480 lines
12 KiB
C
480 lines
12 KiB
C
/* crypto/x509/by_dir.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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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 "cryptlib.h"
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#ifndef NO_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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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/lhash.h>
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#include <openssl/x509.h>
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typedef struct lookup_dir_hashes_st
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{
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unsigned long hash;
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int suffix;
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} BY_DIR_HASH;
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typedef struct lookup_dir_entry_st
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{
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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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} BY_DIR_ENTRY;
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typedef struct lookup_dir_st
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{
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BUF_MEM *buffer;
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STACK_OF(BY_DIR_ENTRY) *dirs;
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} BY_DIR;
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DECLARE_STACK_OF(BY_DIR_HASH)
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DECLARE_STACK_OF(BY_DIR_ENTRY)
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static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
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char **ret);
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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,int type,X509_NAME *name,
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X509_OBJECT *ret);
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X509_LOOKUP_METHOD x509_dir_lookup=
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{
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"Load certs from files in a directory",
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new_dir, /* new */
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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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};
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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;
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char *dir = NULL;
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ld=(BY_DIR *)ctx->method_data;
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switch (cmd)
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{
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case X509_L_ADD_DIR:
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if (argl == X509_FILETYPE_DEFAULT)
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{
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dir=(char *)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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{
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X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
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}
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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;
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if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
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return(0);
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if ((a->buffer=BUF_MEM_new()) == NULL)
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{
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OPENSSL_free(a);
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return(0);
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}
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a->dirs=NULL;
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lu->method_data=(char *)a;
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return(1);
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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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if (ent->dir)
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OPENSSL_free(ent->dir);
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if (ent->hashes)
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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;
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a=(BY_DIR *)lu->method_data;
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if (a->dirs != NULL)
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sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
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if (a->buffer != NULL)
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BUF_MEM_free(a->buffer);
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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,len;
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const char *s,*ss,*p;
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if (dir == NULL || !*dir)
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{
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X509err(X509_F_ADD_CERT_DIR,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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{
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if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
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{
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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=(int)(p-ss);
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if (len == 0) continue;
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for (j=0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++)
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{
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ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
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if (strlen(ent->dir) == (size_t)len &&
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strncmp(ent->dir,ss,(unsigned int)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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{
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ctx->dirs = sk_BY_DIR_ENTRY_new_null();
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if (!ctx->dirs)
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{
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X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY));
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if (!ent)
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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_malloc((unsigned int)len+1);
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if (!ent->dir || !ent->hashes)
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{
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by_dir_entry_free(ent);
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return 0;
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}
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strncpy(ent->dir,ss,(unsigned int)len);
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ent->dir[len] = '\0';
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if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent))
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{
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by_dir_entry_free(ent);
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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(X509_LOOKUP *xl, int type, X509_NAME *name,
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X509_OBJECT *ret)
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{
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BY_DIR *ctx;
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union {
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struct {
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X509 st_x509;
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X509_CINF st_x509_cinf;
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} x509;
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struct {
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X509_CRL st_crl;
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X509_CRL_INFO st_crl_info;
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} 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) return(0);
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stmp.type=type;
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if (type == X509_LU_X509)
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{
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data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
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data.x509.st_x509_cinf.subject=name;
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stmp.data.x509= &data.x509.st_x509;
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postfix="";
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}
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else if (type == X509_LU_CRL)
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{
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data.crl.st_crl.crl= &data.crl.st_crl_info;
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data.crl.st_crl_info.issuer=name;
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stmp.data.crl= &data.crl.st_crl;
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postfix="r";
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}
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else
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{
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X509err(X509_F_GET_CERT_BY_SUBJECT,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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{
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X509err(X509_F_GET_CERT_BY_SUBJECT,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(name);
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for (i=0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++)
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{
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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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{
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X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
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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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{
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htmp.hash = h;
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CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
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idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
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if (idx >= 0)
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{
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hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
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k = hent->suffix;
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}
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else
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{
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hent = NULL;
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k=0;
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}
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CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
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}
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else
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{
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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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{
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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
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directory specifier is a logical name, and
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add a colon. We really should use better
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VMS routines for merging things like this,
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but this will do for now...
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-- Richard Levitte */
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c = ':';
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}
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else
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{
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c = '\0';
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}
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#endif
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if (c == '\0')
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{
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/* This is special. When c == '\0', no
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directory separator should be added. */
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BIO_snprintf(b->data,b->max,
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"%s%08lx.%s%d",ent->dir,h,
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postfix,k);
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}
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else
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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,
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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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{
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if ((X509_load_cert_file(xl,b->data,
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ent->dir_type)) == 0)
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break;
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}
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else if (type == X509_LU_CRL)
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{
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if ((X509_load_crl_file(xl,b->data,
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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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/* we have added it to the cache so now pull
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* it out again */
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CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
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j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
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if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
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else tmp = NULL;
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CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
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/* If a CRL, update the last file suffix added for this */
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if (type == X509_LU_CRL)
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{
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CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
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/* Look for entry again in case another thread added
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* an entry first.
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*/
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if (!hent)
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{
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htmp.hash = h;
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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 =
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sk_BY_DIR_HASH_value(ent->hashes, idx);
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}
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if (!hent)
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{
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hent = OPENSSL_malloc(sizeof(BY_DIR_HASH));
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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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{
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CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
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OPENSSL_free(hent);
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ok = 0;
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goto finish;
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}
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}
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else if (hent->suffix < k)
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hent->suffix = k;
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CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
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}
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if (tmp != NULL)
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{
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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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/* If we were going to up the reference count,
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* we would need to do it on a perl 'type'
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* basis */
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/*- CRYPTO_add(&tmp->data.x509->references,1,
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CRYPTO_LOCK_X509);*/
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goto finish;
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}
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}
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finish:
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if (b != NULL) BUF_MEM_free(b);
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return(ok);
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}
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