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/*
* Debugging routines
*
* Copyright (C) 2006-2010, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "polarssl/config.h"
#if defined(POLARSSL_DEBUG_C)
#include "polarssl/debug.h"
#include <stdarg.h>
#include <stdlib.h>
#if defined _MSC_VER && !defined snprintf
#define snprintf _snprintf
#endif
#if defined _MSC_VER && !defined vsnprintf
#define vsnprintf _vsnprintf
#endif
char *debug_fmt( const char *format, ... )
{
va_list argp;
static char str[512];
int maxlen = sizeof( str ) - 1;
va_start( argp, format );
vsnprintf( str, maxlen, format, argp );
va_end( argp );
str[maxlen] = '\0';
return( str );
}
void debug_print_msg( const ssl_context *ssl, int level,
const char *file, int line, const char *text )
{
char str[512];
int maxlen = sizeof( str ) - 1;
if( ssl->f_dbg == NULL )
return;
snprintf( str, maxlen, "%s(%04d): %s\n", file, line, text );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
}
void debug_print_ret( const ssl_context *ssl, int level,
const char *file, int line,
const char *text, int ret )
{
char str[512];
int maxlen = sizeof( str ) - 1;
if( ssl->f_dbg == NULL )
return;
snprintf( str, maxlen, "%s(%04d): %s() returned %d (0x%x)\n",
file, line, text, ret, ret );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
}
void debug_print_buf( const ssl_context *ssl, int level,
const char *file, int line, const char *text,
unsigned char *buf, size_t len )
{
char str[512];
size_t i, maxlen = sizeof( str ) - 1;
if( ssl->f_dbg == NULL )
return;
snprintf( str, maxlen, "%s(%04d): dumping '%s' (%d bytes)\n",
file, line, text, len );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
for( i = 0; i < len; i++ )
{
if( i >= 4096 )
break;
if( i % 16 == 0 )
{
if( i > 0 )
ssl->f_dbg( ssl->p_dbg, level, "\n" );
snprintf( str, maxlen, "%s(%04d): %04x: ", file, line, i );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
}
snprintf( str, maxlen, " %02x", (unsigned int) buf[i] );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
}
if( len > 0 )
ssl->f_dbg( ssl->p_dbg, level, "\n" );
}
void debug_print_mpi( const ssl_context *ssl, int level,
const char *file, int line,
const char *text, const mpi *X )
{
char str[512];
int j, k, maxlen = sizeof( str ) - 1, zeros = 1;
size_t i, n;
if( ssl->f_dbg == NULL || X == NULL )
return;
for( n = X->n - 1; n > 0; n-- )
if( X->p[n] != 0 )
break;
for( j = ( sizeof(t_int) << 3 ) - 1; j >= 0; j-- )
if( ( ( X->p[n] >> j ) & 1 ) != 0 )
break;
snprintf( str, maxlen, "%s(%04d): value of '%s' (%lu bits) is:\n",
file, line, text,
(unsigned long) ( ( n * ( sizeof(t_int) << 3 ) ) + j + 1 ) );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
for( i = n + 1, j = 0; i > 0; i-- )
{
if( zeros && X->p[i - 1] == 0 )
continue;
for( k = sizeof( t_int ) - 1; k >= 0; k-- )
{
if( zeros && ( ( X->p[i - 1] >> (k << 3) ) & 0xFF ) == 0 )
continue;
else
zeros = 0;
if( j % 16 == 0 )
{
if( j > 0 )
ssl->f_dbg( ssl->p_dbg, level, "\n" );
snprintf( str, maxlen, "%s(%04d): ", file, line );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
}
snprintf( str, maxlen, " %02x", (unsigned int)
( X->p[i - 1] >> (k << 3) ) & 0xFF );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
j++;
}
}
if( zeros == 1 )
{
snprintf( str, maxlen, "%s(%04d): ", file, line );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
ssl->f_dbg( ssl->p_dbg, level, " 00" );
}
ssl->f_dbg( ssl->p_dbg, level, "\n" );
}
void debug_print_crt( const ssl_context *ssl, int level,
const char *file, int line,
const char *text, const x509_cert *crt )
{
char str[1024], prefix[64];
int i = 0, maxlen = sizeof( prefix ) - 1;
if( ssl->f_dbg == NULL || crt == NULL )
return;
snprintf( prefix, maxlen, "%s(%04d): ", file, line );
prefix[maxlen] = '\0';
maxlen = sizeof( str ) - 1;
while( crt != NULL )
{
char buf[1024];
x509parse_cert_info( buf, sizeof( buf ) - 1, prefix, crt );
snprintf( str, maxlen, "%s(%04d): %s #%d:\n%s",
file, line, text, ++i, buf );
str[maxlen] = '\0';
ssl->f_dbg( ssl->p_dbg, level, str );
debug_print_mpi( ssl, level, file, line,
"crt->rsa.N", &crt->rsa.N );
debug_print_mpi( ssl, level, file, line,
"crt->rsa.E", &crt->rsa.E );
crt = crt->next;
}
}
#endif