54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package contentenc
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import (
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"fmt"
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"testing"
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"github.com/rfjakob/gocryptfs/v2/internal/cryptocore"
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)
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// TestSizeToSize tests CipherSizeToPlainSize and PlainSizeToCipherSize
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func TestSizeToSize(t *testing.T) {
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key := make([]byte, cryptocore.KeyLen)
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cc := cryptocore.New(key, cryptocore.BackendGoGCM, DefaultIVBits, true, false)
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ce := New(cc, DefaultBS, false)
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const rangeMax = 10000
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// y values in this order:
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// 0 ... CipherSizeToPlainSize
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// 1 ... PlainSizeToCipherSize
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// 2 ... PlainOffToCipherOff
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var yTable [rangeMax][3]uint64
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// Calculate values
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for x := range yTable {
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yTable[x][0] = ce.CipherSizeToPlainSize(uint64(x))
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yTable[x][1] = ce.PlainSizeToCipherSize(uint64(x))
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yTable[x][2] = ce.PlainOffToCipherOff(uint64(x))
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}
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// Print data table
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fmt.Print("x\tCipherSizeToPlainSize\tPlainSizeToCipherSize\tPlainOffToCipherOff\n")
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for x := range yTable {
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if x > 1 && x < rangeMax-1 {
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// If the point before has value-1 and the point after has value+1,
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// it is not interesting. Don't print it out.
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interesting := false
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for i := 0; i <= 2; i++ {
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if yTable[x-1][i]+1 != yTable[x][i] && yTable[x][i]+1 != yTable[x+1][i]+1 {
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interesting = true
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}
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// Monotonicity check
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if yTable[x][i] < yTable[x-1][i] {
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t.Errorf("column %d is non-monotonic!", i)
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}
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}
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if !interesting {
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continue
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}
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}
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fmt.Printf("%d\t%d\t%d\t%d\n", x, yTable[x][0], yTable[x][1], yTable[x][2])
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}
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}
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