Small Issues & Maintenance

-=-=-=-=-=-=-=-=-=-=-=-=-=

-Begin work on Navigation Meshes (simple pathfinding for now, will improve soon)
-More doc on theme overriding
-Upgraded OpenSSL to version without bugs
-Misc bugfixes

1 files changed, 184 insertions, 0 deletions

diff --git a/drivers/builtin_openssl2/crypto/bn/bn_kron.c b/drivers/builtin_openssl2/crypto/bn/bn_kron.c
new file mode 100644
index 0000000000..740359b752
--- /dev/null
+++ b/drivers/builtin_openssl2/crypto/bn/bn_kron.c
@@ -0,0 +1,184 @@
+/* crypto/bn/bn_kron.c */
+/* ====================================================================
+ * Copyright (c) 1998-2000 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 "cryptlib.h"
+#include "bn_lcl.h"
+
+/* least significant word */
+#define BN_lsw(n) (((n)->top == 0) ? (BN_ULONG) 0 : (n)->d[0])
+
+/* Returns -2 for errors because both -1 and 0 are valid results. */
+int BN_kronecker(const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+	{
+	int i;
+	int ret = -2; /* avoid 'uninitialized' warning */
+	int err = 0;
+	BIGNUM *A, *B, *tmp;
+	/* In 'tab', only odd-indexed entries are relevant:
+	 * For any odd BIGNUM n,
+	 *     tab[BN_lsw(n) & 7]
+	 * is $(-1)^{(n^2-1)/8}$ (using TeX notation).
+	 * Note that the sign of n does not matter.
+	 */
+	static const int tab[8] = {0, 1, 0, -1, 0, -1, 0, 1};
+
+	bn_check_top(a);
+	bn_check_top(b);
+
+	BN_CTX_start(ctx);
+	A = BN_CTX_get(ctx);
+	B = BN_CTX_get(ctx);
+	if (B == NULL) goto end;
+	
+	err = !BN_copy(A, a);
+	if (err) goto end;
+	err = !BN_copy(B, b);
+	if (err) goto end;
+
+	/*
+	 * Kronecker symbol, imlemented according to Henri Cohen,
+	 * "A Course in Computational Algebraic Number Theory"
+	 * (algorithm 1.4.10).
+	 */
+
+	/* Cohen's step 1: */
+
+	if (BN_is_zero(B))
+		{
+		ret = BN_abs_is_word(A, 1);
+		goto end;
+ 		}
+	
+	/* Cohen's step 2: */
+
+	if (!BN_is_odd(A) && !BN_is_odd(B))
+		{
+		ret = 0;
+		goto end;
+		}
+
+	/* now  B  is non-zero */
+	i = 0;
+	while (!BN_is_bit_set(B, i))
+		i++;
+	err = !BN_rshift(B, B, i);
+	if (err) goto end;
+	if (i & 1)
+		{
+		/* i is odd */
+		/* (thus  B  was even, thus  A  must be odd!)  */
+
+		/* set 'ret' to $(-1)^{(A^2-1)/8}$ */
+		ret = tab[BN_lsw(A) & 7];
+		}
+	else
+		{
+		/* i is even */
+		ret = 1;
+		}
+	
+	if (B->neg)
+		{
+		B->neg = 0;
+		if (A->neg)
+			ret = -ret;
+		}
+
+	/* now  B  is positive and odd, so what remains to be done is
+	 * to compute the Jacobi symbol  (A/B)  and multiply it by 'ret' */
+
+	while (1)
+		{
+		/* Cohen's step 3: */
+
+		/*  B  is positive and odd */
+
+		if (BN_is_zero(A))
+			{
+			ret = BN_is_one(B) ? ret : 0;
+			goto end;
+			}
+
+		/* now  A  is non-zero */
+		i = 0;
+		while (!BN_is_bit_set(A, i))
+			i++;
+		err = !BN_rshift(A, A, i);
+		if (err) goto end;
+		if (i & 1)
+			{
+			/* i is odd */
+			/* multiply 'ret' by  $(-1)^{(B^2-1)/8}$ */
+			ret = ret * tab[BN_lsw(B) & 7];
+			}
+	
+		/* Cohen's step 4: */
+		/* multiply 'ret' by  $(-1)^{(A-1)(B-1)/4}$ */
+		if ((A->neg ? ~BN_lsw(A) : BN_lsw(A)) & BN_lsw(B) & 2)
+			ret = -ret;
+		
+		/* (A, B) := (B mod |A|, |A|) */
+		err = !BN_nnmod(B, B, A, ctx);
+		if (err) goto end;
+		tmp = A; A = B; B = tmp;
+		tmp->neg = 0;
+		}
+end:
+	BN_CTX_end(ctx);
+	if (err)
+		return -2;
+	else
+		return ret;
+	}