2 * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
4 /* ====================================================================
5 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
56 #include <openssl/engine.h>
57 #include <openssl/sha.h>
58 #include <openssl/rsa.h>
59 #include <openssl/evp.h>
60 #include <openssl/async.h>
61 #include <openssl/bn.h>
63 #define DASYNC_LIB_NAME "DASYNC"
64 #include "e_dasync_err.c"
66 /* Engine Id and Name */
67 static const char *engine_dasync_id = "dasync";
68 static const char *engine_dasync_name = "Dummy Async engine support";
71 /* Engine Lifetime functions */
72 static int dasync_destroy(ENGINE *e);
73 static int dasync_init(ENGINE *e);
74 static int dasync_finish(ENGINE *e);
75 void ENGINE_load_dasync(void);
78 /* Set up digests. Just SHA1 for now */
79 static int dasync_digests(ENGINE *e, const EVP_MD **digest,
80 const int **nids, int nid);
82 static void dummy_pause_job(void);
85 static int dasync_sha1_init(EVP_MD_CTX *ctx);
86 static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
88 static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md);
90 static EVP_MD *_hidden_sha1_md = NULL;
91 static const EVP_MD *dasync_sha1(void)
93 if (_hidden_sha1_md == NULL) {
96 if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
97 || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
98 || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
99 || !EVP_MD_meth_set_app_datasize(md,
100 sizeof(EVP_MD *) + sizeof(SHA_CTX))
101 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
102 || !EVP_MD_meth_set_init(md, dasync_sha1_init)
103 || !EVP_MD_meth_set_update(md, dasync_sha1_update)
104 || !EVP_MD_meth_set_final(md, dasync_sha1_final)) {
105 EVP_MD_meth_free(md);
108 _hidden_sha1_md = md;
110 return _hidden_sha1_md;
112 static void destroy_digests(void)
114 EVP_MD_meth_free(_hidden_sha1_md);
115 _hidden_sha1_md = NULL;
117 static int dasync_digest_nids(const int **nids)
119 static int digest_nids[2] = { 0, 0 };
125 if ((md = dasync_sha1()) != NULL)
126 digest_nids[pos++] = EVP_MD_type(md);
127 digest_nids[pos] = 0;
136 static int dasync_pub_enc(int flen, const unsigned char *from,
137 unsigned char *to, RSA *rsa, int padding);
138 static int dasync_pub_dec(int flen, const unsigned char *from,
139 unsigned char *to, RSA *rsa, int padding);
140 static int dasync_rsa_priv_enc(int flen, const unsigned char *from,
141 unsigned char *to, RSA *rsa, int padding);
142 static int dasync_rsa_priv_dec(int flen, const unsigned char *from,
143 unsigned char *to, RSA *rsa, int padding);
144 static int dasync_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
147 static int dasync_rsa_init(RSA *rsa);
148 static int dasync_rsa_finish(RSA *rsa);
150 static RSA_METHOD dasync_rsa_method = {
151 "Dummy Async RSA method",
152 dasync_pub_enc, /* pub_enc */
153 dasync_pub_dec, /* pub_dec */
154 dasync_rsa_priv_enc, /* priv_enc */
155 dasync_rsa_priv_dec, /* priv_dec */
156 dasync_rsa_mod_exp, /* rsa_mod_exp */
157 BN_mod_exp_mont, /* bn_mod_exp */
158 dasync_rsa_init, /* init */
159 dasync_rsa_finish, /* finish */
164 NULL /* rsa_keygen */
168 static int bind_dasync(ENGINE *e)
170 /* Ensure the dasync error handling is set up */
171 ERR_load_DASYNC_strings();
173 if (!ENGINE_set_id(e, engine_dasync_id)
174 || !ENGINE_set_name(e, engine_dasync_name)
175 || !ENGINE_set_RSA(e, &dasync_rsa_method)
176 || !ENGINE_set_digests(e, dasync_digests)
177 || !ENGINE_set_destroy_function(e, dasync_destroy)
178 || !ENGINE_set_init_function(e, dasync_init)
179 || !ENGINE_set_finish_function(e, dasync_finish)) {
180 DASYNCerr(DASYNC_F_BIND_DASYNC, DASYNC_R_INIT_FAILED);
187 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
188 static int bind_helper(ENGINE *e, const char *id)
190 if (id && (strcmp(id, engine_dasync_id) != 0))
197 IMPLEMENT_DYNAMIC_CHECK_FN()
198 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
201 static ENGINE *engine_dasync(void)
203 ENGINE *ret = ENGINE_new();
206 if (!bind_dasync(ret)) {
213 void ENGINE_load_dasync(void)
215 ENGINE *toadd = engine_dasync();
223 static int dasync_init(ENGINE *e)
229 static int dasync_finish(ENGINE *e)
235 static int dasync_destroy(ENGINE *e)
238 ERR_unload_DASYNC_strings();
242 static int dasync_digests(ENGINE *e, const EVP_MD **digest,
243 const int **nids, int nid)
247 /* We are returning a list of supported nids */
248 return dasync_digest_nids(nids);
250 /* We are being asked for a specific digest */
253 *digest = dasync_sha1();
263 static void dummy_pause_job(void) {
266 if ((job = ASYNC_get_current_job()) == NULL)
270 * In the Dummy async engine we are cheating. We signal that the job
271 * is complete by waking it before the call to ASYNC_pause_job(). A real
272 * async engine would only wake when the job was actually complete
276 /* Ignore errors - we carry on anyway */
279 ASYNC_clear_wake(job);
284 * SHA1 implementation. At the moment we just defer to the standard
288 #define data(ctx) ((SHA_CTX *)EVP_MD_CTX_md_data(ctx))
289 static int dasync_sha1_init(EVP_MD_CTX *ctx)
293 return SHA1_Init(data(ctx));
296 static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
301 return SHA1_Update(data(ctx), data, (size_t)count);
304 static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
308 return SHA1_Final(md, data(ctx));
315 static int dasync_pub_enc(int flen, const unsigned char *from,
316 unsigned char *to, RSA *rsa, int padding) {
317 /* Ignore errors - we carry on anyway */
319 return RSA_PKCS1_OpenSSL()->rsa_pub_enc(flen, from, to, rsa, padding);
322 static int dasync_pub_dec(int flen, const unsigned char *from,
323 unsigned char *to, RSA *rsa, int padding) {
324 /* Ignore errors - we carry on anyway */
326 return RSA_PKCS1_OpenSSL()->rsa_pub_dec(flen, from, to, rsa, padding);
329 static int dasync_rsa_priv_enc(int flen, const unsigned char *from,
330 unsigned char *to, RSA *rsa, int padding)
332 /* Ignore errors - we carry on anyway */
334 return RSA_PKCS1_OpenSSL()->rsa_priv_enc(flen, from, to, rsa, padding);
337 static int dasync_rsa_priv_dec(int flen, const unsigned char *from,
338 unsigned char *to, RSA *rsa, int padding)
340 /* Ignore errors - we carry on anyway */
342 return RSA_PKCS1_OpenSSL()->rsa_priv_dec(flen, from, to, rsa, padding);
345 static int dasync_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
347 /* Ignore errors - we carry on anyway */
349 return RSA_PKCS1_OpenSSL()->rsa_mod_exp(r0, I, rsa, ctx);
352 static int dasync_rsa_init(RSA *rsa)
354 return RSA_PKCS1_OpenSSL()->init(rsa);
356 static int dasync_rsa_finish(RSA *rsa)
358 return RSA_PKCS1_OpenSSL()->finish(rsa);