fn any_overlap #
fn any_overlap(x u8, y u8) bool
NOTE: require unsafe in future any_overlap reports whether x and y share memory at any (not necessarily corresponding) index. The memory beyond the slice length is ignored.
fn constant_time_byte_eq #
fn constant_time_byte_eq(x byte, y byte) int
constant_time_byte_eq returns 1 when x == y.
fn constant_time_compare #
fn constant_time_compare(x u8, y u8) int
constant_time_compare returns 1 when x and y have equal contents.
The runtime of this function is proportional of the length of x and y.
It is NOT dependent on their content.
fn constant_time_copy #
fn constant_time_copy(v int, mut x u8, y u8)
constant_time_copy copies the contents of y into x, when v == 1.
When v == 0, x is left unchanged. this function is undefined, when v takes any other value
fn constant_time_eq #
fn constant_time_eq(x int, y int) int
constant_time_eq returns 1 when x == y.
fn constant_time_less_or_eq #
fn constant_time_less_or_eq(x int, y int) int
constant_time_less_or_eq returns 1 if x <= y, and 0 otherwise.
it is undefined when x or y are negative, or > (2^32 - 1)
fn constant_time_select #
fn constant_time_select(v int, x int, y int) int
constant_time_select returns x when v == 1, and y when v == 0.
it is undefined when v is any other value
fn inexact_overlap #
fn inexact_overlap(x u8, y u8) bool
inexact_overlap reports whether x and y share memory at any non-corresponding index. The memory beyond the slice length is ignored. Note that x and y can have different lengths and still not have any inexact overlap.
inexact_overlap can be used to implement the requirements of the crypto/cipher AEAD, Block, BlockMode and Stream interfaces.