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- Changed ARC4 to use seperate input/output buffer

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This commit is contained in:
Paul Bakker 2010-03-21 15:42:15 +00:00
parent f3ccc68100
commit baad6504d4
6 changed files with 30 additions and 21 deletions
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3
ChangeLog
View File

@ -1,6 +1,6 @@
PolarSSL ChangeLog
= Version 0.12.2 released on XXXXXXXX
= Version 0.13.0 released on XXXXXXXX
Features
* Added option parsing for host and port selection to
ssl_client2
@ -15,6 +15,7 @@ Changes
in a function to allow easy future expansion
* Changed symmetric cipher functions to
identical interface (returning int result values)
* Changed ARC4 to use seperate input/output buffer
Bug fixes
* Fixed bug resulting in failure to send the last

8
include/polarssl/arc4.h
View File

@ -51,12 +51,14 @@ void arc4_setup( arc4_context *ctx, const unsigned char *key, int keylen );
* \brief ARC4 cipher function
*
* \param ctx ARC4 context
* \param buf buffer to be processed
* \param buflen amount of data in buf
* \param length length of the input data
* \param input buffer holding the input data
* \param output buffer for the output data
*
* \return 0
*/
int arc4_crypt( arc4_context *ctx, unsigned char *buf, int buflen );
int arc4_crypt( arc4_context *ctx, int length, const unsigned char *input,
unsigned char *output );
/*
* \brief Checkup routine

18
library/arc4.c
View File

@ -63,7 +63,8 @@ void arc4_setup( arc4_context *ctx, const unsigned char *key, int keylen )
/*
* ARC4 cipher function
*/
int arc4_crypt( arc4_context *ctx, unsigned char *buf, int buflen )
int arc4_crypt( arc4_context *ctx, int length, const unsigned char *input,
unsigned char *output )
{
int i, x, y, a, b;
unsigned char *m;
@ -72,7 +73,7 @@ int arc4_crypt( arc4_context *ctx, unsigned char *buf, int buflen )
y = ctx->y;
m = ctx->m;
for( i = 0; i < buflen; i++ )
for( i = 0; i < length; i++ )
{
x = ( x + 1 ) & 0xFF; a = m[x];
y = ( y + a ) & 0xFF; b = m[y];
@ -80,8 +81,8 @@ int arc4_crypt( arc4_context *ctx, unsigned char *buf, int buflen )
m[x] = (unsigned char) b;
m[y] = (unsigned char) a;
buf[i] = (unsigned char)
( buf[i] ^ m[(unsigned char)( a + b )] );
output[i] = (unsigned char)
( input[i] ^ m[(unsigned char)( a + b )] );
}
ctx->x = x;
@ -127,7 +128,8 @@ static const unsigned char arc4_test_ct[3][8] =
int arc4_self_test( int verbose )
{
int i;
unsigned char buf[8];
unsigned char ibuf[8];
unsigned char obuf[8];
arc4_context ctx;
for( i = 0; i < 3; i++ )
@ -135,12 +137,12 @@ int arc4_self_test( int verbose )
if( verbose != 0 )
printf( " ARC4 test #%d: ", i + 1 );
memcpy( buf, arc4_test_pt[i], 8 );
memcpy( ibuf, arc4_test_pt[i], 8 );
arc4_setup( &ctx, (unsigned char *) arc4_test_key[i], 8 );
arc4_crypt( &ctx, buf, 8 );
arc4_crypt( &ctx, 8, ibuf, obuf );
if( memcmp( buf, arc4_test_ct[i], 8 ) != 0 )
if( memcmp( obuf, arc4_test_ct[i], 8 ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );

6
library/ssl_tls.c
View File

@ -531,7 +531,8 @@ static int ssl_encrypt_buf( ssl_context *ssl )
ssl->out_msg, ssl->out_msglen );
arc4_crypt( (arc4_context *) ssl->ctx_enc,
ssl->out_msg, ssl->out_msglen );
ssl->out_msglen, ssl->out_msg,
ssl->out_msg );
#else
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
#endif
@ -618,7 +619,8 @@ static int ssl_decrypt_buf( ssl_context *ssl )
#if defined(POLARSSL_ARC4_C)
padlen = 0;
arc4_crypt( (arc4_context *) ssl->ctx_dec,
ssl->in_msg, ssl->in_msglen );
ssl->in_msglen, ssl->in_msg,
ssl->in_msg );
#else
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
#endif

4
programs/test/benchmark.c
View File

@ -169,11 +169,11 @@ int main( void )
set_alarm( 1 );
for( i = 1; ! alarmed; i++ )
arc4_crypt( &arc4, buf, BUFSIZE );
arc4_crypt( &arc4, BUFSIZE, buf, buf );
tsc = hardclock();
for( j = 0; j < 1024; j++ )
arc4_crypt( &arc4, buf, BUFSIZE );
arc4_crypt( &arc4, BUFSIZE, buf, buf );
printf( "%9lu Kb/s, %9lu cycles/byte\n", i * BUFSIZE / 1024,
( hardclock() - tsc ) / ( j * BUFSIZE ) );

12
tests/suites/test_suite_arc4.function
View File

@ -7,22 +7,24 @@ arc4_crypt:hex_src_string:hex_key_string:hex_dst_string
{
unsigned char src_str[1000];
unsigned char key_str[1000];
unsigned char dst_str[2000];
unsigned char dst_str[1000];
unsigned char dst_hexstr[2000];
int src_len, key_len;
arc4_context ctx;
memset(src_str, 0x00, 1000);
memset(key_str, 0x00, 1000);
memset(dst_str, 0x00, 2000);
memset(dst_str, 0x00, 1000);
memset(dst_hexstr, 0x00, 2000);
src_len = unhexify( src_str, {hex_src_string} );
key_len = unhexify( key_str, {hex_key_string} );
arc4_setup(&ctx, key_str, key_len);
TEST_ASSERT( arc4_crypt(&ctx, src_str, src_len) == 0 );
hexify( dst_str, src_str, src_len );
TEST_ASSERT( arc4_crypt(&ctx, src_len, src_str, dst_str ) == 0 );
hexify( dst_hexstr, dst_str, src_len );
TEST_ASSERT( strcmp( (char *) dst_str, {hex_dst_string} ) == 0 );
TEST_ASSERT( strcmp( (char *) dst_hexstr, {hex_dst_string} ) == 0 );
}
END_CASE