If the stream is not closed, then this winds up hanging forever. So
remove the trailing \n\n and check manually after.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
We also make these constant time, even though we're never distinguishing
between bits of a secret using them. From that perspective, though, this
is markedly better than the locale-specific table lookups in glibc, even
though base64 characters span two cache lines and valid private keys
must hit both.
Co-authored-by: Samuel Neves <sneves@dei.uc.pt>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Samuel Neves <sneves@dei.uc.pt>
