diff options
Diffstat (limited to 'src/pkg/crypto/subtle/constant_time.go')
| -rw-r--r-- | src/pkg/crypto/subtle/constant_time.go | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/src/pkg/crypto/subtle/constant_time.go b/src/pkg/crypto/subtle/constant_time.go index 8b5e37ee0..edbfa84fb 100644 --- a/src/pkg/crypto/subtle/constant_time.go +++ b/src/pkg/crypto/subtle/constant_time.go @@ -13,7 +13,7 @@ func ConstantTimeCompare(x, y []byte) int { var v byte; for i := 0; i < len(x); i++ { - v |= x[i]^y[i] + v |= x[i] ^ y[i] } return ConstantTimeByteEq(v, 0); @@ -21,35 +21,35 @@ func ConstantTimeCompare(x, y []byte) int { // ConstantTimeSelect returns x if v is 1 and y if v is 0. // Its behavior is undefined if v takes any other value. -func ConstantTimeSelect(v, x, y int) int { return ^(v-1) & x | (v-1)&y } +func ConstantTimeSelect(v, x, y int) int { return ^(v-1)&x | (v-1)&y } // ConstantTimeByteEq returns 1 if x == x and 0 otherwise. func ConstantTimeByteEq(x, y uint8) int { - z := ^(x^y); - z &= z>>4; - z &= z>>2; - z &= z>>1; + z := ^(x ^ y); + z &= z >> 4; + z &= z >> 2; + z &= z >> 1; return int(z); } // ConstantTimeEq returns 1 if x == y and 0 otherwise. func ConstantTimeEq(x, y int32) int { - z := ^(x^y); - z &= z>>16; - z &= z>>8; - z &= z>>4; - z &= z>>2; - z &= z>>1; - - return int(z&1); + z := ^(x ^ y); + z &= z >> 16; + z &= z >> 8; + z &= z >> 4; + z &= z >> 2; + z &= z >> 1; + + return int(z & 1); } // ConstantTimeCopy copies the contents of y into x iff v == 1. If v == 0, x is left unchanged. // Its behavior is undefined if v takes any other value. func ConstantTimeCopy(v int, x, y []byte) { - xmask := byte(v-1); - ymask := byte(^(v-1)); + xmask := byte(v - 1); + ymask := byte(^(v - 1)); for i := 0; i < len(x); i++ { x[i] = x[i]&xmask | y[i]&ymask } |