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openssl/engines/e_aep.c
Rich Salz 75ebbd9aa4 Use p==NULL not !p (in if statements, mainly) 
Reviewed-by: Tim Hudson <tjh@openssl.org>
2015-05-11 10:06:38 -04:00

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/* ====================================================================
* 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/bn.h>
#include <string.h>
#include <openssl/e_os2.h>
#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__) || defined(__MINGW32__)
# include <sys/types.h>
# include <unistd.h>
#else
# include <process.h>
typedef int pid_t;
#endif
#if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
# define getpid GetThreadID
extern int GetThreadID(void);
#elif defined(_WIN32) && !defined(__WATCOMC__)
# define getpid _getpid
#endif
#include <openssl/crypto.h>
#include <openssl/dso.h>
#include <openssl/engine.h>
#include <openssl/buffer.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
#ifndef OPENSSL_NO_HW
# ifndef OPENSSL_NO_HW_AEP
# ifdef FLAT_INC
# include "aep.h"
# else
# include "vendor_defns/aep.h"
# endif
# define AEP_LIB_NAME "aep engine"
# define FAIL_TO_SW 0x10101010
# include "e_aep_err.c"
static int aep_init(ENGINE *e);
static int aep_finish(ENGINE *e);
static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
static int aep_destroy(ENGINE *e);
static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR hConnection);
static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection);
static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection);
static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use);
/* BIGNUM stuff */
# ifndef OPENSSL_NO_RSA
static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
static AEP_RV aep_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *q, const BIGNUM *dmp1,
const BIGNUM *dmq1, const BIGNUM *iqmp,
BN_CTX *ctx);
# endif
/* RSA stuff */
# ifndef OPENSSL_NO_RSA
static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx);
# endif
/* This function is aliased to mod_exp (with the mont stuff dropped). */
# ifndef OPENSSL_NO_RSA
static int aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
# endif
/* DSA stuff */
# ifndef OPENSSL_NO_DSA
static int aep_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 aep_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
# endif
/* DH stuff */
/* This function is aliased to mod_exp (with the DH and mont dropped). */
# ifndef OPENSSL_NO_DH
static int aep_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
/* rand stuff */
# ifdef AEPRAND
static int aep_rand(unsigned char *buf, int num);
static int aep_rand_status(void);
# endif
/* Bignum conversion stuff */
static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32 *BigNumSize);
static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
unsigned char *AEP_BigNum);
static AEP_RV ConvertAEPBigNum(void *ArbBigNum, AEP_U32 BigNumSize,
unsigned char *AEP_BigNum);
/* The definitions for control commands specific to this engine */
# define AEP_CMD_SO_PATH ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN aep_cmd_defns[] = {
{AEP_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the 'aep' 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 aep_rsa = {
"Aep RSA method",
NULL, /* rsa_pub_encrypt */
NULL, /* rsa_pub_decrypt */
NULL, /* rsa_priv_encrypt */
NULL, /* rsa_priv_encrypt */
aep_rsa_mod_exp, /* rsa_mod_exp */
aep_mod_exp_mont, /* bn_mod_exp */
NULL, /* init */
NULL, /* finish */
0, /* flags */
NULL, /* app_data */
NULL, /* rsa_sign */
NULL, /* rsa_verify */
NULL /* rsa_keygen */
};
# endif
# ifndef OPENSSL_NO_DSA
/* Our internal DSA_METHOD that we provide pointers to */
static DSA_METHOD aep_dsa = {
"Aep DSA method",
NULL, /* dsa_do_sign */
NULL, /* dsa_sign_setup */
NULL, /* dsa_do_verify */
aep_dsa_mod_exp, /* dsa_mod_exp */
aep_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 aep_dh = {
"Aep DH method",
NULL,
NULL,
aep_mod_exp_dh,
NULL,
NULL,
0,
NULL,
NULL
};
# endif
# ifdef AEPRAND
/* our internal RAND_method that we provide pointers to */
static RAND_METHOD aep_random = {
/*
* "AEP RAND method",
*/
NULL,
aep_rand,
NULL,
NULL,
aep_rand,
aep_rand_status,
};
# endif
/*
* Define an array of structures to hold connections
*/
static AEP_CONNECTION_ENTRY aep_app_conn_table[MAX_PROCESS_CONNECTIONS];
/*
* Used to determine if this is a new process
*/
static pid_t recorded_pid = 0;
# ifdef AEPRAND
static AEP_U8 rand_block[RAND_BLK_SIZE];
static AEP_U32 rand_block_bytes = 0;
# endif
/* Constants used when creating the ENGINE */
static const char *engine_aep_id = "aep";
static const char *engine_aep_name = "Aep hardware engine support";
static int max_key_len = 2176;
/*
* This internal function is used by ENGINE_aep() and possibly by the
* "dynamic" ENGINE support too
*/
static int bind_aep(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_aep_id) ||
!ENGINE_set_name(e, engine_aep_name) ||
# ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &aep_rsa) ||
# endif
# ifndef OPENSSL_NO_DSA
!ENGINE_set_DSA(e, &aep_dsa) ||
# endif
# ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, &aep_dh) ||
# endif
# ifdef AEPRAND
!ENGINE_set_RAND(e, &aep_random) ||
# endif
!ENGINE_set_init_function(e, aep_init) ||
!ENGINE_set_destroy_function(e, aep_destroy) ||
!ENGINE_set_finish_function(e, aep_finish) ||
!ENGINE_set_ctrl_function(e, aep_ctrl) ||
!ENGINE_set_cmd_defns(e, aep_cmd_defns))
return 0;
# ifndef OPENSSL_NO_RSA
/*
* We know that the "PKCS1_SSLeay()" functions hook properly to the
* aep-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();
aep_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
aep_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
aep_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
aep_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();
aep_dsa.dsa_do_sign = meth2->dsa_do_sign;
aep_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
aep_dsa.dsa_do_verify = meth2->dsa_do_verify;
aep_dsa = *DSA_get_default_method();
aep_dsa.dsa_mod_exp = aep_dsa_mod_exp;
aep_dsa.bn_mod_exp = aep_mod_exp_dsa;
# endif
# ifndef OPENSSL_NO_DH
/* Much the same for Diffie-Hellman */
meth3 = DH_OpenSSL();
aep_dh.generate_key = meth3->generate_key;
aep_dh.compute_key = meth3->compute_key;
aep_dh.bn_mod_exp = meth3->bn_mod_exp;
# endif
/* Ensure the aep error handling is set up */
ERR_load_AEPHK_strings();
return 1;
}
# ifndef OPENSSL_NO_DYNAMIC_ENGINE
static int bind_helper(ENGINE *e, const char *id)
{
if (id && (strcmp(id, engine_aep_id) != 0))
return 0;
if (!bind_aep(e))
return 0;
return 1;
}
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
# else
static ENGINE *engine_aep(void)
{
ENGINE *ret = ENGINE_new();
if (!ret)
return NULL;
if (!bind_aep(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_aep(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_aep();
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 Aep
* 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 *aep_dso = NULL;
/*
* These are the static string constants for the DSO file name and the
* function symbol names to bind to.
*/
static const char *AEP_LIBNAME = NULL;
static const char *get_AEP_LIBNAME(void)
{
if (AEP_LIBNAME)
return AEP_LIBNAME;
return "aep";
}
static void free_AEP_LIBNAME(void)
{
OPENSSL_free(AEP_LIBNAME);
AEP_LIBNAME = NULL;
}
static long set_AEP_LIBNAME(const char *name)
{
free_AEP_LIBNAME();
return ((AEP_LIBNAME = BUF_strdup(name)) != NULL ? 1 : 0);
}
static const char *AEP_F1 = "AEP_ModExp";
static const char *AEP_F2 = "AEP_ModExpCrt";
# ifdef AEPRAND
static const char *AEP_F3 = "AEP_GenRandom";
# endif
static const char *AEP_F4 = "AEP_Finalize";
static const char *AEP_F5 = "AEP_Initialize";
static const char *AEP_F6 = "AEP_OpenConnection";
static const char *AEP_F7 = "AEP_SetBNCallBacks";
static const char *AEP_F8 = "AEP_CloseConnection";
/*
* These are the function pointers that are (un)set when the library has
* successfully (un)loaded.
*/
static t_AEP_OpenConnection *p_AEP_OpenConnection = NULL;
static t_AEP_CloseConnection *p_AEP_CloseConnection = NULL;
static t_AEP_ModExp *p_AEP_ModExp = NULL;
static t_AEP_ModExpCrt *p_AEP_ModExpCrt = NULL;
# ifdef AEPRAND
static t_AEP_GenRandom *p_AEP_GenRandom = NULL;
# endif
static t_AEP_Initialize *p_AEP_Initialize = NULL;
static t_AEP_Finalize *p_AEP_Finalize = NULL;
static t_AEP_SetBNCallBacks *p_AEP_SetBNCallBacks = NULL;
/* (de)initialisation functions. */
static int aep_init(ENGINE *e)
{
t_AEP_ModExp *p1;
t_AEP_ModExpCrt *p2;
# ifdef AEPRAND
t_AEP_GenRandom *p3;
# endif
t_AEP_Finalize *p4;
t_AEP_Initialize *p5;
t_AEP_OpenConnection *p6;
t_AEP_SetBNCallBacks *p7;
t_AEP_CloseConnection *p8;
int to_return = 0;
if (aep_dso != NULL) {
AEPHKerr(AEPHK_F_AEP_INIT, AEPHK_R_ALREADY_LOADED);
goto err;
}
/* Attempt to load libaep.so. */
aep_dso = DSO_load(NULL, get_AEP_LIBNAME(), NULL, 0);
if (aep_dso == NULL) {
AEPHKerr(AEPHK_F_AEP_INIT, AEPHK_R_NOT_LOADED);
goto err;
}
#define BINDIT(t, name) (t *)DSO_bind_func(aep_dso, name)
if ((p1 = BINDIT(t_AEP_ModExp, AEP_F1)) == NULL
|| (p2 = BINDIT(t_AEP_ModExpCrt, AEP_F2)) == NULL
# ifdef AEPRAND
|| (p3 = BINDIT(t_AEP_GenRandom, AEP_F3)) == NULL
# endif
|| (p4 = BINDIT(t_AEP_Finalize, AEP_F4)) == NULL
|| (p5 = BINDIT(t_AEP_Initialize, AEP_F5)) == NULL
|| (p6 = BINDIT(t_AEP_OpenConnection, AEP_F6)) == NULL
|| (p7 = BINDIT(t_AEP_SetBNCallBacks, AEP_F7)) == NULL
|| (p8 = BINDIT(t_AEP_CloseConnection, AEP_F8)) == NULL) {
AEPHKerr(AEPHK_F_AEP_INIT, AEPHK_R_NOT_LOADED);
goto err;
}
/* Copy the pointers */
p_AEP_ModExp = p1;
p_AEP_ModExpCrt = p2;
# ifdef AEPRAND
p_AEP_GenRandom = p3;
# endif
p_AEP_Finalize = p4;
p_AEP_Initialize = p5;
p_AEP_OpenConnection = p6;
p_AEP_SetBNCallBacks = p7;
p_AEP_CloseConnection = p8;
to_return = 1;
return to_return;
err:
DSO_free(aep_dso);
aep_dso = NULL;
p_AEP_OpenConnection = NULL;
p_AEP_ModExp = NULL;
p_AEP_ModExpCrt = NULL;
# ifdef AEPRAND
p_AEP_GenRandom = NULL;
# endif
p_AEP_Initialize = NULL;
p_AEP_Finalize = NULL;
p_AEP_SetBNCallBacks = NULL;
p_AEP_CloseConnection = NULL;
return to_return;
}
/* Destructor (complements the "ENGINE_aep()" constructor) */
static int aep_destroy(ENGINE *e)
{
free_AEP_LIBNAME();
ERR_unload_AEPHK_strings();
return 1;
}
static int aep_finish(ENGINE *e)
{
int to_return = 0, in_use;
AEP_RV rv;
if (aep_dso == NULL) {
AEPHKerr(AEPHK_F_AEP_FINISH, AEPHK_R_NOT_LOADED);
goto err;
}
rv = aep_close_all_connections(0, &in_use);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_FINISH, AEPHK_R_CLOSE_HANDLES_FAILED);
goto err;
}
if (in_use) {
AEPHKerr(AEPHK_F_AEP_FINISH, AEPHK_R_CONNECTIONS_IN_USE);
goto err;
}
rv = p_AEP_Finalize();
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_FINISH, AEPHK_R_FINALIZE_FAILED);
goto err;
}
if (!DSO_free(aep_dso)) {
AEPHKerr(AEPHK_F_AEP_FINISH, AEPHK_R_UNIT_FAILURE);
goto err;
}
aep_dso = NULL;
p_AEP_CloseConnection = NULL;
p_AEP_OpenConnection = NULL;
p_AEP_ModExp = NULL;
p_AEP_ModExpCrt = NULL;
# ifdef AEPRAND
p_AEP_GenRandom = NULL;
# endif
p_AEP_Initialize = NULL;
p_AEP_Finalize = NULL;
p_AEP_SetBNCallBacks = NULL;
to_return = 1;
err:
return to_return;
}
static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int initialised = ((aep_dso == NULL) ? 0 : 1);
switch (cmd) {
case AEP_CMD_SO_PATH:
if (p == NULL) {
AEPHKerr(AEPHK_F_AEP_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (initialised) {
AEPHKerr(AEPHK_F_AEP_CTRL, AEPHK_R_ALREADY_LOADED);
return 0;
}
return set_AEP_LIBNAME((const char *)p);
default:
break;
}
AEPHKerr(AEPHK_F_AEP_CTRL, AEPHK_R_CTRL_COMMAND_NOT_IMPLEMENTED);
return 0;
}
static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx)
{
int to_return = 0;
int r_len = 0;
AEP_CONNECTION_HNDL hConnection;
AEP_RV rv;
r_len = BN_num_bits(m);
/* Perform in software if modulus is too large for hardware. */
if (r_len > max_key_len) {
AEPHKerr(AEPHK_F_AEP_MOD_EXP, AEPHK_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
return BN_mod_exp(r, a, p, m, ctx);
}
/*
* Grab a connection from the pool
*/
rv = aep_get_connection(&hConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_MOD_EXP, AEPHK_R_GET_HANDLE_FAILED);
return BN_mod_exp(r, a, p, m, ctx);
}
/*
* To the card with the mod exp
*/
rv = p_AEP_ModExp(hConnection, (void *)a, (void *)p, (void *)m, (void *)r,
NULL);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_MOD_EXP, AEPHK_R_MOD_EXP_FAILED);
rv = aep_close_connection(hConnection);
return BN_mod_exp(r, a, p, m, ctx);
}
/*
* Return the connection to the pool
*/
rv = aep_return_connection(hConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_MOD_EXP, AEPHK_R_RETURN_CONNECTION_FAILED);
goto err;
}
to_return = 1;
err:
return to_return;
}
# ifndef OPENSSL_NO_RSA
static AEP_RV aep_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *q, const BIGNUM *dmp1,
const BIGNUM *dmq1, const BIGNUM *iqmp,
BN_CTX *ctx)
{
AEP_RV rv = AEP_R_OK;
AEP_CONNECTION_HNDL hConnection;
/*
* Grab a connection from the pool
*/
rv = aep_get_connection(&hConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT, AEPHK_R_GET_HANDLE_FAILED);
return FAIL_TO_SW;
}
/*
* To the card with the mod exp
*/
rv = p_AEP_ModExpCrt(hConnection, (void *)a, (void *)p, (void *)q,
(void *)dmp1, (void *)dmq1, (void *)iqmp, (void *)r,
NULL);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT, AEPHK_R_MOD_EXP_CRT_FAILED);
rv = aep_close_connection(hConnection);
return FAIL_TO_SW;
}
/*
* Return the connection to the pool
*/
rv = aep_return_connection(hConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT, AEPHK_R_RETURN_CONNECTION_FAILED);
goto err;
}
err:
return rv;
}
# endif
# ifdef AEPRAND
static int aep_rand(unsigned char *buf, int len)
{
AEP_RV rv = AEP_R_OK;
AEP_CONNECTION_HNDL hConnection;
CRYPTO_w_lock(CRYPTO_LOCK_RAND);
/*
* Can the request be serviced with what's already in the buffer?
*/
if (len <= rand_block_bytes) {
memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
rand_block_bytes -= len;
CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
} else
/*
* If not the get another block of random bytes
*/
{
CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
rv = aep_get_connection(&hConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_RAND, AEPHK_R_GET_HANDLE_FAILED);
goto err_nounlock;
}
if (len > RAND_BLK_SIZE) {
rv = p_AEP_GenRandom(hConnection, len, 2, buf, NULL);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_RAND, AEPHK_R_GET_RANDOM_FAILED);
goto err_nounlock;
}
} else {
CRYPTO_w_lock(CRYPTO_LOCK_RAND);
rv = p_AEP_GenRandom(hConnection, RAND_BLK_SIZE, 2,
&rand_block[0], NULL);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_RAND, AEPHK_R_GET_RANDOM_FAILED);
goto err;
}
rand_block_bytes = RAND_BLK_SIZE;
memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
rand_block_bytes -= len;
CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
}
rv = aep_return_connection(hConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_RAND, AEPHK_R_RETURN_CONNECTION_FAILED);
goto err_nounlock;
}
}
return 1;
err:
CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
err_nounlock:
return 0;
}
static int aep_rand_status(void)
{
return 1;
}
# endif
# ifndef OPENSSL_NO_RSA
static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
{
int to_return = 0;
AEP_RV rv = AEP_R_OK;
if (!aep_dso) {
AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP, AEPHK_R_NOT_LOADED);
goto err;
}
/*
* See if we have all the necessary bits for a crt
*/
if (rsa->q && rsa->dmp1 && rsa->dmq1 && rsa->iqmp) {
rv = aep_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1, rsa->dmq1,
rsa->iqmp, ctx);
if (rv == FAIL_TO_SW) {
const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
to_return = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
goto err;
} else if (rv != AEP_R_OK)
goto err;
} else {
if (!rsa->d || !rsa->n) {
AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP, AEPHK_R_MISSING_KEY_COMPONENTS);
goto err;
}
rv = aep_mod_exp(r0, I, rsa->d, rsa->n, ctx);
if (rv != AEP_R_OK)
goto err;
}
to_return = 1;
err:
return to_return;
}
# endif
# ifndef OPENSSL_NO_DSA
static int aep_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 (!aep_mod_exp(rr, a1, p1, m, ctx))
goto end;
/* let t = a2 ^ p2 mod m */
if (!aep_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 aep_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx)
{
return aep_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 aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
{
return aep_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 aep_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 aep_mod_exp(r, a, p, m, ctx);
}
# endif
static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR phConnection)
{
int count;
AEP_RV rv = AEP_R_OK;
/*
* Get the current process id
*/
pid_t curr_pid;
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
curr_pid = getpid();
/*
* Check if this is the first time this is being called from the current
* process
*/
if (recorded_pid != curr_pid) {
/*
* Remember our pid so we can check if we're in a new process
*/
recorded_pid = curr_pid;
/*
* Call Finalize to make sure we have not inherited some data from a
* parent process
*/
p_AEP_Finalize();
/*
* Initialise the AEP API
*/
rv = p_AEP_Initialize(NULL);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_GET_CONNECTION, AEPHK_R_INIT_FAILURE);
recorded_pid = 0;
goto end;
}
/*
* Set the AEP big num call back functions
*/
rv = p_AEP_SetBNCallBacks(&GetBigNumSize, &MakeAEPBigNum,
&ConvertAEPBigNum);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,
AEPHK_R_SETBNCALLBACK_FAILURE);
recorded_pid = 0;
goto end;
}
# ifdef AEPRAND
/*
* Reset the rand byte count
*/
rand_block_bytes = 0;
# endif
/*
* Init the structures
*/
for (count = 0; count < MAX_PROCESS_CONNECTIONS; count++) {
aep_app_conn_table[count].conn_state = NotConnected;
aep_app_conn_table[count].conn_hndl = 0;
}
/*
* Open a connection
*/
rv = p_AEP_OpenConnection(phConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_GET_CONNECTION, AEPHK_R_UNIT_FAILURE);
recorded_pid = 0;
goto end;
}
aep_app_conn_table[0].conn_state = InUse;
aep_app_conn_table[0].conn_hndl = *phConnection;
goto end;
}
/*
* Check the existing connections to see if we can find a free one
*/
for (count = 0; count < MAX_PROCESS_CONNECTIONS; count++) {
if (aep_app_conn_table[count].conn_state == Connected) {
aep_app_conn_table[count].conn_state = InUse;
*phConnection = aep_app_conn_table[count].conn_hndl;
goto end;
}
}
/*
* If no connections available, we're going to have to try to open a new
* one
*/
for (count = 0; count < MAX_PROCESS_CONNECTIONS; count++) {
if (aep_app_conn_table[count].conn_state == NotConnected) {
/*
* Open a connection
*/
rv = p_AEP_OpenConnection(phConnection);
if (rv != AEP_R_OK) {
AEPHKerr(AEPHK_F_AEP_GET_CONNECTION, AEPHK_R_UNIT_FAILURE);
goto end;
}
aep_app_conn_table[count].conn_state = InUse;
aep_app_conn_table[count].conn_hndl = *phConnection;
goto end;
}
}
rv = AEP_R_GENERAL_ERROR;
end:
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
return rv;
}
static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection)
{
int count;
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
/*
* Find the connection item that matches this connection handle
*/
for (count = 0; count < MAX_PROCESS_CONNECTIONS; count++) {
if (aep_app_conn_table[count].conn_hndl == hConnection) {
aep_app_conn_table[count].conn_state = Connected;
break;
}
}
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
return AEP_R_OK;
}
static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection)
{
int count;
AEP_RV rv = AEP_R_OK;
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
/*
* Find the connection item that matches this connection handle
*/
for (count = 0; count < MAX_PROCESS_CONNECTIONS; count++) {
if (aep_app_conn_table[count].conn_hndl == hConnection) {
rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
if (rv != AEP_R_OK)
goto end;
aep_app_conn_table[count].conn_state = NotConnected;
aep_app_conn_table[count].conn_hndl = 0;
break;
}
}
end:
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
return rv;
}
static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use)
{
int count;
AEP_RV rv = AEP_R_OK;
*in_use = 0;
if (use_engine_lock)
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
for (count = 0; count < MAX_PROCESS_CONNECTIONS; count++) {
switch (aep_app_conn_table[count].conn_state) {
case Connected:
rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
if (rv != AEP_R_OK)
goto end;
aep_app_conn_table[count].conn_state = NotConnected;
aep_app_conn_table[count].conn_hndl = 0;
break;
case InUse:
(*in_use)++;
break;
case NotConnected:
break;
}
}
end:
if (use_engine_lock)
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
return rv;
}
/*
* BigNum call back functions, used to convert OpenSSL bignums into AEP
* bignums. Note only 32bit Openssl build support
*/
static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32 *BigNumSize)
{
BIGNUM *bn;
/*
* Cast the ArbBigNum pointer to our BIGNUM struct
*/
bn = (BIGNUM *)ArbBigNum;
*BigNumSize = bn->top * BN_BYTES;
if (BN_BYTES > sizeof(AEP_U32) && (bn->d[bn->top - 1] >> BN_BITS4) == 0)
*BigNumSize -= 4;
return AEP_R_OK;
}
static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
unsigned char *AEP_BigNum)
{
BIGNUM *bn;
const union {
long one;
char little;
} is_endian = {
1
};
AEP_U32 i, j;
/*
* Cast the ArbBigNum pointer to our BIGNUM struct
*/
bn = (BIGNUM *)ArbBigNum;
/*
* Must copy data into a (monotone) least significant byte first format
* performing endian conversion if necessary
*/
if (is_endian.little && sizeof(bn->d[0]) == BN_BYTES)
memcpy(AEP_BigNum, bn->d, BigNumSize);
else {
BN_ULONG di;
for (i = 0; BigNumSize >= BN_BYTES; i++) {
di = bn->d[i];
for (j = 0; j < BN_BYTES; j++) {
AEP_BigNum[j] = (unsigned char)di;
di >>= 8;
}
AEP_BigNum += BN_BYTES;
BigNumSize -= BN_BYTES;
}
if (BigNumSize) {
di = bn->d[i];
for (j = 0; j < BigNumSize; j++) {
AEP_BigNum[j] = (unsigned char)di;
di >>= 8;
}
}
}
return AEP_R_OK;
}
/*
* Turn an AEP Big Num back to a user big num
*/
static AEP_RV ConvertAEPBigNum(void *ArbBigNum, AEP_U32 BigNumSize,
unsigned char *AEP_BigNum)
{
BIGNUM *bn;
const union {
long one;
char little;
} is_endian = {
1
};
int i, j, top;
bn = (BIGNUM *)ArbBigNum;
/*
* Expand the result bn so that it can hold our big num. Size is in bits
*/
top = (BigNumSize + BN_BYTES - 1) / BN_BYTES;
bn_expand(bn, top);
bn->top = top;
bn->d[top - 1] = 0;
if (is_endian.little && sizeof(bn->d[0]) == BN_BYTES)
memcpy(bn->d, AEP_BigNum, BigNumSize);
else {
BN_ULONG di;
for (i = 0; BigNumSize >= BN_BYTES; i++) {
for (di = 0, j = BN_BYTES; j != 0;) {
di <<= 8;
di |= AEP_BigNum[--j];
}
bn->d[i] = di;
AEP_BigNum += BN_BYTES;
BigNumSize -= BN_BYTES;
}
if (BigNumSize) {
for (di = 0, j = BigNumSize; j != 0;) {
di <<= 8;
di |= AEP_BigNum[--j];
}
bn->d[i] = di;
}
}
return AEP_R_OK;
}
# endif /* !OPENSSL_NO_HW_AEP */
#endif /* !OPENSSL_NO_HW */
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