pub(crate) fn decode_secret<'a>(
input: &[u8],
output: &'a mut [u8],
) -> Result<&'a [u8], Error>Expand description
Decode base64 input, writing the result into output.
input is treated as secret, so efforts are made to avoid
leaking its value via side channels, such as timing,
memory accesses, and execution trace.
The following is deemed non-secret information:
- Appearance of whitespace in
input - Erroneous characters in
input(indeed, the first illegal character is quoted in the error type) - The length of
input - The length of
output
Returns the prefix of output that was written to.