mbed TLS upgraded to 2.6.0
Fork of mbedtls by
library/debug.c
- Committer:
- Jasper Wallace
- Date:
- 2017-09-29
- Revision:
- 2:bbdeda018a3c
- Parent:
- 1:9ebc941037d5
File content as of revision 2:bbdeda018a3c:
/* * Debugging routines * * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * This file is part of mbed TLS (https://tls.mbed.org) */ #if !defined(MBEDTLS_CONFIG_FILE) #include "mbedtls/config.h" #else #include MBEDTLS_CONFIG_FILE #endif #if defined(MBEDTLS_DEBUG_C) #if defined(MBEDTLS_PLATFORM_C) #include "mbedtls/platform.h" #else #include <stdlib.h> #define mbedtls_calloc calloc #define mbedtls_free free #define mbedtls_time_t time_t #define mbedtls_snprintf snprintf #endif #include "mbedtls/debug.h" #include <stdarg.h> #include <stdio.h> #include <string.h> #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \ !defined(inline) && !defined(__cplusplus) #define inline __inline #endif #define DEBUG_BUF_SIZE 512 static int debug_threshold = 0; void mbedtls_debug_set_threshold( int threshold ) { debug_threshold = threshold; } /* * All calls to f_dbg must be made via this function */ static inline void debug_send_line( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *str ) { /* * If in a threaded environment, we need a thread identifier. * Since there is no portable way to get one, use the address of the ssl * context instead, as it shouldn't be shared between threads. */ #if defined(MBEDTLS_THREADING_C) char idstr[20 + DEBUG_BUF_SIZE]; /* 0x + 16 nibbles + ': ' */ mbedtls_snprintf( idstr, sizeof( idstr ), "%p: %s", (void*)ssl, str ); ssl->conf->f_dbg( ssl->conf->p_dbg, level, file, line, idstr ); #else ssl->conf->f_dbg( ssl->conf->p_dbg, level, file, line, str ); #endif } void mbedtls_debug_print_msg( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *format, ... ) { va_list argp; char str[DEBUG_BUF_SIZE]; int ret; if( NULL == ssl || NULL == ssl->conf || NULL == ssl->conf->f_dbg || level > debug_threshold ) return; va_start( argp, format ); #if defined(_WIN32) #if defined(_TRUNCATE) ret = _vsnprintf_s( str, DEBUG_BUF_SIZE, _TRUNCATE, format, argp ); #else ret = _vsnprintf( str, DEBUG_BUF_SIZE, format, argp ); if( ret < 0 || (size_t) ret == DEBUG_BUF_SIZE ) { str[DEBUG_BUF_SIZE-1] = '\0'; ret = -1; } #endif #else ret = vsnprintf( str, DEBUG_BUF_SIZE, format, argp ); #endif va_end( argp ); if( ret >= 0 && ret < DEBUG_BUF_SIZE - 1 ) { str[ret] = '\n'; str[ret + 1] = '\0'; } debug_send_line( ssl, level, file, line, str ); } void mbedtls_debug_print_ret( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *text, int ret ) { char str[DEBUG_BUF_SIZE]; if( ssl->conf == NULL || ssl->conf->f_dbg == NULL || level > debug_threshold ) return; /* * With non-blocking I/O and examples that just retry immediately, * the logs would be quickly flooded with WANT_READ, so ignore that. * Don't ignore WANT_WRITE however, since is is usually rare. */ if( ret == MBEDTLS_ERR_SSL_WANT_READ ) return; mbedtls_snprintf( str, sizeof( str ), "%s() returned %d (-0x%04x)\n", text, ret, -ret ); debug_send_line( ssl, level, file, line, str ); } void mbedtls_debug_print_buf( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *text, const unsigned char *buf, size_t len ) { char str[DEBUG_BUF_SIZE]; char txt[17]; size_t i, idx = 0; if( ssl->conf == NULL || ssl->conf->f_dbg == NULL || level > debug_threshold ) return; mbedtls_snprintf( str + idx, sizeof( str ) - idx, "dumping '%s' (%u bytes)\n", text, (unsigned int) len ); debug_send_line( ssl, level, file, line, 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 ) { mbedtls_snprintf( str + idx, sizeof( str ) - idx, " %s\n", txt ); debug_send_line( ssl, level, file, line, str ); idx = 0; memset( txt, 0, sizeof( txt ) ); } idx += mbedtls_snprintf( str + idx, sizeof( str ) - idx, "%04x: ", (unsigned int) i ); } idx += mbedtls_snprintf( str + idx, sizeof( str ) - 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 += mbedtls_snprintf( str + idx, sizeof( str ) - idx, " " ); mbedtls_snprintf( str + idx, sizeof( str ) - idx, " %s\n", txt ); debug_send_line( ssl, level, file, line, str ); } } #if defined(MBEDTLS_ECP_C) void mbedtls_debug_print_ecp( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *text, const mbedtls_ecp_point *X ) { char str[DEBUG_BUF_SIZE]; if( ssl->conf == NULL || ssl->conf->f_dbg == NULL || level > debug_threshold ) return; mbedtls_snprintf( str, sizeof( str ), "%s(X)", text ); mbedtls_debug_print_mpi( ssl, level, file, line, str, &X->X ); mbedtls_snprintf( str, sizeof( str ), "%s(Y)", text ); mbedtls_debug_print_mpi( ssl, level, file, line, str, &X->Y ); } #endif /* MBEDTLS_ECP_C */ #if defined(MBEDTLS_BIGNUM_C) void mbedtls_debug_print_mpi( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *text, const mbedtls_mpi *X ) { char str[DEBUG_BUF_SIZE]; int j, k, zeros = 1; size_t i, n, idx = 0; if( ssl->conf == NULL || ssl->conf->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(mbedtls_mpi_uint) << 3 ) - 1; j >= 0; j-- ) if( ( ( X->p[n] >> j ) & 1 ) != 0 ) break; mbedtls_snprintf( str + idx, sizeof( str ) - idx, "value of '%s' (%d bits) is:\n", text, (int) ( ( n * ( sizeof(mbedtls_mpi_uint) << 3 ) ) + j + 1 ) ); debug_send_line( ssl, level, file, line, str ); idx = 0; for( i = n + 1, j = 0; i > 0; i-- ) { if( zeros && X->p[i - 1] == 0 ) continue; for( k = sizeof( mbedtls_mpi_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 ) { mbedtls_snprintf( str + idx, sizeof( str ) - idx, "\n" ); debug_send_line( ssl, level, file, line, str ); idx = 0; } } idx += mbedtls_snprintf( str + idx, sizeof( str ) - idx, " %02x", (unsigned int) ( X->p[i - 1] >> ( k << 3 ) ) & 0xFF ); j++; } } if( zeros == 1 ) idx += mbedtls_snprintf( str + idx, sizeof( str ) - idx, " 00" ); mbedtls_snprintf( str + idx, sizeof( str ) - idx, "\n" ); debug_send_line( ssl, level, file, line, str ); } #endif /* MBEDTLS_BIGNUM_C */ #if defined(MBEDTLS_X509_CRT_PARSE_C) static void debug_print_pk( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *text, const mbedtls_pk_context *pk ) { size_t i; mbedtls_pk_debug_item items[MBEDTLS_PK_DEBUG_MAX_ITEMS]; char name[16]; memset( items, 0, sizeof( items ) ); if( mbedtls_pk_debug( pk, items ) != 0 ) { debug_send_line( ssl, level, file, line, "invalid PK context\n" ); return; } for( i = 0; i < MBEDTLS_PK_DEBUG_MAX_ITEMS; i++ ) { if( items[i].type == MBEDTLS_PK_DEBUG_NONE ) return; mbedtls_snprintf( name, sizeof( name ), "%s%s", text, items[i].name ); name[sizeof( name ) - 1] = '\0'; if( items[i].type == MBEDTLS_PK_DEBUG_MPI ) mbedtls_debug_print_mpi( ssl, level, file, line, name, items[i].value ); else #if defined(MBEDTLS_ECP_C) if( items[i].type == MBEDTLS_PK_DEBUG_ECP ) mbedtls_debug_print_ecp( ssl, level, file, line, name, items[i].value ); else #endif debug_send_line( ssl, level, file, line, "should not happen\n" ); } } static void debug_print_line_by_line( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *text ) { char str[DEBUG_BUF_SIZE]; const char *start, *cur; start = text; for( cur = text; *cur != '\0'; cur++ ) { if( *cur == '\n' ) { size_t len = cur - start + 1; if( len > DEBUG_BUF_SIZE - 1 ) len = DEBUG_BUF_SIZE - 1; memcpy( str, start, len ); str[len] = '\0'; debug_send_line( ssl, level, file, line, str ); start = cur + 1; } } } void mbedtls_debug_print_crt( const mbedtls_ssl_context *ssl, int level, const char *file, int line, const char *text, const mbedtls_x509_crt *crt ) { char str[DEBUG_BUF_SIZE]; int i = 0; if( ssl->conf == NULL || ssl->conf->f_dbg == NULL || crt == NULL || level > debug_threshold ) return; while( crt != NULL ) { char buf[1024]; mbedtls_snprintf( str, sizeof( str ), "%s #%d:\n", text, ++i ); debug_send_line( ssl, level, file, line, str ); mbedtls_x509_crt_info( buf, sizeof( buf ) - 1, "", crt ); debug_print_line_by_line( ssl, level, file, line, buf ); debug_print_pk( ssl, level, file, line, "crt->", &crt->pk ); crt = crt->next; } } #endif /* MBEDTLS_X509_CRT_PARSE_C */ #endif /* MBEDTLS_DEBUG_C */