53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
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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/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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var c2p [rangeMax]uint64
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var p2c [rangeMax]uint64
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// Calculate values
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for i := range c2p {
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c2p[i] = ce.CipherSizeToPlainSize(uint64(i))
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p2c[i] = ce.PlainSizeToCipherSize(uint64(i))
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}
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// Print data table
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fmt.Print("x\tToPlainSize\tToCipherSize\n")
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for i := range c2p {
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if i > 1 && i < 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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if c2p[i] == c2p[i-1]+1 && p2c[i] == p2c[i-1]+1 && c2p[i+1] == c2p[i]+1 && p2c[i+1] == p2c[i]+1 {
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continue
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}
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}
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fmt.Printf("%d\t%d\t%d\n", i, c2p[i], p2c[i])
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}
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// Monotonicity check
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for i := range c2p {
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if i < 1 {
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continue
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}
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if c2p[i-1] > c2p[i] {
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t.Errorf("error: c2p is non-monotonic: c2p[%d]=%d c2p[%d]=%d ", i-1, c2p[i-1], i, c2p[i])
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}
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if p2c[i-1] > p2c[i] {
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t.Errorf("error: p2c is non-monotonic: p2c[%d]=%d p2c[%d]=%d ", i-1, p2c[i-1], i, p2c[i])
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}
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}
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}
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