Update to 7-Zip Version 19.00

- Encryption strength for 7z archives was increased the size of random
  initialization vector was increased from 64-bit to 128-bit, and the
  pseudo-random number generator was improved.
- Some bugs were fixed.

CPP/7zip/Crypto/RandGen.h

@@ -5,6 +5,21 @@
 
 #include "../../../C/Sha256.h"
 
+#ifdef _WIN64
+// #define USE_STATIC_SYSTEM_RAND
+#endif
+
+#ifdef USE_STATIC_SYSTEM_RAND
+
+#ifdef _WIN32
+#include <ntsecapi.h>
+#define MY_RAND_GEN(data, size) RtlGenRandom(data, size)
+#else
+#define MY_RAND_GEN(data, size) getrandom(data, size, 0)
+#endif
+
+#else
+
 class CRandomGenerator
 {
   Byte _buff[SHA256_DIGEST_SIZE];
@@ -18,4 +33,8 @@ public:
 
 extern CRandomGenerator g_RandomGenerator;
 
+#define MY_RAND_GEN(data, size) g_RandomGenerator.Generate(data, size)
+
+#endif
+
 #endif