names.c revision 296341 
1/* crypto/evp/names.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 "cryptlib.h"
61#include <openssl/evp.h>
62#include <openssl/objects.h>
63#include <openssl/x509.h>
64
65int EVP_add_cipher(const EVP_CIPHER *c)
66{
67    int r;
68
69    if (c == NULL)
70        return 0;
71
72    OPENSSL_init();
73
74    r = OBJ_NAME_add(OBJ_nid2sn(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
75                     (const char *)c);
76    if (r == 0)
77        return (0);
78    check_defer(c->nid);
79    r = OBJ_NAME_add(OBJ_nid2ln(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
80                     (const char *)c);
81    return (r);
82}
83
84int EVP_add_digest(const EVP_MD *md)
85{
86    int r;
87    const char *name;
88    OPENSSL_init();
89
90    name = OBJ_nid2sn(md->type);
91    r = OBJ_NAME_add(name, OBJ_NAME_TYPE_MD_METH, (const char *)md);
92    if (r == 0)
93        return (0);
94    check_defer(md->type);
95    r = OBJ_NAME_add(OBJ_nid2ln(md->type), OBJ_NAME_TYPE_MD_METH,
96                     (const char *)md);
97    if (r == 0)
98        return (0);
99
100    if (md->pkey_type && md->type != md->pkey_type) {
101        r = OBJ_NAME_add(OBJ_nid2sn(md->pkey_type),
102                         OBJ_NAME_TYPE_MD_METH | OBJ_NAME_ALIAS, name);
103        if (r == 0)
104            return (0);
105        check_defer(md->pkey_type);
106        r = OBJ_NAME_add(OBJ_nid2ln(md->pkey_type),
107                         OBJ_NAME_TYPE_MD_METH | OBJ_NAME_ALIAS, name);
108    }
109    return (r);
110}
111
112const EVP_CIPHER *EVP_get_cipherbyname(const char *name)
113{
114    const EVP_CIPHER *cp;
115
116    cp = (const EVP_CIPHER *)OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
117    return (cp);
118}
119
120const EVP_MD *EVP_get_digestbyname(const char *name)
121{
122    const EVP_MD *cp;
123
124    cp = (const EVP_MD *)OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
125    return (cp);
126}
127
128void EVP_cleanup(void)
129{
130    OBJ_NAME_cleanup(OBJ_NAME_TYPE_CIPHER_METH);
131    OBJ_NAME_cleanup(OBJ_NAME_TYPE_MD_METH);
132    /*
133     * The above calls will only clean out the contents of the name hash
134     * table, but not the hash table itself.  The following line does that
135     * part.  -- Richard Levitte
136     */
137    OBJ_NAME_cleanup(-1);
138
139    EVP_PBE_cleanup();
140    if (obj_cleanup_defer == 2) {
141        obj_cleanup_defer = 0;
142        OBJ_cleanup();
143    }
144    OBJ_sigid_free();
145}
146
147struct doall_cipher {
148    void *arg;
149    void (*fn) (const EVP_CIPHER *ciph,
150                const char *from, const char *to, void *arg);
151};
152
153static void do_all_cipher_fn(const OBJ_NAME *nm, void *arg)
154{
155    struct doall_cipher *dc = arg;
156    if (nm->alias)
157        dc->fn(NULL, nm->name, nm->data, dc->arg);
158    else
159        dc->fn((const EVP_CIPHER *)nm->data, nm->name, NULL, dc->arg);
160}
161
162void EVP_CIPHER_do_all(void (*fn) (const EVP_CIPHER *ciph,
163                                   const char *from, const char *to, void *x),
164                       void *arg)
165{
166    struct doall_cipher dc;
167    dc.fn = fn;
168    dc.arg = arg;
169    OBJ_NAME_do_all(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
170}
171
172void EVP_CIPHER_do_all_sorted(void (*fn) (const EVP_CIPHER *ciph,
173                                          const char *from, const char *to,
174                                          void *x), void *arg)
175{
176    struct doall_cipher dc;
177    dc.fn = fn;
178    dc.arg = arg;
179    OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
180}
181
182struct doall_md {
183    void *arg;
184    void (*fn) (const EVP_MD *ciph,
185                const char *from, const char *to, void *arg);
186};
187
188static void do_all_md_fn(const OBJ_NAME *nm, void *arg)
189{
190    struct doall_md *dc = arg;
191    if (nm->alias)
192        dc->fn(NULL, nm->name, nm->data, dc->arg);
193    else
194        dc->fn((const EVP_MD *)nm->data, nm->name, NULL, dc->arg);
195}
196
197void EVP_MD_do_all(void (*fn) (const EVP_MD *md,
198                               const char *from, const char *to, void *x),
199                   void *arg)
200{
201    struct doall_md dc;
202    dc.fn = fn;
203    dc.arg = arg;
204    OBJ_NAME_do_all(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
205}
206
207void EVP_MD_do_all_sorted(void (*fn) (const EVP_MD *md,
208                                      const char *from, const char *to,
209                                      void *x), void *arg)
210{
211    struct doall_md dc;
212    dc.fn = fn;
213    dc.arg = arg;
214    OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
215}
216