31 lines
883 B
Go
31 lines
883 B
Go
package cc20p1305ssh
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const (
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/*
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FullKeySize is 64, but OpenSSH only uses the first half for the (true) KeySize.
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(Normally in ChaCha20Poly1305, the second half is used for "additional data".
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OpenSSH keys do not have "additional data".)
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*/
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FullKeySize int = 64 // Generated by Poly1305...
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KeySize int = 32 // The first 32 of which are used by ChaCha20.
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// And for clarity, aliases for the above.
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Poly1305KeySize int = FullKeySize
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ChaCha20KeySize int = KeySize
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// IvSize is 0 because OpenSSH uses a fixed internal constant (see IV).
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IvSize int = 0
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// NonceSize is literally the only reason I need to do this. The only reason.
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NonceSize int = 16
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// TagLen is the length of the Poly1305 tag.
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TagLen int = 16
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)
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var (
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// iv is the constant fixed IV.
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iv []byte = []byte{
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0x0, 0x0, 0x0, 0x0,
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0x0, 0x0, 0x0, 0x0,
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0x0, 0x0, 0x0, 0x0,
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0x0, 0x0, 0x0, 0x0,
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}
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)
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