diff options
Diffstat (limited to 'libtomcrypt/src/headers/tomcrypt_prng.h')
| -rw-r--r-- | libtomcrypt/src/headers/tomcrypt_prng.h | 89 |
1 files changed, 61 insertions, 28 deletions
diff --git a/libtomcrypt/src/headers/tomcrypt_prng.h b/libtomcrypt/src/headers/tomcrypt_prng.h index 508159d..c516b8c 100644 --- a/libtomcrypt/src/headers/tomcrypt_prng.h +++ b/libtomcrypt/src/headers/tomcrypt_prng.h @@ -1,17 +1,32 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + /* ---- PRNG Stuff ---- */ #ifdef LTC_YARROW struct yarrow_prng { int cipher, hash; unsigned char pool[MAXBLOCKSIZE]; symmetric_CTR ctr; - LTC_MUTEX_TYPE(prng_lock) }; #endif #ifdef LTC_RC4 struct rc4_prng { - int x, y; - unsigned char buf[256]; + rc4_state s; +}; +#endif + +#ifdef LTC_CHACHA20_PRNG +struct chacha20_prng { + chacha_state s; /* chacha state */ + unsigned char ent[40]; /* entropy buffer */ + unsigned long idx; /* entropy counter */ }; #endif @@ -23,50 +38,50 @@ struct fortuna_prng { unsigned char K[32], /* the current key */ IV[16]; /* IV for CTR mode */ - + unsigned long pool_idx, /* current pool we will add to */ pool0_len, /* length of 0'th pool */ - wd; + wd; ulong64 reset_cnt; /* number of times we have reset */ - LTC_MUTEX_TYPE(prng_lock) }; #endif #ifdef LTC_SOBER128 struct sober128_prng { - ulong32 R[17], /* Working storage for the shift register */ - initR[17], /* saved register contents */ - konst, /* key dependent constant */ - sbuf; /* partial word encryption buffer */ - - int nbuf, /* number of part-word stream bits buffered */ - flag, /* first add_entropy call or not? */ - set; /* did we call add_entropy to set key? */ - + sober128_state s; /* sober128 state */ + unsigned char ent[40]; /* entropy buffer */ + unsigned long idx; /* entropy counter */ }; #endif -typedef union Prng_state { - char dummy[1]; +typedef struct { + union { + char dummy[1]; #ifdef LTC_YARROW - struct yarrow_prng yarrow; + struct yarrow_prng yarrow; #endif #ifdef LTC_RC4 - struct rc4_prng rc4; + struct rc4_prng rc4; +#endif +#ifdef LTC_CHACHA20_PRNG + struct chacha20_prng chacha; #endif #ifdef LTC_FORTUNA - struct fortuna_prng fortuna; + struct fortuna_prng fortuna; #endif #ifdef LTC_SOBER128 - struct sober128_prng sober128; + struct sober128_prng sober128; #endif + }; + short ready; /* ready flag 0-1 */ + LTC_MUTEX_TYPE(lock) /* lock */ } prng_state; /** PRNG descriptor */ extern struct ltc_prng_descriptor { /** Name of the PRNG */ - char *name; + const char *name; /** size in bytes of exported state */ int export_size; /** Start a PRNG state @@ -98,7 +113,7 @@ extern struct ltc_prng_descriptor { @return CRYPT_OK if successful */ int (*done)(prng_state *prng); - /** Export a PRNG state + /** Export a PRNG state @param out [out] The destination for the state @param outlen [in/out] The max size and resulting size of the PRNG state @param prng The PRNG to export @@ -154,6 +169,18 @@ int rc4_test(void); extern const struct ltc_prng_descriptor rc4_desc; #endif +#ifdef LTC_CHACHA20_PRNG +int chacha20_prng_start(prng_state *prng); +int chacha20_prng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng); +int chacha20_prng_ready(prng_state *prng); +unsigned long chacha20_prng_read(unsigned char *out, unsigned long outlen, prng_state *prng); +int chacha20_prng_done(prng_state *prng); +int chacha20_prng_export(unsigned char *out, unsigned long *outlen, prng_state *prng); +int chacha20_prng_import(const unsigned char *in, unsigned long inlen, prng_state *prng); +int chacha20_prng_test(void); +extern const struct ltc_prng_descriptor chacha20_prng_desc; +#endif + #ifdef LTC_SPRNG int sprng_start(prng_state *prng); int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng); @@ -181,19 +208,25 @@ extern const struct ltc_prng_descriptor sober128_desc; int find_prng(const char *name); int register_prng(const struct ltc_prng_descriptor *prng); int unregister_prng(const struct ltc_prng_descriptor *prng); +int register_all_prngs(void); int prng_is_valid(int idx); LTC_MUTEX_PROTO(ltc_prng_mutex) /* Slow RNG you **might** be able to use to seed a PRNG with. Be careful as this * might not work on all platforms as planned */ -unsigned long rng_get_bytes(unsigned char *out, - unsigned long outlen, +unsigned long rng_get_bytes(unsigned char *out, + unsigned long outlen, void (*callback)(void)); int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void)); +#ifdef LTC_PRNG_ENABLE_LTC_RNG +extern unsigned long (*ltc_rng)(unsigned char *out, unsigned long outlen, + void (*callback)(void)); +#endif + -/* $Source$ */ -/* $Revision$ */ -/* $Date$ */ +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |