put PRNG descriptor into state

Author: sjaeckel

helper.pl

@@ -133,7 +133,6 @@ sub check_descriptors {
   my $fails = 0;
   $fails = $fails + check_descriptor("ciphers", "cipher");
   $fails = $fails + check_descriptor("hashes", "hash");
-  $fails = $fails + check_descriptor("prngs", "prng");
   return $fails;
 }
 

src/headers/tomcrypt_prng.h

@@ -48,31 +48,10 @@ struct sober128_prng {
 };
 #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
-   } u;
-   short ready;            /* ready flag 0-1 */
-   LTC_MUTEX_TYPE(lock)    /* lock */
-} prng_state;
+typedef struct ltc_prng_state prng_state;
 
 /** PRNG descriptor */
-extern struct ltc_prng_descriptor {
+struct ltc_prng_descriptor {
     /** Name of the PRNG */
     const char *name;
     /** size in bytes of exported state */
@@ -124,7 +103,31 @@ extern struct ltc_prng_descriptor {
         @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
     */
     int (*test)(void);
-} prng_descriptor[];
+};
+
+struct ltc_prng_state {
+   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
+   } u;
+   short ready;            /* ready flag 0-1 */
+   struct ltc_prng_descriptor desc;
+   LTC_MUTEX_TYPE(lock)    /* lock */
+};
 
 #ifdef LTC_YARROW
 int yarrow_start(prng_state *prng);
@@ -135,7 +138,6 @@ 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
@@ -149,7 +151,6 @@ 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_update_seed(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
@@ -161,7 +162,6 @@ 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
@@ -173,7 +173,6 @@ 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
@@ -185,7 +184,6 @@ 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
@@ -197,24 +195,16 @@ 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));
+int rng_make_prng(int bits, prng_state *prng, void (*callback)(void));
 
 #ifdef LTC_PRNG_ENABLE_LTC_RNG
 extern unsigned long (*ltc_rng)(unsigned char *out, unsigned long outlen,

src/misc/crypt/crypt_find_prng.c

@@ -9,7 +9,7 @@
 
 #ifdef LTC_CHACHA20_PRNG
 
-const struct ltc_prng_descriptor chacha20_prng_desc =
+static const struct ltc_prng_descriptor chacha20_prng_desc =
 {
    "chacha20",
    40,
@@ -34,6 +34,7 @@ int chacha20_prng_start(prng_state *prng)
    prng->ready = 0;
    XMEMSET(&prng->u.chacha.ent, 0, sizeof(prng->u.chacha.ent));
    prng->u.chacha.idx = 0;
+   prng->desc = chacha20_prng_desc;
    LTC_MUTEX_INIT(&prng->lock)
    return CRYPT_OK;
 }