Function deltachat::mimefactory::wrapped_base64_encode

pub(crate) fn wrapped_base64_encode(buf: &[u8]) -> String

Returns base64-encoded buffer buf split into 76-bytes long chunks separated by CRLF.

RFC2045 specification of base64 Content-Transfer-Encoding says that “The encoded output stream must be represented in lines of no more than 76 characters each.” Longer lines trigger BASE64_LENGTH_78_79 rule of SpamAssassin.