RNG随机数获取接口

struct wcrypto_rng_msg {
__u8 alg_type; /* Denoted by enum wcrypto_type */
__u8 op_type;/* Denoted by enum wcrypto_rng_op_type */
__u8 data_fmt; /* Data format, denoted by enum wd_buff_type */
__u8 result;/* Data format, denoted by WD error code */
__u8 *out; /* Result address */
__u8 *in; /* Input address */
__u32 out_bytes; /* output bytes */
__u32 in_bytes; /* input bytes */
__u64 usr_tag; /* user identifier */
};

enum wcrypto_rng_op_type {
WCRYPTO_RNG_INVALID,/* Invalid RNG operational type */
WCRYPTO_DRBG_RESEED,/* seed operation */
WCRYPTO_DRBG_GEN,/* deterministic random number generation */
WCRYPTO_TRNG_GEN, /* true random number generation */
};

struct wcrypto_rng_ctx_setup {
wcrypto_cb cb;
__u16 data_fmt; /* Data format, denoted by enum wd_buff_type */
enum wcrypto_type type;/* Please refer to the definition of enum */
enum wcrypto_cipher_alg calg;/* DRBG cipher algorithm */
enum wcrypto_cipher_mode cmode; /* DRBG cipher mode */
enum wcrypto_digest_alg dalg; /* DRBG digest algorithm */
enum wcrypto_digest_mode dmode; /* DRBG digest mode */
};

struct wcrypto_rng_op_data {
enum wcrypto_rng_op_type op_type;
__u32 status; /* Operation result status */
void *in;/* input */
void *out; /* output */
__u32 in_bytes; /* input bytes */
__u32 out_bytes; /* output bytes */
};