summaryrefslogtreecommitdiffstats
path: root/other-licenses/7zstub/src/CPP/7zip/Crypto/RandGen.cpp
diff options
context:
space:
mode:
authorwolfbeast <mcwerewolf@wolfbeast.com>2019-03-25 17:53:14 +0100
committerwolfbeast <mcwerewolf@wolfbeast.com>2019-03-25 17:53:14 +0100
commitf2902217b38cf2e16e851ae84d61247f8e828180 (patch)
tree0156a6db6aa8b4d87bf041ece5cf5229c59fe9de /other-licenses/7zstub/src/CPP/7zip/Crypto/RandGen.cpp
parent917a2c450f08ab4c934c9938319f10a1114272b4 (diff)
downloadUXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar
UXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar.gz
UXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar.lz
UXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar.xz
UXP-f2902217b38cf2e16e851ae84d61247f8e828180.zip
Update the 7z installer stub source to 18.05.
Tag #1022
Diffstat (limited to 'other-licenses/7zstub/src/CPP/7zip/Crypto/RandGen.cpp')
-rw-r--r--other-licenses/7zstub/src/CPP/7zip/Crypto/RandGen.cpp124
1 files changed, 124 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CPP/7zip/Crypto/RandGen.cpp b/other-licenses/7zstub/src/CPP/7zip/Crypto/RandGen.cpp
new file mode 100644
index 000000000..542f39bd5
--- /dev/null
+++ b/other-licenses/7zstub/src/CPP/7zip/Crypto/RandGen.cpp
@@ -0,0 +1,124 @@
+// RandGen.cpp
+
+#include "StdAfx.h"
+
+#ifndef _7ZIP_ST
+#include "../../Windows/Synchronization.h"
+#endif
+
+#include "RandGen.h"
+
+#ifndef _WIN32
+#include <unistd.h>
+#define USE_POSIX_TIME
+#define USE_POSIX_TIME2
+#endif
+
+#ifdef USE_POSIX_TIME
+#include <time.h>
+#ifdef USE_POSIX_TIME2
+#include <sys/time.h>
+#endif
+#endif
+
+// This is not very good random number generator.
+// Please use it only for salt.
+// First generated data block depends from timer and processID.
+// Other generated data blocks depend from previous state
+// Maybe it's possible to restore original timer value from generated value.
+
+#define HASH_UPD(x) Sha256_Update(&hash, (const Byte *)&x, sizeof(x));
+
+void CRandomGenerator::Init()
+{
+ CSha256 hash;
+ Sha256_Init(&hash);
+
+ #ifdef _WIN32
+ DWORD w = ::GetCurrentProcessId();
+ HASH_UPD(w);
+ w = ::GetCurrentThreadId();
+ HASH_UPD(w);
+ #else
+ pid_t pid = getpid();
+ HASH_UPD(pid);
+ pid = getppid();
+ HASH_UPD(pid);
+ #endif
+
+ for (unsigned i = 0; i <
+ #ifdef _DEBUG
+ 2;
+ #else
+ 1000;
+ #endif
+ i++)
+ {
+ #ifdef _WIN32
+ LARGE_INTEGER v;
+ if (::QueryPerformanceCounter(&v))
+ HASH_UPD(v.QuadPart);
+ #endif
+
+ #ifdef USE_POSIX_TIME
+ #ifdef USE_POSIX_TIME2
+ timeval v;
+ if (gettimeofday(&v, 0) == 0)
+ {
+ HASH_UPD(v.tv_sec);
+ HASH_UPD(v.tv_usec);
+ }
+ #endif
+ time_t v2 = time(NULL);
+ HASH_UPD(v2);
+ #endif
+
+ #ifdef _WIN32
+ DWORD tickCount = ::GetTickCount();
+ HASH_UPD(tickCount);
+ #endif
+
+ for (unsigned j = 0; j < 100; j++)
+ {
+ Sha256_Final(&hash, _buff);
+ Sha256_Init(&hash);
+ Sha256_Update(&hash, _buff, SHA256_DIGEST_SIZE);
+ }
+ }
+ Sha256_Final(&hash, _buff);
+ _needInit = false;
+}
+
+#ifndef _7ZIP_ST
+ static NWindows::NSynchronization::CCriticalSection g_CriticalSection;
+ #define MT_LOCK NWindows::NSynchronization::CCriticalSectionLock lock(g_CriticalSection);
+#else
+ #define MT_LOCK
+#endif
+
+void CRandomGenerator::Generate(Byte *data, unsigned size)
+{
+ MT_LOCK
+
+ if (_needInit)
+ Init();
+ while (size != 0)
+ {
+ CSha256 hash;
+
+ Sha256_Init(&hash);
+ Sha256_Update(&hash, _buff, SHA256_DIGEST_SIZE);
+ Sha256_Final(&hash, _buff);
+
+ Sha256_Init(&hash);
+ UInt32 salt = 0xF672ABD1;
+ HASH_UPD(salt);
+ Sha256_Update(&hash, _buff, SHA256_DIGEST_SIZE);
+ Byte buff[SHA256_DIGEST_SIZE];
+ Sha256_Final(&hash, buff);
+ for (unsigned i = 0; i < SHA256_DIGEST_SIZE && size != 0; i++, size--)
+ *data++ = buff[i];
+ }
+}
+
+CRandomGenerator g_RandomGenerator;