aes-kw: add fixed size methods #45
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newpavlov
commented
Nov 11, 2024
| @@ -19,6 +25,13 @@ const KWP_MAX_LEN: usize = u32::MAX as usize; | |||
| /// ``` | |||
| const KWP_IV_PREFIX: [u8; IV_LEN / 2] = [0xA6, 0x59, 0x59, 0xA6]; | |||
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| /// [`IvLen`] (`U8`) minus one | |||
| type IvLenM1 = U7; | |||
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For some very weird reason compiler does not like when we use Sub1<IvLen> instead of this type alias despite the fact that it evaluates to the exactly same type (UInt<UInt<UInt<UTerm, B1>, B1>, B1>). Compiler even mentions this type in the compilation error, but alas...
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newpavlov
commented
Nov 11, 2024
| Quot<Sum<N, IvLenM1>, IvLen>: Add<B1> + Mul<IvLen>, | ||
| Add1<Quot<Sum<N, IvLenM1>, IvLen>>: Mul<IvLen>, | ||
| Prod<Add1<Quot<Sum<N, IvLenM1>, IvLen>>, IvLen>: ArraySize, | ||
| Prod<Quot<Sum<N, IvLenM1>, IvLen>, IvLen>: ArraySize, |
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Yeap, typenum is fun. :)
newpavlov
commented
Nov 11, 2024
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Also rename
wrap/unwrapmethods towrap_key/unwrap_keyfor consistency withbelt-kwpand to better indicate the intended use.