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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 1.19 2023/07/28 09:22:26 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/engine.h>
71#include <openssl/err.h>
72#include <openssl/evp.h>
73#include <openssl/pem.h>
74#include <openssl/rand.h>
75
76#ifndef OPENSSL_NO_DH
77#include <openssl/dh.h>
78#endif
79#ifndef OPENSSL_NO_DSA
80#include <openssl/dsa.h>
81#endif
82#ifndef OPENSSL_NO_RSA
83#include <openssl/rsa.h>
84#endif
85
86#include "evp_local.h"
87
88/* This testing gunk is implemented (and explained) lower down. It also assumes
89 * the application explicitly calls "ENGINE_load_openssl()" because this is no
90 * longer automatic in ENGINE_load_builtin_engines(). */
91#define TEST_ENG_OPENSSL_RC4
92#define TEST_ENG_OPENSSL_PKEY
93/* #define TEST_ENG_OPENSSL_RC4_OTHERS */
94#define TEST_ENG_OPENSSL_RC4_P_INIT
95/* #define TEST_ENG_OPENSSL_RC4_P_CIPHER */
96#define TEST_ENG_OPENSSL_SHA
97/* #define TEST_ENG_OPENSSL_SHA_OTHERS */
98/* #define TEST_ENG_OPENSSL_SHA_P_INIT */
99/* #define TEST_ENG_OPENSSL_SHA_P_UPDATE */
100/* #define TEST_ENG_OPENSSL_SHA_P_FINAL */
101
102/* Now check what of those algorithms are actually enabled */
103#ifdef OPENSSL_NO_RC4
104#undef TEST_ENG_OPENSSL_RC4
105#undef TEST_ENG_OPENSSL_RC4_OTHERS
106#undef TEST_ENG_OPENSSL_RC4_P_INIT
107#undef TEST_ENG_OPENSSL_RC4_P_CIPHER
108#endif
109#if defined(OPENSSL_NO_SHA) || defined(OPENSSL_NO_SHA1)
110#undef TEST_ENG_OPENSSL_SHA
111#undef TEST_ENG_OPENSSL_SHA_OTHERS
112#undef TEST_ENG_OPENSSL_SHA_P_INIT
113#undef TEST_ENG_OPENSSL_SHA_P_UPDATE
114#undef TEST_ENG_OPENSSL_SHA_P_FINAL
115#endif
116
117#ifdef TEST_ENG_OPENSSL_RC4
118static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
119 const int **nids, int nid);
120#endif
121#ifdef TEST_ENG_OPENSSL_SHA
122static int openssl_digests(ENGINE *e, const EVP_MD **digest,
123 const int **nids, int nid);
124#endif
125
126#ifdef TEST_ENG_OPENSSL_PKEY
127static EVP_PKEY *openssl_load_privkey(ENGINE *eng, const char *key_id,
128 UI_METHOD *ui_method, void *callback_data);
129#endif
130
131/* The constants used when creating the ENGINE */
132static const char *engine_openssl_id = "openssl";
133static const char *engine_openssl_name = "Software engine support";
134
135/* This internal function is used by ENGINE_openssl() and possibly by the
136 * "dynamic" ENGINE support too */
137static int
138bind_helper(ENGINE *e)
139{
140 if (!ENGINE_set_id(e, engine_openssl_id) ||
141 !ENGINE_set_name(e, engine_openssl_name)
142#ifndef TEST_ENG_OPENSSL_NO_ALGORITHMS
143#ifndef OPENSSL_NO_RSA
144 || !ENGINE_set_RSA(e, RSA_get_default_method())
145#endif
146#ifndef OPENSSL_NO_DSA
147 || !ENGINE_set_DSA(e, DSA_get_default_method())
148#endif
149#ifndef OPENSSL_NO_DH
150 || !ENGINE_set_DH(e, DH_get_default_method())
151#endif
152 || !ENGINE_set_RAND(e, RAND_SSLeay())
153#ifdef TEST_ENG_OPENSSL_RC4
154 || !ENGINE_set_ciphers(e, openssl_ciphers)
155#endif
156#ifdef TEST_ENG_OPENSSL_SHA
157 || !ENGINE_set_digests(e, openssl_digests)
158#endif
159#endif
160#ifdef TEST_ENG_OPENSSL_PKEY
161 || !ENGINE_set_load_privkey_function(e, openssl_load_privkey)
162#endif
163 )
164 return 0;
165 /* If we add errors to this ENGINE, ensure the error handling is setup here */
166 /* openssl_load_error_strings(); */
167 return 1;
168}
169
170static ENGINE *
171engine_openssl(void)
172{
173 ENGINE *ret = ENGINE_new();
174
175 if (ret == NULL)
176 return NULL;
177 if (!bind_helper(ret)) {
178 ENGINE_free(ret);
179 return NULL;
180 }
181 return ret;
182}
183
184void
185ENGINE_load_openssl(void)
186{
187 ENGINE *toadd = engine_openssl();
188
189 if (toadd == NULL)
190 return;
191 (void) ENGINE_add(toadd);
192 /* If the "add" worked, it gets a structural reference. So either way,
193 * we release our just-created reference. */
194 ENGINE_free(toadd);
195 ERR_clear_error();
196}
197
198/* This stuff is needed if this ENGINE is being compiled into a self-contained
199 * shared-library. */
200#ifdef ENGINE_DYNAMIC_SUPPORT
201static int
202bind_fn(ENGINE *e, const char *id)
203{
204 if (id && (strcmp(id, engine_openssl_id) != 0))
205 return 0;
206 if (!bind_helper(e))
207 return 0;
208 return 1;
209}
210IMPLEMENT_DYNAMIC_CHECK_FN()
211IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
212#endif /* ENGINE_DYNAMIC_SUPPORT */
213
214#ifdef TEST_ENG_OPENSSL_RC4
215/* This section of code compiles an "alternative implementation" of two modes of
216 * RC4 into this ENGINE. The result is that EVP_CIPHER operation for "rc4"
217 * should under normal circumstances go via this support rather than the default
218 * EVP support. There are other symbols to tweak the testing;
219 * TEST_ENC_OPENSSL_RC4_OTHERS - print a one line message to stderr each time
220 * we're asked for a cipher we don't support (should not happen).
221 * TEST_ENG_OPENSSL_RC4_P_INIT - print a one line message to stderr each time
222 * the "init_key" handler is called.
223 * TEST_ENG_OPENSSL_RC4_P_CIPHER - ditto for the "cipher" handler.
224 */
225#include <openssl/rc4.h>
226#define TEST_RC4_KEY_SIZE 16
227static int test_cipher_nids[] = {NID_rc4, NID_rc4_40};
228static int test_cipher_nids_number = 2;
229
230typedef struct {
231 unsigned char key[TEST_RC4_KEY_SIZE];
232 RC4_KEY ks;
233} TEST_RC4_KEY;
234
235#define test(ctx) ((TEST_RC4_KEY *)(ctx)->cipher_data)
236static int
237test_rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
238 const unsigned char *iv, int enc)
239{
240#ifdef TEST_ENG_OPENSSL_RC4_P_INIT
241 fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_init_key() called\n");
242#endif
243 memcpy(&test(ctx)->key[0], key, EVP_CIPHER_CTX_key_length(ctx));
244 RC4_set_key(&test(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
245 test(ctx)->key);
246 return 1;
247}
248
249static int
250test_rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
251 const unsigned char *in, size_t inl)
252{
253#ifdef TEST_ENG_OPENSSL_RC4_P_CIPHER
254 fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_cipher() called\n");
255#endif
256 RC4(&test(ctx)->ks, inl, in, out);
257 return 1;
258}
259
260static const EVP_CIPHER test_r4_cipher = {
261 NID_rc4,
262 1, TEST_RC4_KEY_SIZE, 0,
263 EVP_CIPH_VARIABLE_LENGTH,
264 test_rc4_init_key,
265 test_rc4_cipher,
266 NULL,
267 sizeof(TEST_RC4_KEY),
268 NULL,
269 NULL,
270 NULL,
271 NULL
272};
273
274static const EVP_CIPHER test_r4_40_cipher = {
275 NID_rc4_40,
276 1,5 /* 40 bit */,0,
277 EVP_CIPH_VARIABLE_LENGTH,
278 test_rc4_init_key,
279 test_rc4_cipher,
280 NULL,
281 sizeof(TEST_RC4_KEY),
282 NULL,
283 NULL,
284 NULL,
285 NULL
286};
287
288static int
289openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid)
290{
291 if (!cipher) {
292 /* We are returning a list of supported nids */
293 *nids = test_cipher_nids;
294 return test_cipher_nids_number;
295 }
296 /* We are being asked for a specific cipher */
297 if (nid == NID_rc4)
298 *cipher = &test_r4_cipher;
299 else if (nid == NID_rc4_40)
300 *cipher = &test_r4_40_cipher;
301 else {
302#ifdef TEST_ENG_OPENSSL_RC4_OTHERS
303 fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) returning NULL for "
304 "nid %d\n", nid);
305#endif
306 *cipher = NULL;
307 return 0;
308 }
309 return 1;
310}
311#endif
312
313#ifdef TEST_ENG_OPENSSL_SHA
314/* Much the same sort of comment as for TEST_ENG_OPENSSL_RC4 */
315#include <openssl/sha.h>
316static int test_digest_nids[] = {NID_sha1};
317static int test_digest_nids_number = 1;
318
319static int
320test_sha1_init(EVP_MD_CTX *ctx)
321{
322#ifdef TEST_ENG_OPENSSL_SHA_P_INIT
323 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_init() called\n");
324#endif
325 return SHA1_Init(ctx->md_data);
326}
327
328static int
329test_sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count)
330{
331#ifdef TEST_ENG_OPENSSL_SHA_P_UPDATE
332 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_update() called\n");
333#endif
334 return SHA1_Update(ctx->md_data, data, count);
335}
336
337static int
338test_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
339{
340#ifdef TEST_ENG_OPENSSL_SHA_P_FINAL
341 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_final() called\n");
342#endif
343 return SHA1_Final(md, ctx->md_data);
344}
345
346static const EVP_MD test_sha_md = {
347 .type = NID_sha1,
348 .pkey_type = NID_sha1WithRSAEncryption,
349 .md_size = SHA_DIGEST_LENGTH,
350 .flags = 0,
351 .init = test_sha1_init,
352 .update = test_sha1_update,
353 .final = test_sha1_final,
354 .copy = NULL,
355 .cleanup = NULL,
356 .block_size = SHA_CBLOCK,
357 .ctx_size = sizeof(EVP_MD *) + sizeof(SHA_CTX),
358};
359
360static int
361openssl_digests(ENGINE *e, const EVP_MD **digest, const int **nids, int nid)
362{
363 if (!digest) {
364 /* We are returning a list of supported nids */
365 *nids = test_digest_nids;
366 return test_digest_nids_number;
367 }
368 /* We are being asked for a specific digest */
369 if (nid == NID_sha1)
370 *digest = &test_sha_md;
371 else {
372#ifdef TEST_ENG_OPENSSL_SHA_OTHERS
373 fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) returning NULL for "
374 "nid %d\n", nid);
375#endif
376 *digest = NULL;
377 return 0;
378 }
379 return 1;
380}
381#endif
382
383#ifdef TEST_ENG_OPENSSL_PKEY
384static EVP_PKEY *
385openssl_load_privkey(ENGINE *eng, const char *key_id, UI_METHOD *ui_method,
386 void *callback_data)
387{
388 BIO *in;
389 EVP_PKEY *key;
390
391 fprintf(stderr, "(TEST_ENG_OPENSSL_PKEY)Loading Private key %s\n",
392 key_id);
393 in = BIO_new_file(key_id, "r");
394 if (!in)
395 return NULL;
396 key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL);
397 BIO_free(in);
398 return key;
399}
400#endif
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