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This library is stripped down version of NetServices library. HTTP server and client function is NOT supported.

lwip/netif/ppp/md5.c@0:dcf3c92487ca, 2011-07-20 (annotated)

Committer:: idinor
Date:: Wed Jul 20 11:45:39 2011 +0000
Revision:: 0:dcf3c92487ca

Who changed what in which revision?

User	Revision	Line number	New contents of line
idinor	0:dcf3c92487ca	1	/*
idinor	0:dcf3c92487ca	2	***********************************************************************
idinor	0:dcf3c92487ca	3	md5.c -- the source code for MD5 routines
idinor	0:dcf3c92487ca	4	RSA Data Security, Inc. MD5 Message-Digest Algorithm
idinor	0:dcf3c92487ca	5	Created: 2/17/90 RLR
idinor	0:dcf3c92487ca	6	Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr.
idinor	0:dcf3c92487ca	7	***********************************************************************
idinor	0:dcf3c92487ca	8	*/
idinor	0:dcf3c92487ca	9
idinor	0:dcf3c92487ca	10	/*
idinor	0:dcf3c92487ca	11	***********************************************************************
idinor	0:dcf3c92487ca	12	Copyright (C) 1990, RSA Data Security, Inc. All rights reserved.
idinor	0:dcf3c92487ca	13
idinor	0:dcf3c92487ca	14	License to copy and use this software is granted provided that
idinor	0:dcf3c92487ca	15	it is identified as the "RSA Data Security, Inc. MD5 Message-
idinor	0:dcf3c92487ca	16	Digest Algorithm" in all material mentioning or referencing this
idinor	0:dcf3c92487ca	17	software or this function.
idinor	0:dcf3c92487ca	18
idinor	0:dcf3c92487ca	19	License is also granted to make and use derivative works
idinor	0:dcf3c92487ca	20	provided that such works are identified as "derived from the RSA
idinor	0:dcf3c92487ca	21	Data Security, Inc. MD5 Message-Digest Algorithm" in all
idinor	0:dcf3c92487ca	22	material mentioning or referencing the derived work.
idinor	0:dcf3c92487ca	23
idinor	0:dcf3c92487ca	24	RSA Data Security, Inc. makes no representations concerning
idinor	0:dcf3c92487ca	25	either the merchantability of this software or the suitability
idinor	0:dcf3c92487ca	26	of this software for any particular purpose. It is provided "as
idinor	0:dcf3c92487ca	27	is" without express or implied warranty of any kind.
idinor	0:dcf3c92487ca	28
idinor	0:dcf3c92487ca	29	These notices must be retained in any copies of any part of this
idinor	0:dcf3c92487ca	30	documentation and/or software.
idinor	0:dcf3c92487ca	31	***********************************************************************
idinor	0:dcf3c92487ca	32	*/
idinor	0:dcf3c92487ca	33
idinor	0:dcf3c92487ca	34	#include "lwip/opt.h"
idinor	0:dcf3c92487ca	35
idinor	0:dcf3c92487ca	36	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
idinor	0:dcf3c92487ca	37
idinor	0:dcf3c92487ca	38	#if CHAP_SUPPORT \|\| MD5_SUPPORT
idinor	0:dcf3c92487ca	39
idinor	0:dcf3c92487ca	40	#include "ppp.h"
idinor	0:dcf3c92487ca	41	#include "pppdebug.h"
idinor	0:dcf3c92487ca	42
idinor	0:dcf3c92487ca	43	#include "md5.h"
idinor	0:dcf3c92487ca	44
idinor	0:dcf3c92487ca	45	#include <string.h>
idinor	0:dcf3c92487ca	46
idinor	0:dcf3c92487ca	47	/*
idinor	0:dcf3c92487ca	48	***********************************************************************
idinor	0:dcf3c92487ca	49	Message-digest routines:
idinor	0:dcf3c92487ca	50	To form the message digest for a message M
idinor	0:dcf3c92487ca	51	(1) Initialize a context buffer mdContext using MD5Init
idinor	0:dcf3c92487ca	52	(2) Call MD5Update on mdContext and M
idinor	0:dcf3c92487ca	53	(3) Call MD5Final on mdContext
idinor	0:dcf3c92487ca	54	The message digest is now in mdContext->digest[0...15]
idinor	0:dcf3c92487ca	55	***********************************************************************
idinor	0:dcf3c92487ca	56	*/
idinor	0:dcf3c92487ca	57
idinor	0:dcf3c92487ca	58	/* forward declaration */
idinor	0:dcf3c92487ca	59	static void Transform (u32_t buf, u32_t in);
idinor	0:dcf3c92487ca	60
idinor	0:dcf3c92487ca	61	static unsigned char PADDING[64] = {
idinor	0:dcf3c92487ca	62	0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
idinor	0:dcf3c92487ca	63	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
idinor	0:dcf3c92487ca	64	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
idinor	0:dcf3c92487ca	65	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
idinor	0:dcf3c92487ca	66	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
idinor	0:dcf3c92487ca	67	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
idinor	0:dcf3c92487ca	68	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
idinor	0:dcf3c92487ca	69	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
idinor	0:dcf3c92487ca	70	};
idinor	0:dcf3c92487ca	71
idinor	0:dcf3c92487ca	72	/* F, G, H and I are basic MD5 functions */
idinor	0:dcf3c92487ca	73	#define F(x, y, z) (((x) & (y)) \| ((~x) & (z)))
idinor	0:dcf3c92487ca	74	#define G(x, y, z) (((x) & (z)) \| ((y) & (~z)))
idinor	0:dcf3c92487ca	75	#define H(x, y, z) ((x) ^ (y) ^ (z))
idinor	0:dcf3c92487ca	76	#define I(x, y, z) ((y) ^ ((x) \| (~z)))
idinor	0:dcf3c92487ca	77
idinor	0:dcf3c92487ca	78	/* ROTATE_LEFT rotates x left n bits */
idinor	0:dcf3c92487ca	79	#define ROTATE_LEFT(x, n) (((x) << (n)) \| ((x) >> (32-(n))))
idinor	0:dcf3c92487ca	80
idinor	0:dcf3c92487ca	81	/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
idinor	0:dcf3c92487ca	82	/* Rotation is separate from addition to prevent recomputation */
idinor	0:dcf3c92487ca	83	#define FF(a, b, c, d, x, s, ac) \
idinor	0:dcf3c92487ca	84	{(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \
idinor	0:dcf3c92487ca	85	(a) = ROTATE_LEFT ((a), (s)); \
idinor	0:dcf3c92487ca	86	(a) += (b); \
idinor	0:dcf3c92487ca	87	}
idinor	0:dcf3c92487ca	88	#define GG(a, b, c, d, x, s, ac) \
idinor	0:dcf3c92487ca	89	{(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \
idinor	0:dcf3c92487ca	90	(a) = ROTATE_LEFT ((a), (s)); \
idinor	0:dcf3c92487ca	91	(a) += (b); \
idinor	0:dcf3c92487ca	92	}
idinor	0:dcf3c92487ca	93	#define HH(a, b, c, d, x, s, ac) \
idinor	0:dcf3c92487ca	94	{(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \
idinor	0:dcf3c92487ca	95	(a) = ROTATE_LEFT ((a), (s)); \
idinor	0:dcf3c92487ca	96	(a) += (b); \
idinor	0:dcf3c92487ca	97	}
idinor	0:dcf3c92487ca	98	#define II(a, b, c, d, x, s, ac) \
idinor	0:dcf3c92487ca	99	{(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \
idinor	0:dcf3c92487ca	100	(a) = ROTATE_LEFT ((a), (s)); \
idinor	0:dcf3c92487ca	101	(a) += (b); \
idinor	0:dcf3c92487ca	102	}
idinor	0:dcf3c92487ca	103
idinor	0:dcf3c92487ca	104	#ifdef __STDC__
idinor	0:dcf3c92487ca	105	#define UL(x) x##UL
idinor	0:dcf3c92487ca	106	#else
idinor	0:dcf3c92487ca	107	#ifdef WIN32
idinor	0:dcf3c92487ca	108	#define UL(x) x##UL
idinor	0:dcf3c92487ca	109	#else
idinor	0:dcf3c92487ca	110	#define UL(x) x
idinor	0:dcf3c92487ca	111	#endif
idinor	0:dcf3c92487ca	112	#endif
idinor	0:dcf3c92487ca	113
idinor	0:dcf3c92487ca	114	/* The routine MD5Init initializes the message-digest context
idinor	0:dcf3c92487ca	115	mdContext. All fields are set to zero.
idinor	0:dcf3c92487ca	116	*/
idinor	0:dcf3c92487ca	117	void
idinor	0:dcf3c92487ca	118	MD5Init (MD5_CTX *mdContext)
idinor	0:dcf3c92487ca	119	{
idinor	0:dcf3c92487ca	120	mdContext->i[0] = mdContext->i[1] = (u32_t)0;
idinor	0:dcf3c92487ca	121
idinor	0:dcf3c92487ca	122	/* Load magic initialization constants. */
idinor	0:dcf3c92487ca	123	mdContext->buf[0] = (u32_t)0x67452301UL;
idinor	0:dcf3c92487ca	124	mdContext->buf[1] = (u32_t)0xefcdab89UL;
idinor	0:dcf3c92487ca	125	mdContext->buf[2] = (u32_t)0x98badcfeUL;
idinor	0:dcf3c92487ca	126	mdContext->buf[3] = (u32_t)0x10325476UL;
idinor	0:dcf3c92487ca	127	}
idinor	0:dcf3c92487ca	128
idinor	0:dcf3c92487ca	129	/* The routine MD5Update updates the message-digest context to
idinor	0:dcf3c92487ca	130	account for the presence of each of the characters inBuf[0..inLen-1]
idinor	0:dcf3c92487ca	131	in the message whose digest is being computed.
idinor	0:dcf3c92487ca	132	*/
idinor	0:dcf3c92487ca	133	void
idinor	0:dcf3c92487ca	134	MD5Update(MD5_CTX mdContext, unsigned char inBuf, unsigned int inLen)
idinor	0:dcf3c92487ca	135	{
idinor	0:dcf3c92487ca	136	u32_t in[16];
idinor	0:dcf3c92487ca	137	int mdi;
idinor	0:dcf3c92487ca	138	unsigned int i, ii;
idinor	0:dcf3c92487ca	139
idinor	0:dcf3c92487ca	140	#if 0
idinor	0:dcf3c92487ca	141	PPPDEBUG(LOG_INFO, ("MD5Update: %u:%.H\n", inLen, LWIP_MIN(inLen, 20) 2, inBuf));
idinor	0:dcf3c92487ca	142	PPPDEBUG(LOG_INFO, ("MD5Update: %u:%s\n", inLen, inBuf));
idinor	0:dcf3c92487ca	143	#endif
idinor	0:dcf3c92487ca	144
idinor	0:dcf3c92487ca	145	/* compute number of bytes mod 64 */
idinor	0:dcf3c92487ca	146	mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
idinor	0:dcf3c92487ca	147
idinor	0:dcf3c92487ca	148	/* update number of bits */
idinor	0:dcf3c92487ca	149	if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) {
idinor	0:dcf3c92487ca	150	mdContext->i[1]++;
idinor	0:dcf3c92487ca	151	}
idinor	0:dcf3c92487ca	152	mdContext->i[0] += ((u32_t)inLen << 3);
idinor	0:dcf3c92487ca	153	mdContext->i[1] += ((u32_t)inLen >> 29);
idinor	0:dcf3c92487ca	154
idinor	0:dcf3c92487ca	155	while (inLen--) {
idinor	0:dcf3c92487ca	156	/* add new character to buffer, increment mdi */
idinor	0:dcf3c92487ca	157	mdContext->in[mdi++] = *inBuf++;
idinor	0:dcf3c92487ca	158
idinor	0:dcf3c92487ca	159	/* transform if necessary */
idinor	0:dcf3c92487ca	160	if (mdi == 0x40) {
idinor	0:dcf3c92487ca	161	for (i = 0, ii = 0; i < 16; i++, ii += 4) {
idinor	0:dcf3c92487ca	162	in[i] = (((u32_t)mdContext->in[ii+3]) << 24) \|
idinor	0:dcf3c92487ca	163	(((u32_t)mdContext->in[ii+2]) << 16) \|
idinor	0:dcf3c92487ca	164	(((u32_t)mdContext->in[ii+1]) << 8) \|
idinor	0:dcf3c92487ca	165	((u32_t)mdContext->in[ii]);
idinor	0:dcf3c92487ca	166	}
idinor	0:dcf3c92487ca	167	Transform (mdContext->buf, in);
idinor	0:dcf3c92487ca	168	mdi = 0;
idinor	0:dcf3c92487ca	169	}
idinor	0:dcf3c92487ca	170	}
idinor	0:dcf3c92487ca	171	}
idinor	0:dcf3c92487ca	172
idinor	0:dcf3c92487ca	173	/* The routine MD5Final terminates the message-digest computation and
idinor	0:dcf3c92487ca	174	ends with the desired message digest in mdContext->digest[0...15].
idinor	0:dcf3c92487ca	175	*/
idinor	0:dcf3c92487ca	176	void
idinor	0:dcf3c92487ca	177	MD5Final (unsigned char hash[], MD5_CTX *mdContext)
idinor	0:dcf3c92487ca	178	{
idinor	0:dcf3c92487ca	179	u32_t in[16];
idinor	0:dcf3c92487ca	180	int mdi;
idinor	0:dcf3c92487ca	181	unsigned int i, ii;
idinor	0:dcf3c92487ca	182	unsigned int padLen;
idinor	0:dcf3c92487ca	183
idinor	0:dcf3c92487ca	184	/* save number of bits */
idinor	0:dcf3c92487ca	185	in[14] = mdContext->i[0];
idinor	0:dcf3c92487ca	186	in[15] = mdContext->i[1];
idinor	0:dcf3c92487ca	187
idinor	0:dcf3c92487ca	188	/* compute number of bytes mod 64 */
idinor	0:dcf3c92487ca	189	mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
idinor	0:dcf3c92487ca	190
idinor	0:dcf3c92487ca	191	/* pad out to 56 mod 64 */
idinor	0:dcf3c92487ca	192	padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
idinor	0:dcf3c92487ca	193	MD5Update (mdContext, PADDING, padLen);
idinor	0:dcf3c92487ca	194
idinor	0:dcf3c92487ca	195	/* append length in bits and transform */
idinor	0:dcf3c92487ca	196	for (i = 0, ii = 0; i < 14; i++, ii += 4) {
idinor	0:dcf3c92487ca	197	in[i] = (((u32_t)mdContext->in[ii+3]) << 24) \|
idinor	0:dcf3c92487ca	198	(((u32_t)mdContext->in[ii+2]) << 16) \|
idinor	0:dcf3c92487ca	199	(((u32_t)mdContext->in[ii+1]) << 8) \|
idinor	0:dcf3c92487ca	200	((u32_t)mdContext->in[ii]);
idinor	0:dcf3c92487ca	201	}
idinor	0:dcf3c92487ca	202	Transform (mdContext->buf, in);
idinor	0:dcf3c92487ca	203
idinor	0:dcf3c92487ca	204	/* store buffer in digest */
idinor	0:dcf3c92487ca	205	for (i = 0, ii = 0; i < 4; i++, ii += 4) {
idinor	0:dcf3c92487ca	206	mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
idinor	0:dcf3c92487ca	207	mdContext->digest[ii+1] =
idinor	0:dcf3c92487ca	208	(unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
idinor	0:dcf3c92487ca	209	mdContext->digest[ii+2] =
idinor	0:dcf3c92487ca	210	(unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
idinor	0:dcf3c92487ca	211	mdContext->digest[ii+3] =
idinor	0:dcf3c92487ca	212	(unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
idinor	0:dcf3c92487ca	213	}
idinor	0:dcf3c92487ca	214	SMEMCPY(hash, mdContext->digest, 16);
idinor	0:dcf3c92487ca	215	}
idinor	0:dcf3c92487ca	216
idinor	0:dcf3c92487ca	217	/* Basic MD5 step. Transforms buf based on in.
idinor	0:dcf3c92487ca	218	*/
idinor	0:dcf3c92487ca	219	static void
idinor	0:dcf3c92487ca	220	Transform (u32_t buf, u32_t in)
idinor	0:dcf3c92487ca	221	{
idinor	0:dcf3c92487ca	222	u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
idinor	0:dcf3c92487ca	223
idinor	0:dcf3c92487ca	224	/* Round 1 */
idinor	0:dcf3c92487ca	225	#define S11 7
idinor	0:dcf3c92487ca	226	#define S12 12
idinor	0:dcf3c92487ca	227	#define S13 17
idinor	0:dcf3c92487ca	228	#define S14 22
idinor	0:dcf3c92487ca	229	FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
idinor	0:dcf3c92487ca	230	FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
idinor	0:dcf3c92487ca	231	FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
idinor	0:dcf3c92487ca	232	FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
idinor	0:dcf3c92487ca	233	FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
idinor	0:dcf3c92487ca	234	FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
idinor	0:dcf3c92487ca	235	FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
idinor	0:dcf3c92487ca	236	FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
idinor	0:dcf3c92487ca	237	FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
idinor	0:dcf3c92487ca	238	FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
idinor	0:dcf3c92487ca	239	FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
idinor	0:dcf3c92487ca	240	FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
idinor	0:dcf3c92487ca	241	FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
idinor	0:dcf3c92487ca	242	FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
idinor	0:dcf3c92487ca	243	FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
idinor	0:dcf3c92487ca	244	FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
idinor	0:dcf3c92487ca	245
idinor	0:dcf3c92487ca	246	/* Round 2 */
idinor	0:dcf3c92487ca	247	#define S21 5
idinor	0:dcf3c92487ca	248	#define S22 9
idinor	0:dcf3c92487ca	249	#define S23 14
idinor	0:dcf3c92487ca	250	#define S24 20
idinor	0:dcf3c92487ca	251	GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
idinor	0:dcf3c92487ca	252	GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
idinor	0:dcf3c92487ca	253	GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
idinor	0:dcf3c92487ca	254	GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
idinor	0:dcf3c92487ca	255	GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
idinor	0:dcf3c92487ca	256	GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */
idinor	0:dcf3c92487ca	257	GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
idinor	0:dcf3c92487ca	258	GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
idinor	0:dcf3c92487ca	259	GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
idinor	0:dcf3c92487ca	260	GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
idinor	0:dcf3c92487ca	261	GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
idinor	0:dcf3c92487ca	262	GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
idinor	0:dcf3c92487ca	263	GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
idinor	0:dcf3c92487ca	264	GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
idinor	0:dcf3c92487ca	265	GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
idinor	0:dcf3c92487ca	266	GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
idinor	0:dcf3c92487ca	267
idinor	0:dcf3c92487ca	268	/* Round 3 */
idinor	0:dcf3c92487ca	269	#define S31 4
idinor	0:dcf3c92487ca	270	#define S32 11
idinor	0:dcf3c92487ca	271	#define S33 16
idinor	0:dcf3c92487ca	272	#define S34 23
idinor	0:dcf3c92487ca	273	HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
idinor	0:dcf3c92487ca	274	HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
idinor	0:dcf3c92487ca	275	HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
idinor	0:dcf3c92487ca	276	HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
idinor	0:dcf3c92487ca	277	HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
idinor	0:dcf3c92487ca	278	HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
idinor	0:dcf3c92487ca	279	HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
idinor	0:dcf3c92487ca	280	HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
idinor	0:dcf3c92487ca	281	HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
idinor	0:dcf3c92487ca	282	HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
idinor	0:dcf3c92487ca	283	HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
idinor	0:dcf3c92487ca	284	HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */
idinor	0:dcf3c92487ca	285	HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
idinor	0:dcf3c92487ca	286	HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
idinor	0:dcf3c92487ca	287	HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
idinor	0:dcf3c92487ca	288	HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
idinor	0:dcf3c92487ca	289
idinor	0:dcf3c92487ca	290	/* Round 4 */
idinor	0:dcf3c92487ca	291	#define S41 6
idinor	0:dcf3c92487ca	292	#define S42 10
idinor	0:dcf3c92487ca	293	#define S43 15
idinor	0:dcf3c92487ca	294	#define S44 21
idinor	0:dcf3c92487ca	295	II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
idinor	0:dcf3c92487ca	296	II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
idinor	0:dcf3c92487ca	297	II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
idinor	0:dcf3c92487ca	298	II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
idinor	0:dcf3c92487ca	299	II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
idinor	0:dcf3c92487ca	300	II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
idinor	0:dcf3c92487ca	301	II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
idinor	0:dcf3c92487ca	302	II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
idinor	0:dcf3c92487ca	303	II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
idinor	0:dcf3c92487ca	304	II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
idinor	0:dcf3c92487ca	305	II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
idinor	0:dcf3c92487ca	306	II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
idinor	0:dcf3c92487ca	307	II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
idinor	0:dcf3c92487ca	308	II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
idinor	0:dcf3c92487ca	309	II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
idinor	0:dcf3c92487ca	310	II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
idinor	0:dcf3c92487ca	311
idinor	0:dcf3c92487ca	312	buf[0] += a;
idinor	0:dcf3c92487ca	313	buf[1] += b;
idinor	0:dcf3c92487ca	314	buf[2] += c;
idinor	0:dcf3c92487ca	315	buf[3] += d;
idinor	0:dcf3c92487ca	316	}
idinor	0:dcf3c92487ca	317
idinor	0:dcf3c92487ca	318	#endif /* CHAP_SUPPORT \|\| MD5_SUPPORT */
idinor	0:dcf3c92487ca	319
idinor	0:dcf3c92487ca	320	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	20 Jul 2011
Imports:	35
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	1

lwip/netif/ppp/md5.c@0:dcf3c92487ca, 2011-07-20 (annotated)

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