ocrypto_chacha20_poly1305_update_dec()

void ocrypto_chacha20_poly1305_update_dec	(	ocrypto_chacha20_poly1305_ctx *	ctx,
		uint8_t *	m,
		const uint8_t *	c,
		size_t	c_len
	)

#include <crypto/nrf_oberon/include/ocrypto_chacha20_poly1305.h>

ChaCha20-Poly1305 incremental decoder input.

The generator state ctx is updated to include a ciphertext chunk c.

This function can be called repeatedly on arbitrarily small chunks of the ciphertext until the whole ciphertext has been processed.

Parameters

	ctx	Generator state.
[out]	m	Decoded message. Same length as received ciphertext.
	c	Ciphertext chunk.
	c_len	Length of c.

Remarks

Initialization of the generator state ctx through ocrypto_chacha20_poly1305_init is required before this function can be called.

ocrypto_chacha20_poly1305_update_dec must be called after any call to ocrypto_chacha20_poly1305_update_aad.

m may be same as c.