Function ocrypto_poly1305 

pub unsafe extern "C" fn ocrypto_poly1305(
    r: *mut u8,
    in_: *const u8,
    in_len: usize,
    k: *const u8,
)

Poly1305 message authentication tag.

The Poly1305 authentication of a given input message * in - is computed using key * k - and put into * r - .

• r - Generated authentication tag.
• in - Input data.
• in_len - Length of * in - .
• k - Authentication key.