diff options
Diffstat (limited to 'openssl/engines/e_gmp.c')
| -rw-r--r-- | openssl/engines/e_gmp.c | 958 |
1 files changed, 480 insertions, 478 deletions
diff --git a/openssl/engines/e_gmp.c b/openssl/engines/e_gmp.c index c1f5601b6..63d68b0c2 100644 --- a/openssl/engines/e_gmp.c +++ b/openssl/engines/e_gmp.c @@ -1,478 +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<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) { 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<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 */
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