/* 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 */