Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/ecdsa/ecs_ossl.c

Index: openssl/crypto/ecdsa/ecs_ossl.c
diff --git a/openssl/crypto/ecdsa/ecs_ossl.c b/openssl/crypto/ecdsa/ecs_ossl.c
deleted file mode 100644
index 7725935610ed2e7fb149f97532cb9704e07d9b8d..0000000000000000000000000000000000000000
--- a/openssl/crypto/ecdsa/ecs_ossl.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/* crypto/ecdsa/ecs_ossl.c */
-/*
- * Written by Nils Larsch for the OpenSSL project
- */
-/* ====================================================================
- * Copyright (c) 1998-2004 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 "ecs_locl.h"
-#include <openssl/err.h>
-#include <openssl/obj_mac.h>
-#include <openssl/bn.h>
-
-static ECDSA_SIG *ecdsa_do_sign(const unsigned char *dgst, int dlen, 
-		const BIGNUM *, const BIGNUM *, EC_KEY *eckey);
-static int ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, 
-		BIGNUM **rp);
-static int ecdsa_do_verify(const unsigned char *dgst, int dgst_len, 
-		const ECDSA_SIG *sig, EC_KEY *eckey);
-
-static ECDSA_METHOD openssl_ecdsa_meth = {
-	"OpenSSL ECDSA method",
-	ecdsa_do_sign,
-	ecdsa_sign_setup,
-	ecdsa_do_verify,
-#if 0
-	NULL, /* init     */
-	NULL, /* finish   */
-#endif
-	0,    /* flags    */
-	NULL  /* app_data */
-};
-
-const ECDSA_METHOD *ECDSA_OpenSSL(void)
-{
-	return &openssl_ecdsa_meth;
-}
-
-static int ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
-		BIGNUM **rp)
-{
-	BN_CTX   *ctx = NULL;
-	BIGNUM	 *k = NULL, *r = NULL, *order = NULL, *X = NULL;
-	EC_POINT *tmp_point=NULL;
-	const EC_GROUP *group;
-	int 	 ret = 0;
-
-	if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_PASSED_NULL_PARAMETER);
-		return 0;
-	}
-
-	if (ctx_in == NULL) 
-	{
-		if ((ctx = BN_CTX_new()) == NULL)
-		{
-			ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_MALLOC_FAILURE);
-			return 0;
-		}
-	}
-	else
-		ctx = ctx_in;
-
-	k     = BN_new();	/* this value is later returned in *kinvp */
-	r     = BN_new();	/* this value is later returned in *rp    */
-	order = BN_new();
-	X     = BN_new();
-	if (!k || !r || !order || !X)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_MALLOC_FAILURE);
-		goto err;
-	}
-	if ((tmp_point = EC_POINT_new(group)) == NULL)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
-		goto err;
-	}
-	if (!EC_GROUP_get_order(group, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
-		goto err;
-	}
-	
-	do
-	{
-		/* get random k */	
-		do
-			if (!BN_rand_range(k, order))
-			{
-				ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,
-				 ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED);	
-				goto err;
-			}
-		while (BN_is_zero(k));
-
-		/* We do not want timing information to leak the length of k,
-		 * so we compute G*k using an equivalent scalar of fixed
-		 * bit-length. */
-
-		if (!BN_add(k, k, order)) goto err;
-		if (BN_num_bits(k) <= BN_num_bits(order))
-			if (!BN_add(k, k, order)) goto err;
-
-		/* compute r the x-coordinate of generator * k */
-		if (!EC_POINT_mul(group, tmp_point, k, NULL, NULL, ctx))
-		{
-			ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
-			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_point, X, NULL, ctx))
-			{
-				ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_EC_LIB);
-				goto err;
-			}
-		}
-#ifndef OPENSSL_NO_EC2M
-		else /* NID_X9_62_characteristic_two_field */
-		{
-			if (!EC_POINT_get_affine_coordinates_GF2m(group,
-				tmp_point, X, NULL, ctx))
-			{
-				ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_EC_LIB);
-				goto err;
-			}
-		}
-#endif
-		if (!BN_nnmod(r, X, order, ctx))
-		{
-			ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
-			goto err;
-		}
-	}
-	while (BN_is_zero(r));
-
-	/* compute the inverse of k */
-	if (!BN_mod_inverse(k, k, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
-		goto err;	
-	}
-	/* clear old values if necessary */
-	if (*rp != NULL)
-		BN_clear_free(*rp);
-	if (*kinvp != NULL) 
-		BN_clear_free(*kinvp);
-	/* save the pre-computed values  */
-	*rp    = r;
-	*kinvp = k;
-	ret = 1;
-err:
-	if (!ret)
-	{
-		if (k != NULL) BN_clear_free(k);
-		if (r != NULL) BN_clear_free(r);
-	}
-	if (ctx_in == NULL) 
-		BN_CTX_free(ctx);
-	if (order != NULL)
-		BN_free(order);
-	if (tmp_point != NULL) 
-		EC_POINT_free(tmp_point);
-	if (X)
-		BN_clear_free(X);
-	return(ret);
-}
-
-
-static ECDSA_SIG *ecdsa_do_sign(const unsigned char *dgst, int dgst_len, 
-		const BIGNUM *in_kinv, const BIGNUM *in_r, EC_KEY *eckey)
-{
-	int     ok = 0, i;
-	BIGNUM *kinv=NULL, *s, *m=NULL,*tmp=NULL,*order=NULL;
-	const BIGNUM *ckinv;
-	BN_CTX     *ctx = NULL;
-	const EC_GROUP   *group;
-	ECDSA_SIG  *ret;
-	ECDSA_DATA *ecdsa;
-	const BIGNUM *priv_key;
-
-	ecdsa    = ecdsa_check(eckey);
-	group    = EC_KEY_get0_group(eckey);
-	priv_key = EC_KEY_get0_private_key(eckey);
-	
-	if (group == NULL || priv_key == NULL || ecdsa == NULL)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_PASSED_NULL_PARAMETER);
-		return NULL;
-	}
-
-	ret = ECDSA_SIG_new();
-	if (!ret)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
-		return NULL;
-	}
-	s = ret->s;
-
-	if ((ctx = BN_CTX_new()) == NULL || (order = BN_new()) == NULL ||
-		(tmp = BN_new()) == NULL || (m = BN_new()) == NULL)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
-		goto err;
-	}
-
-	if (!EC_GROUP_get_order(group, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_EC_LIB);
-		goto err;
-	}
-	i = BN_num_bits(order);
-	/* Need to truncate digest if it is too long: first truncate whole
-	 * bytes.
-	 */
-	if (8 * dgst_len > i)
-		dgst_len = (i + 7)/8;
-	if (!BN_bin2bn(dgst, dgst_len, m))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
-		goto err;
-	}
-	/* If still too long truncate remaining bits with a shift */
-	if ((8 * dgst_len > i) && !BN_rshift(m, m, 8 - (i & 0x7)))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
-		goto err;
-	}
-	do
-	{
-		if (in_kinv == NULL || in_r == NULL)
-		{
-			if (!ECDSA_sign_setup(eckey, ctx, &kinv, &ret->r))
-			{
-				ECDSAerr(ECDSA_F_ECDSA_DO_SIGN,ERR_R_ECDSA_LIB);
-				goto err;
-			}
-			ckinv = kinv;
-		}
-		else
-		{
-			ckinv  = in_kinv;
-			if (BN_copy(ret->r, in_r) == NULL)
-			{
-				ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
-				goto err;
-			}
-		}
-
-		if (!BN_mod_mul(tmp, priv_key, ret->r, order, ctx))
-		{
-			ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
-			goto err;
-		}
-		if (!BN_mod_add_quick(s, tmp, m, order))
-		{
-			ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
-			goto err;
-		}
-		if (!BN_mod_mul(s, s, ckinv, order, ctx))
-		{
-			ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
-			goto err;
-		}
-		if (BN_is_zero(s))
-		{
-			/* if kinv and r have been supplied by the caller
-			 * don't to generate new kinv and r values */
-			if (in_kinv != NULL && in_r != NULL)
-			{
-				ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ECDSA_R_NEED_NEW_SETUP_VALUES);
-				goto err;
-			}
-		}
-		else
-			/* s != 0 => we have a valid signature */
-			break;
-	}
-	while (1);
-
-	ok = 1;
-err:
-	if (!ok)
-	{
-		ECDSA_SIG_free(ret);
-		ret = NULL;
-	}
-	if (ctx)
-		BN_CTX_free(ctx);
-	if (m)
-		BN_clear_free(m);
-	if (tmp)
-		BN_clear_free(tmp);
-	if (order)
-		BN_free(order);
-	if (kinv)
-		BN_clear_free(kinv);
-	return ret;
-}
-
-static int ecdsa_do_verify(const unsigned char *dgst, int dgst_len,
-		const ECDSA_SIG *sig, EC_KEY *eckey)
-{
-	int ret = -1, i;
-	BN_CTX   *ctx;
-	BIGNUM   *order, *u1, *u2, *m, *X;
-	EC_POINT *point = NULL;
-	const EC_GROUP *group;
-	const EC_POINT *pub_key;
-
-	/* check input values */
-	if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL ||
-	    (pub_key = EC_KEY_get0_public_key(eckey)) == NULL || sig == NULL)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_MISSING_PARAMETERS);
-		return -1;
-	}
-
-	ctx = BN_CTX_new();
-	if (!ctx)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_MALLOC_FAILURE);
-		return -1;
-	}
-	BN_CTX_start(ctx);
-	order = BN_CTX_get(ctx);	
-	u1    = BN_CTX_get(ctx);
-	u2    = BN_CTX_get(ctx);
-	m     = BN_CTX_get(ctx);
-	X     = BN_CTX_get(ctx);
-	if (!X)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
-		goto err;
-	}
-	
-	if (!EC_GROUP_get_order(group, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
-		goto err;
-	}
-
-	if (BN_is_zero(sig->r)          || BN_is_negative(sig->r) || 
-	    BN_ucmp(sig->r, order) >= 0 || BN_is_zero(sig->s)  ||
-	    BN_is_negative(sig->s)      || BN_ucmp(sig->s, order) >= 0)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_BAD_SIGNATURE);
-		ret = 0;	/* signature is invalid */
-		goto err;
-	}
-	/* calculate tmp1 = inv(S) mod order */
-	if (!BN_mod_inverse(u2, sig->s, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
-		goto err;
-	}
-	/* digest -> m */
-	i = BN_num_bits(order);
-	/* Need to truncate digest if it is too long: first truncate whole
-	 * bytes.
-	 */
-	if (8 * dgst_len > i)
-		dgst_len = (i + 7)/8;
-	if (!BN_bin2bn(dgst, dgst_len, m))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
-		goto err;
-	}
-	/* If still too long truncate remaining bits with a shift */
-	if ((8 * dgst_len > i) && !BN_rshift(m, m, 8 - (i & 0x7)))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
-		goto err;
-	}
-	/* u1 = m * tmp mod order */
-	if (!BN_mod_mul(u1, m, u2, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
-		goto err;
-	}
-	/* u2 = r * w mod q */
-	if (!BN_mod_mul(u2, sig->r, u2, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
-		goto err;
-	}
-
-	if ((point = EC_POINT_new(group)) == NULL)
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_MALLOC_FAILURE);
-		goto err;
-	}
-	if (!EC_POINT_mul(group, point, u1, pub_key, u2, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
-		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,
-			point, X, NULL, ctx))
-		{
-			ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
-			goto err;
-		}
-	}
-#ifndef OPENSSL_NO_EC2M
-	else /* NID_X9_62_characteristic_two_field */
-	{
-		if (!EC_POINT_get_affine_coordinates_GF2m(group,
-			point, X, NULL, ctx))
-		{
-			ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
-			goto err;
-		}
-	}
-#endif	
-	if (!BN_nnmod(u1, X, order, ctx))
-	{
-		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
-		goto err;
-	}
-	/*  if the signature is correct u1 is equal to sig->r */
-	ret = (BN_ucmp(u1, sig->r) == 0);
-err:
-	BN_CTX_end(ctx);
-	BN_CTX_free(ctx);
-	if (point)
-		EC_POINT_free(point);
-	return ret;
-}