From dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0 Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 12 Sep 2011 11:27:51 +0200 Subject: Synchronised line endinge with release branch --- openssl/engines/e_gmp.c | 960 ++++++++++++++++++++++++------------------------ 1 file changed, 480 insertions(+), 480 deletions(-) (limited to 'openssl/engines/e_gmp.c') diff --git a/openssl/engines/e_gmp.c b/openssl/engines/e_gmp.c index 63d68b0c2..a3d47151e 100644 --- a/openssl/engines/e_gmp.c +++ b/openssl/engines/e_gmp.c @@ -1,480 +1,480 @@ -/* 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 -L -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 -#include -#include -#include -#include -#ifndef OPENSSL_NO_RSA -#include -#endif -#include - -#ifndef OPENSSL_NO_HW -#ifndef OPENSSL_NO_GMP - -#include - -#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 */ +/* 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 -L -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 +#include +#include +#include +#include +#ifndef OPENSSL_NO_RSA +#include +#endif +#include + +#ifndef OPENSSL_NO_HW +#ifndef OPENSSL_NO_GMP + +#include + +#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 */ -- cgit v1.2.3