openssl/crypto/engine/hw_atalla.c
Richard Levitte 64c4f5732d Add the possibility to load prvate and public keys from an engine and
implement it for nCipher hardware.  The interface in itself should be
clear enough, but the nCipher implementation is currently not the
best when it comes to getting a passphrase from the user.  However,
getting it better is a little hard until a better user interaction
method is create.

Also, use the possibility in req, so we can start to create CSR's with
keys from the nForce box.

WARNING: I've made *no* tests yet, mostly because I didn't implement
this on the machine where I have an nForce box to play with.  All I
know is that it compiles cleanly on Linux...
2000-07-06 18:40:10 +00:00

440 lines
13 KiB
C

/* crypto/engine/hw_atalla.c */
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
* project 2000.
*/
/* ====================================================================
* Copyright (c) 1999 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 <openssl/crypto.h>
#include "cryptlib.h"
#include <openssl/dso.h>
#include "engine_int.h"
#include <openssl/engine.h>
#ifndef NO_HW
#ifndef NO_HW_ATALLA
#include "vendor_defns/atalla.h"
static int atalla_init();
static int atalla_finish();
/* BIGNUM stuff */
static int atalla_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
/* RSA stuff */
static int atalla_rsa_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa);
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int atalla_mod_exp_mont(BIGNUM *r, BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
/* 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);
/* DH stuff */
/* This function is alised to mod_exp (with the DH and mont dropped). */
static int atalla_mod_exp_dh(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
/* 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
};
/* 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 */
};
/* 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
};
/* Our ENGINE structure. */
static ENGINE engine_atalla =
{
"atalla",
"Atalla hardware engine support",
&atalla_rsa,
&atalla_dsa,
&atalla_dh,
NULL,
atalla_mod_exp,
NULL,
atalla_init,
atalla_finish,
NULL, /* no ctrl() */
NULL, /* no load_privkey() */
NULL, /* no load_pubkey() */
0, /* no flags */
0, 0, /* no references */
NULL, NULL /* unlinked */
};
/* As this is only ever called once, there's no need for locking
* (indeed - the lock will already be held by our caller!!!) */
ENGINE *ENGINE_atalla()
{
RSA_METHOD *meth1;
DSA_METHOD *meth2;
DH_METHOD *meth3;
/* 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;
/* 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;
/* Much the same for Diffie-Hellman */
meth3 = DH_OpenSSL();
atalla_dh.generate_key = meth3->generate_key;
atalla_dh.compute_key = meth3->compute_key;
return &engine_atalla;
}
/* 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;
/* (de)initialisation functions. */
static int atalla_init()
{
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)
{
ENGINEerr(ENGINE_F_ATALLA_INIT,ENGINE_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, ATALLA_LIBNAME, NULL,
DSO_FLAG_NAME_TRANSLATION);
if(atalla_dso == NULL)
{
ENGINEerr(ENGINE_F_ATALLA_INIT,ENGINE_R_DSO_FAILURE);
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)))
{
ENGINEerr(ENGINE_F_ATALLA_INIT,ENGINE_R_DSO_FAILURE);
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)
{
ENGINEerr(ENGINE_F_ATALLA_INIT,ENGINE_R_UNIT_FAILURE);
goto err;
}
/* Everything's fine. */
return 1;
err:
if(atalla_dso)
DSO_free(atalla_dso);
p_Atalla_GetHardwareConfig = NULL;
p_Atalla_RSAPrivateKeyOpFn = NULL;
p_Atalla_GetPerformanceStatistics = NULL;
return 0;
}
static int atalla_finish()
{
if(atalla_dso == NULL)
{
ENGINEerr(ENGINE_F_ATALLA_FINISH,ENGINE_R_NOT_LOADED);
return 0;
}
if(!DSO_free(atalla_dso))
{
ENGINEerr(ENGINE_F_ATALLA_FINISH,ENGINE_R_DSO_FAILURE);
return 0;
}
atalla_dso = NULL;
p_Atalla_GetHardwareConfig = NULL;
p_Atalla_RSAPrivateKeyOpFn = NULL;
p_Atalla_GetPerformanceStatistics = NULL;
return 1;
}
static int atalla_mod_exp(BIGNUM *r, 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)
{
ENGINEerr(ENGINE_F_ATALLA_MOD_EXP,ENGINE_R_NOT_LOADED);
goto err;
}
/* Prepare the params */
modulus = BN_CTX_get(ctx);
exponent = BN_CTX_get(ctx);
argument = BN_CTX_get(ctx);
result = BN_CTX_get(ctx);
if(!modulus || !exponent || !argument || !result)
{
ENGINEerr(ENGINE_F_ATALLA_MOD_EXP,ENGINE_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))
{
ENGINEerr(ENGINE_F_ATALLA_MOD_EXP,ENGINE_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)
{
ENGINEerr(ENGINE_F_ATALLA_MOD_EXP,ENGINE_R_REQUEST_FAILED);
goto err;
}
/* Convert the response */
BN_bin2bn((unsigned char *)result->d, numbytes, r);
to_return = 1;
err:
if(modulus) ctx->tos--;
if(exponent) ctx->tos--;
if(argument) ctx->tos--;
if(result) ctx->tos--;
return to_return;
}
static int atalla_rsa_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
{
BN_CTX *ctx = NULL;
int to_return = 0;
if(!atalla_dso)
{
ENGINEerr(ENGINE_F_ATALLA_RSA_MOD_EXP,ENGINE_R_NOT_LOADED);
goto err;
}
if((ctx = BN_CTX_new()) == NULL)
goto err;
if(!rsa->d || !rsa->n)
{
ENGINEerr(ENGINE_F_ATALLA_RSA_MOD_EXP,ENGINE_R_MISSING_KEY_COMPONENTS);
goto err;
}
to_return = atalla_mod_exp(r0, I, rsa->d, rsa->n, ctx);
err:
if(ctx)
BN_CTX_free(ctx);
return to_return;
}
/* 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);
}
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int atalla_mod_exp_mont(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);
}
/* This function is aliased to mod_exp (with the dh and mont dropped). */
static int atalla_mod_exp_dh(DH *dh, 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 /* !NO_HW_ATALLA */
#endif /* !NO_HW */