aboutsummaryrefslogtreecommitdiffstats
path: root/crypto/conf/conf_lib.c
blob: 0b7dd26d63b0a0de3f9dbc826409fa96641ea612 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
/*
 * Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include "e_os.h"
#include <stdio.h>
#include <string.h>
#include "internal/conf.h"
#include "crypto/ctype.h"
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/conf.h>
#include <openssl/conf_api.h>
#include <openssl/lhash.h>

static CONF_METHOD *default_CONF_method = NULL;

/* Init a 'CONF' structure from an old LHASH */

void CONF_set_nconf(CONF *conf, LHASH_OF(CONF_VALUE) *hash)
{
    if (default_CONF_method == NULL)
        default_CONF_method = NCONF_default();

    default_CONF_method->init(conf);
    conf->data = hash;
}

/*
 * The following section contains the "CONF classic" functions, rewritten in
 * terms of the new CONF interface.
 */

int CONF_set_default_method(CONF_METHOD *meth)
{
    default_CONF_method = meth;
    return 1;
}

LHASH_OF(CONF_VALUE) *CONF_load(LHASH_OF(CONF_VALUE) *conf, const char *file,
                                long *eline)
{
    LHASH_OF(CONF_VALUE) *ltmp;
    BIO *in = NULL;

#ifdef OPENSSL_SYS_VMS
    in = BIO_new_file(file, "r");
#else
    in = BIO_new_file(file, "rb");
#endif
    if (in == NULL) {
        CONFerr(CONF_F_CONF_LOAD, ERR_R_SYS_LIB);
        return NULL;
    }

    ltmp = CONF_load_bio(conf, in, eline);
    BIO_free(in);

    return ltmp;
}

#ifndef OPENSSL_NO_STDIO
LHASH_OF(CONF_VALUE) *CONF_load_fp(LHASH_OF(CONF_VALUE) *conf, FILE *fp,
                                   long *eline)
{
    BIO *btmp;
    LHASH_OF(CONF_VALUE) *ltmp;
    if ((btmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
        CONFerr(CONF_F_CONF_LOAD_FP, ERR_R_BUF_LIB);
        return NULL;
    }
    ltmp = CONF_load_bio(conf, btmp, eline);
    BIO_free(btmp);
    return ltmp;
}
#endif

LHASH_OF(CONF_VALUE) *CONF_load_bio(LHASH_OF(CONF_VALUE) *conf, BIO *bp,
                                    long *eline)
{
    CONF ctmp;
    int ret;

    CONF_set_nconf(&ctmp, conf);

    ret = NCONF_load_bio(&ctmp, bp, eline);
    if (ret)
        return ctmp.data;
    return NULL;
}

STACK_OF(CONF_VALUE) *CONF_get_section(LHASH_OF(CONF_VALUE) *conf,
                                       const char *section)
{
    if (conf == NULL) {
        return NULL;
    } else {
        CONF ctmp;
        CONF_set_nconf(&ctmp, conf);
        return NCONF_get_section(&ctmp, section);
    }
}

char *CONF_get_string(LHASH_OF(CONF_VALUE) *conf, const char *group,
                      const char *name)
{
    if (conf == NULL) {
        return NCONF_get_string(NULL, group, name);
    } else {
        CONF ctmp;
        CONF_set_nconf(&ctmp, conf);
        return NCONF_get_string(&ctmp, group, name);
    }
}

long CONF_get_number(LHASH_OF(CONF_VALUE) *conf, const char *group,
                     const char *name)
{
    int status;
    long result = 0;

    ERR_set_mark();
    if (conf == NULL) {
        status = NCONF_get_number_e(NULL, group, name, &result);
    } else {
        CONF ctmp;
        CONF_set_nconf(&ctmp, conf);
        status = NCONF_get_number_e(&ctmp, group, name, &result);
    }
    ERR_pop_to_mark();
    return status == 0 ? 0L : result;
}

void CONF_free(LHASH_OF(CONF_VALUE) *conf)
{
    CONF ctmp;
    CONF_set_nconf(&ctmp, conf);
    NCONF_free_data(&ctmp);
}

#ifndef OPENSSL_NO_STDIO
int CONF_dump_fp(LHASH_OF(CONF_VALUE) *conf, FILE *out)
{
    BIO *btmp;
    int ret;

    if ((btmp = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
        CONFerr(CONF_F_CONF_DUMP_FP, ERR_R_BUF_LIB);
        return 0;
    }
    ret = CONF_dump_bio(conf, btmp);
    BIO_free(btmp);
    return ret;
}
#endif

int CONF_dump_bio(LHASH_OF(CONF_VALUE) *conf, BIO *out)
{
    CONF ctmp;
    CONF_set_nconf(&ctmp, conf);
    return NCONF_dump_bio(&ctmp, out);
}

/*
 * The following section contains the "New CONF" functions.  They are
 * completely centralised around a new CONF structure that may contain
 * basically anything, but at least a method pointer and a table of data.
 * These functions are also written in terms of the bridge functions used by
 * the "CONF classic" functions, for consistency.
 */

CONF *NCONF_new(CONF_METHOD *meth)
{
    CONF *ret;

    if (meth == NULL)
        meth = NCONF_default();

    ret = meth->create(meth);
    if (ret == NULL) {
        CONFerr(CONF_F_NCONF_NEW, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    return ret;
}

void NCONF_free(CONF *conf)
{
    if (conf == NULL)
        return;
    conf->meth->destroy(conf);
}

void NCONF_free_data(CONF *conf)
{
    if (conf == NULL)
        return;
    conf->meth->destroy_data(conf);
}

int NCONF_load(CONF *conf, const char *file, long *eline)
{
    if (conf == NULL) {
        CONFerr(CONF_F_NCONF_LOAD, CONF_R_NO_CONF);
        return 0;
    }

    return conf->meth->load(conf, file, eline);
}

#ifndef OPENSSL_NO_STDIO
int NCONF_load_fp(CONF *conf, FILE *fp, long *eline)
{
    BIO *btmp;
    int ret;
    if ((btmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
        CONFerr(CONF_F_NCONF_LOAD_FP, ERR_R_BUF_LIB);
        return 0;
    }
    ret = NCONF_load_bio(conf, btmp, eline);
    BIO_free(btmp);
    return ret;
}
#endif

int NCONF_load_bio(CONF *conf, BIO *bp, long *eline)
{
    if (conf == NULL) {
        CONFerr(CONF_F_NCONF_LOAD_BIO, CONF_R_NO_CONF);
        return 0;
    }

    return conf->meth->load_bio(conf, bp, eline);
}

STACK_OF(CONF_VALUE) *NCONF_get_section(const CONF *conf, const char *section)
{
    if (conf == NULL) {
        CONFerr(CONF_F_NCONF_GET_SECTION, CONF_R_NO_CONF);
        return NULL;
    }

    if (section == NULL) {
        CONFerr(CONF_F_NCONF_GET_SECTION, CONF_R_NO_SECTION);
        return NULL;
    }

    return _CONF_get_section_values(conf, section);
}

char *NCONF_get_string(const CONF *conf, const char *group, const char *name)
{
    char *s = _CONF_get_string(conf, group, name);

    /*
     * Since we may get a value from an environment variable even if conf is
     * NULL, let's check the value first
     */
    if (s)
        return s;

    if (conf == NULL) {
        CONFerr(CONF_F_NCONF_GET_STRING,
                CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
        return NULL;
    }
    CONFerr(CONF_F_NCONF_GET_STRING, CONF_R_NO_VALUE);
    ERR_add_error_data(4, "group=", group, " name=", name);
    return NULL;
}

static int default_is_number(const CONF *conf, char c)
{
    return ossl_isdigit(c);
}

static int default_to_int(const CONF *conf, char c)
{
    return (int)(c - '0');
}

int NCONF_get_number_e(const CONF *conf, const char *group, const char *name,
                       long *result)
{
    char *str;
    long res;
    int (*is_number)(const CONF *, char) = &default_is_number;
    int (*to_int)(const CONF *, char) = &default_to_int;

    if (result == NULL) {
        CONFerr(CONF_F_NCONF_GET_NUMBER_E, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }

    str = NCONF_get_string(conf, group, name);

    if (str == NULL)
        return 0;

    if (conf != NULL) {
        if (conf->meth->is_number != NULL)
            is_number = conf->meth->is_number;
        if (conf->meth->to_int != NULL)
            to_int = conf->meth->to_int;
    }
    for (res = 0; is_number(conf, *str); str++) {
        const int d = to_int(conf, *str);

        if (res > (LONG_MAX - d) / 10L) {
            CONFerr(CONF_F_NCONF_GET_NUMBER_E, CONF_R_NUMBER_TOO_LARGE);
            return 0;
        }
        res = res * 10 + d;
    }

    *result = res;
    return 1;
}

#ifndef OPENSSL_NO_STDIO
int NCONF_dump_fp(const CONF *conf, FILE *out)
{
    BIO *btmp;
    int ret;
    if ((btmp = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
        CONFerr(CONF_F_NCONF_DUMP_FP, ERR_R_BUF_LIB);
        return 0;
    }
    ret = NCONF_dump_bio(conf, btmp);
    BIO_free(btmp);
    return ret;
}
#endif

int NCONF_dump_bio(const CONF *conf, BIO *out)
{
    if (conf == NULL) {
        CONFerr(CONF_F_NCONF_DUMP_BIO, CONF_R_NO_CONF);
        return 0;
    }

    return conf->meth->dump(conf, out);
}

/*
 * These routines call the C malloc/free, to avoid intermixing with
 * OpenSSL function pointers before the library is initialized.
 */
OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void)
{
    OPENSSL_INIT_SETTINGS *ret = malloc(sizeof(*ret));

    if (ret != NULL)
        memset(ret, 0, sizeof(*ret));
    ret->flags = DEFAULT_CONF_MFLAGS;

    return ret;
}


#ifndef OPENSSL_NO_STDIO
int OPENSSL_INIT_set_config_filename(OPENSSL_INIT_SETTINGS *settings,
                                     const char *filename)
{
    char *newfilename = NULL;

    if (filename != NULL) {
        newfilename = strdup(filename);
        if (newfilename == NULL)
            return 0;
    }

    free(settings->filename);
    settings->filename = newfilename;

    return 1;
}

void OPENSSL_INIT_set_config_file_flags(OPENSSL_INIT_SETTINGS *settings,
                                        unsigned long flags)
{
    settings->flags = flags;
}

int OPENSSL_INIT_set_config_appname(OPENSSL_INIT_SETTINGS *settings,
                                    const char *appname)
{
    char *newappname = NULL;

    if (appname != NULL) {
        newappname = strdup(appname);
        if (newappname == NULL)
            return 0;
    }

    free(settings->appname);
    settings->appname = newappname;

    return 1;
}
#endif

void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings)
{
    free(settings->filename);
    free(settings->appname);
    free(settings);
}