200 lines
7.0 KiB
C
200 lines
7.0 KiB
C
/* ---- PRNG Stuff ---- */
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#ifdef LTC_YARROW
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struct yarrow_prng {
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int cipher, hash;
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unsigned char pool[MAXBLOCKSIZE];
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symmetric_CTR ctr;
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LTC_MUTEX_TYPE(prng_lock)
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};
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#endif
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#ifdef LTC_RC4
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struct rc4_prng {
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int x, y;
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unsigned char buf[256];
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};
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#endif
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#ifdef LTC_FORTUNA
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struct fortuna_prng {
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hash_state pool[LTC_FORTUNA_POOLS]; /* the pools */
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symmetric_key skey;
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unsigned char K[32], /* the current key */
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IV[16]; /* IV for CTR mode */
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unsigned long pool_idx, /* current pool we will add to */
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pool0_len, /* length of 0'th pool */
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wd;
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ulong64 reset_cnt; /* number of times we have reset */
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LTC_MUTEX_TYPE(prng_lock)
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};
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#endif
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#ifdef LTC_SOBER128
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struct sober128_prng {
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ulong32 R[17], /* Working storage for the shift register */
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initR[17], /* saved register contents */
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konst, /* key dependent constant */
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sbuf; /* partial word encryption buffer */
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int nbuf, /* number of part-word stream bits buffered */
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flag, /* first add_entropy call or not? */
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set; /* did we call add_entropy to set key? */
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};
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#endif
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typedef union Prng_state {
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char dummy[1];
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#ifdef LTC_YARROW
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struct yarrow_prng yarrow;
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#endif
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#ifdef LTC_RC4
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struct rc4_prng rc4;
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#endif
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#ifdef LTC_FORTUNA
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struct fortuna_prng fortuna;
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#endif
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#ifdef LTC_SOBER128
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struct sober128_prng sober128;
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#endif
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} prng_state;
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/** PRNG descriptor */
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extern struct ltc_prng_descriptor {
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/** Name of the PRNG */
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char *name;
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/** size in bytes of exported state */
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int export_size;
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/** Start a PRNG state
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@param prng [out] The state to initialize
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@return CRYPT_OK if successful
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*/
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int (*start)(prng_state *prng);
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/** Add entropy to the PRNG
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@param in The entropy
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@param inlen Length of the entropy (octets)\
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@param prng The PRNG state
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@return CRYPT_OK if successful
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*/
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int (*add_entropy)(const unsigned char *in, unsigned long inlen, prng_state *prng);
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/** Ready a PRNG state to read from
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@param prng The PRNG state to ready
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@return CRYPT_OK if successful
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*/
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int (*ready)(prng_state *prng);
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/** Read from the PRNG
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@param out [out] Where to store the data
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@param outlen Length of data desired (octets)
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@param prng The PRNG state to read from
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@return Number of octets read
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*/
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unsigned long (*read)(unsigned char *out, unsigned long outlen, prng_state *prng);
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/** Terminate a PRNG state
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@param prng The PRNG state to terminate
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@return CRYPT_OK if successful
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*/
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int (*done)(prng_state *prng);
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/** Export a PRNG state
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@param out [out] The destination for the state
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@param outlen [in/out] The max size and resulting size of the PRNG state
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@param prng The PRNG to export
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@return CRYPT_OK if successful
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*/
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int (*pexport)(unsigned char *out, unsigned long *outlen, prng_state *prng);
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/** Import a PRNG state
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@param in The data to import
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@param inlen The length of the data to import (octets)
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@param prng The PRNG to initialize/import
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@return CRYPT_OK if successful
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*/
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int (*pimport)(const unsigned char *in, unsigned long inlen, prng_state *prng);
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/** Self-test the PRNG
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@return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
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*/
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int (*test)(void);
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} prng_descriptor[];
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#ifdef LTC_YARROW
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int yarrow_start(prng_state *prng);
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int yarrow_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int yarrow_ready(prng_state *prng);
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unsigned long yarrow_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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int yarrow_done(prng_state *prng);
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int yarrow_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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int yarrow_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int yarrow_test(void);
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extern const struct ltc_prng_descriptor yarrow_desc;
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#endif
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#ifdef LTC_FORTUNA
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int fortuna_start(prng_state *prng);
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int fortuna_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int fortuna_ready(prng_state *prng);
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unsigned long fortuna_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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int fortuna_done(prng_state *prng);
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int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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int fortuna_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int fortuna_test(void);
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extern const struct ltc_prng_descriptor fortuna_desc;
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#endif
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#ifdef LTC_RC4
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int rc4_start(prng_state *prng);
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int rc4_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int rc4_ready(prng_state *prng);
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unsigned long rc4_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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int rc4_done(prng_state *prng);
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int rc4_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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int rc4_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int rc4_test(void);
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extern const struct ltc_prng_descriptor rc4_desc;
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#endif
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#ifdef LTC_SPRNG
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int sprng_start(prng_state *prng);
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int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int sprng_ready(prng_state *prng);
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unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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int sprng_done(prng_state *prng);
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int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int sprng_test(void);
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extern const struct ltc_prng_descriptor sprng_desc;
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#endif
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#ifdef LTC_SOBER128
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int sober128_start(prng_state *prng);
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int sober128_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int sober128_ready(prng_state *prng);
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unsigned long sober128_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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int sober128_done(prng_state *prng);
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int sober128_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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int sober128_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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int sober128_test(void);
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extern const struct ltc_prng_descriptor sober128_desc;
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#endif
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int find_prng(const char *name);
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int register_prng(const struct ltc_prng_descriptor *prng);
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int unregister_prng(const struct ltc_prng_descriptor *prng);
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int prng_is_valid(int idx);
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LTC_MUTEX_PROTO(ltc_prng_mutex)
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/* Slow RNG you **might** be able to use to seed a PRNG with. Be careful as this
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* might not work on all platforms as planned
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*/
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unsigned long rng_get_bytes(unsigned char *out,
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unsigned long outlen,
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void (*callback)(void));
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int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void));
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/* $Source$ */
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/* $Revision$ */
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/* $Date$ */
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