359 lines
10 KiB
C
359 lines
10 KiB
C
/*
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* Debugging routines
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*
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* Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_DEBUG_C)
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#include "mbedtls/debug.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32)
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#if !defined snprintf
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#define snprintf _snprintf
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#endif
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#if !defined vsnprintf
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#define vsnprintf _vsnprintf
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#endif
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#endif /* _MSC_VER */
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#define mbedtls_snprintf snprintf
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#endif
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static int debug_log_mode = MBEDTLS_DEBUG_DFL_MODE;
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static int debug_threshold = 0;
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void mbedtls_debug_set_log_mode( int log_mode )
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{
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debug_log_mode = log_mode;
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}
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void mbedtls_debug_set_threshold( int threshold )
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{
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debug_threshold = threshold;
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}
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char *mbedtls_debug_fmt( const char *format, ... )
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{
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va_list argp;
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static char str[512];
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int maxlen = sizeof( str ) - 1;
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va_start( argp, format );
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vsnprintf( str, maxlen, format, argp );
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va_end( argp );
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str[maxlen] = '\0';
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return( str );
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}
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void mbedtls_debug_print_msg( const mbedtls_ssl_context *ssl, int level,
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const char *file, int line, const char *text )
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{
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char str[512];
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int maxlen = sizeof( str ) - 1;
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if( ssl->f_dbg == NULL || level > debug_threshold )
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return;
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_RAW )
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{
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ssl->f_dbg( ssl->p_dbg, level, text );
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return;
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}
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mbedtls_snprintf( str, maxlen, "%s(%04d): %s\n", file, line, text );
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str[maxlen] = '\0';
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ssl->f_dbg( ssl->p_dbg, level, str );
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}
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void mbedtls_debug_print_ret( const mbedtls_ssl_context *ssl, int level,
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const char *file, int line,
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const char *text, int ret )
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{
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char str[512];
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int maxlen = sizeof( str ) - 1;
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size_t idx = 0;
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if( ssl->f_dbg == NULL || level > debug_threshold )
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return;
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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idx = mbedtls_snprintf( str, maxlen, "%s(%04d): ", file, line );
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mbedtls_snprintf( str + idx, maxlen - idx, "%s() returned %d (-0x%04x)\n",
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text, ret, -ret );
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str[maxlen] = '\0';
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ssl->f_dbg( ssl->p_dbg, level, str );
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}
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void mbedtls_debug_print_buf( const mbedtls_ssl_context *ssl, int level,
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const char *file, int line, const char *text,
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const unsigned char *buf, size_t len )
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{
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char str[512];
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char txt[17];
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size_t i, maxlen = sizeof( str ) - 1, idx = 0;
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if( ssl->f_dbg == NULL || level > debug_threshold )
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return;
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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idx = mbedtls_snprintf( str, maxlen, "%s(%04d): ", file, line );
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mbedtls_snprintf( str + idx, maxlen - idx, "dumping '%s' (%u bytes)\n",
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text, (unsigned int) len );
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str[maxlen] = '\0';
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ssl->f_dbg( ssl->p_dbg, level, str );
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idx = 0;
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memset( txt, 0, sizeof( txt ) );
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for( i = 0; i < len; i++ )
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{
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if( i >= 4096 )
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break;
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if( i % 16 == 0 )
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{
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if( i > 0 )
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{
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mbedtls_snprintf( str + idx, maxlen - idx, " %s\n", txt );
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ssl->f_dbg( ssl->p_dbg, level, str );
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idx = 0;
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memset( txt, 0, sizeof( txt ) );
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}
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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idx = mbedtls_snprintf( str, maxlen, "%s(%04d): ", file, line );
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idx += mbedtls_snprintf( str + idx, maxlen - idx, "%04x: ",
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(unsigned int) i );
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}
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idx += mbedtls_snprintf( str + idx, maxlen - idx, " %02x",
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(unsigned int) buf[i] );
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txt[i % 16] = ( buf[i] > 31 && buf[i] < 127 ) ? buf[i] : '.' ;
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}
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if( len > 0 )
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{
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for( /* i = i */; i % 16 != 0; i++ )
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idx += mbedtls_snprintf( str + idx, maxlen - idx, " " );
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mbedtls_snprintf( str + idx, maxlen - idx, " %s\n", txt );
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ssl->f_dbg( ssl->p_dbg, level, str );
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}
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}
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#if defined(MBEDTLS_ECP_C)
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void mbedtls_debug_print_ecp( const mbedtls_ssl_context *ssl, int level,
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const char *file, int line,
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const char *text, const mbedtls_ecp_point *X )
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{
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char str[512];
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int maxlen = sizeof( str ) - 1;
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if( ssl->f_dbg == NULL || level > debug_threshold )
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return;
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mbedtls_snprintf( str, maxlen, "%s(X)", text );
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str[maxlen] = '\0';
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mbedtls_debug_print_mpi( ssl, level, file, line, str, &X->X );
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mbedtls_snprintf( str, maxlen, "%s(Y)", text );
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str[maxlen] = '\0';
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mbedtls_debug_print_mpi( ssl, level, file, line, str, &X->Y );
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}
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#endif /* MBEDTLS_ECP_C */
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#if defined(MBEDTLS_BIGNUM_C)
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void mbedtls_debug_print_mpi( const mbedtls_ssl_context *ssl, int level,
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const char *file, int line,
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const char *text, const mbedtls_mpi *X )
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{
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char str[512];
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int j, k, maxlen = sizeof( str ) - 1, zeros = 1;
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size_t i, n, idx = 0;
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if( ssl->f_dbg == NULL || X == NULL || level > debug_threshold )
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return;
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for( n = X->n - 1; n > 0; n-- )
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if( X->p[n] != 0 )
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break;
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for( j = ( sizeof(mbedtls_mpi_uint) << 3 ) - 1; j >= 0; j-- )
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if( ( ( X->p[n] >> j ) & 1 ) != 0 )
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break;
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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idx = mbedtls_snprintf( str, maxlen, "%s(%04d): ", file, line );
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mbedtls_snprintf( str + idx, maxlen - idx, "value of '%s' (%d bits) is:\n",
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text, (int) ( ( n * ( sizeof(mbedtls_mpi_uint) << 3 ) ) + j + 1 ) );
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str[maxlen] = '\0';
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ssl->f_dbg( ssl->p_dbg, level, str );
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idx = 0;
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for( i = n + 1, j = 0; i > 0; i-- )
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{
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if( zeros && X->p[i - 1] == 0 )
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continue;
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for( k = sizeof( mbedtls_mpi_uint ) - 1; k >= 0; k-- )
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{
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if( zeros && ( ( X->p[i - 1] >> ( k << 3 ) ) & 0xFF ) == 0 )
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continue;
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else
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zeros = 0;
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if( j % 16 == 0 )
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{
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if( j > 0 )
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{
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mbedtls_snprintf( str + idx, maxlen - idx, "\n" );
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ssl->f_dbg( ssl->p_dbg, level, str );
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idx = 0;
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}
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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idx = mbedtls_snprintf( str, maxlen, "%s(%04d): ", file, line );
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}
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idx += mbedtls_snprintf( str + idx, maxlen - idx, " %02x", (unsigned int)
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( X->p[i - 1] >> ( k << 3 ) ) & 0xFF );
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j++;
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}
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}
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if( zeros == 1 )
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{
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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{
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idx = mbedtls_snprintf( str, maxlen, "%s(%04d): ", file, line );
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}
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idx += mbedtls_snprintf( str + idx, maxlen - idx, " 00" );
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}
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mbedtls_snprintf( str + idx, maxlen - idx, "\n" );
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ssl->f_dbg( ssl->p_dbg, level, str );
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}
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#endif /* MBEDTLS_BIGNUM_C */
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#if defined(MBEDTLS_X509_CRT_PARSE_C)
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static void debug_print_pk( const mbedtls_ssl_context *ssl, int level,
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const char *file, int line,
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const char *text, const mbedtls_pk_context *pk )
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{
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size_t i;
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mbedtls_pk_debug_item items[MBEDTLS_PK_DEBUG_MAX_ITEMS];
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char name[16];
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memset( items, 0, sizeof( items ) );
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if( mbedtls_pk_debug( pk, items ) != 0 )
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{
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mbedtls_debug_print_msg( ssl, level, file, line, "invalid PK context" );
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return;
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}
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for( i = 0; i < MBEDTLS_PK_DEBUG_MAX_ITEMS; i++ )
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{
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if( items[i].type == MBEDTLS_PK_DEBUG_NONE )
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return;
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mbedtls_snprintf( name, sizeof( name ), "%s%s", text, items[i].name );
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name[sizeof( name ) - 1] = '\0';
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if( items[i].type == MBEDTLS_PK_DEBUG_MPI )
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mbedtls_debug_print_mpi( ssl, level, file, line, name, items[i].value );
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else
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#if defined(MBEDTLS_ECP_C)
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if( items[i].type == MBEDTLS_PK_DEBUG_ECP )
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mbedtls_debug_print_ecp( ssl, level, file, line, name, items[i].value );
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else
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#endif
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mbedtls_debug_print_msg( ssl, level, file, line, "should not happen" );
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}
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}
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void mbedtls_debug_print_crt( const mbedtls_ssl_context *ssl, int level,
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const char *file, int line,
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const char *text, const mbedtls_x509_crt *crt )
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{
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char str[1024], prefix[64];
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int i = 0, maxlen = sizeof( prefix ) - 1, idx = 0;
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if( ssl->f_dbg == NULL || crt == NULL || level > debug_threshold )
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return;
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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{
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mbedtls_snprintf( prefix, maxlen, "%s(%04d): ", file, line );
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prefix[maxlen] = '\0';
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}
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else
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prefix[0] = '\0';
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maxlen = sizeof( str ) - 1;
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while( crt != NULL )
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{
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char buf[1024];
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mbedtls_x509_crt_info( buf, sizeof( buf ) - 1, prefix, crt );
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if( debug_log_mode == MBEDTLS_DEBUG_LOG_FULL )
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idx = mbedtls_snprintf( str, maxlen, "%s(%04d): ", file, line );
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mbedtls_snprintf( str + idx, maxlen - idx, "%s #%d:\n%s",
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text, ++i, buf );
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str[maxlen] = '\0';
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ssl->f_dbg( ssl->p_dbg, level, str );
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debug_print_pk( ssl, level, file, line, "crt->", &crt->pk );
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crt = crt->next;
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}
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}
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#endif /* MBEDTLS_X509_CRT_PARSE_C */
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#endif /* MBEDTLS_DEBUG_C */
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