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Fix and document corner-cases of time checking

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Manuel Pégourié-Gonnard 2015-06-22 19:15:32 +02:00
parent 57e10d71be
commit e7e89844d6
2 changed files with 16 additions and 10 deletions
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22
include/mbedtls/x509.h
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@ -238,24 +238,30 @@ int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn );
int mbedtls_x509_serial_gets( char *buf, size_t size, const mbedtls_x509_buf *serial );
/**
* \brief Check a given mbedtls_x509_time against the system time and check
* if it is not expired.
* \brief Check a given mbedtls_x509_time against the system time
* and tell if it's in the past.
*
* \note Intended usage is "if( is_past( valid_to ) ) ERROR".
* Hence the return value of 1 if on internal errors.
*
* \param time mbedtls_x509_time to check
*
* \return 0 if the mbedtls_x509_time is still valid,
* 1 otherwise.
* \return 1 if the given time is in the past or an error occured,
* 0 otherwise.
*/
int mbedtls_x509_time_is_past( const mbedtls_x509_time *time );
/**
* \brief Check a given mbedtls_x509_time against the system time and check
* if it is not from the future.
* \brief Check a given mbedtls_x509_time against the system time
* and tell if it's in the future.
*
* \note Intended usage is "if( is_future( valid_from ) ) ERROR".
* Hence the return value of 1 if on internal errors.
*
* \param time mbedtls_x509_time to check
*
* \return 0 if the mbedtls_x509_time is already valid,
* 1 otherwise.
* \return 1 if the given time is in the future or an error occured,
* 0 otherwise.
*/
int mbedtls_x509_time_is_future( const mbedtls_x509_time *time );

4
library/x509.c
View File

@ -922,7 +922,7 @@ int mbedtls_x509_time_is_past( const mbedtls_x509_time *to )
mbedtls_x509_time now;
if( x509_get_current_time( &now ) != 0 )
return( -1 );
return( 1 );
return( x509_check_time( &now, to ) );
}
@ -932,7 +932,7 @@ int mbedtls_x509_time_is_future( const mbedtls_x509_time *from )
mbedtls_x509_time now;
if( x509_get_current_time( &now ) != 0 )
return( -1 );
return( 1 );
return( x509_check_time( from, &now ) );
}