subtle

Imports

Imports #

"runtime"
"unsafe"
"crypto/internal/fips140/alias"

Constants & Variables

supportsUnaligned const #

const supportsUnaligned = *ast.BinaryExpr

wordSize const #

const wordSize = *ast.CallExpr

Functions

ConstantTimeByteEq function #

ConstantTimeByteEq returns 1 if x == y and 0 otherwise.

func ConstantTimeByteEq(x uint8, y uint8) int

ConstantTimeCompare function #

ConstantTimeCompare returns 1 if the two slices, x and y, have equal contents and 0 otherwise. The time taken is a function of the length of the slices and is independent of the contents. If the lengths of x and y do not match it returns 0 immediately.

func ConstantTimeCompare(x []byte, y []byte) int

ConstantTimeCopy function #

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 ConstantTimeCopy(v int, x []byte, y []byte)

ConstantTimeEq function #

ConstantTimeEq returns 1 if x == y and 0 otherwise.

func ConstantTimeEq(x int32, y int32) int

ConstantTimeLessOrEq function #

ConstantTimeLessOrEq returns 1 if x <= y and 0 otherwise. Its behavior is undefined if x or y are negative or > 2**31 - 1.

func ConstantTimeLessOrEq(x int, y int) int

ConstantTimeSelect function #

ConstantTimeSelect returns x if v == 1 and y if v == 0. Its behavior is undefined if v takes any other value.

func ConstantTimeSelect(v int, x int, y int) int

XORBytes function #

XORBytes sets dst[i] = x[i] ^ y[i] for all i < n = min(len(x), len(y)), returning n, the number of bytes written to dst. If dst does not have length at least n, XORBytes panics without writing anything to dst. dst and x or y may overlap exactly or not at all, otherwise XORBytes may panic.

func XORBytes(dst []byte, x []byte, y []byte) int

aligned function #

aligned reports whether dst, x, and y are all word-aligned pointers.

func aligned(dst *byte, x *byte, y *byte) bool

words function #

words returns a []uintptr pointing at the same data as x, with any trailing partial word removed.

func words(x []byte) []uintptr

xorBytes function #

go:noescape

func xorBytes(dst *byte, a *byte, b *byte, n int)

xorBytes function #

go:noescape

func xorBytes(dst *byte, a *byte, b *byte, n int)

xorBytes function #

func xorBytes(dstb *byte, xb *byte, yb *byte, n int)

xorBytes function #

go:noescape

func xorBytes(dst *byte, a *byte, b *byte, n int)

xorBytes function #

go:noescape

func xorBytes(dst *byte, a *byte, b *byte, n int)

xorLoop function #

func xorLoop(dst []T, x []T, y []T)

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