mirror of
https://github.com/1f349/twofactor.git
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52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
package twofactor
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import (
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"math"
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)
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// Helper function which rounds the float to the nearest integet
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func round(n float64) uint64 {
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if n < 0 {
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return uint64(math.Ceil(n - 0.5))
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}
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return uint64(math.Floor(n + 0.5))
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}
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// helper function which converts a uint64 to a []byte in Big Endian
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func bigEndianUint64(n uint64) [8]byte {
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data := [8]byte{}
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data[0] = byte((n >> 56) & 0xFF)
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data[1] = byte((n >> 48) & 0xFF)
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data[2] = byte((n >> 40) & 0xFF)
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data[3] = byte((n >> 32) & 0xFF)
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data[4] = byte((n >> 24) & 0xFF)
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data[5] = byte((n >> 16) & 0xFF)
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data[6] = byte((n >> 8) & 0xFF)
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data[7] = byte(n & 0xFF)
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return data
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}
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// helper function which converts a big endian []byte to a uint64
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func uint64FromBigEndian(data [8]byte) uint64 {
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i := (uint64(data[7]) << 0) | (uint64(data[6]) << 8) |
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(uint64(data[5]) << 16) | (uint64(data[4]) << 24) |
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(uint64(data[3]) << 32) | (uint64(data[2]) << 40) |
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(uint64(data[1]) << 48) | (uint64(data[0]) << 56)
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return uint64(i)
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}
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func bigEndianInt(n int) [4]byte {
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data := [4]byte{}
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data[0] = byte((n >> 24) & 0xFF)
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data[1] = byte((n >> 16) & 0xFF)
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data[2] = byte((n >> 8) & 0xFF)
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data[3] = byte(n & 0xFF)
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return data
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}
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func intFromBigEndian(data [4]byte) int {
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i := (int(data[3]) << 0) | (int(data[2]) << 8) |
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(int(data[1]) << 16) | (int(data[0]) << 24)
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return int(i)
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}
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