The ASN.1 decoder was originally using AK::BitmapView for decoded
BitStrings, however the specification requires that the bits are stored
in a byte from the most significant to the least significant.
Storing three bits '110' would result in a byte '1100 0000', i.e. 0xC0.
However, AK::BitmapView expects the bits to be stored at the bottom like
'0000 0110', i.e. 0x06. For the current uses the data was always a
multiple of eight bits, resulting in complete bytes, which could
directly be interpreted correctly.
For the implementation of the key usage extension of certificates the
correct implementation of the BitString is required.
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