Add crypto libraries

5 files changed, 735 insertions, 0 deletions

diff --git a/Cryptlib/OpenSSL/crypto/ecdh/ech_err.c b/Cryptlib/OpenSSL/crypto/ecdh/ech_err.c
new file mode 100755
index 00000000..4d2ede75
--- /dev/null
+++ b/Cryptlib/OpenSSL/crypto/ecdh/ech_err.c
@@ -0,0 +1,98 @@
+/* crypto/ecdh/ech_err.c */
+/* ====================================================================
+ * Copyright (c) 1999-2005 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 <openssl/ecdh.h>
+
+/* BEGIN ERROR CODES */
+#ifndef OPENSSL_NO_ERR
+
+#define ERR_FUNC(func) ERR_PACK(ERR_LIB_ECDH,func,0)
+#define ERR_REASON(reason) ERR_PACK(ERR_LIB_ECDH,0,reason)
+
+static ERR_STRING_DATA ECDH_str_functs[]=
+	{
+{ERR_FUNC(ECDH_F_ECDH_COMPUTE_KEY),	"ECDH_compute_key"},
+{ERR_FUNC(ECDH_F_ECDH_DATA_NEW_METHOD),	"ECDH_DATA_NEW_METHOD"},
+{0,NULL}
+	};
+
+static ERR_STRING_DATA ECDH_str_reasons[]=
+	{
+{ERR_REASON(ECDH_R_KDF_FAILED)           ,"KDF failed"},
+{ERR_REASON(ECDH_R_NO_PRIVATE_VALUE)     ,"no private value"},
+{ERR_REASON(ECDH_R_POINT_ARITHMETIC_FAILURE),"point arithmetic failure"},
+{0,NULL}
+	};
+
+#endif
+
+void ERR_load_ECDH_strings(void)
+	{
+#ifndef OPENSSL_NO_ERR
+
+	if (ERR_func_error_string(ECDH_str_functs[0].error) == NULL)
+		{
+		ERR_load_strings(0,ECDH_str_functs);
+		ERR_load_strings(0,ECDH_str_reasons);
+		}
+#endif
+	}
diff --git a/Cryptlib/OpenSSL/crypto/ecdh/ech_key.c b/Cryptlib/OpenSSL/crypto/ecdh/ech_key.c
new file mode 100755
index 00000000..f44da929
--- /dev/null
+++ b/Cryptlib/OpenSSL/crypto/ecdh/ech_key.c
@@ -0,0 +1,83 @@
+/* crypto/ecdh/ecdh_key.c */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
+ * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
+ * to the OpenSSL project.
+ *
+ * The ECC Code is licensed pursuant to the OpenSSL open source
+ * license provided below.
+ *
+ * The ECDH software is originally written by Douglas Stebila of
+ * Sun Microsystems Laboratories.
+ *
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2003 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).
+ *
+ */
+
+#include "ech_locl.h"
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+
+int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
+	EC_KEY *eckey,
+	void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen))
+{
+	ECDH_DATA *ecdh = ecdh_check(eckey);
+	if (ecdh == NULL)
+		return 0;
+	return ecdh->meth->compute_key(out, outlen, pub_key, eckey, KDF);
+}
diff --git a/Cryptlib/OpenSSL/crypto/ecdh/ech_lib.c b/Cryptlib/OpenSSL/crypto/ecdh/ech_lib.c
new file mode 100755
index 00000000..e89b1d47
--- /dev/null
+++ b/Cryptlib/OpenSSL/crypto/ecdh/ech_lib.c
@@ -0,0 +1,247 @@
+/* crypto/ecdh/ech_lib.c */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
+ * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
+ * to the OpenSSL project.
+ *
+ * The ECC Code is licensed pursuant to the OpenSSL open source
+ * license provided below.
+ *
+ * The ECDH software is originally written by Douglas Stebila of
+ * Sun Microsystems Laboratories.
+ *
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2003 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).
+ *
+ */
+
+#include "ech_locl.h"
+#include <string.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+#include <openssl/err.h>
+
+const char ECDH_version[]="ECDH" OPENSSL_VERSION_PTEXT;
+
+static const ECDH_METHOD *default_ECDH_method = NULL;
+
+static void *ecdh_data_new(void);
+static void *ecdh_data_dup(void *);
+static void  ecdh_data_free(void *);
+
+void ECDH_set_default_method(const ECDH_METHOD *meth)
+	{
+	default_ECDH_method = meth;
+	}
+
+const ECDH_METHOD *ECDH_get_default_method(void)
+	{
+	if(!default_ECDH_method) 
+		default_ECDH_method = ECDH_OpenSSL();
+	return default_ECDH_method;
+	}
+
+int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
+	{
+	const ECDH_METHOD *mtmp;
+	ECDH_DATA *ecdh;
+
+	ecdh = ecdh_check(eckey);
+
+	if (ecdh == NULL)
+		return 0;
+
+        mtmp = ecdh->meth;
+#if 0
+        if (mtmp->finish)
+		mtmp->finish(eckey);
+#endif
+#ifndef OPENSSL_NO_ENGINE
+	if (ecdh->engine)
+		{
+		ENGINE_finish(ecdh->engine);
+		ecdh->engine = NULL;
+		}
+#endif
+        ecdh->meth = meth;
+#if 0
+        if (meth->init) 
+		meth->init(eckey);
+#endif
+        return 1;
+	}
+
+static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine)
+	{
+	ECDH_DATA *ret;
+
+	ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA));
+	if (ret == NULL)
+		{
+		ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
+		return(NULL);
+		}
+
+	ret->init = NULL;
+
+	ret->meth = ECDH_get_default_method();
+	ret->engine = engine;
+#ifndef OPENSSL_NO_ENGINE
+	if (!ret->engine)
+		ret->engine = ENGINE_get_default_ECDH();
+	if (ret->engine)
+		{
+		ret->meth = ENGINE_get_ECDH(ret->engine);
+		if (!ret->meth)
+			{
+			ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
+			ENGINE_finish(ret->engine);
+			OPENSSL_free(ret);
+			return NULL;
+			}
+		}
+#endif
+
+	ret->flags = ret->meth->flags;
+	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
+#if 0
+	if ((ret->meth->init != NULL) && !ret->meth->init(ret))
+		{
+		CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
+		OPENSSL_free(ret);
+		ret=NULL;
+		}
+#endif	
+	return(ret);
+	}
+
+static void *ecdh_data_new(void)
+	{
+	return (void *)ECDH_DATA_new_method(NULL);
+	}
+
+static void *ecdh_data_dup(void *data)
+{
+	ECDH_DATA *r = (ECDH_DATA *)data;
+
+	/* XXX: dummy operation */
+	if (r == NULL)
+		return NULL;
+
+	return (void *)ecdh_data_new();
+}
+
+void ecdh_data_free(void *data)
+	{
+	ECDH_DATA *r = (ECDH_DATA *)data;
+
+#ifndef OPENSSL_NO_ENGINE
+	if (r->engine)
+		ENGINE_finish(r->engine);
+#endif
+
+	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
+
+	OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA));
+
+	OPENSSL_free(r);
+	}
+
+ECDH_DATA *ecdh_check(EC_KEY *key)
+	{
+	ECDH_DATA *ecdh_data;
+ 
+	void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup,
+					ecdh_data_free, ecdh_data_free);
+	if (data == NULL)
+	{
+		ecdh_data = (ECDH_DATA *)ecdh_data_new();
+		if (ecdh_data == NULL)
+			return NULL;
+		EC_KEY_insert_key_method_data(key, (void *)ecdh_data,
+			ecdh_data_dup, ecdh_data_free, ecdh_data_free);
+	}
+	else
+		ecdh_data = (ECDH_DATA *)data;
+	
+
+	return ecdh_data;
+	}
+
+int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
+	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
+	{
+	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp,
+				new_func, dup_func, free_func);
+	}
+
+int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
+	{
+	ECDH_DATA *ecdh;
+	ecdh = ecdh_check(d);
+	if (ecdh == NULL)
+		return 0;
+	return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg));
+	}
+
+void *ECDH_get_ex_data(EC_KEY *d, int idx)
+	{
+	ECDH_DATA *ecdh;
+	ecdh = ecdh_check(d);
+	if (ecdh == NULL)
+		return NULL;
+	return(CRYPTO_get_ex_data(&ecdh->ex_data,idx));
+	}
diff --git a/Cryptlib/OpenSSL/crypto/ecdh/ech_locl.h b/Cryptlib/OpenSSL/crypto/ecdh/ech_locl.h
new file mode 100644
index 00000000..f658526a
--- /dev/null
+++ b/Cryptlib/OpenSSL/crypto/ecdh/ech_locl.h
@@ -0,0 +1,94 @@
+/* crypto/ecdh/ech_locl.h */
+/* ====================================================================
+ * Copyright (c) 2000-2005 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).
+ *
+ */
+
+#ifndef HEADER_ECH_LOCL_H
+#define HEADER_ECH_LOCL_H
+
+#include <openssl/ecdh.h>
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+struct ecdh_method 
+	{
+	const char *name;
+	int (*compute_key)(void *key, size_t outlen, const EC_POINT *pub_key, EC_KEY *ecdh,
+	                   void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen));
+#if 0
+	int (*init)(EC_KEY *eckey);
+	int (*finish)(EC_KEY *eckey);
+#endif
+	int flags;
+	char *app_data;
+	};
+
+typedef struct ecdh_data_st {
+	/* EC_KEY_METH_DATA part */
+	int (*init)(EC_KEY *);
+	/* method specific part */
+	ENGINE	*engine;
+	int	flags;
+	const ECDH_METHOD *meth;
+	CRYPTO_EX_DATA ex_data;
+} ECDH_DATA;
+
+ECDH_DATA *ecdh_check(EC_KEY *);
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif /* HEADER_ECH_LOCL_H */
diff --git a/Cryptlib/OpenSSL/crypto/ecdh/ech_ossl.c b/Cryptlib/OpenSSL/crypto/ecdh/ech_ossl.c
new file mode 100755
index 00000000..2a40ff12
--- /dev/null
+++ b/Cryptlib/OpenSSL/crypto/ecdh/ech_ossl.c
@@ -0,0 +1,213 @@
+/* crypto/ecdh/ech_ossl.c */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
+ * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
+ * to the OpenSSL project.
+ *
+ * The ECC Code is licensed pursuant to the OpenSSL open source
+ * license provided below.
+ *
+ * The ECDH software is originally written by Douglas Stebila of
+ * Sun Microsystems Laboratories.
+ *
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2003 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).
+ *
+ */
+
+
+#include <string.h>
+#include <limits.h>
+
+#include "cryptlib.h"
+
+#include "ech_locl.h"
+#include <openssl/err.h>
+#include <openssl/sha.h>
+#include <openssl/obj_mac.h>
+#include <openssl/bn.h>
+
+static int ecdh_compute_key(void *out, size_t len, const EC_POINT *pub_key,
+	EC_KEY *ecdh, 
+	void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen));
+
+static ECDH_METHOD openssl_ecdh_meth = {
+	"OpenSSL ECDH method",
+	ecdh_compute_key,
+#if 0
+	NULL, /* init     */
+	NULL, /* finish   */
+#endif
+	0,    /* flags    */
+	NULL  /* app_data */
+};
+
+const ECDH_METHOD *ECDH_OpenSSL(void)
+	{
+	return &openssl_ecdh_meth;
+	}
+
+
+/* This implementation is based on the following primitives in the IEEE 1363 standard:
+ *  - ECKAS-DH1
+ *  - ECSVDP-DH
+ * Finally an optional KDF is applied.
+ */
+static int ecdh_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
+	EC_KEY *ecdh,
+	void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen))
+	{
+	BN_CTX *ctx;
+	EC_POINT *tmp=NULL;
+	BIGNUM *x=NULL, *y=NULL;
+	const BIGNUM *priv_key;
+	const EC_GROUP* group;
+	int ret= -1;
+	size_t buflen, len;
+	unsigned char *buf=NULL;
+
+	if (outlen > INT_MAX)
+		{
+		ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE); /* sort of, anyway */
+		return -1;
+		}
+
+	if ((ctx = BN_CTX_new()) == NULL) goto err;
+	BN_CTX_start(ctx);
+	x = BN_CTX_get(ctx);
+	y = BN_CTX_get(ctx);
+	
+	priv_key = EC_KEY_get0_private_key(ecdh);
+	if (priv_key == NULL)
+		{
+		ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_NO_PRIVATE_VALUE);
+		goto err;
+		}
+
+	group = EC_KEY_get0_group(ecdh);
+	if ((tmp=EC_POINT_new(group)) == NULL)
+		{
+		ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+
+	if (!EC_POINT_mul(group, tmp, NULL, pub_key, priv_key, ctx)) 
+		{
+		ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
+		goto err;
+		}
+		
+	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) 
+		{
+		if (!EC_POINT_get_affine_coordinates_GFp(group, tmp, x, y, ctx)) 
+			{
+			ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
+			goto err;
+			}
+		}
+	else
+		{
+		if (!EC_POINT_get_affine_coordinates_GF2m(group, tmp, x, y, ctx)) 
+			{
+			ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
+			goto err;
+			}
+		}
+
+	buflen = (EC_GROUP_get_degree(group) + 7)/8;
+	len = BN_num_bytes(x);
+	if (len > buflen)
+		{
+		ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_INTERNAL_ERROR);
+		goto err;
+		}
+	if ((buf = OPENSSL_malloc(buflen)) == NULL)
+		{
+		ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+	
+	memset(buf, 0, buflen - len);
+	if (len != (size_t)BN_bn2bin(x, buf + buflen - len))
+		{
+		ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_BN_LIB);
+		goto err;
+		}
+
+	if (KDF != 0)
+		{
+		if (KDF(buf, buflen, out, &outlen) == NULL)
+			{
+			ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_KDF_FAILED);
+			goto err;
+			}
+		ret = outlen;
+		}
+	else
+		{
+		/* no KDF, just copy as much as we can */
+		if (outlen > buflen)
+			outlen = buflen;
+		memcpy(out, buf, outlen);
+		ret = outlen;
+		}
+	
+err:
+	if (tmp) EC_POINT_free(tmp);
+	if (ctx) BN_CTX_end(ctx);
+	if (ctx) BN_CTX_free(ctx);
+	if (buf) OPENSSL_free(buf);
+	return(ret);
+	}