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Merge pull request #3176 from aggarg/development

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Add support for const error description strings
This commit is contained in:
Gilles Peskine 2020-04-21 13:57:11 +02:00 committed by GitHub
commit dc9c47da6c
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 1054 additions and 678 deletions
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30
include/mbedtls/error.h
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@ -127,6 +127,36 @@ extern "C" {
*/
void mbedtls_strerror( int errnum, char *buffer, size_t buflen );
/**
* \brief Translate the high-level part of an Mbed TLS error code into a string
* representation.
*
* This function returns a const pointer to an un-modifiable string. The caller
* must not try to modify the string. It is intended to be used mostly for
* logging purposes.
*
* \param error_code error code
*
* \return The string representation of the error code, or \c NULL if the error
* code is unknown.
*/
const char * mbedtls_high_level_strerr( int error_code );
/**
* \brief Translate the low-level part of an Mbed TLS error code into a string
* representation.
*
* This function returns a const pointer to an un-modifiable string. The caller
* must not try to modify the string. It is intended to be used mostly for
* logging purposes.
*
* \param error_code error code
*
* \return The string representation of the error code, or \c NULL if the error
* code is unknown.
*/
const char * mbedtls_low_level_strerr( int error_code );
#ifdef __cplusplus
}
#endif

1601
library/error.c
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File diff suppressed because it is too large Load Diff

83
scripts/data_files/error.fmt
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@ -42,10 +42,60 @@
HEADER_INCLUDED
const char * mbedtls_high_level_strerr( int error_code )
{
int high_level_error_code;
const char *error_description = NULL;
if( error_code < 0 )
error_code = -error_code;
/* Extract the high-level part from the error code. */
high_level_error_code = error_code & 0xFF80;
switch( high_level_error_code )
{
/* Begin Auto-Generated Code. */
HIGH_LEVEL_CODE_CHECKS
/* End Auto-Generated Code. */
default:
break;
}
return error_description;
}
const char * mbedtls_low_level_strerr( int error_code )
{
int low_level_error_code;
const char *error_description = NULL;
if( error_code < 0 )
error_code = -error_code;
/* Extract the low-level part from the error code. */
low_level_error_code = error_code & ~0xFF80;
switch( low_level_error_code )
{
/* Begin Auto-Generated Code. */
LOW_LEVEL_CODE_CHECKS
/* End Auto-Generated Code. */
default:
break;
}
return error_description;
}
void mbedtls_strerror( int ret, char *buf, size_t buflen )
{
size_t len;
int use_ret;
const char * high_level_error_description = NULL;
const char * low_level_error_description = NULL;
if( buflen == 0 )
return;
@ -59,14 +109,20 @@ void mbedtls_strerror( int ret, char *buf, size_t buflen )
{
use_ret = ret & 0xFF80;
// High level error codes
//
// BEGIN generated code
HIGH_LEVEL_CODE_CHECKS
// END generated code
// Translate high level error code.
high_level_error_description = mbedtls_high_level_strerr( ret );
if( strlen( buf ) == 0 )
if( high_level_error_description == NULL )
mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
else
mbedtls_snprintf( buf, buflen, "%s", high_level_error_description );
#if defined(MBEDTLS_SSL_TLS_C)
// Early return in case of a fatal error - do not try to translate low
// level code.
if(use_ret == -(MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE))
return;
#endif /* MBEDTLS_SSL_TLS_C */
}
use_ret = ret & ~0xFF80;
@ -90,16 +146,13 @@ HIGH_LEVEL_CODE_CHECKS
buflen -= len + 3;
}
// Low level error codes
//
// BEGIN generated code
LOW_LEVEL_CODE_CHECKS
// END generated code
// Translate low level error code.
low_level_error_description = mbedtls_low_level_strerr( ret );
if( strlen( buf ) != 0 )
return;
mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
if( low_level_error_description == NULL )
mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
else
mbedtls_snprintf( buf, buflen, "%s", low_level_error_description );
}
#else /* MBEDTLS_ERROR_C */

18
scripts/generate_errors.pl
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@ -119,7 +119,7 @@ foreach my $line (@matches)
{
$code_check = \$ll_code_check;
$old_define = \$ll_old_define;
$white_space = ' ';
$white_space = ' ';
}
else
{
@ -160,19 +160,9 @@ foreach my $line (@matches)
${$old_define} = $define_name;
}
if ($error_name eq "MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE")
{
${$code_check} .= "${white_space}if( use_ret == -($error_name) )\n".
"${white_space}\{\n".
"${white_space} mbedtls_snprintf( buf, buflen, \"$module_name - $description\" );\n".
"${white_space} return;\n".
"${white_space}}\n"
}
else
{
${$code_check} .= "${white_space}if( use_ret == -($error_name) )\n".
"${white_space} mbedtls_snprintf( buf, buflen, \"$module_name - $description\" );\n"
}
${$code_check} .= "${white_space}case -($error_name):\n".
"${white_space} error_description = \"$module_name - $description\";\n".
"${white_space} break;\n"
};
if ($ll_old_define ne "")