| /* |
| * Debugging routines |
| * |
| * Copyright (C) 2006-2014, ARM Limited, All Rights Reserved |
| * |
| * This file is part of mbed TLS (https://tls.mbed.org) |
| * |
| * 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. |
| */ |
| |
| #if !defined(POLARSSL_CONFIG_FILE) |
| #include "polarssl/config.h" |
| #else |
| #include POLARSSL_CONFIG_FILE |
| #endif |
| |
| #if defined(POLARSSL_DEBUG_C) |
| |
| #include "polarssl/debug.h" |
| |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32) |
| #if !defined snprintf |
| #define snprintf _snprintf |
| #endif |
| |
| #if !defined vsnprintf |
| #define vsnprintf _vsnprintf |
| #endif |
| #endif /* _MSC_VER */ |
| |
| #if defined(POLARSSL_PLATFORM_C) |
| #include "polarssl/platform.h" |
| #else |
| #define polarssl_snprintf snprintf |
| #define polarssl_malloc malloc |
| #define polarssl_free free |
| #endif |
| |
| #define DEBUG_BUF_SIZE 512 |
| |
| static int debug_log_mode = POLARSSL_DEBUG_DFL_MODE; |
| static int debug_threshold = 0; |
| |
| void debug_set_log_mode( int log_mode ) |
| { |
| debug_log_mode = log_mode; |
| } |
| |
| void debug_set_threshold( int threshold ) |
| { |
| debug_threshold = threshold; |
| } |
| |
| char *debug_fmt( const char *format, ... ) |
| { |
| va_list argp; |
| #if defined(POLARSSL_THREADING_C) |
| char *str = polarssl_malloc( DEBUG_BUF_SIZE ); |
| |
| if( str == NULL ) |
| return( NULL ); |
| #else |
| static char str[DEBUG_BUF_SIZE]; |
| #endif |
| |
| va_start( argp, format ); |
| vsnprintf( str, DEBUG_BUF_SIZE - 1, format, argp ); |
| va_end( argp ); |
| |
| str[DEBUG_BUF_SIZE - 1] = '\0'; |
| return( str ); |
| } |
| |
| void debug_print_msg_free( const ssl_context *ssl, int level, |
| const char *file, int line, char *text ) |
| { |
| if( text != NULL ) |
| debug_print_msg( ssl, level, file, line, text ); |
| |
| #if defined(POLARSSL_THREADING_C) |
| polarssl_free( text ); |
| #endif |
| } |
| |
| 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 || level > debug_threshold ) |
| return; |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_RAW ) |
| { |
| ssl->f_dbg( ssl->p_dbg, level, text ); |
| return; |
| } |
| |
| polarssl_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; |
| size_t idx = 0; |
| |
| if( ssl->f_dbg == NULL || level > debug_threshold ) |
| return; |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| idx = polarssl_snprintf( str, maxlen, "%s(%04d): ", file, line ); |
| |
| polarssl_snprintf( str + idx, maxlen - idx, "%s() returned %d (-0x%04x)\n", |
| 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]; |
| char txt[17]; |
| size_t i, maxlen = sizeof( str ) - 1, idx = 0; |
| |
| if( ssl->f_dbg == NULL || level > debug_threshold ) |
| return; |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| idx = polarssl_snprintf( str, maxlen, "%s(%04d): ", file, line ); |
| |
| polarssl_snprintf( str + idx, maxlen - idx, "dumping '%s' (%u bytes)\n", |
| text, (unsigned int) len ); |
| |
| str[maxlen] = '\0'; |
| ssl->f_dbg( ssl->p_dbg, level, str ); |
| |
| idx = 0; |
| memset( txt, 0, sizeof( txt ) ); |
| for( i = 0; i < len; i++ ) |
| { |
| if( i >= 4096 ) |
| break; |
| |
| if( i % 16 == 0 ) |
| { |
| if( i > 0 ) |
| { |
| polarssl_snprintf( str + idx, maxlen - idx, " %s\n", txt ); |
| ssl->f_dbg( ssl->p_dbg, level, str ); |
| |
| idx = 0; |
| memset( txt, 0, sizeof( txt ) ); |
| } |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| idx = polarssl_snprintf( str, maxlen, "%s(%04d): ", file, line ); |
| |
| idx += polarssl_snprintf( str + idx, maxlen - idx, "%04x: ", |
| (unsigned int) i ); |
| |
| } |
| |
| idx += polarssl_snprintf( str + idx, maxlen - idx, " %02x", |
| (unsigned int) buf[i] ); |
| txt[i % 16] = ( buf[i] > 31 && buf[i] < 127 ) ? buf[i] : '.' ; |
| } |
| |
| if( len > 0 ) |
| { |
| for( /* i = i */; i % 16 != 0; i++ ) |
| idx += polarssl_snprintf( str + idx, maxlen - idx, " " ); |
| |
| polarssl_snprintf( str + idx, maxlen - idx, " %s\n", txt ); |
| ssl->f_dbg( ssl->p_dbg, level, str ); |
| } |
| } |
| |
| #if defined(POLARSSL_ECP_C) |
| void debug_print_ecp( const ssl_context *ssl, int level, |
| const char *file, int line, |
| const char *text, const ecp_point *X ) |
| { |
| char str[512]; |
| int maxlen = sizeof( str ) - 1; |
| |
| if( ssl->f_dbg == NULL || level > debug_threshold ) |
| return; |
| |
| polarssl_snprintf( str, maxlen, "%s(X)", text ); |
| str[maxlen] = '\0'; |
| debug_print_mpi( ssl, level, file, line, str, &X->X ); |
| |
| polarssl_snprintf( str, maxlen, "%s(Y)", text ); |
| str[maxlen] = '\0'; |
| debug_print_mpi( ssl, level, file, line, str, &X->Y ); |
| } |
| #endif /* POLARSSL_ECP_C */ |
| |
| #if defined(POLARSSL_BIGNUM_C) |
| 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, idx = 0; |
| |
| if( ssl->f_dbg == NULL || X == NULL || level > debug_threshold ) |
| return; |
| |
| for( n = X->n - 1; n > 0; n-- ) |
| if( X->p[n] != 0 ) |
| break; |
| |
| for( j = ( sizeof(t_uint) << 3 ) - 1; j >= 0; j-- ) |
| if( ( ( X->p[n] >> j ) & 1 ) != 0 ) |
| break; |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| idx = polarssl_snprintf( str, maxlen, "%s(%04d): ", file, line ); |
| |
| polarssl_snprintf( str + idx, maxlen - idx, "value of '%s' (%d bits) is:\n", |
| text, (int) ( ( n * ( sizeof(t_uint) << 3 ) ) + j + 1 ) ); |
| |
| str[maxlen] = '\0'; |
| ssl->f_dbg( ssl->p_dbg, level, str ); |
| |
| idx = 0; |
| for( i = n + 1, j = 0; i > 0; i-- ) |
| { |
| if( zeros && X->p[i - 1] == 0 ) |
| continue; |
| |
| for( k = sizeof( t_uint ) - 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 ) |
| { |
| polarssl_snprintf( str + idx, maxlen - idx, "\n" ); |
| ssl->f_dbg( ssl->p_dbg, level, str ); |
| idx = 0; |
| } |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| idx = polarssl_snprintf( str, maxlen, "%s(%04d): ", file, line ); |
| } |
| |
| idx += polarssl_snprintf( str + idx, maxlen - idx, " %02x", (unsigned int) |
| ( X->p[i - 1] >> ( k << 3 ) ) & 0xFF ); |
| |
| j++; |
| } |
| |
| } |
| |
| if( zeros == 1 ) |
| { |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| { |
| idx = polarssl_snprintf( str, maxlen, "%s(%04d): ", file, line ); |
| |
| } |
| idx += polarssl_snprintf( str + idx, maxlen - idx, " 00" ); |
| } |
| |
| polarssl_snprintf( str + idx, maxlen - idx, "\n" ); |
| ssl->f_dbg( ssl->p_dbg, level, str ); |
| } |
| #endif /* POLARSSL_BIGNUM_C */ |
| |
| #if defined(POLARSSL_X509_CRT_PARSE_C) |
| static void debug_print_pk( const ssl_context *ssl, int level, |
| const char *file, int line, |
| const char *text, const pk_context *pk ) |
| { |
| size_t i; |
| pk_debug_item items[POLARSSL_PK_DEBUG_MAX_ITEMS]; |
| char name[16]; |
| |
| memset( items, 0, sizeof( items ) ); |
| |
| if( pk_debug( pk, items ) != 0 ) |
| { |
| debug_print_msg( ssl, level, file, line, "invalid PK context" ); |
| return; |
| } |
| |
| for( i = 0; i < POLARSSL_PK_DEBUG_MAX_ITEMS; i++ ) |
| { |
| if( items[i].type == POLARSSL_PK_DEBUG_NONE ) |
| return; |
| |
| polarssl_snprintf( name, sizeof( name ), "%s%s", text, items[i].name ); |
| name[sizeof( name ) - 1] = '\0'; |
| |
| if( items[i].type == POLARSSL_PK_DEBUG_MPI ) |
| debug_print_mpi( ssl, level, file, line, name, items[i].value ); |
| else |
| #if defined(POLARSSL_ECP_C) |
| if( items[i].type == POLARSSL_PK_DEBUG_ECP ) |
| debug_print_ecp( ssl, level, file, line, name, items[i].value ); |
| else |
| #endif |
| debug_print_msg( ssl, level, file, line, "should not happen" ); |
| } |
| } |
| |
| void debug_print_crt( const ssl_context *ssl, int level, |
| const char *file, int line, |
| const char *text, const x509_crt *crt ) |
| { |
| char str[1024], prefix[64]; |
| int i = 0, maxlen = sizeof( prefix ) - 1, idx = 0; |
| |
| if( ssl->f_dbg == NULL || crt == NULL || level > debug_threshold ) |
| return; |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| { |
| polarssl_snprintf( prefix, maxlen, "%s(%04d): ", file, line ); |
| prefix[maxlen] = '\0'; |
| } |
| else |
| prefix[0] = '\0'; |
| |
| maxlen = sizeof( str ) - 1; |
| |
| while( crt != NULL ) |
| { |
| char buf[1024]; |
| x509_crt_info( buf, sizeof( buf ) - 1, prefix, crt ); |
| |
| if( debug_log_mode == POLARSSL_DEBUG_LOG_FULL ) |
| idx = polarssl_snprintf( str, maxlen, "%s(%04d): ", file, line ); |
| |
| polarssl_snprintf( str + idx, maxlen - idx, "%s #%d:\n%s", |
| text, ++i, buf ); |
| |
| str[maxlen] = '\0'; |
| ssl->f_dbg( ssl->p_dbg, level, str ); |
| |
| debug_print_pk( ssl, level, file, line, "crt->", &crt->pk ); |
| |
| crt = crt->next; |
| } |
| } |
| #endif /* POLARSSL_X509_CRT_PARSE_C */ |
| |
| #endif /* POLARSSL_DEBUG_C */ |