Function ocrypto_poly1305_init 

pub unsafe extern "C" fn ocrypto_poly1305_init(
    ctx: *mut ocrypto_poly1305_ctx,
    key: *const u8,
)

Incremental Poly1305 generator.

This group of functions can be used to incrementally compute the Poly1305 authenticator on a message.

Use pattern:

@code ocrypto_poly1305_init(ctx, key); ocrypto_poly1305_update(ctx, m, m_len); … ocrypto_chacha20_update(ctx, m, m_len); ocrypto_poly1305_final(ctx, tag); @endcode / /@{*/ / Poly1305 generator initialization.

The generator state * ctx - is initialized by this function.

• ctx - Generator state.
• key - Authentication key.