3b3aa36962
MPI sizes do fit in int. Let MSVC know this conversion is deliberate. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
423 lines
12 KiB
C
423 lines
12 KiB
C
/*
|
|
* Debugging routines
|
|
*
|
|
* Copyright The Mbed TLS Contributors
|
|
* 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.
|
|
*/
|
|
|
|
#include "common.h"
|
|
|
|
#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
|
|
#define mbedtls_vsnprintf vsnprintf
|
|
#endif
|
|
|
|
#include "mbedtls/debug.h"
|
|
#include "mbedtls/error.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
|
|
}
|
|
|
|
MBEDTLS_PRINTF_ATTRIBUTE(5, 6)
|
|
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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
|
|
if( NULL == ssl ||
|
|
NULL == ssl->conf ||
|
|
NULL == ssl->conf->f_dbg ||
|
|
level > debug_threshold )
|
|
{
|
|
return;
|
|
}
|
|
|
|
va_start( argp, format );
|
|
ret = mbedtls_vsnprintf( str, DEBUG_BUF_SIZE, format, argp );
|
|
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( NULL == ssl ||
|
|
NULL == ssl->conf ||
|
|
NULL == ssl->conf->f_dbg ||
|
|
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, (unsigned int) -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( NULL == ssl ||
|
|
NULL == ssl->conf ||
|
|
NULL == ssl->conf->f_dbg ||
|
|
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( NULL == ssl ||
|
|
NULL == ssl->conf ||
|
|
NULL == ssl->conf->f_dbg ||
|
|
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];
|
|
size_t bitlen;
|
|
size_t idx = 0;
|
|
|
|
if( NULL == ssl ||
|
|
NULL == ssl->conf ||
|
|
NULL == ssl->conf->f_dbg ||
|
|
NULL == X ||
|
|
level > debug_threshold )
|
|
{
|
|
return;
|
|
}
|
|
|
|
bitlen = mbedtls_mpi_bitlen( X );
|
|
|
|
mbedtls_snprintf( str, sizeof( str ), "value of '%s' (%u bits) is:\n",
|
|
text, (unsigned) bitlen );
|
|
debug_send_line( ssl, level, file, line, str );
|
|
|
|
if( bitlen == 0 )
|
|
{
|
|
str[0] = ' '; str[1] = '0'; str[2] = '0';
|
|
idx = 3;
|
|
}
|
|
else
|
|
{
|
|
int n;
|
|
for( n = (int) ( bitlen - 1 ) / 8; n >= 0; n-- )
|
|
{
|
|
size_t limb_offset = n / sizeof( mbedtls_mpi_uint );
|
|
size_t offset_in_limb = n % sizeof( mbedtls_mpi_uint );
|
|
unsigned char octet =
|
|
( X->p[limb_offset] >> ( offset_in_limb * 8 ) ) & 0xff;
|
|
mbedtls_snprintf( str + idx, sizeof( str ) - idx, " %02x", octet );
|
|
idx += 3;
|
|
/* Wrap lines after 16 octets that each take 3 columns */
|
|
if( idx >= 3 * 16 )
|
|
{
|
|
mbedtls_snprintf( str + idx, sizeof( str ) - idx, "\n" );
|
|
debug_send_line( ssl, level, file, line, str );
|
|
idx = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if( idx != 0 )
|
|
{
|
|
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) && !defined(MBEDTLS_X509_REMOVE_INFO)
|
|
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( NULL == ssl ||
|
|
NULL == ssl->conf ||
|
|
NULL == ssl->conf->f_dbg ||
|
|
NULL == crt ||
|
|
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 && MBEDTLS_X509_REMOVE_INFO */
|
|
|
|
#if defined(MBEDTLS_ECDH_C)
|
|
static void mbedtls_debug_printf_ecdh_internal( const mbedtls_ssl_context *ssl,
|
|
int level, const char *file,
|
|
int line,
|
|
const mbedtls_ecdh_context *ecdh,
|
|
mbedtls_debug_ecdh_attr attr )
|
|
{
|
|
#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
|
|
const mbedtls_ecdh_context* ctx = ecdh;
|
|
#else
|
|
const mbedtls_ecdh_context_mbed* ctx = &ecdh->ctx.mbed_ecdh;
|
|
#endif
|
|
|
|
switch( attr )
|
|
{
|
|
case MBEDTLS_DEBUG_ECDH_Q:
|
|
mbedtls_debug_print_ecp( ssl, level, file, line, "ECDH: Q",
|
|
&ctx->Q );
|
|
break;
|
|
case MBEDTLS_DEBUG_ECDH_QP:
|
|
mbedtls_debug_print_ecp( ssl, level, file, line, "ECDH: Qp",
|
|
&ctx->Qp );
|
|
break;
|
|
case MBEDTLS_DEBUG_ECDH_Z:
|
|
mbedtls_debug_print_mpi( ssl, level, file, line, "ECDH: z",
|
|
&ctx->z );
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void mbedtls_debug_printf_ecdh( const mbedtls_ssl_context *ssl, int level,
|
|
const char *file, int line,
|
|
const mbedtls_ecdh_context *ecdh,
|
|
mbedtls_debug_ecdh_attr attr )
|
|
{
|
|
#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
|
|
mbedtls_debug_printf_ecdh_internal( ssl, level, file, line, ecdh, attr );
|
|
#else
|
|
switch( ecdh->var )
|
|
{
|
|
default:
|
|
mbedtls_debug_printf_ecdh_internal( ssl, level, file, line, ecdh,
|
|
attr );
|
|
}
|
|
#endif
|
|
}
|
|
#endif /* MBEDTLS_ECDH_C */
|
|
|
|
#endif /* MBEDTLS_DEBUG_C */
|