c files renamed to cpp

git-svn-id: http://svn.miranda-ng.org/main/trunk@10013 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 205 insertions, 0 deletions

diff --git a/protocols/Yahoo/src/libyahoo2/crypt.cpp b/protocols/Yahoo/src/libyahoo2/crypt.cpp
new file mode 100644
index 0000000000..b54456fd85
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+++ b/protocols/Yahoo/src/libyahoo2/crypt.cpp
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+/* One way encryption based on MD5 sum.

+   Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc.

+   This file is part of the GNU C Library.

+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.

+

+   The GNU C Library is free software; you can redistribute it and/or

+   modify it under the terms of the GNU Lesser General Public

+   License as published by the Free Software Foundation; either

+   version 2.1 of the License, or (at your option) any later version.

+

+   The GNU C Library 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

+   Lesser General Public License for more details.

+

+   You should have received a copy of the GNU Lesser General Public

+   License along with the GNU C Library; if not, write to the Free

+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

+   02111-1307 USA.  */

+

+/* warmenhoven took this file and made it work with the md5.[ch] we

+ * already had. isn't that lovely. people should just use linux or

+ * freebsd, crypt works properly on those systems. i hate solaris */

+

+#if HAVE_CONFIG_H

+#  include "config.h"

+#endif

+

+#if HAVE_STRING_H

+#  include <string.h>

+#elif HAVE_STRINGS_H

+#  include <strings.h>

+#endif

+

+#include <stdlib.h>

+#include "yahoo_util.h"

+

+/* Define our magic string to mark salt for MD5 "encryption"

+   replacement.  This is meant to be the same as for other MD5 based

+   encryption implementations.  */

+static const char md5_salt_prefix[] = "$1$";

+

+/* Table with characters for base64 transformation.  */

+static const char b64t[65] =

+"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

+

+char *yahoo_crypt(char *key, char *salt)

+{

+	char *buffer = NULL;

+	int buflen = 0;

+	int needed = 3 + strlen (salt) + 1 + 26 + 1;

+

+	BYTE alt_result[16];

+	mir_md5_state_t ctx;

+	mir_md5_state_t alt_ctx;

+	int salt_len;

+	int key_len;

+	int cnt;

+	char *cp;

+

+	if (buflen < needed) {

+		buflen = needed;

+		if ((buffer = (char*)realloc(buffer, buflen)) == NULL)

+			return NULL;

+	}

+

+	/* Find beginning of salt string.  The prefix should normally always

+	   be present.  Just in case it is not.  */

+	if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)

+		/* Skip salt prefix.  */

+		salt += sizeof (md5_salt_prefix) - 1;

+

+	salt_len = (int)MIN (strcspn (salt, "$"), 8);

+	key_len = (int)strlen (key);

+

+	/* Prepare for the real work.  */

+	mir_md5_init(&ctx);

+

+	/* Add the key string.  */

+	mir_md5_append(&ctx, (BYTE *)key, (int)key_len);

+

+	/* Because the SALT argument need not always have the salt prefix we

+	   add it separately.  */

+	mir_md5_append(&ctx, (BYTE *)md5_salt_prefix, sizeof (md5_salt_prefix) - 1);

+

+	/* The last part is the salt string.  This must be at most 8

+	   characters and it ends at the first `$' character (for

+	   compatibility which existing solutions).  */

+	mir_md5_append(&ctx, (BYTE *)salt, (int)salt_len);

+

+	/* Compute alternate MD5 sum with input KEY, SALT, and KEY.  The

+	   final result will be added to the first context.  */

+	mir_md5_init(&alt_ctx);

+

+	/* Add key.  */

+	mir_md5_append(&alt_ctx, (BYTE *)key, key_len);

+

+	/* Add salt.  */

+	mir_md5_append(&alt_ctx, (BYTE *)salt, salt_len);

+

+	/* Add key again.  */

+	mir_md5_append(&alt_ctx, (BYTE *)key, key_len);

+

+	/* Now get result of this (16 bytes) and add it to the other

+	   context.  */

+	mir_md5_finish(&alt_ctx, alt_result);

+

+	/* Add for any character in the key one byte of the alternate sum.  */

+	for (cnt = key_len; cnt > 16; cnt -= 16)

+		mir_md5_append(&ctx, alt_result, 16);

+	mir_md5_append(&ctx, alt_result, cnt);

+

+	/* For the following code we need a NUL byte.  */

+	alt_result[0] = '\0';

+

+	/* The original implementation now does something weird: for every 1

+	   bit in the key the first 0 is added to the buffer, for every 0

+	   bit the first character of the key.  This does not seem to be

+	   what was intended but we have to follow this to be compatible.  */

+	for (cnt = key_len; cnt > 0; cnt >>= 1)

+		mir_md5_append(&ctx, (cnt & 1) != 0 ? alt_result : (BYTE *)key, 1);

+

+	/* Create intermediate result.  */

+	mir_md5_finish(&ctx, alt_result);

+

+	/* Now comes another weirdness.  In fear of password crackers here

+	   comes a quite long loop which just processes the output of the

+	   previous round again.  We cannot ignore this here.  */

+	for (cnt = 0; cnt < 1000; ++cnt) {

+		/* New context.  */

+		mir_md5_init(&ctx);

+

+		/* Add key or last result.  */

+		if ((cnt & 1) != 0)

+			mir_md5_append(&ctx, (BYTE *)key, key_len);

+		else

+			mir_md5_append(&ctx, alt_result, 16);

+

+		/* Add salt for numbers not divisible by 3.  */

+		if (cnt % 3 != 0)

+			mir_md5_append(&ctx, (BYTE *)salt, salt_len);

+

+		/* Add key for numbers not divisible by 7.  */

+		if (cnt % 7 != 0)

+			mir_md5_append(&ctx, (BYTE *)key, key_len);

+

+		/* Add key or last result.  */

+		if ((cnt & 1) != 0)

+			mir_md5_append(&ctx, alt_result, 16);

+		else

+			mir_md5_append(&ctx, (BYTE *)key, key_len);

+

+		/* Create intermediate result.  */

+		mir_md5_finish(&ctx, alt_result);

+	}

+

+	/* Now we can construct the result string.  It consists of three

+	   parts.  */

+

+	strncpy(buffer, md5_salt_prefix, MAX (0, buflen));

+	cp = buffer + strlen(buffer);

+	buflen -= sizeof (md5_salt_prefix);

+

+	strncpy(cp, salt, MIN (buflen, salt_len));

+	cp = cp + strlen(cp);

+	buflen -= MIN (buflen, salt_len);

+

+	if (buflen > 0) {

+		*cp++ = '$';

+		--buflen;

+	}

+

+#define b64_from_24bit(B2, B1, B0, N) \

+	do { \

+		unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \

+		int n = (N); \

+		while (n-- > 0 && buflen > 0) { \

+			*cp++ = b64t[w & 0x3f]; \

+			--buflen; \

+			w >>= 6; \

+		}\

+	} while (0)

+

+	b64_from_24bit (alt_result[0], alt_result[6], alt_result[12], 4);

+	b64_from_24bit (alt_result[1], alt_result[7], alt_result[13], 4);

+	b64_from_24bit (alt_result[2], alt_result[8], alt_result[14], 4);

+	b64_from_24bit (alt_result[3], alt_result[9], alt_result[15], 4);

+	b64_from_24bit (alt_result[4], alt_result[10], alt_result[5], 4);

+	b64_from_24bit (0, 0, alt_result[11], 2);

+	if (buflen <= 0) {

+		FREE(buffer);

+	} else

+		*cp = '\0';	/* Terminate the string.  */

+

+	/* Clear the buffer for the intermediate result so that people

+	   attaching to processes or reading core dumps cannot get any

+	   information.  We do it in this way to clear correct_words[]

+	   inside the MD5 implementation as well.  */

+	mir_md5_init(&ctx);

+	mir_md5_finish(&ctx, alt_result);

+	memset (&ctx, '\0', sizeof (ctx));

+	memset (&alt_ctx, '\0', sizeof (alt_ctx));

+

+	return buffer;

+}