X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fcrypto.h;h=ac96ea88e1a676b4bdc902f5641709b7b4f41081;hb=c45a3fd7319d03bd147448a017f5aaed3b46fdfe;hp=4c7d23bfa2dca65047ab216447be53aa194b216d;hpb=2c6b2d70e6640f39563ad7bb0aa0ba87f883848c;p=tinc

diff --git a/src/crypto.h b/src/crypto.h
index 4c7d23bf..ac96ea88 100644
--- a/src/crypto.h
+++ b/src/crypto.h
@@ -23,7 +23,20 @@
 */
 
 extern void crypto_init(void);
-extern void crypto_exit(void);
-extern void randomize(void *buf, size_t buflen);
+extern uint64_t xoshiro(void);
+extern void prng_init(void);
+extern void prng_randomize(void *buf, size_t buflen);
+
+static inline uint32_t prng(uint32_t limit) {
+	uint64_t bins = UINT64_MAX / limit;
+	uint64_t reject_after = bins * limit;
+	uint64_t value;
+
+	do {
+		value = xoshiro();
+	} while(value >= reject_after);
+
+	return value / bins;
+}
 
 #endif