Function ocrypto_poly1305_final 

pub unsafe extern "C" fn ocrypto_poly1305_final(
    ctx: *mut ocrypto_poly1305_ctx,
    r: *mut u8,
)

Poly1305 generator output.

The generator state * ctx - is updated to finalize the authenticator for the previously processed message chunks. The authentication tag is put into * r - .

• ctx - Generator state.
• r - Generated authentication tag.

@remark Initialization of the generator state * ctx - through * ocrypto_poly1305_init - is required before this function can be called.

@remark After return, the generator state * ctx - must no longer be used with * ocrypto_poly1305_update - and * ocrypto_poly1305_final - unless it is reinitialized using * ocrypto_poly1305_init - .