Initial import

1 files changed, 305 insertions, 0 deletions

diff --git a/openssl/crypto/bn/bn_rand.c b/openssl/crypto/bn/bn_rand.c
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+++ b/openssl/crypto/bn/bn_rand.c
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+/* crypto/bn/bn_rand.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.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2001 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
+ *    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 <stdio.h>
+#include <time.h>
+#include "cryptlib.h"
+#include "bn_lcl.h"
+#include <openssl/rand.h>
+
+static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom)
+	{
+	unsigned char *buf=NULL;
+	int ret=0,bit,bytes,mask;
+	time_t tim;
+
+	if (bits == 0)
+		{
+		BN_zero(rnd);
+		return 1;
+		}
+
+	bytes=(bits+7)/8;
+	bit=(bits-1)%8;
+	mask=0xff<<(bit+1);
+
+	buf=(unsigned char *)OPENSSL_malloc(bytes);
+	if (buf == NULL)
+		{
+		BNerr(BN_F_BNRAND,ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+
+	/* make a random number and set the top and bottom bits */
+	time(&tim);
+	RAND_add(&tim,sizeof(tim),0.0);
+
+	if (pseudorand)
+		{
+		if (RAND_pseudo_bytes(buf, bytes) == -1)
+			goto err;
+		}
+	else
+		{
+		if (RAND_bytes(buf, bytes) <= 0)
+			goto err;
+		}
+
+#if 1
+	if (pseudorand == 2)
+		{
+		/* generate patterns that are more likely to trigger BN
+		   library bugs */
+		int i;
+		unsigned char c;
+
+		for (i = 0; i < bytes; i++)
+			{
+			RAND_pseudo_bytes(&c, 1);
+			if (c >= 128 && i > 0)
+				buf[i] = buf[i-1];
+			else if (c < 42)
+				buf[i] = 0;
+			else if (c < 84)
+				buf[i] = 255;
+			}
+		}
+#endif
+
+	if (top != -1)
+		{
+		if (top)
+			{
+			if (bit == 0)
+				{
+				buf[0]=1;
+				buf[1]|=0x80;
+				}
+			else
+				{
+				buf[0]|=(3<<(bit-1));
+				}
+			}
+		else
+			{
+			buf[0]|=(1<<bit);
+			}
+		}
+	buf[0] &= ~mask;
+	if (bottom) /* set bottom bit if requested */
+		buf[bytes-1]|=1;
+	if (!BN_bin2bn(buf,bytes,rnd)) goto err;
+	ret=1;
+err:
+	if (buf != NULL)
+		{
+		OPENSSL_cleanse(buf,bytes);
+		OPENSSL_free(buf);
+		}
+	bn_check_top(rnd);
+	return(ret);
+	}
+
+int     BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
+	{
+	return bnrand(0, rnd, bits, top, bottom);
+	}
+
+int     BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom)
+	{
+	return bnrand(1, rnd, bits, top, bottom);
+	}
+
+#if 1
+int     BN_bntest_rand(BIGNUM *rnd, int bits, int top, int bottom)
+	{
+	return bnrand(2, rnd, bits, top, bottom);
+	}
+#endif
+
+
+/* random number r:  0 <= r < range */
+static int bn_rand_range(int pseudo, BIGNUM *r, const BIGNUM *range)
+	{
+	int (*bn_rand)(BIGNUM *, int, int, int) = pseudo ? BN_pseudo_rand : BN_rand;
+	int n;
+	int count = 100;
+
+	if (range->neg || BN_is_zero(range))
+		{
+		BNerr(BN_F_BN_RAND_RANGE, BN_R_INVALID_RANGE);
+		return 0;
+		}
+
+	n = BN_num_bits(range); /* n > 0 */
+
+	/* BN_is_bit_set(range, n - 1) always holds */
+
+	if (n == 1)
+		BN_zero(r);
+	else if (!BN_is_bit_set(range, n - 2) && !BN_is_bit_set(range, n - 3))
+		{
+		/* range = 100..._2,
+		 * so  3*range (= 11..._2)  is exactly one bit longer than  range */
+		do
+			{
+			if (!bn_rand(r, n + 1, -1, 0)) return 0;
+			/* If  r < 3*range,  use  r := r MOD range
+			 * (which is either  r, r - range,  or  r - 2*range).
+			 * Otherwise, iterate once more.
+			 * Since  3*range = 11..._2, each iteration succeeds with
+			 * probability >= .75. */
+			if (BN_cmp(r ,range) >= 0)
+				{
+				if (!BN_sub(r, r, range)) return 0;
+				if (BN_cmp(r, range) >= 0)
+					if (!BN_sub(r, r, range)) return 0;
+				}
+
+			if (!--count)
+				{
+				BNerr(BN_F_BN_RAND_RANGE, BN_R_TOO_MANY_ITERATIONS);
+				return 0;
+				}
+			
+			}
+		while (BN_cmp(r, range) >= 0);
+		}
+	else
+		{
+		do
+			{
+			/* range = 11..._2  or  range = 101..._2 */
+			if (!bn_rand(r, n, -1, 0)) return 0;
+
+			if (!--count)
+				{
+				BNerr(BN_F_BN_RAND_RANGE, BN_R_TOO_MANY_ITERATIONS);
+				return 0;
+				}
+			}
+		while (BN_cmp(r, range) >= 0);
+		}
+
+	bn_check_top(r);
+	return 1;
+	}
+
+
+int	BN_rand_range(BIGNUM *r, const BIGNUM *range)
+	{
+	return bn_rand_range(0, r, range);
+	}
+
+int	BN_pseudo_rand_range(BIGNUM *r, const BIGNUM *range)
+	{
+	return bn_rand_range(1, r, range);
+	}