diff options
| author | Wilmer van der Gaast <wilmer@gaast.net> | 2012-10-20 00:16:52 +0100 | 
|---|---|---|
| committer | Wilmer van der Gaast <wilmer@gaast.net> | 2012-10-20 00:16:52 +0100 | 
| commit | 386042c08547bbe7f0b62ad97cdd8488cc13e97e (patch) | |
| tree | 592ee099b5f90ec999a6862ace21fbc7a8d5aa0c /protocols/yahoo/crypt.c | |
| parent | 0eb971a6d1a996fbb76eae815145a88abebad75d (diff) | |
Removing some more cruft now that I've (re)discovered ld garbage collection.
Mostly stuff related to obsolete Y!MSG login obfuscation schemes.
Diffstat (limited to 'protocols/yahoo/crypt.c')
| -rw-r--r-- | protocols/yahoo/crypt.c | 203 | 
1 files changed, 0 insertions, 203 deletions
| diff --git a/protocols/yahoo/crypt.c b/protocols/yahoo/crypt.c deleted file mode 100644 index 5122e3af..00000000 --- a/protocols/yahoo/crypt.c +++ /dev/null @@ -1,203 +0,0 @@ -/* 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_STRING_H -#  include <string.h> -#elif HAVE_STRINGS_H -#  include <strings.h> -#endif - -#include <stdlib.h> -#include "yahoo_util.h" - -#include "md5.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[64] = -"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; - -char *yahoo_crypt(char *key, char *salt) -{ -	char *buffer = NULL; -	int buflen = 0; -	int needed = 3 + strlen (salt) + 1 + 26 + 1; - -	md5_byte_t alt_result[16]; -	md5_state_t ctx; -	md5_state_t alt_ctx; -	size_t salt_len; -	size_t key_len; -	size_t cnt; -	char *cp; - -	if (buflen < needed) { -		buflen = needed; -		if ((buffer = 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 = MIN (strcspn (salt, "$"), 8); -	key_len = strlen (key); - -	/* Prepare for the real work.  */ -	md5_init(&ctx); - -	/* Add the key string.  */ -	md5_append(&ctx, (md5_byte_t *)key, key_len); - -	/* Because the SALT argument need not always have the salt prefix we -	   add it separately.  */ -	md5_append(&ctx, (md5_byte_t *)md5_salt_prefix, sizeof (md5_salt_prefix) - 1); - -	/* The last part is the salt string.  This must be at most 8 -	   characters and it ends at the first `$' character (for -	   compatibility which existing solutions).  */ -	md5_append(&ctx, (md5_byte_t *)salt, salt_len); - -	/* Compute alternate MD5 sum with input KEY, SALT, and KEY.  The -	   final result will be added to the first context.  */ -	md5_init(&alt_ctx); - -	/* Add key.  */ -	md5_append(&alt_ctx, (md5_byte_t *)key, key_len); - -	/* Add salt.  */ -	md5_append(&alt_ctx, (md5_byte_t *)salt, salt_len); - -	/* Add key again.  */ -	md5_append(&alt_ctx, (md5_byte_t *)key, key_len); - -	/* Now get result of this (16 bytes) and add it to the other -	   context.  */ -	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) -		md5_append(&ctx, alt_result, 16); -	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) -		md5_append(&ctx, (cnt & 1) != 0 ? alt_result : (md5_byte_t *)key, 1); - -	/* Create intermediate result.  */ -	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.  */ -		md5_init(&ctx); - -		/* Add key or last result.  */ -		if ((cnt & 1) != 0) -			md5_append(&ctx, (md5_byte_t *)key, key_len); -		else -			md5_append(&ctx, alt_result, 16); - -		/* Add salt for numbers not divisible by 3.  */ -		if (cnt % 3 != 0) -			md5_append(&ctx, (md5_byte_t *)salt, salt_len); - -		/* Add key for numbers not divisible by 7.  */ -		if (cnt % 7 != 0) -			md5_append(&ctx, (md5_byte_t *)key, key_len); - -		/* Add key or last result.  */ -		if ((cnt & 1) != 0) -			md5_append(&ctx, alt_result, 16); -		else -			md5_append(&ctx, (md5_byte_t *)key, key_len); - -		/* Create intermediate result.  */ -		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 ((size_t) buflen, salt_len)); -	cp = cp + strlen(cp); -	buflen -= MIN ((size_t) 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.  */ -	md5_init(&ctx); -	md5_finish(&ctx, alt_result); -	memset (&ctx, '\0', sizeof (ctx)); -	memset (&alt_ctx, '\0', sizeof (alt_ctx)); - -	return buffer; -} | 
