22 lines
373 B
Go
22 lines
373 B
Go
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package xm
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type xmCipher struct {
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mask byte
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encryptStartAt int
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}
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func newXmCipher(mask byte, encryptStartAt int) *xmCipher {
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return &xmCipher{
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mask: mask,
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encryptStartAt: encryptStartAt,
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}
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}
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func (c *xmCipher) Decrypt(buf []byte, offset int) {
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for i := 0; i < len(buf); i++ {
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if offset+i >= c.encryptStartAt {
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buf[i] ^= c.mask
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}
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}
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}
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