+++ /dev/null
-/* crypto/engine/e_gmp.c */
-/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
- * project 2003.
- */
-/* ====================================================================
- * Copyright (c) 1999-2001 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-/* This engine is not (currently) compiled in by default. Do enable it,
- * reconfigure OpenSSL with "enable-gmp -lgmp". The GMP libraries and
- * headers must reside in one of the paths searched by the compiler/linker,
- * otherwise paths must be specified - eg. try configuring with
- * "enable-gmp -I<includepath> -L<libpath> -lgmp". YMMV. */
-
-/* As for what this does - it's a largely unoptimised implementation of an
- * ENGINE that uses the GMP library to perform RSA private key operations. To
- * obtain more information about what "unoptimised" means, see my original mail
- * on the subject (though ignore the build instructions which have since
- * changed);
- *
- * http://www.mail-archive.com/openssl-dev@openssl.org/msg12227.html
- *
- * On my athlon system at least, it appears the builtin OpenSSL code is now
- * slightly faster, which is to say that the RSA-related MPI performance
- * between OpenSSL's BIGNUM and GMP's mpz implementations is probably pretty
- * balanced for this chip, and so the performance degradation in this ENGINE by
- * having to convert to/from GMP formats (and not being able to cache
- * montgomery forms) is probably the difference. However, if some unconfirmed
- * reports from users is anything to go by, the situation on some other
- * chipsets might be a good deal more favourable to the GMP version (eg. PPC).
- * Feedback welcome. */
-
-#include <stdio.h>
-#include <string.h>
-#include <openssl/crypto.h>
-#include <openssl/buffer.h>
-#include <openssl/engine.h>
-#ifndef OPENSSL_NO_RSA
-#include <openssl/rsa.h>
-#endif
-#include <openssl/bn.h>
-
-#ifndef OPENSSL_NO_HW
-#ifndef OPENSSL_NO_GMP
-
-#include <gmp.h>
-
-#define E_GMP_LIB_NAME "gmp engine"
-#include "e_gmp_err.c"
-
-static int e_gmp_destroy(ENGINE *e);
-static int e_gmp_init(ENGINE *e);
-static int e_gmp_finish(ENGINE *e);
-static int e_gmp_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
-
-#ifndef OPENSSL_NO_RSA
-/* RSA stuff */
-static int e_gmp_rsa_mod_exp(BIGNUM *r, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
-static int e_gmp_rsa_finish(RSA *r);
-#endif
-
-/* The definitions for control commands specific to this engine */
-/* #define E_GMP_CMD_SO_PATH ENGINE_CMD_BASE */
-static const ENGINE_CMD_DEFN e_gmp_cmd_defns[] = {
-#if 0
- {E_GMP_CMD_SO_PATH,
- "SO_PATH",
- "Specifies the path to the 'e_gmp' shared library",
- ENGINE_CMD_FLAG_STRING},
-#endif
- {0, NULL, NULL, 0}
- };
-
-#ifndef OPENSSL_NO_RSA
-/* Our internal RSA_METHOD that we provide pointers to */
-static RSA_METHOD e_gmp_rsa =
- {
- "GMP RSA method",
- NULL,
- NULL,
- NULL,
- NULL,
- e_gmp_rsa_mod_exp,
- NULL,
- NULL,
- e_gmp_rsa_finish,
- /* These flags initialise montgomery crud that GMP ignores, however it
- * makes sure the public key ops (which are done in openssl) don't seem
- * *slower* than usual :-) */
- RSA_FLAG_CACHE_PUBLIC|RSA_FLAG_CACHE_PRIVATE,
- NULL,
- NULL,
- NULL
- };
-#endif
-
-/* Constants used when creating the ENGINE */
-static const char *engine_e_gmp_id = "gmp";
-static const char *engine_e_gmp_name = "GMP engine support";
-
-/* This internal function is used by ENGINE_gmp() and possibly by the
- * "dynamic" ENGINE support too */
-static int bind_helper(ENGINE *e)
- {
-#ifndef OPENSSL_NO_RSA
- const RSA_METHOD *meth1;
-#endif
- if(!ENGINE_set_id(e, engine_e_gmp_id) ||
- !ENGINE_set_name(e, engine_e_gmp_name) ||
-#ifndef OPENSSL_NO_RSA
- !ENGINE_set_RSA(e, &e_gmp_rsa) ||
-#endif
- !ENGINE_set_destroy_function(e, e_gmp_destroy) ||
- !ENGINE_set_init_function(e, e_gmp_init) ||
- !ENGINE_set_finish_function(e, e_gmp_finish) ||
- !ENGINE_set_ctrl_function(e, e_gmp_ctrl) ||
- !ENGINE_set_cmd_defns(e, e_gmp_cmd_defns))
- return 0;
-
-#ifndef OPENSSL_NO_RSA
- meth1 = RSA_PKCS1_SSLeay();
- e_gmp_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
- e_gmp_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
- e_gmp_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
- e_gmp_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
- e_gmp_rsa.bn_mod_exp = meth1->bn_mod_exp;
-#endif
-
- /* Ensure the e_gmp error handling is set up */
- ERR_load_GMP_strings();
- return 1;
- }
-
-static ENGINE *engine_gmp(void)
- {
- ENGINE *ret = ENGINE_new();
- if(!ret)
- return NULL;
- if(!bind_helper(ret))
- {
- ENGINE_free(ret);
- return NULL;
- }
- return ret;
- }
-
-void ENGINE_load_gmp(void)
- {
- /* Copied from eng_[openssl|dyn].c */
- ENGINE *toadd = engine_gmp();
- if(!toadd) return;
- ENGINE_add(toadd);
- ENGINE_free(toadd);
- ERR_clear_error();
- }
-
-#ifndef OPENSSL_NO_RSA
-/* Used to attach our own key-data to an RSA structure */
-static int hndidx_rsa = -1;
-#endif
-
-static int e_gmp_destroy(ENGINE *e)
- {
- ERR_unload_GMP_strings();
- return 1;
- }
-
-/* (de)initialisation functions. */
-static int e_gmp_init(ENGINE *e)
- {
-#ifndef OPENSSL_NO_RSA
- if (hndidx_rsa == -1)
- hndidx_rsa = RSA_get_ex_new_index(0,
- "GMP-based RSA key handle",
- NULL, NULL, NULL);
-#endif
- if (hndidx_rsa == -1)
- return 0;
- return 1;
- }
-
-static int e_gmp_finish(ENGINE *e)
- {
- return 1;
- }
-
-static int e_gmp_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
- {
- int to_return = 1;
-
- switch(cmd)
- {
-#if 0
- case E_GMP_CMD_SO_PATH:
- /* ... */
-#endif
- /* The command isn't understood by this engine */
- default:
- GMPerr(GMP_F_E_GMP_CTRL,
- GMP_R_CTRL_COMMAND_NOT_IMPLEMENTED);
- to_return = 0;
- break;
- }
-
- return to_return;
- }
-
-
-/* Most often limb sizes will be the same. If not, we use hex conversion
- * which is neat, but extremely inefficient. */
-static int bn2gmp(const BIGNUM *bn, mpz_t g)
- {
- bn_check_top(bn);
- if(((sizeof(bn->d[0]) * 8) == GMP_NUMB_BITS) &&
- (BN_BITS2 == GMP_NUMB_BITS))
- {
- /* The common case */
- if(!_mpz_realloc (g, bn->top))
- return 0;
- memcpy(&g->_mp_d[0], &bn->d[0], bn->top * sizeof(bn->d[0]));
- g->_mp_size = bn->top;
- if(bn->neg)
- g->_mp_size = -g->_mp_size;
- return 1;
- }
- else
- {
- int toret;
- char *tmpchar = BN_bn2hex(bn);
- if(!tmpchar) return 0;
- toret = (mpz_set_str(g, tmpchar, 16) == 0 ? 1 : 0);
- OPENSSL_free(tmpchar);
- return toret;
- }
- }
-
-static int gmp2bn(mpz_t g, BIGNUM *bn)
- {
- if(((sizeof(bn->d[0]) * 8) == GMP_NUMB_BITS) &&
- (BN_BITS2 == GMP_NUMB_BITS))
- {
- /* The common case */
- int s = (g->_mp_size >= 0) ? g->_mp_size : -g->_mp_size;
- BN_zero(bn);
- if(bn_expand2 (bn, s) == NULL)
- return 0;
- bn->top = s;
- memcpy(&bn->d[0], &g->_mp_d[0], s * sizeof(bn->d[0]));
- bn_correct_top(bn);
- bn->neg = g->_mp_size >= 0 ? 0 : 1;
- return 1;
- }
- else
- {
- int toret;
- char *tmpchar = OPENSSL_malloc(mpz_sizeinbase(g, 16) + 10);
- if(!tmpchar) return 0;
- mpz_get_str(tmpchar, 16, g);
- toret = BN_hex2bn(&bn, tmpchar);
- OPENSSL_free(tmpchar);
- return toret;
- }
- }
-
-#ifndef OPENSSL_NO_RSA
-typedef struct st_e_gmp_rsa_ctx
- {
- int public_only;
- mpz_t n;
- mpz_t d;
- mpz_t e;
- mpz_t p;
- mpz_t q;
- mpz_t dmp1;
- mpz_t dmq1;
- mpz_t iqmp;
- mpz_t r0, r1, I0, m1;
- } E_GMP_RSA_CTX;
-
-static E_GMP_RSA_CTX *e_gmp_get_rsa(RSA *rsa)
- {
- E_GMP_RSA_CTX *hptr = RSA_get_ex_data(rsa, hndidx_rsa);
- if(hptr) return hptr;
- hptr = OPENSSL_malloc(sizeof(E_GMP_RSA_CTX));
- if(!hptr) return NULL;
- /* These inits could probably be replaced by more intelligent
- * mpz_init2() versions, to reduce malloc-thrashing. */
- mpz_init(hptr->n);
- mpz_init(hptr->d);
- mpz_init(hptr->e);
- mpz_init(hptr->p);
- mpz_init(hptr->q);
- mpz_init(hptr->dmp1);
- mpz_init(hptr->dmq1);
- mpz_init(hptr->iqmp);
- mpz_init(hptr->r0);
- mpz_init(hptr->r1);
- mpz_init(hptr->I0);
- mpz_init(hptr->m1);
- if(!bn2gmp(rsa->n, hptr->n) || !bn2gmp(rsa->e, hptr->e))
- goto err;
- if(!rsa->p || !rsa->q || !rsa->d || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
- {
- hptr->public_only = 1;
- return hptr;
- }
- if(!bn2gmp(rsa->d, hptr->d) || !bn2gmp(rsa->p, hptr->p) ||
- !bn2gmp(rsa->q, hptr->q) || !bn2gmp(rsa->dmp1, hptr->dmp1) ||
- !bn2gmp(rsa->dmq1, hptr->dmq1) || !bn2gmp(rsa->iqmp, hptr->iqmp))
- goto err;
- hptr->public_only = 0;
- RSA_set_ex_data(rsa, hndidx_rsa, hptr);
- return hptr;
-err:
- mpz_clear(hptr->n);
- mpz_clear(hptr->d);
- mpz_clear(hptr->e);
- mpz_clear(hptr->p);
- mpz_clear(hptr->q);
- mpz_clear(hptr->dmp1);
- mpz_clear(hptr->dmq1);
- mpz_clear(hptr->iqmp);
- mpz_clear(hptr->r0);
- mpz_clear(hptr->r1);
- mpz_clear(hptr->I0);
- mpz_clear(hptr->m1);
- OPENSSL_free(hptr);
- return NULL;
- }
-
-static int e_gmp_rsa_finish(RSA *rsa)
- {
- E_GMP_RSA_CTX *hptr = RSA_get_ex_data(rsa, hndidx_rsa);
- if(!hptr) return 0;
- mpz_clear(hptr->n);
- mpz_clear(hptr->d);
- mpz_clear(hptr->e);
- mpz_clear(hptr->p);
- mpz_clear(hptr->q);
- mpz_clear(hptr->dmp1);
- mpz_clear(hptr->dmq1);
- mpz_clear(hptr->iqmp);
- mpz_clear(hptr->r0);
- mpz_clear(hptr->r1);
- mpz_clear(hptr->I0);
- mpz_clear(hptr->m1);
- OPENSSL_free(hptr);
- RSA_set_ex_data(rsa, hndidx_rsa, NULL);
- return 1;
- }
-
-static int e_gmp_rsa_mod_exp(BIGNUM *r, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
- {
- E_GMP_RSA_CTX *hptr;
- int to_return = 0;
-
- hptr = e_gmp_get_rsa(rsa);
- if(!hptr)
- {
- GMPerr(GMP_F_E_GMP_RSA_MOD_EXP,
- GMP_R_KEY_CONTEXT_ERROR);
- return 0;
- }
- if(hptr->public_only)
- {
- GMPerr(GMP_F_E_GMP_RSA_MOD_EXP,
- GMP_R_MISSING_KEY_COMPONENTS);
- return 0;
- }
-
- /* ugh!!! */
- if(!bn2gmp(I, hptr->I0))
- return 0;
-
- /* This is basically the CRT logic in crypto/rsa/rsa_eay.c reworded into
- * GMP-speak. It may be that GMP's API facilitates cleaner formulations
- * of this stuff, eg. better handling of negatives, or functions that
- * combine operations. */
-
- mpz_mod(hptr->r1, hptr->I0, hptr->q);
- mpz_powm(hptr->m1, hptr->r1, hptr->dmq1, hptr->q);
-
- mpz_mod(hptr->r1, hptr->I0, hptr->p);
- mpz_powm(hptr->r0, hptr->r1, hptr->dmp1, hptr->p);
-
- mpz_sub(hptr->r0, hptr->r0, hptr->m1);
-
- if(mpz_sgn(hptr->r0) < 0)
- mpz_add(hptr->r0, hptr->r0, hptr->p);
- mpz_mul(hptr->r1, hptr->r0, hptr->iqmp);
- mpz_mod(hptr->r0, hptr->r1, hptr->p);
-
- if(mpz_sgn(hptr->r0) < 0)
- mpz_add(hptr->r0, hptr->r0, hptr->p);
- mpz_mul(hptr->r1, hptr->r0, hptr->q);
- mpz_add(hptr->r0, hptr->r1, hptr->m1);
-
- /* ugh!!! */
- if(gmp2bn(hptr->r0, r))
- to_return = 1;
-
- return 1;
- }
-#endif
-
-#endif /* !OPENSSL_NO_GMP */
-
-/* This stuff is needed if this ENGINE is being compiled into a self-contained
- * shared-library. */
-#ifndef OPENSSL_NO_DYNAMIC_ENGINE
-IMPLEMENT_DYNAMIC_CHECK_FN()
-#ifndef OPENSSL_NO_GMP
-static int bind_fn(ENGINE *e, const char *id)
- {
- if(id && (strcmp(id, engine_e_gmp_id) != 0))
- return 0;
- if(!bind_helper(e))
- return 0;
- return 1;
- }
-IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
-#else
-OPENSSL_EXPORT
-int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
-OPENSSL_EXPORT
-int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
-#endif
-#endif /* !OPENSSL_NO_DYNAMIC_ENGINE */
-
-#endif /* !OPENSSL_NO_HW */
projects / cassiopeia.git / blobdiff