(CERT));

      ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
      /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
       * if you find that more readable */

      ret->valid = cert->valid;
      ret->mask = cert->mask;
      ret->export_mask = cert->export_mask;

#ifndef OPENSSL_NO_RSA
      if (cert->rsa_tmp != NULL)
            {
            RSA_up_ref(cert->rsa_tmp);
            ret->rsa_tmp = cert->rsa_tmp;
            }
      ret->rsa_tmp_cb = cert->rsa_tmp_cb;
#endif

#ifndef OPENSSL_NO_DH
      if (cert->dh_tmp != NULL)
            {
            /* DH parameters don't have a reference count */
            ret->dh_tmp = DHparams_dup(cert->dh_tmp);
            if (ret->dh_tmp == NULL)
                  {
                  SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
                  goto err;
                  }
            if (cert->dh_tmp->priv_key)
                  {
                  BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
                  if (!b)
                        {
                        SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
                        goto err;
                        }
                  ret->dh_tmp->priv_key = b;
                  }
            if (cert->dh_tmp->pub_key)
                  {
                  BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
                  if (!b)
                        {
                        SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
                        goto err;
                        }
                  ret->dh_tmp->pub_key = b;
                  }
            }
      ret->dh_tmp_cb = cert->dh_tmp_cb;
#endif

      for (i = 0; i < SSL_PKEY_NUM; i++)
            {
            if (cert->pkeys[i].x509 != NULL)
                  {
                  ret->pkeys[i].x509 = cert->pkeys[i].x509;
                  CRYPTO_add(&ret->pkeys[i].x509->references, 1,
                        CRYPTO_LOCK_X509);
                  }
            
            if (cert->pkeys[i].privatekey != NULL)
                  {
                  ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
                  CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
                        CRYPTO_LOCK_EVP_PKEY);

                  switch(i) 
                        {
                        /* If there was anything special to do for
                         * certain types of keys, we'd do it here.
                         * (Nothing at the moment, I think.) */

                  case SSL_PKEY_RSA_ENC:
                  case SSL_PKEY_RSA_SIGN:
                        /* We have an RSA key. */
                        break;
                        
                  case SSL_PKEY_DSA_SIGN:
                        /* We have a DSA key. */
                        break;
                        
                  case SSL_PKEY_DH_RSA:
                  case SSL_PKEY_DH_DSA:
                        /* We have a DH key. */
                        break;
                        
                  default:
                        /* Can't happen. */
                        SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
                        }
                  }
            }
      
      /* ret->extra_certs *should* exist, but currently the own certificate
       * chain is held inside SSL_CTX */

      ret->references=1;

      return(ret);
      
#ifndef OPENSSL_NO_DH /* avoid 'unreferenced label' warning if OPENSSL_NO_DH is defined */
err:
#endif
#ifndef OPENSSL_NO_RSA
      if (ret->rsa_tmp != NULL)
            RSA_free(ret->rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
      if (ret->dh_tmp != NULL)
            DH_free(ret->dh_tmp);
#endif

      for (i = 0; i < SSL_PKEY_NUM; i++)
            {
            if (ret->pkeys[i].x509 != NULL)
                  X509_free(ret->pkeys[i].x509);
            if (ret->pkeys[i].privatekey != NULL)
                  EVP_PKEY_free(ret->pkeys[i].privatekey);
            }

      return NULL;
      }


void ssl_cert_free(CERT *c)
      {
      int i;

      if(c == NULL)
          return;

      i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
#ifdef REF_PRINT
      REF_PRINT("CERT",c);
#endif
      if (i > 0) return;
#ifdef REF_CHECK
      if (i < 0)
            {
            fprintf(stderr,"ssl_cert_free, bad reference count\n");
            abort(); /* ok */
            }
#endif

#ifndef OPENSSL_NO_RSA
      if (c->rsa_tmp) RSA_free(c->rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
      if (c->dh_tmp) DH_free(c->dh_tmp);
#endif

      for (i=0; i<SSL_PKEY_NUM; i++)
            {
            if (c->pkeys[i].x509 != NULL)
                  X509_free(c->pkeys[i].x509);
            if (c->pkeys[i].privatekey != NULL)
                  EVP_PKEY_free(c->pkeys[i].privatekey);
#if 0
            if (c->pkeys[i].publickey != NULL)
                  EVP_PKEY_free(c->pkeys[i].publickey);
#endif
            }
      OPENSSL_free(c);
      }

int ssl_cert_inst(CERT **o)
      {
      /* Create a CERT if there isn't already one
       * (which cannot really happen, as it is initially created in
       * SSL_CTX_new; but the earlier code usually allows for that one
       * being non-existant, so we follow that behaviour, as it might
       * turn out that there actually is a reason for it -- but I'm
       * not sure that *all* of the existing code could cope with
       * s->cert being NULL, otherwise we could do without the
       * initialization in SSL_CTX_new).
       */
      
      if (o == NULL) 
            {
            SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
            return(0);
            }
      if (*o == NULL)
            {
            if ((*o = ssl_cert_new()) == NULL)
                  {
                  SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
                  return(0);
                  }
            }
      return(1);
      }


SESS_CERT *ssl_sess_cert_new(void)
      {
      SESS_CERT *ret;

      ret = OPENSSL_malloc(sizeof *ret);
      if (ret == NULL)
            {
            SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
            return NULL;
            }

      memset(ret, 0 ,sizeof *ret);
      ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
      ret->references = 1;

      return ret;
      }

void ssl_sess_cert_free(SESS_CERT *sc)
      {
      int i;

      if (sc == NULL)
            return;

      i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
#ifdef REF_PRINT
      REF_PRINT("SESS_CERT", sc);
#endif
      if (i > 0)
            return;
#ifdef REF_CHECK
      if (i < 0)
            {
            fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
            abort(); /* ok */
            }
#endif

      /* i == 0 */
      if (sc->cert_chain != NULL)
            sk_X509_pop_free(sc->cert_chain, X509_free);
      for (i = 0; i < SSL_PKEY_NUM; i++)
            {
            if (sc->peer_pkeys[i].x509 != NULL)
                  X509_free(sc->peer_pkeys[i].x509);
#if 0 /* We don't have the peer's private key.  These lines are just
         * here as a reminder that we're still using a not-quite-appropriate
         * data structure. */
            if (sc->peer_pkeys[i].privatekey != NULL)
                  EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
#endif
            }

#ifndef OPENSSL_NO_RSA
      if (sc->peer_rsa_tmp != NULL)
            RSA_free(sc->peer_rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
      if (sc->peer_dh_tmp != NULL)
            DH_free(sc->peer_dh_tmp);
#endif

      OPENSSL_free(sc);
      }

int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
      {
      sc->peer_cert_type = type;
      return(1);
      }

int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
      {
      X509 *x;
      int i;
      X509_STORE_CTX ctx;

      if ((sk == NULL) || (sk_X509_num(sk) == 0))
            return(0);

      x=sk_X509_value(sk,0);
      if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
            {
            SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
            return(0);
            }
      if (SSL_get_verify_depth(s) >= 0)
            X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
      X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);

      /* We need to set the verify purpose. The purpose can be determined by
       * the context: if its a server it will verify SSL client certificates
       * or vice versa.
       */
      if (s->server)
            i = X509_PURPOSE_SSL_CLIENT;
      else
            i = X509_PURPOSE_SSL_SERVER;

      X509_STORE_CTX_purpose_inherit(&ctx, i, s->purpose, s->trust);

      if (s->verify_callback)
            X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);

      if (s->ctx->app_verify_callback != NULL)
#if 1 /* new with OpenSSL 0.9.7 */
            i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
#else
            i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
#endif
      else
            {
#ifndef OPENSSL_NO_X509_VERIFY
# ifdef OPENSSL_FIPS
            if(s->version == TLS1_VERSION)
                  FIPS_allow_md5(1);
# endif
            i=X509_verify_cert(&ctx);
# ifdef OPENSSL_FIPS
            if(s->version == TLS1_VERSION)
                  FIPS_allow_md5(0);
# endif
#else
            i=0;
            ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
            SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
#endif
            }

      s->verify_result=ctx.error;
      X509_STORE_CTX_cleanup(&ctx);

      return(i);
      }

static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
      {
      if (*ca_list != NULL)
            sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);

      *ca_list=name_list;
      }

00526 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
      {
      int i;
      STACK_OF(X509_NAME) *ret;
      X509_NAME *name;

      ret=sk_X509_NAME_new_null();
      for (i=0; i<sk_X509_NAME_num(sk); i++)
            {
            name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
            if ((name == NULL) || !sk_X509_NAME_push(ret,name))
                  {
                  sk_X509_NAME_pop_free(ret,X509_NAME_free);
                  return(NULL);
                  }
            }
      return(ret);
      }

void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
      {
      set_client_CA_list(&(s->client_CA),name_list);
      }

void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
      {
      set_client_CA_list(&(ctx->client_CA),name_list);
      }

STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(SSL_CTX *ctx)
      {
      return(ctx->client_CA);
      }

STACK_OF(X509_NAME) *SSL_get_client_CA_list(SSL *s)
      {
      if (s->type == SSL_ST_CONNECT)
            { /* we are in the client */
            if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
                  (s->s3 != NULL))
                  return(s->s3->tmp.ca_names);
            else
                  return(NULL);
            }
      else
            {
            if (s->client_CA != NULL)
                  return(s->client_CA);
            else
                  return(s->ctx->client_CA);
            }
      }

static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
      {
      X509_NAME *name;

      if (x == NULL) return(0);
      if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
            return(0);
            
      if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
            return(0);

      if (!sk_X509_NAME_push(*sk,name))
            {
            X509_NAME_free(name);
            return(0);
            }
      return(1);
      }

int SSL_add_client_CA(SSL *ssl,X509 *x)
      {
      return(add_client_CA(&(ssl->client_CA),x));
      }

int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
      {
      return(add_client_CA(&(ctx->client_CA),x));
      }

static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
      {
      return(X509_NAME_cmp(*a,*b));
      }

#ifndef OPENSSL_NO_STDIO
/*!
 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 * it doesn't really have anything to do with clients (except that a common use
 * for a stack of CAs is to send it to the client). Actually, it doesn't have
 * much to do with CAs, either, since it will load any old cert.
 * \param file the file containing one or more certs.
 * \return a ::STACK containing the certs.
 */
STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
      {
      BIO *in;
      X509 *x=NULL;
      X509_NAME *xn=NULL;
      STACK_OF(X509_NAME) *ret,*sk;

      ret=sk_X509_NAME_new_null();
      sk=sk_X509_NAME_new(xname_cmp);

      in=BIO_new(BIO_s_file_internal());

      if ((ret == NULL) || (sk == NULL) || (in == NULL))
            {
            SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
            goto err;
            }
      
      if (!BIO_read_filename(in,file))
            goto err;

      for (;;)
            {
            if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
                  break;
            if ((xn=X509_get_subject_name(x)) == NULL) goto err;
            /* check for duplicates */
            xn=X509_NAME_dup(xn);
            if (xn == NULL) goto err;
            if (sk_X509_NAME_find(sk,xn) >= 0)
                  X509_NAME_free(xn);
            else
                  {
                  sk_X509_NAME_push(sk,xn);
                  sk_X509_NAME_push(ret,xn);
                  }
            }

      if (0)
            {
err:
            if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
            ret=NULL;
            }
      if (sk != NULL) sk_X509_NAME_free(sk);
      if (in != NULL) BIO_free(in);
      if (x != NULL) X509_free(x);
      return(ret);
      }
#endif

/*!
 * Add a file of certs to a stack.
 * \param stack the stack to add to.
 * \param file the file to add from. All certs in this file that are not
 * already in the stack will be added.
 * \return 1 for success, 0 for failure. Note that in the case of failure some
 * certs may have been added to \c stack.
 */

00682 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
                              const char *file)
      {
      BIO *in;
      X509 *x=NULL;
      X509_NAME *xn=NULL;
      int ret=1;
      int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
      
      oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
      
      in=BIO_new(BIO_s_file_internal());
      
      if (in == NULL)
            {
            SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
            goto err;
            }
      
      if (!BIO_read_filename(in,file))
            goto err;
      
      for (;;)
            {
            if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
                  break;
            if ((xn=X509_get_subject_name(x)) == NULL) goto err;
            xn=X509_NAME_dup(xn);
            if (xn == NULL) goto err;
            if (sk_X509_NAME_find(stack,xn) >= 0)
                  X509_NAME_free(xn);
            else
                  sk_X509_NAME_push(stack,xn);
            }

      if (0)
            {
err:
            ret=0;
            }
      if(in != NULL)
            BIO_free(in);
      if(x != NULL)
            X509_free(x);
      
      sk_X509_NAME_set_cmp_func(stack,oldcmp);

      return ret;
      }

/*!
 * Add a directory of certs to a stack.
 * \param stack the stack to append to.
 * \param dir the directory to append from. All files in this directory will be
 * examined as potential certs. Any that are acceptable to
 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
 * included.
 * \return 1 for success, 0 for failure. Note that in the case of failure some
 * certs may have been added to \c stack.
 */

#ifndef OPENSSL_SYS_WIN32
#ifndef OPENSSL_SYS_VMS       /* XXXX This may be fixed in the future */
#ifndef OPENSSL_SYS_MACINTOSH_CLASSIC /* XXXXX: Better scheme needed! */

00747 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
                               const char *dir)
      {
      DIR *d;
      struct dirent *dstruct;
      int ret = 0;

      CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
      d = opendir(dir);

      /* Note that a side effect is that the CAs will be sorted by name */
      if(!d)
            {
            SYSerr(SYS_F_OPENDIR, get_last_sys_error());
            ERR_add_error_data(3, "opendir('", dir, "')");
            SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
            goto err;
            }
      
      while((dstruct=readdir(d)))
            {
            char buf[1024];
            int r;
            
            if(strlen(dir)+strlen(dstruct->d_name)+2 > sizeof buf)
                  {
                  SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
                  goto err;
                  }
            
            r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,dstruct->d_name);
            if (r <= 0 || r >= sizeof buf)
                  goto err;
            if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
                  goto err;
            }
      ret = 1;

err:  
      if (d) closedir(d);
      CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
      return ret;
      }

#endif
#endif

#else /* OPENSSL_SYS_WIN32 */

#if defined(_WIN32_WCE)
# ifndef UNICODE
#  error "WinCE comes in UNICODE flavor only..."
# endif
# if _WIN32_WCE<101 && !defined(OPENSSL_NO_MULTIBYTE)
#  define OPENSSL_NO_MULTIBYTE
# endif
# ifndef  FindFirstFile
#  define FindFirstFile FindFirstFileW
# endif
# ifndef  FindNextFile
#  define FindNextFile FindNextFileW
# endif
#endif

int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
                               const char *dir)
      {
      WIN32_FIND_DATA FindFileData;
      HANDLE hFind;
      int    ret = 0;
      TCHAR *wdir = NULL;
      size_t i,len_0 = strlen(dir)+1;     /* len_0 accounts for trailing 0 */
      char   buf[1024],*slash;

      if (len_0 > (sizeof(buf)-14)) /* 14 is just some value... */
            {
            SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
            return ret;
            }

      CRYPTO_w_lock(CRYPTO_LOCK_READDIR);

      if (sizeof(TCHAR) != sizeof(char))
            {
            wdir = (TCHAR *)malloc(len_0*sizeof(TCHAR));
            if (wdir == NULL)
                  goto err_noclose;
#ifndef OPENSSL_NO_MULTIBYTE
            if (!MultiByteToWideChar(CP_ACP,0,dir,len_0,
                              (WCHAR *)wdir,len_0))
#endif
                  for (i=0;i<len_0;i++) wdir[i]=(TCHAR)dir[i];

            hFind = FindFirstFile(wdir, &FindFileData);
            }
      else  hFind = FindFirstFile((const TCHAR *)dir, &FindFileData);

      /* Note that a side effect is that the CAs will be sorted by name */
      if(hFind == INVALID_HANDLE_VALUE)
            {
            SYSerr(SYS_F_OPENDIR, get_last_sys_error());
            ERR_add_error_data(3, "opendir('", dir, "')");
            SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
            goto err_noclose;
            }

      strncpy(buf,dir,sizeof(buf)); /* strcpy is safe too... */
      buf[len_0-1]='/';       /* no trailing zero!     */
      slash=buf+len_0;

      do    {
            const TCHAR *fnam=FindFileData.cFileName;
            size_t flen_0=_tcslen(fnam)+1;

            if (flen_0 > (sizeof(buf)-len_0))
                  {
                  SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
                  goto err;
                  }
            /* else strcpy would be safe too... */

            if (sizeof(TCHAR) != sizeof(char))
                  {
#ifndef OPENSSL_NO_MULTIBYTE
                  if (!WideCharToMultiByte(CP_ACP,0,
                                    (WCHAR *)fnam,flen_0,
                                    slash,sizeof(buf)-len_0,
                                    NULL,0))
#endif
                        for (i=0;i<flen_0;i++) slash[i]=(char)fnam[i];
                  }
            else  strncpy(slash,(const char *)fnam,sizeof(buf)-len_0);

            if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
                  goto err;
            }
      while (FindNextFile(hFind, &FindFileData) != FALSE);
      ret = 1;

err:  
      FindClose(hFind);
err_noclose:
      if (wdir != NULL)
            free(wdir);

      CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
      return ret;
      }

#endif

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