解码点函数输出中的PublicKeySizeInvalid错误

Question

我在GHCI尝试这个功能，

import Data.ByteString.Char8
import Crypto.PubKey.ECIES 
import Crypto.ECC
import Data.Proxy

curve = Proxy :: Proxy Curve_X448

str = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
seed = Data.ByteString.Char8.pack str
d =  decodePoint curve seed
d

但它给出了一个错误CryptoFailed CryptoError_PublicKeySizeInvalid，什么应该是str的大小？

Answer 1

对于X448曲线，顾名思义，密钥大小应为448位，或56字节：

-- import ...

curve = Proxy :: Proxy Curve_X448

seed = Data.ByteString.Char8.replicate 56 'a'
d = decodePoint curve seed
d

打印出来：

CryptoPassed (PublicKey "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")