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NetStack/lwip/netif/ppp/md5.c@0:1a61c61d0845, 2012-04-03 (annotated)

Committer:: dcoban
Date:: Tue Apr 03 18:43:13 2012 +0000
Revision:: 0:1a61c61d0845

Who changed what in which revision?

User	Revision	Line number	New contents of line
dcoban	0:1a61c61d0845	1	/*
dcoban	0:1a61c61d0845	2	***********************************************************************
dcoban	0:1a61c61d0845	3	md5.c -- the source code for MD5 routines
dcoban	0:1a61c61d0845	4	RSA Data Security, Inc. MD5 Message-Digest Algorithm
dcoban	0:1a61c61d0845	5	Created: 2/17/90 RLR
dcoban	0:1a61c61d0845	6	Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr.
dcoban	0:1a61c61d0845	7	***********************************************************************
dcoban	0:1a61c61d0845	8	*/
dcoban	0:1a61c61d0845	9
dcoban	0:1a61c61d0845	10	/*
dcoban	0:1a61c61d0845	11	***********************************************************************
dcoban	0:1a61c61d0845	12	Copyright (C) 1990, RSA Data Security, Inc. All rights reserved.
dcoban	0:1a61c61d0845	13
dcoban	0:1a61c61d0845	14	License to copy and use this software is granted provided that
dcoban	0:1a61c61d0845	15	it is identified as the "RSA Data Security, Inc. MD5 Message-
dcoban	0:1a61c61d0845	16	Digest Algorithm" in all material mentioning or referencing this
dcoban	0:1a61c61d0845	17	software or this function.
dcoban	0:1a61c61d0845	18
dcoban	0:1a61c61d0845	19	License is also granted to make and use derivative works
dcoban	0:1a61c61d0845	20	provided that such works are identified as "derived from the RSA
dcoban	0:1a61c61d0845	21	Data Security, Inc. MD5 Message-Digest Algorithm" in all
dcoban	0:1a61c61d0845	22	material mentioning or referencing the derived work.
dcoban	0:1a61c61d0845	23
dcoban	0:1a61c61d0845	24	RSA Data Security, Inc. makes no representations concerning
dcoban	0:1a61c61d0845	25	either the merchantability of this software or the suitability
dcoban	0:1a61c61d0845	26	of this software for any particular purpose. It is provided "as
dcoban	0:1a61c61d0845	27	is" without express or implied warranty of any kind.
dcoban	0:1a61c61d0845	28
dcoban	0:1a61c61d0845	29	These notices must be retained in any copies of any part of this
dcoban	0:1a61c61d0845	30	documentation and/or software.
dcoban	0:1a61c61d0845	31	***********************************************************************
dcoban	0:1a61c61d0845	32	*/
dcoban	0:1a61c61d0845	33
dcoban	0:1a61c61d0845	34	#include "lwip/opt.h"
dcoban	0:1a61c61d0845	35
dcoban	0:1a61c61d0845	36	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
dcoban	0:1a61c61d0845	37
dcoban	0:1a61c61d0845	38	#if CHAP_SUPPORT \|\| MD5_SUPPORT
dcoban	0:1a61c61d0845	39
dcoban	0:1a61c61d0845	40	#include "ppp.h"
dcoban	0:1a61c61d0845	41	#include "pppdebug.h"
dcoban	0:1a61c61d0845	42
dcoban	0:1a61c61d0845	43	#include "md5.h"
dcoban	0:1a61c61d0845	44
dcoban	0:1a61c61d0845	45	#include <string.h>
dcoban	0:1a61c61d0845	46
dcoban	0:1a61c61d0845	47	/*
dcoban	0:1a61c61d0845	48	***********************************************************************
dcoban	0:1a61c61d0845	49	Message-digest routines:
dcoban	0:1a61c61d0845	50	To form the message digest for a message M
dcoban	0:1a61c61d0845	51	(1) Initialize a context buffer mdContext using MD5Init
dcoban	0:1a61c61d0845	52	(2) Call MD5Update on mdContext and M
dcoban	0:1a61c61d0845	53	(3) Call MD5Final on mdContext
dcoban	0:1a61c61d0845	54	The message digest is now in mdContext->digest[0...15]
dcoban	0:1a61c61d0845	55	***********************************************************************
dcoban	0:1a61c61d0845	56	*/
dcoban	0:1a61c61d0845	57
dcoban	0:1a61c61d0845	58	/* forward declaration */
dcoban	0:1a61c61d0845	59	static void Transform (u32_t buf, u32_t in);
dcoban	0:1a61c61d0845	60
dcoban	0:1a61c61d0845	61	static unsigned char PADDING[64] = {
dcoban	0:1a61c61d0845	62	0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
dcoban	0:1a61c61d0845	63	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
dcoban	0:1a61c61d0845	64	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
dcoban	0:1a61c61d0845	65	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
dcoban	0:1a61c61d0845	66	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
dcoban	0:1a61c61d0845	67	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
dcoban	0:1a61c61d0845	68	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
dcoban	0:1a61c61d0845	69	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
dcoban	0:1a61c61d0845	70	};
dcoban	0:1a61c61d0845	71
dcoban	0:1a61c61d0845	72	/* F, G, H and I are basic MD5 functions */
dcoban	0:1a61c61d0845	73	#define F(x, y, z) (((x) & (y)) \| ((~x) & (z)))
dcoban	0:1a61c61d0845	74	#define G(x, y, z) (((x) & (z)) \| ((y) & (~z)))
dcoban	0:1a61c61d0845	75	#define H(x, y, z) ((x) ^ (y) ^ (z))
dcoban	0:1a61c61d0845	76	#define I(x, y, z) ((y) ^ ((x) \| (~z)))
dcoban	0:1a61c61d0845	77
dcoban	0:1a61c61d0845	78	/* ROTATE_LEFT rotates x left n bits */
dcoban	0:1a61c61d0845	79	#define ROTATE_LEFT(x, n) (((x) << (n)) \| ((x) >> (32-(n))))
dcoban	0:1a61c61d0845	80
dcoban	0:1a61c61d0845	81	/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
dcoban	0:1a61c61d0845	82	/* Rotation is separate from addition to prevent recomputation */
dcoban	0:1a61c61d0845	83	#define FF(a, b, c, d, x, s, ac) \
dcoban	0:1a61c61d0845	84	{(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \
dcoban	0:1a61c61d0845	85	(a) = ROTATE_LEFT ((a), (s)); \
dcoban	0:1a61c61d0845	86	(a) += (b); \
dcoban	0:1a61c61d0845	87	}
dcoban	0:1a61c61d0845	88	#define GG(a, b, c, d, x, s, ac) \
dcoban	0:1a61c61d0845	89	{(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \
dcoban	0:1a61c61d0845	90	(a) = ROTATE_LEFT ((a), (s)); \
dcoban	0:1a61c61d0845	91	(a) += (b); \
dcoban	0:1a61c61d0845	92	}
dcoban	0:1a61c61d0845	93	#define HH(a, b, c, d, x, s, ac) \
dcoban	0:1a61c61d0845	94	{(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \
dcoban	0:1a61c61d0845	95	(a) = ROTATE_LEFT ((a), (s)); \
dcoban	0:1a61c61d0845	96	(a) += (b); \
dcoban	0:1a61c61d0845	97	}
dcoban	0:1a61c61d0845	98	#define II(a, b, c, d, x, s, ac) \
dcoban	0:1a61c61d0845	99	{(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \
dcoban	0:1a61c61d0845	100	(a) = ROTATE_LEFT ((a), (s)); \
dcoban	0:1a61c61d0845	101	(a) += (b); \
dcoban	0:1a61c61d0845	102	}
dcoban	0:1a61c61d0845	103
dcoban	0:1a61c61d0845	104	#ifdef __STDC__
dcoban	0:1a61c61d0845	105	#define UL(x) x##UL
dcoban	0:1a61c61d0845	106	#else
dcoban	0:1a61c61d0845	107	#ifdef WIN32
dcoban	0:1a61c61d0845	108	#define UL(x) x##UL
dcoban	0:1a61c61d0845	109	#else
dcoban	0:1a61c61d0845	110	#define UL(x) x
dcoban	0:1a61c61d0845	111	#endif
dcoban	0:1a61c61d0845	112	#endif
dcoban	0:1a61c61d0845	113
dcoban	0:1a61c61d0845	114	/* The routine MD5Init initializes the message-digest context
dcoban	0:1a61c61d0845	115	mdContext. All fields are set to zero.
dcoban	0:1a61c61d0845	116	*/
dcoban	0:1a61c61d0845	117	void
dcoban	0:1a61c61d0845	118	MD5Init (MD5_CTX *mdContext)
dcoban	0:1a61c61d0845	119	{
dcoban	0:1a61c61d0845	120	mdContext->i[0] = mdContext->i[1] = (u32_t)0;
dcoban	0:1a61c61d0845	121
dcoban	0:1a61c61d0845	122	/* Load magic initialization constants. */
dcoban	0:1a61c61d0845	123	mdContext->buf[0] = (u32_t)0x67452301UL;
dcoban	0:1a61c61d0845	124	mdContext->buf[1] = (u32_t)0xefcdab89UL;
dcoban	0:1a61c61d0845	125	mdContext->buf[2] = (u32_t)0x98badcfeUL;
dcoban	0:1a61c61d0845	126	mdContext->buf[3] = (u32_t)0x10325476UL;
dcoban	0:1a61c61d0845	127	}
dcoban	0:1a61c61d0845	128
dcoban	0:1a61c61d0845	129	/* The routine MD5Update updates the message-digest context to
dcoban	0:1a61c61d0845	130	account for the presence of each of the characters inBuf[0..inLen-1]
dcoban	0:1a61c61d0845	131	in the message whose digest is being computed.
dcoban	0:1a61c61d0845	132	*/
dcoban	0:1a61c61d0845	133	void
dcoban	0:1a61c61d0845	134	MD5Update(MD5_CTX mdContext, unsigned char inBuf, unsigned int inLen)
dcoban	0:1a61c61d0845	135	{
dcoban	0:1a61c61d0845	136	u32_t in[16];
dcoban	0:1a61c61d0845	137	int mdi;
dcoban	0:1a61c61d0845	138	unsigned int i, ii;
dcoban	0:1a61c61d0845	139
dcoban	0:1a61c61d0845	140	#if 0
dcoban	0:1a61c61d0845	141	PPPDEBUG(LOG_INFO, ("MD5Update: %u:%.H\n", inLen, LWIP_MIN(inLen, 20) 2, inBuf));
dcoban	0:1a61c61d0845	142	PPPDEBUG(LOG_INFO, ("MD5Update: %u:%s\n", inLen, inBuf));
dcoban	0:1a61c61d0845	143	#endif
dcoban	0:1a61c61d0845	144
dcoban	0:1a61c61d0845	145	/* compute number of bytes mod 64 */
dcoban	0:1a61c61d0845	146	mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
dcoban	0:1a61c61d0845	147
dcoban	0:1a61c61d0845	148	/* update number of bits */
dcoban	0:1a61c61d0845	149	if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) {
dcoban	0:1a61c61d0845	150	mdContext->i[1]++;
dcoban	0:1a61c61d0845	151	}
dcoban	0:1a61c61d0845	152	mdContext->i[0] += ((u32_t)inLen << 3);
dcoban	0:1a61c61d0845	153	mdContext->i[1] += ((u32_t)inLen >> 29);
dcoban	0:1a61c61d0845	154
dcoban	0:1a61c61d0845	155	while (inLen--) {
dcoban	0:1a61c61d0845	156	/* add new character to buffer, increment mdi */
dcoban	0:1a61c61d0845	157	mdContext->in[mdi++] = *inBuf++;
dcoban	0:1a61c61d0845	158
dcoban	0:1a61c61d0845	159	/* transform if necessary */
dcoban	0:1a61c61d0845	160	if (mdi == 0x40) {
dcoban	0:1a61c61d0845	161	for (i = 0, ii = 0; i < 16; i++, ii += 4) {
dcoban	0:1a61c61d0845	162	in[i] = (((u32_t)mdContext->in[ii+3]) << 24) \|
dcoban	0:1a61c61d0845	163	(((u32_t)mdContext->in[ii+2]) << 16) \|
dcoban	0:1a61c61d0845	164	(((u32_t)mdContext->in[ii+1]) << 8) \|
dcoban	0:1a61c61d0845	165	((u32_t)mdContext->in[ii]);
dcoban	0:1a61c61d0845	166	}
dcoban	0:1a61c61d0845	167	Transform (mdContext->buf, in);
dcoban	0:1a61c61d0845	168	mdi = 0;
dcoban	0:1a61c61d0845	169	}
dcoban	0:1a61c61d0845	170	}
dcoban	0:1a61c61d0845	171	}
dcoban	0:1a61c61d0845	172
dcoban	0:1a61c61d0845	173	/* The routine MD5Final terminates the message-digest computation and
dcoban	0:1a61c61d0845	174	ends with the desired message digest in mdContext->digest[0...15].
dcoban	0:1a61c61d0845	175	*/
dcoban	0:1a61c61d0845	176	void
dcoban	0:1a61c61d0845	177	MD5Final (unsigned char hash[], MD5_CTX *mdContext)
dcoban	0:1a61c61d0845	178	{
dcoban	0:1a61c61d0845	179	u32_t in[16];
dcoban	0:1a61c61d0845	180	int mdi;
dcoban	0:1a61c61d0845	181	unsigned int i, ii;
dcoban	0:1a61c61d0845	182	unsigned int padLen;
dcoban	0:1a61c61d0845	183
dcoban	0:1a61c61d0845	184	/* save number of bits */
dcoban	0:1a61c61d0845	185	in[14] = mdContext->i[0];
dcoban	0:1a61c61d0845	186	in[15] = mdContext->i[1];
dcoban	0:1a61c61d0845	187
dcoban	0:1a61c61d0845	188	/* compute number of bytes mod 64 */
dcoban	0:1a61c61d0845	189	mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
dcoban	0:1a61c61d0845	190
dcoban	0:1a61c61d0845	191	/* pad out to 56 mod 64 */
dcoban	0:1a61c61d0845	192	padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
dcoban	0:1a61c61d0845	193	MD5Update (mdContext, PADDING, padLen);
dcoban	0:1a61c61d0845	194
dcoban	0:1a61c61d0845	195	/* append length in bits and transform */
dcoban	0:1a61c61d0845	196	for (i = 0, ii = 0; i < 14; i++, ii += 4) {
dcoban	0:1a61c61d0845	197	in[i] = (((u32_t)mdContext->in[ii+3]) << 24) \|
dcoban	0:1a61c61d0845	198	(((u32_t)mdContext->in[ii+2]) << 16) \|
dcoban	0:1a61c61d0845	199	(((u32_t)mdContext->in[ii+1]) << 8) \|
dcoban	0:1a61c61d0845	200	((u32_t)mdContext->in[ii]);
dcoban	0:1a61c61d0845	201	}
dcoban	0:1a61c61d0845	202	Transform (mdContext->buf, in);
dcoban	0:1a61c61d0845	203
dcoban	0:1a61c61d0845	204	/* store buffer in digest */
dcoban	0:1a61c61d0845	205	for (i = 0, ii = 0; i < 4; i++, ii += 4) {
dcoban	0:1a61c61d0845	206	mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
dcoban	0:1a61c61d0845	207	mdContext->digest[ii+1] =
dcoban	0:1a61c61d0845	208	(unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
dcoban	0:1a61c61d0845	209	mdContext->digest[ii+2] =
dcoban	0:1a61c61d0845	210	(unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
dcoban	0:1a61c61d0845	211	mdContext->digest[ii+3] =
dcoban	0:1a61c61d0845	212	(unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
dcoban	0:1a61c61d0845	213	}
dcoban	0:1a61c61d0845	214	SMEMCPY(hash, mdContext->digest, 16);
dcoban	0:1a61c61d0845	215	}
dcoban	0:1a61c61d0845	216
dcoban	0:1a61c61d0845	217	/* Basic MD5 step. Transforms buf based on in.
dcoban	0:1a61c61d0845	218	*/
dcoban	0:1a61c61d0845	219	static void
dcoban	0:1a61c61d0845	220	Transform (u32_t buf, u32_t in)
dcoban	0:1a61c61d0845	221	{
dcoban	0:1a61c61d0845	222	u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
dcoban	0:1a61c61d0845	223
dcoban	0:1a61c61d0845	224	/* Round 1 */
dcoban	0:1a61c61d0845	225	#define S11 7
dcoban	0:1a61c61d0845	226	#define S12 12
dcoban	0:1a61c61d0845	227	#define S13 17
dcoban	0:1a61c61d0845	228	#define S14 22
dcoban	0:1a61c61d0845	229	FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
dcoban	0:1a61c61d0845	230	FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
dcoban	0:1a61c61d0845	231	FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
dcoban	0:1a61c61d0845	232	FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
dcoban	0:1a61c61d0845	233	FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
dcoban	0:1a61c61d0845	234	FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
dcoban	0:1a61c61d0845	235	FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
dcoban	0:1a61c61d0845	236	FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
dcoban	0:1a61c61d0845	237	FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
dcoban	0:1a61c61d0845	238	FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
dcoban	0:1a61c61d0845	239	FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
dcoban	0:1a61c61d0845	240	FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
dcoban	0:1a61c61d0845	241	FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
dcoban	0:1a61c61d0845	242	FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
dcoban	0:1a61c61d0845	243	FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
dcoban	0:1a61c61d0845	244	FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
dcoban	0:1a61c61d0845	245
dcoban	0:1a61c61d0845	246	/* Round 2 */
dcoban	0:1a61c61d0845	247	#define S21 5
dcoban	0:1a61c61d0845	248	#define S22 9
dcoban	0:1a61c61d0845	249	#define S23 14
dcoban	0:1a61c61d0845	250	#define S24 20
dcoban	0:1a61c61d0845	251	GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
dcoban	0:1a61c61d0845	252	GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
dcoban	0:1a61c61d0845	253	GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
dcoban	0:1a61c61d0845	254	GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
dcoban	0:1a61c61d0845	255	GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
dcoban	0:1a61c61d0845	256	GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */
dcoban	0:1a61c61d0845	257	GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
dcoban	0:1a61c61d0845	258	GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
dcoban	0:1a61c61d0845	259	GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
dcoban	0:1a61c61d0845	260	GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
dcoban	0:1a61c61d0845	261	GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
dcoban	0:1a61c61d0845	262	GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
dcoban	0:1a61c61d0845	263	GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
dcoban	0:1a61c61d0845	264	GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
dcoban	0:1a61c61d0845	265	GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
dcoban	0:1a61c61d0845	266	GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
dcoban	0:1a61c61d0845	267
dcoban	0:1a61c61d0845	268	/* Round 3 */
dcoban	0:1a61c61d0845	269	#define S31 4
dcoban	0:1a61c61d0845	270	#define S32 11
dcoban	0:1a61c61d0845	271	#define S33 16
dcoban	0:1a61c61d0845	272	#define S34 23
dcoban	0:1a61c61d0845	273	HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
dcoban	0:1a61c61d0845	274	HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
dcoban	0:1a61c61d0845	275	HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
dcoban	0:1a61c61d0845	276	HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
dcoban	0:1a61c61d0845	277	HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
dcoban	0:1a61c61d0845	278	HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
dcoban	0:1a61c61d0845	279	HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
dcoban	0:1a61c61d0845	280	HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
dcoban	0:1a61c61d0845	281	HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
dcoban	0:1a61c61d0845	282	HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
dcoban	0:1a61c61d0845	283	HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
dcoban	0:1a61c61d0845	284	HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */
dcoban	0:1a61c61d0845	285	HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
dcoban	0:1a61c61d0845	286	HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
dcoban	0:1a61c61d0845	287	HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
dcoban	0:1a61c61d0845	288	HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
dcoban	0:1a61c61d0845	289
dcoban	0:1a61c61d0845	290	/* Round 4 */
dcoban	0:1a61c61d0845	291	#define S41 6
dcoban	0:1a61c61d0845	292	#define S42 10
dcoban	0:1a61c61d0845	293	#define S43 15
dcoban	0:1a61c61d0845	294	#define S44 21
dcoban	0:1a61c61d0845	295	II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
dcoban	0:1a61c61d0845	296	II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
dcoban	0:1a61c61d0845	297	II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
dcoban	0:1a61c61d0845	298	II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
dcoban	0:1a61c61d0845	299	II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
dcoban	0:1a61c61d0845	300	II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
dcoban	0:1a61c61d0845	301	II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
dcoban	0:1a61c61d0845	302	II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
dcoban	0:1a61c61d0845	303	II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
dcoban	0:1a61c61d0845	304	II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
dcoban	0:1a61c61d0845	305	II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
dcoban	0:1a61c61d0845	306	II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
dcoban	0:1a61c61d0845	307	II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
dcoban	0:1a61c61d0845	308	II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
dcoban	0:1a61c61d0845	309	II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
dcoban	0:1a61c61d0845	310	II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
dcoban	0:1a61c61d0845	311
dcoban	0:1a61c61d0845	312	buf[0] += a;
dcoban	0:1a61c61d0845	313	buf[1] += b;
dcoban	0:1a61c61d0845	314	buf[2] += c;
dcoban	0:1a61c61d0845	315	buf[3] += d;
dcoban	0:1a61c61d0845	316	}
dcoban	0:1a61c61d0845	317
dcoban	0:1a61c61d0845	318	#endif /* CHAP_SUPPORT \|\| MD5_SUPPORT */
dcoban	0:1a61c61d0845	319
dcoban	0:1a61c61d0845	320	#endif /* PPP_SUPPORT */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	03 Apr 2012
Imports:	2
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	4
Followers:	1

NetStack/lwip/netif/ppp/md5.c@0:1a61c61d0845, 2012-04-03 (annotated)

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