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Allow checking variable IV/key size in cipher_info

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Signed-off-by: Max Fillinger <max@max-fillinger.net>
This commit is contained in:
Max Fillinger 2021-11-09 21:48:08 +01:00
parent 3a782a0fe4
commit f057893035
1 changed files with 36 additions and 0 deletions
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36
include/mbedtls/cipher.h
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@ -542,6 +542,42 @@ static inline unsigned int mbedtls_cipher_info_get_block_size(
return( info->MBEDTLS_PRIVATE(block_size) );
}
/**
* \brief This function returns a non-zero value if the key length for
* the given cipher is variable.
*
* \param info The cipher info structure. This may be \c NULL.
*
* \return Non-zero if the key length is variable, \c 0 otherwise.
* \return \c 0 if the given pointer is \c NULL.
*/
static inline int mbedtls_cipher_info_has_variable_key_bitlen(
const mbedtls_cipher_info_t *info )
{
if( info == NULL )
return( 0 );
return( info->MBEDTLS_PRIVATE(flags) & MBEDTLS_CIPHER_VARIABLE_KEY_LEN );
}
/**
* \brief This function returns a non-zero value if the IV size for
* the given cipher is variable.
*
* \param info The cipher info structure. This may be \c NULL.
*
* \return Non-zero if the IV size is variable, \c 0 otherwise.
* \return \c 0 if the given pointer is \c NULL.
*/
static inline int mbedtls_cipher_info_has_variable_iv_size(
const mbedtls_cipher_info_t *info )
{
if( info == NULL )
return( 0 );
return( info->MBEDTLS_PRIVATE(flags) & MBEDTLS_CIPHER_VARIABLE_IV_LEN );
}
/**
* \brief This function initializes a \p cipher_context as NONE.
*