Merge in demo engines from 0.9.7-stable.

6 files changed, 2264 insertions, 0 deletions

diff --git a/demos/engines/zencod/Makefile b/demos/engines/zencod/Makefile
new file mode 100644
index 0000000000..5b6a339ab2
--- /dev/null
+++ b/demos/engines/zencod/Makefile
@@ -0,0 +1,114 @@
+LIBNAME=	libzencod
+SRC=		hw_zencod.c
+OBJ=		hw_zencod.o
+HEADER=		hw_zencod.h
+
+CC=		gcc
+PIC=		-fPIC
+CFLAGS=		-g -I../../../include $(PIC) -DENGINE_DYNAMIC_SUPPORT -DFLAT_INC
+AR=		ar r
+RANLIB=		ranlib
+
+LIB=		$(LIBNAME).a
+SHLIB=		$(LIBNAME).so
+
+all:
+		@echo 'Please choose a system to build on:'
+		@echo ''
+		@echo 'tru64:    Tru64 Unix, Digital Unix, Digital OSF/1'
+		@echo 'solaris:  Solaris'
+		@echo 'irix:     IRIX'
+		@echo 'hpux32:   32-bit HP/UX'
+		@echo 'hpux64:   64-bit HP/UX'
+		@echo 'aix:      AIX'
+		@echo 'gnu:      Generic GNU-based system (gcc and GNU ld)'
+		@echo ''
+
+FORCE.update:
+update:		FORCE.update
+		perl ../../../util/mkerr.pl -conf hw_zencod.ec \
+			-nostatic -staticloader -write hw_zencod.c
+
+gnu:		$(SHLIB).gnu
+tru64:		$(SHLIB).tru64
+solaris:	$(SHLIB).solaris
+irix:		$(SHLIB).irix
+hpux32:		$(SHLIB).hpux32
+hpux64:		$(SHLIB).hpux64
+aix:		$(SHLIB).aix
+
+$(LIB):		$(OBJ)
+		$(AR) $(LIB) $(OBJ)
+		- $(RANLIB) $(LIB)
+
+LINK_SO=	\
+  ld -r -o $(LIBNAME).o $$ALLSYMSFLAGS $(LIB) && \
+  (nm -Pg $(LIBNAME).o | grep ' [BDT] ' | cut -f1 -d' ' > $(LIBNAME).exp; \
+   $$SHAREDCMD $$SHAREDFLAGS -o $(SHLIB) $(LIBNAME).o -L ../../.. -lcrypto -lc)
+
+$(SHLIB).gnu:	$(LIB)
+		ALLSYMSFLAGS='--whole-archive' \
+		SHAREDFLAGS='-shared -Wl,-soname=$(SHLIB)' \
+		SHAREDCMD='$(CC)'; \
+		$(LINK_SO)
+		touch $(SHLIB).gnu
+$(SHLIB).tru64:	$(LIB)
+		ALLSYMSFLAGS='-all' \
+		SHAREDFLAGS='-shared' \
+		SHAREDCMD='$(CC)'; \
+		$(LINK_SO)
+		touch $(SHLIB).tru64
+$(SHLIB).solaris:	$(LIB)
+		ALLSYMSFLAGS='-z allextract' \
+		SHAREDFLAGS='-G -h $(SHLIB)' \
+		SHAREDCMD='$(CC)'; \
+		$(LINK_SO)
+		touch $(SHLIB).solaris
+$(SHLIB).irix:	$(LIB)
+		ALLSYMSFLAGS='-all' \
+		SHAREDFLAGS='-shared -Wl,-soname,$(SHLIB)' \
+		SHAREDCMD='$(CC)'; \
+		$(LINK_SO)
+		touch $(SHLIB).irix
+$(SHLIB).hpux32:	$(LIB)
+		ALLSYMSFLAGS='-Fl' \
+		SHAREDFLAGS='+vnocompatwarnings -b -z +s +h $(SHLIB)' \
+		SHAREDCMD='/usr/ccs/bin/ld'; \
+		$(LINK_SO)
+		touch $(SHLIB).hpux32
+$(SHLIB).hpux64:	$(LIB)
+		ALLSYMSFLAGS='+forceload' \
+		SHAREDFLAGS='-b -z +h $(SHLIB)' \
+		SHAREDCMD='/usr/ccs/bin/ld'; \
+		$(LINK_SO)
+		touch $(SHLIB).hpux64
+$(SHLIB).aix:	$(LIB)
+		ALLSYMSFLAGS='-bnogc' \
+		SHAREDFLAGS='-G -bE:$(LIBNAME).exp -bM:SRE' \
+		SHAREDCMD='$(CC)'; \
+		$(LINK_SO)
+		touch $(SHLIB).aix
+
+depend:
+		sed -e '/^# DO NOT DELETE.*/,$$d' < Makefile > Makefile.tmp
+		echo '# DO NOT DELETE THIS LINE -- make depend depends on it.' >> Makefile.tmp
+		gcc -M $(CFLAGS) $(SRC) >> Makefile.tmp
+		perl ../../../util/clean-depend.pl < Makefile.tmp > Makefile.new
+		rm -f Makefile.tmp Makefile
+		mv Makefile.new Makefile
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+rsaref.o: ../../../include/openssl/asn1.h ../../../include/openssl/bio.h
+rsaref.o: ../../../include/openssl/bn.h ../../../include/openssl/crypto.h
+rsaref.o: ../../../include/openssl/dh.h ../../../include/openssl/dsa.h
+rsaref.o: ../../../include/openssl/e_os2.h ../../../include/openssl/engine.h
+rsaref.o: ../../../include/openssl/err.h ../../../include/openssl/lhash.h
+rsaref.o: ../../../include/openssl/opensslconf.h
+rsaref.o: ../../../include/openssl/opensslv.h
+rsaref.o: ../../../include/openssl/ossl_typ.h ../../../include/openssl/rand.h
+rsaref.o: ../../../include/openssl/rsa.h ../../../include/openssl/safestack.h
+rsaref.o: ../../../include/openssl/stack.h ../../../include/openssl/symhacks.h
+rsaref.o: ../../../include/openssl/ui.h rsaref.c rsaref_err.c rsaref_err.h
+rsaref.o: source/des.h source/global.h source/md2.h source/md5.h source/rsa.h
+rsaref.o: source/rsaref.h
diff --git a/demos/engines/zencod/hw_zencod.c b/demos/engines/zencod/hw_zencod.c
new file mode 100644
index 0000000000..308e18710f
--- /dev/null
+++ b/demos/engines/zencod/hw_zencod.c
@@ -0,0 +1,1736 @@
+/* crypto/engine/hw_zencod.c */
+ /* Written by Fred Donnat (frederic.donnat@zencod.com) for "zencod"
+ * engine integration in order to redirect crypto computing on a crypto
+ * hardware accelerator zenssl32  ;-)
+ *
+ * Date : 25 jun 2002
+ * Revision : 17 Ju7 2002
+ * Version : zencod_engine-0.9.7
+ */
+
+/* ====================================================================
+ * 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).
+ *
+ */
+
+
+/* ENGINE general include */
+#include <stdio.h>
+#include <openssl/crypto.h>
+#include <openssl/dso.h>
+#include <openssl/engine.h>
+
+#ifndef OPENSSL_NO_HW
+#ifndef OPENSSL_NO_HW_ZENCOD
+
+#ifdef FLAT_INC
+#  include "hw_zencod.h"
+#else
+#  include "vendor_defns/hw_zencod.h"
+#endif
+
+#define ZENCOD_LIB_NAME "zencod engine"
+#include "hw_zencod_err.c"
+
+#define FAIL_TO_SOFTWARE		-15
+
+#define	ZEN_LIBRARY	"zenbridge"
+
+#if 0
+#  define PERROR(s)	perror(s)
+#  define CHEESE()	fputs("## [ZenEngine] ## " __FUNCTION__ "\n", stderr)
+#else
+#  define PERROR(s)
+#  define CHEESE()
+#endif
+
+
+/* Sorry ;) */
+#ifndef WIN32
+static inline void esrever ( unsigned char *d, int l )
+{
+	for(;--l>0;--l,d++){*d^=*(d+l);*(d+l)^=*d;*d^=*(d+l);}
+}
+
+static inline void ypcmem ( unsigned char *d, const unsigned char *s, int l )
+{
+	for(d+=l;l--;)*--d=*s++;
+}
+#else
+static __inline void esrever ( unsigned char *d, int l )
+{
+	for(;--l>0;--l,d++){*d^=*(d+l);*(d+l)^=*d;*d^=*(d+l);}
+}
+
+static __inline void ypcmem ( unsigned char *d, const unsigned char *s, int l )
+{
+	for(d+=l;l--;)*--d=*s++;
+}
+#endif
+
+
+#define BIGNUM2ZEN(n, bn)	(ptr_zencod_init_number((n), \
+					(unsigned long) ((bn)->top * BN_BITS2), \
+					(unsigned char *) ((bn)->d)))
+
+#define ZEN_BITS(n, bytes)	(ptr_zencod_bytes2bits((unsigned char *) (n), (unsigned long) (bytes)))
+#define ZEN_BYTES(bits)	(ptr_zencod_bits2bytes((unsigned long) (bits)))
+
+
+/* Function for ENGINE detection and control */
+static int zencod_destroy ( ENGINE *e ) ;
+static int zencod_init ( ENGINE *e ) ;
+static int zencod_finish ( ENGINE *e ) ;
+static int zencod_ctrl ( ENGINE *e, int cmd, long i, void *p, void (*f) () ) ;
+
+/* BIGNUM stuff */
+static int zencod_bn_mod_exp ( BIGNUM *r, const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx ) ;
+
+/* RSA stuff */
+#ifndef OPENSSL_NO_RSA
+static int RSA_zencod_rsa_mod_exp ( BIGNUM *r0, const BIGNUM *I, RSA *rsa ) ;
+static int RSA_zencod_bn_mod_exp ( 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 DSA_zencod_bn_mod_exp ( DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
+		BN_MONT_CTX *m_ctx ) ;
+
+static DSA_SIG *DSA_zencod_do_sign ( const unsigned char *dgst, int dlen, DSA *dsa ) ;
+static int DSA_zencod_do_verify ( const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
+		DSA *dsa ) ;
+#endif
+
+/* DH stuff */
+#ifndef OPENSSL_NO_DH
+static int DH_zencod_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 ) ;
+static int DH_zencod_generate_key ( DH *dh ) ;
+static int DH_zencod_compute_key ( unsigned char *key, const BIGNUM *pub_key, DH *dh ) ;
+#endif
+
+/* Rand stuff */
+static void RAND_zencod_seed ( const void *buf, int num ) ;
+static int RAND_zencod_rand_bytes ( unsigned char *buf, int num ) ;
+static int RAND_zencod_rand_status ( void ) ;
+
+/* Digest Stuff */
+static int engine_digests ( ENGINE *e, const EVP_MD **digest, const int **nids, int nid ) ;
+
+/* Cipher Stuff */
+static int engine_ciphers ( ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid ) ;
+
+
+#define ZENCOD_CMD_SO_PATH			ENGINE_CMD_BASE
+static const ENGINE_CMD_DEFN zencod_cmd_defns [ ] =
+{
+	{ ZENCOD_CMD_SO_PATH,
+	  "SO_PATH",
+	  "Specifies the path to the 'zenbridge' shared library",
+	  ENGINE_CMD_FLAG_STRING},
+	{ 0, NULL, NULL, 0 }
+} ;
+
+
+#ifndef OPENSSL_NO_RSA
+/* Our internal RSA_METHOD specific to zencod ENGINE providing pointers to our function */
+static RSA_METHOD zencod_rsa =
+{
+	"ZENCOD RSA method",
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	RSA_zencod_rsa_mod_exp,
+	RSA_zencod_bn_mod_exp,
+	NULL,
+	NULL,
+	0,
+	NULL,
+	NULL,
+	NULL
+} ;
+#endif
+
+#ifndef OPENSSL_NO_DSA
+/* Our internal DSA_METHOD specific to zencod ENGINE providing pointers to our function */
+static DSA_METHOD zencod_dsa =
+{
+	"ZENCOD DSA method",
+	DSA_zencod_do_sign,
+	NULL,
+	DSA_zencod_do_verify,
+	NULL,
+	DSA_zencod_bn_mod_exp,
+	NULL,
+	NULL,
+	0,
+	NULL
+} ;
+#endif
+
+#ifndef OPENSSL_NO_DH
+/* Our internal DH_METHOD specific to zencod ENGINE providing pointers to our function */
+static DH_METHOD zencod_dh =
+{
+	"ZENCOD DH method",
+	DH_zencod_generate_key,
+	DH_zencod_compute_key,
+	DH_zencod_bn_mod_exp,
+	NULL,
+	NULL,
+	0,
+	NULL
+} ;
+#endif
+
+/* Our internal RAND_meth specific to zencod ZNGINE providing pointers to  our function */
+static RAND_METHOD zencod_rand =
+{
+	RAND_zencod_seed,
+	RAND_zencod_rand_bytes,
+	NULL,
+	NULL,
+	RAND_zencod_rand_bytes,
+	RAND_zencod_rand_status
+} ;
+
+
+/* Constants used when creating the ENGINE */
+static const char *engine_zencod_id = "zencod";
+static const char *engine_zencod_name = "ZENCOD hardware engine support";
+
+
+/* This internal function is used by ENGINE_zencod () and possibly by the
+ * "dynamic" ENGINE support too   ;-)
+ */
+static int bind_helper ( ENGINE *e )
+{
+
+#ifndef OPENSSL_NO_RSA
+	const RSA_METHOD *meth_rsa ;
+#endif
+#ifndef OPENSSL_NO_DSA
+	const DSA_METHOD *meth_dsa ;
+#endif
+#ifndef OPENSSL_NO_DH
+	const DH_METHOD *meth_dh ;
+#endif
+
+	const RAND_METHOD *meth_rand ;
+
+
+	if ( !ENGINE_set_id ( e, engine_zencod_id ) ||
+			!ENGINE_set_name ( e, engine_zencod_name ) ||
+#ifndef OPENSSL_NO_RSA
+			!ENGINE_set_RSA ( e, &zencod_rsa ) ||
+#endif
+#ifndef OPENSSL_NO_DSA
+			!ENGINE_set_DSA ( e, &zencod_dsa ) ||
+#endif
+#ifndef OPENSSL_NO_DH
+			!ENGINE_set_DH ( e, &zencod_dh ) ||
+#endif
+			!ENGINE_set_RAND ( e, &zencod_rand ) ||
+
+			!ENGINE_set_destroy_function ( e, zencod_destroy ) ||
+			!ENGINE_set_init_function ( e, zencod_init ) ||
+			!ENGINE_set_finish_function ( e, zencod_finish ) ||
+			!ENGINE_set_ctrl_function ( e, zencod_ctrl ) ||
+			!ENGINE_set_cmd_defns ( e, zencod_cmd_defns ) ||
+			!ENGINE_set_digests ( e, engine_digests ) ||
+			!ENGINE_set_ciphers ( e, engine_ciphers ) ) {
+		return 0 ;
+	}
+
+#ifndef OPENSSL_NO_RSA
+	/* We know that the "PKCS1_SSLeay()" functions hook properly
+	 * to the Zencod-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!
+	 */
+	meth_rsa = RSA_PKCS1_SSLeay () ;
+
+	zencod_rsa.rsa_pub_enc = meth_rsa->rsa_pub_enc ;
+	zencod_rsa.rsa_pub_dec = meth_rsa->rsa_pub_dec ;
+	zencod_rsa.rsa_priv_enc = meth_rsa->rsa_priv_enc ;
+	zencod_rsa.rsa_priv_dec = meth_rsa->rsa_priv_dec ;
+	/* meth_rsa->rsa_mod_exp */
+	/* meth_rsa->bn_mod_exp */
+	zencod_rsa.init = meth_rsa->init ;
+	zencod_rsa.finish = meth_rsa->finish ;
+#endif
+
+#ifndef OPENSSL_NO_DSA
+	/* We use OpenSSL meth to supply what we don't provide ;-*)
+	 */
+	meth_dsa = DSA_OpenSSL () ;
+
+	/* meth_dsa->dsa_do_sign */
+	zencod_dsa.dsa_sign_setup = meth_dsa->dsa_sign_setup ;
+	/* meth_dsa->dsa_do_verify */
+	zencod_dsa.dsa_mod_exp = meth_dsa->dsa_mod_exp ;
+	/* zencod_dsa.bn_mod_exp = meth_dsa->bn_mod_exp ; */
+	zencod_dsa.init = meth_dsa->init ;
+	zencod_dsa.finish = meth_dsa->finish ;
+#endif
+
+#ifndef OPENSSL_NO_DH
+	/* We use OpenSSL meth to supply what we don't provide ;-*)
+	 */
+	meth_dh = DH_OpenSSL () ;
+
+	/* zencod_dh.generate_key = meth_dh->generate_key ; */
+	/* zencod_dh.compute_key = meth_dh->compute_key ; */
+	/* zencod_dh.bn_mod_exp = meth_dh->bn_mod_exp ; */
+	zencod_dh.init = meth_dh->init ;
+	zencod_dh.finish = meth_dh->finish ;
+
+#endif
+
+	/* We use OpenSSL (SSLeay) meth to supply what we don't provide ;-*)
+	 */
+	meth_rand = RAND_SSLeay () ;
+
+	/* meth_rand->seed ; */
+	/* zencod_rand.seed = meth_rand->seed ; */
+	/* meth_rand->bytes ; */
+	/* zencod_rand.bytes = meth_rand->bytes ; */
+	zencod_rand.cleanup = meth_rand->cleanup ;
+	zencod_rand.add = meth_rand->add ;
+	/* meth_rand->pseudorand ; */
+	/* zencod_rand.pseudorand = meth_rand->pseudorand ; */
+	/* zencod_rand.status = meth_rand->status ; */
+	/* meth_rand->status ; */
+
+	/* Ensure the zencod error handling is set up */
+	ERR_load_ZENCOD_strings () ;
+	return 1 ;
+}
+
+
+/* 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_zencod ( void )
+{
+
+	ENGINE *eng = ENGINE_new () ;
+
+	if ( !eng ) {
+		return NULL ;
+	}
+	if ( !bind_helper ( eng ) ) {
+		ENGINE_free ( eng ) ;
+		return NULL ;
+	}
+
+	return eng ;
+}
+
+
+void ENGINE_load_zencod ( void )
+{
+	/* Copied from eng_[openssl|dyn].c */
+	ENGINE *toadd = ENGINE_zencod ( ) ;
+	if ( !toadd ) return ;
+	ENGINE_add ( toadd ) ;
+	ENGINE_free ( toadd ) ;
+	ERR_clear_error ( ) ;
+}
+
+
+/* This is a process-global DSO handle used for loading and unloading
+ * the ZENBRIDGE 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 *zencod_dso = NULL ;
+
+static t_zencod_test *ptr_zencod_test = NULL ;
+static t_zencod_bytes2bits *ptr_zencod_bytes2bits = NULL ;
+static t_zencod_bits2bytes *ptr_zencod_bits2bytes = NULL ;
+static t_zencod_new_number *ptr_zencod_new_number = NULL ;
+static t_zencod_init_number *ptr_zencod_init_number = NULL ;
+
+static t_zencod_rsa_mod_exp *ptr_zencod_rsa_mod_exp = NULL ;
+static t_zencod_rsa_mod_exp_crt *ptr_zencod_rsa_mod_exp_crt = NULL ;
+static t_zencod_dsa_do_sign *ptr_zencod_dsa_do_sign = NULL ;
+static t_zencod_dsa_do_verify *ptr_zencod_dsa_do_verify = NULL ;
+static t_zencod_dh_generate_key *ptr_zencod_dh_generate_key = NULL ;
+static t_zencod_dh_compute_key *ptr_zencod_dh_compute_key = NULL ;
+static t_zencod_rand_bytes *ptr_zencod_rand_bytes = NULL ;
+static t_zencod_math_mod_exp *ptr_zencod_math_mod_exp = NULL ;
+
+static t_zencod_md5_init *ptr_zencod_md5_init = NULL ;
+static t_zencod_md5_update *ptr_zencod_md5_update = NULL ;
+static t_zencod_md5_do_final *ptr_zencod_md5_do_final = NULL ;
+static t_zencod_sha1_init *ptr_zencod_sha1_init = NULL ;
+static t_zencod_sha1_update *ptr_zencod_sha1_update = NULL ;
+static t_zencod_sha1_do_final *ptr_zencod_sha1_do_final = NULL ;
+
+static t_zencod_xdes_cipher *ptr_zencod_xdes_cipher = NULL ;
+static t_zencod_rc4_cipher *ptr_zencod_rc4_cipher = NULL ;
+
+/* These are the static string constants for the DSO file name and the function
+ * symbol names to bind to.
+ */
+static const char *ZENCOD_LIBNAME = ZEN_LIBRARY ;
+
+static const char *ZENCOD_Fct_0 = "test_device" ;
+static const char *ZENCOD_Fct_1 = "zenbridge_bytes2bits" ;
+static const char *ZENCOD_Fct_2 = "zenbridge_bits2bytes" ;
+static const char *ZENCOD_Fct_3 = "zenbridge_new_number" ;
+static const char *ZENCOD_Fct_4 = "zenbridge_init_number" ;
+
+static const char *ZENCOD_Fct_exp_1 = "zenbridge_rsa_mod_exp" ;
+static const char *ZENCOD_Fct_exp_2 = "zenbridge_rsa_mod_exp_crt" ;
+static const char *ZENCOD_Fct_dsa_1 = "zenbridge_dsa_do_sign" ;
+static const char *ZENCOD_Fct_dsa_2 = "zenbridge_dsa_do_verify" ;
+static const char *ZENCOD_Fct_dh_1 = "zenbridge_dh_generate_key" ;
+static const char *ZENCOD_Fct_dh_2 = "zenbridge_dh_compute_key" ;
+static const char *ZENCOD_Fct_rand_1 = "zenbridge_rand_bytes" ;
+static const char *ZENCOD_Fct_math_1 = "zenbridge_math_mod_exp" ;
+
+static const char *ZENCOD_Fct_md5_1 = "zenbridge_md5_init" ;
+static const char *ZENCOD_Fct_md5_2 = "zenbridge_md5_update" ;
+static const char *ZENCOD_Fct_md5_3 = "zenbridge_md5_do_final" ;
+static const char *ZENCOD_Fct_sha1_1 = "zenbridge_sha1_init" ;
+static const char *ZENCOD_Fct_sha1_2 = "zenbridge_sha1_update" ;
+static const char *ZENCOD_Fct_sha1_3 = "zenbridge_sha1_do_final" ;
+
+static const char *ZENCOD_Fct_xdes_1 = "zenbridge_xdes_cipher" ;
+static const char *ZENCOD_Fct_rc4_1 = "zenbridge_rc4_cipher" ;
+
+/* Destructor (complements the "ENGINE_zencod ()" constructor)
+ */
+static int zencod_destroy (ENGINE *e )
+{
+
+	ERR_unload_ZENCOD_strings () ;
+
+	return 1 ;
+}
+
+
+/* (de)initialisation functions. Control Function
+ */
+static int zencod_init ( ENGINE *e )
+{
+
+	t_zencod_test *ptr_0 ;
+	t_zencod_bytes2bits *ptr_1 ;
+	t_zencod_bits2bytes *ptr_2 ;
+	t_zencod_new_number *ptr_3 ;
+	t_zencod_init_number *ptr_4 ;
+	t_zencod_rsa_mod_exp *ptr_exp_1 ;
+	t_zencod_rsa_mod_exp_crt *ptr_exp_2 ;
+	t_zencod_dsa_do_sign *ptr_dsa_1 ;
+	t_zencod_dsa_do_verify *ptr_dsa_2 ;
+	t_zencod_dh_generate_key *ptr_dh_1 ;
+	t_zencod_dh_compute_key *ptr_dh_2 ;
+	t_zencod_rand_bytes *ptr_rand_1 ;
+	t_zencod_math_mod_exp *ptr_math_1 ;
+	t_zencod_md5_init *ptr_md5_1 ;
+	t_zencod_md5_update *ptr_md5_2 ;
+	t_zencod_md5_do_final *ptr_md5_3 ;
+	t_zencod_sha1_init *ptr_sha1_1 ;
+	t_zencod_sha1_update *ptr_sha1_2 ;
+	t_zencod_sha1_do_final *ptr_sha1_3 ;
+	t_zencod_xdes_cipher *ptr_xdes_1 ;
+	t_zencod_rc4_cipher *ptr_rc4_1 ;
+
+	CHEESE () ;
+
+	/*
+	 * We Should add some tests for non NULL parameters or bad value !!
+	 * Stuff to be done ...
+	 */
+
+	if ( zencod_dso != NULL ) {
+		ZENCODerr ( ZENCOD_F_ZENCOD_INIT, ZENCOD_R_ALREADY_LOADED ) ;
+		goto err ;
+	}
+	/* Trying to load the Library "cryptozen"
+	 */
+	zencod_dso = DSO_load ( NULL, ZENCOD_LIBNAME, NULL, 0 ) ;
+	if ( zencod_dso == NULL ) {
+		ZENCODerr ( ZENCOD_F_ZENCOD_INIT, ZENCOD_R_DSO_FAILURE ) ;
+		goto err ;
+	}
+
+	/* Trying to load Function from the Library
+	 */
+	if ( ! ( ptr_1 = (t_zencod_bytes2bits*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_1 ) ) ||
+			! ( ptr_2 = (t_zencod_bits2bytes*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_2 ) ) ||
+			! ( ptr_3 = (t_zencod_new_number*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_3 ) ) ||
+			! ( ptr_4 = (t_zencod_init_number*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_4 ) ) ||
+			! ( ptr_exp_1 = (t_zencod_rsa_mod_exp*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_exp_1 ) ) ||
+			! ( ptr_exp_2 = (t_zencod_rsa_mod_exp_crt*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_exp_2 ) ) ||
+			! ( ptr_dsa_1 = (t_zencod_dsa_do_sign*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_dsa_1 ) ) ||
+			! ( ptr_dsa_2 = (t_zencod_dsa_do_verify*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_dsa_2 ) ) ||
+			! ( ptr_dh_1 = (t_zencod_dh_generate_key*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_dh_1 ) ) ||
+			! ( ptr_dh_2 = (t_zencod_dh_compute_key*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_dh_2 ) ) ||
+			! ( ptr_rand_1 = (t_zencod_rand_bytes*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_rand_1 ) ) ||
+			! ( ptr_math_1 = (t_zencod_math_mod_exp*) DSO_bind_func ( zencod_dso, ZENCOD_Fct_math_1 ) ) ||
+			! ( ptr_0 = (t_zencod_test *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_0 ) ) ||
+			! ( ptr_md5_1 = (t_zencod_md5_init *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_md5_1 ) ) ||
+			! ( ptr_md5_2 = (t_zencod_md5_update *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_md5_2 ) ) ||
+			! ( ptr_md5_3 = (t_zencod_md5_do_final *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_md5_3 ) ) ||
+			! ( ptr_sha1_1 = (t_zencod_sha1_init *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_sha1_1 ) ) ||
+			! ( ptr_sha1_2 = (t_zencod_sha1_update *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_sha1_2 ) ) ||
+			! ( ptr_sha1_3 = (t_zencod_sha1_do_final *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_sha1_3 ) ) ||
+			! ( ptr_xdes_1 = (t_zencod_xdes_cipher *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_xdes_1 ) ) ||
+			! ( ptr_rc4_1 = (t_zencod_rc4_cipher *) DSO_bind_func ( zencod_dso, ZENCOD_Fct_rc4_1 ) ) ) {
+
+		ZENCODerr ( ZENCOD_F_ZENCOD_INIT, ZENCOD_R_DSO_FAILURE ) ;
+		goto err ;
+	}
+
+	/* The function from "cryptozen" Library have been correctly loaded so copy them
+	 */
+	ptr_zencod_test = ptr_0 ;
+	ptr_zencod_bytes2bits = ptr_1 ;
+	ptr_zencod_bits2bytes = ptr_2 ;
+	ptr_zencod_new_number = ptr_3 ;
+	ptr_zencod_init_number = ptr_4 ;
+	ptr_zencod_rsa_mod_exp = ptr_exp_1 ;
+	ptr_zencod_rsa_mod_exp_crt = ptr_exp_2 ;
+	ptr_zencod_dsa_do_sign = ptr_dsa_1 ;
+	ptr_zencod_dsa_do_verify = ptr_dsa_2 ;
+	ptr_zencod_dh_generate_key = ptr_dh_1 ;
+	ptr_zencod_dh_compute_key = ptr_dh_2 ;
+	ptr_zencod_rand_bytes = ptr_rand_1 ;
+	ptr_zencod_math_mod_exp = ptr_math_1 ;
+	ptr_zencod_test = ptr_0 ;
+	ptr_zencod_md5_init = ptr_md5_1 ;
+	ptr_zencod_md5_update = ptr_md5_2 ;
+	ptr_zencod_md5_do_final = ptr_md5_3 ;
+	ptr_zencod_sha1_init = ptr_sha1_1 ;
+	ptr_zencod_sha1_update = ptr_sha1_2 ;
+	ptr_zencod_sha1_do_final = ptr_sha1_3 ;
+	ptr_zencod_xdes_cipher = ptr_xdes_1 ;
+	ptr_zencod_rc4_cipher = ptr_rc4_1 ;
+
+	/* We should peform a test to see if there is actually any unit runnig on the system ...
+	 * Even if the cryptozen library is loaded the module coul not be loaded on the system ...
+	 * For now we may just open and close the device !!
+	 */
+
+	if ( ptr_zencod_test () != 0 ) {
+		ZENCODerr ( ZENCOD_F_ZENCOD_INIT, ZENCOD_R_UNIT_FAILURE ) ;
+		goto err ;
+	}
+
+	return 1 ;
+err :
+	if ( zencod_dso ) {
+		DSO_free ( zencod_dso ) ;
+	}
+	zencod_dso = NULL ;
+	ptr_zencod_bytes2bits = NULL ;
+	ptr_zencod_bits2bytes = NULL ;
+	ptr_zencod_new_number = NULL ;
+	ptr_zencod_init_number = NULL ;
+	ptr_zencod_rsa_mod_exp = NULL ;
+	ptr_zencod_rsa_mod_exp_crt = NULL ;
+	ptr_zencod_dsa_do_sign = NULL ;
+	ptr_zencod_dsa_do_verify = NULL ;
+	ptr_zencod_dh_generate_key = NULL ;
+	ptr_zencod_dh_compute_key = NULL ;
+	ptr_zencod_rand_bytes = NULL ;
+	ptr_zencod_math_mod_exp = NULL ;
+	ptr_zencod_test = NULL ;
+	ptr_zencod_md5_init = NULL ;
+	ptr_zencod_md5_update = NULL ;
+	ptr_zencod_md5_do_final = NULL ;
+	ptr_zencod_sha1_init = NULL ;
+	ptr_zencod_sha1_update = NULL ;
+	ptr_zencod_sha1_do_final = NULL ;
+	ptr_zencod_xdes_cipher = NULL ;
+	ptr_zencod_rc4_cipher = NULL ;
+
+	return 0 ;
+}
+
+
+static int zencod_finish ( ENGINE *e )
+{
+
+	CHEESE () ;
+
+	/*
+	 * We Should add some tests for non NULL parameters or bad value !!
+	 * Stuff to be done ...
+	 */
+	if ( zencod_dso == NULL ) {
+		ZENCODerr ( ZENCOD_F_ZENCOD_FINISH, ZENCOD_R_NOT_LOADED ) ;
+		return 0 ;
+	}
+	if ( !DSO_free ( zencod_dso ) ) {
+		ZENCODerr ( ZENCOD_F_ZENCOD_FINISH, ZENCOD_R_DSO_FAILURE ) ;
+		return 0 ;
+	}
+
+	zencod_dso = NULL ;
+
+	ptr_zencod_bytes2bits = NULL ;
+	ptr_zencod_bits2bytes = NULL ;
+	ptr_zencod_new_number = NULL ;
+	ptr_zencod_init_number = NULL ;
+	ptr_zencod_rsa_mod_exp = NULL ;
+	ptr_zencod_rsa_mod_exp_crt = NULL ;
+	ptr_zencod_dsa_do_sign = NULL ;
+	ptr_zencod_dsa_do_verify = NULL ;
+	ptr_zencod_dh_generate_key = NULL ;
+	ptr_zencod_dh_compute_key = NULL ;
+	ptr_zencod_rand_bytes = NULL ;
+	ptr_zencod_math_mod_exp = NULL ;
+	ptr_zencod_test = NULL ;
+	ptr_zencod_md5_init = NULL ;
+	ptr_zencod_md5_update = NULL ;
+	ptr_zencod_md5_do_final = NULL ;
+	ptr_zencod_sha1_init = NULL ;
+	ptr_zencod_sha1_update = NULL ;
+	ptr_zencod_sha1_do_final = NULL ;
+	ptr_zencod_xdes_cipher = NULL ;
+	ptr_zencod_rc4_cipher = NULL ;
+
+	return 1 ;
+}
+
+
+static int zencod_ctrl ( ENGINE *e, int cmd, long i, void *p, void (*f) () )
+{
+
+	int initialised = ( ( zencod_dso == NULL ) ? 0 : 1 ) ;
+
+	CHEESE () ;
+
+	/*
+	 * We Should add some tests for non NULL parameters or bad value !!
+	 * Stuff to be done ...
+	 */
+	switch ( cmd ) {
+	case ZENCOD_CMD_SO_PATH :
+		if ( p == NULL ) {
+			ZENCODerr ( ZENCOD_F_ZENCOD_CTRL, ERR_R_PASSED_NULL_PARAMETER ) ;
+			return 0 ;
+		}
+		if ( initialised ) {
+			ZENCODerr ( ZENCOD_F_ZENCOD_CTRL, ZENCOD_R_ALREADY_LOADED ) ;
+			return 0 ;
+		}
+		ZENCOD_LIBNAME = (const char *) p ;
+		return 1 ;
+	default :
+		break ;
+	}
+
+	ZENCODerr ( ZENCOD_F_ZENCOD_CTRL, ZENCOD_R_CTRL_COMMAND_NOT_IMPLEMENTED ) ;
+
+	return 0 ;
+}
+
+
+/* BIGNUM stuff Functions
+ */
+static int zencod_bn_mod_exp ( BIGNUM *r, const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx )
+{
+	zen_nb_t y, x, e, n;
+	int ret;
+
+	CHEESE () ;
+
+	if ( !zencod_dso ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_BN_MOD_EXP, ZENCOD_R_NOT_LOADED);
+		return 0;
+	}
+
+	if ( !bn_wexpand(r, m->top + 1) ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_BN_MOD_EXP, ZENCOD_R_BN_EXPAND_FAIL);
+		return 0;
+	}
+
+	memset(r->d, 0, BN_num_bytes(m));
+
+	ptr_zencod_init_number ( &y, (r->dmax - 1) * sizeof (BN_ULONG) * 8, (unsigned char *) r->d ) ;
+	BIGNUM2ZEN ( &x, a ) ;
+	BIGNUM2ZEN ( &e, p ) ;
+	BIGNUM2ZEN ( &n, m ) ;
+
+	/* Must invert x and e parameter due to BN mod exp prototype ... */
+	ret = ptr_zencod_math_mod_exp ( &y, &e, &x, &n ) ;
+
+	if ( ret )  {
+		PERROR("zenbridge_math_mod_exp");
+		ENGINEerr(ZENCOD_F_ZENCOD_BN_MOD_EXP, ZENCOD_R_REQUEST_FAILED);
+		return 0;
+	}
+
+	r->top = (BN_num_bits(m) + BN_BITS2 - 1) / BN_BITS2;
+
+	return 1;
+}
+
+
+/* RSA stuff Functions
+ */
+#ifndef OPENSSL_NO_RSA
+static int RSA_zencod_rsa_mod_exp ( BIGNUM *r0, const BIGNUM *i, RSA *rsa )
+{
+
+	CHEESE () ;
+
+	if ( !zencod_dso ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_RSA_MOD_EXP_CRT, ZENCOD_R_NOT_LOADED);
+		return 0;
+	}
+
+	if ( !rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_RSA_MOD_EXP_CRT, ZENCOD_R_BAD_KEY_COMPONENTS);
+		return 0;
+	}
+
+	/* Do in software if argument is too large for hardware */
+	if ( RSA_size(rsa) * 8 > ZENBRIDGE_MAX_KEYSIZE_RSA_CRT ) {
+		const RSA_METHOD *meth;
+
+		meth = RSA_PKCS1_SSLeay();
+		return meth->rsa_mod_exp(r0, i, rsa);
+	} else {
+		zen_nb_t y, x, p, q, dmp1, dmq1, iqmp;
+
+		if ( !bn_expand(r0, RSA_size(rsa) * 8) ) {
+			ENGINEerr(ZENCOD_F_ZENCOD_RSA_MOD_EXP_CRT, ZENCOD_R_BN_EXPAND_FAIL);
+			return 0;
+		}
+		r0->top = (RSA_size(rsa) * 8 + BN_BITS2 - 1) / BN_BITS2;
+
+		BIGNUM2ZEN ( &x, i ) ;
+		BIGNUM2ZEN ( &y, r0 ) ;
+		BIGNUM2ZEN ( &p, rsa->p ) ;
+		BIGNUM2ZEN ( &q, rsa->q ) ;
+		BIGNUM2ZEN ( &dmp1, rsa->dmp1 ) ;
+		BIGNUM2ZEN ( &dmq1, rsa->dmq1 ) ;
+		BIGNUM2ZEN ( &iqmp, rsa->iqmp ) ;
+
+		if ( ptr_zencod_rsa_mod_exp_crt ( &y, &x, &p, &q, &dmp1, &dmq1, &iqmp ) < 0 ) {
+			PERROR("zenbridge_rsa_mod_exp_crt");
+			ENGINEerr(ZENCOD_F_ZENCOD_RSA_MOD_EXP_CRT, ZENCOD_R_REQUEST_FAILED);
+			return 0;
+		}
+
+		return 1;
+	}
+}
+
+
+/* This function is aliased to RSA_mod_exp (with the mont stuff dropped).
+ */
+static int RSA_zencod_bn_mod_exp ( BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+		const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx )
+{
+
+	CHEESE () ;
+
+	if ( !zencod_dso ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_RSA_MOD_EXP, ZENCOD_R_NOT_LOADED);
+		return 0;
+	}
+
+	/* Do in software if argument is too large for hardware */
+	if ( BN_num_bits(m) > ZENBRIDGE_MAX_KEYSIZE_RSA ) {
+		const RSA_METHOD *meth;
+
+		meth = RSA_PKCS1_SSLeay();
+		return meth->bn_mod_exp(r, a, p, m, ctx, m_ctx);
+	} else {
+		zen_nb_t y, x, e, n;
+
+		if ( !bn_expand(r, BN_num_bits(m)) ) {
+			ENGINEerr(ZENCOD_F_ZENCOD_RSA_MOD_EXP, ZENCOD_R_BN_EXPAND_FAIL);
+			return 0;
+		}
+		r->top = (BN_num_bits(m) + BN_BITS2 - 1) / BN_BITS2;
+
+		BIGNUM2ZEN ( &x, a ) ;
+		BIGNUM2ZEN ( &y, r ) ;
+		BIGNUM2ZEN ( &e, p ) ;
+		BIGNUM2ZEN ( &n, m ) ;
+
+		if ( ptr_zencod_rsa_mod_exp ( &y, &x, &n, &e ) < 0 ) {
+			PERROR("zenbridge_rsa_mod_exp");
+			ENGINEerr(ZENCOD_F_ZENCOD_RSA_MOD_EXP, ZENCOD_R_REQUEST_FAILED);
+			return 0;
+		}
+
+		return 1;
+	}
+}
+#endif /* !OPENSSL_NO_RSA */
+
+
+#ifndef OPENSSL_NO_DSA
+/* DSA stuff Functions
+ */
+static DSA_SIG *DSA_zencod_do_sign ( const unsigned char *dgst, int dlen, DSA *dsa )
+{
+	zen_nb_t p, q, g, x, y, r, s, data;
+	DSA_SIG *sig;
+	BIGNUM *bn_r = NULL;
+	BIGNUM *bn_s = NULL;
+	char msg[20];
+
+	CHEESE();
+
+	if ( !zencod_dso ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_DSA_DO_SIGN, ZENCOD_R_NOT_LOADED);
+		goto FAILED;
+	}
+
+	if ( dlen > 160 ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_DSA_DO_SIGN, ZENCOD_R_REQUEST_FAILED);
+		goto FAILED;
+	}
+
+	/* Do in software if argument is too large for hardware */
+	if ( BN_num_bits(dsa->p) > ZENBRIDGE_MAX_KEYSIZE_DSA_SIGN ||
+		BN_num_bits(dsa->g) > ZENBRIDGE_MAX_KEYSIZE_DSA_SIGN ) {
+		const DSA_METHOD *meth;
+		ENGINEerr(ZENCOD_F_ZENCOD_DSA_DO_SIGN, ZENCOD_R_BAD_KEY_COMPONENTS);
+		meth = DSA_OpenSSL();
+		return meth->dsa_do_sign(dgst, dlen, dsa);
+	}
+
+	if ( !(bn_s = BN_new()) || !(bn_r = BN_new()) ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_DSA_DO_SIGN, ZENCOD_R_BAD_KEY_COMPONENTS);
+		goto FAILED;
+	}
+
+	if ( !bn_expand(bn_r, 160) || !bn_expand(bn_s, 160) ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_DSA_DO_SIGN, ZENCOD_R_BN_EXPAND_FAIL);
+		goto FAILED;
+	}
+
+	bn_r->top = bn_s->top = (160 + BN_BITS2 - 1) / BN_BITS2;
+	BIGNUM2ZEN ( &p, dsa->p ) ;
+	BIGNUM2ZEN ( &q, dsa->q ) ;
+	BIGNUM2ZEN ( &g, dsa->g ) ;
+	BIGNUM2ZEN ( &x, dsa->priv_key ) ;
+	BIGNUM2ZEN ( &y, dsa->pub_key ) ;
+	BIGNUM2ZEN ( &r, bn_r ) ;
+	BIGNUM2ZEN ( &s, bn_s ) ;
+	q.len = x.len = 160;
+
+	ypcmem(msg, dgst, 20);
+	ptr_zencod_init_number ( &data, 160, msg ) ;
+
+	if ( ptr_zencod_dsa_do_sign ( 0, &data, &y, &p, &q, &g, &x, &r, &s ) < 0 ) {
+		PERROR("zenbridge_dsa_do_sign");
+		ENGINEerr(ZENCOD_F_ZENCOD_DSA_DO_SIGN, ZENCOD_R_REQUEST_FAILED);
+		goto FAILED;
+	}
+
+	if ( !( sig = DSA_SIG_new () ) ) {
+		ENGINEerr(ZENCOD_F_ZENCOD_DSA_DO_SIGN, ZENCOD_R_REQUEST_FAILED);
+		goto FAILED;
+	}
+	sig->r = bn_r;
+	sig->s = bn_s;
+	return sig;
+
+ FAILED:
+	if (bn_r)
+		BN_free(bn_r);
+	if (bn_s)
+		BN_free(bn_s);
+	return NULL;