Wickr_stream_iv

Data Structures
struct	wickr_stream_iv
	A deterministic random IV generator using a 64 byte secure random seed and HMAC-SHA512. More...

Functions
wickr_stream_iv_t *	wickr_stream_iv_create (const wickr_crypto_engine_t engine, wickr_cipher_t cipher)
wickr_stream_iv_t *	wickr_stream_iv_copy (const wickr_stream_iv_t *iv)
void	wickr_stream_iv_destroy (wickr_stream_iv_t **iv)
wickr_buffer_t *	wickr_stream_iv_generate (wickr_stream_iv_t *iv)

Detailed Description

Function Documentation

wickr_stream_iv_copy()

wickr_stream_iv_t* wickr_stream_iv_copy

(

const wickr_stream_iv_t *

iv

)

Copy a stream iv generator

Parameters

iv	the stream iv generator to copy

Returns

a newly allocated stream iv generator set holding a deep copy of the properties of 'source'

wickr_stream_iv_create()

wickr_stream_iv_t* wickr_stream_iv_create	(	const wickr_crypto_engine_t	engine,
		wickr_cipher_t	cipher
	)

Create a stream iv generator using an engine and cipher

Parameters

engine	see 'wickr_stream_iv' property documentation
cipher	see 'wickr_stream_iv' property documentation

Returns

a newly allocated stream iv generator

wickr_stream_iv_destroy()

void wickr_stream_iv_destroy

(

wickr_stream_iv_t **

iv

)

Destroy a stream iv generator

Parameters

iv	a pointer to a stream iv generator to destroy. Will destroy the sub properties of '*iv' as well

wickr_stream_iv_generate()

wickr_buffer_t* wickr_stream_iv_generate

(

wickr_stream_iv_t *

iv

)

Generate a new unique IV. gen_count will be increamented after calling this method, so subsequent calls will output unique values

Parameters

iv	the stream iv generator to use for IV generation

Returns

an IV of length 'cipher'->iv_len generated using HMAC(gen_count, seed)