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e_chil.c
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e_chil.c
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/*
* Written by Richard Levitte ([email protected]), Geoff Thorpe
* ([email protected]) and Dr Stephen N Henson ([email protected]) for
* the OpenSSL project 2000.
* Updated by Peter Botha ([email protected]) for OpenSSL 1.1
*/
/* ====================================================================
* 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
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ltdl.h>
#include <openssl/crypto.h>
#include <openssl/pem.h>
#include <openssl/engine.h>
#include <openssl/ui.h>
#include <openssl/rand.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DH
# include <openssl/dh.h>
#endif
#include <openssl/bn.h>
#include "config.h"
/*-
* Attribution notice: nCipher have said several times that it's OK for
* us to implement a general interface to their boxes, and recently declared
* their HWCryptoHook to be public, and therefore available for us to use.
* Thanks, nCipher.
*
* The hwcryptohook.h included here is from May 2000.
* [Richard Levitte]
*/
#include "vendor_defns/hwcryptohook.h"
#define HWCRHK_LIB_NAME "CHIL engine"
#include "e_chil_err.c"
static CRYPTO_RWLOCK *chil_lock;
static int hwcrhk_destroy(ENGINE *e);
static int hwcrhk_init(ENGINE *e);
static int hwcrhk_finish(ENGINE *e);
static int hwcrhk_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
/* Functions to handle mutexes */
static int hwcrhk_mutex_init(HWCryptoHook_Mutex *,
HWCryptoHook_CallerContext *);
static int hwcrhk_mutex_lock(HWCryptoHook_Mutex *);
static void hwcrhk_mutex_unlock(HWCryptoHook_Mutex *);
static void hwcrhk_mutex_destroy(HWCryptoHook_Mutex *);
/* BIGNUM stuff */
static int hwcrhk_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
#ifndef OPENSSL_NO_RSA
/* RSA stuff */
static int hwcrhk_rsa_mod_exp(BIGNUM *r, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx);
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int hwcrhk_rsa_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
static int hwcrhk_rsa_finish(RSA *rsa);
#endif
#ifndef OPENSSL_NO_DH
/* DH stuff */
/* This function is alised to mod_exp (with the DH and mont dropped). */
static int hwcrhk_dh_bn_mod_exp(const DH *dh, BIGNUM *r,
const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
#endif
/* RAND stuff */
static int hwcrhk_rand_bytes(unsigned char *buf, int num);
static int hwcrhk_rand_status(void);
/* KM stuff */
static EVP_PKEY *hwcrhk_load_privkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method,
void *callback_data);
static EVP_PKEY *hwcrhk_load_pubkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method,
void *callback_data);
/* Interaction stuff */
static int hwcrhk_insert_card(const char *prompt_info,
const char *wrong_info,
HWCryptoHook_PassphraseContext * ppctx,
HWCryptoHook_CallerContext * cactx);
static int hwcrhk_get_pass(const char *prompt_info,
int *len_io, char *buf,
HWCryptoHook_PassphraseContext * ppctx,
HWCryptoHook_CallerContext * cactx);
static void hwcrhk_log_message(void *logstr, const char *message);
/* MPI stuff */
#define HWCRHK_MPI_DEFAULT_ALLOC_SIZE 64 /* = 512 bits */
#define HWCRHK_MPI_RSA_ALLOC_SIZE 1024 /* = 8192 bits */
static HWCryptoHook_MPI *hwcrhk_mpi_new();
static HWCryptoHook_MPI *hwcrhk_mpi_alloc(size_t size);
static HWCryptoHook_MPI *hwcrhk_mpi_resize(HWCryptoHook_MPI *mpi, size_t size);
static void hwcrhk_mpi_free(HWCryptoHook_MPI *mpi);
static HWCryptoHook_MPI *hwcrhk_mpi_bn2mpi(const BIGNUM *bn);
static BIGNUM *hwcrhk_mpi_mpi2bn(const HWCryptoHook_MPI *mpi, BIGNUM *ret);
/* The definitions for control commands specific to this engine */
#define HWCRHK_CMD_SO_PATH ENGINE_CMD_BASE
#define HWCRHK_CMD_FORK_CHECK (ENGINE_CMD_BASE + 1)
#define HWCRHK_CMD_THREAD_LOCKING (ENGINE_CMD_BASE + 2)
#define HWCRHK_CMD_SET_USER_INTERFACE (ENGINE_CMD_BASE + 3)
#define HWCRHK_CMD_SET_CALLBACK_DATA (ENGINE_CMD_BASE + 4)
static const ENGINE_CMD_DEFN hwcrhk_cmd_defns[] = {
{HWCRHK_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the 'hwcrhk' shared library",
ENGINE_CMD_FLAG_STRING},
{HWCRHK_CMD_FORK_CHECK,
"FORK_CHECK",
"Turns fork() checking on (non-zero) or off (zero)",
ENGINE_CMD_FLAG_NUMERIC},
{HWCRHK_CMD_THREAD_LOCKING,
"THREAD_LOCKING",
"Turns thread-safe locking on (zero) or off (non-zero)",
ENGINE_CMD_FLAG_NUMERIC},
{HWCRHK_CMD_SET_USER_INTERFACE,
"SET_USER_INTERFACE",
"Set the global user interface (internal)",
ENGINE_CMD_FLAG_INTERNAL},
{HWCRHK_CMD_SET_CALLBACK_DATA,
"SET_CALLBACK_DATA",
"Set the global user interface extra data (internal)",
ENGINE_CMD_FLAG_INTERNAL},
{0, NULL, NULL, 0}
};
#ifndef OPENSSL_NO_RSA
static RSA_METHOD *hwcrhk_rsa = NULL;
#endif
#ifndef OPENSSL_NO_DH
static DH_METHOD *hwcrhk_dh = NULL;
#endif
static RAND_METHOD hwcrhk_rand = {
/* "CHIL RAND method", */
NULL,
hwcrhk_rand_bytes,
NULL,
NULL,
hwcrhk_rand_bytes,
hwcrhk_rand_status,
};
/* Constants used when creating the ENGINE */
static const char *engine_hwcrhk_id = "chil";
static const char *engine_hwcrhk_name = "CHIL hardware engine support";
/* Compatibility hack, the dynamic library uses this form in the path */
static const char *engine_hwcrhk_id_alt = "ncipher";
/* Internal stuff for HWCryptoHook */
/* Some structures needed for proper use of thread locks */
/*
* hwcryptohook.h has some typedefs that turn struct HWCryptoHook_MutexValue
* into HWCryptoHook_Mutex
*/
struct HWCryptoHook_MutexValue {
CRYPTO_RWLOCK *lock;
};
/*
* hwcryptohook.h has some typedefs that turn struct
* HWCryptoHook_PassphraseContextValue into HWCryptoHook_PassphraseContext
*/
struct HWCryptoHook_PassphraseContextValue {
UI_METHOD *ui_method;
void *callback_data;
};
/*
* hwcryptohook.h has some typedefs that turn struct
* HWCryptoHook_CallerContextValue into HWCryptoHook_CallerContext
*/
struct HWCryptoHook_CallerContextValue {
pem_password_cb *password_callback; /* Deprecated! Only present for
* backward compatibility! */
UI_METHOD *ui_method;
void *callback_data;
};
static BIO *logstream = NULL;
static int disable_mutex_callbacks = 0;
/*
* One might wonder why these are needed, since one can pass down at least a
* UI_METHOD and a pointer to callback data to the key-loading functions. The
* thing is that the ModExp and RSAImmed functions can load keys as well, if
* the data they get is in a special, nCipher-defined format (hint: if you
* look at the private exponent of the RSA data as a string, you'll see this
* string: "nCipher KM tool key id", followed by some bytes, followed a key
* identity string, followed by more bytes. This happens when you use
* "embed" keys instead of "hwcrhk" keys). Unfortunately, those functions do
* not take any passphrase or caller context, and our functions can't really
* take any callback data either. Still, the "insert_card" and
* "get_passphrase" callbacks may be called down the line, and will need to
* know what user interface callbacks to call, and having callback data from
* the application may be a nice thing as well, so we need to keep track of
* that globally.
*/
static HWCryptoHook_CallerContext password_context = { NULL, NULL, NULL };
/* Stuff to pass to the HWCryptoHook library */
static HWCryptoHook_InitInfo hwcrhk_globals = {
HWCryptoHook_InitFlags_SimpleForkCheck, /* Flags */
&logstream, /* logstream */
sizeof(BN_ULONG), /* limbsize */
0, /* mslimb first: false for BNs */
-1, /* msbyte first: use native */
0, /* Max mutexes, 0 = no small limit */
0, /* Max simultaneous, 0 = default */
/*
* The next few are mutex stuff: we write wrapper functions around the OS
* mutex functions. We initialise them to 0 here, and change that to
* actual function pointers in hwcrhk_init() if dynamic locks are
* supported (that is, if the application programmer has made sure of
* setting up callbacks bafore starting this engine) *and* if
* disable_mutex_callbacks hasn't been set by a call to
* ENGINE_ctrl(ENGINE_CTRL_CHIL_NO_LOCKING).
*/
sizeof(HWCryptoHook_Mutex),
0,
0,
0,
0,
/*
* The next few are condvar stuff: we write wrapper functions round the
* OS functions. Currently not implemented and not and absolute
* necessity even in threaded programs, therefore 0'ed. Will hopefully
* be implemented some day, since it enhances the efficiency of
* HWCryptoHook.
*/
0, /* sizeof(HWCryptoHook_CondVar), */
0, /* hwcrhk_cv_init, */
0, /* hwcrhk_cv_wait, */
0, /* hwcrhk_cv_signal, */
0, /* hwcrhk_cv_broadcast, */
0, /* hwcrhk_cv_destroy, */
hwcrhk_get_pass, /* pass phrase */
hwcrhk_insert_card, /* insert a card */
hwcrhk_log_message /* Log message */
};
/* Now, to our own code */
/*
* This internal function is used by ENGINE_chil() and possibly by the
* "dynamic" ENGINE support too
*/
static int bind_helper(ENGINE *e)
{
#ifndef OPENSSL_NO_RSA
const RSA_METHOD *ossl_rsa_meth;
#endif
#ifndef OPENSSL_NO_DH
const DH_METHOD *ossl_dh_meth;
#endif
chil_lock = CRYPTO_THREAD_lock_new();
if (chil_lock == NULL)
goto err;
#ifndef OPENSSL_NO_RSA
/* Setup RSA_METHOD */
hwcrhk_rsa = RSA_meth_new("CHIL RSA method", 0);
if (hwcrhk_rsa == NULL)
goto err;
/*
* We know that the "PKCS1_OpenSSL()" functions hook properly to the
* cswift-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!
*/
ossl_rsa_meth = RSA_PKCS1_OpenSSL();
if ( !RSA_meth_set_pub_enc(hwcrhk_rsa,
RSA_meth_get_pub_enc(ossl_rsa_meth))
|| !RSA_meth_set_pub_dec(hwcrhk_rsa,
RSA_meth_get_pub_dec(ossl_rsa_meth))
|| !RSA_meth_set_priv_enc(hwcrhk_rsa,
RSA_meth_get_priv_enc(ossl_rsa_meth))
|| !RSA_meth_set_priv_dec(hwcrhk_rsa,
RSA_meth_get_priv_dec(ossl_rsa_meth))
|| !RSA_meth_set_mod_exp(hwcrhk_rsa, hwcrhk_rsa_mod_exp)
|| !RSA_meth_set_bn_mod_exp(hwcrhk_rsa, hwcrhk_rsa_bn_mod_exp)
|| !RSA_meth_set_finish(hwcrhk_rsa, hwcrhk_rsa_finish)) {
goto err;
}
#endif
#ifndef OPENSSL_NO_DH
/* Setup DH Method */
hwcrhk_dh = DH_meth_new("CHIL DH method", 0);
if (hwcrhk_dh == NULL)
goto err;
/* Much the same for Diffie-Hellman */
ossl_dh_meth = DH_OpenSSL();
if ( !DH_meth_set_generate_key(hwcrhk_dh,
DH_meth_get_generate_key(ossl_dh_meth))
|| !DH_meth_set_compute_key(hwcrhk_dh,
DH_meth_get_compute_key(ossl_dh_meth))
|| !DH_meth_set_bn_mod_exp(hwcrhk_dh, hwcrhk_dh_bn_mod_exp)) {
goto err;
}
#endif
if (!ENGINE_set_id(e, engine_hwcrhk_id) ||
!ENGINE_set_name(e, engine_hwcrhk_name) ||
!ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL) ||
#ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, hwcrhk_rsa) ||
#endif
#ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, hwcrhk_dh) ||
#endif
!ENGINE_set_RAND(e, &hwcrhk_rand) ||
!ENGINE_set_destroy_function(e, hwcrhk_destroy) ||
!ENGINE_set_init_function(e, hwcrhk_init) ||
!ENGINE_set_finish_function(e, hwcrhk_finish) ||
!ENGINE_set_ctrl_function(e, hwcrhk_ctrl) ||
!ENGINE_set_load_privkey_function(e, hwcrhk_load_privkey) ||
!ENGINE_set_load_pubkey_function(e, hwcrhk_load_pubkey) ||
!ENGINE_set_cmd_defns(e, hwcrhk_cmd_defns)) {
goto err;
}
/* Ensure the hwcrhk error handling is set up */
ERR_load_HWCRHK_strings();
return 1;
err:
HWCRHKerr(HWCRHK_F_BIND_HELPER, ERR_R_MALLOC_FAILURE);
CRYPTO_THREAD_lock_free(chil_lock);
chil_lock = NULL;
#ifndef OPENSSL_NO_RSA
RSA_meth_free(hwcrhk_rsa);
hwcrhk_rsa = NULL;
#endif
#ifndef OPENSSL_NO_DH
DH_meth_free(hwcrhk_dh);
hwcrhk_dh = NULL;
#endif
return 0;
}
/*
* This is a process-global DSO handle used for loading and unloading the
* HWCryptoHook 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 lt_dlhandle hwcrhk_dso = NULL;
static HWCryptoHook_ContextHandle hwcrhk_context = 0;
#ifndef OPENSSL_NO_RSA
/* Index for KM handle. Not really used yet. */
static int hndidx_rsa = -1;
#endif
/*
* These are the function pointers that are (un)set when the library has
* successfully (un)loaded.
*/
static HWCryptoHook_Init_t *p_hwcrhk_Init = NULL;
static HWCryptoHook_Finish_t *p_hwcrhk_Finish = NULL;
static HWCryptoHook_ModExp_t *p_hwcrhk_ModExp = NULL;
#ifndef OPENSSL_NO_RSA
static HWCryptoHook_RSA_t *p_hwcrhk_RSA = NULL;
static HWCryptoHook_RSALoadKey_t *p_hwcrhk_RSALoadKey = NULL;
static HWCryptoHook_RSAGetPublicKey_t *p_hwcrhk_RSAGetPublicKey = NULL;
static HWCryptoHook_RSAUnloadKey_t *p_hwcrhk_RSAUnloadKey = NULL;
#endif
static HWCryptoHook_RandomBytes_t *p_hwcrhk_RandomBytes = NULL;
static HWCryptoHook_ModExpCRT_t *p_hwcrhk_ModExpCRT = NULL;
/* Used in the DSO operations. */
static char *HWCRHK_LIBNAME = NULL;
static void free_HWCRHK_LIBNAME(void)
{
OPENSSL_free(HWCRHK_LIBNAME);
HWCRHK_LIBNAME = NULL;
}
static const char *get_HWCRHK_LIBNAME(void)
{
if (HWCRHK_LIBNAME)
return HWCRHK_LIBNAME;
return "nfhwcrhk";
}
static long set_HWCRHK_LIBNAME(const char *name)
{
free_HWCRHK_LIBNAME();
return (((HWCRHK_LIBNAME = OPENSSL_strdup(name)) != NULL) ? 1 : 0);
}
static const char *n_hwcrhk_Init = "HWCryptoHook_Init";
static const char *n_hwcrhk_Finish = "HWCryptoHook_Finish";
static const char *n_hwcrhk_ModExp = "HWCryptoHook_ModExp";
#ifndef OPENSSL_NO_RSA
static const char *n_hwcrhk_RSA = "HWCryptoHook_RSA";
static const char *n_hwcrhk_RSALoadKey = "HWCryptoHook_RSALoadKey";
static const char *n_hwcrhk_RSAGetPublicKey = "HWCryptoHook_RSAGetPublicKey";
static const char *n_hwcrhk_RSAUnloadKey = "HWCryptoHook_RSAUnloadKey";
#endif
static const char *n_hwcrhk_RandomBytes = "HWCryptoHook_RandomBytes";
static const char *n_hwcrhk_ModExpCRT = "HWCryptoHook_ModExpCRT";
/*
* HWCryptoHook library functions and mechanics - these are used by the
* higher-level functions further down. NB: As and where there's no error
* checking, take a look lower down where these functions are called, the
* checking and error handling is probably down there.
*/
/* utility function to obtain a context */
static int get_context(HWCryptoHook_ContextHandle * hac,
HWCryptoHook_CallerContext * cac)
{
char tempbuf[1024];
HWCryptoHook_ErrMsgBuf rmsg;
rmsg.buf = tempbuf;
rmsg.size = sizeof(tempbuf);
*hac = p_hwcrhk_Init(&hwcrhk_globals, sizeof(hwcrhk_globals), &rmsg, cac);
if (!*hac)
return 0;
return 1;
}
/* similarly to release one. */
static void release_context(HWCryptoHook_ContextHandle hac)
{
p_hwcrhk_Finish(hac);
}
/* Destructor (complements the "ENGINE_chil()" constructor) */
static int hwcrhk_destroy(ENGINE *e)
{
free_HWCRHK_LIBNAME();
ERR_unload_HWCRHK_strings();
CRYPTO_THREAD_lock_free(chil_lock);
return 1;
}
/* (de)initialisation functions. */
static int hwcrhk_init(ENGINE *e)
{
HWCryptoHook_Init_t *p1;
HWCryptoHook_Finish_t *p2;
HWCryptoHook_ModExp_t *p3;
#ifndef OPENSSL_NO_RSA
HWCryptoHook_RSA_t *p4;
HWCryptoHook_RSALoadKey_t *p5;
HWCryptoHook_RSAGetPublicKey_t *p6;
HWCryptoHook_RSAUnloadKey_t *p7;
#endif
HWCryptoHook_RandomBytes_t *p8;
HWCryptoHook_ModExpCRT_t *p9;
const char *hwcrhk_name = get_HWCRHK_LIBNAME();
char *hwcrhk_libname = NULL;
if (hwcrhk_dso != NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_ALREADY_LOADED);
goto err;
}
if (lt_dlinit() != 0) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, ERR_R_SYS_LIB);
ERR_add_error_data(2, "ltdl message: ", lt_dlerror());
goto err;
}
if (strncmp(hwcrhk_name, "lib", 3) != 0) {
/*
* hwcrhk_libname is the same as hwcrhk_name, but with "lib" prefixed.
* Make space for it
*/
if ((hwcrhk_libname = malloc(strlen(hwcrhk_name) + 4)) == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, ERR_R_MALLOC_FAILURE);
goto err;
}
strcpy(hwcrhk_libname, "lib");
strcat(hwcrhk_libname, hwcrhk_name);
}
/* Attempt to load libnfhwcrhk.so/nfhwcrhk.dll/whatever. */
if (hwcrhk_libname != NULL) {
hwcrhk_dso = lt_dlopenext(hwcrhk_libname);
}
if (hwcrhk_dso == NULL && (hwcrhk_dso = lt_dlopenext(hwcrhk_name)) == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_DSO_FAILURE);
goto err;
}
free(hwcrhk_libname);
#define BINDIT(t, name) (t *)lt_dlsym(hwcrhk_dso, name)
if ((p1 = BINDIT(HWCryptoHook_Init_t, n_hwcrhk_Init)) == NULL
|| (p2 = BINDIT(HWCryptoHook_Finish_t, n_hwcrhk_Finish)) == NULL
|| (p3 = BINDIT(HWCryptoHook_ModExp_t, n_hwcrhk_ModExp)) == NULL
#ifndef OPENSSL_NO_RSA
|| (p4 = BINDIT(HWCryptoHook_RSA_t, n_hwcrhk_RSA)) == NULL
|| (p5 = BINDIT(HWCryptoHook_RSALoadKey_t, n_hwcrhk_RSALoadKey)) == NULL
|| (p6 = BINDIT(HWCryptoHook_RSAGetPublicKey_t, n_hwcrhk_RSAGetPublicKey)) == NULL
|| (p7 = BINDIT(HWCryptoHook_RSAUnloadKey_t, n_hwcrhk_RSAUnloadKey)) == NULL
#endif
|| (p8 = BINDIT(HWCryptoHook_RandomBytes_t, n_hwcrhk_RandomBytes)) == NULL
|| (p9 = BINDIT(HWCryptoHook_ModExpCRT_t, n_hwcrhk_ModExpCRT)) == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_DSO_FAILURE);
goto err;
}
/* Copy the pointers */
p_hwcrhk_Init = p1;
p_hwcrhk_Finish = p2;
p_hwcrhk_ModExp = p3;
#ifndef OPENSSL_NO_RSA
p_hwcrhk_RSA = p4;
p_hwcrhk_RSALoadKey = p5;
p_hwcrhk_RSAGetPublicKey = p6;
p_hwcrhk_RSAUnloadKey = p7;
#endif
p_hwcrhk_RandomBytes = p8;
p_hwcrhk_ModExpCRT = p9;
/*
* Check if the application decided to support dynamic locks, and if it
* does, use them.
*/
if (disable_mutex_callbacks == 0) {
hwcrhk_globals.mutex_init = hwcrhk_mutex_init;
hwcrhk_globals.mutex_acquire = hwcrhk_mutex_lock;
hwcrhk_globals.mutex_release = hwcrhk_mutex_unlock;
hwcrhk_globals.mutex_destroy = hwcrhk_mutex_destroy;
}
/*
* Try and get a context - if not, we may have a DSO but no accelerator!
*/
if (!get_context(&hwcrhk_context, &password_context)) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_UNIT_FAILURE);
goto err;
}
/* Everything's fine. */
#ifndef OPENSSL_NO_RSA
if (hndidx_rsa == -1) {
hndidx_rsa = RSA_get_ex_new_index(0,
"nFast HWCryptoHook RSA key handle",
NULL, NULL, NULL);
}
#endif
return 1;
err:
free(hwcrhk_libname);
if (hwcrhk_dso != NULL) {
lt_dlclose(hwcrhk_dso);
hwcrhk_dso = NULL;
}
lt_dlexit();
p_hwcrhk_Init = NULL;
p_hwcrhk_Finish = NULL;
p_hwcrhk_ModExp = NULL;
#ifndef OPENSSL_NO_RSA
p_hwcrhk_RSA = NULL;
p_hwcrhk_RSALoadKey = NULL;
p_hwcrhk_RSAGetPublicKey = NULL;
p_hwcrhk_RSAUnloadKey = NULL;
#endif
p_hwcrhk_RandomBytes = NULL;
p_hwcrhk_ModExpCRT = NULL;
return 0;
}
static int hwcrhk_finish(ENGINE *e)
{
int to_return = 0;
free_HWCRHK_LIBNAME();
if (hwcrhk_dso == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_FINISH, HWCRHK_R_NOT_LOADED);
goto err;
}
release_context(hwcrhk_context);
if (lt_dlclose(hwcrhk_dso) != 0) {
HWCRHKerr(HWCRHK_F_HWCRHK_FINISH, HWCRHK_R_DSO_FAILURE);
goto err;
}
to_return = 1;
err:
lt_dlexit();
BIO_free(logstream);
hwcrhk_dso = NULL;
p_hwcrhk_Init = NULL;
p_hwcrhk_Finish = NULL;
p_hwcrhk_ModExp = NULL;
#ifndef OPENSSL_NO_RSA
p_hwcrhk_RSA = NULL;
p_hwcrhk_RSALoadKey = NULL;
p_hwcrhk_RSAGetPublicKey = NULL;
p_hwcrhk_RSAUnloadKey = NULL;
#endif
p_hwcrhk_RandomBytes = NULL;
p_hwcrhk_ModExpCRT = NULL;
return to_return;
}
static int hwcrhk_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int to_return = 1;
switch (cmd) {
case HWCRHK_CMD_SO_PATH:
if (hwcrhk_dso) {
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL, HWCRHK_R_ALREADY_LOADED);
return 0;
}
if (p == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
return set_HWCRHK_LIBNAME((const char *)p);
case ENGINE_CTRL_SET_LOGSTREAM:
{
BIO *bio = (BIO *)p;
CRYPTO_THREAD_write_lock(chil_lock);
BIO_free(logstream);
logstream = NULL;
if (BIO_up_ref(bio))
logstream = bio;
else
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL, HWCRHK_R_BIO_WAS_FREED);
}
CRYPTO_THREAD_unlock(chil_lock);
break;
case ENGINE_CTRL_SET_PASSWORD_CALLBACK:
CRYPTO_THREAD_write_lock(chil_lock);
password_context.password_callback = (pem_password_cb *)f;
CRYPTO_THREAD_unlock(chil_lock);
break;
case ENGINE_CTRL_SET_USER_INTERFACE:
case HWCRHK_CMD_SET_USER_INTERFACE:
CRYPTO_THREAD_write_lock(chil_lock);
password_context.ui_method = (UI_METHOD *)p;
CRYPTO_THREAD_unlock(chil_lock);
break;
case ENGINE_CTRL_SET_CALLBACK_DATA:
case HWCRHK_CMD_SET_CALLBACK_DATA:
CRYPTO_THREAD_write_lock(chil_lock);
password_context.callback_data = p;
CRYPTO_THREAD_unlock(chil_lock);
break;
/*
* this enables or disables the "SimpleForkCheck" flag used in the
* initialisation structure.
*/
case ENGINE_CTRL_CHIL_SET_FORKCHECK:
case HWCRHK_CMD_FORK_CHECK:
CRYPTO_THREAD_write_lock(chil_lock);
if (i)
hwcrhk_globals.flags |= HWCryptoHook_InitFlags_SimpleForkCheck;
else
hwcrhk_globals.flags &= ~HWCryptoHook_InitFlags_SimpleForkCheck;
CRYPTO_THREAD_unlock(chil_lock);
break;
/*
* This will prevent the initialisation function from "installing"
* the mutex-handling callbacks, even if they are available from
* within the library (or were provided to the library from the
* calling application). This is to remove any baggage for
* applications not using multithreading.
*/
case ENGINE_CTRL_CHIL_NO_LOCKING:
CRYPTO_THREAD_write_lock(chil_lock);
disable_mutex_callbacks = 1;
CRYPTO_THREAD_unlock(chil_lock);
break;
case HWCRHK_CMD_THREAD_LOCKING:
CRYPTO_THREAD_write_lock(chil_lock);
disable_mutex_callbacks = ((i == 0) ? 0 : 1);
CRYPTO_THREAD_unlock(chil_lock);
break;
/* The command isn't understood by this engine */
default:
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL,
HWCRHK_R_CTRL_COMMAND_NOT_IMPLEMENTED);
to_return = 0;
break;
}
return to_return;
}
static HWCryptoHook_MPI *hwcrhk_mpi_new(void)
{
return hwcrhk_mpi_alloc(HWCRHK_MPI_DEFAULT_ALLOC_SIZE);
}
static HWCryptoHook_MPI *hwcrhk_mpi_alloc(size_t size)
{
HWCryptoHook_MPI *mpi;
mpi = OPENSSL_malloc(sizeof(HWCryptoHook_MPI) + size);
if (mpi == NULL) {
return NULL;
}
mpi->buf = ((unsigned char *)mpi) + sizeof(HWCryptoHook_MPI);
mpi->size = size;
return mpi;
}
static HWCryptoHook_MPI *hwcrhk_mpi_resize(HWCryptoHook_MPI *mpi, size_t size)
{
if (mpi == NULL) {
return NULL;
}
if (size <= HWCRHK_MPI_DEFAULT_ALLOC_SIZE) {
mpi->size = size;
return mpi;
}
mpi = OPENSSL_realloc(mpi, sizeof(HWCryptoHook_MPI) + size);
if (mpi == NULL) {
return NULL;
}
mpi->buf = ((unsigned char *)mpi) + sizeof(HWCryptoHook_MPI);
mpi->size = size;
return mpi;
}
static void hwcrhk_mpi_free(HWCryptoHook_MPI *mpi)
{
if (mpi != NULL) {
OPENSSL_free(mpi);
}
}
static HWCryptoHook_MPI *hwcrhk_mpi_bn2mpi(const BIGNUM *bn)
{
HWCryptoHook_MPI *mpi = NULL;
size_t mpi_size;
if (bn == NULL) {
return NULL;
}
/* round up to the nearest BN_BYTES */
mpi_size = ((size_t)(BN_num_bytes(bn) + BN_BYTES - 1) / BN_BYTES) * BN_BYTES;
mpi = hwcrhk_mpi_alloc(mpi_size);
if (mpi == NULL) {
goto err;
}
#ifdef L_ENDIAN
if (BN_bn2lebinpad(bn, mpi->buf, mpi_size) != mpi_size) {
#else
if (BN_bn2binpad(bn, mpi->buf, mpi_size) != mpi_size) {
#endif
goto err;
}
return mpi;
err:
hwcrhk_mpi_free(mpi);
return NULL;
}
static BIGNUM *hwcrhk_mpi_mpi2bn(const HWCryptoHook_MPI *mpi, BIGNUM *ret)
{
if (mpi == NULL || mpi->buf == NULL) {
return NULL;
}
#ifdef L_ENDIAN
return BN_lebin2bn(mpi->buf, mpi->size, ret);
#else
return BN_bin2bn(mpi->buf, mpi->size, ret);
#endif
}
static EVP_PKEY *hwcrhk_load_privkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method,
void *callback_data)
{
EVP_PKEY *res = NULL;
#ifndef OPENSSL_NO_RSA
RSA *rtmp = NULL;
BIGNUM *bn_e = NULL, *bn_n = NULL;
HWCryptoHook_MPI *e = NULL, *n = NULL;
HWCryptoHook_RSAKeyHandle *hptr;
char tempbuf[1024];
HWCryptoHook_ErrMsgBuf rmsg;
int ret = 0, attempt;
HWCryptoHook_PassphraseContext ppctx;
rmsg.buf = tempbuf;
rmsg.size = sizeof(tempbuf);
#endif
if (!hwcrhk_context) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_NOT_INITIALISED);
goto err;
}
#ifndef OPENSSL_NO_RSA
hptr = OPENSSL_malloc(sizeof(*hptr));
if (hptr == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
goto err;
}
ppctx.ui_method = ui_method;
ppctx.callback_data = callback_data;
if (p_hwcrhk_RSALoadKey(hwcrhk_context, key_id, hptr, &rmsg, &ppctx)) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_CHIL_ERROR);
ERR_add_error_data(1, rmsg.buf);
goto err;
}
if (!*hptr) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_NO_KEY);
goto err;
}
/* guess the starting size of n */
n = hwcrhk_mpi_alloc(HWCRHK_MPI_RSA_ALLOC_SIZE);
e = hwcrhk_mpi_new();
if (!n || !e) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY,
ERR_R_MALLOC_FAILURE);
goto err;
}
for (attempt = 0; attempt < 2; ++attempt) {
ret = p_hwcrhk_RSAGetPublicKey(*hptr, n, e, &rmsg);
if (ret != HWCRYPTOHOOK_ERROR_MPISIZE)
break;
/* the guess was wrong, so resize and re-attempt */
n = hwcrhk_mpi_resize(n, n->size);
e = hwcrhk_mpi_resize(e, e->size);
if (n == NULL || e == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
goto err;
}
};
if (ret < 0) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_CHIL_ERROR);
ERR_add_error_data(1, rmsg.buf);
goto err;
}
bn_e = hwcrhk_mpi_mpi2bn(e, NULL);
bn_n = hwcrhk_mpi_mpi2bn(n, NULL);
hwcrhk_mpi_free(e);
hwcrhk_mpi_free(n);
e = NULL;
n = NULL;
if (bn_e == NULL || bn_n == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
goto err;
}
rtmp = RSA_new_method(eng);
res = EVP_PKEY_new();
if (rtmp == NULL || res == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
goto err;
}
RSA_set_ex_data(rtmp, hndidx_rsa, (char *)hptr);
RSA_set0_key(rtmp, bn_n, bn_e, NULL);
RSA_set_flags(rtmp, RSA_FLAG_EXT_PKEY);
EVP_PKEY_assign_RSA(res, rtmp);
#endif
if (res == NULL)
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY,
HWCRHK_R_PRIVATE_KEY_ALGORITHMS_DISABLED);
return res;
err:
#ifndef OPENSSL_NO_RSA
BN_free(bn_e);
BN_free(bn_n);
hwcrhk_mpi_free(e);
hwcrhk_mpi_free(n);
EVP_PKEY_free(res);
RSA_free(rtmp);
#endif
return NULL;
}