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diff --git a/src/lib/libcrypto/engine/eng_openssl.c b/src/lib/libcrypto/engine/eng_openssl.c
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1/* $OpenBSD: eng_openssl.c,v 1.16 2022/11/26 16:08:52 tb Exp $ */
2/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58/* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * ECDH support in OpenSSL originally developed by
61 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
62 */
63
64#include <stdio.h>
65#include <string.h>
66
67#include <openssl/opensslconf.h>
68
69#include <openssl/crypto.h>
70#include <openssl/dso.h>
71#include <openssl/engine.h>
72#include <openssl/err.h>
73#include <openssl/evp.h>
74#include <openssl/pem.h>
75#include <openssl/rand.h>
76
77#ifndef OPENSSL_NO_DH
78#include <openssl/dh.h>
79#endif
80#ifndef OPENSSL_NO_DSA
81#include <openssl/dsa.h>
82#endif
83#ifndef OPENSSL_NO_RSA
84#include <openssl/rsa.h>
85#endif
86
87#include "evp_local.h"
88
89/* This testing gunk is implemented (and explained) lower down. It also assumes
90 * the application explicitly calls "ENGINE_load_openssl()" because this is no
91 * longer automatic in ENGINE_load_builtin_engines(). */
92#define TEST_ENG_OPENSSL_RC4
93#define TEST_ENG_OPENSSL_PKEY
94/* #define TEST_ENG_OPENSSL_RC4_OTHERS */
95#define TEST_ENG_OPENSSL_RC4_P_INIT
96/* #define TEST_ENG_OPENSSL_RC4_P_CIPHER */
97#define TEST_ENG_OPENSSL_SHA
98/* #define TEST_ENG_OPENSSL_SHA_OTHERS */
99/* #define TEST_ENG_OPENSSL_SHA_P_INIT */
100/* #define TEST_ENG_OPENSSL_SHA_P_UPDATE */
101/* #define TEST_ENG_OPENSSL_SHA_P_FINAL */
102
103/* Now check what of those algorithms are actually enabled */
104#ifdef OPENSSL_NO_RC4
105#undef TEST_ENG_OPENSSL_RC4
106#undef TEST_ENG_OPENSSL_RC4_OTHERS
107#undef TEST_ENG_OPENSSL_RC4_P_INIT
108#undef TEST_ENG_OPENSSL_RC4_P_CIPHER
109#endif
110#if defined(OPENSSL_NO_SHA) || defined(OPENSSL_NO_SHA1)
111#undef TEST_ENG_OPENSSL_SHA
112#undef TEST_ENG_OPENSSL_SHA_OTHERS
113#undef TEST_ENG_OPENSSL_SHA_P_INIT
114#undef TEST_ENG_OPENSSL_SHA_P_UPDATE
115#undef TEST_ENG_OPENSSL_SHA_P_FINAL
116#endif
117
118#ifdef TEST_ENG_OPENSSL_RC4
119static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
120 const int **nids, int nid);
121#endif
122#ifdef TEST_ENG_OPENSSL_SHA
123static int openssl_digests(ENGINE *e, const EVP_MD **digest,
124 const int **nids, int nid);
125#endif
126
127#ifdef TEST_ENG_OPENSSL_PKEY
128static EVP_PKEY *openssl_load_privkey(ENGINE *eng, const char *key_id,
129 UI_METHOD *ui_method, void *callback_data);
130#endif
131
132/* The constants used when creating the ENGINE */
133static const char *engine_openssl_id = "openssl";
134static const char *engine_openssl_name = "Software engine support";
135
136/* This internal function is used by ENGINE_openssl() and possibly by the
137 * "dynamic" ENGINE support too */
138static int
139bind_helper(ENGINE *e)
140{
141 if (!ENGINE_set_id(e, engine_openssl_id) ||
142 !ENGINE_set_name(e, engine_openssl_name)
143#ifndef TEST_ENG_OPENSSL_NO_ALGORITHMS
144#ifndef OPENSSL_NO_RSA
145 || !ENGINE_set_RSA(e, RSA_get_default_method())
146#endif
147#ifndef OPENSSL_NO_DSA
148 || !ENGINE_set_DSA(e, DSA_get_default_method())
149#endif
150#ifndef OPENSSL_NO_ECDH
151 || !ENGINE_set_ECDH(e, ECDH_OpenSSL())
152#endif
153#ifndef OPENSSL_NO_ECDSA
154 || !ENGINE_set_ECDSA(e, ECDSA_OpenSSL())
155#endif
156#ifndef OPENSSL_NO_DH
157 || !ENGINE_set_DH(e, DH_get_default_method())
158#endif
159 || !ENGINE_set_RAND(e, RAND_SSLeay())
160#ifdef TEST_ENG_OPENSSL_RC4
161 || !ENGINE_set_ciphers(e, openssl_ciphers)
162#endif
163#ifdef TEST_ENG_OPENSSL_SHA
164 || !ENGINE_set_digests(e, openssl_digests)
165#endif
166#endif
167#ifdef TEST_ENG_OPENSSL_PKEY
168 || !ENGINE_set_load_privkey_function(e, openssl_load_privkey)
169#endif
170 )
171 return 0;
172 /* If we add errors to this ENGINE, ensure the error handling is setup here */
173 /* openssl_load_error_strings(); */
174 return 1;
175}
176
177static ENGINE *
178engine_openssl(void)
179{
180 ENGINE *ret = ENGINE_new();
181
182 if (ret == NULL)
183 return NULL;
184 if (!bind_helper(ret)) {
185 ENGINE_free(ret);
186 return NULL;
187 }
188 return ret;
189}
190
191void
192ENGINE_load_openssl(void)
193{
194 ENGINE *toadd = engine_openssl();
195
196 if (toadd == NULL)
197 return;
198 (void) ENGINE_add(toadd);
199 /* If the "add" worked, it gets a structural reference. So either way,
200 * we release our just-created reference. */
201 ENGINE_free(toadd);
202 ERR_clear_error();
203}
204
205/* This stuff is needed if this ENGINE is being compiled into a self-contained
206 * shared-library. */
207#ifdef ENGINE_DYNAMIC_SUPPORT
208static int
209bind_fn(ENGINE *e, const char *id)
210{
211 if (id && (strcmp(id, engine_openssl_id) != 0))
212 return 0;
213 if (!bind_helper(e))
214 return 0;
215 return 1;
216}
217IMPLEMENT_DYNAMIC_CHECK_FN()
218IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
219#endif /* ENGINE_DYNAMIC_SUPPORT */
220
221#ifdef TEST_ENG_OPENSSL_RC4
222/* This section of code compiles an "alternative implementation" of two modes of
223 * RC4 into this ENGINE. The result is that EVP_CIPHER operation for "rc4"
224 * should under normal circumstances go via this support rather than the default
225 * EVP support. There are other symbols to tweak the testing;
226 * TEST_ENC_OPENSSL_RC4_OTHERS - print a one line message to stderr each time
227 * we're asked for a cipher we don't support (should not happen).
228 * TEST_ENG_OPENSSL_RC4_P_INIT - print a one line message to stderr each time
229 * the "init_key" handler is called.
230 * TEST_ENG_OPENSSL_RC4_P_CIPHER - ditto for the "cipher" handler.
231 */
232#include <openssl/rc4.h>
233#define TEST_RC4_KEY_SIZE 16
234static int test_cipher_nids[] = {NID_rc4, NID_rc4_40};
235static int test_cipher_nids_number = 2;
236
237typedef struct {
238 unsigned char key[TEST_RC4_KEY_SIZE];
239 RC4_KEY ks;
240} TEST_RC4_KEY;
241
242#define test(ctx) ((TEST_RC4_KEY *)(ctx)->cipher_data)
243static int
244test_rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
245 const unsigned char *iv, int enc)
246{
247#ifdef TEST_ENG_OPENSSL_RC4_P_INIT
248 fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_init_key() called\n");
249#endif
250 memcpy(&test(ctx)->key[0], key, EVP_CIPHER_CTX_key_length(ctx));
251 RC4_set_key(&test(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
252 test(ctx)->key);
253 return 1;
254}
255
256static int
257test_rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
258 const unsigned char *in, size_t inl)
259{
260#ifdef TEST_ENG_OPENSSL_RC4_P_CIPHER
261 fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_cipher() called\n");
262#endif
263 RC4(&test(ctx)->ks, inl, in, out);
264 return 1;
265}
266
267static const EVP_CIPHER test_r4_cipher = {
268 NID_rc4,
269 1, TEST_RC4_KEY_SIZE, 0,
270 EVP_CIPH_VARIABLE_LENGTH,
271 test_rc4_init_key,
272 test_rc4_cipher,
273 NULL,
274 sizeof(TEST_RC4_KEY),
275 NULL,
276 NULL,
277 NULL,
278 NULL
279};
280
281static const EVP_CIPHER test_r4_40_cipher = {
282 NID_rc4_40,
283 1,5 /* 40 bit */,0,
284 EVP_CIPH_VARIABLE_LENGTH,
285 test_rc4_init_key,
286 test_rc4_cipher,
287 NULL,
288 sizeof(TEST_RC4_KEY),
289 NULL,
290 NULL,
291 NULL,
292 NULL
293};
294
295static int
296openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid)
297{
298 if (!cipher) {
299 /* We are returning a list of supported nids */
300 *nids = test_cipher_nids;
301 return test_cipher_nids_number;
302 }
303 /* We are being asked for a specific cipher */
304 if (nid == NID_rc4)
305 *cipher = &test_r4_cipher;
306 else if (nid == NID_rc4_40)
307 *cipher = &test_r4_40_cipher;
308 else {
309#ifdef TEST_ENG_OPENSSL_RC4_OTHERS
310 fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) returning NULL for "
311 "nid %d\n", nid);
312#endif
313 *cipher = NULL;
314 return 0;
315 }
316 return 1;
317}
318#endif
319
320#ifdef TEST_ENG_OPENSSL_SHA
321/* Much the same sort of comment as for TEST_ENG_OPENSSL_RC4 */
322#include <openssl/sha.h>
323static int test_digest_nids[] = {NID_sha1};
324static int test_digest_nids_number = 1;
325
326static int
327test_sha1_init(EVP_MD_CTX *ctx)
328{
329#ifdef TEST_ENG_OPENSSL_SHA_P_INIT
330 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_init() called\n");
331#endif
332 return SHA1_Init(ctx->md_data);
333}
334
335static int
336test_sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count)
337{
338#ifdef TEST_ENG_OPENSSL_SHA_P_UPDATE
339 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_update() called\n");
340#endif
341 return SHA1_Update(ctx->md_data, data, count);
342}
343
344static int
345test_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
346{
347#ifdef TEST_ENG_OPENSSL_SHA_P_FINAL
348 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_final() called\n");
349#endif
350 return SHA1_Final(md, ctx->md_data);
351}
352
353static const EVP_MD test_sha_md = {
354 .type = NID_sha1,
355 .pkey_type = NID_sha1WithRSAEncryption,
356 .md_size = SHA_DIGEST_LENGTH,
357 .flags = 0,
358 .init = test_sha1_init,
359 .update = test_sha1_update,
360 .final = test_sha1_final,
361 .copy = NULL,
362 .cleanup = NULL,
363 .block_size = SHA_CBLOCK,
364 .ctx_size = sizeof(EVP_MD *) + sizeof(SHA_CTX),
365};
366
367static int
368openssl_digests(ENGINE *e, const EVP_MD **digest, const int **nids, int nid)
369{
370 if (!digest) {
371 /* We are returning a list of supported nids */
372 *nids = test_digest_nids;
373 return test_digest_nids_number;
374 }
375 /* We are being asked for a specific digest */
376 if (nid == NID_sha1)
377 *digest = &test_sha_md;
378 else {
379#ifdef TEST_ENG_OPENSSL_SHA_OTHERS
380 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) returning NULL for "
381 "nid %d\n", nid);
382#endif
383 *digest = NULL;
384 return 0;
385 }
386 return 1;
387}
388#endif
389
390#ifdef TEST_ENG_OPENSSL_PKEY
391static EVP_PKEY *
392openssl_load_privkey(ENGINE *eng, const char *key_id, UI_METHOD *ui_method,
393 void *callback_data)
394{
395 BIO *in;
396 EVP_PKEY *key;
397
398 fprintf(stderr, "(TEST_ENG_OPENSSL_PKEY)Loading Private key %s\n",
399 key_id);
400 in = BIO_new_file(key_id, "r");
401 if (!in)
402 return NULL;
403 key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL);
404 BIO_free(in);
405 return key;
406}
407#endif
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