Import of old SSLeay release: SSLeay 0.8.1b

19 files changed, 1460 insertions, 0 deletions

diff --git a/crypto/dh/Makefile.ssl b/crypto/dh/Makefile.ssl
new file mode 100644
index 0000000000..7e0c1e1049
--- /dev/null
+++ b/crypto/dh/Makefile.ssl
@@ -0,0 +1,84 @@
+#
+# SSLeay/crypto/dh/Makefile
+#
+
+DIR=	dh
+TOP=	../..
+CC=	cc
+INCLUDES= -I.. -I../../include
+CFLAG=-g
+INSTALLTOP=/usr/local/ssl
+MAKE=		make -f Makefile.ssl
+MAKEDEPEND=	makedepend -f Makefile.ssl
+MAKEFILE=	Makefile.ssl
+AR=		ar r
+
+CFLAGS= $(INCLUDES) $(CFLAG)
+
+ERR=dh
+ERRC=dh_err
+GENERAL=Makefile
+TEST= dhtest.c
+APPS=
+
+LIB=$(TOP)/libcrypto.a
+LIBSRC= dh_gen.c dh_key.c dh_lib.c dh_check.c $(ERRC).c
+LIBOBJ= dh_gen.o dh_key.o dh_lib.o dh_check.o $(ERRC).o
+
+SRC= $(LIBSRC)
+
+EXHEADER= dh.h
+HEADER=	$(EXHEADER)
+
+ALL=    $(GENERAL) $(SRC) $(HEADER)
+
+top:
+	(cd ../..; $(MAKE) DIRS=crypto SDIRS=$(DIR) sub_all)
+
+all:	lib
+
+lib:	$(LIBOBJ)
+	$(AR) $(LIB) $(LIBOBJ)
+	sh $(TOP)/util/ranlib.sh $(LIB)
+	@touch lib
+
+files:
+	perl $(TOP)/util/files.pl Makefile.ssl >> $(TOP)/MINFO
+
+links:
+	/bin/rm -f Makefile
+	$(TOP)/util/point.sh Makefile.ssl Makefile ;
+	$(TOP)/util/mklink.sh ../../include $(EXHEADER)
+	$(TOP)/util/mklink.sh ../../test $(TEST)
+	$(TOP)/util/mklink.sh ../../apps $(APPS)
+
+install:
+	@for i in $(EXHEADER) ; \
+	do  \
+	(cp $$i $(INSTALLTOP)/include/$$i; \
+	chmod 644 $(INSTALLTOP)/include/$$i ); \
+	done;
+
+tags:
+	ctags $(SRC)
+
+tests:
+
+lint:
+	lint -DLINT $(INCLUDES) $(SRC)>fluff
+
+depend:
+	$(MAKEDEPEND) $(INCLUDES) $(PROGS) $(LIBSRC)
+
+dclean:
+	perl -pe 'if (/^# DO NOT DELETE THIS LINE/) {print; exit(0);}' $(MAKEFILE) >Makefile.new
+	mv -f Makefile.new $(MAKEFILE)
+
+clean:
+	/bin/rm -f *.o */*.o *.obj lib tags core .pure .nfs* *.old *.bak fluff
+
+errors:
+	perl $(TOP)/util/err-ins.pl $(ERR).err $(ERR).h
+	perl ../err/err_genc.pl $(ERR).h $(ERRC).c
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
diff --git a/crypto/dh/dh.err b/crypto/dh/dh.err
new file mode 100644
index 0000000000..a4fe746985
--- /dev/null
+++ b/crypto/dh/dh.err
@@ -0,0 +1,12 @@
+/* Error codes for the DH functions. */
+
+/* Function codes. */
+#define DH_F_DHPARAMS_PRINT				 100
+#define DH_F_DHPARAMS_PRINT_FP				 101
+#define DH_F_DH_COMPUTE_KEY				 102
+#define DH_F_DH_GENERATE_KEY				 103
+#define DH_F_DH_GENERATE_PARAMETERS			 104
+#define DH_F_DH_NEW					 105
+
+/* Reason codes. */
+#define DH_R_NO_PRIVATE_VALUE				 100
diff --git a/crypto/dh/dh.h b/crypto/dh/dh.h
new file mode 100644
index 0000000000..44978028b7
--- /dev/null
+++ b/crypto/dh/dh.h
@@ -0,0 +1,162 @@
+/* crypto/dh/dh.h */
+/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * 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 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 acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#ifndef HEADER_DH_H
+#define HEADER_DH_H
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#ifndef HEADER_BN_H
+#define BIGNUM 		char
+#endif
+
+typedef struct dh_st
+	{
+	/* This first argument is used to pick up errors when
+	 * a DH is passed instead of a EVP_PKEY */
+	int pad;
+	int version;
+	BIGNUM *p;
+	BIGNUM *g;
+	int length; /* optional */
+	BIGNUM *pub_key;	/* y */
+	BIGNUM *priv_key;	/* x */
+	} DH;
+
+#define DH_GENERATOR_2		2
+/* #define DH_GENERATOR_3	3 */
+#define DH_GENERATOR_5		5
+
+/* DH_check error codes */
+#define DH_CHECK_P_NOT_PRIME		0x01
+#define DH_CHECK_P_NOT_STRONG_PRIME	0x02
+#define DH_UNABLE_TO_CHECK_GENERATOR	0x04
+#define DH_NOT_SUITABLE_GENERATOR	0x08
+
+#define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \
+		(char *(*)())d2i_DHparams,(char *)(x))
+#define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
+		(char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
+#define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
+		(unsigned char *)(x))
+#define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \
+		(char *(*)())d2i_DHparams,(bp),(unsigned char **)(x))
+#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \
+		(unsigned char *)(x))
+
+#ifndef NOPROTO
+DH *	DH_new(void);
+void	DH_free(DH *dh);
+int	DH_size(DH *dh);
+DH *	DH_generate_parameters(int prime_len,int generator,
+		void (*callback)(int,int));
+int	DH_check(DH *dh,int *codes);
+int	DH_generate_key(DH *dh);
+int	DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh);
+DH *	d2i_DHparams(DH **a,unsigned char **pp, long length);
+int	i2d_DHparams(DH *a,unsigned char **pp);
+#ifndef WIN16
+int	DHparams_print_fp(FILE *fp, DH *x);
+#endif
+#ifdef HEADER_BIO_H
+int	DHparams_print(BIO *bp, DH *x);
+#else
+int	DHparams_print(char *bp, DH *x);
+#endif
+void	ERR_load_DH_strings(void );
+
+#else
+
+DH *	DH_new();
+void	DH_free();
+int	DH_size();
+DH *	DH_generate_parameters();
+int	DH_check();
+int	DH_generate_key();
+int	DH_compute_key();
+DH *	d2i_DHparams();
+int	i2d_DHparams();
+#ifndef WIN16
+int	DHparams_print_fp();
+#endif
+int	DHparams_print();
+void	ERR_load_DH_strings();
+
+#endif
+
+/* BEGIN ERROR CODES */
+/* Error codes for the DH functions. */
+
+/* Function codes. */
+#define DH_F_DHPARAMS_PRINT				 100
+#define DH_F_DHPARAMS_PRINT_FP				 101
+#define DH_F_DH_COMPUTE_KEY				 102
+#define DH_F_DH_GENERATE_KEY				 103
+#define DH_F_DH_GENERATE_PARAMETERS			 104
+#define DH_F_DH_NEW					 105
+
+/* Reason codes. */
+#define DH_R_NO_PRIVATE_VALUE				 100
+ 
+#ifdef  __cplusplus
+}
+#endif
+#endif
+
diff --git a/crypto/dh/dh1024.pem b/crypto/dh/dh1024.pem
new file mode 100644
index 0000000000..81d43f6a3e
--- /dev/null
+++ b/crypto/dh/dh1024.pem
@@ -0,0 +1,5 @@
+-----BEGIN DH PARAMETERS-----
+MIGHAoGBAJf2QmHKtQXdKCjhPx1ottPb0PMTBH9A6FbaWMsTuKG/K3g6TG1Z1fkq
+/Gz/PWk/eLI9TzFgqVAuPvr3q14a1aZeVUMTgo2oO5/y2UHe6VaJ+trqCTat3xlx
+/mNbIK9HA2RgPC3gWfVLZQrY+gz3ASHHR5nXWHEyvpuZm7m3h+irAgEC
+-----END DH PARAMETERS-----
diff --git a/crypto/dh/dh192.pem b/crypto/dh/dh192.pem
new file mode 100644
index 0000000000..521c07271d
--- /dev/null
+++ b/crypto/dh/dh192.pem
@@ -0,0 +1,3 @@
+-----BEGIN DH PARAMETERS-----
+MB4CGQDUoLoCULb9LsYm5+/WN992xxbiLQlEuIsCAQM=
+-----END DH PARAMETERS-----
diff --git a/crypto/dh/dh2048.pem b/crypto/dh/dh2048.pem
new file mode 100644
index 0000000000..295460f508
--- /dev/null
+++ b/crypto/dh/dh2048.pem
@@ -0,0 +1,16 @@
+-----BEGIN DH PARAMETERS-----
+MIIBCAKCAQEA7ZKJNYJFVcs7+6J2WmkEYb8h86tT0s0h2v94GRFS8Q7B4lW9aG9o
+AFO5Imov5Jo0H2XMWTKKvbHbSe3fpxJmw/0hBHAY8H/W91hRGXKCeyKpNBgdL8sh
+z22SrkO2qCnHJ6PLAMXy5fsKpFmFor2tRfCzrfnggTXu2YOzzK7q62bmqVdmufEo
+pT8igNcLpvZxk5uBDvhakObMym9mX3rAEBoe8PwttggMYiiw7NuJKO4MqD1llGkW
+aVM8U2ATsCun1IKHrRxynkE1/MJ86VHeYYX8GZt2YA8z+GuzylIOKcMH6JAWzMwA
+Gbatw6QwizOhr9iMjZ0B26TE3X8LvW84wwIBAg==
+-----END DH PARAMETERS-----
+-----BEGIN DH PARAMETERS-----
+MIIBCAKCAQEArtA3w73zP6Lu3EOQtwogiXt3AXXpuS6yD4BhzNS1pZFyPHk0/an5
+8ydEkPhQZHKDW+BZJxxPLANaTudWo2YT8TgtvUdN6KSgMiEi6McwqDw+SADuvW+F
+SKUYFxG6VFIxyEP6xBdf+vhJxEDbRG2EYsHDRRtJ76gp9cSKTHusf2R+4AAVGqnt
+gRAbNqtcOar/7FSj+Pl8G3v0Bty0LcCSpbqgYlnv6z+rErQmmC6PPvSz97TDMCok
+yKpCE9hFA1zkqK3TH4FmFvGeIaXJUIBZf4mArWuBTjWFW3nmhESRUn1VK3K3x42N
+a5k6c2+EhrMFiLjxuH6JZoqL0/E93FF9SwIBAg==
+-----END DH PARAMETERS-----
diff --git a/crypto/dh/dh4096.pem b/crypto/dh/dh4096.pem
new file mode 100644
index 0000000000..390943a21d
--- /dev/null
+++ b/crypto/dh/dh4096.pem
@@ -0,0 +1,14 @@
+-----BEGIN DH PARAMETERS-----
+MIICCAKCAgEA/urRnb6vkPYc/KEGXWnbCIOaKitq7ySIq9dTH7s+Ri59zs77zty7
+vfVlSe6VFTBWgYjD2XKUFmtqq6CqXMhVX5ElUDoYDpAyTH85xqNFLzFC7nKrff/H
+TFKNttp22cZE9V0IPpzedPfnQkE7aUdmF9JnDyv21Z/818O93u1B4r0szdnmEvEF
+bKuIxEHX+bp0ZR7RqE1AeifXGJX3d6tsd2PMAObxwwsv55RGkn50vHO4QxtTARr1
+rRUV5j3B3oPMgC7Offxx+98Xn45B1/G0Prp11anDsR1PGwtaCYipqsvMwQUSJtyE
+EOQWk+yFkeMe4vWv367eEi0Sd/wnC+TSXBE3pYvpYerJ8n1MceI5GQTdarJ77OW9
+bGTHmxRsLSCM1jpLdPja5jjb4siAa6EHc4qN9c/iFKS3PQPJEnX7pXKBRs5f7AF3
+W3RIGt+G9IVNZfXaS7Z/iCpgzgvKCs0VeqN38QsJGtC1aIkwOeyjPNy2G6jJ4yqH
+ovXYt/0mc00vCWeSNS1wren0pR2EiLxX0ypjjgsU1mk/Z3b/+zVf7fZSIB+nDLjb
+NPtUlJCVGnAeBK1J1nG3TQicqowOXoM6ISkdaXj5GPJdXHab2+S7cqhKGv5qC7rR
+jT6sx7RUr0CNTxzLI7muV2/a4tGmj0PSdXQdsZ7tw7gbXlaWT1+MM2MCAQI=
+-----END DH PARAMETERS-----
+
diff --git a/crypto/dh/dh512.pem b/crypto/dh/dh512.pem
new file mode 100644
index 0000000000..0a4d863ebe
--- /dev/null
+++ b/crypto/dh/dh512.pem
@@ -0,0 +1,4 @@
+-----BEGIN DH PARAMETERS-----
+MEYCQQDaWDwW2YUiidDkr3VvTMqS3UvlM7gE+w/tlO+cikQD7VdGUNNpmdsp13Yn
+a6LT1BLiGPTdHghM9tgAPnxHdOgzAgEC
+-----END DH PARAMETERS-----
diff --git a/crypto/dh/dh_check.c b/crypto/dh/dh_check.c
new file mode 100644
index 0000000000..8da8dc8393
--- /dev/null
+++ b/crypto/dh/dh_check.c
@@ -0,0 +1,120 @@
+/* crypto/dh/dh_check.c */
+/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * 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 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 acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include "bn.h"
+#include "dh.h"
+
+/* Check that p is a strong prime and
+ * if g is 2, 3 or 5, check that is is a suitable generator
+ * where
+ * for 2, p mod 24 == 11
+ * for 3, p mod 12 == 5
+ * for 5, p mod 10 == 3 or 7
+ * should hold.
+ */
+
+int DH_check(dh,ret)
+DH *dh;
+int *ret;
+	{
+	int ok=0;
+	BN_CTX *ctx=NULL;
+	BN_ULONG l;
+	BIGNUM *q=NULL;
+
+	*ret=0;
+	ctx=BN_CTX_new();
+	if (ctx == NULL) goto err;
+	q=BN_new();
+	if (q == NULL) goto err;
+
+	if (BN_is_word(dh->g,DH_GENERATOR_2))
+		{
+		l=BN_mod_word(dh->p,24);
+		if (l != 11) *ret|=DH_NOT_SUITABLE_GENERATOR;
+		}
+/*	else if (BN_is_word(dh->g,DH_GENERATOR_3))
+		{
+		l=BN_mod_word(dh->p,12);
+		if (l != 5) *ret|=DH_NOT_SUITABLE_GENERATOR;
+		}*/
+	else if (BN_is_word(dh->g,DH_GENERATOR_5))
+		{
+		l=BN_mod_word(dh->p,10);
+		if ((l != 3) && (l != 7))
+			*ret|=DH_NOT_SUITABLE_GENERATOR;
+		}
+	else
+		*ret|=DH_UNABLE_TO_CHECK_GENERATOR;
+
+	if (!BN_is_prime(dh->p,BN_prime_checks,NULL,ctx))
+		*ret|=DH_CHECK_P_NOT_PRIME;
+	else
+		{
+		if (!BN_rshift1(q,dh->p)) goto err;
+		if (!BN_is_prime(q,BN_prime_checks,NULL,ctx))
+			*ret|=DH_CHECK_P_NOT_STRONG_PRIME;
+		}
+	ok=1;
+err:
+	if (ctx != NULL) BN_CTX_free(ctx);
+	if (q != NULL) BN_free(q);
+	return(ok);
+	}
diff --git a/crypto/dh/dh_err.c b/crypto/dh/dh_err.c
new file mode 100644
index 0000000000..1950f43f62
--- /dev/null
+++ b/crypto/dh/dh_err.c
@@ -0,0 +1,90 @@
+/* lib/dh/dh_err.c */
+/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * 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 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 acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+#include <stdio.h>
+#include "err.h"
+#include "dh.h"
+
+/* BEGIN ERROR CODES */
+static ERR_STRING_DATA DH_str_functs[]=
+	{
+{ERR_PACK(0,DH_F_DHPARAMS_PRINT,0),	"DHparams_print"},
+{ERR_PACK(0,DH_F_DHPARAMS_PRINT_FP,0),	"DHparams_print_fp"},
+{ERR_PACK(0,DH_F_DH_COMPUTE_KEY,0),	"DH_compute_key"},
+{ERR_PACK(0,DH_F_DH_GENERATE_KEY,0),	"DH_generate_key"},
+{ERR_PACK(0,DH_F_DH_GENERATE_PARAMETERS,0),	"DH_generate_parameters"},
+{ERR_PACK(0,DH_F_DH_NEW,0),	"DH_new"},
+{0,NULL},
+	};
+
+static ERR_STRING_DATA DH_str_reasons[]=
+	{
+{DH_R_NO_PRIVATE_VALUE                   ,"no private value"},
+{0,NULL},
+	};
+
+void ERR_load_DH_strings()
+	{
+	static int init=1;
+
+	if (init)
+		{
+		init=0;
+		ERR_load_strings(ERR_LIB_DH,DH_str_functs);
+		ERR_load_strings(ERR_LIB_DH,DH_str_reasons);
+		}
+	}
diff --git a/crypto/dh/dh_gen.c b/crypto/dh/dh_gen.c
new file mode 100644
index 0000000000..ff4f18e1e0
--- /dev/null
+++ b/crypto/dh/dh_gen.c
@@ -0,0 +1,149 @@
+/* crypto/dh/dh_gen.c */
+/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * 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 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 acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include "bn.h"
+#include "dh.h"
+
+/* We generate DH parameters as follows
+ * find a prime q which is prime_len/2 bits long.
+ * p=(2*q)+1 or (p-1)/2 = q
+ * For this case, g is a generator if
+ * g^((p-1)/q) mod p != 1 for values of q which are the factors of p-1.
+ * Since the factors of p-1 are q and 2, we just need to check
+ * g^2 mod p != 1 and g^q mod p != 1.
+ *
+ * Having said all that,
+ * there is another special case method for the generators 2, 3 and 5.
+ * for 2, p mod 24 == 11
+ * for 3, p mod 12 == 5  <<<<< does not work for strong primes.
+ * for 5, p mod 10 == 3 or 7
+ *
+ * Thanks to Phil Karn <karn@qualcomm.com> for the pointers about the
+ * special generators and for answering some of my questions.
+ *
+ * I've implemented the second simple method :-).
+ * Since DH should be using a strong prime (both p and q are prime),
+ * this generator function can take a very very long time to run.
+ */
+
+DH *DH_generate_parameters(prime_len,generator,callback)
+int prime_len;
+int generator;
+void (*callback)(P_I_I);
+	{
+	BIGNUM *p=NULL,*t1,*t2;
+	DH *ret=NULL;
+	int g,ok= -1;
+	BN_CTX *ctx=NULL;
+
+	ret=DH_new();
+	ctx=BN_CTX_new();
+	if (ctx == NULL) goto err;
+	t1=ctx->bn[0];
+	t2=ctx->bn[1];
+	ctx->tos=2;
+	
+	if (generator == DH_GENERATOR_2)
+		{
+		BN_set_word(t1,24);
+		BN_set_word(t2,11);
+		g=2;
+		}
+#ifdef undef  /* does not work for strong primes */
+	else if (generator == DH_GENERATOR_3)
+		{
+		BN_set_word(t1,12);
+		BN_set_word(t2,5);
+		g=3;
+		}
+#endif
+	else if (generator == DH_GENERATOR_5)
+		{
+		BN_set_word(t1,10);
+		BN_set_word(t2,3);
+		/* BN_set_word(t3,7); just have to miss
+		 * out on these ones :-( */
+		g=5;
+		}
+	else
+		g=generator;
+	
+	p=BN_generate_prime(prime_len,1,t1,t2,callback);
+	if (p == NULL) goto err;
+	if (callback != NULL) callback(3,0);
+	ret->p=p;
+	ret->g=BN_new();
+	if (!BN_set_word(ret->g,g)) goto err;
+	ok=1;
+err:
+	if (ok == -1)
+		{
+		DHerr(DH_F_DH_GENERATE_PARAMETERS,ERR_R_BN_LIB);
+		ok=0;
+		}
+
+	if (ctx != NULL) BN_CTX_free(ctx);
+	if (!ok && (ret != NULL))
+		{
+		DH_free(ret);
+		ret=NULL;
+		}
+	return(ret);
+	}
diff --git a/crypto/dh/dh_key.c b/crypto/dh/dh_key.c
new file mode 100644
index 0000000000..12f47c4574
--- /dev/null
+++ b/crypto/dh/dh_key.c
@@ -0,0 +1,142 @@
+/* crypto/dh/dh_key.c */
+/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * 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 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 acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include "bn.h"
+#include "rand.h"
+#include "dh.h"
+
+int DH_generate_key(dh)
+DH *dh;
+	{
+	int ok=0;
+	unsigned int i;
+	BN_CTX *ctx=NULL;
+	BIGNUM *pub_key=NULL,*priv_key=NULL;
+
+	ctx=BN_CTX_new();
+	if (ctx == NULL) goto err;
+
+	if (dh->priv_key == NULL)
+		{
+		i=dh->length;
+		if (i == 0)
+			{
+			/* Make the number p-1 bits long */
+			i=BN_num_bits(dh->p)-1;
+			}
+		priv_key=BN_new();
+		if (priv_key == NULL) goto err;
+		if (!BN_rand(priv_key,i,0,0)) goto err;
+		}
+	else
+		priv_key=dh->priv_key;
+
+	if (dh->pub_key == NULL)
+		{
+		pub_key=BN_new();
+		if (pub_key == NULL) goto err;
+		}
+	else
+		pub_key=dh->pub_key;
+
+	if (!BN_mod_exp(pub_key,dh->g,priv_key,dh->p,ctx)) goto err;
+		
+	dh->pub_key=pub_key;
+	dh->priv_key=priv_key;
+	ok=1;
+err:
+	if (ok != 1)
+		DHerr(DH_F_DH_GENERATE_KEY,ERR_R_BN_LIB);
+
+	if ((pub_key != NULL)  && (dh->pub_key == NULL))  BN_free(pub_key);
+	if ((priv_key != NULL) && (dh->priv_key == NULL)) BN_free(priv_key);
+	if (ctx != NULL) BN_CTX_free(ctx);
+	return(ok);
+	}
+
+int DH_compute_key(key,pub_key,dh)
+unsigned char *key;
+BIGNUM *pub_key;
+DH *dh;
+	{
+	BN_CTX *ctx;
+	BIGNUM *tmp;
+	int ret= -1;
+
+	ctx=BN_CTX_new();
+	if (ctx == NULL) goto err;
+	tmp=ctx->bn[ctx->tos++];
+	
+	if (dh->priv_key == NULL)
+		{
+		DHerr(DH_F_DH_COMPUTE_KEY,DH_R_NO_PRIVATE_VALUE);
+		goto err;
+		}
+	if (!BN_mod_exp(tmp,pub_key,dh->priv_key,dh->p,ctx))
+		{
+		DHerr(DH_F_DH_COMPUTE_KEY,ERR_R_BN_LIB);
+		goto err;
+		}
+
+	ret=BN_bn2bin(tmp,key);
+err:
+	if (ctx != NULL) BN_CTX_free(ctx);
+	return(ret);
+	}
diff --git a/crypto/dh/dh_lib.c b/crypto/dh/dh_lib.c
new file mode 100644
index 0000000000..786a2c14b4
--- /dev/null
+++ b/