summaryrefslogtreecommitdiffstats
path: root/crypto/engine/eng_cnf.c
blob: 6f0a066d06d1cf6e3859a2c5dbf32346dc1f66e3 (plain)
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
/*
 * Copyright 2002-2016 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 "eng_int.h"
#include <openssl/conf.h>

/* #define ENGINE_CONF_DEBUG */

/* ENGINE config module */

static const char *skip_dot(const char *name)
{
    const char *p = strchr(name, '.');

    if (p != NULL)
        return p + 1;
    return name;
}

static STACK_OF(ENGINE) *initialized_engines = NULL;

static int int_engine_init(ENGINE *e)
{
    if (!ENGINE_init(e))
        return 0;
    if (!initialized_engines)
        initialized_engines = sk_ENGINE_new_null();
    if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e)) {
        ENGINE_finish(e);
        return 0;
    }
    return 1;
}

static int int_engine_configure(const char *name, const char *value, const CONF *cnf)
{
    int i;
    int ret = 0;
    long do_init = -1;
    STACK_OF(CONF_VALUE) *ecmds;
    CONF_VALUE *ecmd = NULL;
    const char *ctrlname, *ctrlvalue;
    ENGINE *e = NULL;
    int soft = 0;

    name = skip_dot(name);
#ifdef ENGINE_CONF_DEBUG
    fprintf(stderr, "Configuring engine %s\n", name);
#endif
    /* Value is a section containing ENGINE commands */
    ecmds = NCONF_get_section(cnf, value);

    if (!ecmds) {
        ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
                  ENGINE_R_ENGINE_SECTION_ERROR);
        return 0;
    }

    for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++) {
        ecmd = sk_CONF_VALUE_value(ecmds, i);
        ctrlname = skip_dot(ecmd->name);
        ctrlvalue = ecmd->value;
#ifdef ENGINE_CONF_DEBUG
        fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname,
                ctrlvalue);
#endif

        /* First handle some special pseudo ctrls */

        /* Override engine name to use */
        if (strcmp(ctrlname, "engine_id") == 0)
            name = ctrlvalue;
        else if (strcmp(ctrlname, "soft_load") == 0)
            soft = 1;
        /* Load a dynamic ENGINE */
        else if (strcmp(ctrlname, "dynamic_path") == 0) {
            e = ENGINE_by_id("dynamic");
            if (!e)
                goto err;
            if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
                goto err;
            if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
                goto err;
            if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
                goto err;
        }
        /* ... add other pseudos here ... */
        else {
            /*
             * At this point we need an ENGINE structural reference if we
             * don't already have one.
             */
            if (!e) {
                e = ENGINE_by_id(name);
                if (!e && soft) {
                    ERR_clear_error();
                    return 1;
                }
                if (!e)
                    goto err;
            }
            /*
             * Allow "EMPTY" to mean no value: this allows a valid "value" to
             * be passed to ctrls of type NO_INPUT
             */
            if (strcmp(ctrlvalue, "EMPTY") == 0)
                ctrlvalue = NULL;
            if (strcmp(ctrlname, "init") == 0) {
                if (!NCONF_get_number_e(cnf, value, "init", &do_init))
                    goto err;
                if (do_init == 1) {
                    if (!int_engine_init(e))
                        goto err;
                } else if (do_init != 0) {
                    ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
                              ENGINE_R_INVALID_INIT_VALUE);
                    goto err;
                }
            } else if (strcmp(ctrlname, "default_algorithms") == 0) {
                if (!ENGINE_set_default_string(e, ctrlvalue))
                    goto err;
            } else if (!ENGINE_ctrl_cmd_string(e, ctrlname, ctrlvalue, 0))
                goto err;
        }

    }
    if (e && (do_init == -1) && !int_engine_init(e)) {
        ecmd = NULL;
        goto err;
    }
    ret = 1;
 err:
    if (ret != 1) {
        ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
                  ENGINE_R_ENGINE_CONFIGURATION_ERROR);
        if (ecmd)
            ERR_add_error_data(6, "section=", ecmd->section,
                               ", name=", ecmd->name,
                               ", value=", ecmd->value);
    }
    ENGINE_free(e);
    return ret;
}

static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
{
    STACK_OF(CONF_VALUE) *elist;
    CONF_VALUE *cval;
    int i;
#ifdef ENGINE_CONF_DEBUG
    fprintf(stderr, "Called engine module: name %s, value %s\n",
            CONF_imodule_get_name(md), CONF_imodule_get_value(md));
#endif
    /* Value is a section containing ENGINEs to configure */
    elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));

    if (!elist) {
        ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT,
                  ENGINE_R_ENGINES_SECTION_ERROR);
        return 0;
    }

    for (i = 0; i < sk_CONF_VALUE_num(elist); i++) {
        cval = sk_CONF_VALUE_value(elist, i);
        if (!int_engine_configure(cval->name, cval->value, cnf))
            return 0;
    }

    return 1;
}

static void int_engine_module_finish(CONF_IMODULE *md)
{
    ENGINE *e;

    while ((e = sk_ENGINE_pop(initialized_engines)))
        ENGINE_finish(e);
    sk_ENGINE_free(initialized_engines);
    initialized_engines = NULL;
}

void ENGINE_add_conf_module(void)
{
    CONF_module_add("engines",
                    int_engine_module_init, int_engine_module_finish);
}