diff options
Diffstat (limited to 'openssl/engines/e_atalla.c')
| -rw-r--r-- | openssl/engines/e_atalla.c | 607 |
1 files changed, 607 insertions, 0 deletions
diff --git a/openssl/engines/e_atalla.c b/openssl/engines/e_atalla.c new file mode 100644 index 000000000..fabaa86a5 --- /dev/null +++ b/openssl/engines/e_atalla.c @@ -0,0 +1,607 @@ +/* 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 */ |