Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/dh/dh_key.c

Index: openssl/crypto/dh/dh_key.c
diff --git a/openssl/crypto/dh/dh_key.c b/openssl/crypto/dh/dh_key.c
deleted file mode 100644
index 89a74db4e691ba0ba953a5ea59e887a03ffda68f..0000000000000000000000000000000000000000
--- a/openssl/crypto/dh/dh_key.c
+++ /dev/null
@@ -1,292 +0,0 @@
-/* crypto/dh/dh_key.c */
-/* Copyright (C) 1995-1998 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 <openssl/bn.h>
-#include <openssl/rand.h>
-#include <openssl/dh.h>
-
-static int generate_key(DH *dh);
-static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
-static int dh_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_init(DH *dh);
-static int dh_finish(DH *dh);
-
-int DH_generate_key(DH *dh)
-	{
-#ifdef OPENSSL_FIPS
-	if (FIPS_mode() && !(dh->meth->flags & DH_FLAG_FIPS_METHOD)
-			&& !(dh->flags & DH_FLAG_NON_FIPS_ALLOW))
-		{
-		DHerr(DH_F_DH_GENERATE_KEY, DH_R_NON_FIPS_METHOD);
-		return 0;
-		}
-#endif
-	return dh->meth->generate_key(dh);
-	}
-
-int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
-	{
-#ifdef OPENSSL_FIPS
-	if (FIPS_mode() && !(dh->meth->flags & DH_FLAG_FIPS_METHOD)
-			&& !(dh->flags & DH_FLAG_NON_FIPS_ALLOW))
-		{
-		DHerr(DH_F_DH_COMPUTE_KEY, DH_R_NON_FIPS_METHOD);
-		return 0;
-		}
-#endif
-	return dh->meth->compute_key(key, pub_key, dh);
-	}
-
-static DH_METHOD dh_ossl = {
-"OpenSSL DH Method",
-generate_key,
-compute_key,
-dh_bn_mod_exp,
-dh_init,
-dh_finish,
-0,
-NULL,
-NULL
-};
-
-const DH_METHOD *DH_OpenSSL(void)
-{
-	return &dh_ossl;
-}
-
-static int generate_key(DH *dh)
-	{
-	int ok=0;
-	int generate_new_key=0;
-	unsigned l;
-	BN_CTX *ctx;
-	BN_MONT_CTX *mont=NULL;
-	BIGNUM *pub_key=NULL,*priv_key=NULL;
-
-	ctx = BN_CTX_new();
-	if (ctx == NULL) goto err;
-
-	if (dh->priv_key == NULL)
-		{
-		priv_key=BN_new();
-		if (priv_key == NULL) goto err;
-		generate_new_key=1;
-		}
-	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 (dh->flags & DH_FLAG_CACHE_MONT_P)
-		{
-		mont = BN_MONT_CTX_set_locked(&dh->method_mont_p,
-				CRYPTO_LOCK_DH, dh->p, ctx);
-		if (!mont)
-			goto err;
-		}
-
-	if (generate_new_key)
-		{
-		if (dh->q)
-			{
-			do
-				{
-				if (!BN_rand_range(priv_key, dh->q))
-					goto err;
-				}
-			while (BN_is_zero(priv_key) || BN_is_one(priv_key));
-			}
-		else
-			{
-			/* secret exponent length */
-			l = dh->length ? dh->length : BN_num_bits(dh->p)-1;
-			if (!BN_rand(priv_key, l, 0, 0)) goto err;
-			}
-		}
-
-	{
-		BIGNUM local_prk;
-		BIGNUM *prk;
-
-		if ((dh->flags & DH_FLAG_NO_EXP_CONSTTIME) == 0)
-			{
-			BN_init(&local_prk);
-			prk = &local_prk;
-			BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
-			}
-		else
-			prk = priv_key;
-
-		if (!dh->meth->bn_mod_exp(dh, pub_key, dh->g, prk, dh->p, ctx, mont)) goto err;
-	}
-		
-	dh->pub_key=pub_key;
-	dh->priv_key=priv_key;
-	ok=1;
-err:
-	if (ok != 1)
-		DHerr(DH_F_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);
-	BN_CTX_free(ctx);
-	return(ok);
-	}
-
-static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
-	{
-	BN_CTX *ctx=NULL;
-	BN_MONT_CTX *mont=NULL;
-	BIGNUM *tmp;
-	int ret= -1;
-        int check_result;
-
-	if (BN_num_bits(dh->p) > OPENSSL_DH_MAX_MODULUS_BITS)
-		{
-		DHerr(DH_F_COMPUTE_KEY,DH_R_MODULUS_TOO_LARGE);
-		goto err;
-		}
-
-	ctx = BN_CTX_new();
-	if (ctx == NULL) goto err;
-	BN_CTX_start(ctx);
-	tmp = BN_CTX_get(ctx);
-	
-	if (dh->priv_key == NULL)
-		{
-		DHerr(DH_F_COMPUTE_KEY,DH_R_NO_PRIVATE_VALUE);
-		goto err;
-		}
-
-	if (dh->flags & DH_FLAG_CACHE_MONT_P)
-		{
-		mont = BN_MONT_CTX_set_locked(&dh->method_mont_p,
-				CRYPTO_LOCK_DH, dh->p, ctx);
-		if ((dh->flags & DH_FLAG_NO_EXP_CONSTTIME) == 0)
-			{
-			/* XXX */
-			BN_set_flags(dh->priv_key, BN_FLG_CONSTTIME);
-			}
-		if (!mont)
-			goto err;
-		}
-
-        if (!DH_check_pub_key(dh, pub_key, &check_result) || check_result)
-		{
-		DHerr(DH_F_COMPUTE_KEY,DH_R_INVALID_PUBKEY);
-		goto err;
-		}
-
-	if (!dh->meth->bn_mod_exp(dh, tmp, pub_key, dh->priv_key,dh->p,ctx,mont))
-		{
-		DHerr(DH_F_COMPUTE_KEY,ERR_R_BN_LIB);
-		goto err;
-		}
-
-	ret=BN_bn2bin(tmp,key);
-err:
-	if (ctx != NULL)
-		{
-		BN_CTX_end(ctx);
-		BN_CTX_free(ctx);
-		}
-	return(ret);
-	}
-
-static int dh_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)
-	{
-	/* If a is only one word long and constant time is false, use the faster
-	 * exponenentiation function.
-	 */
-	if (a->top == 1 && ((dh->flags & DH_FLAG_NO_EXP_CONSTTIME) != 0))
-		{
-		BN_ULONG A = a->d[0];
-		return BN_mod_exp_mont_word(r,A,p,m,ctx,m_ctx);
-		}
-	else
-		return BN_mod_exp_mont(r,a,p,m,ctx,m_ctx);
-	}
-
-
-static int dh_init(DH *dh)
-	{
-	dh->flags |= DH_FLAG_CACHE_MONT_P;
-	return(1);
-	}
-
-static int dh_finish(DH *dh)
-	{
-	if(dh->method_mont_p)
-		BN_MONT_CTX_free(dh->method_mont_p);
-	return(1);
-	}