1 /* crypto/engine/hw_nuron.c */
2 /* Written by Ben Laurie for the OpenSSL Project, leaning heavily on Geoff
3 * Thorpe's Atalla implementation.
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
60 #include <openssl/crypto.h>
62 #include <openssl/dso.h>
63 #include <openssl/engine.h>
67 #ifndef OPENSSL_NO_HW_NURON
69 static const char *NURON_LIBNAME = "nuronssl";
70 static const char *NURON_F1 = "nuron_mod_exp";
72 typedef int tfnModExp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,const BIGNUM *m);
73 static tfnModExp *pfnModExp = NULL;
75 static DSO *pvDSOHandle = NULL;
77 static int nuron_init(ENGINE *e)
79 if(pvDSOHandle != NULL)
81 ENGINEerr(ENGINE_F_NURON_INIT,ENGINE_R_ALREADY_LOADED);
85 pvDSOHandle=DSO_load(NULL, NURON_LIBNAME, NULL,
86 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY);
89 ENGINEerr(ENGINE_F_NURON_INIT,ENGINE_R_DSO_NOT_FOUND);
93 pfnModExp=(tfnModExp *)DSO_bind_func(pvDSOHandle, NURON_F1);
96 ENGINEerr(ENGINE_F_NURON_INIT,ENGINE_R_DSO_FUNCTION_NOT_FOUND);
103 static int nuron_finish(ENGINE *e)
105 if(pvDSOHandle == NULL)
107 ENGINEerr(ENGINE_F_NURON_FINISH,ENGINE_R_NOT_LOADED);
110 if(!DSO_free(pvDSOHandle))
112 ENGINEerr(ENGINE_F_NURON_FINISH,ENGINE_R_DSO_FAILURE);
120 static int nuron_mod_exp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,
121 const BIGNUM *m,BN_CTX *ctx)
125 ENGINEerr(ENGINE_F_NURON_MOD_EXP,ENGINE_R_NOT_LOADED);
128 return pfnModExp(r,a,p,m);
131 static int nuron_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
133 return nuron_mod_exp(r0,I,rsa->d,rsa->n,NULL);
136 /* This code was liberated and adapted from the commented-out code in
137 * dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration
138 * (it doesn't have a CRT form for RSA), this function means that an
139 * Atalla system running with a DSA server certificate can handshake
140 * around 5 or 6 times faster/more than an equivalent system running with
141 * RSA. Just check out the "signs" statistics from the RSA and DSA parts
142 * of "openssl speed -engine atalla dsa1024 rsa1024". */
143 static int nuron_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
144 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
145 BN_CTX *ctx, BN_MONT_CTX *in_mont)
151 /* let rr = a1 ^ p1 mod m */
152 if (!nuron_mod_exp(rr,a1,p1,m,ctx))
154 /* let t = a2 ^ p2 mod m */
155 if (!nuron_mod_exp(&t,a2,p2,m,ctx))
157 /* let rr = rr * t mod m */
158 if (!BN_mod_mul(rr,rr,&t,m,ctx))
167 static int nuron_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
168 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
171 return nuron_mod_exp(r, a, p, m, ctx);
174 /* This function is aliased to mod_exp (with the mont stuff dropped). */
175 static int nuron_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
176 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
178 return nuron_mod_exp(r, a, p, m, ctx);
181 /* This function is aliased to mod_exp (with the dh and mont dropped). */
182 static int nuron_mod_exp_dh(const DH *dh, BIGNUM *r,
183 const BIGNUM *a, const BIGNUM *p,
184 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
186 return nuron_mod_exp(r, a, p, m, ctx);
189 static RSA_METHOD nuron_rsa =
206 static DSA_METHOD nuron_dsa =
209 NULL, /* dsa_do_sign */
210 NULL, /* dsa_sign_setup */
211 NULL, /* dsa_do_verify */
212 nuron_dsa_mod_exp, /* dsa_mod_exp */
213 nuron_mod_exp_dsa, /* bn_mod_exp */
220 static DH_METHOD nuron_dh =
232 /* Constants used when creating the ENGINE */
233 static const char *engine_nuron_id = "nuron";
234 static const char *engine_nuron_name = "Nuron hardware engine support";
236 /* As this is only ever called once, there's no need for locking
237 * (indeed - the lock will already be held by our caller!!!) */
238 ENGINE *ENGINE_nuron()
240 const RSA_METHOD *meth1;
241 const DSA_METHOD *meth2;
242 const DH_METHOD *meth3;
243 ENGINE *ret = ENGINE_new();
246 if(!ENGINE_set_id(ret, engine_nuron_id) ||
247 !ENGINE_set_name(ret, engine_nuron_name) ||
248 !ENGINE_set_RSA(ret, &nuron_rsa) ||
249 !ENGINE_set_DSA(ret, &nuron_dsa) ||
250 !ENGINE_set_DH(ret, &nuron_dh) ||
251 !ENGINE_set_BN_mod_exp(ret, nuron_mod_exp) ||
252 !ENGINE_set_init_function(ret, nuron_init) ||
253 !ENGINE_set_finish_function(ret, nuron_finish))
259 /* We know that the "PKCS1_SSLeay()" functions hook properly
260 * to the nuron-specific mod_exp and mod_exp_crt so we use
261 * those functions. NB: We don't use ENGINE_openssl() or
262 * anything "more generic" because something like the RSAref
263 * code may not hook properly, and if you own one of these
264 * cards then you have the right to do RSA operations on it
266 meth1=RSA_PKCS1_SSLeay();
267 nuron_rsa.rsa_pub_enc=meth1->rsa_pub_enc;
268 nuron_rsa.rsa_pub_dec=meth1->rsa_pub_dec;
269 nuron_rsa.rsa_priv_enc=meth1->rsa_priv_enc;
270 nuron_rsa.rsa_priv_dec=meth1->rsa_priv_dec;
272 /* Use the DSA_OpenSSL() method and just hook the mod_exp-ish
275 nuron_dsa.dsa_do_sign=meth2->dsa_do_sign;
276 nuron_dsa.dsa_sign_setup=meth2->dsa_sign_setup;
277 nuron_dsa.dsa_do_verify=meth2->dsa_do_verify;
279 /* Much the same for Diffie-Hellman */
281 nuron_dh.generate_key=meth3->generate_key;
282 nuron_dh.compute_key=meth3->compute_key;
286 #endif /* !OPENSSL_NO_HW_NURON */
287 #endif /* !OPENSSL_NO_HW */