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- /*
- * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
- */
- /* ====================================================================
- * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- */
- #include <stdio.h>
- #include <string.h>
- #include <openssl/engine.h>
- #include <openssl/sha.h>
- #include <openssl/rsa.h>
- #include <openssl/evp.h>
- #include <openssl/async.h>
- #include <openssl/bn.h>
- #include <openssl/crypto.h>
- #define DASYNC_LIB_NAME "DASYNC"
- #include "e_dasync_err.c"
- /* Engine Id and Name */
- static const char *engine_dasync_id = "dasync";
- static const char *engine_dasync_name = "Dummy Async engine support";
- /* Engine Lifetime functions */
- static int dasync_destroy(ENGINE *e);
- static int dasync_init(ENGINE *e);
- static int dasync_finish(ENGINE *e);
- void engine_load_dasync_internal(void);
- /* Set up digests. Just SHA1 for now */
- static int dasync_digests(ENGINE *e, const EVP_MD **digest,
- const int **nids, int nid);
- static void dummy_pause_job(void);
- /* SHA1 */
- static int dasync_sha1_init(EVP_MD_CTX *ctx);
- static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
- size_t count);
- static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md);
- static EVP_MD *_hidden_sha1_md = NULL;
- static const EVP_MD *dasync_sha1(void)
- {
- if (_hidden_sha1_md == NULL) {
- EVP_MD *md;
- if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
- || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
- || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
- || !EVP_MD_meth_set_app_datasize(md,
- sizeof(EVP_MD *) + sizeof(SHA_CTX))
- || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
- || !EVP_MD_meth_set_init(md, dasync_sha1_init)
- || !EVP_MD_meth_set_update(md, dasync_sha1_update)
- || !EVP_MD_meth_set_final(md, dasync_sha1_final)) {
- EVP_MD_meth_free(md);
- md = NULL;
- }
- _hidden_sha1_md = md;
- }
- return _hidden_sha1_md;
- }
- static void destroy_digests(void)
- {
- EVP_MD_meth_free(_hidden_sha1_md);
- _hidden_sha1_md = NULL;
- }
- static int dasync_digest_nids(const int **nids)
- {
- static int digest_nids[2] = { 0, 0 };
- static int pos = 0;
- static int init = 0;
- if (!init) {
- const EVP_MD *md;
- if ((md = dasync_sha1()) != NULL)
- digest_nids[pos++] = EVP_MD_type(md);
- digest_nids[pos] = 0;
- init = 1;
- }
- *nids = digest_nids;
- return pos;
- }
- /* RSA */
- static int dasync_pub_enc(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding);
- static int dasync_pub_dec(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding);
- static int dasync_rsa_priv_enc(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding);
- static int dasync_rsa_priv_dec(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding);
- static int dasync_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
- BN_CTX *ctx);
- static int dasync_rsa_init(RSA *rsa);
- static int dasync_rsa_finish(RSA *rsa);
- static RSA_METHOD dasync_rsa_method = {
- "Dummy Async RSA method",
- dasync_pub_enc, /* pub_enc */
- dasync_pub_dec, /* pub_dec */
- dasync_rsa_priv_enc, /* priv_enc */
- dasync_rsa_priv_dec, /* priv_dec */
- dasync_rsa_mod_exp, /* rsa_mod_exp */
- BN_mod_exp_mont, /* bn_mod_exp */
- dasync_rsa_init, /* init */
- dasync_rsa_finish, /* finish */
- 0, /* flags */
- NULL, /* app_data */
- 0, /* rsa_sign */
- 0, /* rsa_verify */
- NULL /* rsa_keygen */
- };
- static int bind_dasync(ENGINE *e)
- {
- /* Ensure the dasync error handling is set up */
- ERR_load_DASYNC_strings();
- if (!ENGINE_set_id(e, engine_dasync_id)
- || !ENGINE_set_name(e, engine_dasync_name)
- || !ENGINE_set_RSA(e, &dasync_rsa_method)
- || !ENGINE_set_digests(e, dasync_digests)
- || !ENGINE_set_destroy_function(e, dasync_destroy)
- || !ENGINE_set_init_function(e, dasync_init)
- || !ENGINE_set_finish_function(e, dasync_finish)) {
- DASYNCerr(DASYNC_F_BIND_DASYNC, DASYNC_R_INIT_FAILED);
- return 0;
- }
- return 1;
- }
- # ifndef OPENSSL_NO_DYNAMIC_ENGINE
- static int bind_helper(ENGINE *e, const char *id)
- {
- if (id && (strcmp(id, engine_dasync_id) != 0))
- return 0;
- if (!bind_dasync(e))
- return 0;
- return 1;
- }
- IMPLEMENT_DYNAMIC_CHECK_FN()
- IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
- # endif
- static ENGINE *engine_dasync(void)
- {
- ENGINE *ret = ENGINE_new();
- if (!ret)
- return NULL;
- if (!bind_dasync(ret)) {
- ENGINE_free(ret);
- return NULL;
- }
- return ret;
- }
- void engine_load_dasync_internal(void)
- {
- ENGINE *toadd = engine_dasync();
- if (!toadd)
- return;
- ENGINE_add(toadd);
- ENGINE_free(toadd);
- ERR_clear_error();
- }
- static int dasync_init(ENGINE *e)
- {
- return 1;
- }
- static int dasync_finish(ENGINE *e)
- {
- return 1;
- }
- static int dasync_destroy(ENGINE *e)
- {
- destroy_digests();
- ERR_unload_DASYNC_strings();
- return 1;
- }
- static int dasync_digests(ENGINE *e, const EVP_MD **digest,
- const int **nids, int nid)
- {
- int ok = 1;
- if (!digest) {
- /* We are returning a list of supported nids */
- return dasync_digest_nids(nids);
- }
- /* We are being asked for a specific digest */
- switch (nid) {
- case NID_sha1:
- *digest = dasync_sha1();
- break;
- default:
- ok = 0;
- *digest = NULL;
- break;
- }
- return ok;
- }
- static void dummy_pause_job(void) {
- ASYNC_JOB *job;
- if ((job = ASYNC_get_current_job()) == NULL)
- return;
- /*
- * In the Dummy async engine we are cheating. We signal that the job
- * is complete by waking it before the call to ASYNC_pause_job(). A real
- * async engine would only wake when the job was actually complete
- */
- ASYNC_wake(job);
- /* Ignore errors - we carry on anyway */
- ASYNC_pause_job();
- ASYNC_clear_wake(job);
- }
- /*
- * SHA1 implementation. At the moment we just defer to the standard
- * implementation
- */
- #undef data
- #define data(ctx) ((SHA_CTX *)EVP_MD_CTX_md_data(ctx))
- static int dasync_sha1_init(EVP_MD_CTX *ctx)
- {
- dummy_pause_job();
- return SHA1_Init(data(ctx));
- }
- static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
- size_t count)
- {
- dummy_pause_job();
- return SHA1_Update(data(ctx), data, (size_t)count);
- }
- static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
- {
- dummy_pause_job();
- return SHA1_Final(md, data(ctx));
- }
- /*
- * RSA implementation
- */
- static int dasync_pub_enc(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding) {
- /* Ignore errors - we carry on anyway */
- dummy_pause_job();
- return RSA_PKCS1_OpenSSL()->rsa_pub_enc(flen, from, to, rsa, padding);
- }
- static int dasync_pub_dec(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding) {
- /* Ignore errors - we carry on anyway */
- dummy_pause_job();
- return RSA_PKCS1_OpenSSL()->rsa_pub_dec(flen, from, to, rsa, padding);
- }
- static int dasync_rsa_priv_enc(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding)
- {
- /* Ignore errors - we carry on anyway */
- dummy_pause_job();
- return RSA_PKCS1_OpenSSL()->rsa_priv_enc(flen, from, to, rsa, padding);
- }
- static int dasync_rsa_priv_dec(int flen, const unsigned char *from,
- unsigned char *to, RSA *rsa, int padding)
- {
- /* Ignore errors - we carry on anyway */
- dummy_pause_job();
- return RSA_PKCS1_OpenSSL()->rsa_priv_dec(flen, from, to, rsa, padding);
- }
- static int dasync_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
- {
- /* Ignore errors - we carry on anyway */
- dummy_pause_job();
- return RSA_PKCS1_OpenSSL()->rsa_mod_exp(r0, I, rsa, ctx);
- }
- static int dasync_rsa_init(RSA *rsa)
- {
- return RSA_PKCS1_OpenSSL()->init(rsa);
- }
- static int dasync_rsa_finish(RSA *rsa)
- {
- return RSA_PKCS1_OpenSSL()->finish(rsa);
- }
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