106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
/* ---- PRNG Stuff ---- */
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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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};
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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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struct fortuna_prng {
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hash_state pool[32]; /* the 32 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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};
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typedef union Prng_state {
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struct yarrow_prng yarrow;
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struct rc4_prng rc4;
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struct fortuna_prng fortuna;
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} prng_state;
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extern struct _prng_descriptor {
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char *name;
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int (*start)(prng_state *);
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int (*add_entropy)(const unsigned char *, unsigned long, prng_state *);
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int (*ready)(prng_state *);
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unsigned long (*read)(unsigned char *, unsigned long, prng_state *);
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void (*done)(prng_state *);
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int (*export)(unsigned char *, unsigned long *, prng_state *);
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int (*import)(const unsigned char *, unsigned long, prng_state *);
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} prng_descriptor[];
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#ifdef YARROW
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int yarrow_start(prng_state *prng);
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int yarrow_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
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int yarrow_ready(prng_state *prng);
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unsigned long yarrow_read(unsigned char *buf, unsigned long len, prng_state *prng);
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void 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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extern const struct _prng_descriptor yarrow_desc;
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#endif
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#ifdef FORTUNA
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int fortuna_start(prng_state *prng);
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int fortuna_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
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int fortuna_ready(prng_state *prng);
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unsigned long fortuna_read(unsigned char *buf, unsigned long len, prng_state *prng);
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void 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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extern const struct _prng_descriptor fortuna_desc;
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#endif
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#ifdef RC4
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int rc4_start(prng_state *prng);
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int rc4_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
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int rc4_ready(prng_state *prng);
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unsigned long rc4_read(unsigned char *buf, unsigned long len, prng_state *prng);
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void 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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extern const struct _prng_descriptor rc4_desc;
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#endif
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#ifdef SPRNG
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int sprng_start(prng_state *prng);
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int sprng_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
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int sprng_ready(prng_state *prng);
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unsigned long sprng_read(unsigned char *buf, unsigned long len, prng_state *prng);
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void 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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extern const struct _prng_descriptor sprng_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 _prng_descriptor *prng);
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int unregister_prng(const struct _prng_descriptor *prng);
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int prng_is_valid(int idx);
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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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/* ch2-02-1 */
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unsigned long rng_get_bytes(unsigned char *buf,
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unsigned long len,
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void (*callback)(void));
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/* ch2-02-1 */
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int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void));
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