| /* crypto/engine/hw_atalla.c */ |
| /* |
| * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project |
| * 2000. |
| */ |
| /* ==================================================================== |
| * 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). |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <openssl/crypto.h> |
| #include <openssl/buffer.h> |
| #include <openssl/dso.h> |
| #include <openssl/engine.h> |
| #ifndef OPENSSL_NO_RSA |
| # include <openssl/rsa.h> |
| #endif |
| #ifndef OPENSSL_NO_DSA |
| # include <openssl/dsa.h> |
| #endif |
| #ifndef OPENSSL_NO_DH |
| # include <openssl/dh.h> |
| #endif |
| #include <openssl/bn.h> |
| |
| #ifndef OPENSSL_NO_HW |
| # ifndef OPENSSL_NO_HW_ATALLA |
| |
| # ifdef FLAT_INC |
| # include "atalla.h" |
| # else |
| # include "vendor_defns/atalla.h" |
| # endif |
| |
| # define ATALLA_LIB_NAME "atalla engine" |
| # include "e_atalla_err.c" |
| |
| static int atalla_destroy(ENGINE *e); |
| static int atalla_init(ENGINE *e); |
| static int atalla_finish(ENGINE *e); |
| static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void)); |
| |
| /* BIGNUM stuff */ |
| static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, |
| const BIGNUM *m, BN_CTX *ctx); |
| |
| # ifndef OPENSSL_NO_RSA |
| /* RSA stuff */ |
| static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, |
| BN_CTX *ctx); |
| /* This function is aliased to mod_exp (with the mont stuff dropped). */ |
| static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, |
| const BIGNUM *m, BN_CTX *ctx, |
| BN_MONT_CTX *m_ctx); |
| # endif |
| |
| # ifndef OPENSSL_NO_DSA |
| /* DSA stuff */ |
| static int atalla_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, |
| BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, |
| BN_CTX *ctx, BN_MONT_CTX *in_mont); |
| static int atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a, |
| const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, |
| BN_MONT_CTX *m_ctx); |
| # endif |
| |
| # ifndef OPENSSL_NO_DH |
| /* DH stuff */ |
| /* This function is alised to mod_exp (with the DH and mont dropped). */ |
| static int atalla_mod_exp_dh(const DH *dh, BIGNUM *r, |
| const BIGNUM *a, const BIGNUM *p, |
| const BIGNUM *m, BN_CTX *ctx, |
| BN_MONT_CTX *m_ctx); |
| # endif |
| |
| /* The definitions for control commands specific to this engine */ |
| # define ATALLA_CMD_SO_PATH ENGINE_CMD_BASE |
| static const ENGINE_CMD_DEFN atalla_cmd_defns[] = { |
| {ATALLA_CMD_SO_PATH, |
| "SO_PATH", |
| "Specifies the path to the 'atasi' shared library", |
| ENGINE_CMD_FLAG_STRING}, |
| {0, NULL, NULL, 0} |
| }; |
| |
| # ifndef OPENSSL_NO_RSA |
| /* Our internal RSA_METHOD that we provide pointers to */ |
| static RSA_METHOD atalla_rsa = { |
| "Atalla RSA method", |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| atalla_rsa_mod_exp, |
| atalla_mod_exp_mont, |
| NULL, |
| NULL, |
| 0, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| # endif |
| |
| # ifndef OPENSSL_NO_DSA |
| /* Our internal DSA_METHOD that we provide pointers to */ |
| static DSA_METHOD atalla_dsa = { |
| "Atalla DSA method", |
| NULL, /* dsa_do_sign */ |
| NULL, /* dsa_sign_setup */ |
| NULL, /* dsa_do_verify */ |
| atalla_dsa_mod_exp, /* dsa_mod_exp */ |
| atalla_mod_exp_dsa, /* bn_mod_exp */ |
| NULL, /* init */ |
| NULL, /* finish */ |
| 0, /* flags */ |
| NULL, /* app_data */ |
| NULL, /* dsa_paramgen */ |
| NULL /* dsa_keygen */ |
| }; |
| # endif |
| |
| # ifndef OPENSSL_NO_DH |
| /* Our internal DH_METHOD that we provide pointers to */ |
| static DH_METHOD atalla_dh = { |
| "Atalla DH method", |
| NULL, |
| NULL, |
| atalla_mod_exp_dh, |
| NULL, |
| NULL, |
| 0, |
| NULL, |
| NULL |
| }; |
| # endif |
| |
| /* Constants used when creating the ENGINE */ |
| static const char *engine_atalla_id = "atalla"; |
| static const char *engine_atalla_name = "Atalla hardware engine support"; |
| |
| /* |
| * This internal function is used by ENGINE_atalla() and possibly by the |
| * "dynamic" ENGINE support too |
| */ |
| static int bind_helper(ENGINE *e) |
| { |
| # ifndef OPENSSL_NO_RSA |
| const RSA_METHOD *meth1; |
| # endif |
| # ifndef OPENSSL_NO_DSA |
| const DSA_METHOD *meth2; |
| # endif |
| # ifndef OPENSSL_NO_DH |
| const DH_METHOD *meth3; |
| # endif |
| if (!ENGINE_set_id(e, engine_atalla_id) || |
| !ENGINE_set_name(e, engine_atalla_name) || |
| # ifndef OPENSSL_NO_RSA |
| !ENGINE_set_RSA(e, &atalla_rsa) || |
| # endif |
| # ifndef OPENSSL_NO_DSA |
| !ENGINE_set_DSA(e, &atalla_dsa) || |
| # endif |
| # ifndef OPENSSL_NO_DH |
| !ENGINE_set_DH(e, &atalla_dh) || |
| # endif |
| !ENGINE_set_destroy_function(e, atalla_destroy) || |
| !ENGINE_set_init_function(e, atalla_init) || |
| !ENGINE_set_finish_function(e, atalla_finish) || |
| !ENGINE_set_ctrl_function(e, atalla_ctrl) || |
| !ENGINE_set_cmd_defns(e, atalla_cmd_defns)) |
| return 0; |
| |
| # ifndef OPENSSL_NO_RSA |
| /* |
| * We know that the "PKCS1_SSLeay()" functions hook properly to the |
| * atalla-specific mod_exp and mod_exp_crt so we use those functions. NB: |
| * We don't use ENGINE_openssl() or anything "more generic" because |
| * something like the RSAref code may not hook properly, and if you own |
| * one of these cards then you have the right to do RSA operations on it |
| * anyway! |
| */ |
| meth1 = RSA_PKCS1_SSLeay(); |
| atalla_rsa.rsa_pub_enc = meth1->rsa_pub_enc; |
| atalla_rsa.rsa_pub_dec = meth1->rsa_pub_dec; |
| atalla_rsa.rsa_priv_enc = meth1->rsa_priv_enc; |
| atalla_rsa.rsa_priv_dec = meth1->rsa_priv_dec; |
| # endif |
| |
| # ifndef OPENSSL_NO_DSA |
| /* |
| * Use the DSA_OpenSSL() method and just hook the mod_exp-ish bits. |
| */ |
| meth2 = DSA_OpenSSL(); |
| atalla_dsa.dsa_do_sign = meth2->dsa_do_sign; |
| atalla_dsa.dsa_sign_setup = meth2->dsa_sign_setup; |
| atalla_dsa.dsa_do_verify = meth2->dsa_do_verify; |
| # endif |
| |
| # ifndef OPENSSL_NO_DH |
| /* Much the same for Diffie-Hellman */ |
| meth3 = DH_OpenSSL(); |
| atalla_dh.generate_key = meth3->generate_key; |
| atalla_dh.compute_key = meth3->compute_key; |
| # endif |
| |
| /* Ensure the atalla error handling is set up */ |
| ERR_load_ATALLA_strings(); |
| return 1; |
| } |
| |
| # ifdef OPENSSL_NO_DYNAMIC_ENGINE |
| static ENGINE *engine_atalla(void) |
| { |
| ENGINE *ret = ENGINE_new(); |
| if (!ret) |
| return NULL; |
| if (!bind_helper(ret)) { |
| ENGINE_free(ret); |
| return NULL; |
| } |
| return ret; |
| } |
| |
| void ENGINE_load_atalla(void) |
| { |
| /* Copied from eng_[openssl|dyn].c */ |
| ENGINE *toadd = engine_atalla(); |
| if (!toadd) |
| return; |
| ENGINE_add(toadd); |
| ENGINE_free(toadd); |
| ERR_clear_error(); |
| } |
| # endif |
| |
| /* |
| * This is a process-global DSO handle used for loading and unloading the |
| * Atalla library. NB: This is only set (or unset) during an init() or |
| * finish() call (reference counts permitting) and they're operating with |
| * global locks, so this should be thread-safe implicitly. |
| */ |
| static DSO *atalla_dso = NULL; |
| |
| /* |
| * These are the function pointers that are (un)set when the library has |
| * successfully (un)loaded. |
| */ |
| static tfnASI_GetHardwareConfig *p_Atalla_GetHardwareConfig = NULL; |
| static tfnASI_RSAPrivateKeyOpFn *p_Atalla_RSAPrivateKeyOpFn = NULL; |
| static tfnASI_GetPerformanceStatistics *p_Atalla_GetPerformanceStatistics = |
| NULL; |
| |
| /* |
| * These are the static string constants for the DSO file name and the |
| * function symbol names to bind to. Regrettably, the DSO name on *nix |
| * appears to be "atasi.so" rather than something more consistent like |
| * "libatasi.so". At the time of writing, I'm not sure what the file name on |
| * win32 is but clearly native name translation is not possible (eg |
| * libatasi.so on *nix, and atasi.dll on win32). For the purposes of testing, |
| * I have created a symbollic link called "libatasi.so" so that we can use |
| * native name-translation - a better solution will be needed. |
| */ |
| static const char *ATALLA_LIBNAME = NULL; |
| static const char *get_ATALLA_LIBNAME(void) |
| { |
| if (ATALLA_LIBNAME) |
| return ATALLA_LIBNAME; |
| return "atasi"; |
| } |
| |
| static void free_ATALLA_LIBNAME(void) |
| { |
| if (ATALLA_LIBNAME) |
| OPENSSL_free((void *)ATALLA_LIBNAME); |
| ATALLA_LIBNAME = NULL; |
| } |
| |
| static long set_ATALLA_LIBNAME(const char *name) |
| { |
| free_ATALLA_LIBNAME(); |
| return (((ATALLA_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0); |
| } |
| |
| static const char *ATALLA_F1 = "ASI_GetHardwareConfig"; |
| static const char *ATALLA_F2 = "ASI_RSAPrivateKeyOpFn"; |
| static const char *ATALLA_F3 = "ASI_GetPerformanceStatistics"; |
| |
| /* Destructor (complements the "ENGINE_atalla()" constructor) */ |
| static int atalla_destroy(ENGINE *e) |
| { |
| free_ATALLA_LIBNAME(); |
| /* |
| * Unload the atalla error strings so any error state including our |
| * functs or reasons won't lead to a segfault (they simply get displayed |
| * without corresponding string data because none will be found). |
| */ |
| ERR_unload_ATALLA_strings(); |
| return 1; |
| } |
| |
| /* (de)initialisation functions. */ |
| static int atalla_init(ENGINE *e) |
| { |
| tfnASI_GetHardwareConfig *p1; |
| tfnASI_RSAPrivateKeyOpFn *p2; |
| tfnASI_GetPerformanceStatistics *p3; |
| /* |
| * Not sure of the origin of this magic value, but Ben's code had it and |
| * it seemed to have been working for a few people. :-) |
| */ |
| unsigned int config_buf[1024]; |
| |
| if (atalla_dso != NULL) { |
| ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_ALREADY_LOADED); |
| goto err; |
| } |
| /* |
| * Attempt to load libatasi.so/atasi.dll/whatever. Needs to be changed |
| * unfortunately because the Atalla drivers don't have standard library |
| * names that can be platform-translated well. |
| */ |
| /* |
| * TODO: Work out how to actually map to the names the Atalla drivers |
| * really use - for now a symbollic link needs to be created on the host |
| * system from libatasi.so to atasi.so on unix variants. |
| */ |
| atalla_dso = DSO_load(NULL, get_ATALLA_LIBNAME(), NULL, 0); |
| if (atalla_dso == NULL) { |
| ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_NOT_LOADED); |
| goto err; |
| } |
| if (! |
| (p1 = |
| (tfnASI_GetHardwareConfig *) DSO_bind_func(atalla_dso, ATALLA_F1)) |
| || !(p2 = (tfnASI_RSAPrivateKeyOpFn *) DSO_bind_func(atalla_dso, ATALLA_F2)) |
| || !(p3 = |
| (tfnASI_GetPerformanceStatistics *) DSO_bind_func(atalla_dso, |
| ATALLA_F3))) { |
| ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_NOT_LOADED); |
| goto err; |
| } |
| /* Copy the pointers */ |
| p_Atalla_GetHardwareConfig = p1; |
| p_Atalla_RSAPrivateKeyOpFn = p2; |
| p_Atalla_GetPerformanceStatistics = p3; |
| /* |
| * Perform a basic test to see if there's actually any unit running. |
| */ |
| if (p1(0L, config_buf) != 0) { |
| ATALLAerr(ATALLA_F_ATALLA_INIT, ATALLA_R_UNIT_FAILURE); |
| goto err; |
| } |
| /* Everything's fine. */ |
| return 1; |
| err: |
| if (atalla_dso) |
| DSO_free(atalla_dso); |
| atalla_dso = NULL; |
| p_Atalla_GetHardwareConfig = NULL; |
| p_Atalla_RSAPrivateKeyOpFn = NULL; |
| p_Atalla_GetPerformanceStatistics = NULL; |
| return 0; |
| } |
| |
| static int atalla_finish(ENGINE *e) |
| { |
| free_ATALLA_LIBNAME(); |
| if (atalla_dso == NULL) { |
| ATALLAerr(ATALLA_F_ATALLA_FINISH, ATALLA_R_NOT_LOADED); |
| return 0; |
| } |
| if (!DSO_free(atalla_dso)) { |
| ATALLAerr(ATALLA_F_ATALLA_FINISH, ATALLA_R_UNIT_FAILURE); |
| return 0; |
| } |
| atalla_dso = NULL; |
| p_Atalla_GetHardwareConfig = NULL; |
| p_Atalla_RSAPrivateKeyOpFn = NULL; |
| p_Atalla_GetPerformanceStatistics = NULL; |
| return 1; |
| } |
| |
| static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void)) |
| { |
| int initialised = ((atalla_dso == NULL) ? 0 : 1); |
| switch (cmd) { |
| case ATALLA_CMD_SO_PATH: |
| if (p == NULL) { |
| ATALLAerr(ATALLA_F_ATALLA_CTRL, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| if (initialised) { |
| ATALLAerr(ATALLA_F_ATALLA_CTRL, ATALLA_R_ALREADY_LOADED); |
| return 0; |
| } |
| return set_ATALLA_LIBNAME((const char *)p); |
| default: |
| break; |
| } |
| ATALLAerr(ATALLA_F_ATALLA_CTRL, ATALLA_R_CTRL_COMMAND_NOT_IMPLEMENTED); |
| return 0; |
| } |
| |
| static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, |
| const BIGNUM *m, BN_CTX *ctx) |
| { |
| /* |
| * I need somewhere to store temporary serialised values for use with the |
| * Atalla API calls. A neat cheat - I'll use BIGNUMs from the BN_CTX but |
| * access their arrays directly as byte arrays <grin>. This way I don't |
| * have to clean anything up. |
| */ |
| BIGNUM *modulus; |
| BIGNUM *exponent; |
| BIGNUM *argument; |
| BIGNUM *result; |
| RSAPrivateKey keydata; |
| int to_return, numbytes; |
| |
| modulus = exponent = argument = result = NULL; |
| to_return = 0; /* expect failure */ |
| |
| if (!atalla_dso) { |
| ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_NOT_LOADED); |
| goto err; |
| } |
| /* Prepare the params */ |
| BN_CTX_start(ctx); |
| modulus = BN_CTX_get(ctx); |
| exponent = BN_CTX_get(ctx); |
| argument = BN_CTX_get(ctx); |
| result = BN_CTX_get(ctx); |
| if (!result) { |
| ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_BN_CTX_FULL); |
| goto err; |
| } |
| if (!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, m->top) || |
| !bn_wexpand(argument, m->top) || !bn_wexpand(result, m->top)) { |
| ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_BN_EXPAND_FAIL); |
| goto err; |
| } |
| /* Prepare the key-data */ |
| memset(&keydata, 0, sizeof keydata); |
| numbytes = BN_num_bytes(m); |
| memset(exponent->d, 0, numbytes); |
| memset(modulus->d, 0, numbytes); |
| BN_bn2bin(p, (unsigned char *)exponent->d + numbytes - BN_num_bytes(p)); |
| BN_bn2bin(m, (unsigned char *)modulus->d + numbytes - BN_num_bytes(m)); |
| keydata.privateExponent.data = (unsigned char *)exponent->d; |
| keydata.privateExponent.len = numbytes; |
| keydata.modulus.data = (unsigned char *)modulus->d; |
| keydata.modulus.len = numbytes; |
| /* Prepare the argument */ |
| memset(argument->d, 0, numbytes); |
| memset(result->d, 0, numbytes); |
| BN_bn2bin(a, (unsigned char *)argument->d + numbytes - BN_num_bytes(a)); |
| /* Perform the operation */ |
| if (p_Atalla_RSAPrivateKeyOpFn(&keydata, (unsigned char *)result->d, |
| (unsigned char *)argument->d, |
| keydata.modulus.len) != 0) { |
| ATALLAerr(ATALLA_F_ATALLA_MOD_EXP, ATALLA_R_REQUEST_FAILED); |
| goto err; |
| } |
| /* Convert the response */ |
| BN_bin2bn((unsigned char *)result->d, numbytes, r); |
| to_return = 1; |
| err: |
| BN_CTX_end(ctx); |
| return to_return; |
| } |
| |
| # ifndef OPENSSL_NO_RSA |
| static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, |
| BN_CTX *ctx) |
| { |
| int to_return = 0; |
| |
| if (!atalla_dso) { |
| ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP, ATALLA_R_NOT_LOADED); |
| goto err; |
| } |
| if (!rsa->d || !rsa->n) { |
| ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP, |
| ATALLA_R_MISSING_KEY_COMPONENTS); |
| goto err; |
| } |
| to_return = atalla_mod_exp(r0, I, rsa->d, rsa->n, ctx); |
| err: |
| return to_return; |
| } |
| # endif |
| |
| # ifndef OPENSSL_NO_DSA |
| /* |
| * This code was liberated and adapted from the commented-out code in |
| * dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration (it |
| * doesn't have a CRT form for RSA), this function means that an Atalla |
| * system running with a DSA server certificate can handshake around 5 or 6 |
| * times faster/more than an equivalent system running with RSA. Just check |
| * out the "signs" statistics from the RSA and DSA parts of "openssl speed |
| * -engine atalla dsa1024 rsa1024". |
| */ |
| static int atalla_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, |
| BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, |
| BN_CTX *ctx, BN_MONT_CTX *in_mont) |
| { |
| BIGNUM t; |
| int to_return = 0; |
| |
| BN_init(&t); |
| /* let rr = a1 ^ p1 mod m */ |
| if (!atalla_mod_exp(rr, a1, p1, m, ctx)) |
| goto end; |
| /* let t = a2 ^ p2 mod m */ |
| if (!atalla_mod_exp(&t, a2, p2, m, ctx)) |
| goto end; |
| /* let rr = rr * t mod m */ |
| if (!BN_mod_mul(rr, rr, &t, m, ctx)) |
| goto end; |
| to_return = 1; |
| end: |
| BN_free(&t); |
| return to_return; |
| } |
| |
| static int atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a, |
| const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, |
| BN_MONT_CTX *m_ctx) |
| { |
| return atalla_mod_exp(r, a, p, m, ctx); |
| } |
| # endif |
| |
| # ifndef OPENSSL_NO_RSA |
| /* This function is aliased to mod_exp (with the mont stuff dropped). */ |
| static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, |
| const BIGNUM *m, BN_CTX *ctx, |
| BN_MONT_CTX *m_ctx) |
| { |
| return atalla_mod_exp(r, a, p, m, ctx); |
| } |
| # endif |
| |
| # ifndef OPENSSL_NO_DH |
| /* This function is aliased to mod_exp (with the dh and mont dropped). */ |
| static int atalla_mod_exp_dh(const DH *dh, BIGNUM *r, |
| const BIGNUM *a, const BIGNUM *p, |
| const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) |
| { |
| return atalla_mod_exp(r, a, p, m, ctx); |
| } |
| # endif |
| |
| /* |
| * This stuff is needed if this ENGINE is being compiled into a |
| * self-contained shared-library. |
| */ |
| # ifndef OPENSSL_NO_DYNAMIC_ENGINE |
| static int bind_fn(ENGINE *e, const char *id) |
| { |
| if (id && (strcmp(id, engine_atalla_id) != 0)) |
| return 0; |
| if (!bind_helper(e)) |
| return 0; |
| return 1; |
| } |
| |
| IMPLEMENT_DYNAMIC_CHECK_FN() |
| IMPLEMENT_DYNAMIC_BIND_FN(bind_fn) |
| # endif /* OPENSSL_NO_DYNAMIC_ENGINE */ |
| # endif /* !OPENSSL_NO_HW_ATALLA */ |
| #endif /* !OPENSSL_NO_HW */ |
