pub fn parse_local_state_encrypted_key(
encrypted_key_b64: &[u8],
) -> Result<Vec<u8>, DpapiError>Expand description
Decode a Chrome/Edge Local State os_crypt.encrypted_key value into the
inner DPAPI blob bytes.
encrypted_key_b64 is the raw base64 string (the JSON field value bytes).
Chrome stores base64("DPAPI" + dpapi_blob), so this base64-decodes the input
and strips the mandatory 5-byte DPAPI prefix, returning the DPAPI blob ready
for decrypt_local_state_key.
Errors loudly — malformed base64 (DpapiError::Base64Error) or a missing
DPAPI prefix (DpapiError::MissingDpapiPrefix, which names the bytes that
were actually present) — rather than guessing.