moved all stuff to github

1 files changed, 563 insertions, 0 deletions

diff --git a/contrib/epee/include/md5_l.inl b/contrib/epee/include/md5_l.inl
new file mode 100644
index 000000000..c3da1a3b0
--- /dev/null
+++ b/contrib/epee/include/md5_l.inl
@@ -0,0 +1,563 @@
+/*
+* libEtPan! -- a mail stuff library
+*
+* Copyright (C) 2001, 2005 - DINH Viet Hoa
+* 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. Neither the name of the libEtPan! project nor the names of its
+*    contributors may be used to endorse or promote products derived
+*    from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS 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 AUTHORS OR 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.
+*/
+
+/*
+* $Id: md5.c,v 1.1.1.1 2005/03/18 20:17:27 zautrix Exp $
+*/
+
+/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
+*/
+
+/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
+rights reserved.
+
+License to copy and use this software is granted provided that it
+is identified as the "RSA Data Security, Inc. MD5 Message-Digest
+Algorithm" in all material mentioning or referencing this software
+or this function.
+
+License is also granted to make and use derivative works provided
+that such works are identified as "derived from the RSA Data
+Security, Inc. MD5 Message-Digest Algorithm" in all material
+mentioning or referencing the derived work.
+
+RSA Data Security, Inc. makes no representations concerning either
+the merchantability of this software or the suitability of this
+software for any particular purpose. It is provided "as is"
+without express or implied warranty of any kind.
+
+These notices must be retained in any copies of any part of this
+documentation and/or software.
+*/
+
+/* do i need all of this just for htonl()? damn. */
+//#include <sys/types.h>
+//#include <sys/param.h>
+//#include <sys/socket.h>
+//#include <netinet/in.h>
+
+
+
+#include "md5global.h"
+#include "md5_l.h"
+#include "hmac-md5.h"
+
+namespace md5
+{
+	/* Constants for MD5Transform routine.
+	*/
+
+#define S11 7
+#define S12 12
+#define S13 17
+#define S14 22
+#define S21 5
+#define S22 9
+#define S23 14
+#define S24 20
+#define S31 4
+#define S32 11
+#define S33 16
+#define S34 23
+#define S41 6
+#define S42 10
+#define S43 15
+#define S44 21
+
+	/*
+	static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
+	static void Encode PROTO_LIST
+	((unsigned char *, UINT4 *, unsigned int)); 
+	static void Decode PROTO_LIST
+	((UINT4 *, unsigned char *, unsigned int)); 
+	static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
+	static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
+	*/
+
+	static void MD5_memcpy (POINTER output, POINTER input, unsigned int len)
+	{
+		unsigned int i; 
+
+		for (i = 0; i < len; i++) 
+			output[i] = input[i]; 
+	}
+
+	/* Note: Replace "for loop" with standard memset if possible.
+	*/
+
+	static void MD5_memset (POINTER output, int value, unsigned int len)
+	{
+		unsigned int i; 
+
+		for (i = 0; i < len; i++) 
+			((char *)output)[i] = (char)value; 
+	}
+
+	static void MD5Transform (UINT4 state[4], unsigned char block[64]);
+
+	static unsigned char* PADDING()
+	{
+		static unsigned char local_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 
+		};
+
+		return local_PADDING;
+
+	}
+
+
+
+	/* F, G, H and I are basic MD5 functions.
+
+	*/
+#ifdef I
+	/* This might be defined via NANA */
+#undef I
+#endif
+
+#define MD5_M_F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+#define MD5_M_G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+#define MD5_M_H(x, y, z) ((x) ^ (y) ^ (z))
+#define MD5_M_I(x, y, z) ((y) ^ ((x) | (~z)))
+
+	/* ROTATE_LEFT rotates x left n bits.
+
+	*/
+
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+
+	/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
+	Rotation is separate from addition to prevent recomputation.
+	*/
+
+#define FF(a, b, c, d, x, s, ac) { (a) += MD5_M_F ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s));        (a) += (b);        } 
+#define GG(a, b, c, d, x, s, ac) {        (a) += MD5_M_G ((b), (c), (d)) + (x) + (UINT4)(ac);        (a) = ROTATE_LEFT ((a), (s));        (a) += (b);         } 
+#define HH(a, b, c, d, x, s, ac) {        (a) += MD5_M_H ((b), (c), (d)) + (x) + (UINT4)(ac);        (a) = ROTATE_LEFT ((a), (s));        (a) += (b);        } 
+#define II(a, b, c, d, x, s, ac) {        (a) += MD5_M_I ((b), (c), (d)) + (x) + (UINT4)(ac);        (a) = ROTATE_LEFT ((a), (s));        (a) += (b);        } 
+
+	/* MD5 initialization. Begins an MD5 operation, writing a new context.
+	*/
+
+	static void MD5Init(MD5_CTX * context)
+	{
+		context->count[0] = context->count[1] = 0; 
+
+		/* Load magic initialization constants.
+
+		*/
+		context->state[0] = 0x67452301; 
+		context->state[1] = 0xefcdab89; 
+		context->state[2] = 0x98badcfe; 
+		context->state[3] = 0x10325476; 
+	}
+
+	/* MD5 block update operation. Continues an MD5 message-digest
+	operation, processing another message block, and updating the context. 
+	*/
+
+	static void MD5Update( MD5_CTX *context, const unsigned char *input, unsigned int inputLen )
+	{
+		unsigned int i, index, partLen; 
+
+		/* Compute number of bytes mod 64 */
+		index = (unsigned int)((context->count[0] >> 3) & 0x3F);
+
+		/* Update number of bits */
+		if ((context->count[0] += ((UINT4)inputLen << 3))
+			< ((UINT4)inputLen << 3))
+			context->count[1]++;
+		context->count[1] += ((UINT4)inputLen >> 29);
+
+		partLen = 64 - index; 
+
+		/* Transform as many times as possible.
+
+		*/
+		if (inputLen >= partLen)
+		{ 
+			MD5_memcpy( (POINTER)&context->buffer[index], (POINTER)input, partLen );
+			MD5Transform( context->state, context->buffer ); 
+
+			for (i = partLen; i + 63 < inputLen; i += 64) 
+				MD5Transform (context->state, (unsigned char*)&input[i]); 
+
+			index = 0; 
+		} 
+		else 
+			i = 0; 
+
+		/* Buffer remaining input */
+		MD5_memcpy( (POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i );
+
+	}
+
+	/* Encodes input (UINT4) into output (unsigned char). Assumes len is
+	a multiple of 4. 
+
+	*/
+
+	static void Encode (unsigned char *output, UINT4 *input, unsigned int len)
+	{
+		unsigned int i, j; 
+
+		for (i = 0, j = 0; j < len; i++, j += 4) { 
+			output[j] = (unsigned char)(input[i] & 0xff); 
+			output[j+1] = (unsigned char)((input[i] >> 8) & 0xff); 
+			output[j+2] = (unsigned char)((input[i] >> 16) & 0xff); 
+			output[j+3] = (unsigned char)((input[i] >> 24) & 0xff); 
+		} 
+	}
+
+	/* Decodes input (unsigned char) into output (UINT4). Assumes len is
+	a multiple of 4. 
+
+	*/
+
+	static void Decode (UINT4 *output, unsigned char *input, unsigned int len)
+	{
+		unsigned int i, j; 
+
+		for (i = 0, j = 0; j < len; i++, j += 4) 
+			output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) | (((UINT4)input[j+2]) << 16)
+			| (((UINT4)input[j+3]) << 24); 
+	}
+
+	/* MD5 finalization. Ends an MD5 message-digest operation, writing the
+	the message digest and zeroizing the context. 
+
+	*/
+
+	static void MD5Final ( unsigned char digest[16], MD5_CTX *context )
+	{
+		unsigned char bits[8]; 
+		unsigned int index, padLen; 
+
+		/* Save number of bits */
+		Encode (bits, context->count, 8);
+
+		/* Pad out to 56 mod 64.
+
+		*/
+		index = (unsigned int)((context->count[0] >> 3) & 0x3f); 
+		padLen = (index < 56) ? (56 - index) : (120 - index); 
+		MD5Update (context, PADDING(), padLen); 
+
+		/* Append length (before padding) */
+		MD5Update (context, bits, 8);
+
+		/* Store state in digest */
+		Encode (digest, context->state, 16);
+
+		/* Zeroize sensitive information.
+
+		*/
+		MD5_memset ((POINTER)context, 0, sizeof (*context)); 
+	}
+
+	/* MD5 basic transformation. Transforms state based on block.
+
+	*/
+
+	static void MD5Transform (UINT4 state[4], unsigned char block[64])
+	{
+		UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16]; 
+
+		Decode (x, block, 64); 
+
+		/* Round 1 */
+		FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
+		FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
+		FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
+		FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
+		FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
+		FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
+		FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
+		FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
+		FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
+		FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
+		FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
+		FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
+		FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
+		FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
+		FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
+		FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
+
+		/* Round 2 */
+		GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
+		GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
+		GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
+		GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
+		GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
+		GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
+		GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
+		GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
+		GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
+		GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
+		GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
+		GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ 
+		GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ 
+		GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ 
+		GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ 
+		GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ 
+
+		/* Round 3 */
+		HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
+		HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
+		HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
+		HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
+		HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
+		HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
+		HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
+		HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
+		HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
+		HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
+		HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
+		HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
+		HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
+		HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
+		HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
+		HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
+
+		/* Round 4 */
+		II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
+		II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
+		II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
+		II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
+		II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
+		II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
+		II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
+		II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
+		II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
+		II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
+		II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
+		II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
+		II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
+		II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
+		II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
+		II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
+
+		state[0] += a; 
+		state[1] += b; 
+		state[2] += c; 
+		state[3] += d; 
+
+		/* Zeroize sensitive information.
+		*/
+		MD5_memset ((POINTER)x, 0, sizeof (x)); 
+	}
+
+	/* Note: Replace "for loop" with standard memcpy if possible.
+
+	*/
+  inline
+	void hmac_md5_init(HMAC_MD5_CTX *hmac,
+		const unsigned char *key,
+		int key_len)
+	{
+		unsigned char k_ipad[65];    /* inner padding -
+									 * key XORd with ipad
+									 */
+		unsigned char k_opad[65];    /* outer padding -
+									 * key XORd with opad
+									 */
+		unsigned char tk[16];
+		int i;
+		/* if key is longer than 64 bytes reset it to key=MD5(key) */
+		if (key_len > 64) {
+
+			MD5_CTX      tctx;
+
+			MD5Init(&tctx); 
+			MD5Update(&tctx, key, key_len); 
+			MD5Final(tk, &tctx); 
+
+			key = tk; 
+			key_len = 16; 
+		} 
+
+		/*
+		* the HMAC_MD5 transform looks like:
+		*
+		* MD5(K XOR opad, MD5(K XOR ipad, text))
+		*
+		* where K is an n byte key
+		* ipad is the byte 0x36 repeated 64 times
+		* opad is the byte 0x5c repeated 64 times
+		* and text is the data being protected
+		*/
+
+		/* start out by storing key in pads */
+		MD5_memset(k_ipad, '\0', sizeof k_ipad);
+		MD5_memset(k_opad, '\0', sizeof k_opad);
+		MD5_memcpy( k_ipad, (POINTER)key, key_len);
+		MD5_memcpy( k_opad, (POINTER)key, key_len);
+
+		/* XOR key with ipad and opad values */
+		for (i=0; i<64; i++) {
+			k_ipad[i] ^= 0x36;
+			k_opad[i] ^= 0x5c;
+		}
+
+		MD5Init(&hmac->ictx);                   /* init inner context */
+		MD5Update(&hmac->ictx, k_ipad, 64);     /* apply inner pad */
+
+		MD5Init(&hmac->octx);                   /* init outer context */
+		MD5Update(&hmac->octx, k_opad, 64);     /* apply outer pad */
+
+		/* scrub the pads and key context (if used) */
+		MD5_memset( (POINTER)&k_ipad, 0, sizeof(k_ipad));
+		MD5_memset( (POINTER)&k_opad, 0, sizeof(k_opad));
+		MD5_memset( (POINTER)&tk, 0, sizeof(tk));
+
+		/* and we're done. */
+	}
+
+	/* The precalc and import routines here rely on the fact that we pad
+	* the key out to 64 bytes and use that to initialize the md5
+	* contexts, and that updating an md5 context with 64 bytes of data
+	* leaves nothing left over; all of the interesting state is contained
+	* in the state field, and none of it is left over in the count and
+	* buffer fields.  So all we have to do is save the state field; we
+	* can zero the others when we reload it.  Which is why the decision
+	* was made to pad the key out to 64 bytes in the first place. */
+	inline 
+    void hmac_md5_precalc(HMAC_MD5_STATE *state,
+		const unsigned char *key,
+		int key_len)
+	{
+		HMAC_MD5_CTX hmac;
+		unsigned lupe;
+
+		hmac_md5_init(&hmac, key, key_len);
+		for (lupe = 0; lupe < 4; lupe++) {
+			state->istate[lupe] = htonl(hmac.ictx.state[lupe]);
+			state->ostate[lupe] = htonl(hmac.octx.state[lupe]);
+		}
+		MD5_memset( (POINTER)&hmac, 0, sizeof(hmac));
+	}
+
+
+  inline
+	void hmac_md5_import(HMAC_MD5_CTX *hmac,
+		HMAC_MD5_STATE *state)
+	{
+		unsigned lupe;
+		MD5_memset( (POINTER)hmac, 0, sizeof(HMAC_MD5_CTX));
+		for (lupe = 0; lupe < 4; lupe++) {
+			hmac->ictx.state[lupe] = ntohl(state->istate[lupe]);
+			hmac->octx.state[lupe] = ntohl(state->ostate[lupe]);
+		}
+		/* Init the counts to account for our having applied
+		* 64 bytes of key; this works out to 0x200 (64 << 3; see
+		* MD5Update above...) */
+		hmac->ictx.count[0] = hmac->octx.count[0] = 0x200;
+	}
+
+  inline
+	void hmac_md5_final(unsigned char digest[HMAC_MD5_SIZE],
+		HMAC_MD5_CTX *hmac)
+	{
+		MD5Final(digest, &hmac->ictx);  /* Finalize inner md5 */
+		MD5Update(&hmac->octx, digest, 16); /* Update outer ctx */
+		MD5Final(digest, &hmac->octx); /* Finalize outer md5 */
+	}
+
+
+	void hmac_md5(const unsigned char* text, int text_len, const unsigned char* key, int key_len, unsigned char *digest)
+	{
+		MD5_CTX context; 
+
+		unsigned char k_ipad[65];    /* inner padding -
+									 * key XORd with ipad
+									 */
+		unsigned char k_opad[65];    /* outer padding -
+									 * key XORd with opad
+									 */
+		unsigned char tk[16];
+		int i;
+		/* if key is longer than 64 bytes reset it to key=MD5(key) */
+		if (key_len > 64) {
+
+			MD5_CTX      tctx;
+
+			MD5Init(&tctx); 
+			MD5Update(&tctx, key, key_len); 
+			MD5Final(tk, &tctx); 
+
+			key = tk; 
+			key_len = 16; 
+		} 
+
+		/*
+		* the HMAC_MD5 transform looks like:
+		*
+		* MD5(K XOR opad, MD5(K XOR ipad, text))
+		*
+		* where K is an n byte key
+		* ipad is the byte 0x36 repeated 64 times
+		* opad is the byte 0x5c repeated 64 times
+		* and text is the data being protected
+		*/
+
+		/* start out by storing key in pads */
+		MD5_memset(k_ipad, '\0', sizeof k_ipad);
+		MD5_memset(k_opad, '\0', sizeof k_opad);
+		MD5_memcpy( k_ipad,  (POINTER)key, key_len);
+		MD5_memcpy( k_opad,  (POINTER)key, key_len);
+
+		/* XOR key with ipad and opad values */
+		for (i=0; i<64; i++) {
+			k_ipad[i] ^= 0x36;
+			k_opad[i] ^= 0x5c;
+		}
+		/*
+		* perform inner MD5
+		*/
+
+		MD5Init(&context);                   /* init context for 1st
+											 * pass */
+		MD5Update(&context, k_ipad, 64);      /* start with inner pad */
+		MD5Update(&context, text, text_len); /* then text of datagram */
+		MD5Final(digest, &context);          /* finish up 1st pass */
+
+		/*
+		* perform outer MD5
+		*/
+		MD5Init(&context);                   /* init context for 2nd
+											 * pass */
+		MD5Update(&context, k_opad, 64);     /* start with outer pad */
+		MD5Update(&context, digest, 16);     /* then results of 1st
+											 * hash */
+		MD5Final(digest, &context);          /* finish up 2nd pass */
+
+	}
+}
\ No newline at end of file