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27 #ifndef POLARSSL_CTR_DRBG_H
28 #define POLARSSL_CTR_DRBG_H
34 #define POLARSSL_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED -0x0034
35 #define POLARSSL_ERR_CTR_DRBG_REQUEST_TOO_BIG -0x0036
36 #define POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG -0x0038
37 #define POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR -0x003A
39 #define CTR_DRBG_BLOCKSIZE 16
40 #define CTR_DRBG_KEYSIZE 32
41 #define CTR_DRBG_KEYBITS ( CTR_DRBG_KEYSIZE * 8 )
42 #define CTR_DRBG_SEEDLEN ( CTR_DRBG_KEYSIZE + CTR_DRBG_BLOCKSIZE )
53 #if !defined(CTR_DRBG_ENTROPY_LEN)
54 #if defined(POLARSSL_SHA512_C) && !defined(POLARSSL_ENTROPY_FORCE_SHA256)
55 #define CTR_DRBG_ENTROPY_LEN 48
57 #define CTR_DRBG_ENTROPY_LEN 32
61 #if !defined(CTR_DRBG_RESEED_INTERVAL)
62 #define CTR_DRBG_RESEED_INTERVAL 10000
65 #if !defined(CTR_DRBG_MAX_INPUT)
66 #define CTR_DRBG_MAX_INPUT 256
69 #if !defined(CTR_DRBG_MAX_REQUEST)
70 #define CTR_DRBG_MAX_REQUEST 1024
73 #if !defined(CTR_DRBG_MAX_SEED_INPUT)
74 #define CTR_DRBG_MAX_SEED_INPUT 384
79 #define CTR_DRBG_PR_OFF 0
80 #define CTR_DRBG_PR_ON 1
91 unsigned char counter[16];
93 int prediction_resistance;
104 int (*f_entropy)(
void *,
unsigned char *, size_t);
128 int (*f_entropy)(
void *,
unsigned char *,
size_t),
130 const unsigned char *custom,
183 const unsigned char *additional,
size_t len );
193 const unsigned char *additional,
size_t add_len );
211 unsigned char *output,
size_t output_len,
212 const unsigned char *additional,
size_t add_len );
228 unsigned char *output,
size_t output_len );
230 #if defined(POLARSSL_FS_IO)
267 int (*)(
void *,
unsigned char *,
size_t),
void *,
268 const unsigned char *,
size_t,
size_t );