added create_teenagent tool

svn-id: r43952

1 files changed, 261 insertions, 0 deletions

diff --git a/tools/create_teenagent/md5.cpp b/tools/create_teenagent/md5.cpp
new file mode 100644
index 0000000000..73ec80d9b0
--- /dev/null
+++ b/tools/create_teenagent/md5.cpp
@@ -0,0 +1,261 @@
+/* Scumm Tools
+ * Copyright (C) 2004-2006  The ScummVM Team
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "md5.h"
+
+#define GET_UINT32(n, b, i)	(n) = READ_LE_UINT32(b + i)
+#define PUT_UINT32(n, b, i)	WRITE_LE_UINT32(b + i, n)
+
+void md5_starts(md5_context *ctx) {
+	ctx->total[0] = 0;
+	ctx->total[1] = 0;
+
+	ctx->state[0] = 0x67452301;
+	ctx->state[1] = 0xEFCDAB89;
+	ctx->state[2] = 0x98BADCFE;
+	ctx->state[3] = 0x10325476;
+}
+
+static void md5_process(md5_context *ctx, const uint8 data[64]) {
+	uint32 X[16], A, B, C, D;
+
+	GET_UINT32(X[0],  data,  0);
+	GET_UINT32(X[1],  data,  4);
+	GET_UINT32(X[2],  data,  8);
+	GET_UINT32(X[3],  data, 12);
+	GET_UINT32(X[4],  data, 16);
+	GET_UINT32(X[5],  data, 20);
+	GET_UINT32(X[6],  data, 24);
+	GET_UINT32(X[7],  data, 28);
+	GET_UINT32(X[8],  data, 32);
+	GET_UINT32(X[9],  data, 36);
+	GET_UINT32(X[10], data, 40);
+	GET_UINT32(X[11], data, 44);
+	GET_UINT32(X[12], data, 48);
+	GET_UINT32(X[13], data, 52);
+	GET_UINT32(X[14], data, 56);
+	GET_UINT32(X[15], data, 60);
+
+#define S(x, n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
+
+#define P(a, b, c, d, k, s, t)                    \
+{                                                 \
+	a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \
+}
+
+	A = ctx->state[0];
+	B = ctx->state[1];
+	C = ctx->state[2];
+	D = ctx->state[3];
+
+#define F(x, y, z) (z ^ (x & (y ^ z)))
+
+	P(A, B, C, D,  0,  7, 0xD76AA478);
+	P(D, A, B, C,  1, 12, 0xE8C7B756);
+	P(C, D, A, B,  2, 17, 0x242070DB);
+	P(B, C, D, A,  3, 22, 0xC1BDCEEE);
+	P(A, B, C, D,  4,  7, 0xF57C0FAF);
+	P(D, A, B, C,  5, 12, 0x4787C62A);
+	P(C, D, A, B,  6, 17, 0xA8304613);
+	P(B, C, D, A,  7, 22, 0xFD469501);
+	P(A, B, C, D,  8,  7, 0x698098D8);
+	P(D, A, B, C,  9, 12, 0x8B44F7AF);
+	P(C, D, A, B, 10, 17, 0xFFFF5BB1);
+	P(B, C, D, A, 11, 22, 0x895CD7BE);
+	P(A, B, C, D, 12,  7, 0x6B901122);
+	P(D, A, B, C, 13, 12, 0xFD987193);
+	P(C, D, A, B, 14, 17, 0xA679438E);
+	P(B, C, D, A, 15, 22, 0x49B40821);
+
+#undef F
+
+#define F(x, y, z) (y ^ (z & (x ^ y)))
+
+	P(A, B, C, D,  1,  5, 0xF61E2562);
+	P(D, A, B, C,  6,  9, 0xC040B340);
+	P(C, D, A, B, 11, 14, 0x265E5A51);
+	P(B, C, D, A,  0, 20, 0xE9B6C7AA);
+	P(A, B, C, D,  5,  5, 0xD62F105D);
+	P(D, A, B, C, 10,  9, 0x02441453);
+	P(C, D, A, B, 15, 14, 0xD8A1E681);
+	P(B, C, D, A,  4, 20, 0xE7D3FBC8);
+	P(A, B, C, D,  9,  5, 0x21E1CDE6);
+	P(D, A, B, C, 14,  9, 0xC33707D6);
+	P(C, D, A, B,  3, 14, 0xF4D50D87);
+	P(B, C, D, A,  8, 20, 0x455A14ED);
+	P(A, B, C, D, 13,  5, 0xA9E3E905);
+	P(D, A, B, C,  2,  9, 0xFCEFA3F8);
+	P(C, D, A, B,  7, 14, 0x676F02D9);
+	P(B, C, D, A, 12, 20, 0x8D2A4C8A);
+
+#undef F
+
+#define F(x, y, z) (x ^ y ^ z)
+
+	P(A, B, C, D,  5,  4, 0xFFFA3942);
+	P(D, A, B, C,  8, 11, 0x8771F681);
+	P(C, D, A, B, 11, 16, 0x6D9D6122);
+	P(B, C, D, A, 14, 23, 0xFDE5380C);
+	P(A, B, C, D,  1,  4, 0xA4BEEA44);
+	P(D, A, B, C,  4, 11, 0x4BDECFA9);
+	P(C, D, A, B,  7, 16, 0xF6BB4B60);
+	P(B, C, D, A, 10, 23, 0xBEBFBC70);
+	P(A, B, C, D, 13,  4, 0x289B7EC6);
+	P(D, A, B, C,  0, 11, 0xEAA127FA);
+	P(C, D, A, B,  3, 16, 0xD4EF3085);
+	P(B, C, D, A,  6, 23, 0x04881D05);
+	P(A, B, C, D,  9,  4, 0xD9D4D039);
+	P(D, A, B, C, 12, 11, 0xE6DB99E5);
+	P(C, D, A, B, 15, 16, 0x1FA27CF8);
+	P(B, C, D, A,  2, 23, 0xC4AC5665);
+
+#undef F
+
+#define F(x, y, z) (y ^ (x | ~z))
+
+	P(A, B, C, D,  0,  6, 0xF4292244);
+	P(D, A, B, C,  7, 10, 0x432AFF97);
+	P(C, D, A, B, 14, 15, 0xAB9423A7);
+	P(B, C, D, A,  5, 21, 0xFC93A039);
+	P(A, B, C, D, 12,  6, 0x655B59C3);
+	P(D, A, B, C,  3, 10, 0x8F0CCC92);
+	P(C, D, A, B, 10, 15, 0xFFEFF47D);
+	P(B, C, D, A,  1, 21, 0x85845DD1);
+	P(A, B, C, D,  8,  6, 0x6FA87E4F);
+	P(D, A, B, C, 15, 10, 0xFE2CE6E0);
+	P(C, D, A, B,  6, 15, 0xA3014314);
+	P(B, C, D, A, 13, 21, 0x4E0811A1);
+	P(A, B, C, D,  4,  6, 0xF7537E82);
+	P(D, A, B, C, 11, 10, 0xBD3AF235);
+	P(C, D, A, B,  2, 15, 0x2AD7D2BB);
+	P(B, C, D, A,  9, 21, 0xEB86D391);
+
+#undef F
+
+	ctx->state[0] += A;
+	ctx->state[1] += B;
+	ctx->state[2] += C;
+	ctx->state[3] += D;
+}
+
+void md5_update(md5_context *ctx, const uint8 *input, uint32 length) {
+	uint32 left, fill;
+
+	if (!length)
+		return;
+
+	left = ctx->total[0] & 0x3F;
+	fill = 64 - left;
+
+	ctx->total[0] += length;
+	ctx->total[0] &= 0xFFFFFFFF;
+
+	if (ctx->total[0] < length)
+		ctx->total[1]++;
+
+	if (left && length >= fill) {
+		memcpy((void *)(ctx->buffer + left), (const void *)input, fill);
+		md5_process(ctx, ctx->buffer);
+		length -= fill;
+		input  += fill;
+		left = 0;
+	}
+
+	while (length >= 64) {
+		md5_process(ctx, input);
+		length -= 64;
+		input  += 64;
+	}
+
+	if (length) {
+		memcpy((void *)(ctx->buffer + left), (const void *)input, length);
+	}
+}
+
+static const uint8 md5_padding[64] = {
+	0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+void md5_finish(md5_context *ctx, uint8 digest[16]) {
+	uint32 last, padn;
+	uint32 high, low;
+	uint8 msglen[8];
+
+	high = (ctx->total[0] >> 29) | (ctx->total[1] << 3);
+	low  = (ctx->total[0] <<  3);
+
+	PUT_UINT32(low,  msglen, 0);
+	PUT_UINT32(high, msglen, 4);
+
+	last = ctx->total[0] & 0x3F;
+	padn = (last < 56) ? (56 - last) : (120 - last);
+
+	md5_update(ctx, md5_padding, padn);
+	md5_update(ctx, msglen, 8);
+
+	PUT_UINT32(ctx->state[0], digest,  0);
+	PUT_UINT32(ctx->state[1], digest,  4);
+	PUT_UINT32(ctx->state[2], digest,  8);
+	PUT_UINT32(ctx->state[3], digest, 12);
+}
+
+bool md5_file(const char *name, uint8 digest[16], uint32 length) {
+	FILE *f;
+
+	f = fopen(name, "rb");
+	if (f == NULL) {
+		printf("md5_file couldn't open '%s'\n", name);
+		return false;
+	}
+
+	md5_context ctx;
+	uint32 i;
+	unsigned char buf[1000];
+	bool restricted = (length != 0);
+	int readlen;
+
+	if (!restricted || sizeof(buf) <= length)
+		readlen = sizeof(buf);
+	else
+		readlen = length;
+
+	md5_starts(&ctx);
+
+
+	while ((i = (uint32)fread(buf, 1, readlen, f)) > 0) {
+		md5_update(&ctx, buf, i);
+
+		length -= i;
+		if (restricted && length == 0)
+			break;
+
+		if (restricted && sizeof(buf) > length)
+			readlen = length;
+	}
+
+	md5_finish(&ctx, digest);
+	fclose(f);
+	return true;
+}