Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly.
Internal call graph ▹
Internal call graph ▾
In the call graph viewer below, each node is a function belonging to this package and its children are the functions it calls—perhaps dynamically.
The root nodes are the entry points of the package: functions that may be called from outside the package. There may be non-exported or anonymous functions among them if they are called dynamically from another package.
Click a node to visit that function's source code.
From there you can visit its callers by
clicking its declaring
Functions may be omitted if they were determined to be unreachable in the particular programs or tests that were analyzed.
func ConstantTimeByteEq ¶
func ConstantTimeByteEq(x, y uint8) int
ConstantTimeByteEq returns 1 if x == y and 0 otherwise.
func ConstantTimeCompare ¶
func ConstantTimeCompare(x, y byte) int
ConstantTimeCompare returns 1 if and only if the two slices, x and y, have equal contents. The time taken is a function of the length of the slices and is independent of the contents.
func ConstantTimeCopy ¶
func ConstantTimeCopy(v int, x, y byte)
ConstantTimeCopy copies the contents of y into x (a slice of equal length) if v == 1. If v == 0, x is left unchanged. Its behavior is undefined if v takes any other value.
func ConstantTimeEq ¶
func ConstantTimeEq(x, y int32) int
ConstantTimeEq returns 1 if x == y and 0 otherwise.
func ConstantTimeLessOrEq ¶
func ConstantTimeLessOrEq(x, y int) int
ConstantTimeLessOrEq returns 1 if x <= y and 0 otherwise. Its behavior is undefined if x or y are negative or > 2**31 - 1.
func ConstantTimeSelect ¶
func ConstantTimeSelect(v, x, y int) int
ConstantTimeSelect returns x if v is 1 and y if v is 0. Its behavior is undefined if v takes any other value.