67 lines
2.2 KiB
C
67 lines
2.2 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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typedef union Prng_state {
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struct yarrow_prng yarrow;
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struct rc4_prng rc4;
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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 len, prng_state *);
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} prng_descriptor[];
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#ifdef YARROW
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extern int yarrow_start(prng_state *prng);
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extern int yarrow_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
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extern int yarrow_ready(prng_state *prng);
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extern unsigned long yarrow_read(unsigned char *buf, unsigned long len, prng_state *prng);
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extern const struct _prng_descriptor yarrow_desc;
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#endif
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#ifdef RC4
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extern int rc4_start(prng_state *prng);
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extern int rc4_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
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extern int rc4_ready(prng_state *prng);
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extern unsigned long rc4_read(unsigned char *buf, unsigned long len, 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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extern int sprng_start(prng_state *prng);
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extern int sprng_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
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extern int sprng_ready(prng_state *prng);
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extern unsigned long sprng_read(unsigned char *buf, unsigned long len, prng_state *prng);
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extern const struct _prng_descriptor sprng_desc;
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#endif
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extern int find_prng(const char *name);
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extern int register_prng(const struct _prng_descriptor *prng);
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extern int unregister_prng(const struct _prng_descriptor *prng);
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extern 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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extern 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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extern int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void));
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