441 lines
14 KiB
C
441 lines
14 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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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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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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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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"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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case X509_L_ADD_DIR:
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if (argl == X509_FILETYPE_DEFAULT) {
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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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X509err(X509_F_DIR_CTRL, 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;
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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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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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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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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 = (int)(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) == (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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ctx->dirs = sk_BY_DIR_ENTRY_new_null();
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if (!ctx->dirs) {
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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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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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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)
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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.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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} else if (type == X509_LU_CRL) {
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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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} else {
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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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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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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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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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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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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_r_unlock(CRYPTO_LOCK_X509_STORE);
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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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#endif
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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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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(xl, b->data, ent->dir_type)) == 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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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)
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tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
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else
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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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CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
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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) {
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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 = sk_BY_DIR_HASH_value(ent->hashes, idx);
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}
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if (!hent) {
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hent = OPENSSL_malloc(sizeof(BY_DIR_HASH));
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if (hent == NULL) {
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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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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_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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} 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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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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* If we were going to up the reference count, we would need to
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* do it on a perl 'type' basis
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*/
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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)
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BUF_MEM_free(b);
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return (ok);
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}
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