by_dir.c revision 296465 
1/* crypto/x509/by_dir.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <time.h>
61#include <errno.h>
62
63#include "cryptlib.h"
64
65#ifndef NO_SYS_TYPES_H
66# include <sys/types.h>
67#endif
68#ifdef MAC_OS_pre_X
69# include <stat.h>
70#else
71# include <sys/stat.h>
72#endif
73
74#include <openssl/lhash.h>
75#include <openssl/x509.h>
76
77#ifdef _WIN32
78# define stat    _stat
79#endif
80
81typedef struct lookup_dir_st {
82    BUF_MEM *buffer;
83    int num_dirs;
84    char **dirs;
85    int *dirs_type;
86    int num_dirs_alloced;
87} BY_DIR;
88
89static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
90                    char **ret);
91static int new_dir(X509_LOOKUP *lu);
92static void free_dir(X509_LOOKUP *lu);
93static int add_cert_dir(BY_DIR *ctx, const char *dir, int type);
94static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
95                               X509_OBJECT *ret);
96X509_LOOKUP_METHOD x509_dir_lookup = {
97    "Load certs from files in a directory",
98    new_dir,                    /* new */
99    free_dir,                   /* free */
100    NULL,                       /* init */
101    NULL,                       /* shutdown */
102    dir_ctrl,                   /* ctrl */
103    get_cert_by_subject,        /* get_by_subject */
104    NULL,                       /* get_by_issuer_serial */
105    NULL,                       /* get_by_fingerprint */
106    NULL,                       /* get_by_alias */
107};
108
109X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
110{
111    return (&x509_dir_lookup);
112}
113
114static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
115                    char **retp)
116{
117    int ret = 0;
118    BY_DIR *ld;
119    char *dir = NULL;
120
121    ld = (BY_DIR *)ctx->method_data;
122
123    switch (cmd) {
124    case X509_L_ADD_DIR:
125        if (argl == X509_FILETYPE_DEFAULT) {
126            dir = (char *)Getenv(X509_get_default_cert_dir_env());
127            if (dir)
128                ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM);
129            else
130                ret = add_cert_dir(ld, X509_get_default_cert_dir(),
131                                   X509_FILETYPE_PEM);
132            if (!ret) {
133                X509err(X509_F_DIR_CTRL, X509_R_LOADING_CERT_DIR);
134            }
135        } else
136            ret = add_cert_dir(ld, argp, (int)argl);
137        break;
138    }
139    return (ret);
140}
141
142static int new_dir(X509_LOOKUP *lu)
143{
144    BY_DIR *a;
145
146    if ((a = (BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
147        return (0);
148    if ((a->buffer = BUF_MEM_new()) == NULL) {
149        OPENSSL_free(a);
150        return (0);
151    }
152    a->num_dirs = 0;
153    a->dirs = NULL;
154    a->dirs_type = NULL;
155    a->num_dirs_alloced = 0;
156    lu->method_data = (char *)a;
157    return (1);
158}
159
160static void free_dir(X509_LOOKUP *lu)
161{
162    BY_DIR *a;
163    int i;
164
165    a = (BY_DIR *)lu->method_data;
166    for (i = 0; i < a->num_dirs; i++)
167        if (a->dirs[i] != NULL)
168            OPENSSL_free(a->dirs[i]);
169    if (a->dirs != NULL)
170        OPENSSL_free(a->dirs);
171    if (a->dirs_type != NULL)
172        OPENSSL_free(a->dirs_type);
173    if (a->buffer != NULL)
174        BUF_MEM_free(a->buffer);
175    OPENSSL_free(a);
176}
177
178static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
179{
180    int j, len;
181    int *ip;
182    const char *s, *ss, *p;
183    char **pp;
184
185    if (dir == NULL || !*dir) {
186        X509err(X509_F_ADD_CERT_DIR, X509_R_INVALID_DIRECTORY);
187        return 0;
188    }
189
190    s = dir;
191    p = s;
192    for (;; p++) {
193        if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0')) {
194            ss = s;
195            s = p + 1;
196            len = (int)(p - ss);
197            if (len == 0)
198                continue;
199            for (j = 0; j < ctx->num_dirs; j++)
200                if (strlen(ctx->dirs[j]) == (size_t)len &&
201                    strncmp(ctx->dirs[j], ss, (unsigned int)len) == 0)
202                    break;
203            if (j < ctx->num_dirs)
204                continue;
205            if (ctx->num_dirs_alloced < (ctx->num_dirs + 1)) {
206                ctx->num_dirs_alloced += 10;
207                pp = (char **)OPENSSL_malloc(ctx->num_dirs_alloced *
208                                             sizeof(char *));
209                ip = (int *)OPENSSL_malloc(ctx->num_dirs_alloced *
210                                           sizeof(int));
211                if ((pp == NULL) || (ip == NULL)) {
212                    X509err(X509_F_ADD_CERT_DIR, ERR_R_MALLOC_FAILURE);
213                    return (0);
214                }
215                memcpy(pp, ctx->dirs, (ctx->num_dirs_alloced - 10) *
216                       sizeof(char *));
217                memcpy(ip, ctx->dirs_type, (ctx->num_dirs_alloced - 10) *
218                       sizeof(int));
219                if (ctx->dirs != NULL)
220                    OPENSSL_free(ctx->dirs);
221                if (ctx->dirs_type != NULL)
222                    OPENSSL_free(ctx->dirs_type);
223                ctx->dirs = pp;
224                ctx->dirs_type = ip;
225            }
226            ctx->dirs_type[ctx->num_dirs] = type;
227            ctx->dirs[ctx->num_dirs] =
228                (char *)OPENSSL_malloc((unsigned int)len + 1);
229            if (ctx->dirs[ctx->num_dirs] == NULL)
230                return (0);
231            strncpy(ctx->dirs[ctx->num_dirs], ss, (unsigned int)len);
232            ctx->dirs[ctx->num_dirs][len] = '\0';
233            ctx->num_dirs++;
234        }
235        if (*p == '\0')
236            break;
237    }
238    return (1);
239}
240
241static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
242                               X509_OBJECT *ret)
243{
244    BY_DIR *ctx;
245    union {
246        struct {
247            X509 st_x509;
248            X509_CINF st_x509_cinf;
249        } x509;
250        struct {
251            X509_CRL st_crl;
252            X509_CRL_INFO st_crl_info;
253        } crl;
254    } data;
255    int ok = 0;
256    int i, j, k;
257    unsigned long h;
258    BUF_MEM *b = NULL;
259    struct stat st;
260    X509_OBJECT stmp, *tmp;
261    const char *postfix = "";
262
263    if (name == NULL)
264        return (0);
265
266    stmp.type = type;
267    if (type == X509_LU_X509) {
268        data.x509.st_x509.cert_info = &data.x509.st_x509_cinf;
269        data.x509.st_x509_cinf.subject = name;
270        stmp.data.x509 = &data.x509.st_x509;
271        postfix = "";
272    } else if (type == X509_LU_CRL) {
273        data.crl.st_crl.crl = &data.crl.st_crl_info;
274        data.crl.st_crl_info.issuer = name;
275        stmp.data.crl = &data.crl.st_crl;
276        postfix = "r";
277    } else {
278        X509err(X509_F_GET_CERT_BY_SUBJECT, X509_R_WRONG_LOOKUP_TYPE);
279        goto finish;
280    }
281
282    if ((b = BUF_MEM_new()) == NULL) {
283        X509err(X509_F_GET_CERT_BY_SUBJECT, ERR_R_BUF_LIB);
284        goto finish;
285    }
286
287    ctx = (BY_DIR *)xl->method_data;
288
289    h = X509_NAME_hash(name);
290    for (i = 0; i < ctx->num_dirs; i++) {
291        j = strlen(ctx->dirs[i]) + 1 + 8 + 6 + 1 + 1;
292        if (!BUF_MEM_grow(b, j)) {
293            X509err(X509_F_GET_CERT_BY_SUBJECT, ERR_R_MALLOC_FAILURE);
294            goto finish;
295        }
296        k = 0;
297        for (;;) {
298            char c = '/';
299#ifdef OPENSSL_SYS_VMS
300            c = ctx->dirs[i][strlen(ctx->dirs[i]) - 1];
301            if (c != ':' && c != '>' && c != ']') {
302                /*
303                 * If no separator is present, we assume the directory
304                 * specifier is a logical name, and add a colon.  We really
305                 * should use better VMS routines for merging things like
306                 * this, but this will do for now... -- Richard Levitte
307                 */
308                c = ':';
309            } else {
310                c = '\0';
311            }
312#endif
313            if (c == '\0') {
314                /*
315                 * This is special.  When c == '\0', no directory separator
316                 * should be added.
317                 */
318                BIO_snprintf(b->data, b->max,
319                             "%s%08lx.%s%d", ctx->dirs[i], h, postfix, k);
320            } else {
321                BIO_snprintf(b->data, b->max,
322                             "%s%c%08lx.%s%d", ctx->dirs[i], c, h,
323                             postfix, k);
324            }
325            k++;
326            if (stat(b->data, &st) < 0)
327                break;
328            /* found one. */
329            if (type == X509_LU_X509) {
330                if ((X509_load_cert_file(xl, b->data,
331                                         ctx->dirs_type[i])) == 0)
332                    break;
333            } else if (type == X509_LU_CRL) {
334                if ((X509_load_crl_file(xl, b->data, ctx->dirs_type[i])) == 0)
335                    break;
336            }
337            /* else case will caught higher up */
338        }
339
340        /*
341         * we have added it to the cache so now pull it out again
342         */
343        CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
344        j = sk_X509_OBJECT_find(xl->store_ctx->objs, &stmp);
345        if (j != -1)
346            tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
347        else
348            tmp = NULL;
349        CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
350
351        if (tmp != NULL) {
352            ok = 1;
353            ret->type = tmp->type;
354            memcpy(&ret->data, &tmp->data, sizeof(ret->data));
355            /*
356             * If we were going to up the reference count, we would need to
357             * do it on a perl 'type' basis
358             */
359        /*- CRYPTO_add(&tmp->data.x509->references,1,
360                    CRYPTO_LOCK_X509);*/
361            goto finish;
362        }
363    }
364 finish:
365    if (b != NULL)
366        BUF_MEM_free(b);
367    return (ok);
368}
369