library/debug.c - third_party/github/ARMmbed/mbedtls - Git at Google

 /*
  *  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 */
	/*
	* 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 */