ObjXMPP  Check-in [2adf07b564]

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				DYLIB_CURRENT_VERSION = 0;
				FRAMEWORK_VERSION = A;
				GCC_DYNAMIC_NO_PIC = NO;
				GCC_ENABLE_OBJC_EXCEPTIONS = YES;
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AS_IF([test x"$enable_static" = x"yes" -o x"$enable_shared" = x"no"], [
	AC_PATH_TOOL(AR, ar)
	AC_PROG_RANLIB
	AC_SUBST(OBJXMPP_STATIC_LIB, "libobjxmpp.a")
])

AC_CHECK_LIB(objopenssl, main, [
	LIBS="$LIBS -lobjopenssl"
], [
	AC_MSG_ERROR(You need ObjOpenSSL installed!)
])

PKG_CHECK_MODULES(libidn, [libidn >= 0.25], [
	CPPFLAGS="$CPPFLAGS $libidn_CFLAGS"
	LIBS="$LIBS $libidn_LIBS"

       XMPPPLAINAuth.m		\
       XMPPPresence.m		\
       XMPPRoster.m		\
       XMPPRosterItem.m		\
       XMPPSCRAMAuth.m		\
       XMPPStanza.m

INCLUDES := ${SRCS:.m=.h}

SRCS += arc4random_uniform.m

include ../buildsys.mk

LD = ${OBJC}

 * 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.
 */

#include <string.h>





#import "XMPPSCRAMAuth.h"
#import "XMPPExceptions.h"

#define HMAC_IPAD 0x36
#define HMAC_OPAD 0x5c

#ifndef HAVE_ARC4RANDOM_UNIFORM
extern uint32_t arc4random_uniform(uint32_t);
#endif

@implementation XMPPSCRAMAuth
+ SCRAMAuthWithAuthcid: (OFString*)authcid
	      password: (OFString*)password
		  hash: (Class)hash;
{
	return [[[self alloc] initWithAuthcid: authcid
				     password: password

						      reason: value];

	[pool release];
}

- (OFString*)XMPP_genNonce
{
	OFMutableString *nonce = [OFMutableString string];

	uint32_t res, i;


	for (i = 0; i < 64; i++) {

		while ((res = arc4random_uniform('~' - '!' + 1) + '!') == ',');


		[nonce appendFormat: @"%c", res];

	}

	return nonce;

}

- (uint8_t*)XMPP_HMACWithKey: (OFDataArray*)key
			data: (OFDataArray*)data
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFDataArray *k = [OFDataArray dataArrayWithItemSize: 1];

/*
 * Copyright (c) 1996, David Mazieres <dm@uun.org>
 * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * Arc4 random number generator for OpenBSD.
 *
 * This code is derived from section 17.1 of Applied Cryptography,
 * second edition, which describes a stream cipher allegedly
 * compatible with RSA Labs "RC4" cipher (the actual description of
 * which is a trade secret).  The same algorithm is used as a stream
 * cipher called "arcfour" in Tatu Ylonen's ssh package.
 *
 * RC4 is a registered trademark of RSA Laboratories.
 */

#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
    defined(__APPLE__)
# include <stdlib.h>
#else
# include <bsd/stdlib.h>
#endif
#include <stdint.h>

/*
 * Calculate a uniformly distributed random number less than upper_bound
 * avoiding "modulo bias".
 *
 * Uniformity is achieved by generating new random numbers until the one
 * returned is outside the range [0, 2**32 % upper_bound).  This
 * guarantees the selected random number will be inside
 * [2**32 % upper_bound, 2**32) which maps back to [0, upper_bound)
 * after reduction modulo upper_bound.
 */
uint32_t
arc4random_uniform(uint32_t upper_bound)
{
	uint32_t r, min;

	if (upper_bound < 2)
		return 0;

#if (ULONG_MAX > 0xffffffffUL)
	min = 0x100000000UL % upper_bound;
#else
	/* Calculate (2**32 % upper_bound) avoiding 64-bit math */
	if (upper_bound > 0x80000000)
		min = 1 + ~upper_bound;		/* 2**32 - upper_bound */
	else {
		/* (2**32 - (x * 2)) % x == 2**32 % x when x <= 2**31 */
		min = ((0xffffffff - (upper_bound * 2)) + 1) % upper_bound;
	}
#endif

	/*
	 * This could theoretically loop forever but each retry has
	 * p > 0.5 (worst case, usually far better) of selecting a
	 * number inside the range we need, so it should rarely need
	 * to re-roll.
	 */
	for (;;) {
		r = arc4random();
		if (r >= min)
			break;
	}

	return r % upper_bound;
}