--- /dev/null
+/* 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;
+};
+#endif
+
+#ifdef LTC_RC4
+struct rc4_prng {
+ 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
+
+#ifdef LTC_FORTUNA
+struct fortuna_prng {
+ hash_state pool[LTC_FORTUNA_POOLS]; /* the pools */
+
+ symmetric_key skey;
+
+ 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;
+
+ ulong64 reset_cnt; /* number of times we have reset */
+};
+#endif
+
+#ifdef LTC_SOBER128
+struct sober128_prng {
+ sober128_state s; /* sober128 state */
+ unsigned char ent[40]; /* entropy buffer */
+ unsigned long idx; /* entropy counter */
+};
+#endif
+
+typedef struct {
+ union {
+ char dummy[1];
+#ifdef LTC_YARROW
+ struct yarrow_prng yarrow;
+#endif
+#ifdef LTC_RC4
+ struct rc4_prng rc4;
+#endif
+#ifdef LTC_CHACHA20_PRNG
+ struct chacha20_prng chacha;
+#endif
+#ifdef LTC_FORTUNA
+ struct fortuna_prng fortuna;
+#endif
+#ifdef LTC_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 */
+ const char *name;
+ /** size in bytes of exported state */
+ int export_size;
+ /** Start a PRNG state
+ @param prng [out] The state to initialize
+ @return CRYPT_OK if successful
+ */
+ int (*start)(prng_state *prng);
+ /** Add entropy to the PRNG
+ @param in The entropy
+ @param inlen Length of the entropy (octets)\
+ @param prng The PRNG state
+ @return CRYPT_OK if successful
+ */
+ int (*add_entropy)(const unsigned char *in, unsigned long inlen, prng_state *prng);
+ /** Ready a PRNG state to read from
+ @param prng The PRNG state to ready
+ @return CRYPT_OK if successful
+ */
+ int (*ready)(prng_state *prng);
+ /** Read from the PRNG
+ @param out [out] Where to store the data
+ @param outlen Length of data desired (octets)
+ @param prng The PRNG state to read from
+ @return Number of octets read
+ */
+ unsigned long (*read)(unsigned char *out, unsigned long outlen, prng_state *prng);
+ /** Terminate a PRNG state
+ @param prng The PRNG state to terminate
+ @return CRYPT_OK if successful
+ */
+ int (*done)(prng_state *prng);
+ /** 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
+ @return CRYPT_OK if successful
+ */
+ int (*pexport)(unsigned char *out, unsigned long *outlen, prng_state *prng);
+ /** Import a PRNG state
+ @param in The data to import
+ @param inlen The length of the data to import (octets)
+ @param prng The PRNG to initialize/import
+ @return CRYPT_OK if successful
+ */
+ int (*pimport)(const unsigned char *in, unsigned long inlen, prng_state *prng);
+ /** Self-test the PRNG
+ @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
+ */
+ int (*test)(void);
+} prng_descriptor[];
+
+#ifdef LTC_YARROW
+int yarrow_start(prng_state *prng);
+int yarrow_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int yarrow_ready(prng_state *prng);
+unsigned long yarrow_read(unsigned char *out, unsigned long outlen, prng_state *prng);
+int yarrow_done(prng_state *prng);
+int yarrow_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
+int yarrow_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int yarrow_test(void);
+extern const struct ltc_prng_descriptor yarrow_desc;
+#endif
+
+#ifdef LTC_FORTUNA
+int fortuna_start(prng_state *prng);
+int fortuna_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int fortuna_ready(prng_state *prng);
+unsigned long fortuna_read(unsigned char *out, unsigned long outlen, prng_state *prng);
+int fortuna_done(prng_state *prng);
+int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
+int fortuna_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int fortuna_test(void);
+extern const struct ltc_prng_descriptor fortuna_desc;
+#endif
+
+#ifdef LTC_RC4
+int rc4_start(prng_state *prng);
+int rc4_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int rc4_ready(prng_state *prng);
+unsigned long rc4_read(unsigned char *out, unsigned long outlen, prng_state *prng);
+int rc4_done(prng_state *prng);
+int rc4_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
+int rc4_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
+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);
+int sprng_ready(prng_state *prng);
+unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng);
+int sprng_done(prng_state *prng);
+int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
+int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int sprng_test(void);
+extern const struct ltc_prng_descriptor sprng_desc;
+#endif
+
+#ifdef LTC_SOBER128
+int sober128_start(prng_state *prng);
+int sober128_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int sober128_ready(prng_state *prng);
+unsigned long sober128_read(unsigned char *out, unsigned long outlen, prng_state *prng);
+int sober128_done(prng_state *prng);
+int sober128_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
+int sober128_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
+int sober128_test(void);
+extern const struct ltc_prng_descriptor sober128_desc;
+#endif
+
+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,
+ 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
+
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */
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