Commit a slightly modified version of an old experiment to do RSA private

key operations using the GMP library. The default is not to build (or use)
this code unless OPENSSL_USE_GMP is defined (because it will impose header
and linker dependencies that might need specifying too).

engines/.cvsignore

 Makefile.save
 lib
+libs

engines/Makefile.ssl

@@ -27,12 +27,13 @@ TEST=
 APPS=
 
 LIB=$(TOP)/libcrypto.a
-LIBNAMES= 4758_cca aep atalla cswift ncipher nuron sureware ubsec
+LIBNAMES= 4758_cca aep atalla cswift gmp ncipher nuron sureware ubsec
 
 LIBSRC=	e_4758_cca.c \
 	e_aep.c \
 	e_atalla.c \
 	e_cswift.c \
+	e_gmp.c \
 	e_ncipher.c \
 	e_nuron.c \
 	e_sureware.c \
@@ -41,6 +42,7 @@ LIBOBJ= e_4758_cca.o \
 	e_aep.o \
 	e_atalla.o \
 	e_cswift.o \
+	e_gmp.o \
 	e_ncipher.o \
 	e_nuron.o \
 	e_sureware.o \
@@ -53,6 +55,7 @@ HEADER=	e_4758_cca_err.c e_4758_cca_err.h \
 	e_aep_err.c e_aep_err.h \
 	e_atalla_err.c e_atalla_err.h \
 	e_cswift_err.c e_cswift_err.h \
+	e_gmp_err.c e_gmp_err.h \
 	e_ncipher_err.c e_ncipher_err.h \
 	e_nuron_err.c e_nuron_err.h \
 	e_sureware_err.c e_sureware_err.h \

engines/e_gmp.c

+/* crypto/engine/e_gmp.c */
+/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
+ * project 2003.
+ */
+/* ====================================================================
+ * 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).
+ *
+ */
+
+/* This engine is not (currently) compiled in by default. Do enable it,
+ * reconfigure OpenSSL with "-DOPENSSL_USE_GMP -lgmp". The GMP libraries and
+ * headers must reside in one of the paths searched by the compiler/linker,
+ * otherwise paths must be specified - eg. try configuring with
+ * "-DOPENSSL_USE_GMP -I<includepath> -L<libpath> -lgmp". YMMV. */
+
+/* As for what this does - it's a largely unoptimised implementation of an
+ * ENGINE that uses the GMP library to perform RSA private key operations. To
+ * obtain more information about what "unoptimised" means, see my original mail
+ * on the subject (though ignore the build instructions which have since
+ * changed);
+ *
+ *    http://www.mail-archive.com/openssl-dev@openssl.org/msg12227.html
+ *
+ * On my athlon system at least, it appears the builtin OpenSSL code is now
+ * slightly faster, which is to say that the RSA-related MPI performance
+ * between OpenSSL's BIGNUM and GMP's mpz implementations is probably pretty
+ * balanced for this chip, and so the performance degradation in this ENGINE by
+ * having to convert to/from GMP formats (and not being able to cache
+ * montgomery forms) is probably the difference. However, if some unconfirmed
+ * reports from users is anything to go by, the situation on some other
+ * chipsets might be a good deal more favourable to the GMP version (eg. PPC).
+ * Feedback welcome. */
+
+#include <stdio.h>
+#include <string.h>
+#include <openssl/crypto.h>
+#include <openssl/buffer.h>
+#include <openssl/engine.h>
+
+#ifndef OPENSSL_NO_HW
+#if defined(OPENSSL_USE_GMP) && !defined(OPENSSL_NO_HW_GMP)
+
+#include <gmp.h>
+
+#define E_GMP_LIB_NAME "gmp engine"
+#include "e_gmp_err.c"
+
+static int e_gmp_destroy(ENGINE *e);
+static int e_gmp_init(ENGINE *e);
+static int e_gmp_finish(ENGINE *e);
+static int e_gmp_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)()); 
+
+#ifndef OPENSSL_NO_RSA
+/* RSA stuff */
+static int e_gmp_rsa_mod_exp(BIGNUM *r, const BIGNUM *I, RSA *rsa);
+static int e_gmp_rsa_finish(RSA *r);
+#endif
+
+/* The definitions for control commands specific to this engine */
+/* #define E_GMP_CMD_SO_PATH		ENGINE_CMD_BASE */
+static const ENGINE_CMD_DEFN e_gmp_cmd_defns[] = {
+#if 0
+	{E_GMP_CMD_SO_PATH,
+		"SO_PATH",
+		"Specifies the path to the 'e_gmp' shared library",
+		ENGINE_CMD_FLAG_STRING},
+#endif
+	{0, NULL, NULL, 0}
+	};
+
+#ifndef OPENSSL_NO_RSA
+/* Our internal RSA_METHOD that we provide pointers to */
+static RSA_METHOD e_gmp_rsa =
+	{
+	"GMP RSA method",
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	e_gmp_rsa_mod_exp,
+	NULL,
+	NULL,
+	e_gmp_rsa_finish,
+	/* These flags initialise montgomery crud that GMP ignores, however it
+	 * makes sure the public key ops (which are done in openssl) don't seem
+	 * *slower* than usual :-) */
+	RSA_FLAG_CACHE_PUBLIC|RSA_FLAG_CACHE_PRIVATE,
+	NULL,
+	NULL,
+	NULL
+	};
+#endif
+
+/* Constants used when creating the ENGINE */
+static const char *engine_e_gmp_id = "gmp";
+static const char *engine_e_gmp_name = "GMP engine support";
+
+/* This internal function is used by ENGINE_gmp() and possibly by the
+ * "dynamic" ENGINE support too */
+static int bind_helper(ENGINE *e)
+	{
+#ifndef OPENSSL_NO_RSA
+	const RSA_METHOD *meth1;
+#endif
+	if(!ENGINE_set_id(e, engine_e_gmp_id) ||
+			!ENGINE_set_name(e, engine_e_gmp_name) ||
+#ifndef OPENSSL_NO_RSA
+			!ENGINE_set_RSA(e, &e_gmp_rsa) ||
+#endif
+			!ENGINE_set_destroy_function(e, e_gmp_destroy) ||
+			!ENGINE_set_init_function(e, e_gmp_init) ||
+			!ENGINE_set_finish_function(e, e_gmp_finish) ||
+			!ENGINE_set_ctrl_function(e, e_gmp_ctrl) ||
+			!ENGINE_set_cmd_defns(e, e_gmp_cmd_defns))
+		return 0;
+
+#ifndef OPENSSL_NO_RSA
+	meth1 = RSA_PKCS1_SSLeay();
+	e_gmp_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
+	e_gmp_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
+	e_gmp_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
+	e_gmp_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
+	e_gmp_rsa.bn_mod_exp = meth1->bn_mod_exp;
+#endif
+
+	/* Ensure the e_gmp error handling is set up */
+	ERR_load_GMP_strings();
+	return 1;
+	}
+
+static ENGINE *engine_gmp(void)
+	{
+	ENGINE *ret = ENGINE_new();
+	if(!ret)
+		return NULL;
+	if(!bind_helper(ret))
+		{
+		ENGINE_free(ret);
+		return NULL;
+		}
+	return ret;
+	}
+
+void ENGINE_load_gmp(void)
+	{
+	/* Copied from eng_[openssl|dyn].c */
+	ENGINE *toadd = engine_gmp();
+	if(!toadd) return;
+	ENGINE_add(toadd);
+	ENGINE_free(toadd);
+	ERR_clear_error();
+	}
+
+#ifndef OPENSSL_NO_RSA
+/* Used to attach our own key-data to an RSA structure */
+static int hndidx_rsa = -1;
+#endif
+
+static int e_gmp_destroy(ENGINE *e)
+	{
+	ERR_unload_GMP_strings();
+	return 1;
+	}
+
+/* (de)initialisation functions. */
+static int e_gmp_init(ENGINE *e)
+	{
+#ifndef OPENSSL_NO_RSA
+	if (hndidx_rsa == -1)
+		hndidx_rsa = RSA_get_ex_new_index(0,
+			"GMP-based RSA key handle",
+			NULL, NULL, NULL);
+#endif
+	if (hndidx_rsa == -1)
+		return 0;
+	return 1;
+	}
+
+static int e_gmp_finish(ENGINE *e)
+	{
+	return 1;
+	}
+
+static int e_gmp_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
+	{
+	int to_return = 1;
+
+	switch(cmd)
+		{
+#if 0
+	case E_GMP_CMD_SO_PATH:
+		/* ... */
+#endif
+	/* The command isn't understood by this engine */
+	default:
+		GMPerr(GMP_F_E_GMP_CTRL,
+			GMP_R_CTRL_COMMAND_NOT_IMPLEMENTED);
+		to_return = 0;
+		break;
+		}
+
+	return to_return;
+	}
+
+/* HACK - use text I/O functions in openssl and GMP to handle conversions. This
+ * is vile. */
+static int bn2gmp(const BIGNUM *bn, mpz_t g)
+	{
+	int toret;
+	char *tmpchar = BN_bn2hex(bn);
+	if(!tmpchar) return 0;
+	toret = (mpz_set_str(g, tmpchar, 16) == 0 ? 1 : 0);
+	OPENSSL_free(tmpchar);
+	return toret;
+	}
+
+static int gmp2bn(mpz_t g, BIGNUM *bn)
+	{
+	int toret;
+	char *tmpchar = OPENSSL_malloc(mpz_sizeinbase(g, 16) + 10);
+	if(!tmpchar) return 0;
+	mpz_get_str(tmpchar, 16, g);
+	toret = BN_hex2bn(&bn, tmpchar);
+	OPENSSL_free(tmpchar);
+	return toret;
+	}
+
+#ifndef OPENSSL_NO_RSA 
+typedef struct st_e_gmp_rsa_ctx
+	{
+	int public_only;
+	mpz_t n;
+	mpz_t d;
+	mpz_t e;
+	mpz_t p;
+	mpz_t q;
+	mpz_t dmp1;
+	mpz_t dmq1;
+	mpz_t iqmp;
+	mpz_t r0, r1, I0, m1;
+	} E_GMP_RSA_CTX;
+
+static E_GMP_RSA_CTX *e_gmp_get_rsa(RSA *rsa)
+	{
+	E_GMP_RSA_CTX *hptr = RSA_get_ex_data(rsa, hndidx_rsa);
+	if(hptr) return hptr;
+	hptr = OPENSSL_malloc(sizeof(E_GMP_RSA_CTX));
+	if(!hptr) return NULL;
+	/* These inits could probably be replaced by more intelligent
+	 * mpz_init2() versions, to reduce malloc-thrashing. */
+	mpz_init(hptr->n);
+	mpz_init(hptr->d);
+	mpz_init(hptr->e);
+	mpz_init(hptr->p);
+	mpz_init(hptr->q);
+	mpz_init(hptr->dmp1);
+	mpz_init(hptr->dmq1);
+	mpz_init(hptr->iqmp);
+	mpz_init(hptr->r0);
+	mpz_init(hptr->r1);
+	mpz_init(hptr->I0);
+	mpz_init(hptr->m1);
+	if(!bn2gmp(rsa->n, hptr->n) || !bn2gmp(rsa->e, hptr->e))
+		goto err;
+	if(!rsa->p || !rsa->q || !rsa->d || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
+		{
+		hptr->public_only = 1;
+		return hptr;
+		}
+	if(!bn2gmp(rsa->d, hptr->d) || !bn2gmp(rsa->p, hptr->p) ||
+			!bn2gmp(rsa->q, hptr->q) || !bn2gmp(rsa->dmp1, hptr->dmp1) ||
+			!bn2gmp(rsa->dmq1, hptr->dmq1) || !bn2gmp(rsa->iqmp, hptr->iqmp))
+		goto err;
+	hptr->public_only = 0;
+	RSA_set_ex_data(rsa, hndidx_rsa, hptr);
+	return hptr;
+err:
+	mpz_clear(hptr->n);
+	mpz_clear(hptr->d);
+	mpz_clear(hptr->e);
+	mpz_clear(hptr->p);
+	mpz_clear(hptr->q);
+	mpz_clear(hptr->dmp1);
+	mpz_clear(hptr->dmq1);
+	mpz_clear(hptr->iqmp);
+	mpz_clear(hptr->r0);
+	mpz_clear(hptr->r1);
+	mpz_clear(hptr->I0);
+	mpz_clear(hptr->m1);
+	OPENSSL_free(hptr);
+	return NULL;
+	}
+
+static int e_gmp_rsa_finish(RSA *rsa)
+	{
+	E_GMP_RSA_CTX *hptr = RSA_get_ex_data(rsa, hndidx_rsa);
+	if(!hptr) return 0;
+	mpz_clear(hptr->n);
+	mpz_clear(hptr->d);
+	mpz_clear(hptr->e);
+	mpz_clear(hptr->p);
+	mpz_clear(hptr->q);
+	mpz_clear(hptr->dmp1);
+	mpz_clear(hptr->dmq1);
+	mpz_clear(hptr->iqmp);
+	mpz_clear(hptr->r0);
+	mpz_clear(hptr->r1);
+	mpz_clear(hptr->I0);
+	mpz_clear(hptr->m1);
+	OPENSSL_free(hptr);
+	RSA_set_ex_data(rsa, hndidx_rsa, NULL);
+	return 1;
+	}
+
+static int e_gmp_rsa_mod_exp(BIGNUM *r, const BIGNUM *I, RSA *rsa)
+	{
+	E_GMP_RSA_CTX *hptr;
+	int to_return = 0;
+
+	hptr = e_gmp_get_rsa(rsa);
+	if(!hptr)
+		{
+		GMPerr(GMP_F_E_GMP_RSA_MOD_EXP,
+				GMP_R_KEY_CONTEXT_ERROR);
+		return 0;
+		}
+	if(hptr->public_only)
+		{
+		GMPerr(GMP_F_E_GMP_RSA_MOD_EXP,
+				GMP_R_MISSING_KEY_COMPONENTS);
+		return 0;
+		}
+
+	/* ugh!!! */
+	if(!bn2gmp(I, hptr->I0))
+		return 0;
+
+	/* This is basically the CRT logic in crypto/rsa/rsa_eay.c reworded into
+	 * GMP-speak. It may be that GMP's API facilitates cleaner formulations
+	 * of this stuff, eg. better handling of negatives, or functions that
+	 * combine operations. */
+
+	mpz_mod(hptr->r1, hptr->I0, hptr->q);
+	mpz_powm(hptr->m1, hptr->r1, hptr->dmq1, hptr->q);
+
+	mpz_mod(hptr->r1, hptr->I0, hptr->p);
+	mpz_powm(hptr->r0, hptr->r1, hptr->dmp1, hptr->p);
+
+	mpz_sub(hptr->r0, hptr->r0, hptr->m1);
+
+	if(mpz_sgn(hptr->r0) < 0)
+		mpz_add(hptr->r0, hptr->r0, hptr->p);
+	mpz_mul(hptr->r1, hptr->r0, hptr->iqmp);
+	mpz_mod(hptr->r0, hptr->r1, hptr->p);
+
+	if(mpz_sgn(hptr->r0) < 0)
+		mpz_add(hptr->r0, hptr->r0, hptr->p);
+	mpz_mul(hptr->r1, hptr->r0, hptr->q);
+	mpz_add(hptr->r0, hptr->r1, hptr->m1);
+
+	/* ugh!!! */
+	if(gmp2bn(hptr->r0, r))
+		to_return = 1;
+
+	return 1;
+	}
+#endif
+
+/* This stuff is needed if this ENGINE is being compiled into a self-contained
+ * shared-library. */	   
+#ifdef ENGINE_DYNAMIC_SUPPORT
+static int bind_fn(ENGINE *e, const char *id)
+	{
+	if(id && (strcmp(id, engine_e_gmp_id) != 0))
+		return 0;
+	if(!bind_helper(e))
+		return 0;
+	return 1;
+	}       
+IMPLEMENT_DYNAMIC_CHECK_FN()
+IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
+#endif /* ENGINE_DYNAMIC_SUPPORT */
+
+#endif /* !OPENSSL_NO_HW_GMP */
+#endif /* !OPENSSL_NO_HW */
+

engines/e_gmp.ec

+L GMP		e_gmp_err.h			e_gmp_err.c

engines/e_gmp_err.c

+/* e_gmp_err.c */
+/* ====================================================================
+ * Copyright (c) 1999-2002 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
+ *    openssl-core@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).
+ *
+ */
+
+/* NOTE: this file was auto generated by the mkerr.pl script: any changes
+ * made to it will be overwritten when the script next updates this file,
+ * only reason strings will be preserved.
+ */
+
+#include <stdio.h>
+#include <openssl/err.h>
+#include "e_gmp_err.h"
+
+/* BEGIN ERROR CODES */
+#ifndef OPENSSL_NO_ERR
+static ERR_STRING_DATA GMP_str_functs[]=
+	{
+{ERR_PACK(0,GMP_F_E_GMP_CTRL,0),	"E_GMP_CTRL"},
+{ERR_PACK(0,GMP_F_E_GMP_RSA_MOD_EXP,0),	"E_GMP_RSA_MOD_EXP"},
+{0,NULL}
+	};
+
+static ERR_STRING_DATA GMP_str_reasons[]=
+	{
+{GMP_R_CTRL_COMMAND_NOT_IMPLEMENTED      ,"ctrl command not implemented"},
+{GMP_R_KEY_CONTEXT_ERROR                 ,"key context error"},
+{GMP_R_MISSING_KEY_COMPONENTS            ,"missing key components"},
+{0,NULL}
+	};
+
+#endif
+
+#ifdef GMP_LIB_NAME
+static ERR_STRING_DATA GMP_lib_name[]=
+        {
+{0	,GMP_LIB_NAME},
+{0,NULL}
+	};
+#endif
+
+
+static int GMP_lib_error_code=0;
+static int GMP_error_init=1;
+
+static void ERR_load_GMP_strings(void)
+	{
+	if (GMP_lib_error_code == 0)
+		GMP_lib_error_code=ERR_get_next_error_library();
+
+	if (GMP_error_init)
+		{
+		GMP_error_init=0;
+#ifndef OPENSSL_NO_ERR
+		ERR_load_strings(GMP_lib_error_code,GMP_str_functs);
+		ERR_load_strings(GMP_lib_error_code,GMP_str_reasons);
+#endif
+
+#ifdef GMP_LIB_NAME
+		GMP_lib_name->error = ERR_PACK(GMP_lib_error_code,0,0);
+		ERR_load_strings(0,GMP_lib_name);
+#endif
+		}
+	}
+
+static void ERR_unload_GMP_strings(void)
+	{
+	if (GMP_error_init == 0)
+		{
+#ifndef OPENSSL_NO_ERR
+		ERR_unload_strings(GMP_lib_error_code,GMP_str_functs);
+		ERR_unload_strings(GMP_lib_error_code,GMP_str_reasons);
+#endif
+
+#ifdef GMP_LIB_NAME
+		ERR_unload_strings(0,GMP_lib_name);
+#endif
+		GMP_error_init=1;
+		}
+	}
+
+static void ERR_GMP_error(int function, int reason, char *file, int line)
+	{
+	if (GMP_lib_error_code == 0)
+		GMP_lib_error_code=ERR_get_next_error_library();
+	ERR_PUT_error(GMP_lib_error_code,function,reason,file,line);
+	}

engines/e_gmp_err.h

+/* ====================================================================
+ * Copyright (c) 2001-2002 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
+ *    openssl-core@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).
+ *
+ */
+
+#ifndef HEADER_GMP_ERR_H
+#define HEADER_GMP_ERR_H
+
+/* BEGIN ERROR CODES */
+/* The following lines are auto generated by the script mkerr.pl. Any changes
+ * made after this point may be overwritten when the script is next run.
+ */
+static void ERR_load_GMP_strings(void);
+static void ERR_unload_GMP_strings(void);
+static void ERR_GMP_error(int function, int reason, char *file, int line);
+#define GMPerr(f,r) ERR_GMP_error((f),(r),__FILE__,__LINE__)
+
+/* Error codes for the GMP functions. */
+
+/* Function codes. */
+#define GMP_F_E_GMP_CTRL				 100
+#define GMP_F_E_GMP_RSA_MOD_EXP				 101
+
+/* Reason codes. */
+#define GMP_R_CTRL_COMMAND_NOT_IMPLEMENTED		 100
+#define GMP_R_KEY_CONTEXT_ERROR				 101
+#define GMP_R_MISSING_KEY_COMPONENTS			 102
+
+#ifdef  __cplusplus
+}
+#endif
+#endif