Hi Team,
There's an issue from the customer need your help:
One address of C2000 series chips is 16 bits. In the MD5 algorithm library provided by the system, the input data type is unsigned char type. If the provided interface md5_process is used for MD5 calculation, when the data is combined into u32 type, the data There will be errors in the combination. Is there any other algorithm library that can support C2000 series chips to calculate MD5?
/*
* RFC 1321 compliant MD5 implementation
*
* Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
*
* Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the names of PolarSSL or XySSL 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 COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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.
*/
/*
* The MD5 algorithm was designed by Ron Rivest in 1991.
*
* http://www.ietf.org/rfc/rfc1321.txt
*/
#include "netif/ppp/ppp_opts.h"
#if PPP_SUPPORT && LWIP_INCLUDED_POLARSSL_MD5
#include "netif/ppp/polarssl/md5.h"
#include <string.h>
/*
* 32-bit integer manipulation macros (little endian)
*/
#ifndef GET_ULONG_LE
#define GET_ULONG_LE(n,b,i) \
{ \
(n) = ( (unsigned long) (b)[(i) ] ) \
| ( (unsigned long) (b)[(i) + 1] << 8 ) \
| ( (unsigned long) (b)[(i) + 2] << 16 ) \
| ( (unsigned long) (b)[(i) + 3] << 24 ); \
}
#endif
#ifndef PUT_ULONG_LE
#define PUT_ULONG_LE(n,b,i) \
{ \
(b)[(i) ] = (unsigned char) ( (n) ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 3] = (unsigned char) ( (n) >> 24 ); \
}
#endif
/*
* MD5 context setup
*/
void md5_starts( md5_context *ctx )
{
ctx->total[0] = 0;
ctx->total[1] = 0;
ctx->state[0] = 0x67452301;
ctx->state[1] = 0xEFCDAB89;
ctx->state[2] = 0x98BADCFE;
ctx->state[3] = 0x10325476;
}
static void md5_process( md5_context *ctx, const unsigned char data[64] )
{
unsigned long X[16], A, B, C, D;
GET_ULONG_LE( X[ 0], data, 0 );
GET_ULONG_LE( X[ 1], data, 4 );
GET_ULONG_LE( X[ 2], data, 8 );
GET_ULONG_LE( X[ 3], data, 12 );
GET_ULONG_LE( X[ 4], data, 16 );
GET_ULONG_LE( X[ 5], data, 20 );
GET_ULONG_LE( X[ 6], data, 24 );
GET_ULONG_LE( X[ 7], data, 28 );
GET_ULONG_LE( X[ 8], data, 32 );
GET_ULONG_LE( X[ 9], data, 36 );
GET_ULONG_LE( X[10], data, 40 );
GET_ULONG_LE( X[11], data, 44 );
GET_ULONG_LE( X[12], data, 48 );
GET_ULONG_LE( X[13], data, 52 );
GET_ULONG_LE( X[14], data, 56 );
GET_ULONG_LE( X[15], data, 60 );
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
#define P(a,b,c,d,k,s,t) \
{ \
a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \
}
A = ctx->state[0];
B = ctx->state[1];
C = ctx->state[2];
D = ctx->state[3];
#define F(x,y,z) (z ^ (x & (y ^ z)))
P( A, B, C, D, 0, 7, 0xD76AA478 );
P( D, A, B, C, 1, 12, 0xE8C7B756 );
P( C, D, A, B, 2, 17, 0x242070DB );
P( B, C, D, A, 3, 22, 0xC1BDCEEE );
P( A, B, C, D, 4, 7, 0xF57C0FAF );
P( D, A, B, C, 5, 12, 0x4787C62A );
P( C, D, A, B, 6, 17, 0xA8304613 );
P( B, C, D, A, 7, 22, 0xFD469501 );
P( A, B, C, D, 8, 7, 0x698098D8 );
P( D, A, B, C, 9, 12, 0x8B44F7AF );
P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
P( B, C, D, A, 11, 22, 0x895CD7BE );
P( A, B, C, D, 12, 7, 0x6B901122 );
P( D, A, B, C, 13, 12, 0xFD987193 );
P( C, D, A, B, 14, 17, 0xA679438E );
P( B, C, D, A, 15, 22, 0x49B40821 );
#undef F
#define F(x,y,z) (y ^ (z & (x ^ y)))
P( A, B, C, D, 1, 5, 0xF61E2562 );
P( D, A, B, C, 6, 9, 0xC040B340 );
P( C, D, A, B, 11, 14, 0x265E5A51 );
P( B, C, D, A, 0, 20, 0xE9B6C7AA );
P( A, B, C, D, 5, 5, 0xD62F105D );
P( D, A, B, C, 10, 9, 0x02441453 );
P( C, D, A, B, 15, 14, 0xD8A1E681 );
P( B, C, D, A, 4, 20, 0xE7D3FBC8 );
P( A, B, C, D, 9, 5, 0x21E1CDE6 );
P( D, A, B, C, 14, 9, 0xC33707D6 );
P( C, D, A, B, 3, 14, 0xF4D50D87 );
P( B, C, D, A, 8, 20, 0x455A14ED );
P( A, B, C, D, 13, 5, 0xA9E3E905 );
P( D, A, B, C, 2, 9, 0xFCEFA3F8 );
P( C, D, A, B, 7, 14, 0x676F02D9 );
P( B, C, D, A, 12, 20, 0x8D2A4C8A );
#undef F
#define F(x,y,z) (x ^ y ^ z)
P( A, B, C, D, 5, 4, 0xFFFA3942 );
P( D, A, B, C, 8, 11, 0x8771F681 );
P( C, D, A, B, 11, 16, 0x6D9D6122 );
P( B, C, D, A, 14, 23, 0xFDE5380C );
P( A, B, C, D, 1, 4, 0xA4BEEA44 );
P( D, A, B, C, 4, 11, 0x4BDECFA9 );
P( C, D, A, B, 7, 16, 0xF6BB4B60 );
P( B, C, D, A, 10, 23, 0xBEBFBC70 );
P( A, B, C, D, 13, 4, 0x289B7EC6 );
P( D, A, B, C, 0, 11, 0xEAA127FA );
P( C, D, A, B, 3, 16, 0xD4EF3085 );
P( B, C, D, A, 6, 23, 0x04881D05 );
P( A, B, C, D, 9, 4, 0xD9D4D039 );
P( D, A, B, C, 12, 11, 0xE6DB99E5 );
P( C, D, A, B, 15, 16, 0x1FA27CF8 );
P( B, C, D, A, 2, 23, 0xC4AC5665 );
#undef F
#define F(x,y,z) (y ^ (x | ~z))
P( A, B, C, D, 0, 6, 0xF4292244 );
P( D, A, B, C, 7, 10, 0x432AFF97 );
P( C, D, A, B, 14, 15, 0xAB9423A7 );
P( B, C, D, A, 5, 21, 0xFC93A039 );
P( A, B, C, D, 12, 6, 0x655B59C3 );
P( D, A, B, C, 3, 10, 0x8F0CCC92 );
P( C, D, A, B, 10, 15, 0xFFEFF47D );
P( B, C, D, A, 1, 21, 0x85845DD1 );
P( A, B, C, D, 8, 6, 0x6FA87E4F );
P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
P( C, D, A, B, 6, 15, 0xA3014314 );
P( B, C, D, A, 13, 21, 0x4E0811A1 );
P( A, B, C, D, 4, 6, 0xF7537E82 );
P( D, A, B, C, 11, 10, 0xBD3AF235 );
P( C, D, A, B, 2, 15, 0x2AD7D2BB );
P( B, C, D, A, 9, 21, 0xEB86D391 );
#undef F
ctx->state[0] += A;
ctx->state[1] += B;
ctx->state[2] += C;
ctx->state[3] += D;
}
/*
* MD5 process buffer
*/
void md5_update( md5_context *ctx, const unsigned char *input, int ilen )
{
int fill;
unsigned long left;
if( ilen <= 0 )
return;
left = ctx->total[0] & 0x3F;
fill = 64 - left;
ctx->total[0] += ilen;
ctx->total[0] &= 0xFFFFFFFF;
if( ctx->total[0] < (unsigned long) ilen )
ctx->total[1]++;
if( left && ilen >= fill )
{
MEMCPY( (void *) (ctx->buffer + left),
input, fill );
md5_process( ctx, ctx->buffer );
input += fill;
ilen -= fill;
left = 0;
}
while( ilen >= 64 )
{
md5_process( ctx, input );
input += 64;
ilen -= 64;
}
if( ilen > 0 )
{
MEMCPY( (void *) (ctx->buffer + left),
input, ilen );
}
}
static const unsigned char md5_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
};
/*
* MD5 final digest
*/
void md5_finish( md5_context *ctx, unsigned char output[16] )
{
unsigned long last, padn;
unsigned long high, low;
unsigned char msglen[8];
high = ( ctx->total[0] >> 29 )
| ( ctx->total[1] << 3 );
low = ( ctx->total[0] << 3 );
PUT_ULONG_LE( low, msglen, 0 );
PUT_ULONG_LE( high, msglen, 4 );
last = ctx->total[0] & 0x3F;
padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
md5_update( ctx, md5_padding, padn );
md5_update( ctx, msglen, 8 );
PUT_ULONG_LE( ctx->state[0], output, 0 );
PUT_ULONG_LE( ctx->state[1], output, 4 );
PUT_ULONG_LE( ctx->state[2], output, 8 );
PUT_ULONG_LE( ctx->state[3], output, 12 );
}
/*
* output = MD5( input buffer )
*/
void md5( unsigned char *input, int ilen, unsigned char output[16] )
{
md5_context ctx;
md5_starts( &ctx );
md5_update( &ctx, input, ilen );
md5_finish( &ctx, output );
}
#endif /* PPP_SUPPORT && LWIP_INCLUDED_POLARSSL_MD5 */
Best Regards,
Ben
